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## What Splits **read maturation (Mechanism B)** out of #818 into its own PR, so #818 can stay focused on the other compression knobs + the SQLite CCR store. Audit-reads (traffic audits) stays in #818. Read maturation holds fresh large `Read` outputs **out of the provider prefix cache** while their file is still active, keeps them verbatim the whole time the model is working with them, and **matures** them into a CCR-backed marker once the file has been quiet for `quiesce_turns`. Only the final compressed form ever enters the cache, so **no cached byte is ever mutated — there is nothing to bust.** Activity-based rather than a fixed hold window: the `audit-reads` simulation showed next-touch gaps are fat-tailed (p50 = 4 turns, p90 = 81), so no fixed window covers the tail while a quiesce rule covers the activity cluster and lets the tail self-heal via partial-range re-reads. **Default OFF** — experimental, flag/env gated, validated in pilots first. ## Changes - `config.ReadMaturationConfig` (`enabled=False`, `quiesce_turns=5`, `max_hold_turns=25`, `min_size_bytes=2048`) - `ProxyConfig` fields mirroring the above - `ReadMaturationManager` transform + `relocate_cache_breakpoint` (`headroom/transforms/read_maturation.py`) - Session-scoped manager rides on `PrefixCacheTracker` — shares the session's cache affinity and TTL cleanup - Handler wiring in `anthropic.py`: runs **after** compression (so `read_lifecycle` markers are respected) and **before** body assembly; advisory — never fails the request - CLI flags + env vars (`--read-maturation*` / `HEADROOM_READ_MATURATION*`) - `_proxy_config_from_env` wiring for both the multi-worker and CLI server paths ## Bug fix included The `--read-maturation` flag was missing `envvar="HEADROOM_READ_MATURATION"`, so the env var was silently ignored on the CLI path (only the multi-worker `_proxy_config_from_env` path read it). Fixed here. ## Tests - `tests/test_read_maturation.py` — unit - `tests/test_read_maturation_handler_nobust.py` — handler never busts cache - `tests/test_live/test_live_maturation.py` — live harness `25 passed` locally; ruff check/format clean; mypy clean (only pre-existing `annotation-unchecked` notes). |
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| .. | ||
| __init__.py | ||
| conftest.py | ||
| test_live_anthropic.py | ||
| test_live_maturation.py | ||
| test_live_openai.py | ||