agent-carnet

A shared command-line notebook for saving, finding, and organizing short notes as Markdown files.

In plain words
What is it for?
Use it to save dependency fixes or other project notes, search note summaries, read notes, mark them as used, move them, or remove them.
Why use it?
It helps preserve decisions and findings between coding sessions instead of relying on conversation history. Notes can become stale and move to a trash folder automatically.

Skill for Claude CodeCodex

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/yamadashy/repomix/agent-carnet
Any agent
npx skills add yamadashy/repomix --skill agent-carnet
Clone the repo
git clone --depth 1 https://github.com/yamadashy/repomix

Made for: Claude Code, Codex.

Per session 67 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,145 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 $0.00067 $0.01145
Opus 5 $0.00034 $0.00573
Sonnet 5 $0.00013 $0.00229
Haiku 4.5 $0.00007 $0.00114

Measured yesterday against content hash 08285b0a349e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

agent-carnet 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 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.

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.

.agents/skills/agent-carnet/SKILL.md · 92 lines

How it starts

The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Carnet

A tiny CLI that gives you a shared markdown notebook on disk under .carnet/<category>/<slug>.md. Notes have a 30-day default lifespan that resets every time they are read or applied; useful ones survive, stale ones drift to .trash/ automatically.

Quick reference

# Save (always pass --summary and --agent claude-code)
echo "body content" | agent-carnet save deps/iconv-issue \
  --summary "iconv-esm v0.7 types broken — pin to v0.6" \
  --agent claude-code \
  --tags compat,esm

# Recall
agent-carnet find iconv               # search summaries (does NOT bump lifespan)
agent-carnet list                     # category-grouped overview, sorted by last_used
agent-carnet list --sort use_count    # most-applied notes first
agent-carnet show deps/iconv-issue    # read full content (bumps last_used; weak use signal)

# Mark as actually applied (strong use signal — bumps last_used + use_count)
agent-carnet used deps/iconv-issue

# Maintain
agent-carnet move <from> <to>
agent-carnet rm <path> --yes

When unsure of a subcommand's full flag set, run agent-carnet <command> -h (e.g. agent-carnet save -h, agent-carnet used -h). Each subcommand prints its own focused help — required arguments, options, and examples — without invoking filesystem operations.

When to save

Save proactively when you discover something worth preserving across sessions:

  • Research findings that took effort to derive
  • Non-obvious patterns / gotchas in the codebase
  • Solutions to tricky problems
  • Architectural decisions and the reasoning behind them
  • In-progress work that may be resumed later

When to recall

Before starting related work or when context might exist:

  • agent-carnet find <topic> — quick scan of summaries
  • agent-carnet list <category> — browse a folder
  • agent-carnet show <path> — actually read (resets last_used; only use when the content matters)

When to call used

Call agent-carnet used <path> after a carnet actually shaped your work:

  • You applied the recorded fix and it solved the bug.
  • You consulted the carnet before retrying a hypothesis and skipped a dead-end.
  • You used the canonical name from a vocab carnet in new code instead of inventing your own.

Read the full file on GitHub · 92 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. yesterday First seen · 92 lines · 67 tokens per session scan A 08285b0a349e

Subscribe to this mod's changes

agent-carnet is a skill published in the GitHub repository yamadashy/repomix (28,125 stars, last pushed 2d ago), licensed MIT. It adds 67 tokens to every session and 1,145 once invoked, about $0.0003 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.