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fix(gemini): resolve Google model capabilities through ModelRegistry#1276

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JerrettDavis merged 1 commit into
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julienguarino:fix/google-model-capability-resolution
Jun 27, 2026
Merged

fix(gemini): resolve Google model capabilities through ModelRegistry#1276
JerrettDavis merged 1 commit into
headroomlabs-ai:mainfrom
julienguarino:fix/google-model-capability-resolution

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@julienguarino

@julienguarino julienguarino commented Jun 22, 2026

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Description

Google model capability lookup was still tied to static provider tables for support checks and context limits. That made plausible future Gemini model ids fail token counting or context lookup even when they clearly belonged to the Google provider family.

This change adds a tolerant ModelRegistry.resolve() runtime lookup path and routes the Google provider through it. Exact built-in registry matches still win first, LiteLLM pricing metadata can supply live limits when available, and provider-scoped family fallbacks cover future Gemini ids without letting Google claim unrelated models.

Type of Change

  • Bug fix (non-breaking change that fixes an issue)
  • New feature (non-breaking change that adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to change)
  • Documentation update
  • Performance improvement
  • Code refactoring (no functional changes)

Changes Made

  • Added ModelRegistry.resolve() as a tolerant runtime capability resolver.
  • Added provider-scoped Google/Gemini family fallbacks for plausible future model ids.
  • Added support for LiteLLM-style gemini/gemini-... model ids in provider inference and family fallback matching.
  • Updated GoogleProvider.supports_model() and GoogleProvider.get_context_limit() to use the shared model registry path.
  • Added regression tests for future Gemini ids, legacy Gemini context limits, and unrelated model rejection.

Testing

  • Unit tests pass (pytest)
  • Linting passes (ruff check .)
  • Type checking passes (mypy headroom)
  • New tests added for new functionality
  • Manual testing performed

Test Output

uv run --no-project --with pytest --with opentelemetry-api --with pydantic --with tiktoken --with litellm --with click --with rich python -B -m pytest tests/test_provider_model_fallback.py tests/test_models.py

65 passed

uv run --no-project --with ruff ruff check headroom/models/registry.py headroom/providers/google.py tests/test_provider_model_fallback.py tests/test_models.py

All checks passed!

uv run --no-project --with ruff ruff format --check headroom/models/registry.py headroom/providers/google.py tests/test_provider_model_fallback.py tests/test_models.py

4 files already formatted

Real Behavior Proof

  • Environment: macOS arm64 local checkout, Python 3.13 virtualenv for editable install; deployed smoke test in a Cloud Run staging service using an earlier commit from this fork branch before the review follow-up.
  • Exact command / steps: installed headroom-ai[langchain] from the fork branch in the staging service, triggered long-context requests that activate Headroom's LangChain compression path, then checked Cloud Run logs after 2026-06-22 12:20 Europe/Paris.
  • Observed result: Headroom initialized successfully, compressed conversation memory (23255 -> 5618 chars), and no logs matched the previous model-resolution failure signatures (not recognized as a Google model, Unknown context limit).
  • Not tested: staging was not rerun after the gemini/gemini-... review follow-up; that prefix path is covered by local regression tests. Full repository uv run pytest on local macOS is currently blocked by a native maturin/esaxx-rs compile failure (fatal error: 'cstdint' file not found). Type checking was not run.

Review Readiness

  • I have performed a self-review
  • This PR is ready for human review

Checklist

  • My code follows the project's style guidelines
  • I have performed a self-review of my code
  • I have commented my code, particularly in hard-to-understand areas
  • I have made corresponding changes to the documentation
  • My changes generate no new warnings
  • I have added tests that prove my fix is effective or that my feature works
  • New and existing unit tests pass locally with my changes
  • I have updated the CHANGELOG.md if applicable

Screenshots (if applicable)

N/A

Additional Notes

  • Documentation changes are not included because this is a runtime compatibility fix with no public API or user-facing configuration change.
  • Full local test execution should be retried in CI or a Linux environment where the native Rust extension build is healthy.

@github-actions

github-actions Bot commented Jun 22, 2026

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PR governance

This PR follows the template and is marked ready for human review.

@github-actions github-actions Bot added status: has conflicts Pull request has merge conflicts with the base branch status: needs author action Pull request body or readiness checklist still needs author updates labels Jun 22, 2026
@julienguarino julienguarino force-pushed the fix/google-model-capability-resolution branch from 3e307af to ace2733 Compare June 22, 2026 08:39
@github-actions github-actions Bot removed the status: has conflicts Pull request has merge conflicts with the base branch label Jun 22, 2026

@JerrettDavis JerrettDavis left a comment

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The registry fallback direction is good, but it still misses an important Gemini model-id shape that already appears in the codebase/docs: gemini/gemini-... (LiteLLM-style provider prefix). _infer_provider() recognizes gemini- and google/gemini-, and _unprefixed_model_id() strips google/, but neither handles gemini/. With pricing unavailable, ModelRegistry.resolve('gemini/gemini-2.0-flash', provider='google') returns None, so the Google provider can still reject a Gemini-family model. Please support the gemini/ prefix in both inference/unprefixing and add regression coverage for gemini/gemini-2.0-flash or a future gemini/gemini-3-* id.

@julienguarino julienguarino changed the title Fix Gemini model capability resolution Resolve Google model capabilities through ModelRegistry Jun 25, 2026
@github-actions github-actions Bot added status: ready for review Pull request body is complete and the author marked it ready for human review status: has conflicts Pull request has merge conflicts with the base branch and removed status: needs author action Pull request body or readiness checklist still needs author updates status: ready for review Pull request body is complete and the author marked it ready for human review labels Jun 25, 2026
@julienguarino julienguarino force-pushed the fix/google-model-capability-resolution branch from ace2733 to a99cba6 Compare June 25, 2026 12:58
@github-actions github-actions Bot added status: ready for review Pull request body is complete and the author marked it ready for human review and removed status: has conflicts Pull request has merge conflicts with the base branch labels Jun 25, 2026
@julienguarino julienguarino force-pushed the fix/google-model-capability-resolution branch from a99cba6 to 97e23b9 Compare June 25, 2026 14:11
@github-actions github-actions Bot added status: ci failing Required or reported CI checks are failing and removed status: ready for review Pull request body is complete and the author marked it ready for human review labels Jun 25, 2026
@julienguarino

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Addressed the review by supporting the LiteLLM-style gemini/gemini-... prefix in both provider inference and unprefixing. Added regression coverage at the registry layer and through GoogleProvider with pricing metadata mocked unavailable. Targeted checks now pass: 65 passed, ruff check, and ruff format check.

@github-actions github-actions Bot added status: ready for review Pull request body is complete and the author marked it ready for human review and removed status: ci failing Required or reported CI checks are failing labels Jun 25, 2026
@julienguarino

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Follow-up verification for the exact model shape from the review: with pricing metadata mocked unavailable, ModelRegistry.resolve('gemini/gemini-2.0-flash', provider='google') now returns a Google ModelInfo with a 1M context window, and GoogleProvider.supports_model('gemini/gemini-2.0-flash') returns True. The latest commit also has regression coverage for the gemini/gemini-... prefix at both the registry and provider layers.

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@JerrettDavis The requested gemini/gemini-... support is now in the latest commit, including registry/provider regression coverage and a smoke check against gemini/gemini-2.0-flash. Could you re-review when you have a moment?

@github-actions github-actions Bot added status: ci failing Required or reported CI checks are failing and removed status: ready for review Pull request body is complete and the author marked it ready for human review labels Jun 25, 2026
@julienguarino julienguarino force-pushed the fix/google-model-capability-resolution branch from 97e23b9 to d3d0a43 Compare June 25, 2026 16:20
@github-actions github-actions Bot added the status: ready for review Pull request body is complete and the author marked it ready for human review label Jun 25, 2026
@github-actions github-actions Bot removed the status: ci failing Required or reported CI checks are failing label Jun 25, 2026

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Re-reviewed the latest head. The shared ModelRegistry.resolve path keeps exact catalog matches first, supports Google/Gemini family fallbacks for future IDs, handles gemini/gemini-* prefixes, and still refuses unrelated models under the Google provider. The regression tests cover those cases, so the code review approval stands.

@JerrettDavis JerrettDavis changed the title Resolve Google model capabilities through ModelRegistry fix(gemini): resolve Google model capabilities through ModelRegistry Jun 27, 2026
@JerrettDavis JerrettDavis merged commit 17ecad9 into headroomlabs-ai:main Jun 27, 2026
25 checks passed
@github-actions github-actions Bot mentioned this pull request Jun 27, 2026
chopratejas pushed a commit that referenced this pull request Jun 29, 2026
🤖 I have created a release *beep* *boop*
---


<details><summary>0.28.0</summary>

##
[0.28.0](v0.27.0...v0.28.0)
(2026-06-29)


### Features

* add --disable-kompress-fallback to restore legacy PASSTHROUGH fallback
([#1185](#1185))
([f309244](f309244))
* add first-class OpenCode support (wrap, learn, mcp install)
([#559](#559))
([91cd210](91cd210))
* add HEADROOM_KEEPALIVE_EXPIRY to keep upstream connections warm
([#1124](#1124))
([85786b3](85786b3))
* **azure-foundry:** derive upstream URL from ANTHROPIC_FOUNDRY_RESOURCE
([#1138](#1138))
([e5031b0](e5031b0))
* **cache:** attribute prompt-cache misses to TTL lapse vs prefix change
([#1313](#1313))
([#1343](#1343))
([4658721](4658721))
* **code:** add Perl support to code-aware compressor
([#1125](#1125))
([f39858c](f39858c))
* headroom wrap opencode / unwrap opencode CLI
([#1105](#1105))
([b4571cc](b4571cc))
* **learn:** weight loops in Headroom Learn + RTK-loop eval
([#1160](#1160))
([14e8dc4](14e8dc4))
* **learn:** write per-project learnings to CLAUDE.local.md by default
([#1115](#1115))
([ced75e4](ced75e4))
* **proxy:** add request timeout config
([#738](#738))
([c0745d4](c0745d4))
* **proxy:** pilot hardening — inbound auth, security headers, audit
log, air-gap switch
([#1537](#1537))
([546ab55](546ab55))
* **proxy:** support glob patterns in exclude_tools
([#870](#870))
([#1259](#1259))
([a2159c0](a2159c0))
* **read-maturation:** activity-based hold-back Read maturation
(Mechanism B)
([#1068](#1068))
([723b80c](723b80c))
* **savings:** durable savings ledger + headroom savings command
([#1127](#1127))
([978ffa0](978ffa0))
* **wrap:** add --1m to preserve the 1M context window on wrap claude
([#1158](#1158))
([#1351](#1351))
([b50d9c1](b50d9c1))
* **wrap:** make tokensave the primary coding-task compressor, Serena
the backup
([#1230](#1230))
([dca9853](dca9853))


### Bug Fixes

* **agent-evals:** Phase 0 — coding-agent accuracy A/B framework
([#1037](#1037))
([84f9871](84f9871))
* **agno:** tolerate streaming tool-call SDK objects in parser
([#1312](#1312))
([#1336](#1336))
([5986c22](5986c22))
* **bedrock:** add boto3 1.41 + CRT for aws login credentials
([#1486](#1486))
([4db3bc9](4db3bc9))
* bump codebase-memory-mcp to v0.8.1
([#1284](#1284))
([530318b](530318b))
* **ccr:** make headroom_retrieve a hash-only full-content lookup
([#1532](#1532))
([c2fc4d3](c2fc4d3))
* **ccr:** propagate --no-ccr-marker flag to all compressors
([#1022](#1022))
([#1197](#1197))
([0c9b42a](0c9b42a))
* **ccr:** skip Anthropic marker emission when tool injection is
deferred
([#1273](#1273))
([2cae13d](2cae13d))
* **ci:** extend gitleaks allowlist to cover test fixtures + verified
examples
([#1539](#1539))
([d2565a6](d2565a6))
* **ci:** guarantee model present in test shards to end cache-miss
flakiness
([#1399](#1399))
([2e29c72](2e29c72))
* **ci:** normalize Windows CRLF line endings in PR governance script
([#1012](#1012))
([5194388](5194388))
* **cli:** add explicit UTF-8 encoding to file I/O in wrap commands
([#1126](#1126))
([#1164](#1164))
([a0cb798](a0cb798))
* **cli:** fall back gracefully when embedding-server sidecar is absent
([#1206](#1206))
([38f1404](38f1404))
* **cli:** harden all CLI surfaces + fix docs accuracy
([#1491](#1491))
([bd76235](bd76235))
* **cli:** wire --http2/--no-http2 (HEADROOM_HTTP2) into proxy command
([#1373](#1373))
([e06b616](e06b616))
* **cli:** wire --rpm/--tpm and HEADROOM_RPM/HEADROOM_TPM to the Click
proxy command
([#1375](#1375))
([8aab8f2](8aab8f2))
* **code:** slice tree-sitter byte offsets as UTF-8
([#1332](#1332))
([8238402](8238402))
* **code:** validate Python compressed syntax
([#1302](#1302))
([cbd361d](cbd361d))
* **code:** verify a real parse in tree-sitter availability check
([#1231](#1231))
([#1299](#1299))
([5e0bb69](5e0bb69))
* **codex:** retag threads on init so Codex Desktop history stays
visible ([#961](#961))
([#1349](#1349))
([e6bbc40](e6bbc40))
* **codex:** stop pinning Codex memory MCP to one project db
([#1269](#1269))
([ad7993b](ad7993b))
* **dashboard:** include RTK stats in the historical tab
([#1324](#1324))
([35939c3](35939c3))
* **deps:** remediate dependency CVEs and publish SBOM
([#1509](#1509))
([5771a80](5771a80))
* **docker:** persist session history across container revisions
([#1118](#1118))
([5912d65](5912d65))
* **gemini:** offload compression to the executor
([#1382](#1382))
([615848e](615848e))
* **gemini:** resolve Google model capabilities through ModelRegistry
([#1276](#1276))
([17ecad9](17ecad9))
* **install:** guard install_agent_ensure against duplicate runtime
spawns
([#1301](#1301))
([8da0b4e](8da0b4e))
* **install:** repair macOS launchd restart/start lifecycle
([#1290](#1290))
([da1a397](da1a397))
* **install:** stop duplicating ENTRYPOINT in persistent-docker runtime
command ([#833](#833))
([#1348](#1348))
([feedead](feedead))
* **io:** use UTF-8 with locale fallback and preserve line endings on
config/text I/O
([#1498](#1498))
([1baa04e](1baa04e))
* **kompress:** hard override keeps must-keep tokens regardless of model
score ([#1400](#1400))
([42612c8](42612c8))
* **langchain:** disable streaming on wrapped model during ainvoke()
([#1287](#1287))
([3590046](3590046))
* **mcp:** register managed installs with a resolvable headroom command
([#1386](#1386))
([22def93](22def93))
* **mcp:** report correct savings_percent in headroom_compress
([#1106](#1106))
([f216e43](f216e43))
* **opencode:** write local MCP config
([#1381](#1381))
([6c83790](6c83790))
* **packaging:** move hnswlib to optional [vector] extra so [all] needs
no C++ toolchain
([#1499](#1499))
([80fa086](80fa086))
* patch rtk hook script to use absolute path after register_claude_hooks
([#571](#571))
([b618d2d](b618d2d))
* **perf:** surface RTK/CLI context-tool savings in perf and the session
card ([#1433](#1433))
([9362747](9362747))
* **proxy:** add --protect-tool-results to prevent lossy compression of
exact-output Bash results
([#1374](#1374))
([51d4bcf](51d4bcf))
* **proxy:** add an Anthropic buffered read-timeout override
([#1331](#1331))
([3be2526](3be2526))
* **proxy:** add versionless Vertex AI routes for Claude Code
compatibility
([#1321](#1321))
([bb3e040](bb3e040))
* **proxy:** bind before eager preload so a hung compressor load can't
block startup
([#1500](#1500))
([d5ac07f](d5ac07f))
* **proxy:** build SSL contexts for custom CA bundles
([#1134](#1134))
([561ba17](561ba17))
* **proxy:** forward request-id headers on the streaming path
([#1100](#1100))
([#1258](#1258))
([3d59df7](3d59df7))
* **proxy:** gate CCR retrieve/compress endpoints to loopback
([#1338](#1338))
([acafb2d](acafb2d))
* **proxy:** honor force_kompress routing profile
([#996](#996))
([b4682d6](b4682d6))
* **proxy:** keep large compression results on the critical path
([#296](#296))
([#1352](#1352))
([90734b6](90734b6))
* **proxy:** offload /v1/compress to the compression executor to stop
blocking the loop
([#1501](#1501))
([27e010e](27e010e))
* **proxy:** preserve Responses memory continuations with store=false
([#1103](#1103))
([cdfeeac](cdfeeac))
* **proxy:** queue mid-turn user messages on non-Bedrock streaming path
([#1377](#1377))
([b09f027](b09f027))
* **proxy:** register interceptor in explicit transforms list when
HEADROOM_INTERCEPT_ENABLED
([#1376](#1376))
([55c700c](55c700c))
* **proxy:** report real input tokens on streaming message_start
([#1132](#1132))
([#1305](#1305))
([70cc96a](70cc96a))
* **proxy:** retry upstream 429 with Retry-After on both forwarders
([#1329](#1329))
([90bee89](90bee89))
* **proxy:** retry upstream 529 overloaded like 429 on both forwarders
([#1495](#1495))
([547b15d](547b15d))
* **proxy:** stop re-compressing headroom_retrieve output and emitting
unredeemable markers
([#1323](#1323))
([43494ff](43494ff))
* **proxy:** strip Codex lite header from OpenAI WebSockets
([#1543](#1543))
([5d3803a](5d3803a))
* **read-lifecycle:** persist STALE Read originals in the CCR store
([#1488](#1488))
([9157173](9157173))
* recover persistent proxy feature checks and reject non-Copilot
exchange URL
([#1465](#1465))
([16c638b](16c638b))
* remove agents.md
([#1540](#1540))
([a7d3360](a7d3360))
* respect COPILOT_PROVIDER_TYPE env var when provider_type is auto
([#549](#549))
([24cf256](24cf256))
* restore token-mode compression on frozen prefixes
([#1489](#1489))
([8e0dadf](8e0dadf))
* **router:** degrade to pure-Python detection on native panic
([#1123](#1123))
([#1260](#1260))
([a00fb67](a00fb67))
* **rtk:** stop hook registration timing out on a forked daemon
([#1314](#1314))
([9758817](9758817))
* **smart-crusher:** honor enable_ccr_marker on the opaque-blob path
([#1130](#1130))
([27d6f8e](27d6f8e))
* **subscription:** only reset 5h contribution on real rollover, not API
jitter
([#1255](#1255))
([8d6c175](8d6c175))
* **subscription:** run transcript token scan off the event loop
([#1263](#1263))
([f03021f](f03021f))
* surface output reduction without a restart, and explain $0.00 savings
on Python 3.14
([#1296](#1296))
([c30ec4c](c30ec4c))
* **tests:** reset whole headroom logger subtree so caplog stays
deterministic
([#1117](#1117))
([fda4670](fda4670))
* **tls:** add HEADROOM_TLS_STRICT=0 toggle for corporate SSL inspection
([#1308](#1308))
([#1341](#1341))
([52068dd](52068dd))
* **tokenizers:** price CJK/Kana/Hangul at ~1 token per char in
EstimatingTokenCounter
([#1093](#1093))
([a35fe86](a35fe86))
* **transforms:** gate tool string output from lossy compression
([#1307](#1307))
([#1387](#1387))
([c6c921a](c6c921a))
* **websocket:** harden responses websocket origin handling
([#1481](#1481))
([c632023](c632023))
* **windows:** pin UTF-8 encoding on text-mode subprocess calls
([#1311](#1311))
([d633e81](d633e81))
* **wrap:** add Copilot unwrap command
([#1251](#1251))
([b4fde0c](b4fde0c))
* **wrap:** isolate proxy stdio from proxy.log on Windows
([#1191](#1191))
([959ab0d](959ab0d))
* **wrap:** keep agent savings opt-in
([#1294](#1294))
([b829ceb](b829ceb))
* **wrap:** show the dashboard URL when the proxy is already running
([#1313](#1313))
([b0146c4](b0146c4))


### Performance Improvements

* **compression:** take large cold-start contexts off the synchronous
kompress path
([#1171](#1171))
([#1298](#1298))
([6c68ff4](6c68ff4))
</details>

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
JerrettDavis pushed a commit to peterlodri-sec/headroom that referenced this pull request Jul 14, 2026
…eadroomlabs-ai#1276)

## Description

Google model capability lookup was still tied to static provider tables
for support checks and context limits. That made plausible future Gemini
model ids fail token counting or context lookup even when they clearly
belonged to the Google provider family.

This change adds a tolerant `ModelRegistry.resolve()` runtime lookup
path and routes the Google provider through it. Exact built-in registry
matches still win first, LiteLLM pricing metadata can supply live limits
when available, and provider-scoped family fallbacks cover future Gemini
ids without letting Google claim unrelated models.

## Type of Change

- [x] Bug fix (non-breaking change that fixes an issue)
- [ ] New feature (non-breaking change that adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
- [ ] Performance improvement
- [ ] Code refactoring (no functional changes)

## Changes Made

- Added `ModelRegistry.resolve()` as a tolerant runtime capability
resolver.
- Added provider-scoped Google/Gemini family fallbacks for plausible
future model ids.
- Added support for LiteLLM-style `gemini/gemini-...` model ids in
provider inference and family fallback matching.
- Updated `GoogleProvider.supports_model()` and
`GoogleProvider.get_context_limit()` to use the shared model registry
path.
- Added regression tests for future Gemini ids, legacy Gemini context
limits, and unrelated model rejection.

## Testing

- [x] Unit tests pass (`pytest`)
- [x] Linting passes (`ruff check .`)
- [ ] Type checking passes (`mypy headroom`)
- [x] New tests added for new functionality
- [x] Manual testing performed

### Test Output

```text
uv run --no-project --with pytest --with opentelemetry-api --with pydantic --with tiktoken --with litellm --with click --with rich python -B -m pytest tests/test_provider_model_fallback.py tests/test_models.py

65 passed

uv run --no-project --with ruff ruff check headroom/models/registry.py headroom/providers/google.py tests/test_provider_model_fallback.py tests/test_models.py

All checks passed!

uv run --no-project --with ruff ruff format --check headroom/models/registry.py headroom/providers/google.py tests/test_provider_model_fallback.py tests/test_models.py

4 files already formatted
```

## Real Behavior Proof

- Environment: macOS arm64 local checkout, Python 3.13 virtualenv for
editable install; deployed smoke test in a Cloud Run staging service
using an earlier commit from this fork branch before the review
follow-up.
- Exact command / steps: installed `headroom-ai[langchain]` from the
fork branch in the staging service, triggered long-context requests that
activate Headroom's LangChain compression path, then checked Cloud Run
logs after 2026-06-22 12:20 Europe/Paris.
- Observed result: Headroom initialized successfully, compressed
conversation memory (`23255 -> 5618 chars`), and no logs matched the
previous model-resolution failure signatures (`not recognized as a
Google model`, `Unknown context limit`).
- Not tested: staging was not rerun after the `gemini/gemini-...` review
follow-up; that prefix path is covered by local regression tests. Full
repository `uv run pytest` on local macOS is currently blocked by a
native `maturin`/`esaxx-rs` compile failure (`fatal error: 'cstdint'
file not found`). Type checking was not run.

## Review Readiness

- [x] I have performed a self-review
- [x] This PR is ready for human review

## Checklist

- [x] My code follows the project's style guidelines
- [x] I have performed a self-review of my code
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [x] I have updated the CHANGELOG.md if applicable

## Screenshots (if applicable)

N/A

## Additional Notes

- Documentation changes are not included because this is a runtime
compatibility fix with no public API or user-facing configuration
change.
- Full local test execution should be retried in CI or a Linux
environment where the native Rust extension build is healthy.

Co-authored-by: Julien Guarino <julien.guarino@fashiondata.io>
JerrettDavis pushed a commit to peterlodri-sec/headroom that referenced this pull request Jul 14, 2026
🤖 I have created a release *beep* *boop*
---


<details><summary>0.28.0</summary>

##
[0.28.0](headroomlabs-ai/headroom@v0.27.0...v0.28.0)
(2026-06-29)


### Features

* add --disable-kompress-fallback to restore legacy PASSTHROUGH fallback
([headroomlabs-ai#1185](headroomlabs-ai#1185))
([f309244](headroomlabs-ai@f309244))
* add first-class OpenCode support (wrap, learn, mcp install)
([headroomlabs-ai#559](headroomlabs-ai#559))
([91cd210](headroomlabs-ai@91cd210))
* add HEADROOM_KEEPALIVE_EXPIRY to keep upstream connections warm
([headroomlabs-ai#1124](headroomlabs-ai#1124))
([85786b3](headroomlabs-ai@85786b3))
* **azure-foundry:** derive upstream URL from ANTHROPIC_FOUNDRY_RESOURCE
([headroomlabs-ai#1138](headroomlabs-ai#1138))
([e5031b0](headroomlabs-ai@e5031b0))
* **cache:** attribute prompt-cache misses to TTL lapse vs prefix change
([headroomlabs-ai#1313](headroomlabs-ai#1313))
([headroomlabs-ai#1343](headroomlabs-ai#1343))
([4658721](headroomlabs-ai@4658721))
* **code:** add Perl support to code-aware compressor
([headroomlabs-ai#1125](headroomlabs-ai#1125))
([f39858c](headroomlabs-ai@f39858c))
* headroom wrap opencode / unwrap opencode CLI
([headroomlabs-ai#1105](headroomlabs-ai#1105))
([b4571cc](headroomlabs-ai@b4571cc))
* **learn:** weight loops in Headroom Learn + RTK-loop eval
([headroomlabs-ai#1160](headroomlabs-ai#1160))
([14e8dc4](headroomlabs-ai@14e8dc4))
* **learn:** write per-project learnings to CLAUDE.local.md by default
([headroomlabs-ai#1115](headroomlabs-ai#1115))
([ced75e4](headroomlabs-ai@ced75e4))
* **proxy:** add request timeout config
([headroomlabs-ai#738](headroomlabs-ai#738))
([c0745d4](headroomlabs-ai@c0745d4))
* **proxy:** pilot hardening — inbound auth, security headers, audit
log, air-gap switch
([headroomlabs-ai#1537](headroomlabs-ai#1537))
([546ab55](headroomlabs-ai@546ab55))
* **proxy:** support glob patterns in exclude_tools
([headroomlabs-ai#870](headroomlabs-ai#870))
([headroomlabs-ai#1259](headroomlabs-ai#1259))
([a2159c0](headroomlabs-ai@a2159c0))
* **read-maturation:** activity-based hold-back Read maturation
(Mechanism B)
([headroomlabs-ai#1068](headroomlabs-ai#1068))
([723b80c](headroomlabs-ai@723b80c))
* **savings:** durable savings ledger + headroom savings command
([headroomlabs-ai#1127](headroomlabs-ai#1127))
([978ffa0](headroomlabs-ai@978ffa0))
* **wrap:** add --1m to preserve the 1M context window on wrap claude
([headroomlabs-ai#1158](headroomlabs-ai#1158))
([headroomlabs-ai#1351](headroomlabs-ai#1351))
([b50d9c1](headroomlabs-ai@b50d9c1))
* **wrap:** make tokensave the primary coding-task compressor, Serena
the backup
([headroomlabs-ai#1230](headroomlabs-ai#1230))
([dca9853](headroomlabs-ai@dca9853))


### Bug Fixes

* **agent-evals:** Phase 0 — coding-agent accuracy A/B framework
([headroomlabs-ai#1037](headroomlabs-ai#1037))
([84f9871](headroomlabs-ai@84f9871))
* **agno:** tolerate streaming tool-call SDK objects in parser
([headroomlabs-ai#1312](headroomlabs-ai#1312))
([headroomlabs-ai#1336](headroomlabs-ai#1336))
([5986c22](headroomlabs-ai@5986c22))
* **bedrock:** add boto3 1.41 + CRT for aws login credentials
([headroomlabs-ai#1486](headroomlabs-ai#1486))
([4db3bc9](headroomlabs-ai@4db3bc9))
* bump codebase-memory-mcp to v0.8.1
([headroomlabs-ai#1284](headroomlabs-ai#1284))
([530318b](headroomlabs-ai@530318b))
* **ccr:** make headroom_retrieve a hash-only full-content lookup
([headroomlabs-ai#1532](headroomlabs-ai#1532))
([c2fc4d3](headroomlabs-ai@c2fc4d3))
* **ccr:** propagate --no-ccr-marker flag to all compressors
([headroomlabs-ai#1022](headroomlabs-ai#1022))
([headroomlabs-ai#1197](headroomlabs-ai#1197))
([0c9b42a](headroomlabs-ai@0c9b42a))
* **ccr:** skip Anthropic marker emission when tool injection is
deferred
([headroomlabs-ai#1273](headroomlabs-ai#1273))
([2cae13d](headroomlabs-ai@2cae13d))
* **ci:** extend gitleaks allowlist to cover test fixtures + verified
examples
([headroomlabs-ai#1539](headroomlabs-ai#1539))
([d2565a6](headroomlabs-ai@d2565a6))
* **ci:** guarantee model present in test shards to end cache-miss
flakiness
([headroomlabs-ai#1399](headroomlabs-ai#1399))
([2e29c72](headroomlabs-ai@2e29c72))
* **ci:** normalize Windows CRLF line endings in PR governance script
([headroomlabs-ai#1012](headroomlabs-ai#1012))
([5194388](headroomlabs-ai@5194388))
* **cli:** add explicit UTF-8 encoding to file I/O in wrap commands
([headroomlabs-ai#1126](headroomlabs-ai#1126))
([headroomlabs-ai#1164](headroomlabs-ai#1164))
([a0cb798](headroomlabs-ai@a0cb798))
* **cli:** fall back gracefully when embedding-server sidecar is absent
([headroomlabs-ai#1206](headroomlabs-ai#1206))
([38f1404](headroomlabs-ai@38f1404))
* **cli:** harden all CLI surfaces + fix docs accuracy
([headroomlabs-ai#1491](headroomlabs-ai#1491))
([bd76235](headroomlabs-ai@bd76235))
* **cli:** wire --http2/--no-http2 (HEADROOM_HTTP2) into proxy command
([headroomlabs-ai#1373](headroomlabs-ai#1373))
([e06b616](headroomlabs-ai@e06b616))
* **cli:** wire --rpm/--tpm and HEADROOM_RPM/HEADROOM_TPM to the Click
proxy command
([headroomlabs-ai#1375](headroomlabs-ai#1375))
([8aab8f2](headroomlabs-ai@8aab8f2))
* **code:** slice tree-sitter byte offsets as UTF-8
([headroomlabs-ai#1332](headroomlabs-ai#1332))
([8238402](headroomlabs-ai@8238402))
* **code:** validate Python compressed syntax
([headroomlabs-ai#1302](headroomlabs-ai#1302))
([cbd361d](headroomlabs-ai@cbd361d))
* **code:** verify a real parse in tree-sitter availability check
([headroomlabs-ai#1231](headroomlabs-ai#1231))
([headroomlabs-ai#1299](headroomlabs-ai#1299))
([5e0bb69](headroomlabs-ai@5e0bb69))
* **codex:** retag threads on init so Codex Desktop history stays
visible ([headroomlabs-ai#961](headroomlabs-ai#961))
([headroomlabs-ai#1349](headroomlabs-ai#1349))
([e6bbc40](headroomlabs-ai@e6bbc40))
* **codex:** stop pinning Codex memory MCP to one project db
([headroomlabs-ai#1269](headroomlabs-ai#1269))
([ad7993b](headroomlabs-ai@ad7993b))
* **dashboard:** include RTK stats in the historical tab
([headroomlabs-ai#1324](headroomlabs-ai#1324))
([35939c3](headroomlabs-ai@35939c3))
* **deps:** remediate dependency CVEs and publish SBOM
([headroomlabs-ai#1509](headroomlabs-ai#1509))
([5771a80](headroomlabs-ai@5771a80))
* **docker:** persist session history across container revisions
([headroomlabs-ai#1118](headroomlabs-ai#1118))
([5912d65](headroomlabs-ai@5912d65))
* **gemini:** offload compression to the executor
([headroomlabs-ai#1382](headroomlabs-ai#1382))
([615848e](headroomlabs-ai@615848e))
* **gemini:** resolve Google model capabilities through ModelRegistry
([headroomlabs-ai#1276](headroomlabs-ai#1276))
([17ecad9](headroomlabs-ai@17ecad9))
* **install:** guard install_agent_ensure against duplicate runtime
spawns
([headroomlabs-ai#1301](headroomlabs-ai#1301))
([8da0b4e](headroomlabs-ai@8da0b4e))
* **install:** repair macOS launchd restart/start lifecycle
([headroomlabs-ai#1290](headroomlabs-ai#1290))
([da1a397](headroomlabs-ai@da1a397))
* **install:** stop duplicating ENTRYPOINT in persistent-docker runtime
command ([headroomlabs-ai#833](headroomlabs-ai#833))
([headroomlabs-ai#1348](headroomlabs-ai#1348))
([feedead](headroomlabs-ai@feedead))
* **io:** use UTF-8 with locale fallback and preserve line endings on
config/text I/O
([headroomlabs-ai#1498](headroomlabs-ai#1498))
([1baa04e](headroomlabs-ai@1baa04e))
* **kompress:** hard override keeps must-keep tokens regardless of model
score ([headroomlabs-ai#1400](headroomlabs-ai#1400))
([42612c8](headroomlabs-ai@42612c8))
* **langchain:** disable streaming on wrapped model during ainvoke()
([headroomlabs-ai#1287](headroomlabs-ai#1287))
([3590046](headroomlabs-ai@3590046))
* **mcp:** register managed installs with a resolvable headroom command
([headroomlabs-ai#1386](headroomlabs-ai#1386))
([22def93](headroomlabs-ai@22def93))
* **mcp:** report correct savings_percent in headroom_compress
([headroomlabs-ai#1106](headroomlabs-ai#1106))
([f216e43](headroomlabs-ai@f216e43))
* **opencode:** write local MCP config
([headroomlabs-ai#1381](headroomlabs-ai#1381))
([6c83790](headroomlabs-ai@6c83790))
* **packaging:** move hnswlib to optional [vector] extra so [all] needs
no C++ toolchain
([headroomlabs-ai#1499](headroomlabs-ai#1499))
([80fa086](headroomlabs-ai@80fa086))
* patch rtk hook script to use absolute path after register_claude_hooks
([headroomlabs-ai#571](headroomlabs-ai#571))
([b618d2d](headroomlabs-ai@b618d2d))
* **perf:** surface RTK/CLI context-tool savings in perf and the session
card ([headroomlabs-ai#1433](headroomlabs-ai#1433))
([9362747](headroomlabs-ai@9362747))
* **proxy:** add --protect-tool-results to prevent lossy compression of
exact-output Bash results
([headroomlabs-ai#1374](headroomlabs-ai#1374))
([51d4bcf](headroomlabs-ai@51d4bcf))
* **proxy:** add an Anthropic buffered read-timeout override
([headroomlabs-ai#1331](headroomlabs-ai#1331))
([3be2526](headroomlabs-ai@3be2526))
* **proxy:** add versionless Vertex AI routes for Claude Code
compatibility
([headroomlabs-ai#1321](headroomlabs-ai#1321))
([bb3e040](headroomlabs-ai@bb3e040))
* **proxy:** bind before eager preload so a hung compressor load can't
block startup
([headroomlabs-ai#1500](headroomlabs-ai#1500))
([d5ac07f](headroomlabs-ai@d5ac07f))
* **proxy:** build SSL contexts for custom CA bundles
([headroomlabs-ai#1134](headroomlabs-ai#1134))
([561ba17](headroomlabs-ai@561ba17))
* **proxy:** forward request-id headers on the streaming path
([headroomlabs-ai#1100](headroomlabs-ai#1100))
([headroomlabs-ai#1258](headroomlabs-ai#1258))
([3d59df7](headroomlabs-ai@3d59df7))
* **proxy:** gate CCR retrieve/compress endpoints to loopback
([headroomlabs-ai#1338](headroomlabs-ai#1338))
([acafb2d](headroomlabs-ai@acafb2d))
* **proxy:** honor force_kompress routing profile
([headroomlabs-ai#996](headroomlabs-ai#996))
([b4682d6](headroomlabs-ai@b4682d6))
* **proxy:** keep large compression results on the critical path
([headroomlabs-ai#296](headroomlabs-ai#296))
([headroomlabs-ai#1352](headroomlabs-ai#1352))
([90734b6](headroomlabs-ai@90734b6))
* **proxy:** offload /v1/compress to the compression executor to stop
blocking the loop
([headroomlabs-ai#1501](headroomlabs-ai#1501))
([27e010e](headroomlabs-ai@27e010e))
* **proxy:** preserve Responses memory continuations with store=false
([headroomlabs-ai#1103](headroomlabs-ai#1103))
([cdfeeac](headroomlabs-ai@cdfeeac))
* **proxy:** queue mid-turn user messages on non-Bedrock streaming path
([headroomlabs-ai#1377](headroomlabs-ai#1377))
([b09f027](headroomlabs-ai@b09f027))
* **proxy:** register interceptor in explicit transforms list when
HEADROOM_INTERCEPT_ENABLED
([headroomlabs-ai#1376](headroomlabs-ai#1376))
([55c700c](headroomlabs-ai@55c700c))
* **proxy:** report real input tokens on streaming message_start
([headroomlabs-ai#1132](headroomlabs-ai#1132))
([headroomlabs-ai#1305](headroomlabs-ai#1305))
([70cc96a](headroomlabs-ai@70cc96a))
* **proxy:** retry upstream 429 with Retry-After on both forwarders
([headroomlabs-ai#1329](headroomlabs-ai#1329))
([90bee89](headroomlabs-ai@90bee89))
* **proxy:** retry upstream 529 overloaded like 429 on both forwarders
([headroomlabs-ai#1495](headroomlabs-ai#1495))
([547b15d](headroomlabs-ai@547b15d))
* **proxy:** stop re-compressing headroom_retrieve output and emitting
unredeemable markers
([headroomlabs-ai#1323](headroomlabs-ai#1323))
([43494ff](headroomlabs-ai@43494ff))
* **proxy:** strip Codex lite header from OpenAI WebSockets
([headroomlabs-ai#1543](headroomlabs-ai#1543))
([5d3803a](headroomlabs-ai@5d3803a))
* **read-lifecycle:** persist STALE Read originals in the CCR store
([headroomlabs-ai#1488](headroomlabs-ai#1488))
([9157173](headroomlabs-ai@9157173))
* recover persistent proxy feature checks and reject non-Copilot
exchange URL
([headroomlabs-ai#1465](headroomlabs-ai#1465))
([16c638b](headroomlabs-ai@16c638b))
* remove agents.md
([headroomlabs-ai#1540](headroomlabs-ai#1540))
([a7d3360](headroomlabs-ai@a7d3360))
* respect COPILOT_PROVIDER_TYPE env var when provider_type is auto
([headroomlabs-ai#549](headroomlabs-ai#549))
([24cf256](headroomlabs-ai@24cf256))
* restore token-mode compression on frozen prefixes
([headroomlabs-ai#1489](headroomlabs-ai#1489))
([8e0dadf](headroomlabs-ai@8e0dadf))
* **router:** degrade to pure-Python detection on native panic
([headroomlabs-ai#1123](headroomlabs-ai#1123))
([headroomlabs-ai#1260](headroomlabs-ai#1260))
([a00fb67](headroomlabs-ai@a00fb67))
* **rtk:** stop hook registration timing out on a forked daemon
([headroomlabs-ai#1314](headroomlabs-ai#1314))
([9758817](headroomlabs-ai@9758817))
* **smart-crusher:** honor enable_ccr_marker on the opaque-blob path
([headroomlabs-ai#1130](headroomlabs-ai#1130))
([27d6f8e](headroomlabs-ai@27d6f8e))
* **subscription:** only reset 5h contribution on real rollover, not API
jitter
([headroomlabs-ai#1255](headroomlabs-ai#1255))
([8d6c175](headroomlabs-ai@8d6c175))
* **subscription:** run transcript token scan off the event loop
([headroomlabs-ai#1263](headroomlabs-ai#1263))
([f03021f](headroomlabs-ai@f03021f))
* surface output reduction without a restart, and explain $0.00 savings
on Python 3.14
([headroomlabs-ai#1296](headroomlabs-ai#1296))
([c30ec4c](headroomlabs-ai@c30ec4c))
* **tests:** reset whole headroom logger subtree so caplog stays
deterministic
([headroomlabs-ai#1117](headroomlabs-ai#1117))
([fda4670](headroomlabs-ai@fda4670))
* **tls:** add HEADROOM_TLS_STRICT=0 toggle for corporate SSL inspection
([headroomlabs-ai#1308](headroomlabs-ai#1308))
([headroomlabs-ai#1341](headroomlabs-ai#1341))
([52068dd](headroomlabs-ai@52068dd))
* **tokenizers:** price CJK/Kana/Hangul at ~1 token per char in
EstimatingTokenCounter
([headroomlabs-ai#1093](headroomlabs-ai#1093))
([a35fe86](headroomlabs-ai@a35fe86))
* **transforms:** gate tool string output from lossy compression
([headroomlabs-ai#1307](headroomlabs-ai#1307))
([headroomlabs-ai#1387](headroomlabs-ai#1387))
([c6c921a](headroomlabs-ai@c6c921a))
* **websocket:** harden responses websocket origin handling
([headroomlabs-ai#1481](headroomlabs-ai#1481))
([c632023](headroomlabs-ai@c632023))
* **windows:** pin UTF-8 encoding on text-mode subprocess calls
([headroomlabs-ai#1311](headroomlabs-ai#1311))
([d633e81](headroomlabs-ai@d633e81))
* **wrap:** add Copilot unwrap command
([headroomlabs-ai#1251](headroomlabs-ai#1251))
([b4fde0c](headroomlabs-ai@b4fde0c))
* **wrap:** isolate proxy stdio from proxy.log on Windows
([headroomlabs-ai#1191](headroomlabs-ai#1191))
([959ab0d](headroomlabs-ai@959ab0d))
* **wrap:** keep agent savings opt-in
([headroomlabs-ai#1294](headroomlabs-ai#1294))
([b829ceb](headroomlabs-ai@b829ceb))
* **wrap:** show the dashboard URL when the proxy is already running
([headroomlabs-ai#1313](headroomlabs-ai#1313))
([b0146c4](headroomlabs-ai@b0146c4))


### Performance Improvements

* **compression:** take large cold-start contexts off the synchronous
kompress path
([headroomlabs-ai#1171](headroomlabs-ai#1171))
([headroomlabs-ai#1298](headroomlabs-ai#1298))
([6c68ff4](headroomlabs-ai@6c68ff4))
</details>

---
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Please](https://github.com/googleapis/release-please). See
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