brainstorm

brainstorm is a skill for Claude Code from greglas75/zuvo. It costs 56 tokens per session (10,532 once invoked), scanned A, original, MIT.

A planning process for understanding a coding task, investigating the existing project, and writing a design specification before implementation begins. The specification must be approved before code is written.

In plain words
What is it for?
Use it for new features, major changes, or work that crosses several parts of a project. It helps define the problem, proposed design, boundaries, and conditions for success.
Why use it?
It turns a broad or complex feature request into an agreed plan, reducing misunderstandings and rework during implementation.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: reads .claude/ paths; mentions subagents; mentions Claude Code.

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is Every AC has an inline **Proof** sub-bullet — a deterministic procedure (or interaction-with-artifact for UI) that, when run, demonstrates the AC is satisfied. .

Part of the zuvo plugin — 57 skills, 48 agents, 5 hooks shipped together

Good fit Use it for new features, major changes, or work that crosses several parts of a project. It helps define the problem, proposed design, boundaries, and conditions for success.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/greglas75/zuvo
agentmods
npx agentmods add skills/greglas75/zuvo/brainstorm

Made for: Claude Code.

Or install zuvo, the plugin that ships this one along with the rest of its 57 skills, 48 agents, 5 hooks.

Wrote 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.

agentmods badge for brainstorm

README.md
[![agentmods](https://agentmods.dev/badge/skills/greglas75/zuvo/brainstorm/github.svg)](https://agentmods.dev/skills/greglas75/zuvo/brainstorm)
Your own site
<a href="https://agentmods.dev/skills/greglas75/zuvo/brainstorm"><img src="https://agentmods.dev/badge/skills/greglas75/zuvo/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.

agentmods 80×15 button for brainstorm

Your own site · 80×15
<a href="https://agentmods.dev/skills/greglas75/zuvo/brainstorm"><img src="https://agentmods.dev/badge/skills/greglas75/zuvo/brainstorm.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 10,532 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 7 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Prompt Injection · line 145
    Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.
    Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
  • high Prompt Injection · line 219
    Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.
    Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
  • medium Excessive Agency · line 353
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
  • medium Rogue Agent · line 133
    Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.
    Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
  • medium Excessive Agency · line 287
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
  • medium Rogue Agent · line 537
    Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.
    Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
  • medium Excessive Agency · line 582
    Skill allows unbounded resource consumption (API calls, storage, compute). Without rate limits or quotas, a compromised or misbehaving agent can cause denial-of-service or cost overruns.
    Fix: Set explicit rate limits, timeouts, and resource quotas for API calls, file operations, and compute. Implement circuit breakers for runaway loops.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00056 $0.10532
Opus 5.5 $0.00022 $0.04213
Sonnet 5.5 $0.00011 $0.02106
Haiku 4.5 $0.00006 $0.01053

Measured 5d ago against content hash 7a451c8a2c59, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

brainstorm scanned grade A with 1 finding 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 5d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

[Aggregator section. Lists the proof runners required by this spec (vitest, curl, playwright, chrome-devtools MCP, etc.) and any infrastructure prerequisites (test DB, fixture files, dev server). Per-AC proof bodies live
skills/brainstorm/SKILL.md · 704 lines

How it starts

The opening of the file, as written. The whole thing — 704 lines — stays where its author put it; the contents beside it link to each section on GitHub.

zuvo:brainstorm

Understand the problem thoroughly. Design a solution collaboratively. Write a spec. Get approval. Only then does anything get built.

Hard Gate

Do NOT write implementation code. This skill produces a design specification document. Implementation happens later via zuvo:plan and zuvo:execute. If the user asks to "just start coding" during brainstorm, explain that the spec must be approved first — skipping design leads to rework.

Mandatory File Loading

Phase 0 — Bootstrap (load before any work)

Include paths resolve relative to THIS SKILL.md's directory (not CWD): a ../../shared/includes/ reference means <plugin-root>/shared/includes/ — never resolve it against the project being worked on.

  1. ../../shared/includes/codesift-setup.md -- CodeSift discovery and initialization
  2. ../../shared/includes/env-compat.md -- Agent dispatch patterns per environment
  3. ../../shared/includes/acceptance-proof-protocol.md -- Per-AC proof contract for plan/execute
  4. ../../shared/includes/provided-artifact-supremacy.md -- Design-artifact supremacy (the Provided-Design Check runs BEFORE Phase 1, so this is Phase-0 mandatory, not deferred)

Deferred — Load when needed (NOT at startup)

  1. ../../rules/cq-patterns.md -- Load at Phase 3 (design decisions), NOT at Phase 0
  2. ../../shared/includes/run-logger.md -- Load at completion only
  3. ../../shared/includes/retrospective.md -- Load at completion only

Print the checklist:

CORE FILES LOADED:
  1. codesift-setup.md              -- READ
  2. env-compat.md                  -- READ
  3. acceptance-proof-protocol.md   -- READ
  4. provided-artifact-supremacy.md -- READ
  5. cq-patterns.md                 -- DEFERRED (Phase 3)
  6. run-logger.md                  -- DEFERRED (completion)
  7. retrospective.md               -- DEFERRED (completion)

If a Phase 0 file is missing, STOP. Deferred files are loaded when their phase begins.

Phase 0.1 — Retro checkpoint marker (run this bash at bootstrap)

Read the full file on GitHub · 704 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

  1. 5d ago Changed · +9 lines 7a451c8a2c59
  2. 7d ago Changed · +2 lines 73572604d447
  3. 25d ago Changed · +5 lines ce10546cda45
  4. 1mo ago Changed · -2 lines 9c79e22e77f2
  5. 1mo ago Changed · +6 lines d8af8d45b6c2
  6. 1mo ago First seen · 684 lines · 56 tokens per session scan A 89be60593dd4

Subscribe to this mod's changes

brainstorm is a skill published in the GitHub repository greglas75/zuvo (8 stars, last pushed today), licensed MIT. It adds 56 tokens to every session and 10,532 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.