kb-absorb

A guided migration helper that reviews CLAUDE.md and project documentation to find knowledge that can be organized into a knowledge base.

In plain words
What is it for?
Finding reusable knowledge in documentation, proposing where it belongs, and moving approved content into knowledge-base files with linked references.
Why use it?
It reduces the risk of losing useful project instructions while moving scattered documentation into a more organized system.

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/charlesjones-dev/claude-code-plugins-dev/kb-absorb
Any agent
npx skills add charlesjones-dev/claude-code-plugins-dev --skill kb-absorb
Clone the repo
git clone --depth 1 https://github.com/charlesjones-dev/claude-code-plugins-dev

Made for: Claude Code, Codex.

Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,158 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 $0.00033 $0.02158
Opus 5 $0.00016 $0.01079
Sonnet 5 $0.00007 $0.00432
Haiku 4.5 $0.00003 $0.00216

Measured 2d ago against content hash d5eec4770b8f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

kb-absorb 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 2d 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.

plugins/ai-knowledge/skills/kb-absorb/SKILL.md · 172 lines

How it starts

The opening of the file, as written. The whole thing — 172 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Knowledge Base Absorb

You are a knowledge base migration specialist. Your job is to analyze a project's existing documentation — CLAUDE.md, docs/ folders, and other markdown files — and help the user organize relevant content into the KB system. You must be careful not to move content that would degrade Claude Code's capabilities.

When a KB file has related entries in its frontmatter, you MUST also include a ## Related section at the end of the file body with the same references as [[wiki-links]]. This enables Obsidian graph view and link navigation. Always keep the related frontmatter AND the body ## Related section in sync. If there are no related files, omit the section entirely.

Date Resolution

Resolving today's date (cross-platform, CRITICAL): Never guess, infer, or increment prior dates. When this skill writes created / last-updated, resolve today's date once at the start of the write phase, then reuse that single value for every write. Try these commands in order and use the first that returns a YYYY-MM-DD string:

  • macOS / Linux / WSL / Git Bash (bash, zsh, sh): date +%Y-%m-%d
  • Windows PowerShell / pwsh: Get-Date -Format 'yyyy-MM-dd'
  • Windows cmd.exe: powershell -NoProfile -Command "Get-Date -Format 'yyyy-MM-dd'"
  • Portable fallback (Node or Python available): node -e "console.log(new Date().toISOString().slice(0,10))" or python -c "import datetime; print(datetime.date.today().isoformat())"

Only update last-updated when the file's content actually changed. If an edit would leave the file byte-identical, do not rewrite it or bump the date.

Instructions

CRITICAL: This command MUST NOT accept any arguments. Ignore any text provided after the command.

Phase 1: Discovery

Scan the project for existing documentation sources:

1a: Analyze CLAUDE.md
  1. Read the project's CLAUDE.md file.
  2. If no Knowledge Base section exists, inform the user they should run /kb-init first, then stop.
  3. Parse CLAUDE.md into logical sections. For each section, classify it as:
    • CORE — Essential for Claude Code's baseline behavior (e.g., repository overview, architecture descriptions, development workflow, build/test commands, git conventions, key conventions). These MUST stay in CLAUDE.md.
    • KB-CANDIDATE — Topic-specific knowledge that could live in a KB file and be loaded contextually (e.g., detailed rules for a specific package, API documentation, deployment procedures, technology-specific patterns, client/vendor-specific rules).
    • REDUNDANT — Content that duplicates what's already in KB files or is outdated.

Read the full file on GitHub · 172 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. 2d ago First seen · 172 lines · 33 tokens per session scan A d5eec4770b8f

Subscribe to this mod's changes

kb-absorb is a skill published in the GitHub repository charlesjones-dev/claude-code-plugins-dev (34 stars, last pushed 1mo ago), licensed MIT. It adds 33 tokens to every session and 2,158 once invoked, about $0.0002 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.

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