chore: Add ReScript enforcement + conversion notice (RSR policy)

Author: Jonathan D.A. Jewell

.claude/CLAUDE.md

@@ -26,3 +26,14 @@ This repo currently uses npm but needs to be converted to Deno.
 - **REQUIRED**: Deno for JavaScript/TypeScript
 - **FORBIDDEN**: npm, npx, node_modules (after conversion)
 - **FALLBACK**: Bun only if Deno is impossible
+
+## Language Policy (RSR)
+
+### ⚠️ CONVERSION IN PROGRESS: TS/JS → ReScript
+
+- **REQUIRED**: ReScript for all NEW code
+- **FORBIDDEN**: New TypeScript/JavaScript files
+- **TODO**: Convert existing TS/JS to ReScript
+- **ALLOWED**: Generated .res.js files
+
+See TS_CONVERSION_NEEDED.md for migration status.

.github/workflows/ts-blocker.yml

@@ -0,0 +1,19 @@
+name: TypeScript/JavaScript Blocker
+on: [push, pull_request]
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Block new TypeScript/JavaScript
+        run: |
+          NEW_TS=$(git diff --name-only --diff-filter=A HEAD~1 2>/dev/null | grep -E '\.(ts|tsx)$' | grep -v '\.gen\.' || true)
+          NEW_JS=$(git diff --name-only --diff-filter=A HEAD~1 2>/dev/null | grep -E '\.(js|jsx)$' | grep -v '\.res\.js$' | grep -v '\.gen\.' | grep -v 'node_modules' || true)
+          
+          if [ -n "$NEW_TS" ] || [ -n "$NEW_JS" ]; then
+            echo "❌ New TS/JS files detected. Use ReScript instead."
+            [ -n "$NEW_TS" ] && echo "$NEW_TS"
+            [ -n "$NEW_JS" ] && echo "$NEW_JS"
+            exit 1
+          fi
+          echo "✅ ReScript policy enforced"

TS_CONVERSION_NEEDED.md

@@ -0,0 +1,14 @@
+# TypeScript/JavaScript → ReScript Conversion (Partial)
+
+This repo has some ReScript but still contains TS/JS that needs conversion.
+
+## Remaining Work
+1. Find all `.ts`/`.tsx`/`.js`/`.jsx` files (excluding `.res.js`)
+2. Create ReScript equivalents
+3. Migrate logic and update imports
+4. Delete original TS/JS files
+
+## Policy
+- No NEW TypeScript/JavaScript allowed
+- CI will block new TS/JS files
+- Existing TS/JS should be migrated over time