release: v5.12.0 — "Auto-calibration" (B8b)

Version-sync for the B8b model→window auto-probe shipped in cf75249:
- plugin.json 5.11.0 -> 5.12.0
- README version badge + version-history row (1296 tests)
- CHANGELOG [5.12.0] entry

Scanner count stays 16, agents 7, commands 21. No new finding ID or scanner.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "config-audit",
   "description": "Multi-agent workflow for analyzing, reporting, and optimizing Claude Code configuration across your entire machine",
-  "version": "5.11.0",
+  "version": "5.12.0",
   "author": {
     "name": "Kjell Tore Guttormsen"
   },

CHANGELOG.md

@@ -5,6 +5,42 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [5.12.0] - 2026-06-23
+
+### Summary
+"Auto-calibration" — completes the deferred half of B8. `--context-window auto` now **probes the
+configured model** and calibrates SKL/CML budgets to its real context window, instead of always
+falling back to the conservative advisory anchor. A 1M-tier host self-calibrates without the manual
+`--context-window 1000000`. No new finding ID or scanner (count stays **16**, agents **7**, commands
+**21**); the default and explicit `--context-window` paths are unchanged, so `--json`/`--raw` stay
+byte-stable and the frozen v5.0.0 + SC-5 snapshots are untouched. **1296** tests.
+
+### Added
+- **B8b — model→window auto-probe.** `lib/context-window.mjs` gains a pure `modelToContextWindow()`
+  that maps a configured model id/alias to its context window:
+  - the explicit `[1m]` tier tag wins (the running session model surfaces as e.g.
+    `claude-opus-4-8[1m]`);
+  - known 1M-tier families `LARGE_CONTEXT_MODEL_IDS` (`claude-fable-5`, `claude-opus-4-8`,
+    `claude-opus-4-7`, `claude-opus-4-6`, `claude-sonnet-4-6` — verified June 2026 against the
+    platform.claude.com models overview) match by substring, so dated (`-20260528`) and
+    provider-prefixed (`us.anthropic.…`) IDs resolve too;
+  - the short aliases `opus` / `sonnet` / `fable` / `opusplan` resolve to 1M.
+  - Models we cannot confirm (Haiku, older 200k-era IDs, unknown) return `null` — the caller then
+    keeps the conservative anchor rather than guess a relaxed budget.
+- **New IO helper `lib/active-model.mjs` `resolveActiveModel()`** reads the configured model the way
+  Claude Code resolves it: the shell `ANTHROPIC_MODEL` override first, otherwise the settings cascade
+  `model` field (user `~/.claude` → project `.claude` → project-local, local wins). Reads the cascade
+  files directly (like `isBundledSkillsDisabled`) and takes an injectable `env`, so it stays
+  deterministic and hermetic under the test HOME. Returns `null` when no model is pinned anywhere.
+
+### Changed
+- **`resolveContextWindow(arg, opts)` — the `auto` branch now probes.** It maps `opts.model` via
+  `modelToContextWindow()`: a recognized 1M-tier model calibrates to its window (source `auto-probed`,
+  **not** advisory); an unknown or unpinned model keeps the conservative 200k anchor and stays advisory
+  (source `auto-unresolved`, the pre-B8b `auto` behavior). `scan-orchestrator` resolves the active
+  model (only when the flag is `auto`) and threads it in; `posture` inherits this via `runAllScanners`.
+  The default (no flag) and explicit `--context-window <n>` paths ignore `opts.model` and are unchanged.
+
 ## [5.11.0] - 2026-06-23
 
 ### Summary

README.md

@@ -6,7 +6,7 @@
 
 *AI-generated: all code produced by Claude Code through dialog-driven development. [Full disclosure →](../../README.md#ai-generated-code-disclosure)*
 
-![Version](https://img.shields.io/badge/version-5.11.0-blue)
+![Version](https://img.shields.io/badge/version-5.12.0-blue)
 ![Platform](https://img.shields.io/badge/platform-Claude_Code_Plugin-purple)
 ![Scanners](https://img.shields.io/badge/scanners-16-cyan)
 ![Commands](https://img.shields.io/badge/commands-21-green)
@@ -662,6 +662,7 @@ This plugin is cautious by design — configuration files are important, and a b
 
 | Version | Date | Highlights |
 |---------|------|-----------|
+| **5.12.0** | 2026-06-23 | "Auto-calibration" — completes the deferred B8 half (**B8b**): `--context-window auto` now **probes the configured model** instead of always falling back to advisory. New pure `modelToContextWindow()` maps known 1M-tier model IDs (Fable 5, Opus 4.8/4.7/4.6, Sonnet 4.6 — verified June 2026 — plus the explicit `[1m]` tier tag, dated/provider-prefixed IDs, and the `opus`/`sonnet`/`fable` aliases) to the 1M window; new IO helper `lib/active-model.mjs` `resolveActiveModel()` reads the model the way Claude Code resolves it (shell `ANTHROPIC_MODEL` override, then the settings cascade local > project > user). When `auto` resolves a recognized model the budget calibrates to its window (`auto-probed`, not advisory); when no model is pinned or it is unrecognized it keeps the conservative anchor and stays advisory (`auto-unresolved`) — the honest fallback. No new finding ID or scanner (count stays **16**, agents **7**, commands **21**); the default and explicit `--context-window` paths are unchanged, so `--json`/`--raw` stay byte-stable and the frozen v5.0.0 + SC-5 snapshots are untouched. **1296** tests. |
 | **5.11.0** | 2026-06-23 | "Precision polish" — the two LOW-priority calibration gaps, both additive (scanner count stays **16**, agents **7**, commands **21**; `--json`/`--raw` byte-stable, frozen v5.0.0 + SC-5 untouched). **B7 — oversized skill body (`CA-SKL-003`, low):** the SKL scanner now measures the SKILL.md **body** (it already read the file in full) and flags bodies over ~5,000 tokens, recommending a supporting-file split + `context: fork`. Honestly framed as an **on-demand** cost — the body loads only when the skill is invoked, **not** every turn like the always-loaded listing — hence low severity. **B8 — context-window calibration (`--context-window`):** `CA-SKL-002` (skill-listing budget) and the CML char-budget now calibrate to a real context window via `--context-window <n>` (e.g. `1000000` stops the 200k anchor crying wolf on a 1M host) instead of always anchoring at 200k; `--context-window auto` keeps the conservative anchor but **downgrades budget findings to info/advisory** rather than firing a breach (model→window auto-probing deferred to a later B8b). No flag → byte-identical to the pre-B8 200k default. CPS is intentionally excluded (no window-anchored budget to calibrate). 1279 tests |
 | **5.10.0** | 2026-06-23 | "Deferral & injection hygiene" — three additive hardening levers that extend existing scanners toward a tighter always-loaded prefix (scanner count stays **16**, agents **7**, commands **21**; `--json`/`--raw` byte-stable, frozen v5.0.0 + SC-5 untouched). **B4 — MCP tool-schema deferral (`CA-TOK-006`; tokens patterns 7→8):** Claude Code defers MCP tool schemas (names-only, ~120 tok; full schemas load on demand) by default, so `CA-TOK-006` detects config-file signals that force the FULL schemas into the always-loaded prefix every turn — `env.ENABLE_TOOL_SEARCH="false"` (high), a `"ToolSearch"` deny (high), a configured Haiku model (medium), or per-server `alwaysLoad:true` (CC v2.1.121+, high); severity scales with the aggregate forced-upfront tokens. New pure engine `lib/mcp-deferral.mjs` shared by TOK + GAP, plus a feature-gap **CLI-over-MCP** companion lever (prefer `gh`/`aws`/`gcloud`). Triggers on config files ONLY — Vertex / custom `ANTHROPIC_BASE_URL` / a runtime `/model` switch are launch state and are disclosed, never triggered; the prefix-cache-invalidation claim was NOT-CONFIRMED in docs and is not asserted. **B5 — hook `additionalContext` advisory + filter-before lever:** HKV emits an info advisory when a hook injects unfiltered output into `additionalContext`, with a feature-gap **filter-before-Claude-reads** companion citing the documented `filter-test-output.sh` pattern. **B6 — CPS `@import` volatile scan:** the cache-prefix scanner now follows `@import`s (one hop) and flags volatile content in the imported file that breaks the cached prefix — a new medium finding, keyed on the resolved file. 1257 tests |
 | **5.9.0** | 2026-06-23 | "Machine-wide token lens" — the three highest-impact hardening gaps toward whole-machine token tuning. **B1 — agent-listing budget (new orchestrated scanner AGT, count 15→16):** the always-loaded agent listing (name+description re-sent every turn) is now measured — `CA-AGT-001` per-agent description bloat (advisory), `CA-AGT-002` aggregate listing over budget; both LOW and explicitly **inferred / upper-bound** (the mechanism is undocumented — the evidence discloses it rather than overstating). **B2 — machine-wide always-loaded token roll-up:** the campaign ledger now carries a token bill — `campaign refresh-tokens` does a live cross-repo sweep that counts the **shared global always-loaded layer once** + per-repo deltas, with a ranked "most expensive repos" table (the `whats-active` double-count, avoided by construction). **B3 — cache-aware filtering (folds in B0):** `~/.claude/plugins/cache` holds *both* active and stale plugin versions (installPaths point INTO it), so token-hotspots + CNF are now **version-aware** — `--exclude-cache` (default ON) keeps each plugin's active version and drops only stale ones (`installed_plugins.json`-driven), so stale versions stop polluting the hotspot ranking and inflating duplicate-hook conflicts; stale versions surface as a separate **Dead config** disk-cleanup finding (zero live-context impact). `--json`/`--raw` byte-stable; frozen v5.0.0 + SC-5 snapshots untouched. 1215 tests |