kb-discover

kb-discover is a skill for Claude Code from charlesjones-dev/claude-code-plugins-dev. It costs 34 tokens per session (4,458 once invoked), scanned A, original, MIT.

A tool that reads source code to uncover project knowledge that was never written down, such as architecture, naming rules, API agreements, configuration formats, and testing practices. It records these findings as knowledge-base articles.

In plain words
What is it for?
Use it to document how the code works, preserve project conventions, and explain interfaces and configuration by examining the implementation.
Why use it?
It gives future developers useful guidance when the codebase lacks complete or reliable documentation.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter. Also seen: mentions CLAUDE.md; names the AskUserQuestion tool; mentions Claude Code.

Part of the ai-knowledge plugin — 17 skills shipped together

Good fit Use it to document how the code works, preserve project conventions, and explain interfaces and configuration by examining the implementation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/charlesjones-dev/claude-code-plugins-dev/kb-discover
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.

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

Made for: Claude Code.

Or install ai-knowledge, the plugin that ships this one along with the rest of its 17 skills.

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 kb-discover

README.md
[![agentmods](https://agentmods.dev/badge/skills/charlesjones-dev/claude-code-plugins-dev/kb-discover/github.svg)](https://agentmods.dev/skills/charlesjones-dev/claude-code-plugins-dev/kb-discover)
Your own site
<a href="https://agentmods.dev/skills/charlesjones-dev/claude-code-plugins-dev/kb-discover"><img src="https://agentmods.dev/badge/skills/charlesjones-dev/claude-code-plugins-dev/kb-discover/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.

agentmods 80×15 button for kb-discover

Your own site · 80×15
<a href="https://agentmods.dev/skills/charlesjones-dev/claude-code-plugins-dev/kb-discover"><img src="https://agentmods.dev/badge/skills/charlesjones-dev/claude-code-plugins-dev/kb-discover.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,458 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00034 $0.04458
Opus 5.5 $0.00014 $0.01783
Sonnet 5.5 $0.00007 $0.00892
Haiku 4.5 $0.00003 $0.00446

Measured 10d ago against content hash d4b1db653af2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

kb-discover 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 10d 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-discover/SKILL.md · 370 lines

How it starts

The opening of the file, as written. The whole thing — 370 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Knowledge Base Discover

You are a codebase knowledge archaeologist. Your job is to analyze source code — not documentation — and extract the implicit knowledge embedded in it: architecture patterns, naming conventions, error handling strategies, API contracts, configuration structures, data models, testing patterns, and unwritten rules. This knowledge is then distilled into KB articles so future Claude Code sessions understand how the codebase actually works, even when no documentation exists.

This fills a gap the other KB skills don't cover:

  • /kb-absorb and /kb-ingest work with existing markdown documentation
  • /kb-harvest pulls from external docs and URLs
  • /kb-discover mines the source code itself for knowledge that was never written down

Frontmatter Schema

Every KB file MUST have valid YAML frontmatter:

---
tags: [architecture, api, conventions]     # Required: lowercase tags for discovery
related: [[other-kb-file]]                 # Optional: cross-references to related KB files
created: YYYY-MM-DD                        # Required: date created
last-updated: YYYY-MM-DD                   # Required: date last modified
pinned: false                              # Optional: true = always loaded. Default false
scope:                                     # Optional: glob pattern(s) for auto-matching. String or array.
  - "src/api/**"
  - "src/middleware/**"
discovered-from: "src/api/, src/models/"   # Required for discovered content: directories/files analyzed
---

The discovered-from field tracks which parts of the codebase were analyzed to produce the KB entry. This enables re-discovery if the codebase evolves significantly.

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:

Read the full file on GitHub · 370 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. 10d ago Changed d4b1db653af2
  2. 1mo ago First seen · 370 lines · 34 tokens per session scan A 1fc6cf73e6ab

Subscribe to this mod's changes

kb-discover is a skill published in the GitHub repository charlesjones-dev/claude-code-plugins-dev (35 stars, last pushed 6d ago), licensed MIT. It adds 34 tokens to every session and 4,458 once invoked, about $0.0001 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.