APIClient (77 -> 125 tests, coverage 92.22%): POST /auth probe with the four
distinct outcomes from the frozen contract, Cookie/Accept landed at the same
single header choke point that already enforces Origin-iff-G, plus the whole
project-ops surface the server has had since late July and iOS consumed none of:
/projects/log, /projects/pr, /projects/worktree/state, git stage/commit/push/
fetch, worktree create/remove/prune, GET /sessions, follow-up queue.
HostRegistry (30 -> 73 tests, 88.12% -> 92.49%): per-host token in the Keychain
under the existing SecItemShim conventions (device-only, never synchronizable),
charset/length validated at the boundary, old token-less records still decode.
SessionCore (93 -> 108 tests, 96.74%): the WS upgrade carries the cookie from
the same point that writes Origin, and a 401 handshake is a terminal
.unauthorized -- never entering the backoff loop, since retrying one wrong
shared token is a brute-force generator against the server's 10/min limiter.
T-iOS-1: ios/ XcodeGen project (iOS 17, Swift 6 strict concurrency, ATS per PLAN §5.2), 5 SPM package shells, CI skeleton
T-iOS-2: Origin spike vs real server — URLSessionWebSocketTask custom Origin CONFIRMED (no Starscream); 16MiB replay + EMSGSIZE(40) errno correction written back to plan
T-iOS-3: WireProtocol frozen contract, 59 tests, 100% line coverage, cross-impl vectors vs src/protocol.ts via tsx
T-iOS-4: FakeTransport/FakeClock/FakeHTTPTransport doubles
Verify: independent agent re-ran all acceptance — 6/6 PASS
