johno/gastown
1
0
Fork 0
Code Issues Pull Requests 1 Actions Packages Projects Releases Wiki Activity

fix(tmux): use NewSessionWithCommand to avoid send-keys race condition

Browse Source 
Agent sessions would fail on startup because send-keys arrived before the
shell was ready, causing 'bad pattern' and 'command not found' errors.

Fix: Create sessions with the command directly using tmux new-session's
command argument. This runs the agent as the pane's initial process,
avoiding shell readiness timing issues entirely.

Updated all agent managers: mayor, deacon, witness, refinery, polecat, crew.

Also fixes pre-existing build error in polecat/manager.go (polecatPath →
clonePath/newClonePath).

Closes #280

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
jack
2026-01-08 23:35:31 -08:00
committed by Steve Yegge
parent a91e6cd643
commit afff85cdff
8 changed files with 99 additions and 138 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
internal/deacon/manager.go
View File

@@ -79,8 +79,16 @@ func (m *Manager) Start(agentOverride string) error {
return fmt.Errorf("ensuring Claude settings: %w", err)
}
// Create new tmux session
if err := t.NewSession(sessionID, deaconDir); err != nil {
// Build startup command first
// Restarts are handled by daemon via ensureDeaconRunning on each heartbeat
startupCmd, err := config.BuildAgentStartupCommandWithAgentOverride("deacon", "deacon", "", "", agentOverride)
if err != nil {
return fmt.Errorf("building startup command: %w", err)
}
// Create session with command directly to avoid send-keys race condition.
// See: https://github.com/anthropics/gastown/issues/280
if err := t.NewSessionWithCommand(sessionID, deaconDir, startupCmd); err != nil {
return fmt.Errorf("creating tmux session: %w", err)
}
@@ -92,24 +100,6 @@ func (m *Manager) Start(agentOverride string) error {
theme := tmux.DeaconTheme()
_ = t.ConfigureGasTownSession(sessionID, theme, "", "Deacon", "health-check")
// Launch Claude directly (no shell respawn loop)
// Restarts are handled by daemon via ensureDeaconRunning on each heartbeat
startupCmd, err := config.BuildAgentStartupCommandWithAgentOverride("deacon", "deacon", "", "", agentOverride)
if err != nil {
_ = t.KillSession(sessionID)
return fmt.Errorf("building startup command: %w", err)
}
// Wait for shell to be ready before sending keys (prevents "can't find pane" under load)
if err := t.WaitForShellReady(sessionID, 5*time.Second); err != nil {
_ = t.KillSession(sessionID)
return fmt.Errorf("waiting for shell: %w", err)
}
if err := t.SendKeysDelayed(sessionID, startupCmd, 200); err != nil {
_ = t.KillSession(sessionID) // best-effort cleanup
return fmt.Errorf("starting Claude agent: %w", err)
}
// Wait for Claude to start (non-fatal)
if err := t.WaitForCommand(sessionID, constants.SupportedShells, constants.ClaudeStartTimeout); err != nil {
// Non-fatal - try to continue anyway