domain-brainstorm

domain-brainstorm is a skill for Claude Code, Codex from gtapps/claude-code-hermit. It costs 80 tokens per session (1,327 once invoked), scanned A, original, MIT.

A codebase review helper that reads recent Git changes, test results, project manifests, and README coverage, then suggests up to two improvement ideas.

In plain words
What is it for?
Use it to find recurring problem areas, such as frequently changed files, weak test signals, outdated dependency files, or missing documentation.
Why use it?
It helps when you know something needs attention but cannot quickly identify the most useful fixes. Suggestions are sent through a review step before being turned into formal proposals.

Skill for Claude CodeCodex

Part of the claude-code-dev-hermit plugin — 7 skills, 1 hook shipped together

Install

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.

agentmods
npx agentmods add skills/gtapps/claude-code-hermit/domain-brainstorm
Any agent
npx skills add gtapps/claude-code-hermit --skill domain-brainstorm
Clone the repo
git clone --depth 1 https://github.com/gtapps/claude-code-hermit

Made for: Claude Code, Codex.

Or install claude-code-dev-hermit, the plugin that ships this one along with the rest of its 7 skills, 1 hook.

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 domain-brainstorm

README.md
[![agentmods](https://agentmods.dev/badge/skills/gtapps/claude-code-hermit/domain-brainstorm.svg)](https://agentmods.dev/skills/gtapps/claude-code-hermit/domain-brainstorm)
Your own site
<a href="https://agentmods.dev/skills/gtapps/claude-code-hermit/domain-brainstorm"><img src="https://agentmods.dev/badge/skills/gtapps/claude-code-hermit/domain-brainstorm.svg" alt="Measured on agentmods" height="20"></a>
Per session 80 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,327 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00080 $0.01327
Opus 5 $0.00040 $0.00664
Sonnet 5 $0.00016 $0.00265
Haiku 4.5 $0.00008 $0.00133

Measured 5d ago against content hash dbb2ac6a3033, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

domain-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 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.

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.

plugins/claude-code-dev-hermit/skills/domain-brainstorm/SKILL.md · 106 lines

How it starts

The opening of the file, as written. The whole thing — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Domain Brainstorm

Kill criteria (read before running)

After ≥8 invocations, check the capability-brainstorm segment of core's proposal metrics report — run .claude-code-hermit/bin/hermit-run proposal metrics .claude-code-hermit --source=capability-brainstorm (the project-resident bin/hermit-run resolves core's plugin root, which a path relative to this plugin can't reach), or read the capability-brainstorm row of the table /claude-code-hermit:hermit-evolution prints. If triage-survival < 25% or PROP-acceptance < 30%, treat it as a class-level signal that brainstorm output is noisy and raise it with the operator — the segment is shared with core's capability-brainstorm and the other domain brainstorm skills, so it cannot by itself say which skill to cut.

Gate 0 — Gather inputs

Read these in parallel — all are cheap working-tree reads. Do not run the test suite or install tools.

Git activity

git log --oneline -50
git log --format= --name-only -50 | sort | uniq -c | sort -rn | head -20

Note the 5 most-churned files and any subsystem clusters.

Test signal Read .claude-code-hermit/state/last-test.json (written by /dev-test). Extract status, exit_code, and duration_ms. If absent or last-modified >24h ago, note "no recent test run" — do not run the suite.

Manifest drift ls for package.json, Cargo.toml, pyproject.toml, go.mod. For each found, check its lockfile (package-lock.json/yarn.lock/pnpm-lock.yaml, Cargo.lock, poetry.lock, go.sum) exists alongside it. Flag any mismatch.

README coverage Read README.md and a one-level ls of the repo root. Note features or modules claimed in the README with no corresponding directory or file visible.

Gate 1 — Generate ideas (max 2)

Think across all four inputs. For each candidate, both constraints must pass before including it:

  1. Concrete friction — state the operator pain in one sentence. What breaks, slows, or misleads today without this fix? If no specific pain, discard.
  2. ≥2 named grounding items — cite at least two by name (e.g. git:cli/index.js, state:last-test.json duration=38s, file:package-lock.json missing, readme:§Feature X). These support the friction; friction is the bar.

Read the full file on GitHub · 106 lines

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 First seen · 106 lines · 80 tokens per session scan A dbb2ac6a3033

Subscribe to this mod's changes

domain-brainstorm is a skill published in the GitHub repository gtapps/claude-code-hermit (74 stars, last pushed today), licensed MIT. It adds 80 tokens to every session and 1,327 once invoked, about $0.0004 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 2026-08-30.

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