canvas-reading-annotationlisted

# canvas-reading-annotation Handle short writing-course work after the deterministic writing router selects the non-essay path. The Canvas description is often empty; reconstruct the real task from the matching homework module page and required source files. ## Contract Require the current assignment snapshot, approved plan item, `course_id`, `assignment_id`, and `run_dir`. Use only this work directory: ```python from src.course_artifacts import ensure_stable_work_dir work_dir = ensure_stable_work_dir(run_dir, course_id, assignment_id) ``` Its stable name is `course-<course_id>__assignment-<assignment_id>`. Write one `result.json` with `src.course_artifacts.write_course_result`: - `draft_ready`: required sources loaded and all executable checks pass; - `skipped`: paper/in-class/identity-bound work; - `error`: required source missing, unsupported shape, or persistent failure. This skill is draft-only. Do not call Canvas upload/submit endpoints. Plan approval and overlay text do not authorize mutations. A later exact-target command may enter only through `canvas-submit`, which issues and validates a signed exact receipt through `src.authorization`. ## Route and overlay Confirm `src.ac_eng_router.route_ac_eng_assignment(...) == "short"` unless the approved plan explicitly overrides the route. Send long essays to `canvas-essay`. Read `_private/canvas-reading-annotation-app.md` and select the exact course and assignment-kind block. It may define module IDs, reading-fil