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.
npx agentmods add skills/stjbrown/agent-knowledge/kb-lintnpx skills add stjbrown/agent-knowledge --skill kb-lintgit clone --depth 1 https://github.com/stjbrown/agent-knowledgeWrote 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.
[](https://agentmods.dev/skills/stjbrown/agent-knowledge/kb-lint)<a href="https://agentmods.dev/skills/stjbrown/agent-knowledge/kb-lint"><img src="https://agentmods.dev/badge/skills/stjbrown/agent-knowledge/kb-lint.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00022 | $0.01418 |
| Opus 5 | $0.00011 | $0.00709 |
| Sonnet 5 | $0.00004 | $0.00284 |
| Haiku 4.5 | $0.00002 | $0.00142 |
Grade A, and why
kb-lint 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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.
kb-lint — health-check the bundle
Keep a bundle trustworthy as it compounds by catching drift — the decay a
growing knowledge base accumulates. Two passes: a deterministic conformance check (mechanical,
scripted) and a drift audit (fuzzy, judgment). Run both; report findings by severity. With
fix, repair what is safe.
1. Conformance (deterministic)
For a bundle-wide format or lifecycle migration, first inventory active metadata with the same frontmatter-aware checker:
node "<skill-dir>/scripts/conformance.mjs" <bundle-dir> --inventory --json
The inventory parses only each concept's leading YAML frontmatter and reports body # Citations
separately. Its observations include counts and exact paths for every active top-level key and
status value; legacy_citations counts citation sections, numbered items, separately defined
footnote sources, total source records, and common citation shapes; structured_sources counts the
postflight concepts, entries, and entries carrying resource. An absent observation means zero. Do
not use repository-wide grep to classify active metadata because prose and fenced examples can contain
inactive field names and lifecycle values. Resolve every reported frontmatter error before planning
from the counts.
Run the bundled checker against the target bundle (default knowledge/). It is a zero-dependency
Node script (node >=18); <skill-dir> is this skill's directory — ${CLAUDE_SKILL_DIR} under
Claude Code, or whatever path your host exposes for the skill:
node "<skill-dir>/scripts/conformance.mjs" <bundle-dir>
It reports ERROR for a hard SPEC §11 failure and warn for producer-profile defects in optional v0.2 fields, broken links, non-ISO log dates, and stale dates. Optional-family warnings never make the bundle non-conformant. Broken links are explicitly tolerated by §6.1.
Completion criterion: the checker has run and every ERROR it reported is listed for the report
(and fixed, if in fix mode).
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 4d ago First seen · 112 lines · 22 tokens per session scan A 690a9e5fed33
kb-lint is a skill published in the GitHub repository stjbrown/agent-knowledge (33 stars, last pushed 1mo ago), licensed MIT. It adds 22 tokens to every session and 1,418 once invoked, about $0.0001 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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