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#+TITLE: AUTO-FLUSH capability — proven live in the archsetup session
#+SOURCE: from archsetup
#+DATE: 2026-07-02 01:26:20 -0400
AUTO-FLUSH capability — proven live in the archsetup session 2026-07-02, Craig asks that it be promoted to all projects and recommended as part of the no-approvals speedrun to keep sessions sharp.
Problem: /clear is a user-only keystroke, so long autonomous sessions either bloat or hit arbitrary auto-compaction. Craig can't always be around to type it.
Mechanism (companion script: self-inject.sh, sent separately to this inbox):
1. At a clean task boundary, the agent refreshes .ai/session-context.org exactly as the flush skill does (checkpoint with Active Goal / Decisions / Next Steps).
2. It derives its own tmux pane: match pane_pid from 'tmux list-panes -a' against its process ancestry (the ai launcher runs every agent session inside tmux, so this holds everywhere).
3. It arms the injection VIA THE TMUX SERVER — tmux run-shell -b "sleep 25; tmux send-keys -t %N -l '/clear'; tmux send-keys -t %N Enter; sleep 15; tmux send-keys -t %N -l 'go — auto-flush resume: read .ai/session-context.org and continue per Next Steps'; tmux send-keys -t %N Enter" — and immediately ends its turn so the prompt is idle when the keys land.
4. /clear fires the SessionStart hook (which already points a fresh context at notes.org + session-context.org), and the injected resume line starts the next turn. Zero human keystrokes.
Gotchas learned the hard way:
- A detached child (setsid/nohup/&) of a tool call DIES when the tool call ends; only tmux run-shell -b (server-owned) survives the turn boundary.
- Under run-shell the process is a child of the tmux server, so ancestry-based pane detection can't run there — derive the pane first from the agent's shell, pass it explicitly.
- Collision: if the user is typing when the keys fire, the injection merges into their input (a real /clear became '/clearto' mid-word). Fine for unattended sessions; warn the user to keep hands off the armed window if present.
Suggested integration: an 'auto' mode on the flush skill (checkpoint, then self-inject instead of prompting the user), plus a line in the no-approvals speedrun workflow to auto-flush at clean boundaries when context grows heavy. The script could live in claude-templates' .ai/scripts/ so every project gets it on sync.
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