Borrowing it
Nothing to install: this file belongs to luanmorenommaciel/agentspec. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/luanmorenommaciel/agentspec/main/.claude/skills/sdd-brainstorm/SKILL.mdgit clone --depth 1 https://github.com/luanmorenommaciel/agentspecWrote 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/luanmorenommaciel/agentspec/sdd-brainstorm)<a href="https://agentmods.dev/skills/luanmorenommaciel/agentspec/sdd-brainstorm"><img src="https://agentmods.dev/badge/skills/luanmorenommaciel/agentspec/sdd-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/luanmorenommaciel/agentspec/sdd-brainstorm"><img src="https://agentmods.dev/badge/skills/luanmorenommaciel/agentspec/sdd-brainstorm.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00184 | $0.02365 |
| Opus 5 | $0.00092 | $0.01182 |
| Sonnet 5 | $0.00037 | $0.00473 |
| Haiku 4.5 | $0.00018 | $0.00236 |
Grade A, and why
sdd-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 7d 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 — 206 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SDD Brainstorm — Phase 0 exploration
Turn a raw idea into a validated approach and a BRAINSTORM document ready for /define.
This skill owns the Phase 0 methodology. The brainstorm-agent executes it and the /brainstorm command is the user entrypoint; both load this file instead of restating it. Contract-grade facts below mirror .claude/sdd/architecture/WORKFLOW_CONTRACTS.yaml — when in doubt, the contract wins.
Output contract
| Obligation | Value |
|---|---|
| Input types | raw idea, problem statement, feature request, rough notes, comparison request |
| Output file | .claude/sdd/features/BRAINSTORM_{FEATURE}.md — {FEATURE} in SCREAMING_SNAKE_CASE |
| Artifact shape | .claude/sdd/templates/BRAINSTORM_TEMPLATE.md — follow the template; do not invent or drop sections |
| Status values | Exploring → Approaches Identified → Ready for Define |
| Handoff | suggest /define .claude/sdd/features/BRAINSTORM_{FEATURE}.md |
Set Status: Exploring while questioning, Approaches Identified once options are on the table, and Ready for Define only after the quality gate passes. Phase 1 later stamps the document ✅ Complete (Defined) — leave that transition to /define.
Scope boundary
Brainstorm explores; Define captures. Route by readiness:
| Situation | Do |
|---|---|
| Vague idea, approach unknown | Run this skill |
| Comparison request ("X or Y?") | Run this skill, centered on approach exploration |
| Requirements already clear and validated | Skip to /define directly |
| A BRAINSTORM document already exists | /define with that file as input |
Knowledge architecture
KB-first resolution is mandatory: ground every recommendation before proposing it, in this order.
- KB discovery — read
.claude/kb/_index.yamland note which KB domains bear on the idea; they feed both your recommendations and the Define phase. - Codebase exploration — read
CLAUDE.mdfor project context; Glob the project structure (for example**/*.py,**/*.yaml) for existing patterns. - Confidence assignment — score each candidate approach by its evidence:
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.
- 7d ago First seen · 206 lines · 184 tokens per session scan A 2e1825fe9476
sdd-brainstorm is a skill published in the GitHub repository luanmorenommaciel/agentspec (246 stars, last pushed today), licensed MIT. It adds 184 tokens to every session and 2,365 once invoked, about $0.0009 per session on Opus 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 2026-09-01.
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