Backend simplification:
- The server now loads ONE pool JSON from $QUIZ_POOL_PATH at startup and
upserts a single canonical session. The session id comes from the pool
JSON's optional "session_id" field, falling back to $QUIZ_SESSION_ID.
- The multi-quiz / multi-session CRUD API is gone:
DELETED GET/POST /admin/api/quizzes
DELETED POST /admin/api/quizzes/upload
DELETED GET/POST /admin/api/sessions
DELETED GET /admin/login (HTML stub)
DELETED GET /admin/api/sessions/{sid}/csv (replaced by /admin/api/csv)
Replaced with a single-session control surface:
GET /admin/ — serves admin.html unconditionally
GET /admin/api/state — admin-gated; pool meta + state + QR + join URL
POST /admin/api/reset — admin-gated; wipe submissions + back to lobby
POST /admin/logout — clear admin cookie
GET /admin/api/csv — single-session results
WS /ws/instructor/{sid} — kept; new commands "next" + "reset"
- Instructor "Next" button is now a single state-driving command
(RoomManager.advance_to_next): from lobby it opens Q0; from question_open
it closes the current Q and opens the next; from question_closed it
opens the next; if past the last question it ends the session.
- New RoomManager.reset wipes submissions, participants, and per-question
state, then broadcasts a clean lobby.
- Student GET / now redirects to /?sid=<canonical> when no sid is given,
so the QR / share URL is fully deterministic.
Frontend rewrite (functional baseline; visual polish to follow):
- /admin/ is now a single SPA: GET /admin/api/state decides login form
vs dashboard. No separate /admin/login URL bar.
- Admin dashboard is state-driven with one primary action per state.
QR code, join URL, and live participant list are always visible on the
left so the operator can leave the page on a projector.
- Student answer buttons are big and tappable; reveal screen highlights
correct/wrong choice + shows score, total, and rank.
- Static admin/student SPAs share a CSS palette with light/dark support.
Tests rewritten around the single canonical session id.
The auto-bootstrapped session lets each test fixture skip the old
quiz/session creation dance. 39/39 tests pass.
Cleanup:
- Deleted CODEX_PROMPT.md, IMPLEMENTATION_REPORT.md, NOTES.md, SPEC.md,
static/observer.html (obsolete codex-build artifacts and the unused
observer view).
- .gitignore now blocks /pool.json (the runtime file the operator drops
on the server) and the leftover .codex_done / codex_run.log / etc.
- bootstrap.sh seeds /opt/quiz/pool.json from examples/pool_example.json
on first deploy so a fresh box reaches a usable state without manual
intervention; .env now includes QUIZ_POOL_PATH.
Two suites under tests/stress/, plus a tmux-friendly run_loop.sh
runner. Both boot a fresh uvicorn on an isolated DB per cycle and
log JSON line summaries to runs/.
api_stress.mjs covers WS-level scenarios that the existing pytest
suite does not exercise: 20-student happy path, late joiners with
correct remaining_ms, mid-question disconnect, browser-sleep + wake
to a different question_idx, cookie tampering and cross-session
cookie reuse, duplicate student_id, bad submit (out-of-order, wrong
idx, resubmit no-op), close-boundary race with auto-close, malformed
JSON fuzz, and flaky reconnect.
ui_stress.mjs drives the same flows in a real Chromium context via
playwright: happy UI, sleep/wake by closing+reopening a context with
the persisted cookie, document.cookie tampering attempt, and two
browser contexts joining with the same student_id.
Findings will be summarised in runs/summary.jsonl over time. One known
issue surfaces from the fuzz scenario: app/room.py student_ws's
receive_json call propagates JSONDecodeError out of the only
try/except (which catches WebSocketDisconnect), killing that client's
WS handler. Other clients are unaffected.
