- tools/idiom_hunt.py: group backlog near-misses by residual class -> GLM names the reusable idiom +
emits corrected C -> byte-gate to validate; captures reasoning; HARD --budget cap
- CALIBRATION ($0.51 total, 2 classes): struct + regalloc-order -> 0 banks. GLM re-derives our OWN
idioms (register-pin §17, array-of-struct §18, type-width §25) and confirms walls, but banks nothing
new — the backlog near-misses are the residual our idioms already failed on (irreducible/def-side wall).
- VERDICT: the new-idiom well is DRY (Fable5 review confirmed empirically for $0.51, not $300 overnight).
GLM's value stays: direct drafter for FRESH def-conflict-free hard fns (~22%), not an idiom generator.
Drew T