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taodengandClaude Opus 4.7
8ae77c3ae3
cold-audit catch from 2026-05-23
Cold-audit Finding 7 (P2 cache correctness). ADR 0005 § Cache key
composition (v1.0) listed 7 fields. ADR 0003 § Optional fields added
`max_tokens`, `top_p`, `stop`, `tool_choice` as IR-carried fields
that affect model output. Pre-D15 cache key omitted those 4 —
identical IRs differing only in those fields collided on the same
cache key but produced legitimately different outputs. Concrete
hazard: a request with `max_tokens: 100` could receive a cached
response generated by `max_tokens: 4000` — wrong content (truncated
or unexpectedly extended).
Coordinated change across two layers, single commit per the ADR-with-
code pattern established by D11:
1. docs/adr/0005-cache-cross-provider.md — Amendment 2 (top of doc,
matching D11 Amendment 1 placement convention)
- Documents the 4 missing fields + concrete failure mode
- Expands the v1.0 cache key composition spec
- Documents the `?? null` collapsing semantics (explicit-null
equals absent — consistent with existing temperature/response_format)
- Adds forward-looking note: future IR field additions must be
evaluated for cache-key inclusion at addition time; default is
include unless explicit rationale documents safe omission
2. lib/cache/keys.mjs — append the 4 fields to `keyObj` after the
existing 7 (preserves field ordering; pre-D15 cache entries are
forced misses on first request — schema forward-compatible)
- `max_tokens: ir.max_tokens ?? null`
- `top_p: ir.top_p ?? null`
- `stop: ir.stop ?? null`
- `tool_choice: ir.tool_choice ?? null`
- Updated file-level docblock + function-level JSDoc + @param ir
enumeration to reflect new schema (the @param fix also closes a
pre-existing partial-list issue that omitted cache_control)
3. test-features.mjs — 5 new tests in Suite 9:
- max_tokens differs → different key
- top_p differs → different key
- stop differs → different key
- tool_choice differs → different key (covers string-form
`'auto'` vs `'none'`; object-form coverage left for future
defense-in-depth — slot existence is verified by the string case)
- Both-absent stability check (`?? null` collapsing produces
identical keys for omitted-vs-omitted)
Tests: 292 → 297 (+5). No hash constants pinned in existing tests
(grep verified) so no pre-D15 tests required updating; assertions
were already shape-based (`assert.equal` / `assert.notEqual` on
hash strings, never specific hex values).
Authority:
- ADR 0003 § Optional fields — source of the 4 IR field definitions
https://github.com/dtzp555-max/olp/blob/main/docs/adr/0003-intermediate-representation.md
- ADR 0005's stated invariant: "different output → different cache
entry" — the addition restores compliance with this invariant
- OpenAI /v1/chat/completions spec — confirms the 4 fields affect
output:
https://platform.openai.com/docs/api-reference/chat/create
- ALIGNMENT.md Rule 2(c) spirit — ADR amendment + code change land
in same merge (D11 precedent established this pattern for
Provider-contract changes; D15 applies same pattern for cache-key
schema changes)
- CC 开发铁律 v1.6 § 10.x — Cold Audit caught this; diff-review pass
that approved original ADR 0005 did not cross-reference all ADR
0003 optional fields
Reviewer (Iron Rule v1.6 § 10.x Mode A, fresh-context opus, independent
of drafter): APPROVE_WITH_MINOR. Folded the one minor (`@param ir`
JSDoc stale partial list) before commit — same JSDoc precision logic
that drove D11's B1 fold-in. Two remaining non-blocking suggestions
(tool_choice object-form test coverage; D11-vs-D15 amendment structure
template) tracked as defense-in-depth opportunities, not required for
spec compliance.
Reviewer's highest-value verification: field ordering preserved.
keyObj at lib/cache/keys.mjs:203-217 reads exactly:
`{provider, model, messages, tools, temperature, response_format,
cache_control, max_tokens, top_p, stop, tool_choice}` — existing 7
in unchanged positions, 4 new appended at end. JSON.stringify on
Node 18+ preserves insertion order; SHA-256 hash deterministic
across runs.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>