Files
arah2/search/test
araharah-executor 6368bad3d5 feat(04-01): OSA Damerau distance + disjoint-tier scorer (the residual net)
- distance.ts: hand-rolled 3-band OSA, adjacent transposition = 1 edit,
  zero imports (D-07); the row rotation is pinned by the D1-D9 vectors
- score.ts: TIER bands strictly disjoint descending — EXACT 1.00 /
  ALIAS_EXACT 0.90 / PREFIX 0.75 / TOKEN_SET 0.65 / FUZZY as the 0.60
  CEILING (a fuzzy score is fuzzySim * 0.60, never a 0.00 multiplier);
  FUZZY_ADMIT_SIMILARITY = 0.72 exported for source.ts + the corpus
  runner; token-level residual lets 'Sentrl' reach 'KL Sentral' while
  'Jln Tun Razak' cannot reach 'Jalan Ampang'
- scoreCandidate returns the RAW matched alias (corpus provenance);
  an exact ALIAS hit rides ALIAS_EXACT so a name-exact outranks it
- score.test.mjs S7 corrected during GREEN: admission belongs to
  source.ts — scoreCandidate asserts the sub-floor similarity instead

D1-D9 + S1-S7 green; typecheck clean.
2026-10-24 00:32:44 +08:00
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