The gate at a fixed 0.80 couldn't catch the real pain: Interpreter (fresh ==
cached, verified by probe) confidently mis-detects short ASCII English like
"... WIP Part 1" as German at 0.86 — above the floor — so it was accepted and a
re-translate reproduced it. Confidence alone can't separate the 0.86 collision
(genuine German lands there too), and single-word mis-flags sit at a confident
1.0 no floor catches.
Two operator-approved levers:
- Acceptance floor is now a live Settings value (ImportSettings.
translation_min_confidence, default 0.90; surfaced in the Translation card), so
it's tunable without a redeploy. _accept takes the threshold as a parameter.
- Per-post sticky override (Post.translation_override: auto/force/original).
'force' stores a translation even below the floor (rescue a skipped
legit-foreign title); 'original' keeps the original and clears any stored
translation (kill a confident mis-flag no floor catches). The sweep honors it
on every run and _reset_translations skips 'original', so the choice survives a
Re-translate-all. POST /api/posts/<id>/translation-override applies it
immediately (translate now when the service is up, else queue for the sweep).
UI: PostTranslationControl on the posts-feed card.
Migration 0084 (both columns + a CHECK on the override). The feed + provenance
serializers expose translation_override.
With a stricter floor the rollback finally works: raise it -> Re-translate all ->
the 0.86 mis-flags are rejected and restored to the original; force /
keep-original handle the residual either way.
Tests: gate thresholds against the param (0.86 rejected at 0.90, explicit-floor
cases); sweep force/original + re-translate-skips-original; override endpoint
(validation, original clears, force queues when disabled, feed exposes it);
settings min_confidence default/save/validate.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CgZP9v2otxVJymiYsnVuMy
