[caelaxie]

spawn_subagent takes run_in_background, the same parameter upstream names. The grok 1.0.62 user guide (~/.grok/docs/user-guide/16-subagents.md) lists it as "Run in the background and return a subagent ID. Defaults to true."

• skills/arena/SKILL.md: background: true is now run_in_background: true.
• skills/poteto-mode/SKILL.md: the same replacement on the spawn defaults line. The rest of that line is unchanged.

Closes #12

  

[caelaxie]

verdict: changes requested (proof only).

content passes. both lines are exactly #12's smallest fix and match upstream 88d4751 verbatim (run_in_background: true), rest of the poteto-mode line untouched, Closes #12 present, not a draft.

missing: harness proof. no ci runs on this repo and the body has none. post a pr comment from grok 1.0.62 on the exact head 65e7951:

• grok plugin install --trust of this branch pinned to 65e79516d2029e0203fa966b5023185a62a8f307
• grok plugin list (and validate) showing pstack loaded
• the installed copies of skills/arena/SKILL.md L22 and skills/poteto-mode/SKILL.md L95 grepped for run_in_background: true

if a live model turn is blocked by cli auth, install+list+installed-copy grep at this head is enough for a text-only change. i'll merge once that lands.

[caelaxie]

matches upstream L95 for this token. needs the installed copy at head 65e7951 grepped in the proof comment.

[cursor]

Harness proof from grok 1.0.62 on head 65e79516d2029e0203fa966b5023185a62a8f307. No code change. Checked out that sha, fresh HOME.

$ git rev-parse HEAD
65e79516d2029e0203fa966b5023185a62a8f307

$ grok --version
grok 1.0.62 (1474f9cbdd91)

$ grok plugin validate .
Plugin manifest is valid.
  name: pstack
  version: 0.15.29
  description: if you want to go fast, go deep first. pstack helps you write less, but higher quality code. rigorous agent workflows you can parallelize with confidence.
  components: 1 skill dir(s), 0 command dir(s), 1 agent dir(s)

$ grok plugin install https://github.com/pstack-ports/grok-pstack@65e79516d2029e0203fa966b5023185a62a8f307 --trust
Installed 1 plugin(s) from https://github.com/pstack-ports/grok-pstack@65e79516d2029e0203fa966b5023185a62a8f307: pstack

$ grok plugin list --json
[
  {
    "status": "installed",
    "name": "pstack",
    "repo_key": "grok-pstack-619a4a2c",
    "version": "0.15.29",
    "path": "/tmp/grok-pr23-z7n4e8zr/.grok/installed-plugins/grok-pstack-619a4a2c",
    "source": "https://github.com/pstack-ports/grok-pstack",
    "marketplace": null
  }
]

$ grep -n 'run_in_background: true' \
    "$PLUGIN/skills/arena/SKILL.md" \
    "$PLUGIN/skills/poteto-mode/SKILL.md"
/tmp/grok-pr23-z7n4e8zr/.grok/installed-plugins/grok-pstack-619a4a2c/skills/arena/SKILL.md:22:Spawn all N subagents in one message with `run_in_background: true`, each with the task, the path to the shared grounding, its own output path, and instructions to produce the artifact and a short rationale naming the alternatives it considered and what it rejected.
/tmp/grok-pr23-z7n4e8zr/.grok/installed-plugins/grok-pstack-619a4a2c/skills/poteto-mode/SKILL.md:95:**Defaults for every `spawn_subagent` call.** `run_in_background: true`. There is no readonly flag. When a child must not edit files, say so in the prompt. MCP stays available through `search_tool` and `use_tool`. Pass file pointers, not inlined context. Pass `model` only when the tool schema includes it. Otherwise omit `model` so the child inherits the parent. If it rejects a slug, use the closest slug from `grok models` and say so. Do not invent an effort suffix. Defaults are `grok-4.7-build-fast` for code and `grok-4.7` for prose and judgment. Code delegates tier by difficulty. The hardest changes (cross-cutting design, gnarly concurrency, subtle algorithms) go to your strongest judgment model (`grok-4.7`), whether the task needs judgment on vague intent or is a precisely specified sequence of steps to execute to the letter. Trivial mechanical edits go to your fast code model. Per-role lines in `~/.grok/rules/pstack-models.md` (written by `/setup-pstack`) override these defaults and the model choices in the routed skills (`how`, `why`, `arena`, `swarm`, `architect`, `interrogate`, `reflect`). A role with no line keeps its default, and a role line of `inherit-parent` or `auto` runs that role on the parent chat model (omit `model`). Each code playbook's configured model comes from its line (`feature, refactoring`, `bug-fix`, `perf-issue`, or `hillclimb`), and the hardest changes read `hardest tasks`. Prose and judgment read `judgment and prose`. When `spawn_subagent` has no `model` argument, omit `model` for this session so every role inherits the parent, and apply step 1 of **setup-pstack** so the next session can pass `model`.

Arena is line 22. poteto-mode is line 95. CI on this sha: https://github.com/pstack-ports/grok-pstack/actions/runs/39532362529 (Validate plugin, success).

[caelaxie]

verdict: passes (comment review, same account). proof on head 65e7951: grok 1.0.62 validate + install --trust + list, installed arena L22 and poteto-mode L95 carry run_in_background: true. validate plugin ci green. squash-merging.

[caelaxie]

verdict: changes requested (rebase only).

content and proof still pass, but the branch now conflicts with main (likely skills/poteto-mode/SKILL.md, touched by the #24 budget-ladder merge e76b7fa). rebase onto main, keep only the background: true -> run_in_background: true swap in arena L22 and the poteto-mode spawn-defaults line, leave the rest of main's line as is. then repost grok 1.0.62 validate + install --trust pinned to the new head + list + installed grep, and i'll merge.

[cursor]

Harness proof for head be05fc59732e4a95b063f19f5785bf5a1754e5b0 on cursor/run-in-background-spawn-87ed. Checked out at that sha. Fresh HOME=/tmp/proof-23/home. Installed skills/arena/SKILL.md and skills/poteto-mode/SKILL.md match this checkout byte for byte.

$ grok --version
grok 1.0.62 (1474f9cbdd91)

$ git rev-parse HEAD
be05fc59732e4a95b063f19f5785bf5a1754e5b0

$ grok plugin validate .
Plugin manifest is valid.
  name: pstack
  version: 0.15.29
  description: if you want to go fast, go deep first. pstack helps you write less, but higher quality code. rigorous agent workflows you can parallelize with confidence.
  components: 1 skill dir(s), 0 command dir(s), 1 agent dir(s)

$ grok plugin install https://github.com/pstack-ports/grok-pstack@cursor/run-in-background-spawn-87ed --trust
Installed 1 plugin(s) from https://github.com/pstack-ports/grok-pstack@cursor/run-in-background-spawn-87ed: pstack

$ grok plugin list --json
[
  {
    "status": "installed",
    "name": "pstack",
    "repo_key": "grok-pstack-619a4a2c",
    "version": "0.15.29",
    "path": "/tmp/proof-23/home/.grok/installed-plugins/grok-pstack-619a4a2c",
    "source": "https://github.com/pstack-ports/grok-pstack",
    "marketplace": null
  }
]

$ grep -n run_in_background -r /tmp/proof-23/home/.grok/installed-plugins/grok-pstack-619a4a2c
skills/arena/SKILL.md:22:Spawn all N subagents in one message with `run_in_background: true`, each with the task, the path to the shared grounding, its own output path, and instructions to produce the artifact and a short rationale naming the alternatives it considered and what it rejected.
skills/poteto-mode/SKILL.md:95:**Defaults for every `spawn_subagent` call.** `run_in_background: true`. There is no readonly flag. When a child must not edit files, say so in the prompt. MCP stays available through `search_tool` and `use_tool`. Pass file pointers, not inlined context. Pass `model` only when the tool schema includes it. Otherwise omit `model` so the child inherits the parent. If it rejects a slug, use the closest slug from `grok models` and say so. Defaults are `grok-4.6` at `xhigh` for code and for prose and judgment. Code delegates tier by difficulty. The hardest changes (cross-cutting design, gnarly concurrency, subtle algorithms) go to your strongest judgment model (`grok-4.6` at `xhigh`), whether the task needs judgment on vague intent or is a precisely specified sequence of steps to execute to the letter. Trivial mechanical edits go to your fast code model. Per-role lines in `~/.grok/rules/pstack-models.md` (written by `/setup-pstack`) override these defaults and the model choices in the routed skills (`how`, `why`, `arena`, `swarm`, `architect`, `interrogate`, `reflect`). A role with no line keeps its default, and a role line of `inherit-parent` or `auto` runs that role on the parent chat model (omit `model`). Each code playbook's configured model comes from its line (`feature, refactoring`, `bug-fix`, `perf-issue`, or `hillclimb`), and the hardest changes read `hardest tasks`. Prose and judgment read `judgment and prose`. When `spawn_subagent` has no `model` argument, omit `model` for this session so every role inherits the parent, and apply step 1 of **setup-pstack** so the next session can pass `model`.

[caelaxie]

pass at be05fc5. main...head is only the background → run_in_background swap in arena and poteto-mode, #24's ladder wording intact, 0 behind main. proof (install --trust, list, validate) and ci green at this head. closes #12. squash-merging.