ds-lint

ds-lint is a skill for Claude Code from Dataslayer-AI/Marketing-skills. It costs 86 tokens per session (322 once invoked), scanned A, original, MIT.

An internal checker for Claude Code skill and agent instruction files. It verifies required metadata, allowed fields, tool declarations, file length, paths, and description quality.

In plain words
What is it for?
Linting skill and agent files, reporting failures and warnings, and highlighting the most important fixes without changing the files automatically.
Why use it?
It finds formatting and specification problems before invalid or low-quality instruction files are used.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: model in frontmatter; mentions Claude Code.

Part of the dataslayer-marketing-skills plugin — 10 skills, 4 agents shipped together

Good fit Linting skill and agent files, reporting failures and warnings, and highlighting the most important fixes without changing the files automatically.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dataslayer-ai/marketing-skills/ds-lint
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 Dataslayer-AI/Marketing-skills --skill ds-lint
Clone the repo
git clone --depth 1 https://github.com/Dataslayer-AI/Marketing-skills

Made for: Claude Code.

Or install dataslayer-marketing-skills, the plugin that ships this one along with the rest of its 10 skills, 4 agents.

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 ds-lint

README.md
[![agentmods](https://agentmods.dev/badge/skills/dataslayer-ai/marketing-skills/ds-lint/github.svg)](https://agentmods.dev/skills/dataslayer-ai/marketing-skills/ds-lint)
Your own site
<a href="https://agentmods.dev/skills/dataslayer-ai/marketing-skills/ds-lint"><img src="https://agentmods.dev/badge/skills/dataslayer-ai/marketing-skills/ds-lint/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 ds-lint

Your own site · 80×15
<a href="https://agentmods.dev/skills/dataslayer-ai/marketing-skills/ds-lint"><img src="https://agentmods.dev/badge/skills/dataslayer-ai/marketing-skills/ds-lint.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 86 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 322 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.
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 $0.00086 $0.00322
Opus 5 $0.00043 $0.00161
Sonnet 5 $0.00017 $0.00064
Haiku 4.5 $0.00009 $0.00032

Measured 11d ago against content hash b636d923a6c1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

ds-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 11d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/lint_skills.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/ds-lint/SKILL.md · 44 lines

What it actually says

Skill linter (ds-lint)

You are a QA tool for Claude Code skills. Your job is to run the linter script and present the results clearly.

Process

  1. Run the linter:
python "${CLAUDE_SKILL_DIR}/scripts/lint_skills.py" "${CLAUDE_SKILL_DIR}/../.."
  1. Present the results to the user as-is. Do not reformat or summarize — the linter output is already structured.

  2. If there are errors (FAIL status), list the top 3 most critical fixes and offer to apply them.

  3. If there are only warnings, explain which ones are worth fixing and which are acceptable trade-offs.

Rules

  • Never modify skill files without the user's explicit approval.
  • If the linter script itself fails (import error, etc.), fix the script issue first and re-run.
  • Write in the same language the user is using.
Files

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.

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. 11d ago First seen · 44 lines · 86 tokens per session scan A b636d923a6c1

Subscribe to this mod's changes

ds-lint is a skill published in the GitHub repository Dataslayer-AI/Marketing-skills (22 stars, last pushed 5mo ago), licensed MIT. It adds 86 tokens to every session and 322 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 2026-08-30.

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