Close the gaps an audit of courses, tasks, files and grades turned up

Every area — courses, rooms, boards, topics, tasks, files, quizzes, teams,
groups, submissions, grades — was checked for data the instance has and the
tools did not show.

Grades and feedback. A teacher's /homework page is a different page from a
student's: grade and comment live in the grading form, one block per
submission, so a teacher account reported every graded submission as having
neither. parseTeacherGrading reads the form, and list_submissions can now
include the written feedback and who handed the work in.

Names. /api/v1 is partly served: courses, users and classes survive in the
deployment's ingress table, and users/{id} is the only route from an id to a
name. Submitters, file creators and course teachers resolve through it, and
degrade to "not visible to this account" where a student may not read them.

Courses, rooms and classes. get_course adds the description, teachers,
member count and weekly timetable from /api/v1/courses. list_classes is new.
get_room reports what the account may do — allowedOperations is an object of
booleans, not the list it was typed as — and applicants and invitation links
where it may manage them.

Board and topic content. Link descriptions, image alt text, drawing and
video-conference titles, the ids behind external tools and H5P content (the
only thing resembling a quiz), and what a deleted element used to be. Topic
Etherpad pads are read like board pads, and htmlToText keeps table columns
apart and drops template indentation.

Files. A scan with no text layer falls back to the preview endpoint, whose
width and outputFormat are undocumented enums, so Claude gets a picture of
the page; list_files reports counts and sizes. Teams stay documented as
unreadable at any API version; their files come later.

What the crawl missed. Tasks attached to topics (18 of 60 on the live
account), each course's own file area, and — behind INDEX_PERSONAL_FILES —
personal files and submissions with their grade comments, so search and
what_changed cover grading. A submission hit points at get_task.

The local instance's preview profile gets an ImageMagick policy that allows
the coders its 7.1.2 build needs; the image's own denies them all.

110 tests.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

README.md

@@ -17,7 +17,7 @@ instance, not inferred from the upstream source.
 > *"Find the material about Verschlüsselung and explain the Caesar cipher worksheet."*
 > *"Summarise the routing lesson from the LF10 course."*
 
-Thirteen tools, all read-only:
+Twenty tools, all read-only:
 
 | | |
 |---|---|
@@ -36,6 +36,9 @@ Thirteen tools, all read-only:
 | `refresh_index` | re-read Schulcloud now, per course or in full |
 | `what_changed` | what appeared, changed or vanished since a date |
 | `index_status` | how fresh the index is |
+| `list_rooms` | rooms ("Räume"), which are a separate space from courses |
+| `get_room` | one room: its boards, members and what you may do there |
+| `list_classes` | classes ("Klassen") with their teachers, and group membership |
 | `list_news` | school and course announcements |
 | `api_get` | GET-only escape hatch for uncovered API surface |