Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add byerlikaya/claude-starter-kit --skill brainstormgit clone --depth 1 https://github.com/byerlikaya/claude-starter-kitWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/byerlikaya/claude-starter-kit/brainstorm)<a href="https://agentmods.dev/skills/byerlikaya/claude-starter-kit/brainstorm"><img src="https://agentmods.dev/badge/skills/byerlikaya/claude-starter-kit/brainstorm/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/byerlikaya/claude-starter-kit/brainstorm"><img src="https://agentmods.dev/badge/skills/byerlikaya/claude-starter-kit/brainstorm.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00049 | $0.00759 |
| Opus 5.5 | $0.00020 | $0.00304 |
| Sonnet 5.5 | $0.00010 | $0.00152 |
| Haiku 4.5 | $0.00005 | $0.00076 |
Grade A, and why
brainstorm scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 50 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Brainstorm — diverge before you converge
Trigger phrases: "brainstorm", "explore options", "not sure what we want", "help me scope", "ideate"
When
The ask is under-defined: the goal, the users, or the shape of the solution aren't clear yet, so jumping
straight to spec-planning would just plan the wrong thing. This is the front-end of planning, not a
replacement — brainstorm diverges (widens the option space), spec-planning converges (breaks the chosen
option into tasks). If scope is already clear, skip this and go straight to [[spec-planning]].
The loop
- Frame the real problem — restate the request as the underlying need in one sentence ("the user wants X so that Y"). Separate the stated solution from the goal; often the solution is negotiable, the goal isn't.
- Diverge — generate distinct directions. Produce 2–4 genuinely different approaches, not variations of one. For each: the core idea, who it serves, the main trade-off. Include a deliberately cheap/minimal option (fight gold-plating early).
- Surface the unknowns — list assumptions and open questions that would change the answer. Mark which are blocking (must resolve before planning) vs. deferrable.
- Converge — ask, don't guess. Present the directions as explicit numbered options and let the user choose (CLAUDE.md discipline: a decision point = multiple choice, never a prose either/or). Record the chosen direction + the rejected ones with the one-line reason they lost.
- Hand off. The chosen direction + resolved constraints flow into
spec-planning; a lasting architectural choice made here is recorded with [[adr]].
Guardrails
- Bounded, not open-ended. Divergence has a stop: 2–4 options, then converge. Endless ideation with no decision is the failure mode, not thoroughness.
- No premature convergence either. Don't collapse to the first idea to look decisive — the point is that the option space was actually explored before a direction was picked.
- Evidence over invention. Read the existing code/data and state assumptions explicitly; a plausible guess presented as fact is worse than a named unknown.
- Token discipline ([[token-budget]]): the options + the decision are a short summary to the main thread;
push a long exploration to
docs/DISCOVERY.mdand return the option headings + the choice.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 50 lines · 49 tokens per session scan A 07d3bc34787e
brainstorm is a skill published in the GitHub repository byerlikaya/claude-starter-kit (24 stars, last pushed 1mo ago), licensed MIT. It adds 49 tokens to every session and 759 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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