`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
Kjell Tore Guttormsen
3d6ddb273c