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## Summary Fixes two CI flakes from the 21–28 Oct 2026 audit, both in test code with no product change: - The relay E2E helper `collect_until_eose` now drops repeat copies of an event id. - Two Windows shell tests drop a 5 s cap that a cold Git Bash start can exceed. This is one of seven PRs split out of the `flakey-tests` branch (siblings below). ### Related issue None found for these two. The buzz-terminal `passwd_shell()` `getpwuid` race (`env_fence_tests::resolve_shell_falls_through_to_passwd_not_the_default`, run 38590095289) is left to open PR #7687, which already replaces `getpwuid`. #8636 and #7976 edit `buzz-test-client/src/lib.rs`, and #7607 and #7915 edit `buzz-dev-mcp/src/shell.rs`, but none of them changes `collect_until_eose` or these timeouts. ### Flaky tests fixed | Test | Failing runs | Cause | Change | |---|---|---|---| | Relay E2E `e2e_project::test_project_tombstone_deletes_coordinate_and_spares_members` (e2e_project.rs:338, "left: 2 right: 1") | 40408678412#1, job 121879630394 (PR #8620, schema-only) | The EVENT handler sends OK, then fans out in a spawned task. `handle_req` registers the live subscription before its history query, and `req.rs`'s `seen_ids` dedups history rows only. If fan-out runs after the REQ is registered, the event arrives once live and once from history, both before EOSE, and `collect_until_eose` kept every frame. | `collect_until_eose` keeps the first copy of each event id, as production clients do. Its doc comment says a test of the relay's own dedup must read frames with `recv_event`. A new unit test, `collect_until_eose_keeps_one_copy_of_each_event_id`, uses a fake relay that sends the duplicate. | | Windows `buzz-dev-mcp` `shell::tests::basic_echo` (shell.rs:1026, exit 124) | 39675698081#1, job 119485363399 (green on re-run) | 124 is the shell tool's own timeout exit code. `basic_echo` capped the shell at 5 s, and it is one of the first tests in the process to start Git Bash, which can take longer than 5 s on a cold runner. | `timeout_ms: None` (the production 120 s default) in `basic_echo` and in `workdir_is_honored`, which has the same exposure. `timeout_fires` still covers timeouts. | Pre-check: no e2e test relies on the relay's own history dedup. Every exact-count assertion uses a single filter. The NIP-33 "only newest remains" assertions would see a failed replacement as two different ids, and this dedup keeps both. Local evidence is from the original `flakey-tests` commit (fc4518d39): - The new unit test: FAIL before, PASS after. - 13 of the 14 e2e files that call the helper, plus `e2e_thread_roots`, against an isolated local relay. All pass, except `e2e_relay` `test_unarchive_emits_member_added_notification`. That test fails by itself 3/5 with the original helper too, and CI's Relay E2E lane doesn't select it. - The Windows failure can't be reproduced on macOS. The Windows Rust lane is the check. Follow-up (out of scope): make the relay deliver each event id at most once per subscription, keeping the live/history overlap. ### Verification This branch was pushed without local re-verification, by the user's choice: local test runs were overloading the machine and failing for that reason. **Hosted CI is the check.** It was pushed with `git push --no-verify`, because the pre-push hook runs clippy and unit tests. - Both files are byte-identical to their final versions on `flakey-tests` (67185df6a). - Checked for this PR: `git diff --check`, `rustfmt --check`, and a conflict-free merge with all six siblings onto `main`. ### Readiness Test-only change. AGENTS.md's readiness steps (agent review, then human confirmation) are still outstanding, so `buzz-review-completed` is not set. ### Merge order Independent of the other six. It merges cleanly onto `main`, and with every sibling, in any order. ### Sibling PRs Split from `flakey-tests` (one PR per area): #8676 (PostgreSQL lease + lane), #8678 (mobile), #8679 (Tauri apt cache + Windows Rust cap), #8680 (desktop product races), #8681 (desktop E2E state gates), #8682 (desktop E2E composer + row actions). 🤖 Generated with [Claude Code](https://claude.com/claude-code) Signed-off-by: Matt Toohey <contact@matttoohey.com> Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>