ktg-plugin-marketplace/plugins/ultraplan-local/templates/headless-launch-template.md

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# Headless Launch Script Template
This template is used by the session-decomposer agent to generate a launch script
for headless execution of decomposed sessions.
## Template
```bash
#!/usr/bin/env bash
# Headless launch script — generated by ultraplan-local
# Master plan: {plan_path}
# Generated: {date}
# Sessions: {total_sessions} ({parallel_count} parallel, {sequential_count} sequential)
set -euo pipefail
# Prevent accidental API billing — remove this line if you intend to use API credits
unset ANTHROPIC_API_KEY
PLAN_DIR="{session_dir}"
LOG_DIR="{session_dir}/logs"
mkdir -p "$LOG_DIR"
echo "=== Ultraplan Headless Execution ==="
echo "Plan: {plan_path}"
echo "Sessions: {total_sessions}"
echo ""
# --- Wave {N}: Parallel sessions (no dependencies) ---
echo "--- Wave {N}: {description} ---"
{# For each parallel session in this wave: }
claude -p "$(cat "$PLAN_DIR/session-{n}-{slug}.md")" \
--dangerously-skip-permissions \
> "$LOG_DIR/session-{n}.log" 2>&1 &
PID_{n}=$!
echo "Started session {n}: {title} (PID $PID_{n})"
{# After all parallel sessions in this wave: }
echo "Waiting for Wave {N} to complete..."
wait $PID_{n1} $PID_{n2}
echo "Wave {N} complete."
echo ""
# --- Verify wave results ---
echo "--- Verifying Wave {N} ---"
{# For each session in the wave, run its exit condition commands }
{verify_commands}
# --- Wave {N+1}: Sequential sessions (depends on previous wave) ---
{# Repeat wave pattern for dependent sessions }
echo ""
echo "=== All sessions complete ==="
echo "Review logs in $LOG_DIR/"
echo "Run final verification: {final_verify_command}"
```
## Rules for the session-decomposer
When generating a launch script from this template:
1. **Group sessions into waves** by dependency. Sessions with no dependencies
or whose dependencies are all in earlier waves can run in the same wave.
2. **Each wave waits for completion** before the next wave starts.
3. **Verification runs after each wave** — if verification fails, the script
stops and reports which session failed.
4. **Log each session** to a separate file for debugging.
5. **Use `claude -p`** with the session spec file as the prompt.
6. **Use `--dangerously-skip-permissions`** rather than `--allowedTools` — the
executor needs flexible tool access and enumerating every tool is fragile.
7. **Final verification** at the end runs the master plan's verification section.
8. **Never include secrets** in the generated script.
9. **Wave verification must be independent.** After each wave completes, run
verification commands fresh via Bash — never parse session log files as proof
of success. Log files contain executor self-reporting, not ground truth. The
command's exit code is the only authoritative verification signal.
10. **Billing preamble.** Prepend `unset ANTHROPIC_API_KEY` with a comment at
the top of the script to prevent accidental API billing. Users who intend
to use API credits can remove this line.