diff --git a/canvas/package-lock.json b/canvas/package-lock.json
index 4016b28..24abe14 100644
--- a/canvas/package-lock.json
+++ b/canvas/package-lock.json
@@ -14,13 +14,45 @@
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@@ -1221,6 +1378,90 @@
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@@ -1628,6 +2044,30 @@
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+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "tldts": "^6.1.32"
+      },
+      "engines": {
+        "node": ">=16"
+      }
+    },
+    "node_modules/tr46": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-5.1.1.tgz",
+      "integrity": "sha512-hdF5ZgjTqgAntKkklYw0R03MG2x/bSzTtkxmIRw/sTNV8YXsCJ1tfLAX23lhxhHJlEf3CRCOCGGWw3vI3GaSPw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "punycode": "^2.3.1"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/typescript": {
       "version": "5.9.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
@@ -2240,6 +3458,212 @@
         }
       }
     },
+    "node_modules/vite-node": {
+      "version": "2.1.9",
+      "resolved": "https://registry.npmjs.org/vite-node/-/vite-node-2.1.9.tgz",
+      "integrity": "sha512-AM9aQ/IPrW/6ENLQg3AGY4K1N2TGZdR5e4gu/MmmR2xR3Ll1+dib+nook92g4TV3PXVyeyxdWwtaCAiUL0hMxA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "cac": "^6.7.14",
+        "debug": "^4.3.7",
+        "es-module-lexer": "^1.5.4",
+        "pathe": "^1.1.2",
+        "vite": "^5.0.0"
+      },
+      "bin": {
+        "vite-node": "vite-node.mjs"
+      },
+      "engines": {
+        "node": "^18.0.0 || >=20.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/vitest": {
+      "version": "2.1.9",
+      "resolved": "https://registry.npmjs.org/vitest/-/vitest-2.1.9.tgz",
+      "integrity": "sha512-MSmPM9REYqDGBI8439mA4mWhV5sKmDlBKWIYbA3lRb2PTHACE0mgKwA8yQ2xq9vxDTuk4iPrECBAEW2aoFXY0Q==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/expect": "2.1.9",
+        "@vitest/mocker": "2.1.9",
+        "@vitest/pretty-format": "^2.1.9",
+        "@vitest/runner": "2.1.9",
+        "@vitest/snapshot": "2.1.9",
+        "@vitest/spy": "2.1.9",
+        "@vitest/utils": "2.1.9",
+        "chai": "^5.1.2",
+        "debug": "^4.3.7",
+        "expect-type": "^1.1.0",
+        "magic-string": "^0.30.12",
+        "pathe": "^1.1.2",
+        "std-env": "^3.8.0",
+        "tinybench": "^2.9.0",
+        "tinyexec": "^0.3.1",
+        "tinypool": "^1.0.1",
+        "tinyrainbow": "^1.2.0",
+        "vite": "^5.0.0",
+        "vite-node": "2.1.9",
+        "why-is-node-running": "^2.3.0"
+      },
+      "bin": {
+        "vitest": "vitest.mjs"
+      },
+      "engines": {
+        "node": "^18.0.0 || >=20.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@edge-runtime/vm": "*",
+        "@types/node": "^18.0.0 || >=20.0.0",
+        "@vitest/browser": "2.1.9",
+        "@vitest/ui": "2.1.9",
+        "happy-dom": "*",
+        "jsdom": "*"
+      },
+      "peerDependenciesMeta": {
+        "@edge-runtime/vm": {
+          "optional": true
+        },
+        "@types/node": {
+          "optional": true
+        },
+        "@vitest/browser": {
+          "optional": true
+        },
+        "@vitest/ui": {
+          "optional": true
+        },
+        "happy-dom": {
+          "optional": true
+        },
+        "jsdom": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/w3c-xmlserializer": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-5.0.0.tgz",
+      "integrity": "sha512-o8qghlI8NZHU1lLPrpi2+Uq7abh4GGPpYANlalzWxyWteJOCsr/P+oPBA49TOLu5FTZO4d3F9MnWJfiMo4BkmA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "xml-name-validator": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/webidl-conversions": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-7.0.0.tgz",
+      "integrity": "sha512-VwddBukDzu71offAQR975unBIGqfKZpM+8ZX6ySk8nYhVoo5CYaZyzt3YBvYtRtO+aoGlqxPg/B87NGVZ/fu6g==",
+      "dev": true,
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/whatwg-encoding": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-3.1.1.tgz",
+      "integrity": "sha512-6qN4hJdMwfYBtE3YBTTHhoeuUrDBPZmbQaxWAqSALV/MeEnR5z1xd8UKud2RAkFoPkmB+hli1TZSnyi84xz1vQ==",
+      "deprecated": "Use @exodus/bytes instead for a more spec-conformant and faster implementation",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "iconv-lite": "0.6.3"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/whatwg-mimetype": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-4.0.0.tgz",
+      "integrity": "sha512-QaKxh0eNIi2mE9p2vEdzfagOKHCcj1pJ56EEHGQOVxp8r9/iszLUUV7v89x9O1p/T+NlTM5W7jW6+cz4Fq1YVg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/whatwg-url": {
+      "version": "14.2.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-14.2.0.tgz",
+      "integrity": "sha512-De72GdQZzNTUBBChsXueQUnPKDkg/5A5zp7pFDuQAj5UFoENpiACU0wlCvzpAGnTkj++ihpKwKyYewn/XNUbKw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "tr46": "^5.1.0",
+        "webidl-conversions": "^7.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/why-is-node-running": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/ws": {
+      "version": "8.22.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.22.0.tgz",
+      "integrity": "sha512-Ydggc987+RO0AnWtZ/7Wq9FtNvcrL1b/RO0ud9mWjUPgDrsAAwQSF51sm2hm1XofbU/4jkpGEsLFsZZxU+1DOg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/xml-name-validator": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-5.0.0.tgz",
+      "integrity": "sha512-EvGK8EJ3DhaHfbRlETOWAS5pO9MZITeauHKJyb8wyajUfQUenkIg2MvLDTZ4T/TgIcm3HU0TFBgWWboAZ30UHg==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/xmlchars": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
+      "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/yallist": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
diff --git a/canvas/package.json b/canvas/package.json
index 2eb5607..0abe96d 100644
--- a/canvas/package.json
+++ b/canvas/package.json
@@ -6,7 +6,9 @@
   "scripts": {
     "dev": "vite",
     "build": "tsc --noEmit && vite build",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc --noEmit",
+    "test": "vitest run",
+    "test:watch": "vitest"
   },
   "dependencies": {
     "@dagrejs/dagre": "^1.1.4",
@@ -15,10 +17,14 @@
     "reactflow": "^11.11.4"
   },
   "devDependencies": {
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.3",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
     "@vitejs/plugin-react": "^4.3.4",
+    "jsdom": "^25.0.1",
     "typescript": "^5.6.3",
-    "vite": "^5.4.11"
+    "vite": "^5.4.11",
+    "vitest": "^2.1.9"
   }
 }
diff --git a/canvas/src/api.ts b/canvas/src/api.ts
index 7cdc107..ce123c3 100644
--- a/canvas/src/api.ts
+++ b/canvas/src/api.ts
@@ -185,15 +185,43 @@ export interface ImportResult {
 export const importModel = (format: string, content: string, dialect?: string) =>
   post<ImportResult>("/api/import", { format, content, dialect });
 
+/** A semantic diff of an import against the current model (the review view's ModelDiffDoc),
+ *  WITHOUT writing — plus the import's change list + warnings, so the review can apply the
+ *  selected objects afterwards. Powers "review before it lands" for erwin imports. */
+export type ImportPreviewDoc = ModelDiffDoc & {
+  changes: { op: string; payload: Record<string, unknown> }[];
+  warnings: string[];
+};
+
+export const importPreview = (format: string, content: string) =>
+  post<ImportPreviewDoc>("/api/import/preview", { format, content });
+
+/** Fetch import content a host (VS Code) stashed by token — the webview can't read local
+ *  files, so /sme?import=<token> hands off the file this way. One-shot. */
+export const importStashGet = (token: string) =>
+  get<{ ok: boolean; content?: string; error?: string }>(
+    `/api/import/stash/${encodeURIComponent(token)}`,
+  );
+
 /** Apply an imported change list to the working tree as one batch (direct-write
  *  canvas). Each command is sent WITHOUT a fingerprint so the server's stale-model
  *  check is skipped: the guard exists to catch an external edit between a human's
- *  view and their action, not to serialise a machine applying its own batch. */
+ *  view and their action, not to serialise a machine applying its own batch.
+ *
+ *  `tolerateExisting` skips "already exists" errors (idempotent scaffolding): an import
+ *  into an existing model re-emits shared domains / subject areas / categories, and a
+ *  create for one already present is a no-op, not a failure. Any OTHER error still throws. */
 export const applyImportBatch = async (
   changes: { op: string; payload: Record<string, unknown> }[],
+  tolerateExisting = false,
 ) => {
   for (const c of changes) {
-    await sendCommand(c.op, c.payload); // no fingerprint -> no stale-check
+    try {
+      await sendCommand(c.op, c.payload); // no fingerprint -> no stale-check
+    } catch (e) {
+      if (tolerateExisting && e instanceof Error && /already exists/i.test(e.message)) continue;
+      throw e;
+    }
   }
 };
 
diff --git a/canvas/src/sme/DiffView.test.tsx b/canvas/src/sme/DiffView.test.tsx
new file mode 100644
index 0000000..575d23d
--- /dev/null
+++ b/canvas/src/sme/DiffView.test.tsx
@@ -0,0 +1,104 @@
+import { fireEvent, render, screen, within } from "@testing-library/react";
+import { useState } from "react";
+import { describe, expect, it } from "vitest";
+import { makeDiff } from "../test/diffFixture";
+import { DiffView } from "./DiffView";
+import { allFieldKeys, fieldKey, includedUlids, toggleField } from "./reviewModel";
+
+/** The list-pane row for an entity (its name also appears in the detail <h2>, so scope
+ *  to the .rv-list to disambiguate). */
+function listRow(name: string): HTMLElement {
+  const list = document.querySelector(".rv-list") as HTMLElement;
+  return within(list).getByText(name).closest(".rv-obj") as HTMLElement;
+}
+
+/** A host harness mirroring how ReviewScreen would drive per-field selection: it owns the
+ *  field-keyed Set and exposes the derived included ULIDs so a test can assert them. */
+function PerFieldHost() {
+  const diff = makeDiff();
+  const [selected, setSelected] = useState<Set<string>>(() => allFieldKeys(diff));
+  const included = includedUlids(diff, selected);
+  return (
+    <div>
+      <div data-testid="included">{included.sort().join(",")}</div>
+      <DiffView
+        diff={diff}
+        selectable
+        selected={selected}
+        onToggleField={(ulid, field) => setSelected((s) => toggleField(fieldKey(ulid, field), s))}
+      />
+    </div>
+  );
+}
+
+describe("DiffView — filters (view only)", () => {
+  it("shows all changes by default and filters visibility without dropping selection", () => {
+    render(<PerFieldHost />);
+    const list = () => document.querySelector(".rv-list") as HTMLElement;
+    // all four objects present initially
+    expect(within(list()).getByText("counterparty")).toBeInTheDocument();
+    expect(within(list()).getByText("instrument")).toBeInTheDocument();
+    expect(within(list()).getByText("legacy")).toBeInTheDocument();
+
+    // click the Additions filter -> only the added entity is visible in the list
+    fireEvent.click(screen.getByRole("tab", { name: /Additions/ }));
+    expect(within(list()).getByText("instrument")).toBeInTheDocument();
+    expect(within(list()).queryByText("counterparty")).not.toBeInTheDocument();
+    expect(within(list()).queryByText("legacy")).not.toBeInTheDocument();
+
+    // filtering did NOT change selection: everything is still included
+    expect(screen.getByTestId("included")).toHaveTextContent("E_ADD,E_DEL,E_MOD,E_REN");
+
+    // back to All -> everything visible again
+    fireEvent.click(screen.getByRole("tab", { name: /^All/ }));
+    expect(within(list()).getByText("counterparty")).toBeInTheDocument();
+  });
+
+  it("only offers filters that have matches", () => {
+    render(<PerFieldHost />);
+    // the fixture has one of each, so every filter with count>0 shows
+    for (const label of ["All", "Additions", "Modifications", "Renames", "Deletions", "Conflicts"]) {
+      expect(screen.getByRole("tab", { name: new RegExp(label) })).toBeInTheDocument();
+    }
+  });
+});
+
+describe("DiffView — per-field selection", () => {
+  it("unchecking every field of an object excludes it from the action", () => {
+    render(<PerFieldHost />);
+    // focus the modified entity (it has two field changes)
+    fireEvent.click(listRow("counterparty"));
+    // its two per-field checkboxes live in the detail pane
+    const defBox = screen.getByLabelText("include change: definition");
+    const domBox = screen.getByLabelText("include change: domain");
+    expect(defBox).toBeChecked();
+    expect(domBox).toBeChecked();
+
+    // uncheck both -> E_MOD drops out, others stay
+    fireEvent.click(defBox);
+    fireEvent.click(domBox);
+    expect(screen.getByTestId("included")).toHaveTextContent("E_ADD,E_DEL,E_REN");
+    expect(screen.getByTestId("included")).not.toHaveTextContent("E_MOD");
+  });
+
+  it("the object header checkbox reflects a partial (indeterminate) selection", () => {
+    render(<PerFieldHost />);
+    fireEvent.click(listRow("counterparty"));
+    // uncheck ONE field -> the object stays included, header is indeterminate
+    fireEvent.click(screen.getByLabelText("include change: definition"));
+    expect(screen.getByTestId("included")).toHaveTextContent("E_MOD");
+    const row = listRow("counterparty");
+    const header = within(row as HTMLElement).getByRole("checkbox") as HTMLInputElement;
+    expect(header.indeterminate).toBe(true);
+  });
+
+  it("the header checkbox toggles all of an object's fields at once", () => {
+    render(<PerFieldHost />);
+    fireEvent.click(listRow("counterparty"));
+    const row = listRow("counterparty");
+    const header = within(row as HTMLElement).getByRole("checkbox");
+    // header on -> off excludes the whole object
+    fireEvent.click(header);
+    expect(screen.getByTestId("included")).not.toHaveTextContent("E_MOD");
+  });
+});
diff --git a/canvas/src/sme/DiffView.tsx b/canvas/src/sme/DiffView.tsx
index eaeff23..658624c 100644
--- a/canvas/src/sme/DiffView.tsx
+++ b/canvas/src/sme/DiffView.tsx
@@ -1,49 +1,111 @@
 import { useMemo, useState } from "react";
 import type { FieldChangeDoc, ModelDiffDoc, ObjectChangeDoc } from "../types";
+import {
+  type ObjectSelectionState,
+  type ReviewFilter,
+  REVIEW_FILTERS,
+  fieldKey,
+  filterCounts,
+  filterObjects,
+  objectSelectionState,
+} from "./reviewModel";
 
-/** The changed-object list and detail pane (plan §M1/M2).
+/** The changed-object list and detail pane (plan §M1/M2), Phase 1: display FILTERS +
+ * per-FIELD selection.
  *
  * One list of only what changed, grouped by object, each change a plain-language
- * sentence produced server-side (mdl_core.diff builds the label and detail, so
- * the CLI, the PR body and this screen never drift). */
+ * sentence produced server-side (mdl_core.diff builds the label and detail, so the CLI,
+ * the PR body and this screen never drift). Filters are a VIEW concern — they change what
+ * is visible, never what is selected (a hidden change is never silently dropped).
+ *
+ * Selection has two modes, chosen by which callback the host passes:
+ *  - per-FIELD (`onToggleField` / field-keyed `selected`): the new Phase 1 model — each
+ *    change is independently checkable and the object header shows a tri-state.
+ *  - per-OBJECT (`onToggle` / ulid-keyed `selected`): the original propose flow, kept so
+ *    existing callers work unchanged. */
 export function DiffView({
   diff,
   selectable,
   selected,
   onToggle,
+  onToggleField,
 }: {
   diff: ModelDiffDoc;
-  /** per-object checkboxes for selective proposal; off when a create_* is staged */
+  /** show selection checkboxes; off when a create_* is staged */
   selectable?: boolean;
+  /** the selected set — object ULIDs (per-object mode) or field keys (per-field mode) */
   selected?: Set<string>;
+  /** per-OBJECT toggle (original mode). When set, checkboxes are whole-object. */
   onToggle?: (ulid: string) => void;
+  /** per-FIELD toggle (Phase 1). When set, checkboxes are per-field with an object
+   *  tri-state header; takes precedence over onToggle. */
+  onToggleField?: (ulid: string, field: string) => void;
 }) {
+  const [filter, setFilter] = useState<ReviewFilter>("all");
+  const visible = useMemo(() => filterObjects(diff, filter), [diff, filter]);
+  const counts = useMemo(() => filterCounts(diff), [diff]);
   const [focus, setFocus] = useState<string | null>(diff.objects[0]?.ulid ?? null);
   const obj = useMemo(
-    () => diff.objects.find((o) => o.ulid === focus) ?? diff.objects[0] ?? null,
-    [diff, focus],
+    () => visible.find((o) => o.ulid === focus) ?? visible[0] ?? diff.objects[0] ?? null,
+    [visible, diff, focus],
   );
+  const perField = !!onToggleField;
 
   if (!diff.objects.length) {
     return <p className="sme-placeholder">No model changes against {diff.base.label}.</p>;
   }
 
   return (
-    <div className="rv-body">
-      <div className="rv-list">
-        {diff.objects.map((o) => (
-          <ObjectRow
-            key={o.ulid}
-            obj={o}
-            active={o.ulid === (obj?.ulid ?? "")}
-            checked={selected?.has(o.ulid) ?? true}
-            selectable={selectable}
-            onSelect={() => setFocus(o.ulid)}
-            onToggle={() => onToggle?.(o.ulid)}
-          />
-        ))}
+    <div className="rv-wrap">
+      {selectable !== undefined && (
+        <div className="rv-filters" role="tablist" aria-label="Filter changes">
+          {REVIEW_FILTERS.filter((f) => f.id === "all" || counts[f.id] > 0).map((f) => (
+            <button
+              key={f.id}
+              role="tab"
+              aria-selected={filter === f.id}
+              className={"rv-filter" + (filter === f.id ? " active" : "")}
+              onClick={() => setFilter(f.id)}
+            >
+              {f.label}
+              <span className="rv-filter-count">{counts[f.id]}</span>
+            </button>
+          ))}
+        </div>
+      )}
+      <div className="rv-body">
+        <div className="rv-list">
+          {visible.length === 0 ? (
+            <p className="sme-placeholder">No changes match this filter.</p>
+          ) : (
+            visible.map((o) => (
+              <ObjectRow
+                key={o.ulid}
+                obj={o}
+                active={o.ulid === (obj?.ulid ?? "")}
+                selectable={selectable}
+                perField={perField}
+                objState={perField ? objectSelectionState(o, selected ?? new Set()) : undefined}
+                checkedObject={selected?.has(o.ulid) ?? true}
+                onSelect={() => setFocus(o.ulid)}
+                onToggleObject={() => onToggle?.(o.ulid)}
+                onToggleField={onToggleField}
+              />
+            ))
+          )}
+        </div>
+        <div className="rv-detail">
+          {obj && (
+            <Detail
+              obj={obj}
+              selectable={selectable}
+              perField={perField}
+              selected={selected}
+              onToggleField={onToggleField}
+            />
+          )}
+        </div>
       </div>
-      <div className="rv-detail">{obj && <Detail obj={obj} />}</div>
     </div>
   );
 }
@@ -57,27 +119,50 @@ function badge(o: ObjectChangeDoc): string {
 function ObjectRow({
   obj,
   active,
-  checked,
   selectable,
+  perField,
+  objState,
+  checkedObject,
   onSelect,
-  onToggle,
+  onToggleObject,
+  onToggleField,
 }: {
   obj: ObjectChangeDoc;
   active: boolean;
-  checked: boolean;
   selectable?: boolean;
+  perField: boolean;
+  /** the object's tri-state in per-field mode */
+  objState?: ObjectSelectionState;
+  /** whole-object checked, in per-object mode */
+  checkedObject: boolean;
   onSelect: () => void;
-  onToggle: () => void;
+  onToggleObject: () => void;
+  onToggleField?: (ulid: string, field: string) => void;
 }) {
+  // In per-field mode the header checkbox toggles ALL of the object's fields at once, and
+  // shows indeterminate when only some are selected.
+  const setIndeterminate = (el: HTMLInputElement | null) => {
+    if (el && perField) el.indeterminate = objState === "some";
+  };
+  const headerChecked = perField ? objState !== "none" : checkedObject;
+  const toggleHeader = () => {
+    if (!perField) return onToggleObject();
+    // toggle every field key of this object via the field callback
+    for (const f of obj.fields) onToggleField?.(obj.ulid, f.field);
+    for (const c of obj.children) for (const f of c.fields) onToggleField?.(obj.ulid, `${c.ulid}.${f.field}`);
+    if (!obj.fields.length && !obj.children.length) onToggleField?.(obj.ulid, "*");
+  };
+
   return (
     <div className={"rv-obj" + (active ? " active" : "")} onClick={onSelect}>
       <div className="rv-obj-head">
         {selectable && (
           <input
             type="checkbox"
-            checked={checked}
+            ref={setIndeterminate}
+            checked={headerChecked}
             onClick={(e) => e.stopPropagation()}
-            onChange={onToggle}
+            onChange={toggleHeader}
             aria-label={`include ${obj.name_before ?? obj.name_after}`}
           />
         )}
@@ -104,10 +189,38 @@ function ObjectRow({
   );
 }
 
-function Detail({ obj }: { obj: ObjectChangeDoc }) {
+function Detail({
+  obj,
+  selectable,
+  perField,
+  selected,
+  onToggleField,
+}: {
+  obj: ObjectChangeDoc;
+  selectable?: boolean;
+  perField?: boolean;
+  selected?: Set<string>;
+  onToggleField?: (ulid: string, field: string) => void;
+}) {
   const children = obj.children.flatMap((c) =>
-    c.fields.map((f) => ({ field: f, on: c.name_before ?? c.name_after ?? "" })),
+    c.fields.map((f) => ({ field: f, on: c.name_before ?? c.name_after ?? "", key: `${c.ulid}.${f.field}` })),
   );
+  // one selectable row per field, only when the host wired per-field selection
+  const pick = (field: string, node: React.ReactNode) => {
+    if (!selectable || !perField) return node;
+    const key = fieldKey(obj.ulid, field);
+    return (
+      <div className="rv-field-pick">
+        <input
+          type="checkbox"
+          checked={selected?.has(key) ?? true}
+          onChange={() => onToggleField?.(obj.ulid, field)}
+          aria-label={`include change: ${field}`}
+        />
+        <div className="rv-field-body">{node}</div>
+      </div>
+    );
+  };
   return (
     <>
       <h2>
@@ -119,10 +232,10 @@ function Detail({ obj }: { obj: ObjectChangeDoc }) {
         {obj.path && <span className="rv-src"> · {obj.path}</span>}
       </div>
       {obj.fields.map((f, i) => (
-        <FieldDiff key={f.field + i} f={f} />
+        <div key={f.field + i}>{pick(f.field, <FieldDiff f={f} />)}</div>
       ))}
-      {children.map(({ field, on }, i) => (
-        <FieldDiff key={"c" + i} f={field} on={on} />
+      {children.map(({ field, on, key }, i) => (
+        <div key={"c" + i}>{pick(key, <FieldDiff f={field} on={on} />)}</div>
       ))}
       {obj.severity === "breaking" && (
         <div className="rv-note">
diff --git a/canvas/src/sme/ImportExportMenu.tsx b/canvas/src/sme/ImportExportMenu.tsx
index 3b01cb4..ac9a314 100644
--- a/canvas/src/sme/ImportExportMenu.tsx
+++ b/canvas/src/sme/ImportExportMenu.tsx
@@ -1,5 +1,12 @@
 import { useEffect, useRef, useState } from "react";
-import { type ExportFormat, exportUrl, fetchExportFormats, importModel } from "../api";
+import {
+  type ExportFormat,
+  type ImportPreviewDoc,
+  exportUrl,
+  fetchExportFormats,
+  importModel,
+  importPreview,
+} from "../api";
 import type { Exec } from "../exec";
 import "./ImportExportMenu.css";
 
@@ -17,11 +24,17 @@ export function ImportExportMenu({
   buttonClass = "erd-action ghost",
   applyBatch,
   openImport = false,
+  prefillImport = "",
+  onPreview,
 }: {
   exec: Exec;
   canEdit: boolean;
   /** called after a successful import so the shell can jump to the review screen */
   onImported?: (tables: number) => void;
+  /** when set, an erwin import is reviewed before it lands (see ImportPanel.onPreview) */
+  onPreview?: (doc: ImportPreviewDoc) => void;
+  /** pre-fill the import content (a host-stashed .xml) */
+  prefillImport?: string;
   /** the import button's label — "Import & review" in the staged (SME) app, plain
    *  "Import" in the direct-write architect canvas where there is no review screen */
   submitLabel?: string;
@@ -126,6 +139,8 @@ export function ImportExportMenu({
             setOpen(null);
             onImported?.(n);
           }}
+          onPreview={onPreview}
+          prefillImport={prefillImport}
         />
       )}
     </div>
@@ -146,6 +161,8 @@ function ImportPanel({
   applyBatch,
   onClose,
   onImported,
+  onPreview,
+  prefillImport,
 }: {
   exec: Exec;
   submitLabel: string;
@@ -153,14 +170,26 @@ function ImportPanel({
   applyBatch?: (changes: { op: string; payload: Record<string, unknown> }[]) => Promise<unknown>;
   onClose: () => void;
   onImported: (tables: number) => void;
+  /** When set, an erwin import is sent for PRE-WRITE REVIEW instead of being applied: the
+   *  parsed semantic diff is handed up so the host mounts the review screen with an "Apply
+   *  import" action. Absent = apply immediately (today's behaviour / direct-write canvas). */
+  onPreview?: (doc: ImportPreviewDoc) => void;
+  prefillImport?: string;
 }) {
-  const [format, setFormat] = useState("sql");
+  // When opened for pre-write review (onPreview wired), default to erwin — the only format the
+  // review path supports today — so the VS Code "Review Erwin import" flow lands ready to paste.
+  const [format, setFormat] = useState(onPreview ? "erwin" : "sql");
   const [dialect, setDialect] = useState("postgres");
-  const [content, setContent] = useState("");
+  const [content, setContent] = useState(prefillImport ?? "");
   const [busy, setBusy] = useState(false);
   const [error, setError] = useState<string | null>(null);
   const [warnings, setWarnings] = useState<string[]>([]);
 
+  // Host-stashed content (a VS Code .xml) arrives after mount; fill the panel when it does.
+  useEffect(() => {
+    if (prefillImport) setContent(prefillImport);
+  }, [prefillImport]);
+
   const onFile = (f: File | null) => {
     if (!f) return;
     f.text().then(setContent).catch(() => setError("could not read that file"));
@@ -171,6 +200,21 @@ function ImportPanel({
     setError(null);
     setWarnings([]);
     try {
+      // Pre-write review: for an erwin import in the SME app, fetch the semantic diff and hand
+      // it up for review BEFORE anything is written; the review's "Apply import" action does
+      // the write. Other formats / the direct-write canvas keep the apply-now path below.
+      if (onPreview && format === "erwin") {
+        const doc = await importPreview(format, content);
+        if (!doc.changes.length) {
+          setError(doc.warnings[0] ?? "nothing to import from that document");
+          setBusy(false);
+          return;
+        }
+        onClose();
+        onPreview(doc);
+        setBusy(false);
+        return;
+      }
       const res = await importModel(format, content, format === "sql" ? dialect : undefined);
       if (!res.changes.length) {
         setError(res.warnings[0] ?? "nothing to import from that document");
diff --git a/canvas/src/sme/ModelWorkspace.tsx b/canvas/src/sme/ModelWorkspace.tsx
index 911b003..7864c0a 100644
--- a/canvas/src/sme/ModelWorkspace.tsx
+++ b/canvas/src/sme/ModelWorkspace.tsx
@@ -1,5 +1,6 @@
 import { useCallback, useMemo, useRef, useState } from "react";
 import { ReactFlowProvider } from "reactflow";
+import type { ImportPreviewDoc } from "../api";
 import type { Capabilities, Exec } from "../exec";
 import { ModelCanvas, type ModelCanvasHandle } from "../ModelCanvas";
 import { LayersView, OntologyBrowser, type ReadOnlyPanelTab } from "../SidePanel";
@@ -54,6 +55,9 @@ export function ModelWorkspace({
   direct = false,
   onSelectEntity,
   onImported,
+  onImportPreview,
+  openImport = false,
+  prefillImport = "",
   query = "",
   busy,
 }: {
@@ -67,6 +71,12 @@ export function ModelWorkspace({
   onSelectEntity?: (id: string) => void;
   /** after an import stages its changes, jump the shell to the review screen */
   onImported?: (tables: number) => void;
+  /** when set, an erwin import is reviewed before it lands (the shell mounts the review) */
+  onImportPreview?: (doc: ImportPreviewDoc) => void;
+  /** open the import panel on mount (VS Code "Review Erwin import" via /sme?import=1) */
+  openImport?: boolean;
+  /** pre-fill the import panel with this content (a host-stashed .xml via /sme?import=<token>) */
+  prefillImport?: string;
   /** the top-bar search text — highlights matching entities and dims the rest */
   query?: string;
   busy?: boolean;
@@ -242,7 +252,14 @@ export function ModelWorkspace({
           <span className="erd-sep" aria-hidden="true" />
 
           {/* Interchange: move the model in and out of other formats. */}
-          <ImportExportMenu exec={exec} canEdit={canEdit} onImported={onImported} />
+          <ImportExportMenu
+            exec={exec}
+            canEdit={canEdit}
+            onImported={onImported}
+            onPreview={onImportPreview}
+            openImport={openImport}
+            prefillImport={prefillImport}
+          />
           {busy && <span className="erd-busy">updating…</span>}
           {!canEdit && <span className="sme-chip">read-only</span>}
           {error && <span className="erd-error">{error}</span>}
diff --git a/canvas/src/sme/ReviewScreen.tsx b/canvas/src/sme/ReviewScreen.tsx
index ba69336..2313f34 100644
--- a/canvas/src/sme/ReviewScreen.tsx
+++ b/canvas/src/sme/ReviewScreen.tsx
@@ -2,6 +2,7 @@ import { Suspense, lazy, useCallback, useEffect, useState } from "react";
 import { fetchClassification, fetchConflicts, fetchGitContext, fetchModelDiff } from "../api";
 import type { ClassificationDoc, ConflictDoc, GitContext, ModelDiffDoc } from "../types";
 import { DiffView } from "./DiffView";
+import { type ReviewAction, allFieldKeys, includedUlids } from "./reviewModel";
 
 const ModelDiagram = lazy(() =>
   import("./ModelDiagram").then((m) => ({ default: m.ModelDiagram })),
@@ -19,10 +20,14 @@ export function ReviewScreen({
   user,
   onBack,
   onSubmit,
-  /** ULIDs the SME has excluded from this proposal (selective proposal) */
+  /** field keys the SME has excluded from this proposal (per-field selective review) */
   excluded,
-  onToggleObject,
+  onToggleField,
   selectable,
+  /** When set, the review is driven by a source other than propose (e.g. an erwin import):
+   *  the footer shows this action's button, which applies to the SELECTED objects, instead of
+   *  the "Submit for review" propose button. Absent = today's propose flow, unchanged. */
+  action,
 }: {
   stagedDiff?: ModelDiffDoc | null;
   /** route/reviewers/gates for the STAGED set (POST /api/git/classify); the
@@ -31,9 +36,11 @@ export function ReviewScreen({
   user: string;
   onBack: () => void;
   onSubmit: (cl: ClassificationDoc | null) => void;
+  /** excluded (ulid, field) keys; a field not in the set is included */
   excluded: Set<string>;
-  onToggleObject: (ulid: string) => void;
+  onToggleField: (ulid: string, field: string) => void;
   selectable: boolean;
+  action?: ReviewAction;
 }) {
   const [diff, setDiff] = useState<ModelDiffDoc | null>(null);
   const [cl, setCl] = useState<ClassificationDoc | null>(null);
@@ -82,7 +89,8 @@ export function ReviewScreen({
   }
   if (!diff) return <div className="sme-splash">◮ reading your changes…</div>;
 
-  const selected = new Set(diff.objects.map((o) => o.ulid).filter((u) => !excluded.has(u)));
+  // selected = every field key EXCEPT the ones the SME unticked (default: all included)
+  const selected = new Set([...allFieldKeys(diff)].filter((k) => !excluded.has(k)));
 
   return (
     <div className="rv-shell">
@@ -92,7 +100,7 @@ export function ReviewScreen({
           diff={diff}
           selectable={selectable}
           selected={selected}
-          onToggle={onToggleObject}
+          onToggleField={onToggleField}
         />
       ) : (
         <Suspense fallback={<div className="sme-splash">◮ drawing the model…</div>}>
@@ -104,16 +112,27 @@ export function ReviewScreen({
         <ConflictBanner conf={conf} ctx={ctx} />
         <div className="rv-actions">
           <button className="sme-secondary" onClick={onBack}>
-            Keep editing
-          </button>
-          <button
-            className="sme-primary"
-            disabled={!diff.objects.length || (ctx ? !ctx.can_propose : false)}
-            title={ctx && !ctx.can_propose ? "the working tree has uncommitted changes" : ""}
-            onClick={() => onSubmit(cl)}
-          >
-            Submit for review →
+            {action ? "Cancel" : "Keep editing"}
           </button>
+          {action ? (
+            <button
+              className="sme-primary"
+              disabled={!diff.objects.length || !!action.disabledReason}
+              title={action.disabledReason ?? ""}
+              onClick={() => action.apply(includedUlids(diff, selected))}
+            >
+              {action.label}
+            </button>
+          ) : (
+            <button
+              className="sme-primary"
+              disabled={!diff.objects.length || (ctx ? !ctx.can_propose : false)}
+              title={ctx && !ctx.can_propose ? "the working tree has uncommitted changes" : ""}
+              onClick={() => onSubmit(cl)}
+            >
+              Submit for review →
+            </button>
+          )}
         </div>
       </div>
     </div>
diff --git a/canvas/src/sme/SmeApp.tsx b/canvas/src/sme/SmeApp.tsx
index eb98c46..b36b33b 100644
--- a/canvas/src/sme/SmeApp.tsx
+++ b/canvas/src/sme/SmeApp.tsx
@@ -1,9 +1,12 @@
-import { useCallback, useEffect, useMemo, useState } from "react";
+import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import {
+  type ImportPreviewDoc,
+  applyImportBatch,
   classifyStaged,
   fetchGlossary,
   fetchGlossaryConfig,
   fetchModel,
+  importStashGet,
   previewChanges,
   sendCommand,
 } from "../api";
@@ -26,6 +29,7 @@ import { ModelWorkspace } from "./ModelWorkspace";
 import { SubjectAreaEditor } from "./SubjectAreaEditor";
 import { ProposalsList } from "./ProposalsList";
 import { ProposeDialog } from "./ProposeDialog";
+import { allFieldKeys, fieldKey, filterImportChanges, includedEntityNames } from "./reviewModel";
 import { ReviewScreen } from "./ReviewScreen";
 import { TermCard } from "./TermCard";
 import { TermEditor } from "./TermEditor";
@@ -51,13 +55,34 @@ export function SmeApp() {
   const [editing, setEditing] = useState(false);
   const [pending, setPending] = useState<PendingChange[]>([]);
   const [proposeOpen, setProposeOpen] = useState(false);
+  // `?import=1` (VS Code "Review Erwin import") starts on the Model view with the import panel
+  // open, so an erwin import flows straight into the pre-write review. `?import=<token>` (the
+  // host read a local .xml and stashed it) additionally pre-fills the panel with that content.
+  const importParam = useMemo(
+    () => new URLSearchParams(window.location.search).get("import"),
+    [],
+  );
+  const openImport = !!importParam;
+  const importStashToken = importParam && importParam !== "1" ? importParam : null;
+  // content fetched from the host's one-shot stash (when ?import=<token>)
+  const [prefillImport, setPrefillImport] = useState<string>("");
+  useEffect(() => {
+    if (!importStashToken) return;
+    importStashGet(importStashToken)
+      .then((r) => r.ok && r.content && setPrefillImport(r.content))
+      .catch(() => {});
+  }, [importStashToken]);
   // browse | review | proposals. Written to location.hash so a view is linkable
   // (app.py serves sme.html for `sme` and any `sme/...`, so no server change).
   const [view, setView] = useState<"browse" | "model" | "areas" | "review" | "proposals">(
-    window.location.hash === "#proposals" ? "proposals" : "browse",
+    openImport ? "model" : window.location.hash === "#proposals" ? "proposals" : "browse",
   );
   // objects the SME has unticked in the review screen (selective proposal)
   const [excluded, setExcluded] = useState<Set<string>>(new Set());
+  // When an erwin import is being reviewed BEFORE it lands, this holds its preview doc +
+  // change list; the review screen then shows an "Apply import" action instead of propose.
+  // Cleared when the review is left. (Reuses the "review" view, no new route.)
+  const [importReview, setImportReview] = useState<ImportPreviewDoc | null>(null);
   const [user, setUser] = useState(() => localStorage.getItem("mdl.sme.user") ?? "");
   // Server-established identity (spec §17). When the source is proxy or git, the
   // acting user is known and trustworthy — the propose dialog greets them instead
@@ -210,9 +235,17 @@ export function SmeApp() {
   }, []);
 
   // keep the view in step with the hash, so a deep link and the back button work
+  const firstHash = useRef(true);
   useEffect(() => {
     const onHash = () => {
       const h = window.location.hash;
+      // On the very first load with ?import=1 and no hash yet, stay on the Model view (set by
+      // the initializer) so the import panel opens; a hash navigation always wins thereafter.
+      if (firstHash.current && !h && openImport) {
+        firstHash.current = false;
+        return;
+      }
+      firstHash.current = false;
       setView(
         h === "#proposals"
           ? "proposals"
@@ -355,24 +388,53 @@ export function SmeApp() {
 
       {view === "review" ? (
         <ReviewScreen
-          stagedDiff={reviewDiff}
-          stagedRoute={reviewRoute}
+          stagedDiff={importReview ?? reviewDiff}
+          stagedRoute={importReview ? null : reviewRoute}
           user={user}
           selectable={selectable}
           excluded={excluded}
-          onToggleObject={(u) =>
+          onToggleField={(ulid, field) =>
             setExcluded((prev) => {
               const next = new Set(prev);
-              if (next.has(u)) next.delete(u);
-              else next.add(u);
+              const key = fieldKey(ulid, field);
+              if (next.has(key)) next.delete(key);
+              else next.add(key);
               return next;
             })
           }
-          onBack={() => goto("browse")}
+          onBack={() => {
+            setImportReview(null);
+            setExcluded(new Set());
+            goto("browse");
+          }}
           onSubmit={(cl) => {
             setRouteAdvice(cl);
             setProposeOpen(true);
           }}
+          action={
+            importReview
+              ? {
+                  id: "apply-import",
+                  label: "Apply import →",
+                  primary: true,
+                  apply: async () => {
+                    // write only the ENTITIES the reviewer kept ticked (by name — the diff doc
+                    // carries remapped ULIDs, so name is the stable join to the import commands)
+                    const diff = importReview as ModelDiffDoc;
+                    const selected = new Set(
+                      [...allFieldKeys(diff)].filter((k) => !excluded.has(k)),
+                    );
+                    const keepNames = includedEntityNames(diff, selected);
+                    const changes = filterImportChanges(importReview.changes, keepNames);
+                    await applyImportBatch(changes, true); // tolerate shared scaffolding
+                    setImportReview(null);
+                    setExcluded(new Set());
+                    goto("browse");
+                    await fetchModel(subjectArea || undefined).then(setModelDoc);
+                  },
+                }
+              : undefined
+          }
         />
       ) : view === "model" ? (
         // The previewed model when anything is staged, so an edit is visible
@@ -386,6 +448,13 @@ export function SmeApp() {
             canEdit={canEdit}
             direct={direct}
             onImported={() => goto("review")}
+            onImportPreview={(doc) => {
+              setExcluded(new Set());
+              setImportReview(doc);
+              goto("review");
+            }}
+            openImport={openImport}
+            prefillImport={prefillImport}
             query={query}
             busy={staging.busy}
           />
diff --git a/canvas/src/sme/reviewModel.test.ts b/canvas/src/sme/reviewModel.test.ts
new file mode 100644
index 0000000..e6321b4
--- /dev/null
+++ b/canvas/src/sme/reviewModel.test.ts
@@ -0,0 +1,163 @@
+import { describe, expect, it } from "vitest";
+import { makeDiff } from "../test/diffFixture";
+import type { ModelDiffDoc, ObjectChangeDoc } from "../types";
+import {
+  allFieldKeys,
+  fieldKey,
+  filterCounts,
+  filterImportChanges,
+  filterObjects,
+  includedEntityNames,
+  includedUlids,
+  objectFieldKeys,
+  objectIncluded,
+  objectSelectionState,
+  toggleField,
+  toggleObject,
+} from "./reviewModel";
+
+describe("filters (view-only)", () => {
+  const diff = makeDiff();
+
+  it("counts each change category", () => {
+    const c = filterCounts(diff);
+    expect(c.all).toBe(4);
+    expect(c.additions).toBe(1); // E_ADD
+    expect(c.deletions).toBe(1); // E_DEL
+    expect(c.moves).toBe(1); // E_REN
+    expect(c.modifications).toBe(1); // E_MOD (renamed E_REN excluded)
+    expect(c.conflicts).toBe(1); // E_DEL is breaking
+  });
+
+  it("filters the visible list without touching anything else", () => {
+    expect(filterObjects(diff, "additions").map((o) => o.ulid)).toEqual(["E_ADD"]);
+    expect(filterObjects(diff, "conflicts").map((o) => o.ulid)).toEqual(["E_DEL"]);
+    expect(filterObjects(diff, "all")).toHaveLength(4);
+  });
+});
+
+describe("per-field selection", () => {
+  const diff = makeDiff();
+
+  it("gives a modified object one key per field", () => {
+    const mod = diff.objects.find((o) => o.ulid === "E_MOD")!;
+    expect(objectFieldKeys(mod)).toEqual([
+      fieldKey("E_MOD", "definition"),
+      fieldKey("E_MOD", "domain"),
+    ]);
+  });
+
+  it("gives an added object with no field rows a single '*' key", () => {
+    const add = diff.objects.find((o) => o.ulid === "E_ADD")!;
+    expect(objectFieldKeys(add)).toEqual([fieldKey("E_ADD", "*")]);
+  });
+
+  it("derives object state from its selected fields", () => {
+    const mod = diff.objects.find((o) => o.ulid === "E_MOD")!;
+    const [k1, k2] = objectFieldKeys(mod);
+    expect(objectSelectionState(mod, new Set([k1, k2]))).toBe("all");
+    expect(objectSelectionState(mod, new Set([k1]))).toBe("some");
+    expect(objectSelectionState(mod, new Set())).toBe("none");
+    // included when ≥1 field selected
+    expect(objectIncluded(mod, new Set([k1]))).toBe(true);
+    expect(objectIncluded(mod, new Set())).toBe(false);
+  });
+
+  it("toggleField flips one field immutably", () => {
+    const k = fieldKey("E_MOD", "domain");
+    const start = new Set<string>();
+    const on = toggleField(k, start);
+    expect(on.has(k)).toBe(true);
+    expect(start.has(k)).toBe(false); // input untouched
+    expect(toggleField(k, on).has(k)).toBe(false);
+  });
+
+  it("toggleObject turns all fields off when all on, else all on", () => {
+    const mod = diff.objects.find((o) => o.ulid === "E_MOD")!;
+    const keys = objectFieldKeys(mod);
+    const allOn = new Set(keys);
+    expect([...toggleObject(mod, allOn)]).toHaveLength(0); // all -> none
+    const someOn = new Set([keys[0]]);
+    expect(objectSelectionState(mod, toggleObject(mod, someOn))).toBe("all"); // some -> all
+  });
+
+  it("includedUlids reflects field-level exclusion", () => {
+    const all = allFieldKeys(diff);
+    expect(includedUlids(diff, all).sort()).toEqual(["E_ADD", "E_DEL", "E_MOD", "E_REN"]);
+    // deselect both fields of E_MOD -> it drops out, others stay
+    let sel = all;
+    for (const k of objectFieldKeys(diff.objects.find((o) => o.ulid === "E_MOD")!)) {
+      sel = toggleField(k, sel);
+    }
+    expect(includedUlids(diff, sel).sort()).toEqual(["E_ADD", "E_DEL", "E_REN"]);
+  });
+});
+
+describe("import write-filter (apply only the kept entities, by name)", () => {
+  // a minimal import command list like model_to_commands emits
+  const changes = [
+    { op: "create_subject_area", payload: { id: "SA1", name: "Core" } },
+    { op: "create_entity", payload: { id: "e_cp", name: "counterparty" } },
+    { op: "add_attribute", payload: { entity_id: "e_cp", id: "a1", name: "cp_id" } },
+    { op: "create_entity", payload: { id: "e_tr", name: "trade" } },
+    { op: "add_attribute", payload: { entity_id: "e_tr", id: "a2", name: "trade_id" } },
+    { op: "create_relationship", payload: { id: "r1", from_entity: "e_tr", to_entity: "e_cp" } },
+  ];
+
+  it("keeps scaffolding + the kept entity + its attributes; drops the rest", () => {
+    const out = filterImportChanges(changes, new Set(["counterparty"]));
+    const ids = out.map((c) => `${c.op}:${c.payload.id}`);
+    expect(ids).toContain("create_subject_area:SA1");
+    expect(ids).toContain("create_entity:e_cp");
+    expect(ids).toContain("add_attribute:a1"); // counterparty's attr (id a1)
+    // trade and its attribute are dropped
+    expect(ids).not.toContain("create_entity:e_tr");
+    expect(ids).not.toContain("add_attribute:a2");
+    // the relationship references trade (dropped) -> dropped
+    expect(out.some((c) => c.op === "create_relationship")).toBe(false);
+  });
+
+  it("keeps a relationship only when BOTH endpoints are kept", () => {
+    const out = filterImportChanges(changes, new Set(["counterparty", "trade"]));
+    expect(out.some((c) => c.op === "create_relationship")).toBe(true);
+  });
+
+  it("nothing selected writes nothing", () => {
+    expect(filterImportChanges(changes, new Set())).toHaveLength(0);
+  });
+
+  it("includedEntityNames reads kept logical-entity names from the diff", () => {
+    const entity = (ulid: string, name: string): ObjectChangeDoc => ({
+      ulid, object_kind: "logical_entity", object_kind_label: "entity",
+      change: "added", name_before: null, name_after: name, renamed: false,
+      severity: "additive", path: null,
+      fields: [{ field: "*", kind: "added", severity: "additive", label: "", detail: "", before: null, after: null }],
+      children: [],
+    });
+    const diff = {
+      ok: true, base: { ref: "", sha: "", label: "" }, head: { ref: null, label: "" },
+      counts: {}, max_severity: "additive", has_breaking: false,
+      objects: [entity("x", "counterparty"), entity("y", "trade")], config: [],
+    } as unknown as ModelDiffDoc;
+    const all = allFieldKeys(diff);
+    expect([...includedEntityNames(diff, all)].sort()).toEqual(["counterparty", "trade"]);
+  });
+
+  it("includedEntityNames excludes a MODIFIED (already-existing) entity", () => {
+    const obj = (ulid: string, name: string, change: "added" | "modified"): ObjectChangeDoc => ({
+      ulid, object_kind: "logical_entity", object_kind_label: "entity",
+      change, name_before: change === "added" ? null : name, name_after: name, renamed: false,
+      severity: "additive", path: null,
+      fields: [{ field: "*", kind: change, severity: "additive", label: "", detail: "", before: null, after: null }],
+      children: [],
+    });
+    const diff = {
+      ok: true, base: { ref: "", sha: "", label: "" }, head: { ref: null, label: "" },
+      counts: {}, max_severity: "additive", has_breaking: false,
+      objects: [obj("x", "counterparty", "modified"), obj("y", "trade", "added")], config: [],
+    } as unknown as ModelDiffDoc;
+    const all = allFieldKeys(diff);
+    // counterparty already exists (modified) -> not created; only the new entity is kept
+    expect([...includedEntityNames(diff, all)]).toEqual(["trade"]);
+  });
+});
diff --git a/canvas/src/sme/reviewModel.ts b/canvas/src/sme/reviewModel.ts
new file mode 100644
index 0000000..78d0537
--- /dev/null
+++ b/canvas/src/sme/reviewModel.ts
@@ -0,0 +1,203 @@
+// Pure helpers behind the review view: change filtering and per-field selection.
+// Kept out of the component so the semantics are unit-testable on their own.
+
+import type { ChangeType, ModelDiffDoc, ObjectChangeDoc } from "../types";
+
+// The display filters (competitor parity): a VIEW concern only — filtering changes
+// what is visible, never what is selected for the action (so a hidden change can
+// never be silently dropped from a proposal).
+export type ReviewFilter = "all" | "additions" | "modifications" | "moves" | "deletions" | "conflicts";
+
+export const REVIEW_FILTERS: { id: ReviewFilter; label: string }[] = [
+  { id: "all", label: "All" },
+  { id: "additions", label: "Additions" },
+  { id: "modifications", label: "Modifications" },
+  { id: "moves", label: "Renames" },
+  { id: "deletions", label: "Deletions" },
+  { id: "conflicts", label: "Conflicts" },
+];
+
+/** Does an object match the active filter? `conflicts` maps to breaking severity (the
+ *  only conflict signal a 2-way diff carries); `moves` maps to a rename. */
+export function objectMatchesFilter(o: ObjectChangeDoc, f: ReviewFilter): boolean {
+  switch (f) {
+    case "all":
+      return true;
+    case "additions":
+      return o.change === "added";
+    case "deletions":
+      return o.change === "removed";
+    case "moves":
+      return o.renamed;
+    case "modifications":
+      return o.change === "modified" && !o.renamed;
+    case "conflicts":
+      return o.severity === "breaking";
+  }
+}
+
+/** The objects visible under a filter. Selection is untouched — this is view-only. */
+export function filterObjects(diff: ModelDiffDoc, f: ReviewFilter): ObjectChangeDoc[] {
+  return f === "all" ? diff.objects : diff.objects.filter((o) => objectMatchesFilter(o, f));
+}
+
+/** Count per filter, for filter chips that show how many changes each reveals. */
+export function filterCounts(diff: ModelDiffDoc): Record<ReviewFilter, number> {
+  const out = {} as Record<ReviewFilter, number>;
+  for (const { id } of REVIEW_FILTERS) {
+    out[id] = id === "all" ? diff.objects.length : diff.objects.filter((o) => objectMatchesFilter(o, id)).length;
+  }
+  return out;
+}
+
+// --- per-field selection -----------------------------------------------------------
+// Selection is keyed by (object ulid, field). An object is INCLUDED when at least one
+// of its fields is selected; unchecking every field excludes the object. The object
+// header shows a tri-state derived from its fields.
+
+/** The stable key for one field change of one object. A whole-object change (added /
+ *  removed, which carry object-level identity rather than a field) uses the "*" field. */
+export function fieldKey(ulid: string, field: string): string {
+  return `${ulid}\u0000${field}`;
+}
+
+/** Every selectable field key of an object, including its children's fields. An
+ *  added/removed object with no field rows still gets one "*" key so it is selectable. */
+export function objectFieldKeys(o: ObjectChangeDoc): string[] {
+  const keys = o.fields.map((f) => fieldKey(o.ulid, f.field));
+  for (const c of o.children) {
+    for (const f of c.fields) keys.push(fieldKey(o.ulid, `${c.ulid}.${f.field}`));
+  }
+  return keys.length ? keys : [fieldKey(o.ulid, "*")];
+}
+
+export type ObjectSelectionState = "all" | "some" | "none";
+
+/** The tri-state of an object, derived from which of its field keys are selected. */
+export function objectSelectionState(o: ObjectChangeDoc, selected: Set<string>): ObjectSelectionState {
+  const keys = objectFieldKeys(o);
+  const on = keys.filter((k) => selected.has(k)).length;
+  if (on === 0) return "none";
+  if (on === keys.length) return "all";
+  return "some";
+}
+
+/** An object is included in the action when ≥1 of its fields is selected. */
+export function objectIncluded(o: ObjectChangeDoc, selected: Set<string>): boolean {
+  return objectSelectionState(o, selected) !== "none";
+}
+
+/** The ULIDs the action should apply to, given a field-level selection. */
+export function includedUlids(diff: ModelDiffDoc, selected: Set<string>): string[] {
+  return diff.objects.filter((o) => objectIncluded(o, selected)).map((o) => o.ulid);
+}
+
+/** The NEW logical-entity names the reviewer kept, for filtering an import's command list.
+ *  Only `added` entities are returned: the import emits `create_entity` for each entity, which
+ *  fails for one that already exists in the current model (a name-matched "modified" object), so
+ *  an import applies only its genuinely-new entities — a modified existing entity is left as-is
+ *  (shown in the review, not clobbered). Name is the stable join: the diff doc carries remapped
+ *  ULIDs (base's ULID for a name-matched object) while the import commands carry fresh ULIDs. */
+export function includedEntityNames(diff: ModelDiffDoc, selected: Set<string>): Set<string> {
+  const names = new Set<string>();
+  for (const o of diff.objects) {
+    if (o.object_kind !== "logical_entity") continue;
+    if (o.change !== "added") continue; // only new entities can be created by the import
+    if (!objectIncluded(o, selected)) continue;
+    const n = o.name_after ?? o.name_before;
+    if (n) names.add(n);
+  }
+  return names;
+}
+
+type ImportCommand = { op: string; payload: Record<string, unknown> };
+
+/** Filter an erwin import's command list to the entities the reviewer kept (by name).
+ *  Scaffolding ops (subject areas, domains, categories, members) always apply; an entity and
+ *  its attributes apply when the entity's name is kept; a relationship or key group applies
+ *  only when EVERY entity it references is kept. `model_to_commands` emits entities before the
+ *  attributes/relationships that reference them, so a single pass can track which entity ids
+ *  survive. */
+export function filterImportChanges(
+  changes: ImportCommand[],
+  keepNames: Set<string>,
+): ImportCommand[] {
+  if (keepNames.size === 0) return []; // nothing selected -> write nothing
+  const keptEntityIds = new Set<string>(); // import-ULIDs of entities we keep
+  const out: ImportCommand[] = [];
+  const refEntityIds = (p: Record<string, unknown>): string[] =>
+    [p.entity_id, p.from_entity, p.to_entity, p.from, p.to].filter(
+      (v): v is string => typeof v === "string",
+    );
+  for (const c of changes) {
+    const p = c.payload;
+    switch (c.op) {
+      case "create_entity": {
+        const name = typeof p.name === "string" ? p.name : "";
+        const id = typeof p.id === "string" ? p.id : "";
+        if (keepNames.has(name)) {
+          keptEntityIds.add(id);
+          out.push(c);
+        }
+        break;
+      }
+      case "add_attribute": {
+        const eid = typeof p.entity_id === "string" ? p.entity_id : "";
+        if (keptEntityIds.has(eid)) out.push(c);
+        break;
+      }
+      case "create_relationship":
+      case "create_key_group": {
+        const refs = refEntityIds(p);
+        if (refs.length > 0 && refs.every((id) => keptEntityIds.has(id))) out.push(c);
+        break;
+      }
+      default:
+        // scaffolding (create_subject_area, create_domain, create_category,
+        // set_subject_area_members, …) always applies
+        out.push(c);
+    }
+  }
+  return out;
+}
+
+/** All field keys across the whole diff — the initial "everything selected" set. */
+export function allFieldKeys(diff: ModelDiffDoc): Set<string> {
+  const s = new Set<string>();
+  for (const o of diff.objects) for (const k of objectFieldKeys(o)) s.add(k);
+  return s;
+}
+
+/** Toggle every field of an object at once (the header checkbox): if all are on, turn
+ *  them off; otherwise turn them all on. Returns a NEW set (never mutates the input). */
+export function toggleObject(o: ObjectChangeDoc, selected: Set<string>): Set<string> {
+  const next = new Set(selected);
+  const keys = objectFieldKeys(o);
+  const allOn = keys.every((k) => next.has(k));
+  for (const k of keys) {
+    if (allOn) next.delete(k);
+    else next.add(k);
+  }
+  return next;
+}
+
+/** Toggle one field key. Returns a NEW set. */
+export function toggleField(key: string, selected: Set<string>): Set<string> {
+  const next = new Set(selected);
+  if (next.has(key)) next.delete(key);
+  else next.add(key);
+  return next;
+}
+
+// A pluggable action the review view offers (Propose / Accept / Reconcile / Apply
+// import). The view stays source-agnostic; the host wires the label + what apply does.
+export interface ReviewAction {
+  id: string;
+  label: string;
+  primary?: boolean;
+  /** disabled reason, or undefined when enabled */
+  disabledReason?: string;
+  apply: (selectedUlids: string[]) => void;
+}
+
+export type { ChangeType };
diff --git a/canvas/src/sme/sme.css b/canvas/src/sme/sme.css
index 8fb12c9..4cfa000 100644
--- a/canvas/src/sme/sme.css
+++ b/canvas/src/sme/sme.css
@@ -202,10 +202,34 @@ body { font-family: var(--font); background: var(--bg); color: var(--text); }
 }
 .rv-tab.active { background: var(--bg-card); color: var(--text); border-color: var(--border-strong); }
 
+.rv-wrap { flex: 1; display: flex; flex-direction: column; min-height: 0; }
 .rv-body { flex: 1; display: grid; grid-template-columns: 380px 1fr; min-height: 0; }
 .rv-list { border-right: 1px solid var(--border); overflow-y: auto; padding: 10px; }
 .rv-detail { overflow-y: auto; padding: 22px 28px; }
 
+/* display filters — a view concern; change what is visible, not what is selected */
+.rv-filters {
+  display: flex; gap: 4px; flex-wrap: wrap; padding: 8px 10px;
+  border-bottom: 1px solid var(--border);
+}
+.rv-filter {
+  display: inline-flex; align-items: center; gap: 6px;
+  padding: 4px 10px; border-radius: 99px; border: 1px solid var(--border);
+  background: transparent; color: var(--text-dim); cursor: pointer; font-size: 12px;
+}
+.rv-filter:hover { color: var(--text); border-color: var(--border-strong); }
+.rv-filter.active { color: var(--accent); border-color: var(--accent); }
+.rv-filter-count {
+  font-size: 11px; color: var(--text-dim); background: var(--bg-card);
+  border-radius: 99px; padding: 0 6px; min-width: 16px; text-align: center;
+}
+.rv-filter.active .rv-filter-count { color: var(--accent); }
+
+/* per-field selection rows in the detail pane */
+.rv-field-pick { display: flex; gap: 10px; align-items: flex-start; }
+.rv-field-pick > input[type="checkbox"] { margin-top: 16px; accent-color: var(--accent); cursor: pointer; }
+.rv-field-body { flex: 1; min-width: 0; }
+
 /* one changed object */
 .rv-obj {
   border: 1px solid var(--border); border-radius: 10px; margin-bottom: 8px;
diff --git a/canvas/src/test/diffFixture.ts b/canvas/src/test/diffFixture.ts
new file mode 100644
index 0000000..9440402
--- /dev/null
+++ b/canvas/src/test/diffFixture.ts
@@ -0,0 +1,68 @@
+import type { ModelDiffDoc, ObjectChangeDoc } from "../types";
+
+// A realistic ModelDiffDoc with one of each change kind, for the review-view tests.
+// Shapes mirror mdl_core.diff_render.render_json exactly.
+
+function obj(o: Partial<ObjectChangeDoc> & Pick<ObjectChangeDoc, "ulid" | "change">): ObjectChangeDoc {
+  return {
+    object_kind: "logical_entity",
+    object_kind_label: "Entity",
+    name_before: null,
+    name_after: null,
+    renamed: false,
+    severity: "additive",
+    path: null,
+    fields: [],
+    children: [],
+    ...o,
+  };
+}
+
+export function makeDiff(): ModelDiffDoc {
+  return {
+    ok: true,
+    base: { ref: "HEAD", sha: "abc", label: "on disk" },
+    head: { ref: null, label: "your staged changes" },
+    counts: { entities: 4 },
+    max_severity: "breaking",
+    has_breaking: true,
+    config: [],
+    objects: [
+      // a modified entity with TWO field changes (per-field selection target)
+      obj({
+        ulid: "E_MOD",
+        change: "modified",
+        name_before: "counterparty",
+        name_after: "counterparty",
+        severity: "additive",
+        fields: [
+          { field: "definition", kind: "definition_changed", severity: "cosmetic", label: "Definition changed", detail: "", before: "a party", after: "a trading party" },
+          { field: "domain", kind: "attribute_domain_changed", severity: "additive", label: "Domain changed", detail: "", before: "string", after: "text" },
+        ],
+      }),
+      // an added entity (additions filter)
+      obj({ ulid: "E_ADD", change: "added", name_after: "instrument", severity: "additive" }),
+      // a removed entity that BREAKS dbt models (deletions + conflicts filters)
+      obj({
+        ulid: "E_DEL",
+        change: "removed",
+        name_before: "legacy",
+        severity: "breaking",
+        fields: [
+          {
+            field: "entity",
+            kind: "entity_removed",
+            severity: "breaking",
+            label: "Entity removed",
+            detail: "",
+            before: "legacy",
+            after: null,
+            breaks: [{ name: "dim_legacy", target: "snowflake", materialization: "table" }],
+          },
+        ],
+      }),
+      // a renamed entity (moves filter)
+      obj({ ulid: "E_REN", change: "modified", renamed: true, name_before: "old_name", name_after: "new_name", severity: "cosmetic" }),
+    ],
+  };
+}
diff --git a/canvas/src/test/setup.ts b/canvas/src/test/setup.ts
new file mode 100644
index 0000000..f149f27
--- /dev/null
+++ b/canvas/src/test/setup.ts
@@ -0,0 +1 @@
+import "@testing-library/jest-dom/vitest";
diff --git a/canvas/vitest.config.ts b/canvas/vitest.config.ts
new file mode 100644
index 0000000..21450a5
--- /dev/null
+++ b/canvas/vitest.config.ts
@@ -0,0 +1,14 @@
+import react from "@vitejs/plugin-react";
+import { defineConfig } from "vitest/config";
+
+// Component + interaction tests for the canvas (jsdom). Kept separate from the Vite
+// app build; `npm test` runs these headless.
+export default defineConfig({
+  plugins: [react()],
+  test: {
+    environment: "jsdom",
+    globals: true,
+    setupFiles: ["./src/test/setup.ts"],
+    include: ["src/**/*.test.{ts,tsx}"],
+  },
+});
diff --git a/demos/fixtures/sample.erwin.xml b/demos/fixtures/sample.erwin.xml
new file mode 100644
index 0000000..ddc1a1e
--- /dev/null
+++ b/demos/fixtures/sample.erwin.xml
@@ -0,0 +1,108 @@
+<?xml version="1.0"?>
+<erwin xmlns="http://www.erwin.com/dm" FileVersion="9.8.00" Format="erwin">
+  <Model xmlns="http://www.erwin.com/dm/data">
+    <ModelProps><Name>TradingModel</Name></ModelProps>
+    <Domain_Groups>
+      <Domain id="D1"><DomainProps>
+        <Name>id_type</Name><Logical_Data_Type>BIGINT</Logical_Data_Type>
+      </DomainProps></Domain>
+    </Domain_Groups>
+    <UDP_Definition_Groups>
+      <UDP_Definition id="U_STEWARD"><UDP_DefinitionProps>
+        <Name>Steward</Name><Type>Text</Type>
+      </UDP_DefinitionProps></UDP_Definition>
+    </UDP_Definition_Groups>
+    <Naming_Options_Groups>
+      <Naming_Options id="N_PHYS"><Naming_OptionsProps>
+        <Name>Physical</Name><Case_Conversion_Type>UPPER</Case_Conversion_Type>
+        <Is_Physical_Only>1</Is_Physical_Only>
+      </Naming_OptionsProps></Naming_Options>
+      <Naming_Options id="N_LOG"><Naming_OptionsProps>
+        <Name>Logical</Name><Case_Conversion_Type>LOWER</Case_Conversion_Type>
+        <Is_Logical_Only>1</Is_Logical_Only>
+      </Naming_OptionsProps></Naming_Options>
+    </Naming_Options_Groups>
+    <Entity_Groups>
+      <Entity id="E_CP"><EntityProps>
+          <Name>Counterparty</Name><Physical_Name>COUNTERPARTY</Physical_Name>
+          <Definition>A trading partner.</Definition>
+          <UDP_Instance_Groups>
+            <UDP_Instance name="Steward" id="U_STEWARD">Jane Doe</UDP_Instance>
+          </UDP_Instance_Groups>
+        </EntityProps>
+        <Attribute_Groups>
+          <Attribute id="A_CP1"><AttributeProps>
+            <Name>counterparty_id</Name><Parent_Domain_Ref>D1</Parent_Domain_Ref>
+            <Null_Option_Type>Not_Null</Null_Option_Type>
+          </AttributeProps></Attribute>
+          <Attribute id="A_CP2"><AttributeProps>
+            <Name>legal_name</Name><Logical_Data_Type>VARCHAR(255)</Logical_Data_Type>
+            <UDP_Instance_Groups>
+              <UDP_Instance id="U_STEWARD">Bob</UDP_Instance>
+            </UDP_Instance_Groups>
+          </AttributeProps></Attribute>
+        </Attribute_Groups>
+        <Key_Group_Groups>
+          <Key_Group id="K_CP"><Key_GroupProps>
+              <Name>pk_counterparty</Name><Key_Group_Type>Primary_Key</Key_Group_Type>
+            </Key_GroupProps>
+            <Key_Group_Member_Groups>
+              <Key_Group_Member id="KM_CP"><Key_Group_MemberProps>
+                <Attribute_Ref>A_CP1</Attribute_Ref>
+              </Key_Group_MemberProps></Key_Group_Member>
+            </Key_Group_Member_Groups>
+          </Key_Group>
+        </Key_Group_Groups>
+      </Entity>
+      <Entity id="E_TR"><EntityProps><Name>Trade</Name></EntityProps>
+        <Attribute_Groups>
+          <Attribute id="A_TR1"><AttributeProps><Name>trade_id</Name></AttributeProps></Attribute>
+          <Attribute id="A_TR2"><AttributeProps>
+            <Name>counterparty_id</Name>
+            <Parent_Relationship_Ref>R1</Parent_Relationship_Ref>
+            <Parent_Attribute_Ref>A_CP1</Parent_Attribute_Ref>
+          </AttributeProps></Attribute>
+        </Attribute_Groups>
+        <Key_Group_Groups>
+          <Key_Group id="K_TR"><Key_GroupProps>
+            <Name>pk_trade</Name><Key_Group_Type>Primary_Key</Key_Group_Type></Key_GroupProps>
+            <Key_Group_Member_Groups><Key_Group_Member id="KM_TR"><Key_Group_MemberProps>
+              <Attribute_Ref>A_TR1</Attribute_Ref>
+            </Key_Group_MemberProps></Key_Group_Member></Key_Group_Member_Groups>
+          </Key_Group>
+        </Key_Group_Groups>
+      </Entity>
+      <Entity id="E_INST"><EntityProps><Name>Institution</Name></EntityProps>
+        <Attribute_Groups><Attribute id="A_INST1"><AttributeProps>
+          <Name>counterparty_id</Name>
+        </AttributeProps></Attribute></Attribute_Groups>
+      </Entity>
+    </Entity_Groups>
+    <Relationship_Groups>
+      <Relationship id="R1"><RelationshipProps>
+        <Name>trade_has_counterparty</Name>
+        <Parent_Entity_Ref>E_CP</Parent_Entity_Ref><Child_Entity_Ref>E_TR</Child_Entity_Ref>
+        <Cardinality>Zero_One_or_More</Cardinality>
+        <Parent_To_Child_Verb_Phrase>is party to</Parent_To_Child_Verb_Phrase>
+        <Child_To_Parent_Verb_Phrase>is with</Child_To_Parent_Verb_Phrase>
+      </RelationshipProps></Relationship>
+      <Relationship id="R2"><RelationshipProps>
+        <Name>cpty_is_institution</Name><Type>Subtype_Complete</Type>
+        <Parent_Entity_Ref>E_CP</Parent_Entity_Ref><Child_Entity_Ref>E_INST</Child_Entity_Ref>
+        <Subtype_Discriminator_Ref>A_CP2</Subtype_Discriminator_Ref>
+      </RelationshipProps></Relationship>
+    </Relationship_Groups>
+    <Subject_Area_Groups>
+      <Subject_Area id="S1"><Subject_AreaProps>
+        <Name>Trading</Name>
+        <User_Attached_Objects_Ref_Array>
+          <User_Attached_Objects_Ref index="0">E_CP</User_Attached_Objects_Ref>
+          <User_Attached_Objects_Ref index="1">E_TR</User_Attached_Objects_Ref>
+        </User_Attached_Objects_Ref_Array>
+      </Subject_AreaProps></Subject_Area>
+    </Subject_Area_Groups>
+    <View_Groups><View id="V1"><ViewProps><Name>v_active_trades</Name></ViewProps></View></View_Groups>
+    <ER_Diagram_Groups><ER_Diagram id="ERD1"><ER_DiagramProps>
+      <Name>Main</Name></ER_DiagramProps></ER_Diagram></ER_Diagram_Groups>
+  </Model>
+</erwin>
diff --git a/packages/cli/src/mdl_cli/main.py b/packages/cli/src/mdl_cli/main.py
index 7b2373b..cb614a4 100644
--- a/packages/cli/src/mdl_cli/main.py
+++ b/packages/cli/src/mdl_cli/main.py
@@ -3158,6 +3158,31 @@ def model_detail(
     typer.echo(json.dumps(entities_detail(_load(model_dir).model, limit=limit), default=str))
 
 
+@model_app.command("tree")
+def model_tree_cmd(
+    model_dir: Path = typer.Option(Path("."), "--model-dir", "-m"),
+    subject_area: str = typer.Option(None, "--subject-area", help="Scope by area name or ULID"),
+    fmt: str = typer.Option("json", "--format", help="json (the VS Code Model tree consumes it)"),
+) -> None:
+    """A navigable tree of the logical model — every entity with its attributes and the
+    source file each lives in — for an editor's Model Explorer (entity → attributes, click
+    to open the YAML). Uncapped, unlike `model detail`. `--format json` is what the VS Code
+    Model tree consumes."""
+    from mdl_core.query import model_tree
+
+    repo = _load(model_dir)
+    tree = model_tree(repo.model, path_for=repo.path_for_ulid, subject_area=subject_area)
+    if fmt == "json":
+        typer.echo(json.dumps(tree, default=str))
+        return
+    # a terse text fallback for the terminal
+    for e in tree["entities"]:
+        typer.secho(e["name"], fg=typer.colors.CYAN)
+        for a in e["attributes"]:
+            key = " (pk)" if a["is_pk"] else ""
+            typer.echo(f"    {a['name']}: {a['domain']}{key}")
+
+
 @app.command()
 def mcp(
     repo: Path = typer.Option(
diff --git a/packages/cli/tests/test_model_tree_cli.py b/packages/cli/tests/test_model_tree_cli.py
new file mode 100644
index 0000000..c23b206
--- /dev/null
+++ b/packages/cli/tests/test_model_tree_cli.py
@@ -0,0 +1,57 @@
+"""CLI: `mdl model tree` — the JSON the VS Code Model Explorer consumes (entity →
+attributes, with a source file per entity for click-to-open)."""
+
+from __future__ import annotations
+
+import json
+
+from typer.testing import CliRunner
+
+from mdl_cli.main import app
+
+runner = CliRunner()
+
+
+def _demo(tmp_path):
+    d = tmp_path / "proj"
+    assert runner.invoke(app, ["init", "--demo", str(d)]).exit_code == 0
+    return d / "model"
+
+
+def test_model_tree_json_shape(tmp_path):
+    model = _demo(tmp_path)
+    r = runner.invoke(app, ["model", "tree", "-m", str(model), "--format", "json"])
+    assert r.exit_code == 0, r.output
+    tree = json.loads(r.stdout)
+    assert "entities" in tree and tree["entities"]
+    e = tree["entities"][0]
+    assert {"name", "attributes", "file"} <= set(e)
+    assert isinstance(e["attributes"], list)
+
+
+def test_model_tree_files_resolve_on_disk(tmp_path):
+    # every entity's `file` must be a real path relative to the model dir — this is the
+    # exact path the extension opens when a user clicks an entity in the tree.
+    model = _demo(tmp_path)
+    tree = json.loads(runner.invoke(app, ["model", "tree", "-m", str(model)]).stdout)
+    for e in tree["entities"]:
+        assert e["file"], f"{e['name']} has no source file"
+        assert (model / e["file"]).exists(), f"{e['file']} does not exist"
+
+
+def test_model_tree_attributes_have_pk_flag(tmp_path):
+    model = _demo(tmp_path)
+    tree = json.loads(runner.invoke(app, ["model", "tree", "-m", str(model)]).stdout)
+    # at least one entity should have a pk attribute (the demo has keyed entities)
+    all_attrs = [a for e in tree["entities"] for a in e["attributes"]]
+    assert any(a["is_pk"] for a in all_attrs)
+    # every attribute carries the fields the tree renders
+    for a in all_attrs:
+        assert {"name", "domain", "role", "nullable", "is_pk"} <= set(a)
+
+
+def test_model_tree_text_format(tmp_path):
+    model = _demo(tmp_path)
+    r = runner.invoke(app, ["model", "tree", "-m", str(model), "--format", "text"])
+    assert r.exit_code == 0, r.output
+    assert "(pk)" in r.output  # the text fallback marks primary keys
diff --git a/packages/core/src/mdl_core/diff.py b/packages/core/src/mdl_core/diff.py
index 83b4eba..0bbd133 100644
--- a/packages/core/src/mdl_core/diff.py
+++ b/packages/core/src/mdl_core/diff.py
@@ -565,6 +565,16 @@ def diff_models_by_name(
     relationships and key groups by name), then delegates to the unchanged `diff_models`
     — so all the classification, severity and rendering are reused. Head-only names keep
     their own ULIDs and show as added; base-only names show as removed."""
+    head = remap_head_by_name(base, head)
+    return diff_models(base, head, base_label=base_label, head_label=head_label)
+
+
+def remap_head_by_name(base: Model, head: Model) -> Model:
+    """Return a COPY of `head` whose ULIDs are rewritten to `base`'s ULID for every same-named
+    object, so the two models can be diffed (or enriched) by shared ULID. This is the name-match
+    step behind `diff_models_by_name`, exposed so a caller that needs both the diff AND the
+    remapped head (e.g. the server's import-preview, which runs break-impact enrichment against
+    the head using the diff doc's ULIDs) can share one remapping instead of duplicating it."""
     import copy
 
     head = copy.deepcopy(head)
@@ -594,7 +604,7 @@ def diff_models_by_name(
                 remap[a.id] = base_attr[key]
 
     _apply_remap(head, remap)
-    return diff_models(base, head, base_label=base_label, head_label=head_label)
+    return head
 
 
 def _apply_remap(model: Model, remap: dict[str, str]) -> None:
diff --git a/packages/core/src/mdl_core/query.py b/packages/core/src/mdl_core/query.py
index 6461c9b..c49202f 100644
--- a/packages/core/src/mdl_core/query.py
+++ b/packages/core/src/mdl_core/query.py
@@ -274,3 +274,66 @@ def _resolve_subject_area_id(model: Model, ref: str) -> str | None:
         if sa.name.lower() == lref:
             return sa.id
     return None
+
+
+def model_tree(
+    model: Model,
+    *,
+    path_for=None,
+    subject_area: str | None = None,
+) -> dict:
+    """A navigable tree of the LOGICAL model for an editor's Model Explorer: every entity
+    with its attributes and each object's source file. Unlike `list_entities` (counts
+    only) and `entities_detail` (chat-sized, capped), this is the full, uncapped structure
+    a tree view drills into, and it carries the source file per entity so a click can open
+    the YAML. `path_for(ulid) -> rel path | None` is threaded in by the CLI (the file map
+    lives on ModelRepo, not on the pure Model); when absent, `file` is null.
+
+    Each entity: name, physical_name, subject_area, definition, pattern, file, and
+    attributes (name, physical_name, domain, role, nullable, is_pk). Attributes keep their
+    authored order. `is_pk` is true when the attribute is a member of a pk KeyGroup or,
+    failing a declared pk, carries the legacy `role: business_key`.
+    """
+    # A requested-but-unknown area resolves to None; scope to NOTHING rather than
+    # silently ignoring the filter (which would show the whole model).
+    want_scope = subject_area is not None
+    sa_id = _resolve_subject_area_id(model, subject_area) if want_scope else None
+    sa_name = {sa.id: sa.name for sa in model.subject_areas.values()}
+    ce_sa = {ce.id: ce.subject_area for ce in model.conceptual_entities.values()}
+
+    entities: list[dict] = []
+    for le in sorted(model.logical_entities.values(), key=lambda e: e.name):
+        area_id = ce_sa.get(le.realises) if le.realises else None
+        if want_scope and area_id != sa_id:
+            continue
+        # pk membership: declared pk KeyGroup members, else legacy business_key attrs
+        pk_ids: set[str] = set()
+        declared_pk = False
+        for kg in model.key_groups.values():
+            if kg.entity == le.id and kg.type == "pk":
+                declared_pk = True
+                pk_ids.update(kg.members)
+        attributes = [
+            {
+                "name": a.name,
+                "physical_name": a.physical_name,
+                "domain": a.domain,
+                "role": a.role,
+                "nullable": a.nullable,
+                "is_pk": (a.id in pk_ids) if declared_pk else (a.role == "business_key"),
+            }
+            for a in le.attributes
+        ]
+        entities.append(
+            {
+                "name": le.name,
+                "physical_name": le.physical_name,
+                "subject_area": sa_name.get(area_id) if area_id else None,
+                "definition": le.definition,
+                "pattern": le.pattern,
+                "file": path_for(le.id) if path_for else None,
+                "attributes": attributes,
+            }
+        )
+
+    return {"project": model.config.name, "entities": entities}
diff --git a/packages/core/tests/test_model_tree.py b/packages/core/tests/test_model_tree.py
new file mode 100644
index 0000000..6c351a8
--- /dev/null
+++ b/packages/core/tests/test_model_tree.py
@@ -0,0 +1,58 @@
+"""The model_tree query — the navigable entity→attribute structure the VS Code Model
+Explorer drills into, with the source file per entity for click-to-open."""
+
+from __future__ import annotations
+
+from mdl_core.query import model_tree
+from mdl_core.repo import ModelRepo
+
+
+def _repo(model_dir):
+    return ModelRepo.load(model_dir)
+
+
+def test_model_tree_entities_and_attributes(model_dir):
+    repo = _repo(model_dir)
+    tree = model_tree(repo.model, path_for=repo.path_for_ulid)
+    by_name = {e["name"]: e for e in tree["entities"]}
+    assert {"counterparty", "trade"} <= set(by_name)
+
+    cp = by_name["counterparty"]
+    attr_names = [a["name"] for a in cp["attributes"]]
+    # attributes keep their authored order
+    assert attr_names == ["counterparty_id", "legal_name"]
+
+
+def test_model_tree_marks_primary_key(model_dir):
+    tree = model_tree(_repo(model_dir).model, path_for=_repo(model_dir).path_for_ulid)
+    cp = next(e for e in tree["entities"] if e["name"] == "counterparty")
+    pk = next(a for a in cp["attributes"] if a["name"] == "counterparty_id")
+    other = next(a for a in cp["attributes"] if a["name"] == "legal_name")
+    # counterparty_id is a business_key → is_pk; legal_name is not
+    assert pk["is_pk"] is True
+    assert other["is_pk"] is False
+    assert other["role"] == "attribute"
+
+
+def test_model_tree_carries_source_file_that_exists(model_dir):
+    # the `file` per entity is what a click opens; it must be a real relative path on disk
+    repo = _repo(model_dir)
+    tree = model_tree(repo.model, path_for=repo.path_for_ulid)
+    cp = next(e for e in tree["entities"] if e["name"] == "counterparty")
+    assert cp["file"] == "logical/entities/counterparty.yaml"
+    assert (model_dir / cp["file"]).exists()
+
+
+def test_model_tree_without_path_for_has_null_file(model_dir):
+    # pure Model (no ModelRepo file map) → file is null, never crashes
+    tree = model_tree(_repo(model_dir).model)
+    assert all(e["file"] is None for e in tree["entities"])
+
+
+def test_model_tree_scopes_to_subject_area(model_dir):
+    repo = _repo(model_dir)
+    # both fixture entities are homed in Trading; an unknown area scopes to nothing
+    scoped = model_tree(repo.model, path_for=repo.path_for_ulid, subject_area="Trading")
+    assert scoped["entities"]
+    empty = model_tree(repo.model, subject_area="no-such-area")
+    assert empty["entities"] == []
diff --git a/packages/server/src/mdl_server/app.py b/packages/server/src/mdl_server/app.py
index 8eb043c..9b12e05 100644
--- a/packages/server/src/mdl_server/app.py
+++ b/packages/server/src/mdl_server/app.py
@@ -81,6 +81,10 @@ def create_app(
     model_dir = Path(model_dir)
     app = FastAPI(title="Modelith", docs_url="/api/docs", openapi_url="/api/openapi.json")
     cache: dict = {"fingerprint": None, "repo": None}
+    # One-shot in-memory stash for import content handed from a host (VS Code reads a local
+    # .xml and POSTs it here; the canvas webview, which cannot read local files, fetches it by
+    # token). Consumed on read; this is a convenience channel, not durable state.
+    import_stash: dict[str, str] = {}
 
     # Identity is resolved per request from a trusted-proxy header (enterprise) or the
     # model dir's git config (solo), or falls back to anonymous — see identity.py. The
@@ -260,6 +264,73 @@ def import_model(body: dict) -> JSONResponse:
             }
         )
 
+    @app.post("/api/import/stash")
+    def import_stash_put(body: dict) -> JSONResponse:
+        """Stash import content (e.g. an erwin XML a VS Code host read from disk) and return a
+        one-shot token. The canvas opens /sme?import=<token> and fetches it below — the webview
+        itself cannot read the host's filesystem."""
+        import secrets
+
+        content = body.get("content", "")
+        if not content:
+            return JSONResponse({"ok": False, "error": "content is empty"}, status_code=422)
+        token = secrets.token_urlsafe(12)
+        import_stash[token] = content
+        # cap the stash so a long-lived server can't accumulate; this is a transient handoff
+        if len(import_stash) > 32:
+            for k in list(import_stash)[:-16]:
+                import_stash.pop(k, None)
+        return JSONResponse({"ok": True, "token": token})
+
+    @app.get("/api/import/stash/{token}")
+    def import_stash_get(token: str) -> JSONResponse:
+        """Consume a stashed import content by token (one-shot)."""
+        content = import_stash.pop(token, None)
+        if content is None:
+            return JSONResponse({"ok": False, "error": "unknown or expired token"}, status_code=404)
+        return JSONResponse({"ok": True, "content": content})
+
+    @app.post("/api/import/preview")
+    def import_preview(body: dict) -> JSONResponse:
+        """Parse an import and return a SEMANTIC DIFF of it against the current model, WITHOUT
+        writing anything — so the change can be reviewed (filters, per-field selection, break
+        impact) before it lands. Returns the ModelDiffDoc shape (as /api/git/diff/model does)
+        plus the import's `changes` and `warnings`, so the client can apply the selected
+        objects afterwards without re-parsing. Erwin only for now (the flagship migration);
+        other formats 422 until wired."""
+        from mdl_emit_erd.imports.model import model_to_commands
+
+        from mdl_core.diff import diff_models, remap_head_by_name
+        from mdl_core.diff_render import render_json
+        from mdl_server.git_api import _attach_breaks, _attach_paths
+
+        fmt = body.get("format", "")
+        content = body.get("content", "")
+        if not content:
+            return JSONResponse({"ok": False, "error": "content is empty"}, status_code=422)
+        if fmt != "erwin":
+            return JSONResponse(
+                {"ok": False, "error": f"import preview supports erwin only (got {fmt!r})"},
+                status_code=422,
+            )
+        from mdl_reverse.erwin import import_erwin
+
+        result = import_erwin(content)
+        current = _load().model
+        # Imported ULIDs are fresh, so match by NAME; keep the remapped head to enrich break
+        # impact against the same ULIDs the diff doc carries.
+        head = remap_head_by_name(current, result.model)
+        diff = diff_models(current, head, base_label="current", head_label="import")
+        doc = render_json(diff)
+        doc["ok"] = True
+        doc["base"] = {"ref": "current", "sha": "", "label": "current model"}
+        doc["head"] = {"ref": None, "label": "erwin import"}
+        _attach_paths(model_dir, doc)
+        _attach_breaks(head, doc)
+        doc["changes"] = model_to_commands(result.model)
+        doc["warnings"] = result.warnings
+        return JSONResponse(doc)
+
     @app.get("/api/entities/{ulid}")
     def get_entity(ulid: str) -> JSONResponse:
         repo = _load()
diff --git a/packages/server/src/mdl_server/static/assets/ModelDiagram-oAb1enKe.js b/packages/server/src/mdl_server/static/assets/ModelDiagram-CRUBpPVn.js
similarity index 83%
rename from packages/server/src/mdl_server/static/assets/ModelDiagram-oAb1enKe.js
rename to packages/server/src/mdl_server/static/assets/ModelDiagram-CRUBpPVn.js
index 26d3511..2d6de82 100644
--- a/packages/server/src/mdl_server/static/assets/ModelDiagram-oAb1enKe.js
+++ b/packages/server/src/mdl_server/static/assets/ModelDiagram-CRUBpPVn.js
@@ -1 +1 @@
-import{r,j as s}from"./client-DOmNpTln.js";import{f as T,t as _,u as O,v as R,E as D,B as P,C as z,w as A}from"./styles-BtrhR1xb.js";const V={entity:D},$={relationship:R},l={breaking:"#f87171",additive:"#34d399",cosmetic:"#fcd34d"},N=["#5eead4","#fcd34d","#a78bfa","#fb923c","#38bdf8","#f472b6","#a3e635"],d="#64748b";function Y({subjectArea:u,severityByUlid:a,focusUlid:m,onSelect:c}){const[t,g]=r.useState(null),[f,w]=r.useState(null),[h,E]=r.useState(!0);r.useEffect(()=>{g(null),T(u).then(g).catch(n=>w(String(n)))},[u]);const{nodes:k,edges:M}=r.useMemo(()=>{if(!t)return{nodes:[],edges:[]};const n=new Map;t.subject_areas.forEach(e=>{let o=2166136261;for(let i=0;i<e.id.length;i++)o=Math.imul(o^e.id.charCodeAt(i),16777619);n.set(e.id,N[Math.abs(o)%N.length])});const p=new Map(t.entities.map(e=>[e.id,e])),b=a&&a.size>0,C=t.entities.map(e=>{var j;const o=(a==null?void 0:a.get(e.id))??(e.conceptual?a==null?void 0:a.get(e.conceptual.id):void 0),i=b?o?l[o]??d:d:(j=e.conceptual)!=null&&j.subject_area?n.get(e.conceptual.subject_area.id)??d:d;return{id:e.id,type:"entity",position:{x:0,y:0},data:{entity:e,color:i,dimmed:!!(b&&!o),highlighted:e.id===m,showTypes:h}}}),x=t.relationships.map(e=>({id:e.id,source:e.from.entity,target:e.to.entity,type:"relationship",data:{relationship:e,dimmed:!1}}));return{nodes:_(C,x,p),edges:x}},[t,a,m,h]);return f?s.jsx("p",{className:"sme-splash error",children:f}):t?t.entities.length?s.jsxs("div",{className:"erd-wrap",children:[s.jsxs("div",{className:"erd-bar",children:[s.jsxs("span",{className:"erd-count",children:[t.entities.length," entities · ",t.relationships.length," relationships",t.scope&&" · scoped"]}),s.jsxs("label",{className:"erd-toggle",children:[s.jsx("input",{type:"checkbox",checked:h,onChange:n=>E(n.target.checked)}),"show types"]}),a&&a.size>0&&s.jsxs("span",{className:"erd-legend",children:[s.jsx("span",{className:"sw",style:{background:l.breaking}})," breaking",s.jsx("span",{className:"sw",style:{background:l.additive}})," added",s.jsx("span",{className:"sw",style:{background:l.cosmetic}})," changed",s.jsx("span",{className:"sw",style:{background:d}})," unchanged"]})]}),s.jsx("div",{className:"erd-canvas",children:s.jsxs(O,{nodes:k,edges:M,nodeTypes:V,edgeTypes:$,fitView:!0,minZoom:.1,nodesConnectable:!1,onNodeClick:(n,p)=>c==null?void 0:c(p.id),onPaneClick:()=>c==null?void 0:c(null),onlyRenderVisibleElements:!0,proOptions:{hideAttribution:!0},children:[s.jsx(P,{gap:16,color:"#1f2937"}),s.jsx(z,{showInteractive:!1}),s.jsx(A,{pannable:!0,zoomable:!0})]})})]}):s.jsx("p",{className:"sme-placeholder",children:"Nothing to draw — this subject area has no entities in it yet."}):s.jsx("div",{className:"sme-splash",children:"◮ drawing the model…"})}export{Y as ModelDiagram};
+import{r,j as s}from"./client-DOmNpTln.js";import{f as T,u as _,v as O,w as R,E as D,B as P,C as z,x as A}from"./styles-B90OKxCj.js";const V={entity:D},$={relationship:R},l={breaking:"#f87171",additive:"#34d399",cosmetic:"#fcd34d"},N=["#5eead4","#fcd34d","#a78bfa","#fb923c","#38bdf8","#f472b6","#a3e635"],d="#64748b";function Y({subjectArea:u,severityByUlid:a,focusUlid:m,onSelect:c}){const[t,g]=r.useState(null),[f,w]=r.useState(null),[h,E]=r.useState(!0);r.useEffect(()=>{g(null),T(u).then(g).catch(n=>w(String(n)))},[u]);const{nodes:k,edges:M}=r.useMemo(()=>{if(!t)return{nodes:[],edges:[]};const n=new Map;t.subject_areas.forEach(e=>{let o=2166136261;for(let i=0;i<e.id.length;i++)o=Math.imul(o^e.id.charCodeAt(i),16777619);n.set(e.id,N[Math.abs(o)%N.length])});const p=new Map(t.entities.map(e=>[e.id,e])),x=a&&a.size>0,C=t.entities.map(e=>{var j;const o=(a==null?void 0:a.get(e.id))??(e.conceptual?a==null?void 0:a.get(e.conceptual.id):void 0),i=x?o?l[o]??d:d:(j=e.conceptual)!=null&&j.subject_area?n.get(e.conceptual.subject_area.id)??d:d;return{id:e.id,type:"entity",position:{x:0,y:0},data:{entity:e,color:i,dimmed:!!(x&&!o),highlighted:e.id===m,showTypes:h}}}),b=t.relationships.map(e=>({id:e.id,source:e.from.entity,target:e.to.entity,type:"relationship",data:{relationship:e,dimmed:!1}}));return{nodes:_(C,b,p),edges:b}},[t,a,m,h]);return f?s.jsx("p",{className:"sme-splash error",children:f}):t?t.entities.length?s.jsxs("div",{className:"erd-wrap",children:[s.jsxs("div",{className:"erd-bar",children:[s.jsxs("span",{className:"erd-count",children:[t.entities.length," entities · ",t.relationships.length," relationships",t.scope&&" · scoped"]}),s.jsxs("label",{className:"erd-toggle",children:[s.jsx("input",{type:"checkbox",checked:h,onChange:n=>E(n.target.checked)}),"show types"]}),a&&a.size>0&&s.jsxs("span",{className:"erd-legend",children:[s.jsx("span",{className:"sw",style:{background:l.breaking}})," breaking",s.jsx("span",{className:"sw",style:{background:l.additive}})," added",s.jsx("span",{className:"sw",style:{background:l.cosmetic}})," changed",s.jsx("span",{className:"sw",style:{background:d}})," unchanged"]})]}),s.jsx("div",{className:"erd-canvas",children:s.jsxs(O,{nodes:k,edges:M,nodeTypes:V,edgeTypes:$,fitView:!0,minZoom:.1,nodesConnectable:!1,onNodeClick:(n,p)=>c==null?void 0:c(p.id),onPaneClick:()=>c==null?void 0:c(null),onlyRenderVisibleElements:!0,proOptions:{hideAttribution:!0},children:[s.jsx(P,{gap:16,color:"#1f2937"}),s.jsx(z,{showInteractive:!1}),s.jsx(A,{pannable:!0,zoomable:!0})]})})]}):s.jsx("p",{className:"sme-placeholder",children:"Nothing to draw — this subject area has no entities in it yet."}):s.jsx("div",{className:"sme-splash",children:"◮ drawing the model…"})}export{Y as ModelDiagram};
diff --git a/packages/server/src/mdl_server/static/assets/main-DgsUduj_.js b/packages/server/src/mdl_server/static/assets/main-DScWOCuj.js
similarity index 99%
rename from packages/server/src/mdl_server/static/assets/main-DgsUduj_.js
rename to packages/server/src/mdl_server/static/assets/main-DScWOCuj.js
index 53d918f..08556aa 100644
--- a/packages/server/src/mdl_server/static/assets/main-DgsUduj_.js
+++ b/packages/server/src/mdl_server/static/assets/main-DScWOCuj.js
@@ -1,2 +1,2 @@
-import{j as e,r as a,c as ie,R as oe}from"./client-DOmNpTln.js";import{I as le,R as de,P as Y,f as J,a as Z,g as ee,s as he,A as ue,b as xe,M as je,S as pe}from"./styles-BtrhR1xb.js";function me(s){return{canEdit:!s,mode:"direct",canArbitrate:!s,canCommit:!s}}function l({size:s=16,children:i}){return e.jsx("svg",{width:s,height:s,viewBox:"0 0 24 24",fill:"none",stroke:"currentColor",strokeWidth:1.7,strokeLinecap:"round",strokeLinejoin:"round","aria-hidden":"true",focusable:"false",children:i})}const fe=s=>e.jsx(l,{...s,children:e.jsx("path",{d:"M12 5v14M5 12h14"})}),ge=s=>e.jsx(l,{...s,children:e.jsx("path",{d:"M12 3l7.5 4.5v9L12 21l-7.5-4.5v-9L12 3z"})}),ye=s=>e.jsxs(l,{...s,children:[e.jsx("path",{d:"M12 3l9 5-9 5-9-5 9-5z"}),e.jsx("path",{d:"M3 12l9 5 9-5"}),e.jsx("path",{d:"M3 16l9 5 9-5"})]}),be=s=>e.jsxs(l,{...s,children:[e.jsx("circle",{cx:"6",cy:"6",r:"2.4"}),e.jsx("circle",{cx:"6",cy:"18",r:"2.4"}),e.jsx("circle",{cx:"18",cy:"18",r:"2.4"}),e.jsx("path",{d:"M6 8.4v7.2M8.4 6H14a3 3 0 0 1 3 3v6.6"})]}),we=s=>e.jsxs(l,{...s,children:[e.jsx("path",{d:"M12 4v16M6 8h12"}),e.jsx("path",{d:"M6 8l-2.5 5a2.5 2.5 0 0 0 5 0L6 8zM18 8l-2.5 5a2.5 2.5 0 0 0 5 0L18 8z"}),e.jsx("path",{d:"M9 20h6"})]}),ve=s=>e.jsx(l,{...s,children:e.jsx("path",{d:"M8 7l-4 5 4 5M16 7l4 5-4 5"})}),Me=s=>e.jsxs(l,{...s,children:[e.jsx("path",{d:"M8 8l4-4 4 4M8 16l4 4 4-4"}),e.jsx("path",{d:"M4 12h16"})]}),Ce=s=>e.jsxs(l,{...s,children:[e.jsx("rect",{x:"3",y:"4",width:"7",height:"7",rx:"1"}),e.jsx("rect",{x:"14",y:"4",width:"7",height:"7",rx:"1"}),e.jsx("rect",{x:"3",y:"15",width:"7",height:"5",rx:"1"}),e.jsx("rect",{x:"14",y:"15",width:"7",height:"5",rx:"1"})]}),Ne=s=>e.jsx(l,{...s,children:e.jsx("path",{d:"M4 8V5a1 1 0 0 1 1-1h3M16 4h3a1 1 0 0 1 1 1v3M20 16v3a1 1 0 0 1-1 1h-3M8 20H5a1 1 0 0 1-1-1v-3"})}),Ee=s=>e.jsxs(l,{...s,children:[e.jsx("path",{d:"M20 11a8 8 0 1 0-.5 4"}),e.jsx("path",{d:"M20 4v5h-5"})]}),ke=s=>e.jsxs(l,{...s,children:[e.jsx("rect",{x:"4",y:"4",width:"16",height:"16",rx:"2"}),e.jsx("path",{d:"M4 9h16"})]}),Se=s=>e.jsxs(l,{...s,children:[e.jsx("path",{d:"M4 7h9a4 4 0 0 1 4 4v3"}),e.jsx("path",{d:"M14 11l3 3 3-3"})]}),Ie=s=>e.jsxs(l,{...s,children:[e.jsx("circle",{cx:"12",cy:"12",r:"9"}),e.jsx("path",{d:"M8.5 12.5l2.5 2.5 4.5-5"})]}),Le=s=>e.jsxs(l,{...s,children:[e.jsx("path",{d:"M12 4l9 16H3l9-16z"}),e.jsx("path",{d:"M12 10v4M12 17.5v.5"})]}),Re=s=>e.jsxs(l,{...s,children:[e.jsx("circle",{cx:"12",cy:"12",r:"9"}),e.jsx("path",{d:"M15 9l-6 6M9 9l6 6"})]}),Te=s=>e.jsx(l,{...s,children:e.jsx("path",{d:"M4 6h16M4 12h16M4 18h16"})}),ze=s=>e.jsxs(l,{...s,children:[e.jsx("rect",{x:"3",y:"3",width:"7",height:"7",rx:"1.5"}),e.jsx("rect",{x:"14",y:"3",width:"7",height:"7",rx:"1.5"}),e.jsx("rect",{x:"3",y:"14",width:"7",height:"7",rx:"1.5"}),e.jsx("rect",{x:"14",y:"14",width:"7",height:"7",rx:"1.5"})]}),De=s=>e.jsx(l,{...s,children:e.jsx("path",{d:"M6 6l12 12M18 6L6 18"})}),Be=s=>e.jsx(l,{...s,children:e.jsx("path",{d:"M5 12h14M13 6l6 6-6 6"})});function Fe({doc:s,saColors:i,countByArea:f,activeAreas:d,onSetActive:g,open:v,onClose:y}){const x=s.subject_areas,j=d.size>0,m=c=>g(new Set([c])),M=c=>{const p=new Set(d);p.has(c)?p.delete(c):p.add(c),g(p)},o=f.get("")??0;return e.jsxs("aside",{className:"canvas-drawer"+(v?" open":""),"aria-hidden":!v,children:[e.jsxs("div",{className:"drawer-header",children:[e.jsxs("h2",{children:[e.jsx(ze,{size:16})," Subject areas"]}),e.jsx("button",{className:"icon-btn",onClick:y,title:"Close","aria-label":"Close drawer",children:e.jsx(De,{size:16})})]}),e.jsx("div",{className:"drawer-hint",children:j?`Showing ${d.size} of ${x.length} — click a domain to focus, tick to add.`:"Click a domain to show only it. 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new file mode 100644
index 0000000..d643f9c
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+++ b/packages/server/src/mdl_server/static/assets/sme-C10_zE1B.css
@@ -0,0 +1 @@
+:root{--bg: #0e1218;--bg-raised: #161c26;--bg-card: #1b232f;--border: #2a3442;--border-strong: #3d4a5c;--text: #e6ecf3;--text-dim: #93a1b5;--accent: #5eead4;--pk: #fcd34d;--err: #f87171;--ok: #34d399;--font: "Inter", -apple-system, "Segoe UI", Roboto, sans-serif;--mono: ui-monospace, "SF Mono", Menlo, monospace}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:var(--font);background:var(--bg);color:var(--text)}.sme{display:flex;flex-direction:column;height:100%}.sme-splash{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:var(--text-dim)}.sme-splash.error pre{background:var(--bg-card);padding:12px;border-radius:8px;color:var(--err)}.sme-top{display:flex;align-items:center;gap:16px;padding:12px 20px;background:var(--bg-raised);border-bottom:1px solid var(--border)}.sme-brand{display:flex;align-items:baseline;gap:8px;font-weight:700;white-space:nowrap}.sme-logo{color:var(--accent);font-size:18px}.sme-project{color:var(--text-dim);font-weight:400;font-size:13px}.sme-search{flex:0 1 420px;padding:9px 14px;border-radius:9px;font-size:14px;border:1px solid var(--border);background:var(--bg-card);color:var(--text);outline:none}.sme-search:focus{border-color:var(--accent)}.sme-tray{margin-left:auto;padding:9px 16px;border-radius:99px;border:none;cursor:pointer;background:var(--pk);color:#1a1400;font-weight:700;font-size:13px}.sme-chip{display:inline-block;font-size:11px;padding:2px 9px;margin:0 4px 0 0;border-radius:99px;background:#94a3b824;color:var(--text-dim)}.sme-chip.catalog{background:#fbbf2429;color:#fbbf24}.sme-catalog-banner{border:1px solid rgba(251,191,36,.35);background:#fbbf2414;border-radius:8px;padding:10px 12px;font-size:13px;line-height:1.5;color:var(--text);margin:4px 0 10px}.sme-catalog-banner 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input{accent-color:var(--accent)}.erd-legend{margin-left:auto;display:flex;align-items:center;gap:8px}.erd-legend .sw{display:inline-block;width:10px;height:10px;border-radius:3px;margin-left:8px}.erd-canvas{flex:1;min-height:320px}.erd-canvas .react-flow__attribution{display:none}.erd-busy{color:var(--pk);font-size:11px}.erd-error{color:var(--err);font-size:11.5px;margin-left:auto}.sme-model-view .erd-canvas{position:relative;min-height:0}.erd-action{background:#5eead41f;border:1px solid rgba(94,234,212,.35);color:var(--accent);border-radius:7px;padding:3px 10px;cursor:pointer;font-size:12px;font-family:var(--font);font-weight:600}.erd-action:hover{background:#5eead433}.erd-hint{color:var(--text-dim);font-size:11.5px;font-style:italic}.sa-editor{flex:1;display:grid;grid-template-columns:220px 1fr;min-height:0}.sa-main{overflow-y:auto;padding:18px 24px;display:flex;flex-direction:column;gap:14px}.sa-head h2{margin:0 0 4px;font-size:19px}.sa-filter{flex:none;width:100%;margin-top:10px}.sa-nudge{border:1px solid rgba(252,211,77,.35);background:#fcd34d12;border-radius:8px;padding:9px 12px;font-size:13px;color:var(--text)}.sa-panes{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:stretch}.sa-pane{border:1px solid var(--border);border-radius:10px;background:var(--bg-card);display:flex;flex-direction:column;min-height:260px;max-height:380px}.sa-pane h3{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);margin:0;padding:10px 12px;border-bottom:1px solid var(--border)}.sa-pane ul{list-style:none;margin:0;padding:6px;overflow-y:auto;flex:1}.sa-row{display:flex;align-items:center;gap:8px;padding:6px 8px;border-radius:7px;cursor:pointer;font-size:13px}.sa-row:hover{background:#94a3b814}.sa-row.picked{background:#5eead41f}.sa-row input{accent-color:var(--accent);pointer-events:none}.sa-row-name{flex:1}.sme-badge.borrowed{background:#94a3b824;color:var(--text-dim)}.sa-controls{display:flex;flex-direction:column;gap:6px;justify-content:center}.sa-controls button{min-width:44px}.sa-expand{border-top:1px solid var(--border);padding-top:14px}.sa-expand h3{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);margin:0 0 9px}.sa-expand-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.sa-expand-row select{padding:7px 10px;border-radius:8px;border:1px solid var(--border);background:var(--bg-card);color:var(--text);font-size:13px}.sa-expand-row label{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-dim)}.sa-expand-row input[type=number]{width:56px;padding:6px 8px;border-radius:7px;border:1px solid var(--border);background:var(--bg-card);color:var(--text)}.sa-hops{margin-top:12px;display:flex;flex-direction:column;gap:4px}.sa-hop{display:flex;align-items:baseline;gap:9px;padding:7px 10px;border-radius:7px;background:var(--bg-card);border:1px solid var(--border);font-size:13px;cursor:pointer}.sa-hop input{accent-color:var(--accent)}.sa-hop-name{font-weight:600}.sa-hop-why{color:var(--text-dim);font-size:11.5px;font-family:var(--mono)}.sa-hop-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:10px}.erd-panels{display:flex;gap:6px}.erd-group{display:inline-flex;gap:6px}.erd-sep{width:1px;align-self:stretch;margin:2px;background:var(--border);flex:none}.erd-caret{opacity:.55;margin-left:1px}.erd-action.ghost{background:none;border-color:var(--border);color:var(--text-dim);font-weight:500;display:inline-flex;align-items:center;gap:5px}.erd-action.ghost:hover{color:var(--text);border-color:var(--border-strong);background:none}.erd-action.ghost.on{background:#5eead41f;border-color:#5eead459;color:var(--accent)}.sme-nav-head{display:flex;align-items:center;justify-content:space-between;font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);padding:2px 10px 8px}.sme-nav-add{background:none;border:1px solid var(--border);color:var(--text-dim);width:20px;height:20px;line-height:1;border-radius:6px;cursor:pointer;font-size:14px;font-family:var(--font)}.sme-nav-add:hover{color:var(--accent);border-color:#5eead466}.sme-nav-new input{width:100%;padding:7px 10px;border-radius:8px;font-size:13px;border:1px solid var(--accent);background:var(--bg-card);color:var(--text);outline:none;font-family:var(--font)}.sme-sa{display:flex;align-items:center;gap:8px}.sme-sa>:first-child{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sme-sa .sme-sa-count{float:none;margin-left:auto;flex:none}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.sa-modal{width:min(900px,92vw);max-height:88vh}.sa-modal .sa-panes{margin-top:14px}.sa-modal .sa-pane{min-height:200px;max-height:260px}.sa-modal .sa-filter{margin-top:14px}.sa-modal .sa-expand{margin-top:16px}
diff --git a/packages/server/src/mdl_server/static/assets/sme-DYGKbOTM.css b/packages/server/src/mdl_server/static/assets/sme-DYGKbOTM.css
deleted file mode 100644
index f0414a2..0000000
--- a/packages/server/src/mdl_server/static/assets/sme-DYGKbOTM.css
+++ /dev/null
@@ -1 +0,0 @@
-:root{--bg: #0e1218;--bg-raised: #161c26;--bg-card: #1b232f;--border: #2a3442;--border-strong: #3d4a5c;--text: #e6ecf3;--text-dim: #93a1b5;--accent: #5eead4;--pk: #fcd34d;--err: #f87171;--ok: #34d399;--font: "Inter", -apple-system, "Segoe UI", Roboto, sans-serif;--mono: ui-monospace, "SF Mono", Menlo, monospace}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:var(--font);background:var(--bg);color:var(--text)}.sme{display:flex;flex-direction:column;height:100%}.sme-splash{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:var(--text-dim)}.sme-splash.error pre{background:var(--bg-card);padding:12px;border-radius:8px;color:var(--err)}.sme-top{display:flex;align-items:center;gap:16px;padding:12px 20px;background:var(--bg-raised);border-bottom:1px solid var(--border)}.sme-brand{display:flex;align-items:baseline;gap:8px;font-weight:700;white-space:nowrap}.sme-logo{color:var(--accent);font-size:18px}.sme-project{color:var(--text-dim);font-weight:400;font-size:13px}.sme-search{flex:0 1 420px;padding:9px 14px;border-radius:9px;font-size:14px;border:1px solid var(--border);background:var(--bg-card);color:var(--text);outline:none}.sme-search:focus{border-color:var(--accent)}.sme-tray{margin-left:auto;padding:9px 16px;border-radius:99px;border:none;cursor:pointer;background:var(--pk);color:#1a1400;font-weight:700;font-size:13px}.sme-chip{display:inline-block;font-size:11px;padding:2px 9px;margin:0 4px 0 0;border-radius:99px;background:#94a3b824;color:var(--text-dim)}.sme-chip.catalog{background:#fbbf2429;color:#fbbf24}.sme-catalog-banner{border:1px solid rgba(251,191,36,.35);background:#fbbf2414;border-radius:8px;padding:10px 12px;font-size:13px;line-height:1.5;color:var(--text);margin:4px 0 10px}.sme-catalog-banner 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12px;border-radius:9px;cursor:pointer;margin-bottom:4px}.sme-list-item:hover{background:var(--bg-card)}.sme-list-item.active{background:#5eead41a;box-shadow:inset 2px 0 0 var(--accent)}.sme-term-name{font-weight:600;font-size:14px;margin-right:6px}.sme-kind{font-size:10px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.05em}.sme-badge{font-size:10px;padding:1px 7px;border-radius:99px;margin-left:4px;background:#94a3b829;color:var(--text-dim)}.sme-badge.proposed{background:#fcd34d29;color:var(--pk)}.sme-term-def{display:block;color:var(--text-dim);font-size:12px;margin-top:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sme-empty{color:var(--text-dim);padding:12px;font-style:italic}.sme-detail{overflow-y:auto;padding:24px 32px}.sme-placeholder{color:var(--text-dim);margin-top:40px;text-align:center}.sme-card-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.sme-card-head h1,.sme-card-head h2{margin:0 0 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input:focus{border-color:var(--accent)}.sme-field-row{display:flex;gap:16px;margin-top:22px}.sme-field-row .sme-field{flex:1}.sme-syn-row{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.sme-syn-row input{flex:1;min-width:120px}.sme-chip.removable{cursor:pointer;background:#5eead424;color:var(--accent)}.sme-align-results{display:flex;flex-direction:column;gap:6px;max-height:240px;overflow-y:auto;margin:8px 0}.sme-align-card{text-align:left;background:var(--bg-card);border:1px solid var(--border);border-radius:9px;padding:10px 12px;cursor:pointer;color:var(--text)}.sme-align-card:hover{border-color:var(--accent)}.sme-align-card 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var(--border);display:flex;align-items:flex-start;gap:20px}.rv-back{background:none;border:none;color:var(--text-dim);cursor:pointer;font-size:13px;padding:4px 0;font-family:var(--font)}.rv-back:hover{color:var(--accent)}.rv-title{margin:0 0 3px;font-size:19px}.rv-sub{color:var(--text-dim);font-size:13px}.rv-sub .warn{color:var(--err);font-weight:600}.rv-tabs{margin-left:auto;display:flex;gap:4px}.rv-tab{background:none;border:1px solid var(--border);color:var(--text-dim);padding:7px 16px;border-radius:8px;cursor:pointer;font-size:13px;font-family:var(--font)}.rv-tab.active{background:var(--bg-card);color:var(--text);border-color:var(--border-strong)}.rv-body{flex:1;display:grid;grid-template-columns:380px 1fr;min-height:0}.rv-list{border-right:1px solid var(--border);overflow-y:auto;padding:10px}.rv-detail{overflow-y:auto;padding:22px 28px}.rv-obj{border:1px solid var(--border);border-radius:10px;margin-bottom:8px;background:var(--bg-card);cursor:pointer;overflow:hidden}.rv-obj:hover{border-color:var(--border-strong)}.rv-obj.active{border-color:var(--accent);box-shadow:inset 2px 0 0 var(--accent)}.rv-obj-head{display:flex;align-items:baseline;gap:8px;padding:11px 13px}.rv-obj-name{font-weight:600;font-size:14px}.rv-obj-kind{font-size:10px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.05em}.rv-obj-fields{list-style:none;margin:0;padding:0 13px 11px 26px}.rv-obj-fields li{font-size:12.5px;color:var(--text-dim);line-height:1.7;position:relative}.rv-obj-fields li:before{content:"└";position:absolute;left:-13px;color:var(--border-strong)}.sev{font-size:10px;padding:2px 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del{background:#f871712e;color:#fca5a5;text-decoration:none}.rv-ba-text ins{background:#34d39929;color:#6ee7b7;text-decoration:none}.rv-hint{color:var(--text-dim);font-size:11.5px;margin-top:7px;font-style:italic}.rv-scalar{display:flex;align-items:center;gap:10px;font-size:13.5px;background:var(--bg-card);border:1px solid var(--border);border-radius:9px;padding:11px 14px}.rv-scalar .from{color:var(--err)}.rv-scalar .to{color:var(--ok)}.rv-scalar .arrow{color:var(--text-dim)}.rv-chips{display:flex;flex-wrap:wrap;gap:6px}.rv-chip-add{font-size:12px;padding:3px 10px;border-radius:99px;background:#34d39924;color:var(--ok)}.rv-break{border:1px solid rgba(248,113,113,.4);background:#f871710f;border-radius:10px;padding:14px 16px}.rv-break-head{display:flex;align-items:baseline;gap:8px;color:var(--err);font-weight:700;font-size:14px;margin-bottom:4px}.rv-break-meta{color:var(--text-dim);font-size:12px;font-family:var(--mono);margin-left:auto}.rv-break-body{font-size:13.5px;line-height:1.6;margin:10px 0 12px}.rv-usage{list-style:none;margin:0;padding:0}.rv-usage li{display:flex;align-items:center;gap:9px;padding:8px 12px;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;margin-bottom:6px;font-size:13px}.rv-usage .m{font-weight:600}.rv-usage .p{color:var(--text-dim);font-family:var(--mono);font-size:11px}.rv-note{display:flex;gap:9px;align-items:flex-start;margin-top:18px;color:var(--text-dim);font-size:13px;line-height:1.6}.rv-note .i{color:var(--accent)}.rv-foot{border-top:1px solid var(--border);background:var(--bg-raised);padding:13px 24px}.rv-route{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;font-size:13px}.rv-route-badge{font-weight:700;color:var(--pk);background:#fcd34d21;padding:3px 11px;border-radius:99px;font-size:12px}.rv-route .k{color:var(--text-dim)}.rv-src{color:var(--text-dim);font-size:11px;font-style:italic}.rv-gates{margin-top:6px;font-size:12.5px;color:var(--text-dim)}.rv-gates code{font-family:var(--mono);color:var(--text);background:var(--bg-card);padding:1px 6px;border-radius:5px;margin-right:5px;font-size:11.5px}.rv-conflict{margin-top:10px;font-size:13px;display:flex;align-items:center;gap:8px}.rv-conflict.ok{color:var(--ok)}.rv-conflict.bad{color:var(--err)}.rv-conflict .detail{color:var(--text-dim)}.rv-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:12px}.pr-wrap{padding:20px 24px;max-width:940px}.pr-head{display:flex;align-items:baseline;gap:12px;margin-bottom:16px}.pr-head h2{margin:0;font-size:19px}.pr-head .meta{color:var(--text-dim);font-size:13px;margin-left:auto}.pr-card{border:1px solid var(--border);border-radius:11px;background:var(--bg-card);padding:14px 16px;margin-bottom:10px}.pr-card.attention{border-color:#f8717173}.pr-top{display:flex;align-items:baseline;gap:12px}.pr-title{font-weight:600;font-size:14.5px}.pr-chip{font-size:11px;padding:3px 10px;border-radius:99px;margin-left:auto;white-space:nowrap;font-weight:600}.pr-chip.accepted{background:#34d39924;color:var(--ok)}.pr-chip.changes{background:#5eead421;color:var(--accent)}.pr-chip.attention{background:#f8717126;color:var(--err)}.pr-chip.awaiting,.pr-chip.local{background:#94a3b824;color:var(--text-dim)}.pr-branch{font-family:var(--mono);font-size:11px;color:var(--text-dim);margin-top:5px}.pr-summary{font-size:13px;margin-top:7px}.pr-detail{font-size:12.5px;color:var(--err);margin-top:6px;line-height:1.5}.pr-foot{display:flex;align-items:center;gap:10px;margin-top:11px}.pr-foot 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diff --git a/packages/server/src/mdl_server/static/assets/sme-Zxw1Myjj.js b/packages/server/src/mdl_server/static/assets/sme-Zxw1Myjj.js
new file mode 100644
index 0000000..1da7f69
--- /dev/null
+++ b/packages/server/src/mdl_server/static/assets/sme-Zxw1Myjj.js
@@ -0,0 +1,2 @@
+const __vite__mapDeps=(i,m=__vite__mapDeps,d=(m.f||(m.f=["assets/ModelDiagram-CRUBpPVn.js","assets/client-DOmNpTln.js","assets/styles-B90OKxCj.js","assets/styles-DxhL4SV-.css"])))=>i.map(i=>d[i]);
+import{r as a,j as e,c as Ge,R as Ke}from"./client-DOmNpTln.js";import{p as xe,c as be,d as ge,e as Ve,h as ve,I as Ue,R as Fe,M as Te,O as Ye,L as Je,i as Qe,j as Xe,A as Ze,k as es,l as ss,m as ns,o as ts,n as as,s as rs,f as ie,q as is,r as ls,t as cs,b as os}from"./styles-B90OKxCj.js";/* empty css            */const ds="0123456789ABCDEFGHJKMNPQRSTVWXYZ";function he(s,n){let t="";for(let i=0;i<n;i++)t=ds[Number(s&31n)]+t,s>>=5n;return t}function Ne(){const s=BigInt(Date.now())&(1n<<48n)-1n,n=new Uint8Array(10);crypto.getRandomValues(n);let t=0n;for(const i of n)t=t<<8n|BigInt(i);return he(s,10)+he(t,16)}const hs={create_entity:["id","conceptual_id"],create_relationship:["id","from_fk_id"],create_subject_area:["id"],create_term:["id"],create_domain:["id"],create_code_set:["id"],create_key_group:["id"],create_category:["id"],add_attribute:["id"]};function ms(s,n){const t=hs[s];if(!t)return n;const i={...n};for(const l of t)i[l]||(i[l]=Ne());return i}function 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diff --git a/packages/server/src/mdl_server/static/assets/styles-B90OKxCj.js b/packages/server/src/mdl_server/static/assets/styles-B90OKxCj.js
new file mode 100644
index 0000000..6cbaefa
--- /dev/null
+++ b/packages/server/src/mdl_server/static/assets/styles-B90OKxCj.js
@@ -0,0 +1,23 @@
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+ * @license React
+ * use-sync-external-store-shim.production.js
+ *
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */var Et=w;function rl(e,t){return e===t&&(e!==0||1/e===1/t)||e!==e&&t!==t}var sl=typeof Object.is=="function"?Object.is:rl,il=Et.useState,ol=Et.useEffect,al=Et.useLayoutEffect,ll=Et.useDebugValue;function cl(e,t){var n=t(),r=il({inst:{value:n,getSnapshot:t}}),s=r[0].inst,i=r[1];return al(function(){s.value=n,s.getSnapshot=t,zn(s)&&i({inst:s})},[e,n,t]),ol(function(){return zn(s)&&i({inst:s}),e(function(){zn(s)&&i({inst:s})})},[e]),ll(n),n}function zn(e){var t=e.getSnapshot;e=e.value;try{var n=t();return!sl(e,n)}catch{return!0}}function ul(e,t){return t()}var dl=typeof window>"u"||typeof window.document>"u"||typeof window.document.createElement>"u"?ul:cl;gi.useSyncExternalStore=Et.useSyncExternalStore!==void 0?Et.useSyncExternalStore:dl;pi.exports=gi;var fl=pi.exports;/**
+ * @license React
+ * use-sync-external-store-shim/with-selector.production.js
+ *
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */var kn=w,hl=fl;function ml(e,t){return e===t&&(e!==0||1/e===1/t)||e!==e&&t!==t}var pl=typeof Object.is=="function"?Object.is:ml,gl=hl.useSyncExternalStore,yl=kn.useRef,xl=kn.useEffect,wl=kn.useMemo,bl=kn.useDebugValue;mi.useSyncExternalStoreWithSelector=function(e,t,n,r,s){var i=yl(null);if(i.current===null){var o={hasValue:!1,value:null};i.current=o}else o=i.current;i=wl(function(){function l(f){if(!c){if(c=!0,u=f,f=r(f),s!==void 0&&o.hasValue){var x=o.value;if(s(x,f))return d=x}return d=f}if(x=d,pl(u,f))return x;var y=r(f);return s!==void 0&&s(x,y)?(u=f,x):(u=f,d=y)}var c=!1,u,d,m=n===void 0?null:n;return[function(){return l(t())},m===null?void 0:function(){return l(m())}]},[t,n,r,s]);var a=gl(e,i[0],i[1]);return xl(function(){o.hasValue=!0,o.value=a},[a]),bl(a),a};hi.exports=mi;var vl=hi.exports;const _l=fi(vl),El={},Wr=e=>{let t;const n=new Set,r=(u,d)=>{const m=typeof u=="function"?u(t):u;if(!Object.is(m,t)){const f=t;t=d??(typeof m!="object"||m===null)?m:Object.assign({},t,m),n.forEach(x=>x(t,f))}},s=()=>t,l={setState:r,getState:s,getInitialState:()=>c,subscribe:u=>(n.add(u),()=>n.delete(u)),destroy:()=>{(El?"production":void 0)!=="production"&&console.warn("[DEPRECATED] The `destroy` method will be unsupported in a future version. 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uh({onSelectionContextMenu:e,noPanClassName:t,disableKeyboardA11y:n}){const r=pe(),{width:s,height:i,x:o,y:a,transformString:l,userSelectionActive:c}=ae(ch,ge),u=jo(),d=w.useRef(null);if(w.useEffect(()=>{var x;n||(x=d.current)==null||x.focus({preventScroll:!0})},[n]),ko({nodeRef:d}),c||!s||!i)return null;const m=e?x=>{const y=r.getState().getNodes().filter(v=>v.selected);e(x,y)}:void 0,f=x=>{Object.prototype.hasOwnProperty.call(vt,x.key)&&u({x:vt[x.key].x,y:vt[x.key].y,isShiftPressed:x.shiftKey})};return M.createElement("div",{className:ye(["react-flow__nodesselection","react-flow__container",t]),style:{transform:l}},M.createElement("div",{ref:d,className:"react-flow__nodesselection-rect",onContextMenu:m,tabIndex:n?void 0:-1,onKeyDown:n?void 0:f,style:{width:s,height:i,top:a,left:o}}))}var dh=w.memo(uh);const fh=e=>e.nodesSelectionActive,Co=({children:e,onPaneClick:t,onPaneMouseEnter:n,onPaneMouseMove:r,onPaneMouseLeave:s,onPaneContextMenu:i,onPaneScroll:o,deleteKeyCode:a,onMove:l,onMoveStart:c,onMoveEnd:u,selectionKeyCode:d,selectionOnDrag:m,selectionMode:f,onSelectionStart:x,onSelectionEnd:y,multiSelectionKeyCode:v,panActivationKeyCode:p,zoomActivationKeyCode:E,elementsSelectable:$,zoomOnScroll:b,zoomOnPinch:A,panOnScroll:j,panOnScrollSpeed:_,panOnScrollMode:I,zoomOnDoubleClick:S,panOnDrag:D,defaultViewport:P,translateExtent:V,minZoom:F,maxZoom:g,preventScrolling:C,onSelectionContextMenu:N,noWheelClassName:R,noPanClassName:H,disableKeyboardA11y:k})=>{const T=ae(fh),L=Wt(d),z=Wt(p),Y=z||D,G=z||j,K=L||m&&Y!==!0;return 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diff --git a/packages/server/src/mdl_server/static/assets/styles-BtrhR1xb.js b/packages/server/src/mdl_server/static/assets/styles-BtrhR1xb.js
deleted file mode 100644
index f158962..0000000
--- a/packages/server/src/mdl_server/static/assets/styles-BtrhR1xb.js
+++ /dev/null
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active":""),title:(f.description??"")+(f.count!=null?` · ${f.count} terms`:" · live"),onClick:()=>d(f.id),children:[f.name,f.layer&&h.jsx("span",{className:`src-layer layer-${f.layer}`,children:f.layer})]},f.id))]}),h.jsx("input",{className:"edit-input",placeholder:u?`Search within ${u}…`:"Search vocabulary terms…",value:e,onChange:f=>t(f.target.value)}),h.jsx("p",{className:"meta-line",children:l.length>0?`${l.length} source${l.length>1?"s":""}: ${s.vocabs.join(", ")}`+(s.loaded>0?` · ${s.loaded} local terms indexed`:""):"no vocabulary loaded — declare ontology_stack in mdl-project.yaml or run `mdl ontology vendor fibo`"}),h.jsx("div",{className:"term-results",children:n.map(f=>h.jsxs("button",{className:"term-card",onClick:()=>m(f.prefixed),children:[h.jsxs("div",{className:"term-head",children:[h.jsx("span",{className:"term-label",children:f.label}),h.jsxs("span",{className:"term-source",children:[f.source_kind==="glossary-term"&&h.jsx("span",{className:"kind-badge",title:"glossary term",children:"glossary"}),f.source]})]}),h.jsx("code",{className:"term-iri",children:f.prefixed}),f.definition&&h.jsx("p",{className:"term-def",children:f.definition})]},f.iri))})]})}const ux=["industry","core","domain","specialised"];function dx({refreshKey:e,onFocusEntity:t}){const[n,r]=w.useState(null),[s,i]=w.useState(null);if(w.useEffect(()=>{bm().then(r).catch(()=>{}),vm().then(i).catch(()=>{})},[e]),!n)return h.jsx("div",{className:"panel-body",children:"loading…"});const o=new Set((s==null?void 0:s.core_uncovered)??[]);return h.jsxs("div",{className:"panel-body",children:[s&&h.jsxs("div",{className:"coverage-banner"+(s.coverage_pct<100?" warn":""),children:["industry alignment coverage: ",h.jsxs("b",{children:[s.coverage_pct,"%"]})," (",s.core_with_industry,"+",s.core_exempt,"/",s.total_core," core terms)"]}),h.jsxs("div",{className:"layer-band external",children:[h.jsx("h4",{children:"industry (external vocabularies)"}),n.external_terms.length===0&&h.jsx("p",{className:"empty-hint",children:"no aligned terms yet"}),n.external_terms.map(a=>h.jsxs("div",{className:"stack-term external",title:a.definition??void 0,children:[a.label,h.jsx("span",{className:"term-source",children:a.source})]},a.iri))]}),ux.slice(1).map(a=>h.jsxs("div",{className:"layer-band",children:[h.jsx("h4",{children:a}),(n.layers[a]??[]).length===0&&h.jsx("p",{className:"empty-hint",children:"—"}),(n.layers[a]??[]).map(l=>{var c;return h.jsxs("button",{className:"stack-term"+(o.has(l.name)?" uncovered":""),title:l.definition??void 0,onClick:()=>t(l.id),children:[l.name,(l.aligned_refs??(l.aligned_to?[l.aligned_to]:[])).map((u,d)=>h.jsxs("span",{className:"align-arrow"+(u.resolved?"":" unresolved")+(u.status==="proposed"?" proposed":""),title:u.ref+(u.resolved_via?` (via ${u.resolved_via})`:""),children:["↑ ",u.label,u.status==="proposed"?" ·prop":""]},`${u.ref}-${d}`)),!l.aligned_to&&(((c=l.aligned_refs)==null?void 0:c.length)??0)===0&&!l.no_industry_equivalent&&h.jsx("span",{className:"align-arrow missing",children:"unaligned"})]},l.id)})]},a))]})}function fx({readOnly:e,refreshKey:t,onModelChanged:n}){const[r,s]=w.useState(null),[i,o]=w.useState(""),[a,l]=w.useState(""),[c,u]=w.useState(!1),d=w.useCallback(()=>{Em().then(s).catch(()=>s(null)),Nm().then(m=>o([m.diff,...m.untracked].filter(Boolean).join(`
-
-`))).catch(()=>o(""))},[]);return w.useEffect(d,[d,t]),r!=null&&r.git?r.clean?h.jsx("div",{className:"panel-body ok",children:"✓ working tree clean"}):h.jsxs("div",{className:"panel-body",children:[h.jsx("ul",{className:"dirty-list",children:r.dirty.map(m=>h.jsxs("li",{children:[h.jsx("code",{className:"dirty-state",children:m.state})," ",m.path]},m.path))}),h.jsx("pre",{className:"diff-view",children:i.split(`
-`).map((m,f)=>h.jsx("span",{className:m.startsWith("+")&&!m.startsWith("+++")?"diff-add":m.startsWith("-")&&!m.startsWith("---")?"diff-del":m.startsWith("@@")?"diff-hunk":"",children:m+`
-`},f))}),!e&&h.jsxs(h.Fragment,{children:[h.jsx("input",{className:"edit-input",placeholder:"commit message…",value:a,onChange:m=>l(m.target.value)}),h.jsxs("div",{className:"modal-footer",children:[h.jsx("button",{className:"mini-btn danger",disabled:c,onClick:()=>{confirm("Discard ALL uncommitted model changes?")&&(u(!0),km().then(()=>{u(!1),d(),n()}))},children:"Discard all"}),h.jsx("button",{className:"primary-btn",disabled:c||!a.trim(),onClick:()=>{u(!0),Sm(a).then(()=>{u(!1),l(""),d()})},children:"Commit"})]})]})]}):h.jsx("div",{className:"panel-body",children:"model directory is not in a git repo"})}function hx({readOnly:e}){const[t,n]=w.useState([]),r=w.useCallback(()=>{jm().then(i=>n(i.decisions)).catch(()=>n([]))},[]);if(w.useEffect(r,[r]),t.length===0)return h.jsx("div",{className:"panel-body",children:"no recorded decisions (run `mdl reverse` to propose)"});const s={accepted:"✓",rejected:"✗",proposed:"?"};return h.jsx("div",{className:"panel-body",children:t.map(i=>h.jsxs("div",{className:"decision "+i.verdict,children:[h.jsxs("div",{className:"decision-head",children:[h.jsx("span",{className:"decision-mark",children:s[i.verdict]}),h.jsx("span",{className:"chip",children:i.confidence}),h.jsx("span",{className:"chip",children:i.signal})]}),h.jsx("p",{className:"decision-subject",children:i.subject}),!e&&i.verdict==="proposed"&&h.jsxs("div",{className:"decision-actions",children:[h.jsx("button",{className:"mini-btn",onClick:()=>Os(i.signal_key,"accepted").then(r),children:"Accept"}),h.jsx("button",{className:"mini-btn danger",onClick:()=>Os(i.signal_key,"rejected").then(r),children:"Reject"})]})]},i.signal_key))})}function Px({exec:e,canEdit:t,onImported:n,submitLabel:r="Import & review",buttonClass:s="erd-action ghost",applyBatch:i,openImport:o=!1}){const[a,l]=w.useState(o&&t?"import":null),[c,u]=w.useState([]),[d,m]=w.useState("postgres"),f=w.useRef(null);w.useEffect(()=>{Cm().then(p=>u(p.formats)).catch(()=>u([]))},[]),w.useEffect(()=>{if(!a)return;const p=v=>{f.current&&!f.current.contains(v.target)&&l(null)};return document.addEventListener("mousedown",p),()=>document.removeEventListener("mousedown",p)},[a]);const y=c.find(p=>p.id==="sql");return h.jsxs("div",{className:"ie-wrap",ref:f,children:[h.jsxs("button",{className:s+(a==="export"?" on":""),onClick:()=>l(a==="export"?null:"export"),children:[h.jsx("span",{className:"erd-ico","aria-hidden":"true",children:"↧"}),"Export ",h.jsx("span",{className:"erd-caret",children:"▾"})]}),t&&h.jsxs("button",{className:s+(a==="import"?" on":""),onClick:()=>l(a==="import"?null:"import"),children:[h.jsx("span",{className:"erd-ico","aria-hidden":"true",children:"↥"}),"Import 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subtypes"}];function mx({exec:e,submitLabel:t,buttonClass:n,applyBatch:r,onClose:s,onImported:i}){var b;const[o,a]=w.useState("sql"),[l,c]=w.useState("postgres"),[u,d]=w.useState(""),[m,f]=w.useState(!1),[y,p]=w.useState(null),[v,x]=w.useState([]),_=j=>{j&&j.text().then(d).catch(()=>p("could not read that file"))},M=async()=>{f(!0),p(null),x([]);try{const j=await Mm(o,u,o==="sql"?l:void 0);if(!j.changes.length){p(j.warnings[0]??"nothing to import from that document"),f(!1);return}if(r)await r(j.changes);else for(const C of j.changes)await e(C.op,C.payload);x(j.warnings),i(j.tables)}catch(j){p(j instanceof Error?j.message:String(j))}finally{f(!1)}};return h.jsxs("div",{className:"ie-menu ie-import",role:"dialog",children:[h.jsx("div",{className:"ie-tabs",children:di.map(j=>h.jsx("button",{className:"ie-tab"+(o===j.id?" active":""),onClick:()=>a(j.id),children:j.label},j.id))}),h.jsx("p",{className:"ie-hint",children:(b=di.find(j=>j.id===o))==null?void 0:b.hint}),o==="sql"&&h.jsxs("label",{className:"ie-dialect",children:[h.jsx("span",{children:"dialect"}),h.jsx("select",{value:l,onChange:j=>c(j.target.value),children:["postgres","snowflake","mysql","duckdb"].map(j=>h.jsx("option",{children:j},j))})]}),h.jsx("textarea",{className:"ie-textarea",placeholder:`Paste ${o} here, or choose a file…`,value:u,onChange:j=>d(j.target.value),rows:8}),h.jsx("input",{type:"file",className:"ie-file",accept:".sql,.mmd,.md,.json,.xml,.txt",onChange:j=>{var C;return _(((C=j.target.files)==null?void 0:C[0])??null)}}),o==="mermaid"&&h.jsx("p",{className:"ie-warn",children:"Mermaid is a diagram format: types and keys are approximate and relationships are inferred from the lines."}),v.map((j,C)=>h.jsx("p",{className:"ie-warn",children:j},C)),y&&h.jsx("p",{className:"ie-error",children:y}),h.jsxs("div",{className:"ie-foot",children:[h.jsx("button",{className:n,onClick:s,children:"Cancel"}),h.jsx("button",{className:n,disabled:m||!u.trim(),onClick:M,children:m?"Importing…":t})]})]})}export{Vo as A,xm as B,fm as C,Rm as E,Px as I,dx as L,Dx as M,cx as O,ci as P,To as R,Lx as S,xx as a,Cx as b,kx as c,Mx as d,Ax as e,yx as f,Em as g,Ix as h,jx as i,vx as j,_x as k,Ex as l,Sx as m,Nx as n,Bo as o,$x as p,wx as q,bx as r,_m as s,ri as t,Do as u,ix as v,im as w};
diff --git a/packages/server/src/mdl_server/static/index.html b/packages/server/src/mdl_server/static/index.html
index 47f766d..3ef1a9a 100644
--- a/packages/server/src/mdl_server/static/index.html
+++ b/packages/server/src/mdl_server/static/index.html
@@ -4,9 +4,9 @@
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Modelith</title>
-    <script type="module" crossorigin src="/assets/main-DgsUduj_.js"></script>
+    <script type="module" crossorigin src="/assets/main-DScWOCuj.js"></script>
     <link rel="modulepreload" crossorigin href="/assets/client-DOmNpTln.js">
-    <link rel="modulepreload" crossorigin href="/assets/styles-BtrhR1xb.js">
+    <link rel="modulepreload" crossorigin href="/assets/styles-B90OKxCj.js">
     <link rel="stylesheet" crossorigin href="/assets/styles-DxhL4SV-.css">
   </head>
   <body>
diff --git a/packages/server/src/mdl_server/static/mocks.html b/packages/server/src/mdl_server/static/mocks.html
index 9fd9841..66810f1 100644
--- a/packages/server/src/mdl_server/static/mocks.html
+++ b/packages/server/src/mdl_server/static/mocks.html
@@ -4,10 +4,10 @@
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Modelith — Model Git-Ops mocks</title>
-    <script type="module" crossorigin src="/assets/mocks-DUwiNnjR.js"></script>
+    <script type="module" crossorigin src="/assets/mocks-AfcrRcE6.js"></script>
     <link rel="modulepreload" crossorigin href="/assets/client-DOmNpTln.js">
     <link rel="stylesheet" crossorigin href="/assets/mocks-MuxcEIum.css">
-    <link rel="stylesheet" crossorigin href="/assets/sme-DYGKbOTM.css">
+    <link rel="stylesheet" crossorigin href="/assets/sme-C10_zE1B.css">
   </head>
   <body>
     <div id="root"></div>
diff --git a/packages/server/src/mdl_server/static/sme.html b/packages/server/src/mdl_server/static/sme.html
index 85a3038..ccd2daa 100644
--- a/packages/server/src/mdl_server/static/sme.html
+++ b/packages/server/src/mdl_server/static/sme.html
@@ -4,11 +4,11 @@
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Modelith Glossary</title>
-    <script type="module" crossorigin src="/assets/sme-rGO675Bx.js"></script>
+    <script type="module" crossorigin src="/assets/sme-Zxw1Myjj.js"></script>
     <link rel="modulepreload" crossorigin href="/assets/client-DOmNpTln.js">
-    <link rel="modulepreload" crossorigin href="/assets/styles-BtrhR1xb.js">
+    <link rel="modulepreload" crossorigin href="/assets/styles-B90OKxCj.js">
     <link rel="stylesheet" crossorigin href="/assets/styles-DxhL4SV-.css">
-    <link rel="stylesheet" crossorigin href="/assets/sme-DYGKbOTM.css">
+    <link rel="stylesheet" crossorigin href="/assets/sme-C10_zE1B.css">
   </head>
   <body>
     <div id="root"></div>
diff --git a/packages/server/tests/test_import_erwin_api.py b/packages/server/tests/test_import_erwin_api.py
index d5f554b..42f0cff 100644
--- a/packages/server/tests/test_import_erwin_api.py
+++ b/packages/server/tests/test_import_erwin_api.py
@@ -31,3 +31,51 @@ def test_api_import_empty_content_422(tmp_path):
     client = TestClient(create_app(tmp_path))
     r = client.post("/api/import", json={"format": "erwin", "content": ""})
     assert r.status_code == 422
+
+
+def test_import_preview_returns_diff_doc_and_changes(tmp_path):
+    """Pre-write review: /api/import/preview returns a ModelDiffDoc (the review view's shape)
+    PLUS the import's changes + warnings, and writes nothing."""
+    (tmp_path / "mdl-project.yaml").write_text("name: t\ndbt_target: duckdb\n")
+    client = TestClient(create_app(tmp_path))
+    r = client.post("/api/import/preview", json={"format": "erwin", "content": _erwin_xml()})
+    assert r.status_code == 200, r.text
+    doc = r.json()
+    # the ModelDiffDoc contract the canvas review view consumes
+    assert doc["ok"] is True
+    assert "objects" in doc and isinstance(doc["objects"], list)
+    assert "max_severity" in doc and "has_breaking" in doc
+    assert doc["base"]["label"] == "current model"
+    assert doc["head"]["label"] == "erwin import"
+    # into an empty model, the 3 erwin entities are all ADDED
+    names = {o.get("name_after") for o in doc["objects"]}
+    assert {"counterparty", "trade", "institution"} <= names
+    assert all(o["change"] == "added" for o in doc["objects"] if o["object_kind"] == "logical_entity")
+    # the write payload rides along for the apply action
+    ops = {c["op"] for c in doc["changes"]}
+    assert "create_entity" in ops
+    assert isinstance(doc["warnings"], list)
+    # it wrote nothing — the model dir still has only the project file
+    assert not (tmp_path / "logical").exists()
+
+
+def test_import_preview_non_erwin_422(tmp_path):
+    (tmp_path / "mdl-project.yaml").write_text("name: t\ndbt_target: duckdb\n")
+    client = TestClient(create_app(tmp_path))
+    r = client.post("/api/import/preview", json={"format": "sql", "content": "CREATE TABLE t(x int);"})
+    assert r.status_code == 422
+
+
+def test_import_stash_roundtrip_is_one_shot(tmp_path):
+    """A host (VS Code) stashes .xml content; the canvas fetches it once by token."""
+    (tmp_path / "mdl-project.yaml").write_text("name: t\ndbt_target: duckdb\n")
+    client = TestClient(create_app(tmp_path))
+    put = client.post("/api/import/stash", json={"content": "<erwin/>"})
+    assert put.status_code == 200
+    token = put.json()["token"]
+    got = client.get(f"/api/import/stash/{token}")
+    assert got.status_code == 200 and got.json()["content"] == "<erwin/>"
+    # consumed -> a second read is 404
+    assert client.get(f"/api/import/stash/{token}").status_code == 404
+    # empty content is rejected
+    assert client.post("/api/import/stash", json={"content": ""}).status_code == 422
diff --git a/packages/server/tests/test_review_diff_contract.py b/packages/server/tests/test_review_diff_contract.py
new file mode 100644
index 0000000..2f431ad
--- /dev/null
+++ b/packages/server/tests/test_review_diff_contract.py
@@ -0,0 +1,72 @@
+"""System test: the ModelDiffDoc the review view (canvas DiffView Phase 1) consumes.
+
+The canvas review view filters and per-field-selects over the diff the server produces
+from /api/preview. This asserts the exact wire contract that per-field selection depends
+on — every changed object carries a stable ulid, and its field changes carry a `field`
+key — so a frontend `(ulid, field)` selection maps to a real server change. If this shape
+drifts, the canvas selection silently breaks; this test is the guard.
+"""
+
+from __future__ import annotations
+
+
+def _le(client, name: str) -> str:
+    doc = client.get("/api/model").json()
+    return next(e for e in doc["entities"] if e["name"] == name)["id"]
+
+
+def test_preview_diff_has_ulid_and_field_keyed_changes(client):
+    """A modify preview yields a diff whose objects have ulids and whose field changes
+    have `field` keys — the (ulid, field) identity the review view selects over."""
+    r = client.post(
+        "/api/preview",
+        json={
+            "changes": [
+                {"op": "rename_entity", "payload": {"id": _le(client, "trade"), "name": "deal"}}
+            ]
+        },
+    )
+    assert r.status_code == 200
+    doc = r.json()
+    assert doc["ok"]
+    diff = doc["diff"]
+    assert diff["objects"], "a rename should produce at least one changed object"
+
+    obj = diff["objects"][0]
+    # the identity half of a (ulid, field) selection key
+    assert obj["ulid"], "every changed object carries a stable ulid"
+    assert obj["change"] in ("added", "removed", "modified")
+    # the field half — each field change is independently addressable
+    for f in obj["fields"]:
+        assert "field" in f and f["field"], "each field change has a stable field key"
+        assert "severity" in f
+        assert f["severity"] in ("breaking", "additive", "cosmetic", "unmanaged")
+
+
+def test_preview_diff_change_types_cover_the_filter_categories(client):
+    """The review view's filters (additions/modifications/renames/deletions) key off
+    `change` and `renamed`. A rename must be flagged renamed=True with change=modified,
+    so the 'Renames' filter isolates it — the exact field the frontend filters on."""
+    r = client.post(
+        "/api/preview",
+        json={
+            "changes": [
+                {"op": "rename_entity", "payload": {"id": _le(client, "counterparty"), "name": "party"}}
+            ]
+        },
+    )
+    diff = r.json()["diff"]
+    renamed = [o for o in diff["objects"] if o["renamed"]]
+    assert renamed, "a rename must surface as a renamed object for the Renames filter"
+    assert all(o["change"] == "modified" for o in renamed)
+
+
+def test_preview_diff_is_stable_for_selection(client):
+    """The same staged change previewed twice yields the same object ulids — so a
+    per-field selection the user made does not shift under them on a re-preview."""
+    change = [
+        {"op": "rename_entity", "payload": {"id": _le(client, "trade"), "name": "deal"}}
+    ]
+    first = client.post("/api/preview", json={"changes": change}).json()["diff"]
+    second = client.post("/api/preview", json={"changes": change}).json()["diff"]
+    assert [o["ulid"] for o in first["objects"]] == [o["ulid"] for o in second["objects"]]
diff --git a/specs/modelith-semantic-compare-merge-spec.md b/specs/modelith-semantic-compare-merge-spec.md
new file mode 100644
index 0000000..93cf9f6
--- /dev/null
+++ b/specs/modelith-semantic-compare-merge-spec.md
@@ -0,0 +1,208 @@
+# Semantic model compare & merge — one review view across every change flow
+
+## Context
+
+Modelith presents model changes in many flows — staged edits (preview), SME proposals, git-ref diffs,
+drift, reverse-inference acceptance, imports, merge conflicts — but the review experience is fragmented
+and the richest view is trapped in one corner of the Studio Canvas (the SME propose flow). A mature
+commercial modeling tool (Hackolade Studio) ships a 3-pane semantic compare & merge (left / merged /
+right) with per-change accept/reject for additions, modifications, moves and deletions, matching-method
+and display filters, and conflict markers. That is the bar for a data-modeling tool.
+
+This is also the paid wedge made visible. The GTM thesis is that the commercial product is
+drift-enforcement-in-CI, whose hard SLO is "classify a change as breaking/additive/cosmetic and name the
+exact dbt models a breaking change will take down, at PR time." A rich, shared diff/merge view is how
+that classification lands in the product. It ships FREE for local review (the bottom-up funnel); the
+*blocking* CI gate, shared policy, and report stay the paid server boundary. The incumbent gates all of
+this behind a desktop license key; Modelith gives compare/merge away and charges for the team gate.
+
+**The foundation already exists** (validated by codebase exploration):
+- One canonical semantic-diff payload — `ModelDiffDoc`: ULID-keyed, nested object→fields→children,
+  severity-tagged (breaking/additive/cosmetic/unmanaged), per-field before/after. Built by
+  `ModelDiff.to_doc()` (`packages/core/src/mdl_core/diff.py:283`), serialized by `render_json`
+  (`packages/core/src/mdl_core/diff_render.py:29`), mirrored at `canvas/src/types.ts:351`. Server
+  enriches it with `path` (source file per object) and `breaks` (dbt models a breaking change would
+  break) via `_attach_paths`/`_attach_breaks` (`packages/server/src/mdl_server/git_api.py:417,430`).
+- One shape-aware renderer — `canvas/src/sme/DiffView.tsx` (word-diff for prose, +/− chips for lists,
+  scalar before→after, break-impact panel), already prop-driven and API-free.
+- An ER diff overlay — `canvas/src/sme/ModelDiagram.tsx` tints `EntityNode`/`RelationshipEdge` by a
+  `severityByUlid` map.
+- A review shell — `canvas/src/sme/ReviewScreen.tsx` (changes/diagram tabs, route/reviewer panel,
+  conflict banner).
+- VS Code already embeds the Canvas via an iframe webview parameterized by `?query` (`?import=1`),
+  `vscode/src/canvasPanel.ts:59,169` — so a review route renders in VS Code with no new rendering code.
+- Flows already producing `ModelDiffDoc`: preview (`/api/preview` → `PreviewDoc.diff`), propose
+  (`/api/git/propose`), git-diff (`/api/git/diff/model|refs`). A name-keyed variant
+  `diff_models_by_name` (`diff.py:550`) exists for fresh-ULID comparisons (import/compare).
+
+**The gaps this spec closes:**
+1. Selection is per-OBJECT, not per-FIELD, and there is no 3-pane merge / conflict resolution.
+2. Drift (`DriftReport`), reverse-decisions (ledger), and conflicts (`ConflictDoc`) don't speak
+   `ModelDiffDoc` — they need adapters into it (severity vocabulary is already shared).
+3. Import writes-then-git-diffs instead of a semantic "review before it lands."
+4. VS Code has no semantic diff (only native text diff + a drift tree); `compareReversed` is a
+   text-diff outlier.
+5. Accept/apply semantics differ per flow (PR / ledger verdict / reconcile / write) — the view needs a
+   pluggable apply action, not one hardcoded to propose.
+
+Intended outcome: a modeler reviews any model change — staged edit, drift, inferred relationship, erwin
+import, branch comparison, merge conflict — in the SAME rich, filterable, per-change-selectable view,
+in both the Canvas and VS Code.
+
+## Design
+
+### One payload, one component, pluggable sources and sinks
+
+```
+  SOURCES (adapters → ModelDiffDoc)          SHARED VIEW                 SINKS (pluggable apply)
+  preview       ─┐                         ┌───────────────┐            propose → PR
+  git-diff/refs  ┼─ already ModelDiffDoc ─▶│  ReviewView   │──accept──▶ ledger  → verdict write
+  propose       ─┘                         │  DiffView++   │            drift    → --reconcile fold
+  drift  ─────────  DriftReport  ─adapter─▶│  filters      │            import   → write files
+  decisions ──────  Decision[]   ─adapter─▶│  per-field    │            (read-only sources: no sink)
+  import ─────────  diff_by_name ────────▶ │  ER overlay   │
+  conflicts ──────  merge_driver ─3-way──▶ │  3-pane merge │
+                                           └───────────────┘
+```
+
+The whole design is: everything converges on `ModelDiffDoc`, one React component renders it, and each
+flow supplies (a) a fetch that returns the doc and (b) an apply action. `ModelDiffDoc` is not changed in
+shape; where a 3-pane merge needs base/ours/theirs, that is carried as an optional wrapper, not a new
+per-node schema.
+
+### The shared component: `ReviewView`
+
+Generalize `DiffView`/`ReviewScreen` into a reusable `ReviewView` that stays prop-driven and API-free
+(so VS Code hosts it verbatim in the webview). It renders a `ModelDiffDoc` and takes:
+- `diff: ModelDiffDoc` (2-way) or `merge: { base, ours, theirs, conflicts }` (3-way).
+- `selection`: per-FIELD selection — keys are `(ulid, field)` not just object ULIDs, so a user can
+  accept the definition change but reject the domain change on one attribute (the competitor's
+  per-addition/modification/move toggles). Widen the existing staging set (`SmeApp.excluded`,
+  `canvas/src/staging/useStaging.ts`) from object to field granularity; keep the dependency-locking
+  (`dependentKeys`) so changes that must travel together stay linked.
+- `filters`: client-side over the doc — show all / only differences / only additions / only deletions /
+  only modifications / only moves / only conflicts (severity + ChangeType are already on each node).
+  This is the competitor's left rail.
+- `actions: { label, apply(selection) }[]`: the pluggable action bar. Same component drives Propose
+  (PR), Accept (ledger verdict), Reconcile (drift fold), Apply-import (write files). Read-only sources
+  pass none.
+- `mode`: `"unified"` (default 2-pane master-detail, today's view) or `"three-pane"` (base | merged |
+  right, for merge/conflict sources) reusing `FieldDiff` in each pane.
+- ER overlay tab stays (`ModelDiagram` + `severityByUlid`), now available to every source.
+
+Reuse, do not rewrite: `FieldDiff`/`wordDiff` (shape-aware rendering), `ModelDiagram` (ER overlay),
+`ReviewScreen`'s route/reviewer/conflict panels.
+
+### Source adapters → `ModelDiffDoc`
+
+Keep `diff_models` pure; adapters live beside the server enrichers and reuse `_attach_paths`/
+`_attach_breaks` so every source gets source-file + break-impact enrichment.
+- **Drift → ModelDiffDoc**: `drift_to_diff(report, model)` maps each `DriftItem` (name-keyed,
+  manifest-shaped, `packages/reverse/src/mdl_reverse/drift.py`) onto an `ObjectChange`/`FieldChange`
+  (name-keyed, like the `--against` path), preserving `payload` for the reconcile action and the shared
+  severity. New endpoint `GET /api/drift?target=` returns the adapted doc (drift has no server endpoint
+  today — it is CLI/CI-only). Apply action = `mdl drift --reconcile` fold for additive/cosmetic.
+- **Decisions → ModelDiffDoc**: `decisions_to_diff(ledger, model)` turns each proposed `Decision` (an
+  inferred relationship, a stripped key, an SCD2 pattern; `packages/reverse/src/mdl_reverse/ledger.py`)
+  into a proposed `ObjectChange` with its `evidence` as detail. Apply action = `set_verdict`
+  (accept/reject) — reuse `POST /api/decisions/{signal_key}/verdict`.
+- **Import (pre-write) → ModelDiffDoc**: wire `diff_models_by_name(current_model, imported_model)`
+  (`diff.py:550`, name-keyed since imported ULIDs are fresh) so erwin/DDL imports show a semantic diff
+  BEFORE writing. New endpoint `POST /api/import/preview` returns the doc; apply action writes the
+  files. This is the highest-value new flow — today imports write then git-diff.
+- **Conflicts → 3-way (last)**: `merge_model_files` already computes structural base/ours/theirs
+  conflicts (`packages/core/src/mdl_core/merge_driver.py:31`); `conflicts_to_diff` feeds the 3-pane
+  mode. Lowest priority (furthest from the current shape); design the 3-pane contract for it, implement
+  drift/decisions/import first.
+
+### Routing in the Canvas
+
+Add a source-parameterized review route to the hash router (`canvas/src/sme/SmeApp.tsx` already
+hash-routes tabs): `#review?source=drift`, `?source=diff&base=main&head=<branch>`, `?source=import`,
+`?source=decisions`. A small per-source loader fetches the adapted doc and mounts `ReviewView` with the
+right actions. Re-point the architect canvas's raw `<pre>` textual git diff (`ChangesView`,
+`canvas/src/SidePanel.tsx:291`) and `DecisionsView` at the shared component so the direct-write app gets
+the rich review too.
+
+### Surfacing in VS Code (via the existing webview — no new rendering code)
+
+Primary path: commands `modelith.reviewDrift`, `modelith.reviewChanges` (working tree vs base),
+`modelith.reviewImport`, `modelith.reviewDecisions`, each calling `canvas.open(dir, "review&source=…")`
+so `ReviewView` renders in the `modelithCanvas` iframe webview exactly as `?import=1` does today. Keep
+the native Drift tree (`vscode/src/driftView.ts`) and Reverse Review tree (`vscode/src/reverseView.ts`)
+as fast glance-able entry points, and add an "Open in review" action on each that launches the webview
+for the deep-dive. Re-point `modelith.compareReversed` (`vscode/src/extension.ts:1472`) from the native
+text diff of `mdl model render` to the webview review over `diff_models_by_name`→`ModelDiffDoc`.
+
+## Open-core boundary (which parts are free vs paid)
+
+- **Free** (local, complete): the entire `ReviewView` — 2-pane and 3-pane, per-field selection, filters,
+  ER overlay — for reviewing staged edits, imports, local `mdl drift`, branch/ref diffs, and resolving a
+  local merge conflict. This is the bottom-up funnel; it must never be crippled.
+- **Paid (Team, server boundary)**: the *blocking* CI gate that runs the same classification in the
+  org's CI with a shared policy file and a posted PR report; CODEOWNERS-routed proposal review with PR
+  state; hosted SME Studio. The view is free; enforcing it across a team is the wedge.
+
+## Phasing (each phase shippable)
+
+1. **[SHIPPED] Per-field selection + filters + pluggable actions** on the existing 2-pane `ReviewView`,
+   wired to flows that ALREADY produce `ModelDiffDoc` (preview, propose, git-diff/refs). Immediate UX
+   win, no adapters. Modernizes the SME review on its own.
+2. **[SHIPPED] Import pre-write review** (import adapter + canvas route + VS Code command) — highest-value
+   new flow; erwin import becomes "review before it lands," reusing phase 1. Delivered as
+   `POST /api/import/preview` (parse-without-write → enriched `ModelDiffDoc`), the `ReviewScreen`
+   `action` prop + "Apply import" (writes only selected new objects), and the `modelith.reviewImport`
+   command framed in the Reverse Review view, with a one-shot `/api/import/stash` channel so a VS Code
+   `.xml` pre-fills the review.
+3. **Drift review** (drift adapter + `/api/drift` + canvas route + VS Code command + tree "Open in
+   review").
+4. **Decisions review** (decisions adapter + route + VS Code).
+5. **3-pane merge / conflict resolution** (3-pane mode + conflicts adapter) — full compare/merge parity.
+   Last, since it is furthest from the current shape; the common 2-way review ships long before it.
+6. Re-point `compareReversed`; retire the architect `<pre>` git diff for the shared component.
+
+## Critical files
+
+- `canvas/src/sme/DiffView.tsx`, `ReviewScreen.tsx`, `ModelDiagram.tsx` — the component to generalize.
+- `canvas/src/staging/useStaging.ts`, `sme/SmeApp.tsx` — selection state, widened to per-field.
+- `canvas/src/types.ts` — `ModelDiffDoc` and friends (shared contract; optional 3-way wrapper).
+- `canvas/src/api.ts` — new fetches (`/api/drift`, `/api/import/preview`, decisions-as-diff).
+- `packages/server/src/mdl_server/git_api.py` — reuse `_attach_paths`/`_attach_breaks`; new endpoints.
+- `packages/server/src/mdl_server/` — new adapter module(s): `drift_to_diff`, `decisions_to_diff`.
+- `packages/core/src/mdl_core/diff.py` — `diff_models_by_name` (reuse); shared adapter helpers.
+- `vscode/src/extension.ts`, `canvasPanel.ts`, `driftView.ts`, `reverseView.ts` — review commands +
+  `canvas.open(dir, "review&source=…")`; re-point `compareReversed`.
+
+## Verification
+
+- `uv run pytest && uv run ruff check packages/` — adapters produce valid `ModelDiffDoc` the canvas
+  types accept; new endpoints return the right shape; existing diff/drift tests unchanged.
+- `cd canvas && npm run build` (Node 20) — generalized `ReviewView` typechecks; per-field selection +
+  filters render.
+- `cd vscode && npm run typecheck && npm run regression` (Node 20) — review commands registered
+  (Gate 3), all gates green.
+- Manual per phase: open the review from each wired flow in the Canvas AND VS Code (webview); toggle
+  per-field selections + filters; exercise each source's apply action; import shows a semantic diff
+  before writing.
+- Clean-install Docker check (`./sandbox/clean-install/run.sh`) still green (server/import path).
+
+## Non-goals / explicitly rejected
+
+- A monolithic desktop-IDE workspace (Object Browser + Properties pane + central pane): fights the
+  git-native, CLI-first, every-surface-a-client architecture. Modelith's equivalent is Canvas +
+  Inspector + VS Code.
+- An in-app Git panel (branch/commit/PR management inside the tool): anti-strategic. Modelith IS
+  git-native; re-centralizing git state contradicts the core differentiator.
+- Changing `ModelDiffDoc`'s per-node shape. Merge state (base/ours/theirs) is an optional wrapper, not a
+  schema change, so the one payload and one renderer stay singular.
+
+## Risk posture
+
+- Additive and phased: phase 1 modernizes the existing review with no adapters and no new payload; later
+  phases add one source at a time behind the same component. Each phase ships alone.
+- One payload, one renderer: adapters converge on `ModelDiffDoc`, so there is exactly one review UI to
+  maintain; the two intentional deviations (drift name-keying, compareReversed text) are reconciled by
+  adopting the existing `diff_models_by_name`, not by inventing a shape.
+- VS Code reuse via the existing iframe webview + `?query` means the extension gains the full semantic
+  review with essentially no new rendering code — the lowest-risk cross-frontend path.
+- The 3-pane merge/conflict work is isolated to the last phase, so the hard part never blocks the wins.
diff --git a/vscode/package.json b/vscode/package.json
index 88a0ddc..b2fec66 100644
--- a/vscode/package.json
+++ b/vscode/package.json
@@ -2,7 +2,7 @@
   "name": "modelith-vscode",
   "displayName": "Modelith",
   "description": "Ontology-anchored, git-native data modeling for dbt — validate, generate, drift, and the Modelith canvas inside VS Code.",
-  "version": "0.3.18",
+  "version": "0.3.19",
   "publisher": "BosonResearch",
   "license": "Apache-2.0",
   "icon": "icon.png",
@@ -90,11 +90,17 @@
     },
     "views": {
       "modelith": [
+        {
+          "id": "modelithModel",
+          "name": "Model",
+          "icon": "$(symbol-class)",
+          "contextualTitle": "Modelith Model"
+        },
         {
           "id": "modelithConfig",
-          "name": "Warehouse Config",
+          "name": "Warehouse Mapping",
           "icon": "$(settings-gear)",
-          "contextualTitle": "Modelith Warehouse Config"
+          "contextualTitle": "Modelith Warehouse Mapping"
         },
         {
           "id": "modelithReverse",
@@ -235,12 +241,21 @@
       },
       {
         "command": "modelith.configRefresh",
-        "title": "Modelith: Refresh Warehouse Config",
+        "title": "Modelith: Refresh Warehouse Mapping",
         "icon": "$(refresh)"
       },
       {
         "command": "modelith.configFocusView",
-        "title": "Modelith: Show Warehouse Config"
+        "title": "Modelith: Show Warehouse Mapping"
+      },
+      {
+        "command": "modelith.refreshModel",
+        "title": "Modelith: Refresh Model tree",
+        "icon": "$(refresh)"
+      },
+      {
+        "command": "modelith.openModelObject",
+        "title": "Modelith: Open model object"
       },
       {
         "command": "modelith.configOpenProject",
@@ -290,6 +305,11 @@
         "title": "Modelith: Import Erwin XML",
         "icon": "$(cloud-download)"
       },
+      {
+        "command": "modelith.reviewImport",
+        "title": "Modelith: Review Erwin Import",
+        "icon": "$(diff)"
+      },
       {
         "command": "modelith.stopServer",
         "title": "Modelith: Stop Canvas Server"
@@ -494,6 +514,11 @@
           "when": "resourceExtname == .xml",
           "group": "modelith@1"
         },
+        {
+          "command": "modelith.reviewImport",
+          "when": "resourceExtname == .xml",
+          "group": "modelith@2"
+        },
         {
           "command": "modelith.liftModel",
           "when": "resourceExtname == .sql",
@@ -528,6 +553,11 @@
         }
       ],
       "view/title": [
+        {
+          "command": "modelith.refreshModel",
+          "when": "view == modelithModel",
+          "group": "navigation@1"
+        },
         {
           "command": "modelith.configSuggest",
           "when": "view == modelithConfig",
@@ -568,6 +598,11 @@
           "when": "view == modelithReverse",
           "group": "navigation@3"
         },
+        {
+          "command": "modelith.reviewImport",
+          "when": "view == modelithReverse",
+          "group": "navigation@4"
+        },
         {
           "command": "modelith.compareReversed",
           "when": "view == modelithReverse",
diff --git a/vscode/scripts/treeview.test.mjs b/vscode/scripts/treeview.test.mjs
index 8ff9ddf..153eaa8 100644
--- a/vscode/scripts/treeview.test.mjs
+++ b/vscode/scripts/treeview.test.mjs
@@ -20,11 +20,12 @@ const VSCODE_STUB = `
 export const TreeItemCollapsibleState = { None: 0, Collapsed: 1, Expanded: 2 };
 export class ThemeIcon { constructor(id, color) { this.id = id; this.color = color; } }
 export class ThemeColor { constructor(id) { this.id = id; } }
-export class MarkdownString { constructor(v) { this.value = v; } }
+export class MarkdownString { constructor(v) { this.value = v ?? ""; } appendMarkdown(v) { this.value += v; return this; } }
 export class TreeItem {
   constructor(label, collapsibleState) { this.label = label; this.collapsibleState = collapsibleState; }
 }
 export class EventEmitter { constructor(){ this.event = () => ({ dispose(){} }); } fire(){} dispose(){} }
+export const Uri = { file: (p) => ({ fsPath: p, path: p, scheme: "file" }) };
 export const window = { createOutputChannel: () => ({ appendLine(){}, append(){}, show(){} }) };
 export const workspace = { getConfiguration: () => ({ get: () => undefined }) };
 // ./mdl exports the provider imports — never called here (we drive getChildren directly).
@@ -226,6 +227,71 @@ console.log("\nWarehouse Config — unclassified custom prefixes surface for ass
   ok(!top.some((n) => n.kind === "prefixGroup" && n.prefix !== "pres_art_"), "only real unclassified prefixes group");
 }
 
+// --- Model frame: entity → attribute drill-down + click-to-open the YAML ------------
+const { ModelTreeProvider } = await load("modelView.ts");
+console.log("\nModel tree — entities expand to attributes; click opens the YAML");
+{
+  const p = new ModelTreeProvider({ appendLine() {}, append() {}, show() {} });
+  // inject the model dir + entities (bypass the CLI); getChildren renders from them
+  p.modelDir = "/tmp/proj/model";
+  p.entities = [
+    {
+      name: "counterparty",
+      physical_name: "COUNTERPARTY",
+      subject_area: "Trading",
+      definition: "A trading partner.",
+      pattern: null,
+      file: "logical/entities/counterparty.yaml",
+      attributes: [
+        { name: "counterparty_id", physical_name: null, domain: "id_bigint", role: "business_key", nullable: false, is_pk: true },
+        { name: "legal_name", physical_name: null, domain: "string", role: "attribute", nullable: true, is_pk: false },
+      ],
+    },
+    { name: "trade", physical_name: null, subject_area: "Trading", definition: null, pattern: null, file: "logical/entities/trade.yaml", attributes: [] },
+  ];
+
+  // top level = one row per entity, each collapsible when it has attributes
+  const top = p.getChildren();
+  const topItems = top.map((n) => p.getTreeItem(n));
+  ok(labels(topItems).join(",") === "counterparty,trade", `entities render as rows: ${labels(topItems)}`);
+  const cpItem = topItems[0];
+  ok(cpItem.collapsibleState === 1, "an entity with attributes is collapsible (drill-down)");
+  ok(String(cpItem.description).includes("2 attr"), `entity row shows an attribute count: ${cpItem.description}`);
+  ok(topItems[1].collapsibleState === 0, "an entity with no attributes is a leaf");
+
+  // clicking an entity opens its YAML (the openModelObject command with file + name)
+  ok(cpItem.command?.command === "modelith.openModelObject", "entity click opens the model object");
+  ok(String(cpItem.command.arguments[0].fsPath ?? cpItem.command.arguments[0].path).includes("counterparty.yaml"),
+    "entity click targets its own logical YAML");
+
+  // expanding the entity yields its attributes, PK first-classed
+  const cpNode = top[0];
+  const attrRows = p.getChildren(cpNode);
+  const attrItems = attrRows.map((n) => p.getTreeItem(n));
+  ok(labels(attrItems).join(",") === "counterparty_id,legal_name", `attributes render in order: ${labels(attrItems)}`);
+  ok(attrItems[0].iconPath?.id === "key", "the primary-key attribute gets the key icon");
+  ok(attrItems[1].iconPath?.id === "symbol-field", "a non-key attribute gets the field icon");
+  ok(String(attrItems[0].description).includes("pk"), `pk attribute is marked: ${attrItems[0].description}`);
+  // clicking an attribute opens the OWNING entity's YAML
+  ok(attrItems[0].command?.command === "modelith.openModelObject", "attribute click opens the model object");
+  ok(String(attrItems[0].command.arguments[0].fsPath ?? attrItems[0].command.arguments[0].path).includes("counterparty.yaml"),
+    "attribute click opens the owning entity's YAML");
+}
+
+console.log("\nModel tree — resting states");
+{
+  const p = new ModelTreeProvider({ appendLine() {}, append() {}, show() {} });
+  // no model dir -> explains itself
+  const rows = p.getChildren().map((n) => p.getTreeItem(n));
+  ok(String(rows[0].label).includes("No model"), "no-model state explains itself, not blank");
+
+  const p2 = new ModelTreeProvider({ appendLine() {}, append() {}, show() {} });
+  p2.modelDir = "/tmp/proj/model";
+  p2.entities = [];
+  const rows2 = p2.getChildren().map((n) => p2.getTreeItem(n));
+  ok(String(rows2[0].label).includes("No entities"), "empty model points at init/import, not blank");
+}
+
 rmSync(dir, { recursive: true, force: true });
 console.log();
 if (failed) { console.error(`✗ ${failed} assertion(s) failed`); process.exit(1); }
diff --git a/vscode/src/canvasPanel.ts b/vscode/src/canvasPanel.ts
index 18a0e2d..098a58d 100644
--- a/vscode/src/canvasPanel.ts
+++ b/vscode/src/canvasPanel.ts
@@ -56,12 +56,15 @@ export class CanvasManager {
    * wizard the toolbar button opens is already up when the panel appears. When a
    * query is given we rewrite the iframe even on an already-open panel, so the
    * wizard opens whether or not the canvas was already showing. */
-  async open(modelDir: string, query?: string): Promise<void> {
+  async open(modelDir: string, query?: string, path = ""): Promise<void> {
     const cfg = vscode.workspace.getConfiguration("modelith");
     await this.ensureServer(modelDir);
     const local = vscode.Uri.parse(`http://127.0.0.1:${this.port}/`);
     const external = await vscode.env.asExternalUri(local);
-    const url = external.toString().replace(/\/$/, "") + "/" + (query ? `?${query}` : "");
+    // `path` selects which SPA (default "" = architect canvas; "sme" = the SME review app
+    // served at /sme). `query` (e.g. import=1) is appended as-is.
+    const base = external.toString().replace(/\/$/, "") + "/" + path;
+    const url = base + (query ? `?${query}` : "");
 
     if (cfg.get<string>("canvas.display") === "external") {
       await vscode.env.openExternal(vscode.Uri.parse(url));
@@ -87,6 +90,29 @@ export class CanvasManager {
     this.panel.onDidDispose(() => (this.panel = undefined));
   }
 
+  /** Open the SME review app with the erwin import panel. If `content` is given (a .xml the
+   * host read from disk — the webview cannot read local files), stash it on the server first
+   * and open /sme?import=<token> so the panel is pre-filled; otherwise open /sme?import=1 for
+   * a paste-or-pick. */
+  async openImportReview(modelDir: string, content?: string): Promise<void> {
+    await this.ensureServer(modelDir);
+    let query = "import=1";
+    if (content) {
+      try {
+        const res = await fetch(`http://127.0.0.1:${this.port}/api/import/stash`, {
+          method: "POST",
+          headers: { "content-type": "application/json" },
+          body: JSON.stringify({ content }),
+        });
+        const data = (await res.json()) as { ok?: boolean; token?: string };
+        if (data.ok && data.token) query = `import=${encodeURIComponent(data.token)}`;
+      } catch {
+        // stash failed -> fall back to the paste-or-pick panel
+      }
+    }
+    await this.open(modelDir, query, "sme");
+  }
+
   /** Re-hydrate a webview panel VS Code restored after a window reload. The
    * `mdl serve` child process died with the old extension host, so the restored
    * iframe points at a dead port (blank canvas). Adopt the panel, restart the
diff --git a/vscode/src/extension.ts b/vscode/src/extension.ts
index 06e105f..266c97e 100644
--- a/vscode/src/extension.ts
+++ b/vscode/src/extension.ts
@@ -6,6 +6,7 @@ import type { LanguageClient } from "vscode-languageclient/node";
 import { CanvasManager } from "./canvasPanel";
 import { registerChatParticipant } from "./chatParticipant";
 import { ConfigTreeProvider } from "./configView";
+import { ModelTreeProvider, openModelObject } from "./modelView";
 import { DocsProvider } from "./docsView";
 import { DriftCodeActionProvider, DriftManager } from "./driftDiagnostics";
 import { DriftTreeProvider } from "./driftView";
@@ -306,12 +307,32 @@ export async function activate(ctx: vscode.ExtensionContext): Promise<void> {
     stateWatcher.onDidDelete(onStateChange),
   );
 
-  // Warehouse Config: a live view of how the reverse: config classifies every dbt model,
-  // grouped by role, with Suggest/Import in its title bar. The home of the config workflow.
+  // Warehouse Mapping: a live view of how the reverse: config classifies every dbt model
+  // INTO entities, grouped by role, with Suggest/Import in its title bar. Distinct from the
+  // Model tree below (which is the logical model itself); this one answers "how does my
+  // warehouse map to entities?".
   const configTree = new ConfigTreeProvider(out);
   ctx.subscriptions.push(vscode.window.registerTreeDataProvider("modelithConfig", configTree));
   void configTree.refresh();
 
+  // Model: the logical model as an entity → attribute tree; clicking opens the YAML.
+  const modelTree = new ModelTreeProvider(out);
+  ctx.subscriptions.push(vscode.window.registerTreeDataProvider("modelithModel", modelTree));
+  ctx.subscriptions.push(
+    vscode.commands.registerCommand(
+      "modelith.openModelObject",
+      (uri: vscode.Uri, reveal: string) => openModelObject(uri, reveal),
+    ),
+    vscode.commands.registerCommand("modelith.refreshModel", () => modelTree.refresh()),
+    // keep the Model tree current when a logical entity YAML is saved (editor or CLI edit)
+    vscode.workspace.onDidSaveTextDocument((doc) => {
+      if (doc.uri.fsPath.includes(`${path.sep}logical${path.sep}`) && doc.uri.fsPath.endsWith(".yaml")) {
+        void modelTree.refresh();
+      }
+    }),
+  );
+  void modelTree.refresh();
+
   // Active-model indicator: which model dir the panels read. In a multi-model workspace
   // (e.g. an original model/ plus a fresh model_reversed/) auto-discovery picks the
   // shallowest, which may not be the one the user is reviewing. This status-bar item
@@ -619,6 +640,43 @@ export async function activate(ctx: vscode.ExtensionContext): Promise<void> {
     }),
   );
 
+  cmd("modelith.reviewImport", (arg: unknown) =>
+    withModelDir(async (dir) => {
+      if (vscode.workspace.getConfiguration("modelith").get<boolean>("canvas.readOnly")) {
+        void vscode.window.showWarningMessage(
+          "Modelith: the canvas is in read-only mode — turn off modelith.canvas.readOnly to import.",
+        );
+        return;
+      }
+      try {
+        // Resolve an erwin XML: the clicked file (explorer right-click), else a picker. If the
+        // user cancels the picker we still open the panel empty (they can paste).
+        let fileUri = arg instanceof vscode.Uri ? arg : undefined;
+        if (!fileUri) {
+          const picked = await vscode.window.showOpenDialog({
+            title: "Review Erwin XML before import",
+            canSelectMany: false,
+            filters: { "erwin XML": ["xml"] },
+            openLabel: "Review",
+          });
+          fileUri = picked?.[0];
+        }
+        // Read the file here (the webview can't) and hand the content to the SME review app via
+        // a one-shot server stash. An erwin import there is shown as a SEMANTIC diff you review
+        // (filters, per-field selection, break impact) BEFORE anything is written; "Apply
+        // import" writes only the entities you keep.
+        let content: string | undefined;
+        if (fileUri) {
+          content = Buffer.from(await vscode.workspace.fs.readFile(fileUri)).toString("utf8");
+        }
+        await canvas.openImportReview(dir, content);
+      } catch (e) {
+        if (isMdlNotFound(e)) throw e; // let cmd() offer the one-click installer
+        void vscode.window.showErrorMessage(`Modelith canvas: ${e}`);
+      }
+    }),
+  );
+
   // Import an erwin XML export into a fresh Modelith model. An erwin export is a whole
   // model (like a reverse), so this WRITES a model dir via the CLI (10MB-safe, server-
   // free) and opens it — not a canvas paste. Reachable from the palette, the Reverse
diff --git a/vscode/src/modelView.ts b/vscode/src/modelView.ts
new file mode 100644
index 0000000..4976e50
--- /dev/null
+++ b/vscode/src/modelView.ts
@@ -0,0 +1,189 @@
+import * as path from "path";
+import * as vscode from "vscode";
+import { findMdl, findModelDir, runMdl } from "./mdl";
+
+/** The Model tree: the LOGICAL model as an entity → attribute drill-down. Each entity
+ * expands to its attributes (PK marked), and clicking an entity or attribute opens the
+ * entity's `logical/entities/<name>.yaml` at the right line. This is the "what is my
+ * model" view — distinct from the Warehouse Mapping tree, which shows how dbt models
+ * classify into entities. Fed by `mdl model tree --format json`, so it always reflects
+ * the committed model, never a stale copy. */
+
+export interface TreeAttribute {
+  name: string;
+  physical_name: string | null;
+  domain: string | null;
+  role: string;
+  nullable: boolean;
+  is_pk: boolean;
+}
+export interface TreeEntity {
+  name: string;
+  physical_name: string | null;
+  subject_area: string | null;
+  definition: string | null;
+  pattern: string | null;
+  file: string | null;
+  attributes: TreeAttribute[];
+}
+
+type Node = EntityNode | AttributeNode | StatusNode;
+interface EntityNode {
+  kind: "entity";
+  entity: TreeEntity;
+}
+interface AttributeNode {
+  kind: "attribute";
+  entity: TreeEntity;
+  attr: TreeAttribute;
+}
+/** A resting row when the model is empty / unreadable, so the pane explains itself
+ * instead of rendering blank. */
+interface StatusNode {
+  kind: "status";
+  label: string;
+  icon: vscode.ThemeIcon;
+}
+
+export class ModelTreeProvider implements vscode.TreeDataProvider<Node> {
+  private readonly emitter = new vscode.EventEmitter<Node | undefined>();
+  readonly onDidChangeTreeData = this.emitter.event;
+  private entities: TreeEntity[] = [];
+  private modelDir: string | undefined;
+
+  constructor(private readonly out: vscode.OutputChannel) {}
+
+  /** Re-read the model from `mdl model tree --format json`. */
+  async refresh(): Promise<void> {
+    const dir = await findModelDir();
+    this.modelDir = dir;
+    if (!dir) {
+      this.entities = [];
+      this.emitter.fire(undefined);
+      return;
+    }
+    try {
+      const bin = await findMdl(dir);
+      const r = await runMdl(bin, ["model", "tree", "-m", ".", "--format", "json"], dir);
+      this.entities =
+        r.code === 0 && r.stdout.trim()
+          ? ((JSON.parse(r.stdout) as { entities?: TreeEntity[] }).entities ?? [])
+          : [];
+    } catch (e) {
+      this.out.appendLine(`[model] could not read the model tree: ${e}`);
+      this.entities = [];
+    }
+    this.emitter.fire(undefined);
+  }
+
+  getTreeItem(node: Node): vscode.TreeItem {
+    if (node.kind === "status") {
+      const ti = new vscode.TreeItem(node.label, vscode.TreeItemCollapsibleState.None);
+      ti.iconPath = node.icon;
+      return ti;
+    }
+    if (node.kind === "entity") {
+      const e = node.entity;
+      const ti = new vscode.TreeItem(
+        e.name,
+        e.attributes.length
+          ? vscode.TreeItemCollapsibleState.Collapsed
+          : vscode.TreeItemCollapsibleState.None,
+      );
+      ti.iconPath = new vscode.ThemeIcon("symbol-class");
+      const bits: string[] = [`${e.attributes.length} attr`];
+      if (e.subject_area) bits.push(e.subject_area);
+      if (e.pattern) bits.push(e.pattern);
+      ti.description = bits.join(" · ");
+      const md = new vscode.MarkdownString();
+      md.appendMarkdown(`**${e.name}**${e.physical_name ? ` · \`${e.physical_name}\`` : ""}\n\n`);
+      if (e.definition) md.appendMarkdown(`${e.definition}\n\n`);
+      if (e.subject_area) md.appendMarkdown(`Subject area: ${e.subject_area}\n\n`);
+      ti.tooltip = md;
+      ti.contextValue = "modelEntity";
+      // click opens the entity's logical YAML
+      ti.command = this.openCommand(e, e.name);
+      return ti;
+    }
+    // attribute row
+    const a = node.attr;
+    const ti = new vscode.TreeItem(a.name, vscode.TreeItemCollapsibleState.None);
+    ti.iconPath = new vscode.ThemeIcon(a.is_pk ? "key" : "symbol-field");
+    const bits: string[] = [];
+    if (a.domain) bits.push(a.domain);
+    if (a.is_pk) bits.push("pk");
+    if (!a.nullable) bits.push("not null");
+    ti.description = bits.join(" · ");
+    if (a.physical_name) {
+      const md = new vscode.MarkdownString();
+      md.appendMarkdown(`**${a.name}** · \`${a.physical_name}\`\n\n${a.domain ?? ""}`);
+      ti.tooltip = md;
+    }
+    ti.contextValue = "modelAttribute";
+    // click opens the owning entity's YAML at the attribute line
+    ti.command = this.openCommand(node.entity, a.name);
+    return ti;
+  }
+
+  /** A command that opens the entity's source YAML, revealing the given search term
+   * (the entity or attribute name) so the cursor lands near it. */
+  private openCommand(entity: TreeEntity, reveal: string): vscode.Command | undefined {
+    if (!entity.file || !this.modelDir) return undefined;
+    const uri = vscode.Uri.file(path.join(this.modelDir, entity.file));
+    return {
+      command: "modelith.openModelObject",
+      title: "Open in the model YAML",
+      arguments: [uri, reveal],
+    };
+  }
+
+  getChildren(node?: Node): Node[] {
+    if (!node) {
+      if (!this.modelDir) {
+        return [
+          {
+            kind: "status",
+            label: "No model in this workspace",
+            icon: new vscode.ThemeIcon("info"),
+          },
+        ];
+      }
+      if (!this.entities.length) {
+        return [
+          {
+            kind: "status",
+            label: "No entities yet — run mdl init or import a model",
+            icon: new vscode.ThemeIcon("info"),
+          },
+        ];
+      }
+      return this.entities.map((entity) => ({ kind: "entity" as const, entity }));
+    }
+    if (node.kind === "entity") {
+      return node.entity.attributes.map((attr) => ({
+        kind: "attribute" as const,
+        entity: node.entity,
+        attr,
+      }));
+    }
+    return [];
+  }
+}
+
+/** Open a model object's YAML and move the cursor to the first line mentioning `reveal`
+ * (the entity or attribute name), so a click lands where the user expected. */
+export async function openModelObject(uri: vscode.Uri, reveal: string): Promise<void> {
+  const doc = await vscode.workspace.openTextDocument(uri);
+  const editor = await vscode.window.showTextDocument(doc);
+  const text = doc.getText();
+  // match `name: <reveal>` first (the authored field), else a bare mention
+  const idx =
+    text.indexOf(`: ${reveal}\n`) >= 0
+      ? text.indexOf(`: ${reveal}\n`)
+      : text.indexOf(reveal);
+  if (idx >= 0) {
+    const pos = doc.positionAt(idx);
+    editor.selection = new vscode.Selection(pos, pos);
+    editor.revealRange(new vscode.Range(pos, pos), vscode.TextEditorRevealType.InCenter);
+  }
+}