Extend verify_test_fidelity.py MAPPING to cover all packages/chat/src/*.test.ts

[patrick-chinchill]

Problem

MAPPING in scripts/verify_test_fidelity.py currently covers 8 of 17 packages/chat/src/*.test.ts files. The 9 unmapped files (~229 TS it() cases) are not checked by --strict, so the "0 missing" claim is really "0 missing for mapped core files" (see 0.4.26.2 CHANGELOG wording after PR #72 follow-up commit).

Unmapped files

• packages/chat/src/cards.test.ts
• packages/chat/src/modals.test.ts
• packages/chat/src/message.test.ts
• packages/chat/src/message-history.test.ts
• packages/chat/src/jsx-runtime.test.ts
• packages/chat/src/errors.test.ts
• packages/chat/src/emoji.test.ts
• packages/chat/src/chat-singleton.test.ts
• packages/chat/src/logger.test.ts

Proposed work

1. For each unmapped TS file, find the Python counterpart (if any) — e.g. grep -rln "from chat_sdk.cards" tests/.
2. Add a MAPPING entry for each file with a Python equivalent.
3. Run verify_test_fidelity.py --strict and either (a) port any newly-surfaced gaps, or (b) document an intentional divergence in docs/UPSTREAM_SYNC.md.
4. Drop the "for mapped core files" qualifier in CHANGELOG.md, CLAUDE.md, scripts/fidelity_baseline.json, and docs/UPSTREAM_SYNC.md once MAPPING covers all 17 files.

Why it matters

Strict fidelity is only as meaningful as the mapping that feeds it. Extending to the full core package is the durable fix for the accuracy gap flagged in PR #72.

Related

• PR ci(fidelity): ratchet-down baseline + wire into lint.yml #72 — qualified the claim (interim fix)