---name: jackin-brainstormdescription: Use only when the user explicitly requests this skill. Turns a jackin❯ roadmap item's intent into concrete design decisions through freeform discussion, written into its ## Design.argument-hint: <slug> [--research] [--resume]disable-model-invocation: truelicense: Apache-2.0user-invocable: true---

jackin-brainstorm

Turn an existing roadmap item's intent (and any gathered research) into concrete design decisions, through open back-and-forth with the operator, written incrementally into the item's ## Design section.

Judgment task — describe and decide; do not script it, do not write code, do not break work into tasks (that is plan, deferred).

When to use

• Operator runs jackin-brainstorm <slug> to design an open roadmap item.

When NOT to use

• Creating the item → jackin-propose.
• Large external/codebase investigation → jackin-research.
• Implementing → /goal Implement <slug>.md.

Arguments

• --research — run jackin-research first if the item looks thin.
• --resume — continue from the current ## Design state.

Process

1. Load context. Read docs/content/docs/roadmap/<slug>.mdx — Problem, Why It Matters, Design-so-far, Related Files — plus any research already linked.
2. Discuss freeform. Open back-and-forth: surface alternatives, trade-offs, open questions. Pull in jackin❯ design principles and the relevant rule files (ENGINEERING.md, HOST_AND_CONTAINER.md, TUI/docs rules) as constraints. Prefer one question at a time; check in as each part settles.
3. Write incrementally. As each point settles, append or update the matching part of ## Design in the .mdx — the decision plus a one-line why. --resume picks up from there.
4. Hit an unknown? Gather quickly (Explore/grep, or deep-research). Large investigation → spin a separate jackin-research dossier and link it from ## Design. Then resume deciding.
5. Converge. When ## Design covers the approach end to end, summarize and point at the implementation step (/goal Implement <slug>.md).
6. Commit + push. docs: per settled chunk (push after every commit).

Common mistakes

• Writing code, or filling ## Tasks — out of scope.
• Dumping a finished design without the back-and-forth, or asking many questions at once.
• Recording decisions only in chat instead of into ## Design (it must be resumable).
• Restating rule-file content instead of referencing it by name.