fix(claude): stabilize Responses instructions for Muse/Go prompt cache - #4052
fix(claude): stabilize Responses instructions for Muse/Go prompt cache#4052Warexpor wants to merge 3 commits into
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Strip growing <total_tokens> and TaskCreate footers from Claude Code system text before it becomes Responses instructions, and reattach the latest notice as a trailing input message so Muse/Go prefix cache can hit. Paper and measured rates live under docs/claude-instructions-cache-stabilize/. Co-authored-by: Warexpor <warexpor@gmail.com>
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drafts: true📝 WalkthroughWalkthroughThe change stabilizes Claude Code system instructions before Anthropic-to-Responses translation. It removes dynamic token footers and TaskCreate notices, preserves the latest notice as trailing user input, adds integration tests, updates test-layout mappings, and documents measured cache results. ChangesClaude instruction cache stabilization
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to The change improves prompt-cache stability, but it can alter legitimate system instructions and still misses cache affinity for requests without a user ID. These issues should be resolved before merge. Sequence Diagram(s)sequenceDiagram
participant ClaudeCode
participant anthropicToResponsesTranslation
participant stabilizeClaudeInstructionsForPromptCache
participant ResponsesRequest
ClaudeCode->>anthropicToResponsesTranslation: Anthropic system and user messages
anthropicToResponsesTranslation->>stabilizeClaudeInstructionsForPromptCache: joined system instructions
stabilizeClaudeInstructionsForPromptCache-->>anthropicToResponsesTranslation: stable instructions and latest dynamicNotice
anthropicToResponsesTranslation->>ResponsesRequest: cleaned instructions
anthropicToResponsesTranslation->>ResponsesRequest: trailing user input_text notice
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 3 files. (3 skipped: 3 unsupported.) ✨ Finishing Touches🧪 Generate unit tests (beta)
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리뷰 · 우선순위 70 / 80이 PR은 Claude Code가 OpenCodex를 거쳐 Muse/Go(Responses)로 갈 때, 매 턴마다 커지는 시스템 푸터가 캐시를 깨는 구멍을 막는 수정입니다. 지금 체크아웃 기준으로 동작은 이렇게 이어집니다. 지금 HEAD의 같은 함수 바로 아래(약 363–395행)에는 이미 라인 9-13 / TOTAL_TOKENS_RE - 메인테이너의 판단이 필요한 지점
너의 추천 이 댓글은 grok-bot이 작성했습니다 |
The Claude Code path still uses metadata.user_id. Desktop has no session id, so the fallback key now fingerprints the cacheable prefix instead of raw systemParts that still contain <total_tokens> / TaskCreate footers. Co-authored-by: Warexpor <warexpor@gmail.com>
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Inline comments:
In `@src/claude/inbound-cache-stabilize.ts`:
- Line 9: Restrict the transformations in TOTAL_TOKENS_RE and
TASKCREATE_NUDGE_RE to verified canonical Claude Code footer lines and the exact
nudge paragraph, rather than matching arbitrary substrings in system content.
Preserve literal total_tokens tags and text surrounding near-match nudges, and
add regression coverage for both cases.
In `@src/claude/inbound.ts`:
- Around line 354-355: Store the stabilized system text produced by
stabilizeClaudeInstructionsForPromptCache once in the inbound request flow, use
it for both body.instructions and the metadata-less fallback cache-key hash, and
add a regression test covering different total_tokens footers without
metadata.user_id that verifies the prompt cache key remains unchanged.
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docs/claude-instructions-cache-stabilize/PAPER_OCXFIX.pdfis excluded by!**/*.pdf
📒 Files selected for processing (6)
docs/claude-instructions-cache-stabilize/README.mdscripts/test-layout/layout.jsonsrc/claude/inbound-cache-stabilize.tssrc/claude/inbound.tstests/claude-integration/claude-inbound-cache-stabilize.test.tstests/fixtures/test-layout-expected.json
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Restrict strip to standalone integer <total_tokens> footer lines and the exact Claude Code reminder paragraph so inline docs of those tags or TaskCreate stay in instructions. Co-authored-by: Warexpor <warexpor@gmail.com>
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Hey @lidge-jun @Ingwannu — gentle ping when you have a minute. This is the Claude Code → Responses Fork CI on the latest pushes is stuck on Approve and run workflows ( |
Bring docs/claude-instructions-cache-stabilize/ onto the fork alongside the Desktop key + canonical-notice follow-ups cherry-picked from lidge-jun#4052.
3 participants
Summary
instructions. Growing<total_tokens>/ TaskCreate footers churn that prefix and collapse Muse/Go prompt-cache hit rates.instructionsand reattaches the latest notice as a trailinginputmessage (src/claude/inbound-cache-stabilize.ts, wired frominbound.ts).prompt_cache_keyfallback (nometadata.user_id) now hashes stabilized instructions so key routing tracks the cacheable prefix (f027fba). Claude Code still uses the session key frommetadata.user_id.docs/claude-instructions-cache-stabilize/PAPER_OCXFIX.pdf.SOCKS5 / Go session-header work is intentionally out of scope. Related Anthropic thinking-replay issue #3719 stays open (link only).
Verification
bun test tests/claude-integration/claude-inbound-cache-stabilize.test.ts— 7 pass (initial)bun testinbound-cache-stabilize + inbound — 53 pass;bun run typecheck— passtest:changed4933 pass / 1 skip; privacy scan passChecklist
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