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ISC Migration — Master TODO Index

Status: 247/289 deep equivalent, 289/289 parseable, 100% transliteration parity

This index tracks ALL remaining work across the interscript ecosystem. Each item links to its detailed TODO in the respective repo.

P0 — Blocks adoption

ISC Runtime Integration ✅ DONE

NodeAdapter bridges ISC document hash → Interscript::Node::Document. ISC files can now be used for actual transliteration.

Commit .isc files to maps repo

289 .isc files generated but not committed to interscript/maps.

E2E Tests for Website ✅ DONE

27/27 Playwright tests passing. Full-map validation: 37/37.

P1 — Ecosystem health

Fix Deep Equivalence Diffs

247/289 equivalent. 40 remain (codemod edge cases + description whitespace). Transliteration output is 100% identical — differences are metadata-only.

Fix ISC Spec Failures

73 specs written, ~50 pass. Remaining are syntax issues (system wrappers).

TS ISC Parser

Port ISC grammar to Peggy for direct .isc loading in browser/Node.

Full Parity Fixtures

Commit full-parity.json (7502 samples, 0 diffs) to the TS repo.

P2 — Quality

IS 1 Specification

Compile Metanorma document, publish to website.

Performance: Large CJK Maps

6 maps take 15-38s to parse (Parslet backtracking).

Ruby DSL Array Keys Bug ✅ DONE

Fixed: STANDARD_ARRAY_KEYS now stores results in @node.

Architecture Notes

Pipeline

.isc → Isc::Parser → DocumentBuilder → NodeAdapter → Node::Document → Interpreter
.imp → DSL.parse → Node::Document → Interpreter
                    ↓
              JsonIR Compiler → .json → interscript-ts → browser

ISC is now a first-class source format

With the NodeAdapter, .isc files can:

  • Be parsed (Parser)
  • Be built into documents (DocumentBuilder)
  • Be converted to Node objects (NodeAdapter)
  • Be used for transliteration (Interpreter)
  • Be compiled to JSON IR (JsonIR Compiler)

What's left for true parity

  1. Commit .isc to maps repo (mechanical)
  2. Update Interscript::Path to resolve .isc extension
  3. Port ISC parser to TypeScript (for browser-native .isc loading)
  4. Fix remaining 40 metadata edge cases (cosmetic)