| name | subagent-spawn-command-builder |
| description | Build sessions_spawn command payloads from JSON profiles. Use when you want reusable subagent profiles (model/thinking/timeout/cleanup/agentId/label) and command-ready JSON without executing spawn. |
subagent-spawn-command-builder
Generate sessions_spawn payload JSON from profile config.
This skill does not execute sessions_spawn; it only builds payload/command JSON.
Files
- Builder script:
scripts/build_spawn_payload.mjs
- Builder log:
state/build-log.jsonl
Supported sessions_spawn parameters
task (required)label (optional)agentId (optional)model (optional)thinking (optional)runTimeoutSeconds (optional)cleanup (keep|delete, optional)cwd (optional) — working directory for the subagentmode (run|session, optional)
Setup
Read the "Subagent Spawn Profiles" table in TOOLS.md for default values per profile. Pass values as explicit CLI arguments (--model, --thinking, --run-timeout-seconds, --cleanup). The --profile flag is now a logging label, not a lookup key for a config file.
Generate payload
skills/subagent-spawn-command-builder/scripts/build_spawn_payload.mjs \
--profile heartbeat \
--task "Analyze recent context and return a compact summary" \
--label heartbeat-test \
--model claude-sonnet-4-20250514 \
--thinking low \
--run-timeout-seconds 300 \
--cleanup delete
The script prints JSON directly usable for sessions_spawn.
Merge/priority rule
All values come from explicit CLI arguments. --profile is a logging label only (not a config lookup key). Refer to the "Subagent Spawn Profiles" table in TOOLS.md for recommended defaults per profile.
task always comes from CLI --task.
CLI options
Note: this builder is Node.js (.mjs) based. If generated tasks include Python execution steps, write commands with python3 (not python).
--profile (required)--task (required)--label--agent-id--model--thinking--run-timeout-seconds--cleanup keep|delete--cwd <path>--mode run|session
