recall

recall is a skill for Claude Code, Codex from Yuno15-bb/c-brain. It costs 71 tokens per session (348 once invoked), scanned A, original, Apache-2.0.

A skill for searching an existing collection of personal notes for information about a topic, then reading the relevant notes. It uses the C Brain command-line tool and does not change the notes.

In plain words
What is it for?
Use it to check prior decisions, retrieve earlier research, answer questions about stored knowledge, or find out whether an issue was solved before.
Why use it?
It helps avoid solving a problem again when a past decision or piece of research is already recorded. It also makes clear when the notes contain no reliable answer.

Skill for Claude CodeCodex

Installs and runs on its own, but its text points at files inside its plugin — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed. Installing the plugin gets both.

Part of the c-brain plugin — 3 skills, 8 agents, 5 hooks 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/yuno15-bb/c-brain/recall
Any agent
npx skills add Yuno15-bb/c-brain --skill recall
Clone the repo
git clone --depth 1 https://github.com/Yuno15-bb/c-brain

Made for: Claude Code, Codex.

Or install c-brain, the plugin that ships this one along with the rest of its 3 skills, 8 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 recall

README.md
[![agentmods](https://agentmods.dev/badge/skills/yuno15-bb/c-brain/recall.svg)](https://agentmods.dev/skills/yuno15-bb/c-brain/recall)
Your own site
<a href="https://agentmods.dev/skills/yuno15-bb/c-brain/recall"><img src="https://agentmods.dev/badge/skills/yuno15-bb/c-brain/recall.svg" alt="Measured on agentmods" height="20"></a>
Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 348 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 $0.00071 $0.00348
Opus 5 $0.00036 $0.00174
Sonnet 5 $0.00014 $0.00070
Haiku 4.5 $0.00007 $0.00035

Measured 4d ago against content hash 32366e15f75a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

recall 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 4d 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.

skills/recall/SKILL.md · 39 lines

What it actually says

Recall from the trunk

Retrieve what is already known before working something out again.

How

Run the recall, top 5, and read what comes back:

brain recall "$ARGUMENTS"

If brain is not on the PATH, the plugin ships it — call it directly: "${CLAUDE_PLUGIN_ROOT}/bin/brain" recall "$ARGUMENTS".

Each result gives a score, a note name and a path relative to the trunk (~/.c-brain/trunk). Open the ones above the noise floor and actually read them — the ranking is lexical, so it tells you where to look, never what is true.

Then

  • Say what the notes establish, and cite each one by its path so the user can check you.
  • Say plainly when nothing relevant came back. A confident answer assembled from three weakly-matching notes is worse than "the trunk has nothing on this" — it looks like memory and is not.
  • Never rewrite a note as a side effect of reading it.

Scale

Recall holds well to about a thousand notes and degrades past that (tests/recall_benchmark.py publishes the numbers). On a large trunk, prefer several narrow queries over one broad one.

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. 4d ago First seen · 39 lines · 71 tokens per session scan A 32366e15f75a

Subscribe to this mod's changes

recall is a skill published in the GitHub repository Yuno15-bb/c-brain (2 stars, last pushed 10d ago), licensed Apache-2.0. It adds 71 tokens to every session and 348 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 2026-08-31.

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