Check compiler errors

Trigger

Compile or type-check failures are blocking local validation or CI.

Workflow

1. Run the repo's compile and type-check commands.
2. Summarize errors by file and type.
3. Fix the highest-confidence issues first.
4. Re-run checks until clean or blocked.

Output

• Current compile and type-check status
• Error summary grouped by file and category
• Fixes applied and remaining blockers