chore: release v0.3.1

### Fixed
- Orphan cleanup on macOS - TTY comparison now handles macOS '??' format
- Session kill orphan prevention - gt done and gt crew stop use KillSessionWithProcesses

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.3.1] - 2026-01-17
+
+### Fixed
+
+- **Orphan cleanup on macOS** - Fixed TTY comparison (`??` vs `?`) so orphan detection works on macOS
+- **Session kill leaves orphans** - `gt done` and `gt crew stop` now use `KillSessionWithProcesses` to properly terminate all child processes before killing the tmux session
+
 ## [0.3.0] - 2026-01-17
 
 ### Added

internal/cmd/info.go

@@ -74,6 +74,14 @@ type VersionChange struct {
 
 // versionChanges contains agent-actionable changes for recent versions
 var versionChanges = []VersionChange{
+	{
+		Version: "0.3.1",
+		Date:    "2026-01-17",
+		Changes: []string{
+			"FIX: Orphan cleanup on macOS - TTY comparison now handles macOS '??' format",
+			"FIX: Session kill orphan prevention - gt done and gt crew stop use KillSessionWithProcesses",
+		},
+	},
 	{
 		Version: "0.3.0",
 		Date:    "2026-01-17",

internal/cmd/version.go

@@ -12,7 +12,7 @@ import (
 
 // Version information - set at build time via ldflags
 var (
-	Version = "0.3.0"
+	Version = "0.3.1"
 	// Build can be set via ldflags at compile time
 	Build = "dev"
 	// Commit and Branch - the git revision the binary was built from (optional ldflag)