v0.9.0 - agent_done

Highlights

• Added hook-backed agent_done turn completion for codex_agent, grok_agent, and composer_agent.
• Added pty_send(wait: "agent_done") so callers can wait for the agent CLI turn boundary while keeping the persistent PTY model.
• Added managed Codex/Grok/Composer vendor homes so aiterm-owned Stop hooks are installed without editing the user's normal hook files.
• Hardened event matching, wait locks, hook event files, Grok auth lock handling, malformed JSONL handling, cleanup, and screen settling.
• Added a TUI-ready gate so the first unbound wait: "agent_done" send fails before sending text if the agent has not reached an input prompt.
• Documented platform support and usage in README, design docs, ADR, and RAG.

Verification

• Local npm test: 167/167 passed.
• GitHub Actions CI for tag v0.9.0: Linux, macOS, Windows, and npm publish passed.
• npm published as aiterm-mcp@0.9.0.
• Real MCP tools/call smoke verified Codex, Grok, Composer agent_done, plus a normal Python REPL PTY smoke.