End-to-end coverage for the canvas-chat unblocker. Exercises every
moving part of the #2339 stack against a real platform instance:
Phase 1 — register a workspace as delivery_mode=poll WITHOUT a URL;
verify the response carries delivery_mode=poll.
Phase 2 — invalid delivery_mode rejected with 400 (typo defense).
Phase 3 — POST A2A to the poll-mode workspace; verify proxyA2ARequest
short-circuits and returns 200 {status:queued, delivery_mode:poll,
method:message/send} without ever resolving an agent URL.
Phase 4 — verify the queued message appears in /activity?type=a2a_receive
with the right method + payload (the polling agent reads from here).
Phase 5 — since_id cursor returns ASC-ordered rows STRICTLY AFTER the
cursor; the cursor row itself must NOT be replayed. Sends two
follow-up messages and asserts ordering: rows[0] is the older new
event, rows[-1] is the newer.
Phase 6 — unknown / pruned cursor returns 410 Gone with an explanation.
Phase 7 — cross-workspace cursor isolation: a UUID belonging to one
workspace cannot be used to peek at another workspace's feed (returns
410, same as pruned, no info leak).
Idempotent: per-run unique workspace ids (date+pid). Trap-based cleanup
deletes the test rows on exit; no e2e_cleanup_all_workspaces call (see
feedback_never_run_cluster_cleanup_tests_on_live_platform.md).
Wired into .github/workflows/e2e-api.yml so it runs on every PR that
touches workspace-server/, tests/e2e/, or the workflow file itself —
same gate as the existing test_a2a_e2e + test_notify_attachments suites.
Stacked on #2354 (PR 3: since_id cursor).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
a495b86a06