A quick journaling command that appends a timestamped activity entry to today’s Markdown file. If the file does not exist, it creates a minimal daily log first.

Use it to record accomplishments, research, decisions, ideas, or anything else you want to remember from the day.

It removes the friction of finding the correct date and formatting a short note by hand.

How Railly/agent-brain configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to Railly/agent-brain. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/Railly/agent-brain/main/.agents/skills/log/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/Railly/agent-brain

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/railly/agent-brain/log/github.svg)](https://agentmods.dev/skills/railly/agent-brain/log)

Your own site

<a href="https://agentmods.dev/skills/railly/agent-brain/log"><img src="https://agentmods.dev/badge/skills/railly/agent-brain/log/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/railly/agent-brain/log"><img src="https://agentmods.dev/badge/skills/railly/agent-brain/log.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 8 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 138 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.

Model	Per session	Once invoked
Fable 5.1	$0.00008	$0.00138
Opus 5.5	$0.00003	$0.00055
Sonnet 5.5	$0.00002	$0.00028
Haiku 4.5	$0.00001	$0.00014

Measured 2mo ago against content hash d117f7f6e1c4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

log 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 2mo 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.

.agents/skills/log/SKILL.md · 24 lines

What it actually says

Quick log to daily file: $ARGUMENTS

Get today's log path: 02_Journal/daily/$(date +%Y-%m-%d).md
If file doesn't exist, create with minimal template
Append entry with timestamp:

- [HH:MM] $ARGUMENTS

Confirm logged

Examples:

/log Learned about petgraph traversal patterns
/log Research: compared auth providers
/log Content idea: thread about X

No output verbosity. Just confirm: "Logged to YYYY-MM-DD.md"

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.

2mo ago First seen · 24 lines · 8 tokens per session scan A d117f7f6e1c4

Subscribe to this mod's changes

log is a skill published in the GitHub repository Railly/agent-brain (22 stars, last pushed 3mo ago), licensed MIT. It adds 8 tokens to every session and 138 once invoked, about $0.0000 per session on Opus 5.5. 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.

Productivity

log next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
logRailly/agent-brain	Skill	22	3mo ago	MIT	A	8	Claude Code
orbit-notionnexu-io/open-design	Skill	106k	yesterday	Apache-2.0	A	117	Claude Code, Codex
agentmailpaperclipai/paperclip	Skill	111k	yesterday	MIT	A	30	Claude Code, Codex
Cortexdanielmiessler/LifeOS	Skill	20k	yesterday	MIT	A	184	Claude Code
rowboat-spacesrowboatlabs/rowboat	Skill	18k	yesterday	Apache-2.0	A	60	Claude Code, Codex
feishuHmbown/CodeWhale	Skill	41k	5d ago	MIT	A	33	Claude Code, Codex
pinchtab-mcppinchtab/pinchtab	Skill	11k	10d ago	MIT	A	52	Claude Code, Codex

agent-brain: Skill for Claude Code