* fix(runtime): classify tui-idle from the visible screen only
The adopted-PTY tui-idle probe added in #15569 read the provider snapshot as
`scrollbackAnsi + data`, and the Codex readiness classifier matches the startup
banner. For a daemon-hosted adopted worker — where the retained tail stays empty
forever — every wait re-probed and could resolve `satisfied: true` off banner
history while Codex was actively working, turning a loud timeout into a silent
false ready.
- probe now requests and parses the visible grid, never scrollback
- retirement of a timed-out provider acquisition is checked before the
re-acquire branch, so a wider row request can no longer resurrect a hung
provider
- probe builds its result before clearing the poll interval, so a stale handle
cannot leave the waiter with neither poll nor probe
Fixture follow-ups from the same review:
- resume legs pin the captured `launchConfig.agentCommand` to the fake instead
of bare `codex`, which resolved the machine's real Codex off PATH
- the command override is quoted for the Windows shell the runtime will actually
use, and specs pin that shell alongside the override
- fake agents acknowledge a bare submit after a short grace, so an unbracketed
delivery path fails with a diagnosable ACK instead of a suite timeout
Refs STA-4907, STA-4885
* test: assert tui-idle probes serialize visible grid only
- Verify idle timeout probes exclude scrollback from serialization
- Add test case for Git Bash shell path quoting with apostrophes
- Simplify verbose test helper comments
* test: improve fake agent paste protocol validation
Refactor paste end detection to properly track both begin and end markers,
validate bracketed paste protocol (RFC 2544) through chronological event
sequencing, and emit correct error messages for protocol violations. This
ensures reliable detection of when pastes complete even when delivered
across multiple chunks, and correctly distinguishes between bracketed and
unbracketed paste modes.
* fix(runtime): reject provider snapshots when live output advances
Provider snapshots become stale when live output is received after the
snapshot is requested. Reject snapshots where the current output sequence
exceeds the snapshot sequence, preventing callers from consuming outdated
terminal state. Add tests verifying stale frame rejection.
Jinjing
e50cc309c3