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fix(tmux): close panes on their owning server - #171
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Merge Risk: ⚪ Minimal · up to
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| Check name | Status | Explanation |
|---|---|---|
| Description check |  |
The description clearly explains the tmux socket capture, owning-server selection, reproduction case, changed files, and verification results. |
| Title check | |
The title clearly and concisely identifies the main change: closing tmux panes on their owning server. |
| Docstring Coverage | |
Docstring coverage is 86.96% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 23 functions across 3 files. |
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| Out of Scope Changes check | |
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Actionable comments posted: 2
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Inline comments:
Review comments at @src/instance_binding.rs:
- Line 204: Update capture_and_store_launch_context to retain the previously
saved env.TMUX value when a later capture lacks TMUX, while still accepting a
newly captured socket when present. Preserve the existing pane ID and ensure the
saved nested env retains the original owner socket for subsequent close
operations.
Review comments at @src/pidtrack.rs:
- Line 83: Persist the owning tmux socket path in the orphan record and copy it
into the TerminalInfo construction using the default TerminalInfo update near
TerminalInfo::default(). Ensure close_terminal_pane receives the owner socket so
its close command includes the correct -S value and cannot target another tmux
server’s pane.
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src/instance_binding.rssrc/pidtrack.rssrc/terminal.rs
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| zellij_session_name: self.zellij_session_name.clone(), | ||
| herdr_socket_path: self.herdr_socket_path.clone(), | ||
| wezterm_unix_socket: self.wezterm_unix_socket.clone(), | ||
| ..crate::terminal::TerminalInfo::default() |
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When hcom stop leaves an interactive PTY alive, hooks/common.rs resolves its terminal metadata but PidRecord/PidEntry and OrphanProcess retain every server identifier except the new tmux_socket_path; this default therefore reconstructs TerminalInfo with an empty socket. The orphan kill paths in commands/kill.rs then skip the new socket splice, so killing that orphan from another tmux server can still send kill-pane to the caller's same-numbered pane. Carry the socket through pidtrack and restore it here.
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 [Medium impact] The changes affect tmux pane closing and split launches. Not ready to merge because missing or inherited Findings
SummaryThe PR saves tmux ownership with launch context and stopped-process records, then checks the saved server PID before closing a pane.
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| "WT_SESSION", | ||
| "ConEmuHWND", | ||
| "TMUX_PANE", | ||
| "TMUX", |
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Capturing TMUX only in the start hook leaves startup kills unfixed. Proxy::spawn saves the PID and pane ID before the tool runs its start hook, and hcom kill accepts those records. If startup is slow or stuck, killing the instance from another server still runs tmux kill-pane without -S and can close that server's matching pane.
Capture the socket in build_early_launch_context too.
Knowledge Base Used:
| lc_env | ||
| .and_then(|e| e.get("TMUX").and_then(|v| v.as_str())) | ||
| .and_then(|v| v.split(',').next()) |
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If a custom preset opens a pane on server B from server A, the new-pane runner can replace B's fresh TMUX with A's saved value. The runner excludes TMUX_PANE from the parent's environment, but not TMUX. This pairs B's pane ID with A's socket, so the close command forces -S to A even when kill runs from B.
Exclude TMUX from the environment replayed inside new panes, or capture the socket directly from the owning server.
Knowledge Base Used:
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only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.
Inline comments:
Review comments at @src/pidtrack.rs:
- Around line 85-100: Preserve the resolved tmux socket on OrphanProcess by
adding a tmux_socket_path field and copying entry.tmux_socket_path when
get_orphan_processes constructs each orphan. Update OrphanProcess::from to use
self.tmux_socket_path.clone() instead of rereading hcom_dir, and update all test
struct literals accordingly; keep the existing scan-time database fallback in
get_orphan_processes.
Review comments at @src/terminal.rs:
- Around line 108-111: Update has_tmux_server_selector to scan only tmux global
options before the subcommand, starting after the command name; stop at the
first non-option, detect -S and -L selectors only in that region, and skip the
following value for -c, -f, and -T so later global selectors remain detectable.
Add coverage for subcommand options and selectors following a value-taking
global option.
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src/instance_binding.rssrc/pidtrack.rssrc/terminal.rs
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| } else if let Some(env) = ctx.get_mut("env").and_then(|v| v.as_object_mut()) { | ||
| // This process has no previously verified socket, so a | ||
| // later hook's TMUX may belong to its caller. Refuse to | ||
| // infer a pane owner from that value. | ||
| env.remove("TMUX"); |
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When the launcher persists process_id before the first SessionStart hook (for example, launch_pty does so in launcher.rs:1424-1430), the old row has the current process ID but no TMUX metadata. The hook then enters this same-ID/old_socket == None branch and deletes the valid TMUX value it just captured from the pane; subsequent hooks repeat the deletion, so the new close guard sees an empty socket and refuses to close the tmux pane. Store this first socket for tmux launches (or capture it in the early launch context) instead of treating it as a caller value.
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| tmux_socket_path: read_raw(&crate::paths::hcom_dir()) | ||
| .get(&self.pid.to_string()) | ||
| .map(|entry| entry.tmux_socket_path.clone()) | ||
| .filter(|socket| !socket.is_empty()) |
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When hcom start --orphan or claim_orphans reattaches a stopped PTY, attach_runtime_state can copy only fields on OrphanProcess, after which pidtrack.rs:504 or commands/start.rs:303 removes the pidfile entry. This implementation exposes the socket only through a lazy lookup in terminal_info() and never places it on OrphanProcess, so the recovered row's launch_context has no socket and a subsequent kill leaves the tmux pane open. Carry the field through From<PidEntry> and restore it during attachment.
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Record the pane's TMUX and close through it, and skip the close unless that server still has the pane under the same server pid (pane ids restart at %0 when a server restarts on the same socket). The check times out so a hung server can't block the kill. Also run the tmux-split script via bash, like the tmux preset.
|
thanks for the pr. I made some edits |
| } else if is_tmux_argv(&argv) && !tmux.is_empty() { | ||
| if !tmux_pane_on_server(&argv[0], tmux, effective_pane_id) { | ||
| return failed_without_command(); | ||
| } | ||
| vec![("TMUX", tmux.as_str())] | ||
| } else { | ||
| Vec::new() |
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Instances saved before this change lack env.TMUX. Their empty tmux now skips the server check and runs the close command with the caller’s environment. If both servers contain %0, killing an older instance can close the caller’s unrelated pane.
Refuse to close without a saved owner unless the close command explicitly selects a server.
Knowledge Base Used: Runtime environment and process setup
| if !tmux_pane_on_server(&argv[0], tmux, effective_pane_id) { | ||
| return failed_without_command(); |
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If the caller cannot reach the tmux socket, the query fails and returns failed_without_command(), which has no retry command. Pane cleanup is skipped, but hcom kill reports success after signalling the process. The user gets neither a warning nor a command to retry.
Keep an error or retry command for query failures instead of treating them like a confirmed stale owner.
Knowledge Base Used: Command workflows
Brings aannoo#164 (Codex approval latch clears on a negative scrape timer), aannoo#165 (Claude leftover <hcom> wake submitted with Enter), aannoo#163/aannoo#169 (Grok mail recovery and steer ack) and aannoo#171 (tmux panes closed on their owning server). Fork deltas in conflicted files: - src/pty/screen.rs: re-applied 362b479 Claude suggestion heuristic (is_claude_placeholder_or_suggestion) inside upstream's new ClaudeInputBox return; fork and upstream tests both kept. - src/pidtrack.rs: fork-only test_recovered_orphan_keeps_catalog_agent_name gets upstream's new tmux field. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Hcom-Agent: hcom_dev
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Summary
tmux -S <socket>to pane-close commands when the template does not already select a server, so repeated pane IDs resolve in the server that owns the instance.Reproduction
%0.hcom killfrom server A for an instance recorded in server B.%0pane and leaves B's pane open. With this change, A remains alive and B's target pane closes.Changed files
src/instance_binding.rs— retainTMUXin the launch environment snapshot.src/pidtrack.rs— default the added terminal metadata for orphan records.src/terminal.rs— resolve the owning socket and add it to tmux close commands, with focused tests.Verification
cargo fmt --check— passed.cargo test --bin hcom terminal::tests::— 109 passed.instance_binding::tests::test_capture_and_store_launch_context_preserves_terminal_metadata— passed.hcom killend-to-end test with duplicate%0pane IDs — caller server remained alive; target server closed.