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Hoisting a mid-conversation `system`/`developer` message into the top-level `system` field carried its `cache_control` marker along. Anthropic assembles the cache prefix as tools -> system -> messages, so the marker ended the cached prefix at the system block and left the accumulated conversation without a breakpoint: that turn was billed as fresh input and the next one rebuilt the cache. `relocateHoistedCacheBoundary` moves the marker to the nearest preceding block that can carry a breakpoint, skipping thinking blocks, empty text and anything the upstream normalisation discards or empties out. If that block already carries the client's own marker, both are kept - unless the hoisted one, now ahead of the target in `system[]`, would put a 5m breakpoint before a 1h one, which Anthropic rejects; it is dropped in that case. Either way the breakpoint count never grows. normalizeClaudeUpstreamMessages rewrites tool_result and inlined file/document blocks into plain text after the hoist, which silently discarded any marker on them - including a relocated one. The replacement block now inherits it. Both hoisting implementations share the helper; a fix touching only claudeSystemRole.ts would leave extractSystemMessagesToBody broken, and the native Claude path reaches the former through normalizeClaudeUpstreamMessages. Capability-gated hoisting for strict providers (#7293) is unaffected. Fixes #9436 Co-authored-by: LeonG606 <leongudat01@gmail.com> Co-authored-by: Diego Rodrigues de Sa e Souza <diegosouza.pw@gmail.com>
changelog.d/ — changelog fragments
A PR never edits CHANGELOG.md directly during the cycle. Instead it adds ONE new
file here — its changelog entry as a fragment. Two PRs never touch the same file, so
changelog merge conflicts (the "CHANGELOG-eat" cascade that forced a re-sync push + full
CI re-run after every sibling merge) are structurally impossible.
Convention
| Directory | Aggregates under |
|---|---|
features/ |
### ✨ New Features |
fixes/ |
### 🐛 Bug Fixes |
maintenance/ |
### 📝 Maintenance |
- Filename:
<PR-number>-<short-slug>.md(e.g.fixes/6700-dockerfile-better-sqlite3.md). The PR number prefix keeps aggregation order deterministic. - Content: the exact bullet line(s) that should land in
CHANGELOG.md, starting with-. Multi-line (continuation) bullets are fine. Keep the repo's credit format:(#PR — thanks @user). - One fragment per PR (rarely more, e.g. a PR that both fixes and adds).
Example
changelog.d/fixes/6496-cloudflare-relay-worker-syntax.md:
- **fix(providers):** Cloudflare relay Worker deploys use Service Worker syntax with `body_part` metadata ([#6496](https://github.com/diegosouzapw/OmniRoute/pull/6496)) — thanks @SeaXen
Aggregation
The release captain (or /generate-release) folds all fragments into CHANGELOG.md and
deletes them:
node scripts/release/aggregate-changelog.mjs # write + delete fragments
node scripts/release/aggregate-changelog.mjs --dry-run # preview only
Fragment well-formedness is enforced by npm run check:changelog-integrity (the same
gate that guards against CHANGELOG-eat for legacy direct edits).