Covers the user-visible flow that Phase 1-5b shipped (RFC #2891):
register a poll-mode workspace, POST a multi-file /chat/uploads, verify
the activity feed shows one chat_upload_receive row per file, fetch the
bytes via /pending-uploads/:fid/content, ack each row, and confirm a
post-ack fetch returns 404. Also pins cross-workspace bleed protection
(workspace B's bearer on A's URL → 401, B's URL with A's file_id →
404) and the file_id-UUID-parse 400 path.
23 assertions, all green against a local platform (Postgres+Redis+
platform-server stack matches the e2e-api.yml CI recipe verbatim).
Why a new script instead of extending test_poll_mode_e2e.sh: that
script tests A2A short-circuit + since_id cursor semantics; this one
tests the chat-upload path. They share zero handler code on the
platform side and would dilute each other's failure messages if
combined.
Why not the bearerless-401 strict-mode assertion: the platform's
wsauth fail-opens for bearerless requests when MOLECULE_ENV=development
(see middleware/devmode.go). The CI workflow doesn't set that var, but
some local-dev .env files do — the assertion would flap by environment
without testing the poll-mode upload contract. The middleware's own
unit tests cover strict-mode 401.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>