Add task sidebar workflow

internal/app/launch.go

@@ -24,6 +24,12 @@ type Launcher struct {
 	cols, rows uint16
 }
 
+type LaunchContext struct {
+	ParentID string
+	TaskID   string
+	WorkDir  string
+}
+
 func NewLauncher(sess *Session, mcpSocket string, cols, rows uint16) *Launcher {
 	bin, err := os.Executable()
 	if err != nil {
@@ -47,7 +53,7 @@ func (l *Launcher) size() (uint16, uint16) {
 // LaunchAgent spawns the agent preset, applies the preset's MCP
 // injection, waits for the ready signal, and types initial_prompt into
 // the PTY. SPEC §7 spawn_agent, §8 conversation protocol.
-func (l *Launcher) LaunchAgent(p *preset.Preset, displayName, initialPrompt, parentID string) (*Child, error) {
+func (l *Launcher) LaunchAgent(p *preset.Preset, displayName, initialPrompt string, ctx LaunchContext) (*Child, error) {
 	if p.Kind != preset.KindAgent {
 		return nil, fmt.Errorf("launch: %q is not an agent preset", p.Name)
 	}
@@ -131,7 +137,9 @@ func (l *Launcher) LaunchAgent(p *preset.Preset, displayName, initialPrompt, par
 		Argv:          argv,
 		Env:           env,
 		Name:          displayName,
-		ParentID:      parentID,
+		ParentID:      ctx.ParentID,
+		TaskID:        ctx.TaskID,
+		WorkDir:       firstNonEmpty(ctx.WorkDir, p.WorkingDir),
 		PresetRef:     p.Name,
 		Identity:      identity,
 		CleanupPaths:  cleanupPaths,
@@ -163,7 +171,7 @@ func (l *Launcher) LaunchAgent(p *preset.Preset, displayName, initialPrompt, par
 // LaunchCommandPreset spawns a process preset as a SPEC §7 command
 // entry. No MCP injection; just argv. The entry is session-persistent
 // (survives PTY exit so it can be Restart'd).
-func (l *Launcher) LaunchCommandPreset(p *preset.Preset, displayName, parentID string) (*Child, error) {
+func (l *Launcher) LaunchCommandPreset(p *preset.Preset, displayName string, ctx LaunchContext) (*Child, error) {
 	if p.Kind != preset.KindCommand {
 		return nil, fmt.Errorf("launch: %q is not a command preset", p.Name)
 	}
@@ -177,8 +185,9 @@ func (l *Launcher) LaunchCommandPreset(p *preset.Preset, displayName, parentID s
 		Argv:          p.ResolvedArgv(),
 		Env:           env,
 		Name:          displayName,
-		ParentID:      parentID,
-		WorkDir:       p.WorkingDir,
+		ParentID:      ctx.ParentID,
+		TaskID:        ctx.TaskID,
+		WorkDir:       firstNonEmpty(ctx.WorkDir, p.WorkingDir),
 		PresetRef:     p.Name,
 		IdleDetection: resolveIdleDetection(p.IdleDetection),
 	}, cols, rows)
@@ -191,7 +200,7 @@ func (l *Launcher) LaunchCommandPreset(p *preset.Preset, displayName, parentID s
 // LaunchCommandArgv spawns a freeform-argv command entry. Trust gating
 // (SPEC §7) lives one level up in toolHost — by the time we get here
 // trust is settled (freeform argv is implicitly trusted).
-func (l *Launcher) LaunchCommandArgv(argv []string, displayName, parentID, workDir string, env []string, shell bool) (*Child, error) {
+func (l *Launcher) LaunchCommandArgv(argv []string, displayName string, ctx LaunchContext, env []string, shell bool) (*Child, error) {
 	if shell && len(argv) > 0 {
 		argv = []string{"sh", "-lc", strings.Join(argv, " ")}
 	}
@@ -204,8 +213,9 @@ func (l *Launcher) LaunchCommandArgv(argv []string, displayName, parentID, workD
 		Argv:     argv,
 		Env:      env,
 		Name:     displayName,
-		ParentID: parentID,
-		WorkDir:  workDir,
+		ParentID: ctx.ParentID,
+		TaskID:   ctx.TaskID,
+		WorkDir:  ctx.WorkDir,
 	}, cols, rows)
 }
 
@@ -223,7 +233,7 @@ func (l *Launcher) RestoreCommand(e persist.Entry, presets preset.Set) (*Child,
 	if e.PresetRef != "" {
 		for _, p := range presets.Processes {
 			if p.Name == e.PresetRef {
-				return l.LaunchCommandPreset(p, e.Name, "")
+				return l.LaunchCommandPreset(p, e.Name, LaunchContext{})
 			}
 		}
 		// Preset has been deleted since the entry was saved. Fall
@@ -233,12 +243,12 @@ func (l *Launcher) RestoreCommand(e persist.Entry, presets preset.Set) (*Child,
 	if len(e.Argv) == 0 {
 		return nil, fmt.Errorf("restore: entry %s has no argv", e.ID)
 	}
-	return l.LaunchCommandArgv(e.Argv, e.Name, "", e.WorkDir, nil, false)
+	return l.LaunchCommandArgv(e.Argv, e.Name, LaunchContext{WorkDir: e.WorkDir}, nil, false)
 }
 
 // LaunchTerminal spawns a bare interactive shell. SPEC §7 kind=terminal.
 // argv defaults to $SHELL -i when empty.
-func (l *Launcher) LaunchTerminal(argv []string, displayName, parentID, workDir string, env []string) (*Child, error) {
+func (l *Launcher) LaunchTerminal(argv []string, displayName string, ctx LaunchContext, env []string) (*Child, error) {
 	if len(argv) == 0 {
 		sh := os.Getenv("SHELL")
 		if sh == "" {
@@ -255,11 +265,21 @@ func (l *Launcher) LaunchTerminal(argv []string, displayName, parentID, workDir
 		Argv:     argv,
 		Env:      env,
 		Name:     displayName,
-		ParentID: parentID,
-		WorkDir:  workDir,
+		ParentID: ctx.ParentID,
+		TaskID:   ctx.TaskID,
+		WorkDir:  ctx.WorkDir,
 	}, cols, rows)
 }
 
+func firstNonEmpty(values ...string) string {
+	for _, v := range values {
+		if v != "" {
+			return v
+		}
+	}
+	return ""
+}
+
 func (l *Launcher) writeMCPConfig(identity string) (string, error) {
 	dir, err := mcpRuntimeDir(identity)
 	if err != nil {