Sync from GitHub via hub-sync

Sync from GitHub via hub-sync

Refine curriculum summary rendering

Wire summary pages into previews

update tests and refine app

Add editor version save and restore

Allow chat to propose course drafts

Split API routes and add backend health checks

Use list lookups for optional rows

Handle chat and lookup failures safely

Harden live editor chat streaming

Add modular agent tool registry

tests + textbook parsing bug fix + ci for tests + formatting

initial commit - agent with attachment

initial diff engine for agentic changes

Harden refinement and add Sentry monitoring

Remove deterministic tool inference

Refine curriculum preview generation

test ai pipeline

cleanup for rework

initial commit