diff --git a/.changeset/27455-platform-eval-self-agreement.md b/.changeset/27455-platform-eval-self-agreement.md
new file mode 100644
index 00000000000..d1cfe75519e
--- /dev/null
+++ b/.changeset/27455-platform-eval-self-agreement.md
@@ -0,0 +1,12 @@
+---
+'@objectstack/skills': patch
+---
+
+fix(skills): four objectstack-platform eval cases agree with their own `must_not_contain` assertions
+
+Clause-②: no
+Metadata-protocol: none
+
+- **Before.** In `skills/objectstack-platform/evals/config-plugins-ops.json`, four cases refused a string their own `expected_output` spelled: eval 1 `tableName`, eval 2 `data:beforeInsert` and `onInstall`, eval 4 `@objectstack/adapter-`, eval 7 `role:` and `admin_full_access`. Graded against those assertions, the reference answer itself scored wrong, so the eval could not tell a good configuration, plugin or operations answer from a bad one.
+- **Now.** Judged per case from the skill text. Eval 1 narrows its assertion to the key spelling `tableName:` (the skill's own warning, "never set `tableName`", names the bare word; the wrong form is the key beside `workflows:` / `approvals:`). Eval 2 says "a `data:*` kernel hook registers and never fires" and "no install / enable / disable hooks" instead of spelling the phantom hook and method. Eval 4 says "no `adapter-*` packages exist". Eval 7 names the refused alias as `role` (the key spelling `role:` stays refused) and says "no platform set" (the skill's term for a set such as the refused platform-admin one). No assertion is deleted, no case added or removed; the file shrinks by 13 tokens under its unchanged ceiling.
+- No schema, key or behaviour changes.
diff --git a/skills/objectstack-platform/evals/config-plugins-ops.json b/skills/objectstack-platform/evals/config-plugins-ops.json
index 599f1e690a8..8664aa018f2 100644
--- a/skills/objectstack-platform/evals/config-plugins-ops.json
+++ b/skills/objectstack-platform/evals/config-plugins-ops.json
@@ -8,13 +8,13 @@
       "files": [],
       "assertions": {
         "must_contain": ["defineStack", "manifest", "engines", "Object.values("],
-        "must_not_contain": ["workflows:", "approvals:", "tableName"]
+        "must_not_contain": ["workflows:", "approvals:", "tableName:"]
       }
     },
     {
       "id": 2,
       "prompt": "Build a plugin registering an `audit` service that records every metadata reload and every `task` insert.",
-      "expected_output": "A `Plugin` with `name`, `init(ctx)` calling `ctx.registerService('audit', ...)` and `ctx.hook('metadata:reloaded', ...)`, `start(ctx)`, `destroy()`. Record events are not kernel hooks — `ctx.hook('data:beforeInsert')` registers and never fires — so the task insert is a data hook (objectstack-data). No `onInstall` / `onEnable` / `onDisable`.",
+      "expected_output": "A `Plugin` with `name`, `init(ctx)` calling `ctx.registerService('audit', ...)` and `ctx.hook('metadata:reloaded', ...)`, `start(ctx)`, `destroy()`. Record events are not kernel hooks — a `data:*` kernel hook registers and never fires — so the task insert is a data hook (objectstack-data). No install / enable / disable hooks.",
       "files": [],
       "assertions": {
         "must_contain": ["registerService", "ctx.hook(", "metadata:reloaded", "init(", "destroy"],
@@ -34,7 +34,7 @@
     {
       "id": 4,
       "prompt": "We deploy on Vercel serverless functions in our own Hono app; mount the ObjectStack API under /api.",
-      "expected_output": "`createHonoApp({ kernel })` from `@objectstack/hono` (prefix defaults to `/api`) in the host app — `HonoServerPlugin` only when ObjectStack owns the server; `LiteKernel` for a cold-start-sensitive host; `/auth/*` follows the auth `basePath`, not `prefix`; no `@objectstack/adapter-*` packages exist.",
+      "expected_output": "`createHonoApp({ kernel })` from `@objectstack/hono` (prefix defaults to `/api`) in the host app — `HonoServerPlugin` only when ObjectStack owns the server; `LiteKernel` for a cold-start-sensitive host; `/auth/*` follows the auth `basePath`, not `prefix`; no `adapter-*` packages exist.",
       "files": [],
       "assertions": {
         "must_contain": ["createHonoApp", "@objectstack/hono", "LiteKernel"],
@@ -64,7 +64,7 @@
     {
       "id": 7,
       "prompt": "Prepare a demo of our contracts app: the seed assigns matters to 'Legal Counsel 1' and 'Paralegal 1', and the demo opens signed in as Legal Counsel 1.",
-      "expected_output": "Both go in `demoStaff` — `name` as the seed references them, `email`, a `position` / `permissionSets` the stack declares — and `os dev` creates the accounts with the seed password: no `password` key, no `role:` alias, no platform set like `admin_full_access`, no hand-written `sys_user` seed row. `devLogins` creates nothing (at most a banner entry); `os build` drops `demoStaff`; production creates no demo account.",
+      "expected_output": "Both go in `demoStaff` — `name` as the seed references them, `email`, a `position` / `permissionSets` the stack declares — and `os dev` creates the accounts with the seed password: no `password` key, no `role` alias, no platform set, no hand-written `sys_user` seed row. `devLogins` creates nothing (at most a banner entry); `os build` drops `demoStaff`; production creates no demo account.",
       "files": [],
       "assertions": {
         "must_contain": ["demoStaff", "position", "permissionSets", "os dev"],