brain-dump-docs

brain-dump-docs is a skill for Claude Code, Codex from tkumata/AGENTS.md. It costs 35 tokens per session (870 once invoked), scanned A, original, MIT.

A Japanese-language guide for creating and updating development documents without changing source code.

In plain words
What is it for?
It is for writing project requirements, specifications, designs, plans, and architecture decision records.
Why use it?
It helps keep requirements, designs, plans, decisions, and unresolved questions organized and clearly distinguished.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It is for writing project requirements, specifications, designs, plans, and architecture decision records.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/tkumata/agents.md/brain-dump-docs
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.

Any agent
npx skills add tkumata/AGENTS.md --skill brain-dump-docs
Clone the repo
git clone --depth 1 https://github.com/tkumata/AGENTS.md

Made for: Claude Code, Codex.

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 brain-dump-docs

README.md
[![agentmods](https://agentmods.dev/badge/skills/tkumata/agents.md/brain-dump-docs/github.svg)](https://agentmods.dev/skills/tkumata/agents.md/brain-dump-docs)
Your own site
<a href="https://agentmods.dev/skills/tkumata/agents.md/brain-dump-docs"><img src="https://agentmods.dev/badge/skills/tkumata/agents.md/brain-dump-docs/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 brain-dump-docs

Your own site · 80×15
<a href="https://agentmods.dev/skills/tkumata/agents.md/brain-dump-docs"><img src="https://agentmods.dev/badge/skills/tkumata/agents.md/brain-dump-docs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 870 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00035 $0.00870
Opus 5 $0.00017 $0.00435
Sonnet 5 $0.00007 $0.00174
Haiku 4.5 $0.00003 $0.00087

Measured today against content hash abe01bac6706, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-16, from the pricing page.

Security

Grade A, and why

brain-dump-docs 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 today.

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.

codex-skills/brain-dump-docs/SKILL.md · 48 lines

What it actually says

Brain Dump Docs Skill

  • この Skill は、ユーザが brain-dump-docs を明示的に指定した場合のみ使用し、自動選択や文脈推定によって使用しない。
  • ユーザの意図を保ったまま、開発に必要な文書だけを作成または更新する。ソースコードは変更しない。
  • 相談や方針確認だけの依頼では文書を生成しない。実装計画を文書化しても、ユーザの承認なしに実装を開始しない。

Rules

  • 開発文書はリポジトリ規約に従い、指定がなければ日本語で作成する。
  • ユーザの明示的な指示とリポジトリ固有の文書規約を優先する。
  • 確定事項、仮定、候補、未決定事項を区別する。
  • 実装結果を左右し、既存情報から解決できない不明点だけを Open Questions に残す。
  • 依頼に必要な文書とコードだけを確認し、無関係な履歴や過去の計画を網羅的に調査しない。
  • 変更した文書と直接参照する仕様の範囲で確認する。
  • 実装後の再計画、完了処理、Finalization は行わない。
  • 規則が競合する場合は依頼範囲を広げない。

Artifacts

リポジトリに文書の名称、配置、形式、承認規約がある場合はそれに従う。規約がない場合は以下を既定とする。

  • docs/current/REQUIREMENTS.md: 要求、制約、受け入れ条件
  • docs/current/SPECIFICATIONS.md: 外部動作、入出力、状態、エラー、境界条件
  • docs/current/DESIGN.md: 責務、依存関係、外部境界、主要データ構造
  • docs/current/PRD.md: 背景、対象ユーザ、ゴール、スコープ、成功指標
  • docs/adr/NNNN-short-title.md: 長期的な変更コストを持つ設計判断
  • docs/plans/active/YYYY-MM-DD-short-name.md: 小規模変更は会話で範囲を提示できるようにし、plan は明示要求・複数段階・別セッションへの引き継ぎに限定

ADR は上書きせず、判断を変更する場合は新しい ADR を作成する。

承認済み範囲は維持し、変更された範囲だけを未承認として扱う。ユーザ承認なしに approved と記録しない。

Active Plan

  • 新規作成時のみ references/active-plan-template.md に従うこと。
  • 各タスクに対象範囲、必要な仕様、受け入れ条件、検証方法を記載する。未決定事項は Open Questions に残す。
  • 独立して実装・検証できる単位で分割する。
  • 既存 plan は既存構造を優先し、テンプレート適合だけを目的に書き換えない。

Completion

  • 依頼された文書を必要十分な範囲で更新し、変更した成果物と残った Open Questions を短く報告して終了する。
  • 未承認の実装がある場合は承認対象を示して停止する。清書だけの場合は実装承認について報告しない。
Files

What ships with it

1 file 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. today First seen · 48 lines · 35 tokens per session scan A abe01bac6706

Subscribe to this mod's changes

brain-dump-docs is a skill published in the GitHub repository tkumata/AGENTS.md (1 stars, last pushed today), licensed MIT. It adds 35 tokens to every session and 870 once invoked, about $0.0002 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 2026-09-16.

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