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fix(scanners): the fix engine downgraded a near-miss on xhigh to high (C2)

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`fix-engine.mjs` carried its own copy of the valid `effortLevel` list, and
that copy had gone stale on `xhigh` (CC 2.1.154's top Opus tier) while
`settings-validator.mjs` had all five. The nearest-match "fix" therefore
corrected `xhig` — and `XHIGH` — to `high`: the tool silently changed the
tier the user asked for, in the one code path whose whole job is to write
the corrected value back to disk.

Fixed by sharing the validator's table instead of aligning the copy, so the
two cannot drift again. Guard asserts the blanket invariant — a one-character
near-miss on EVERY valid tier corrects back to that same tier — rather than
pinning the one level that happened to be missing; verified red against the
original stale array.

Suite 1488/0. Frozen v5.0.0 snapshots untouched.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014P6Rh59Mtj4uYrdYMCYZJE
This commit is contained in:
Kjell Tore Guttormsen 2026-08-09 21:29:00 +02:00
commit 3d6ddb273c
3 changed files with 52 additions and 4 deletions
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scanners/settings-validator.mjs
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@ -71,8 +71,11 @@ const TYPE_CHECKS = new Map([
['wheelScrollAccelerationEnabled', 'boolean'],
]);
/** Valid effortLevel values (CC 2.1.154 added 'xhigh' as the Opus-4.8 top tier) */
const VALID_EFFORT_LEVELS = new Set(['low', 'medium', 'high', 'xhigh', 'max']);
/** Valid effortLevel values (CC 2.1.154 added 'xhigh' as the Opus-4.8 top tier).
* Exported because the fix engine's nearest-match needs the SAME list: a second
* copy there had gone stale on `xhigh` and quietly corrected near-misses on the
* top tier down to `high` (C2). One table, no drift. */
export const VALID_EFFORT_LEVELS = new Set(['low', 'medium', 'high', 'xhigh', 'max']);
/** v5 M6: warn when additionalDirectories grows beyond this — each entry adds
* a project root to walks/discovery, inflating per-turn cost and confusing scope. */