- New eslint.config.js (flat, ESLint 9) declaring 9 element types:
the seven Phase-1 firewall directories (sim, render, ui, save,
content, audio, store) plus the template's app + game.
- One rule, severity error: sim cannot import from render or ui (CORE-10).
- Default posture allow — Phase 1 enforces ONE rule, not closed-by-default.
- src/sim/__test_violation__/ excluded from default lint glob; the rule's
end-to-end correctness is proven by Task 2's Vitest test, not by 'lint
exits 0 on clean code'.
- Added typescript-eslint as devDep (parser only — no rule sets) so
ESLint can parse .ts/.tsx (Espree default cannot). Documented as a
Plan 02 deviation in 01-02-SUMMARY.md (Rule 3 — Blocking).
Verifies green on the clean codebase: 0 errors, 0 warnings via
'npm run lint'. Stderr notices from boundaries plugin about deprecated
rule name (element-types vs dependencies in v6) and legacy selector
syntax are informational only — they don't count as ESLint warnings.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
