v0.2.2's 2-poll confirmation was insufficient because Anthropic 500/503
errors are printed into Claude Code's conversation transcript and stay
visible in every tmux capture until the user scrolls. A persistent
server error would confirm on the second poll and still trigger a swap.
Root cause: the pattern "rate limit" (bare substring) matched any 500
payload that happened to mention rate limits in its error text. Real
HTTP 429s from Anthropic are typed as "rate_limit_error" in the error
payload — and that's the signature we should actually key on.
- Remove "rate limit" from quotaPatterns (too generic — matches transcripts).
- Add "rate_limit_error" (Anthropic's typed 429 error) and "5-hour limit".
- Add serverErrorPatterns veto: "api_error", "overloaded_error",
"internal server error", "api error: 5". When any is present in the
pane, isQuotaExhausted returns false even if a quota pattern matched.
- 4 new subtests covering the veto paths + sanity that real 429s pass.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Anthropic HTTP 500 errors surface in the TUI with payloads containing
"rate limit" text, which the monitor was matching against quotaPatterns
and treating as a real 429 quota hit. With no cooldown and no
confirmation, a burst of 500s produced sub-minute ping-pong swaps that
tore down user sessions.
Two-layer fix:
- quota.reactivate_cooldown (already in config, 5m) now gates the
monitor too — not just the dispatcher. A completed swap suppresses
further detection for the cooldown window.
- A hit with no parseable reset time is treated as suspected only on
the first poll; a second consecutive poll is required before
emitting SwapRequested. Legitimate 429s with "resets in ..." still
swap instantly on the first detection.
Adds state.RecordSwap / LastSwapInfo for the cooldown, and a
forensic log line on every detection: trigger_session, matched
pattern, 120-char pane snippet.
Tests cover: instant swap with reset, 2-poll confirmation without
reset, and suspected-state reset on recovery.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
