brain-hydrate

brain-hydrate is a skill for Claude Code, Cursor from robertsfeir/atelier-pipeline. It costs 90 tokens per session (2,850 once invoked), scanned A, original, Apache-2.0.

A skill that reads existing project documents and Git history to capture the reasons behind past decisions in an assistant’s project memory.

In plain words
What is it for?
Use it to scan architecture decisions, feature specifications, user-experience documents, commits, and recurring errors before saving approved insights.
Why use it?
It helps an agent understand institutional knowledge that code, documents, and commit messages may not explain clearly.

Skill for Claude CodeCursor

Written for Cursor and Claude Code: a Cursor plugin manifest, but also shipped in a Claude Code plugin. Also seen: reads .claude/ paths; mentions subagents.

Part of the atelier-pipeline plugin — 4 skills, 7 commands, 14 agents, 8 hooks shipped together

Good fit Use it to scan architecture decisions, feature specifications, user-experience documents, commits, and recurring errors before saving approved insights.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/robertsfeir/atelier-pipeline/brain-hydrate
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 robertsfeir/atelier-pipeline --skill brain-hydrate
Clone the repo
git clone --depth 1 https://github.com/robertsfeir/atelier-pipeline

Made for: Claude Code, Cursor.

Or install atelier-pipeline, the plugin that ships this one along with the rest of its 4 skills, 7 commands, 14 agents, 8 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 brain-hydrate

README.md
[![agentmods](https://agentmods.dev/badge/skills/robertsfeir/atelier-pipeline/brain-hydrate/github.svg)](https://agentmods.dev/skills/robertsfeir/atelier-pipeline/brain-hydrate)
Your own site
<a href="https://agentmods.dev/skills/robertsfeir/atelier-pipeline/brain-hydrate"><img src="https://agentmods.dev/badge/skills/robertsfeir/atelier-pipeline/brain-hydrate/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-hydrate

Your own site · 80×15
<a href="https://agentmods.dev/skills/robertsfeir/atelier-pipeline/brain-hydrate"><img src="https://agentmods.dev/badge/skills/robertsfeir/atelier-pipeline/brain-hydrate.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 90 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,850 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 $0.00090 $0.02850
Opus 5 $0.00045 $0.01425
Sonnet 5 $0.00018 $0.00570
Haiku 4.5 $0.00009 $0.00285

Measured 11d ago against content hash 7ccd533bc0a7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

brain-hydrate 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 11d 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.

.cursor-plugin/skills/brain-hydrate/SKILL.md · 247 lines

How it starts

The opening of the file, as written. The whole thing — 247 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Atelier Brain -- Hydrate

This skill reads existing project artifacts and git history, extracts reasoning and decisions, and captures them as brain thoughts with proper types, importance scores, and relations. Run this conversationally -- present the scan results, get approval, then execute.

Core Principle

Extract the WHY, never the WHAT. Artifacts on disk are the source of truth for current state. Git is the source of truth for what changed and when. The brain captures reasoning, rejected alternatives, evolution context, and lessons -- the knowledge layer that no file or commit preserves.

Never duplicate artifact content. A decision thought references the ADR it came from but does not restate the ADR. A lesson thought captures the insight, not the code that was fixed.


Phase 1: Scan & Inventory

Before extracting anything, scan the project and present an inventory.

Read the full file on GitHub · 247 lines

Files

What ships with it

2 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. 11d ago First seen · 247 lines · 90 tokens per session scan A 7ccd533bc0a7

Subscribe to this mod's changes

brain-hydrate is a skill published in the GitHub repository robertsfeir/atelier-pipeline (25 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 90 tokens to every session and 2,850 once invoked, about $0.0005 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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