CPS originally inspected only files discovery classifies as claude-md, but a
CLAUDE.md can pull arbitrary files into the cached prefix via @import — and
those targets (e.g. @shared/conventions.md) are usually not claude-md in
discovery, so their inlined content was never scanned. Neither TOK Pattern A
(top-30 of cascade files) nor the in-file CPS scan reaches past the importing
file, so volatility inside an imported file was invisible.
B6 closes the gap: for each @import whose import site sits within the
cached-prefix window (imp.line <= CACHED_PREFIX_LINES), CPS resolves the path
(resolveImportPath, mirroring import-resolver/token-hotspots semantics), reads
the target, and runs findVolatileLines over its first 150 lines. A hit emits a
distinct medium finding — "Volatile content in @imported file breaks cached
prefix" — keyed on the resolved file, evidence naming the importer.
Scope boundaries (deliberate):
- One hop only; imports-of-imports stay with IMP (deep-chain owner).
- No lines-1-30 skip for imported content — that exclusion is root-file-specific
to avoid Pattern A overlap, which never reaches imported files.
- No double-reporting: an import resolving to a discovered claude-md is skipped
(own iteration); a reportedImports set dedupes a target imported by several
CLAUDE.md files.
Dropped from B6 (per plan verdict): confident behavioral cache-buster detection
(opusplan/model-switch is runtime, not static config) and jq-transcript
automation. "No overstated behavioral finding ships" — even the permitted
opusplan info-advisory was left out; the @import extension is the whole of B6.
Byte-stability: the in-file finding keeps the same condition + byte-identical
evidence/description (continue-skip refactored to if-emit, behaviour-preserving);
new findings fire only on a volatile import, which no frozen v5.0.0 fixture has.
docs: README + scanner-internals CPS rows + full B6 note; CLAUDE.md kept lean
([skip-docs]). Suite 1254 -> 1257 green; snapshots + SC-5 untouched.
Version/badges/CHANGELOG wait for the v5.10 release cut.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Fase 4 token-opt, Item 1 of gap-review NEXT STEP #2. The prompt-cache pattern corpus + TOK scanner were frozen at an "Opus 4.7" framing after CC shipped Opus 4.8 (default, 2.1.154) and Fable 5 (2.1.170). Model-era facts re-verified against the official changelog cache before editing.
The patterns are properties of prompt-caching, not of any model, so mechanic text is now model-neutral with a single "current default: Opus 4.8" anchor — preventing a re-freeze at the next model bump.
- rename knowledge/opus-4.7-patterns.md -> prompt-cache-patterns.md (git mv, history preserved); 6 reference sites updated
- TOK scanner: line-318 finding text (human-facing) made model-neutral; header + cache-prefix-scanner + CLI comments refreshed
- configuration-best-practices.md body + footnote 4.7 -> 4.8
- human-facing docs: commands/{tokens,help,manifest}.md, project CLAUDE.md, README, docs/scanner-internals.md
- gap-matrix row marked DONE; future Items 2/3 retargeted to new filename
Failing-test-first (Iron Law): +2 knowledge staleness guards (era-anchor + no-refreeze) +1 scanner assertion (no stale model anchor in finding text). Suite 853 -> 856 green; zero snapshot drift; self-audit A(97) PASS. CHANGELOG / v5 plan / ratified gap-plan keep historical opus-4.7-patterns refs (correct record of past state).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ter3E2JSi1Khgmuf2kady8
New CPS scanner walks CLAUDE.md cascade and flags volatile content
between lines 31 and 150 — the cache-prefix window beyond TOK Pattern
A's top-30 territory. Volatile content anywhere in the cached prefix
forces a fresh cache write from that line down on every turn.
Volatile-pattern set extends TOK Pattern A with:
- shell-exec lines (! prefix) — common in CLAUDE.md to inject git/date
- ${VAR} substitutions — vary per-shell, defeat cache reuse
Severity: medium per finding. Skips lines 1-30 to avoid duplicating
Pattern A's range; CPS' value is in the 31-150 zone.
Wired into scan-orchestrator + scoring SCANNER_AREA_MAP. CPS shares
the "Token Efficiency" area with TOK; scoreByArea now deduplicates by
area name and combines counts across scanners contributing to the
same area, so the 9-area scorecard contract holds.
Fixtures volatile-mid-section/{volatile-line-60, volatile-line-200}
verify both positive (line 60) and out-of-window (line 200) cases.
[skip-docs] reason: v5 plan fences off README/CLAUDE.md badge updates
to Session 5; Forgejo pre-commit-docs-gate hook requires this tag.
Tests: 604 → 611 (+7).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
