awesome-second-brain: Instructions file for Claude Code

CLAUDE.md

awesome-second-brain CLAUDE.md is an instructions file for Claude Code from superuser-pal/awesome-second-brain. It costs 2,653 tokens per session, scanned A, original, MIT.

Repository instructions for an Obsidian-based personal knowledge system, where notes, decisions, and work information are organized as a linked vault. Obsidian is a note-taking app that stores connected Markdown files.

In plain words
What is it for?
Use them when adding or editing notes, recording something to remember, reorganizing knowledge, or finding links between related notes in the vault.
Why use it?
They help an agent preserve the vault's structure and avoid losing information, including keeping note metadata, respecting configuration files, and recording memories in the intended topics.

Instructions file for Claude Code

Written for Claude Code: SessionStart hook event. Also seen: reads .claude/ paths; mentions subagents.

This is superuser-pal/awesome-second-brain's own configuration. It tells Claude Code how to work on awesome-second-brain itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything awesome-second-brain configures →

Reuse

Borrowing it

Nothing to install: this file belongs to superuser-pal/awesome-second-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/superuser-pal/awesome-second-brain/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/superuser-pal/awesome-second-brain

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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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.

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Per session 2,653 This file is loaded in full into every session.
When invoked 2,653 The same file — it is already loaded in full.
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 $0.02653 $0.02653
Opus 5.5 $0.01061 $0.01061
Sonnet 5.5 $0.00531 $0.00531
Haiku 4.5 $0.00265 $0.00265

Measured 2mo ago against content hash 3681022ee044, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

awesome-second-brain CLAUDE.md 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.

CLAUDE.md · 153 lines

How it starts

The opening of the file, as written. The whole thing — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Awesome Second Brain

Awesome Second Brain vault — Obsidian-based personal knowledge system for work notes, decisions, performance tracking, and Claude context.

Rules

  • Never modify .obsidian/ config files unless explicitly asked.
  • Preserve existing frontmatter when editing notes.
  • Git sync is handled by the user's preferred method (obsidian-git, manual commits, etc.) -- don't configure git hooks or auto-commit.
  • When asked to "remember" something, write to the relevant brain/ topic note with a link to context. Never create memory files in ~/.claude/ -- they are not version-controlled.
  • Prefer Obsidian CLI over filesystem when Obsidian is running.
  • Skills are in .claude/skills/. Load a skill's SKILL.md on demand when the relevant operation is needed — do not preload all skills.
  • Always check for and suggest connections between notes.
  • Every note must have a description field (~150 chars). Claude fills this automatically.
  • Zero data loss: when reorganizing, always use git mv (or your file manager if not using git). Never delete without explicit user confirmation.
  • North Star: Read brain/NORTH_STAR.md at session start. Reference it when suggesting priorities or trade-offs. Update it when the user signals a shift in goals.

Skills & Capabilities

This vault has obsidian-skills installed in .claude/skills/. Follow these skill conventions:

  • obsidian-markdown: Obsidian-flavored markdown -- wikilinks, embeds, callouts, properties. Always prefer [[wikilinks]] over markdown links.
  • obsidian-cli: CLI commands for vault operations when Obsidian is running.
  • json-canvas: Create .canvas files with nodes, edges, and visual layouts.
  • obsidian-bases: Create .base files with views, filters, and formulas. Bases core plugin is enabled.
  • defuddle: Extract clean markdown from web pages via defuddle parse <url> --md.
  • qmd: Semantic search across the vault via QMD. Use PROACTIVELY before reading files -- qmd query "..." for hybrid search, qmd search "..." for keyword, qmd vsearch "..." for semantic. Falls back to grep/glob if QMD not installed.
  • project-management: Create, track, and archive domain-scoped projects. Aggregates tasks from all sources into dashboards/TASKS.md with bidirectional sync.
  • daily-rituals: Structured daily and weekly planning cycle. Enhances /open-day and /close-day with daily notes in plan/. Adds /week-prep, /week-close (with synthesis), and /week-cycle.
  • create-agent: Create and validate Domain Agents — interactive, domain-bound agents for focused context work.
  • prompts: Search, promote, and demote atomic prompt pages. Dormant prompts live in docs/prompts/; promoted ones get a /prompts:<slug> command.
  • strategy: Search, promote, and demote reasoning strategy pages. Dormant strategies live in docs/strategies/; promoted ones get a /thinking:<slug> command.

Read the full file on GitHub · 153 lines

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. 2mo ago First seen · 153 lines · 2,653 tokens per session scan A 3681022ee044

Subscribe to this mod's changes

awesome-second-brain CLAUDE.md is an instructions file published in the GitHub repository superuser-pal/awesome-second-brain (16 stars, last pushed 6mo ago), licensed MIT. It adds 2,653 tokens to every session, about $0.0106 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.

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