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node-csfd-api: Skill for Claude Code

.agent/skills/validate_changes/SKILL.md

Validate Changes is a skill for Claude Code, Codex from bartholomej/node-csfd-api. It costs 25 tokens per session (319 once invoked), scanned A, original, MIT.

A project-specific workflow for checking that scraper changes still build and work. A scraper is code that reads information from a website, here CSFD.cz.

In plain words
What is it for?
It helps run the build, tests, a live scraping demo, and an MCP server startup check after code changes.
Why use it?
It helps catch type errors, broken tests, website layout changes, and problems starting the project's MCP server.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

This is bartholomej/node-csfd-api's own configuration. It tells Claude Code and Codex how to work on node-csfd-api 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 node-csfd-api configures →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is node dist/bin/mcp-server.js.

not rated 66repo 4d ago A scan SkillSpector: pass 25 tokens original MIT
View source ↗ bartholomej/node-csfd-api
Reuse

Borrowing it

Nothing to install: this file belongs to bartholomej/node-csfd-api. 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/bartholomej/node-csfd-api/master/.agent/skills/validate_changes/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/bartholomej/node-csfd-api

Made for: Claude Code, Codex.

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 Changes

README.md
[![agentmods](https://agentmods.dev/badge/skills/bartholomej/node-csfd-api/validate_changes/github.svg)](https://agentmods.dev/skills/bartholomej/node-csfd-api/validate_changes)
Your own site
<a href="https://agentmods.dev/skills/bartholomej/node-csfd-api/validate_changes"><img src="https://agentmods.dev/badge/skills/bartholomej/node-csfd-api/validate_changes/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 Changes

Your own site · 80×15
<a href="https://agentmods.dev/skills/bartholomej/node-csfd-api/validate_changes"><img src="https://agentmods.dev/badge/skills/bartholomej/node-csfd-api/validate_changes.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 319 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 $0.00025 $0.00319
Opus 5.5 $0.00010 $0.00128
Sonnet 5.5 $0.00005 $0.00064
Haiku 4.5 $0.00003 $0.00032

Measured 2mo ago against content hash 521fb0f0611a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Validate Changes 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.

.agent/skills/validate_changes/SKILL.md · 53 lines

What it actually says

Validate Changes

Since this project relies on scraping a 3rd party website (CSFD.cz), validation is crucial to ensure their DOM hasn't changed or our logic isn't broken.

1. Static Analysis & Build

Ensure that TypeScript compiles and the dual-build system works.

# Checks types and builds both 'server' and 'mcp-server' related outputs
yarn build

2. Unit & Integration Tests

Run the test suite. Note that some tests might hit the real CSFD website.

yarn test

3. Real-world Demo

The demo.ts file is a scratchpad for testing the actual scraper against current CSFD pages.

# Run the demo script
npm run demo

If the demo fails:

  1. Check your internet connection (CSFD might block generic IPs).
  2. Check if CSFD changed their DOM layout.
  3. Verify User-Agent headers in src/fetchers/fetcher.ts.

4. MCP Server Check

If you modified mcp-server/, verify it builds and starts.

# Build specific to MCP
yarn build:mcp

# Try to run it (it handles stdio, so it will just wait for input, but shouldn't crash immediately)
node dist/bin/mcp-server.js
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 · 53 lines · 25 tokens per session scan A 521fb0f0611a

Subscribe to this mod's changes

Validate Changes is a skill published in the GitHub repository bartholomej/node-csfd-api (66 stars, last pushed 4d ago), licensed MIT. It adds 25 tokens to every session and 319 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.

TestingTypeScriptcsfdcsfd-apijavascriptmovieratings
Related

Validate Changes compared with skills from other repositories

Validate Changes next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
Validate Changesbartholomej/node-csfd-apiSkill664d agoMITA25Claude Code, Codex
create-prprisma/ormSkill48kyesterdayApache-2.0A48Claude Code, Codex
publish-npm-versionprisma/ormSkill48kyesterdayApache-2.0A182Claude Code, Codex
contrib-prprisma/ormSkill48kyesterdayApache-2.0A65Claude Code, Codex
github-review-iterationprisma/ormSkill48kyesterdayApache-2.0A60Claude Code
review-implement-phaseprisma/ormSkill48kyesterdayApache-2.0A38Claude Code
angular-developerangular/angularSkill101kyesterdayMITA93Claude Code, Codex