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 PaulRBerg/agent-skills --skill agents-braingit clone --depth 1 https://github.com/PaulRBerg/agent-skillsWrote 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/paulrberg/agent-skills/agents-brain)<a href="https://agentmods.dev/skills/paulrberg/agent-skills/agents-brain"><img src="https://agentmods.dev/badge/skills/paulrberg/agent-skills/agents-brain/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/paulrberg/agent-skills/agents-brain"><img src="https://agentmods.dev/badge/skills/paulrberg/agent-skills/agents-brain.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 | $0.00056 | $0.04467 |
| Opus 5.5 | $0.00022 | $0.01787 |
| Sonnet 5.5 | $0.00011 | $0.00893 |
| Haiku 4.5 | $0.00006 | $0.00447 |
Grade A, and why
agents-brain 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 yesterday.
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.
Requires curl and a writable user cache directory. Network access populates or refreshes the official Anthropic and How it starts
The opening of the file, as written. The whole thing — 308 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agents Brain
If these instructions are already present in the conversation from a slash or dollar invocation, follow them directly. In that case, do not invoke this skill again through a skill tool.
Apply explicit user instructions and established authorization before this skill's defaults. Do not ask again for an unchanged decision. Preserve host restrictions and required destructive-action approval.
Read this file and each reference in separate reads, each sized to the whole file. A truncated read drops rules silently.
Routes
maintain [path] [target ...] [flags]: Maintain context and apply task-backed skill lifecycle changes. Use this route by default for context maintenance or inspection. Read references/maintain.md.create-skill [skill-name]: Create a project-local skill from an explicit request. Read references/create-skill.md. Apply its repository catalog guard before scaffolding. Explicit creation does not require recurring-use evidence.create-agents-md [path] [--root-only] [--dry-run] [--force]: Initialize AGENTS.md files for a scope from an explicit request. Create the scope-root file and judge each subtree for a nested file. Read references/create-agents-md.md.
Choose the route before discovery or writes. All routes use the prompting and STE requirements below. The maintenance
sections govern maintain. Each creation reference owns its route's scope, workflow, validation, and report.
Maintenance Scope
Maintain repo-local context as one coherent system. It includes these targets:
- Human-facing README.md files.
- Agent-facing AGENTS.md files, with companion CLAUDE.md symlinks only for pre-native Claude Code. See Claude Code Compatibility below.
- Existing project-installed skills under
.agents/skillsand eligible source-catalog skills underskills/<name>/. - Context docs: other Markdown files, under any name or directory, that provide durable guidance for agents or humans. Examples include conventions, command catalogs, data-format rules, workflow runbooks, and reference material.
What ships with it
11 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.
- agents/openai.yaml 42 B
- references/asd-ste100.md 6.8 KB
- references/create-agents-md.md 6.5 KB
- references/create-docs.md 5.9 KB
- references/create-skill.md 9.1 KB
- references/maintain-skills.md 9.1 KB
- references/maintain.md 13 KB
- references/writing-great-skills.md 13 KB
- scripts/fetch-agentskills-spec.sh 8.7 KB runs code
- scripts/fetch-guidance.sh 9.0 KB runs code
- scripts/preflight.sh 1.4 KB runs code
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.
- yesterday Changed · -12 lines 0d64adc1c7f2
- 17d ago Changed · +8 lines · +5 tokens per session 237023838a7b
- 26d ago Changed · +21 lines · +4 tokens per session f85a58e28835
- 27d ago Changed · +9 lines 308b9f1be707
- 1mo ago Changed · +13 lines bb075fabda0f
- 1mo ago Changed 95dae8e9121f
- 1mo ago Changed · +52 lines · +10 tokens per session 9500e11b414e
- 1mo ago Changed · +4 lines 8970a651d4b9
- 1mo ago Changed 0171df82b8e5
- 1mo ago First seen · 213 lines · 37 tokens per session scan A 6f47e747713f
agents-brain is a skill published in the GitHub repository PaulRBerg/agent-skills (104 stars, last pushed 2d ago), licensed MIT. It adds 56 tokens to every session and 4,467 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 2026-08-30.
agents-brain compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| agents-brainPaulRBerg/agent-skills | Skill | 104 | 2d ago | MIT | A | 56 | Claude Code, Codex |
| imagegenopenai/codex | Skill | 134k | today | Apache-2.0 | A | 113 | Codex |
| local-ai-agentsmicrosoft/ai-agents-for-beginners | Skill | 79k | 2d ago | MIT | A | 200 | Claude Code, Codex |
| playwright-climicrosoft/playwright | Skill | 100k | yesterday | Apache-2.0 | A | 19 | Claude Code |
| browser-automationopenclaw/openclaw | Skill | 394k | today | MIT | A | 36 | Claude Code |
| systematic-debuggingobra/superpowers | Skill | 315k | 5d ago | MIT | A | 21 | Claude Code |
| next-cache-components-adoptionvercel/next.js | Skill | 143k | today | MIT | A | 95 | Claude Code |