Add shadow semantic replay for direct named ESM imports

[jununfly]

This was generated by AI during triage.

Parent

• Roadmap node: 1-3-2. Reference disambiguation semantic migration slices
• Plan: docs/plans/2026-06-25-rust-hybrid-direct-named-import-semantic-replay-plan.md

What to build

Add a shadow-only semantic replay slice for direct ESM named import/export bindings. The replay path should compare protocol/Rust-owned direct named binding decisions against the existing TypeScript final reference-resolution result, while keeping TypeScript as the final graph-output owner.

This slice is limited to repo-local direct named ESM bindings such as import { foo } from "./x" resolving to a direct exported foo in the target file. It must not change final reference disambiguation semantics, graph output, SQLite schema, or package resolution behavior.

Acceptance criteria

• rust-hybrid profile artifacts include a semanticReplay diagnostic bucket.
• The bucket reports eligible, compared, equivalent, mismatch, and skipped counts.
• Direct named import/export replay records mismatch reasons using: import-target-unresolved, export-symbol-missing, multiple-export-candidates, ts-unresolved-rust-resolved, ts-resolved-rust-unresolved, different-target-node, and different-resolution-method.
• A matching direct named import/export fixture records equivalent replay evidence.
• At least one taxonomy failure path is covered by a deterministic test.
• GraphStats/final graph output remain unchanged for the covered fixture.
• Replay state is not written to SQLite.
• Roadmap node 1-3-2 is updated with the implementation result.

Blocked by

None - can start immediately.

[jununfly]

This was generated by AI during triage.

Closing as implemented. Added semanticReplay profile diagnostics for direct named ESM import shadow replay, including equivalent replay counts and taxonomy samples for unresolved export symbols. This remains shadow-only: TypeScript/final graph output ownership is unchanged and no replay state is written to SQLite.

Verification:

• npm run build
• npx vitest run __tests__/rust-index-engine-cli.test.ts
• npx vitest run __tests__/candidate-protocol.test.ts
• python /Users/bilibili/.codex/skills/zj-roadmap-driven/roadmap_cli.py validate docs/plans/2026-06-24-rust-hybrid-indexing-ownership-roadmap.json
• git diff --check