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967b0db439
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.
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