refactor: facade ObjectRepository and ScopedContext in engine.ts with the same codemod (about 700 lines), as the ObjectQL class already is #30052

domain:server#6 · os-support-ai · session_01WGufzibcN9oHa8kDbTTnL5

Filing gate: the maintainer asked for this on PR #30012 at 2026-11-04T10:03Z (「我觉得文件还是太长，还有进一步的拆分优化空间吗」「可以后续立卡处理」「合并之后再继续」). The facades are merged: engine.ts as 237f513 (#30012) and protocol.ts as 48914fd (#29998). Estimates come from the #29986 / #29985 dev reports. ⛔ Not a claim. Triage sets the grade and the lane (devx or server).

Business reason: #30012 facaded only the ObjectQL class. ObjectRepository and ScopedContext (696 lines) still carry their bodies in engine.ts. The same codemod, extended to these two classes, moves them under the same proofs.
Reader who acts: the owner of scripts/codemod-split-engine.mjs.

What to do

• Extend the codemod to the two classes, then regenerate and prove: byte-identity, determinism, public .d.ts EQUAL, and suites at base counts.
• Add any by-path reader the move breaks to the PR, as refactor(objectql): generate the engine.ts section split with a deterministic codemod #30012 did (federated READERS, core CALLERS, the census register).
• The tooling: a structural gate that refuses any method body in a facade file once protocol.ts and engine.ts land in facade form (ruling 6624258595) #30019 gate rows for any exceptions go in the same PR.
  Dedupe: ObjectRepository facade, ScopedContext split. New.