fix: enable terminal title control via change_title MCP tool #161
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…us#11) ## THE FIX Forward SIGTERM, SIGINT, SIGHUP to child Claude CLI process. This ensures child processes are killed when parent is terminated. ## ROOT CAUSE When switching between local/remote modes, the parent process was killed but child Claude CLI processes remained alive ("orphaned"). These orphaned processes continued to hold stdin, causing: - Duplicate/garbled characters when typing - "Competing processes" fighting for terminal input ## SOLUTION (from GitHub slopus/happy#430) ```javascript const forwardSignal = (signal) => { if (child.pid && !child.killed) { child.kill(signal); } }; process.on('SIGTERM', () => forwardSignal('SIGTERM')); process.on('SIGINT', () => forwardSignal('SIGINT')); process.on('SIGHUP', () => forwardSignal('SIGHUP')); ``` ## FILES CHANGED - scripts/claude_version_utils.cjs - binary launcher signal forwarding - src/claude/claudeLocal.ts - TypeScript launcher signal forwarding ## TESTED ✅ Fresh local mode - typing works ✅ Switch to remote mode - typing works ✅ Switch back to local mode - typing works (was broken) ✅ Multiple mode switches - stable ## IMPORTANT This is the ONLY fix needed. No stdin cleanup, no removeAllListeners(), no setRawMode changes required. Signal forwarding alone solves it. Closes slopus#11 References: slopus/happy#430, PR slopus#127 Generated with [Claude Code](https://claude.ai/code) via [Happy](https://happy.engineering) Co-Authored-By: Claude <noreply@anthropic.com> Co-Authored-By: Happy <yesreply@happy.engineering>
Re-apply terminal title feature (originally df7262c) that was lost when upstream main diverged. Sets iTerm2/Terminal.app window title via OSC escape sequences when change_title is invoked. - Add CLAUDE_CODE_DISABLE_TERMINAL_TITLE=1 to launcher to prevent Claude Code from overwriting the terminal title - Add setTerminalTitle() using OSC 0 escape sequence for direct window title control - change_title now sets both terminal title and Happy app title Tested: title updates work in iTerm2, remote→local mode switch still functions correctly (no stdin regression). Generated with [Claude Code](https://claude.ai/code) via [Happy](https://happy.engineering) Co-Authored-By: Claude <noreply@anthropic.com> Co-Authored-By: Happy <yesreply@happy.engineering>
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Summary
setTerminalTitle()function using OSC escape sequences to set iTerm2/Terminal.app window title whenchange_titleMCP tool is invokedCLAUDE_CODE_DISABLE_TERMINAL_TITLE=1env var to launcher to prevent Claude Code from overwriting the terminal titlechange_titlenow updates both the terminal window title (for desktop) and the Happy server (for mobile app)Context
The
change_titleMCP tool currently only sends the title to the Happy server for the mobile app. Desktop users (iTerm2, Terminal.app) don't see the title reflected in their terminal tabs/windows. This makes it hard to distinguish between multiple Happy sessions.This fix uses standard OSC 0 escape sequences (
\x1b]0;title\x07) which work with iTerm2, Terminal.app, and most modern terminal emulators.Test plan
change_titleis called🤖 Generated with Claude Code
via Happy