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fix(tmux): wait for shell ready before sending keys (#264)

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Add WaitForShellReady call before SendKeys in all agent managers
(deacon, mayor, witness, refinery). This prevents intermittent
"can't find pane" errors that occur when the tmux session is
created but the shell isn't ready to receive input yet.

The issue manifests under load (e.g., during `gt up` when multiple
agents start in sequence) where the 200ms delay in SendKeysDelayed
isn't sufficient for the pane to be fully initialized.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Julian Knutsen
2026-01-07 20:49:25 -08:00
committed by GitHub
parent a9ed342be6
commit 28a9de64d5
6 changed files with 30 additions and 0 deletions
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5
internal/boot/boot.go
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@@ -197,6 +197,11 @@ func (b *Boot) spawnTmux() error {
// Launch Claude with environment exported inline and initial triage prompt
// The "gt boot triage" prompt tells Boot to immediately start triage (GUPP principle)
startCmd := config.BuildAgentStartupCommand("boot", "deacon-boot", "", "gt boot triage")
// Wait for shell to be ready before sending keys (prevents "can't find pane" under load)
if err := b.tmux.WaitForShellReady(SessionName, 5*time.Second); err != nil {
_ = b.tmux.KillSession(SessionName)
return fmt.Errorf("waiting for shell: %w", err)
}
if err := b.tmux.SendKeys(SessionName, startCmd); err != nil {
return fmt.Errorf("sending startup command: %w", err)
}