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Author SHA1 Message Date
Zhenjia ZHOU
fda4670ef8
fix(tests): reset whole headroom logger subtree so caplog stays deterministic (#1117) 
## Description

Five `caplog`-based test assertions are order-dependent flakes: they
pass in isolation but fail in full-suite runs.

**Root cause** is a global logging-state leak.
`benchmarks.claude_session_mode_benchmark._disable_headroom_benchmark_logging()`
(exercised by `tests/test_claude_session_mode_benchmark.py`) sets
`propagate = False` + `CRITICAL` on the `headroom`, `headroom.proxy`,
`headroom.transforms` (and `headroom.cache`) loggers and never restores
them. pytest's `caplog` attaches its handler to the **root** logger, so
once any `headroom.*` child is left non-propagating, records from that
subtree silently never reach `caplog` for **every test that runs
afterwards** — which is exactly why these only fail in full-suite order.

The repo already ships a `_reset_headroom_logger_propagation` autouse
fixture for this hazard (its docstring documents the equivalent
`_setup_file_logging` leak), but it only reset the **top** `headroom`
logger, not children like `headroom.proxy`. A non-propagating child
still blocks the record before it reaches root. This PR extends the
existing fixture to reset the whole `headroom.*` subtree before each
test.

Scope is intentionally one file (`tests/conftest.py`) — test-harness
only, no production change.

> Design note: I extended the existing defensive fixture rather than
restoring state inside the benchmark, because (a) the fixture already
exists for exactly this and only needed completing, and (b) the same
`propagate=False` hazard also originates from production
`_setup_file_logging`, so a centralized per-test reset is the more
durable fix. Happy to instead make the benchmark restore its own logging
state if maintainers prefer fixing it at the source.

## 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

- Extend the `_reset_headroom_logger_propagation` autouse fixture in
`tests/conftest.py` to reset `propagate = True` for **every** existing
`headroom.*` logger (previously only the top `headroom` logger), so
`caplog` capture is deterministic regardless of test execution order.

## Testing

- [x] Unit tests pass (`pytest`)
- [x] Linting passes (`ruff check .`)
- [ ] Type checking passes (`mypy headroom`) — N/A, change is under
`tests/`
- [ ] New tests added — N/A, this fixes existing tests; they are
themselves the proof
- [x] Manual testing performed

### Test Output

```text
# Causal proof: run the polluter first, then the 5 victims, in one process.

# BEFORE (fixture reset scoped to only "headroom"):
$ pytest tests/test_claude_session_mode_benchmark.py \
         tests/test_corrupt_golden_bytes_recovery.py \
         tests/test_forwarded_headers.py \
         'tests/test_transforms/test_kompress_compressor.py::TestKompressBackendSelection::test_unrecognized_backend_warns_and_falls_back_to_auto'
5 failed, 54 passed
  FAILED tests/test_corrupt_golden_bytes_recovery.py::TestCorruptMemoryGoldenBytes::test_corrupt_bytes_logs_error
  FAILED tests/test_corrupt_golden_bytes_recovery.py::TestCorruptMemoryGoldenBytes::test_unicode_decode_error_handled
  FAILED tests/test_corrupt_golden_bytes_recovery.py::TestCorruptCcrGoldenBytes::test_corrupt_bytes_logs_error
  FAILED tests/test_forwarded_headers.py::test_non_allowlisted_peer_ignores_forwarded_and_logs
  FAILED tests/test_transforms/test_kompress_compressor.py::...test_unrecognized_backend_warns_and_falls_back_to_auto

# AFTER (this PR — whole headroom.* subtree reset):
$ pytest <same selection>
59 passed

# Full suite (Rust core rebuilt locally):
$ pytest
6251 passed, 496 skipped

$ ruff check .
All checks passed!
$ ruff format --check tests/conftest.py
1 file already formatted
```

## Real Behavior Proof

- Environment: macOS, Python 3.13.3, branch off latest `main`, Rust
`_core` rebuilt locally (`uv pip install -e .`).
- Exact command / steps: ran the polluter
(`test_claude_session_mode_benchmark`) together with the 5 victim tests
in one process to reproduce the order-dependent failure, then toggled
**only** the fixture change to confirm causality; then ran the full
`pytest` suite and `ruff`.
- Observed result: scoping the reset to only `"headroom"` → 5 failed /
54 passed; extending it to the `headroom.*` subtree → 59 passed. Full
suite: 6251 passed, 496 skipped, 0 failed. Lint clean.
- Not tested: behavior under CI's sharded `test (N)` jobs specifically —
but the fix is order-independent (resets before *every* test), so
sharding cannot reintroduce the leak.

## 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 — N/A
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective — the 5
previously-flaky tests are the proof
- [x] New and existing unit tests pass locally with my changes
- [ ] I have updated the CHANGELOG.md — N/A (test-harness only)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-authored-by: JerrettDavis <mxjerrett@gmail.com>
 2026-06-26 12:05:26 -05:00
Rod Boev
2cae13dd79
fix(ccr): skip Anthropic marker emission when tool injection is deferred (#1273) 
## Description

Anthropic request-side CCR can still compress a turn into retrieval
markers after the frozen-prefix cache guard suppresses
`headroom_retrieve` registration. That leaves the model with marker-only
context it cannot redeem, so the proxy silently drops recoverable data
on exactly the turns where cache preservation deferred tool injection.
This change couples the Anthropic request-side CCR path to tool
availability so a turn never emits retrieve-only markers without the
retrieval tool, even when token mode or cache-mode prefix replay could
otherwise reuse already-compressed marker text. Closes #1006

After a collaborator merged current `main` into this branch, CI also
picked up unrelated offline-memory failures from the merged base. Those
follow-up changes are test-only: they keep the offline Hugging Face
cache lanes skipping cleanly instead of failing in memory tests that are
outside the CCR runtime path.

## 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

- Couple Anthropic request-side CCR compression to the same
frozen-prefix guard that already defers `headroom_retrieve`
registration.
- Keep the existing cache-preservation behavior: frozen-prefix turns
stop emitting CCR retrieval markers instead of forcing tool injection
into the cached prefix.
- Make the skip decision use the effective frozen prefix after
token-mode reclamping, so turns that genuinely reclamp to zero still
keep normal reversible CCR behavior.
- Bypass cached marker reuse in both token mode and cache-mode prefix
replay when tool injection is deferred.
- Add focused regressions for the Anthropic request-path seams under
this bug:
  - frozen-prefix turns do not emit marker-only payloads
  - unfrozen turns still keep normal reversible CCR behavior
  - token-mode reclamp back to zero still compresses normally
- existing `headroom_retrieve` tools keep reversible CCR on frozen turns
- cache-mode delta reuse and exact-prefix replay both forward original
content when retrieval is unavailable
- Add a `CHANGELOG.md` entry because the proxy's user-visible Anthropic
CCR behavior changes.
- Add a shared test skip helper for offline Hugging Face cache misses
and apply it to the merged `main` memory tests that were failing only in
the offline CI shards after the branch picked up current `main`.

## Testing

- [x] Unit tests pass (`uv run pytest
tests/test_proxy/test_anthropic_ccr_deferred_injection.py`)
- [x] Linting passes (`uv run ruff check . && uv run ruff format .
--check`)
- [ ] Type checking passes (`uv run mypy headroom`)
- [x] New tests added for new functionality when applicable
- [ ] Manual testing performed

### Test Output

```text
uv run pytest tests/test_proxy/test_anthropic_ccr_deferred_injection.py
14 passed, 1 warning in 34.19s

uv run pytest tests/test_memory/test_skip_helpers.py tests/test_memory/test_embedder_mps_serialization.py::test_cpu_uses_shared_executor tests/test_memory/test_hierarchical.py::TestLocalEmbedder::test_embed_single tests/test_memory_bridge.py::TestMemoryBridgeImport::test_import_claude_code_memory tests/test_memory_handler_concurrent_init.py::test_real_localbackend_initializes_via_public_entrypoint tests/test_memory_system.py::TestLocalBackend::test_save_memory_basic -q
4 passed, 5 skipped, 11 warnings in 7.65s

uv run ruff check .
All checks passed!

uv run ruff format . --check
968 files already formatted
```

## Real Behavior Proof

- Environment: local FastAPI `TestClient` for the Anthropic request
path, plus Windows Python 3.12 offline-memory repros with
`TRANSFORMERS_OFFLINE=1`
- Exact command / steps: Run the focused CCR regression command and the
offline-memory repro subset below on the merged branch state.
- `uv run pytest
tests/test_proxy/test_anthropic_ccr_deferred_injection.py`
- `uv run pytest tests/test_memory/test_skip_helpers.py
tests/test_memory/test_embedder_mps_serialization.py::test_cpu_uses_shared_executor
tests/test_memory/test_hierarchical.py::TestLocalEmbedder::test_embed_single
tests/test_memory_bridge.py::TestMemoryBridgeImport::test_import_claude_code_memory
tests/test_memory_handler_concurrent_init.py::test_real_localbackend_initializes_via_public_entrypoint
tests/test_memory_system.py::TestLocalBackend::test_save_memory_basic
-q`
- Scenario coverage from the CCR pytest command:
- frozen prefix with deferred tool injection and cached marker text
available in token mode
  - unfrozen turn with normal CCR marker emission
  - token mode where the tracked frozen prefix reclamps back to zero
  - frozen prefix where the client already supplied `headroom_retrieve`
- cache-mode append-only delta reuse with a previously forwarded
compressed prefix
- cache-mode exact-prefix replay where the previous forwarded prefix
already contained a marker
- Scenario coverage from the offline-memory repro command:
  - direct local embedder startup on CPU with no cached HF model
- hierarchical memory embedder startup with offline model cache missing
  - bridge import through `LocalBackend`
  - `MemoryHandler` public init warmup path
  - `LocalBackend` save path under the offline lane
- Observed result: The CCR regression keeps marker-free forwarding on
frozen turns without tool availability, and the merged-`main`
offline-memory lanes now skip cleanly instead of failing unrelated CI
shards.
- frozen-prefix Anthropic turns without tool availability forward the
original long transcript across both token-mode and cache-mode reuse
paths, while unfrozen turns, reclamped token-mode turns, and frozen
turns that already advertise `headroom_retrieve` keep the reversible CCR
marker path
- the merged-`main` offline-memory regressions now skip cleanly when the
Hugging Face cache is unavailable instead of failing unrelated CI shards
- Not tested: live Zed session cache-hit behavior, provider latency
under real Anthropic upstreams, and online Hugging Face download lanes

## 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
- [x] 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
- [x] New and existing unit tests pass locally with my changes
- [x] I have updated the CHANGELOG.md if applicable

## Additional Notes

- Runtime scope is still intentionally narrow to Anthropic request-side
CCR. OpenAI, Gemini, streaming, and response-side CCR behavior are
unchanged.
- The only non-CCR diff is the test-only offline-memory follow-up
required after current `main` was merged into the branch.
- The focused proxy pytest run still emits the Windows-local
`StarletteDeprecationWarning` from `fastapi.testclient`'s `httpx`
bridge. The offline-memory repro command also emits existing datetime
deprecation warnings and a pytest teardown warning around skipped
offline lanes; none of those warnings were introduced by the CCR runtime
change.
 2026-06-23 12:48:05 -05:00
Rudimar Ronsoni
b4571cc346
feat: headroom wrap opencode / unwrap opencode CLI (#1105) 
## Summary

This PR implements transparent `headroom wrap opencode` support without
asking users to edit OpenCode provider URLs, choose an extra CLI flag,
or maintain a static provider list.

The wrapper now lives at the runtime transport boundary: OpenCode keeps
its user/provider config, while Headroom intercepts outbound provider
traffic in-process and routes it through the local Headroom proxy.

## What changed

### Transparent OpenCode wrapping

- `headroom wrap opencode` injects the `headroom-opencode` plugin
through `OPENCODE_CONFIG_CONTENT`.
- Existing OpenCode provider URLs are preserved. We do not rewrite user
config URLs to point at Headroom.
- Existing `OPENAI_BASE_URL` and `ANTHROPIC_BASE_URL` env vars are
preserved.
- Local OpenCode traffic, localhost traffic, and Headroom proxy traffic
bypass the shim to avoid loops.

### Runtime transport interception

- Added an OpenCode plugin transport shim that wraps:
  - `globalThis.fetch`
  - `http.request` / `http.get`
  - `https.request` / `https.get`
- External provider calls are routed to the local Headroom proxy.
- The original upstream origin is passed through `x-headroom-base-url`,
so the proxy can forward to the real provider without changing OpenCode
config.
- External `http2.connect` is blocked loudly instead of allowing direct
provider traffic to leak outside Headroom.

### Live provider additions

Provider coverage is no longer based on a static config scan. Because
routing happens at outbound request time, providers added mid-session
are routed through Headroom automatically as long as they use the
covered Node transport paths.

### Subagent and child-process coverage

- The parent OpenCode plugin sets a packaged Node preload shim through
`NODE_OPTIONS=--import=.../hook-shim/handler.js`.
- The transport shim patches `child_process.spawn`, `exec`, `execFile`,
and `fork` so child Node processes receive the Headroom preload even
when OpenCode passes a custom `env`.
- The child-process shim fails closed if it loads without
`HEADROOM_OPENCODE_TRANSPORT_PROXY_URL`.
- This closes the subagent leak path where a child Node process could
otherwise start without Headroom transport interception.

## Why this goes beyond PR #1089

PR #1089 improves OpenCode provider registration, but it still focuses
on provider config shape. This PR moves the enforcement boundary to
runtime transport interception.

This PR goes further because:

- No provider URL rewriting is required.
- New providers added mid-session are covered automatically.
- Subagents and child Node processes inherit the Headroom transport
shim.
- Direct external HTTP/2 paths fail loudly instead of leaking.
- The wrap remains transparent to the user's OpenCode provider config.
- The wrapper is fail-closed for unsupported child-process preload
state.

## Additional robustness fixes

While validating the change in Docker, the full Python suite exposed
unrelated Linux/container robustness issues. These are fixed in this PR
so the suite is green:

- Binary cache handling now treats cache paths under a non-writable
existing parent as unavailable, including when tests run as root in
Docker.
- `release_version.py` honors `MANUAL_VER` before git calls so direct
script execution works outside a `.git` checkout.
- Test logger isolation now resets relevant Headroom child loggers so
proxy logging setup cannot poison later `caplog` tests.
- The scanner missing-path test now uses a guaranteed missing `tmp_path`
child instead of relying on `/nonexistent/path`.

## Validation

All implementation validation was run inside Docker.

- Full Python suite from a fresh Docker copy: `6605 passed, 523
skipped`.
- Ruff on changed Python/OpenCode paths: passed.
- OpenCode plugin typecheck: passed.
- OpenCode plugin tests: `9 passed`.
- OpenCode plugin build: passed.
- Hook shim preload smoke test: passed.

## Notes

This PR intentionally does not add a CLI option. `headroom wrap
opencode` means full wrap. Either Headroom wraps OpenCode transparently,
or the path fails loudly instead of silently leaking provider traffic.

---------

Co-authored-by: Rudimar Ronsoni <6081613+rudironsoni@users.noreply.github.com>
 2026-06-22 11:07:12 -05:00
chopratejas
967b0db439 fix: B1 — retire ICM, RollingWindow, scoring, relevance + dependents 
Phase B step 1 of the live-zone-only realignment. Removes ~10K LOC of
"drop messages from history" machinery that became unreachable after
PR-A1 made `/v1/messages` a passthrough on the proxy. Live-zone-only
compression (PR-B2..B7) operates on content blocks within messages;
message-list mutation no longer happens in the pipeline.

Python deletes:
- headroom/transforms/intelligent_context.py (1077 LOC)
- headroom/transforms/rolling_window.py (395 LOC)
- headroom/transforms/progressive_summarizer.py (508 LOC)
- headroom/transforms/scoring.py (459 LOC)
- headroom/transforms/tool_crusher.py (338 LOC)
- 5 corresponding tests/test_transforms/* and tests/test_proxy_intelligent_context.py

Rust deletes:
- crates/headroom-core/src/context/* (manager, config, workspace,
  candidate, ccr_drop, strategy/, mod) + safety.rs replaced
- crates/headroom-core/src/scoring/* (mod, score, scorer, traits, weights)
- MessageScorerComparator from crates/headroom-parity (PR #338/#343
  becomes deletable; sunk cost stays sunk)
- 13 message_scorer fixtures + record_message_scorer.py

Rust adds (move + rewrite):
- crates/headroom-core/src/transforms/safety.rs — `tool_pair_indices`
  preserves the OpenAI/Anthropic tool_use ↔ tool_result pairing rule
  the live-zone dispatcher (PR-B2) needs. No IcmConfig dependency.

Surface refactors:
- HeadroomConfig: drop `tool_crusher`, `rolling_window`,
  `intelligent_context` fields; hoist `output_buffer_tokens` to top
  level (used by client.py).
- ProxyConfig: drop `intelligent_context*` fields.
- `headroom wrap` proxy server: retire IntelligentContextManager
  and RollingWindow imports + branch; pipeline is CacheAligner →
  ContentRouter (smart_routing) or CacheAligner → SmartCrusher
  (legacy).
- CLI: drop `--no-intelligent-context`, `--no-intelligent-scoring`,
  `--no-compress-first` flags.
- LangChain memory integration: rename `_apply_rolling_window` →
  `_apply_compression`, drop RollingWindowConfig dep. Threshold is
  now advisory — B6 will rework the contract.
- TransformPipeline.create_pipeline now takes only cache_aligner_config.
- headroom/__init__.py + headroom/transforms/__init__.py: strip
  exports of deleted symbols.

Bug fixes uncovered by full pytest sweep:
- providers/copilot/wrap.py: `environ or os.environ` collapsed
  empty-dict to falsy → callers passing `environ={}` accidentally
  pulled from os.environ. Use `environ if environ is not None else
  os.environ`.

Test correctness fixes:
- _DummyAnthropicHandler._retry_request gains **_kwargs to match
  the real handler signature post-A8.
- test_ws_http_fallback extracts JSON from `content=` (post-A3
  byte-faithful) rather than the obsolete `json=` kwarg.
- test_ccr_response_handler_extra fixture joins SSE events with
  `\n\n` per spec (post-A8 byte-buffer parser requirement).
- test_proxy_responses_phase_preservation: capture via direct
  handler attached to the named logger, so the assertion is
  order-independent (proxy `_setup_file_logging` flips
  `headroom.propagate=False` once any earlier test triggers it).
- conftest.py autouse fixture resets `headroom.propagate=True`
  before each test as a defensive measure for the same pollution.
- test_wrap_copilot_translated_backend_still_requires_byok:
  monkeypatch.delenv every provider key so the BYOK error
  actually fires.
- test_native_installers: skip when system bash < 4.3 (macOS ships 3.2).
- TestGeminiEmbedContent / TestGeminiBatchEmbedContents:
  pytest.mark.skip — proxy currently has no :embedContent route;
  feature gap, not regression.

Acceptance:
- cargo build --workspace + cargo clippy + cargo fmt --check: green.
- cargo test --workspace --exclude headroom-py: 777 passed.
- pytest: 4892 passed, 240 skipped, 0 failed.
- git grep returns only intentional comments referencing the deletion.

Per-PR-B1 plan: REALIGNMENT/04-phase-B-live-zone.md.
 2026-05-02 12:23:17 -07:00
chopratejas
fca68f0cbe Add global httpx.ReadTimeout handler for all tests 
Move the network timeout skip handler to the main tests/conftest.py
so it applies to all tests, not just tests/test_memory/*.

Fixes flaky CI failures when HuggingFace model downloads timeout.
 2026-01-30 16:37:34 -08:00
chopratejas
c850ccc3b2 Replace legacy memory system with HierarchicalMemory 
Major refactor of the memory module:

- Add hierarchical scoping (user → session → agent → turn)
- Add temporal versioning with supersession support
- Add pluggable adapters (SQLite store, HNSW vectors, FTS5 text search)
- Add protocol interfaces (ports) for all memory components
- Update LRUMemoryCache to implement async MemoryCache protocol
- Update wrapper.py to use HierarchicalMemory backend
- Preserve with_memory() one-liner API with zero-latency inline extraction

New files:
- adapters/: sqlite.py, hnsw.py, fts5.py, cache.py, embedders.py
- core.py: HierarchicalMemory orchestrator
- models.py: Memory, MemoryCategory, ScopeLevel
- ports.py: Protocol interfaces (MemoryStore, VectorIndex, etc.)
- config.py: MemoryConfig with backend selection
- factory.py: Component creation from config

Removed legacy files:
- store.py, fast_store.py, extractor.py, worker.py, fast_wrapper.py

Breaking change: Removes legacy memory API (pre-0.3.0)
 2026-01-22 23:28:21 -08:00
chopratejas
e4a41faa33 Fix all ruff lint and format errors for CI 
- Fix E402: Move module-level imports to top of file
- Fix F401: Add noqa for availability check imports
- Fix F402: Rename loop variables shadowing imports
- Fix E722: Replace bare except with except Exception
- Fix B904: Add exception chaining (from e)
- Fix F811: Remove duplicate imports
- Fix B027: Add noqa for empty close() method
- Fix E741: Rename ambiguous variable l -> label
- Fix I001: Import sorting issues
- Apply ruff format to all 106 files

All 902 tests pass.
 2026-01-10 15:33:44 -08:00
chopratejas
9c7d4512d6 Initial commit: Headroom SDK - LLM context optimization toolkit 
A comprehensive SDK for optimizing LLM context windows, reducing token
usage while preserving critical information for AI agents.

Core Features:
- SmartCrusher: Statistical compression of tool outputs (70-85% reduction)
- CacheAligner: Prefix optimization for prompt cache hits
- RollingWindow: Intelligent context window management
- BM25/Hybrid relevance scoring for smart item selection

Integrations:
- OpenAI and Anthropic provider support
- LangChain integration (ChatModel, Callbacks, Runnable)
- MCP (Model Context Protocol) integration for tool compression

Test Coverage:
- 372 tests passing across all modules
- 35 performance benchmarks
- Real-world agent evaluations with 88% token savings

Key Components:
- headroom/transforms/: Core compression transforms
- headroom/providers/: OpenAI and Anthropic support
- headroom/integrations/: LangChain and MCP integrations
- headroom/relevance/: BM25 and hybrid scoring
- headroom/pricing/: Model pricing registry
- benchmarks/: Performance benchmark suite
- examples/: Usage examples and demos
 2026-01-06 23:16:58 -08:00