Without `< /dev/null`, claude detects the tmux PTY as stdin and blocks
waiting for user input that never arrives (the PTY never sends EOF).
The 3-second stdin-timeout only fires for pipe stdin, not TTY stdin.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Replace bare subprocess.Popen with `tmux new-session -d` so each agent
runs in a detached tmux session that inherits the tmux server's environment
(including ANTHROPIC_API_KEY / keychain access, which cron's minimal env
lacks — the root cause of intermittent empty log files).
- Track agents by tmux session name instead of PID; age is derived from the
state-file `started_at` timestamp rather than /proc/<pid>/stat.
- `_kill_agent` terminates via `tmux kill-session`; backward compat preserved
for old state files that stored a `pid`.
- Operators can now `tmux attach -t issue-<N>` to watch live output, or
`claude --resume issue-<N>` to continue the conversation afterward.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Cron runs with a minimal environment that doesn't include ~/.nix-profile/bin,
causing every invocation to crash with FileNotFoundError on 'tea'.
Closes#93
Polls Codeberg CI and State/Ready issues every 10 minutes, launching
Claude Code agents for CI fixes and issue work, with PID-based liveness
tracking and automatic timeout after 1 hour.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
