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lazyslides: Skill for Claude Code

.claude/skills/validate/SKILL.md

validate is a skill for Claude Code from Chrisissorry/lazyslides. It costs 22 tokens per session (405 once invoked), scanned A, original, MIT.

A checker and repair guide for LazySlides presentation YAML, the text format used to describe a slide deck. It explains validation errors and warnings and can apply approved corrections.

In plain words
What is it for?
Use it to validate presentation files, understand what each problem means, and fix approved issues in the YAML.
Why use it?
It helps catch missing fields, invalid slide layouts, missing images, hidden slides, and mismatches between the stated and actual slide count.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

This is Chrisissorry/lazyslides's own configuration. It tells Claude Code how to work on lazyslides itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything lazyslides configures →

not rated 5repo 4mo ago A scan 22 tokens original MIT
View source ↗ Chrisissorry/lazyslides
Reuse

Borrowing it

Nothing to install: this file belongs to Chrisissorry/lazyslides. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/Chrisissorry/lazyslides/develop/.claude/skills/validate/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/Chrisissorry/lazyslides

Made for: Claude Code.

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 validate

README.md
[![agentmods](https://agentmods.dev/badge/skills/chrisissorry/lazyslides/validate/github.svg)](https://agentmods.dev/skills/chrisissorry/lazyslides/validate)
Your own site
<a href="https://agentmods.dev/skills/chrisissorry/lazyslides/validate"><img src="https://agentmods.dev/badge/skills/chrisissorry/lazyslides/validate/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 validate

Your own site · 80×15
<a href="https://agentmods.dev/skills/chrisissorry/lazyslides/validate"><img src="https://agentmods.dev/badge/skills/chrisissorry/lazyslides/validate.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 22 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 405 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 $0.00022 $0.00405
Opus 5.5 $0.00009 $0.00162
Sonnet 5.5 $0.00004 $0.00081
Haiku 4.5 $0.00002 $0.00040

Measured 2mo ago against content hash 8c94cc5352de, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

validate 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 2mo 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.

.claude/skills/validate/SKILL.md · 63 lines

What it actually says

Validate Presentations

You are helping the user validate their presentation YAML and fix any issues.

Step 1: Run Validation

pnpm run validate

Step 2: Interpret Results

Review the output and categorize issues:

Errors (must fix)

  • No valid YAML front matter — missing --- fences or malformed YAML
  • Missing required field — title or slides missing from frontmatter
  • Missing template field — a slide is missing the template: key
  • Wrong comparison format — comparison slides must use rows: with left/right pairs

Warnings (should fix)

  • Unknown template — template name doesn't match one of the 19 valid types
  • Missing title — slide has no title (except quote which doesn't need one)
  • Missing image — image path in YAML doesn't exist on disk
  • Hidden slide — possible slide definition commented out
  • Slide count mismatch — expected_slides doesn't match actual count

Step 3: Propose Fixes

For each error:

  1. Explain what's wrong in plain language
  2. Show the problematic YAML
  3. Propose the corrected YAML

For each warning:

  1. Explain the risk
  2. Suggest a fix or explain why it's safe to ignore

Step 4: Apply Fixes

After the user approves, apply the fixes and re-run validation:

pnpm run validate

Repeat until all errors are resolved.

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. 2mo ago First seen · 63 lines · 22 tokens per session scan A 8c94cc5352de

Subscribe to this mod's changes

validate is a skill published in the GitHub repository Chrisissorry/lazyslides (5 stars, last pushed 4mo ago), licensed MIT. It adds 22 tokens to every session and 405 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 2026-08-31.

Documents
Related

validate compared with skills from other repositories

validate next to 6 skills from other repositories
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validateChrisissorry/lazyslidesSkill54mo agoMITA22Claude Code
orbit-notionnexu-io/open-designSkill106kyesterdayApache-2.0A117Claude Code, Codex
instrument-data-to-allotropeanthropics/knowledge-work-pluginsSkill35k2d agoApache-2.0A123Claude Code
apify-youtube-transcript-scrapersickn33/agentic-awesome-skillsSkill49kyesterdayMITA48Claude Code
legal-holdanthropics/claude-for-legalSkill9.9k3d agoApache-2.0A68Claude Code
ppt-reviewOrkas-AI/OrkasSkill9.0kyesterdayMITA2Claude Code, Codex
feishuHmbown/CodeWhaleSkill41k5d agoMITA33Claude Code, Codex