knowledge-base

knowledge-base is a skill for Claude Code, Codex from jacobrask/claude-skills. It costs 73 tokens per session (686 once invoked), scanned A, original, MIT.

A personal knowledge-base manager for organizing saved links, notes, articles, and software references in a local knowledge folder. It can also use Safari tabs as a source of material.

In plain words
What is it for?
Use it to add or review knowledge-base entries, collect resources from Safari, summarize articles, and find saved material about a topic.
Why use it?
It helps turn scattered bookmarks and reading into organized, searchable resources grouped by topic or tool.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

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/jacobrask/claude-skills/knowledge-base
Any agent
npx skills add jacobrask/claude-skills --skill knowledge-base
Clone the repo
git clone --depth 1 https://github.com/jacobrask/claude-skills

Made for: Claude Code, Codex.

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 knowledge-base

README.md
[![agentmods](https://agentmods.dev/badge/skills/jacobrask/claude-skills/knowledge-base.svg)](https://agentmods.dev/skills/jacobrask/claude-skills/knowledge-base)
Your own site
<a href="https://agentmods.dev/skills/jacobrask/claude-skills/knowledge-base"><img src="https://agentmods.dev/badge/skills/jacobrask/claude-skills/knowledge-base.svg" alt="Measured on agentmods" height="20"></a>
Per session 73 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 686 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 5.1 $0.00073 $0.00686
Opus 5 $0.00036 $0.00343
Sonnet 5 $0.00015 $0.00137
Haiku 4.5 $0.00007 $0.00069

Measured 6d ago against content hash 2c386932bc9b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

knowledge-base 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 6d 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/knowledge-base/SKILL.md · 94 lines

How it starts

The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Knowledge Base

Topic-based collection of curated links and notes at ~/knowledge/.

Structure

~/knowledge/
├── _index.md          # Topic listing
├── _inbox.md          # Unprocessed items
├── topics/*.md        # Articles, concepts, best practices
├── tools/*.md         # Software, libraries (organized by use case)
└── archive/YYYY-MM/   # Full article content (link rot protection)

Entry Formats

Topics (articles/concepts):

**[Title](url)** — Author

1-2 paragraph summary focusing on core insights. Be extremely concise, disregard grammar.

Tools (software/libraries):

### [tool-name](url)

**Platform:** macOS / JavaScript / Web Service
**Install:** Installation method
**Use case:** Problem it solves

Brief summary of why it's useful and when to use it.

**Alternatives:** other-tool (tradeoff)

Workflow: Adding from Safari

  1. Get tabs: get_tabs.sh markdown or get_tabs.sh -w N markdown
  2. Process in batches of 8-10 to avoid context overflow
  3. For each batch:
    • Fetch content from URLs
    • Read existing topic files
    • Route to appropriate topic based on content
    • Archive substantial/unique articles to archive/YYYY-MM/
    • Items not fitting existing topics → _inbox.md
  4. Update _index.md when done

Routing

Articles/conceptstopics/:

  • Match by content, not just title
  • Prefer more specific topics
  • If unsure, add to _inbox.md with suggested topic
  • If topic >500 lines or >30 entries, ask user to split

Software/toolstools/ by use case:

  • Libraries, CLI tools, apps, web services all go here
  • Articles about tools → topics/
  • Create new use-case files as needed

Quality Control

When bulk adding, pause and ask if you encounter:

  • Out of place or low-quality content
  • GitHub repos/gists (ask for routing confirmation)
  • Failed fetches (summarize at end, ask if should add URL-only)

Archiving

Archive to archive/YYYY-MM/ when:

  • Substantial content (>500 words)
  • Likely to disappear (personal blogs)
  • Unique insights

Read the full file on GitHub · 94 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. 6d ago First seen · 94 lines · 73 tokens per session scan A 2c386932bc9b

Subscribe to this mod's changes

knowledge-base is a skill published in the GitHub repository jacobrask/claude-skills (5 stars, last pushed 8mo ago), licensed MIT. It adds 73 tokens to every session and 686 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.

Related

Other skills, from other repositories

media-ingest

Ingest video, audio, PDF, book, screenshot, and GitHub repo content into the brain. Multi-format handling with entity extraction and backlink propagation. Covers video-ingest, youtube-ingest, and book-ingest subtypes.

garrytan/gbrain · 52 tokens

mem0-oss-to-platform

Plan and then execute a migration of a project from the mem0 open-source / self-hosted SDK (the local Memory class) to the mem0 Platform / hosted / managed SDK (the MemoryClient class). Use this whenever a developer wants to move, switch, or migrate their mem0 usage off OSS/self-hosted to the hosted API — e.g.…

mem0ai/mem0 · 273 tokens

Cortex

Operate Cortex, the LifeOS memory system — the typed Knowledge Archive (People, Companies, Ideas, Research with typed related: links) plus recall of prior work sessions, ISAs, and conversations. Search, add, harvest, develop, ingest, distill, graph-navigate, recall. USE WHEN cortex, knowledge, knowledge base, search…

danielmiessler/LifeOS · 196 tokens

agent-memory

../../../engineering/agent-memory/skills/agent-memory/SKILL.md.

alirezarezvani/claude-skills · 0 tokens

memory

Use when the user asks to remember, recall, forget, update, search, or inspect durable OpenSquilla memory, including profile facts in USER.md and long-term notes in MEMORY.md or memory//.md.

opensquilla/opensquilla · 44 tokens

ha-data-stores

Map of Hope Agent's local data stores and safe read-only query workflow. Use when the user asks where Hope Agent stores data, wants to inspect sessions/messages/memory/logs/background jobs/knowledge indexes/settings, asks the model to query local app data, or debugging requires checking persisted state. Trigger…

shiwenwen/hope-agent · 115 tokens