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704fb2f19d
P0-1: Delete `_inject_system_context` from `proxy/server.py`. Memory context now routes exclusively to the first text block of the latest non-frozen user message via `_append_context_to_latest_non_frozen_user_turn` (promoted to the canonical default in handlers/anthropic.py). Mirror applied to OpenAI Responses API at handlers/openai.py: `body["instructions"]` is no longer mutated; memory context appends to the latest user item in `body["input"]`. P2-23: Replace `headroom/transforms/cache_aligner.py` with a detector-only implementation. The legacy rewrite path (~400 LOC) is removed. The volatile- content detector uses no regex — UUIDs via `uuid.UUID`, ISO 8601 via `datetime.fromisoformat`, JWT shape via base64url segment-count check, hex hashes via length + `int(token, 16)` validation. Volatile findings surface through `cache_metrics`/`warnings`/`logger.warning`; the prompt is never mutated. Configurability: new env var `HEADROOM_MEMORY_INJECTION_MODE` with values `live_zone_tail` (default) and `disabled`. No `system_prompt` value — that path is permanently retired. Structured logs: every memory injection emits `event=memory_injection` with `decision`, `bytes_injected`, `query_hash` (BLAKE2b, never raw query), `session_id`, `request_id`. Auth is never logged. Tests: - Add `tests/test_proxy_system_prompt_immutable.py` (7 tests). - Add `tests/test_cache_aligner_detector_only.py` (20 tests). - Replace `tests/test_transforms/test_cache_aligner.py` (rewrite-path tests, 58 cases) with detector-only behavior. - Update `tests/test_acceptance.py::TestDateTrap` to pin the new detector-only contract. Acceptance: - `git grep -n "_inject_system_context\|_inject_to_system_or_instructions" headroom/` returns nothing. - `git grep -n "import re\|from re import" headroom/transforms/cache_aligner.py` returns nothing. - Targeted suite (`test_proxy_system_prompt_immutable.py`, `test_cache_aligner_detector_only.py`, `test_proxy_anthropic_cache_stability.py`, `test_acceptance.py::TestDateTrap`, `test_memory*.py`, `test_cli/`) green. |
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| .. | ||
| __init__.py | ||
| test_code_compressor.py | ||
| test_content_router.py | ||
| test_diff_compressor.py | ||
| test_diff_compressor_rust_parity.py | ||
| test_html_extractor.py | ||
| test_intelligent_context.py | ||
| test_kompress_compressor.py | ||
| test_progressive_summarizer.py | ||
| test_read_lifecycle.py | ||
| test_rolling_window.py | ||
| test_scoring.py | ||
| test_smart_crusher_bugs.py | ||
| test_smart_crusher_ccr_roundtrip.py | ||
| test_smart_crusher_lossless_default.py | ||
| test_smart_crusher_rust_parity.py | ||
| test_tag_protector.py | ||
| test_tool_crusher.py | ||