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validate-file

validate-file is a skill for Claude Code from fubits1/svelte-skills. It costs 46 tokens per session (1,859 once invoked), scanned A, original, MIT.

A file-validation workflow that checks edited code and documentation with the appropriate linting and tests.

In plain words
What is it for?
Use it after editing Svelte, TypeScript, JavaScript, Markdown, or story files to run the required checks and fix reported errors.
Why use it?
It catches formatting, type, accessibility, and other code-quality problems immediately after files are changed.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Part of the frontend plugin — 13 skills shipped together

not rated 10repo changed 11d ago A scan 46 tokens original MIT

Good fit Use it after editing Svelte, TypeScript, JavaScript, Markdown, or story files to run the required checks and fix reported errors.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/fubits1/svelte-skills/validate-file
View source ↗ fubits1/svelte-skills
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 fubits1/svelte-skills --skill validate-file
Clone the repo
git clone --depth 1 https://github.com/fubits1/svelte-skills

Made for: Claude Code.

Or install frontend, the plugin that ships this one along with the rest of its 13 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 validate-file

README.md
[![agentmods](https://agentmods.dev/badge/skills/fubits1/svelte-skills/validate-file/github.svg)](https://agentmods.dev/skills/fubits1/svelte-skills/validate-file)
Your own site
<a href="https://agentmods.dev/skills/fubits1/svelte-skills/validate-file"><img src="https://agentmods.dev/badge/skills/fubits1/svelte-skills/validate-file/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-file

Your own site · 80×15
<a href="https://agentmods.dev/skills/fubits1/svelte-skills/validate-file"><img src="https://agentmods.dev/badge/skills/fubits1/svelte-skills/validate-file.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,859 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 $0.00046 $0.01859
Opus 5.5 $0.00018 $0.00744
Sonnet 5.5 $0.00009 $0.00372
Haiku 4.5 $0.00005 $0.00186

Measured 11d ago against content hash dabaf170dd60, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

validate-file 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.

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/frontend/skills/validate-file/SKILL.md · 102 lines

How it starts

The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Validate File

Run the correct validation for every file you edited OR have been prompted to review. No exceptions.

Code style compliance

Before and during validation, apply the rules from these skills:

  • frontend:code-style: applies to ALL files (variable naming, braces, data attributes)
  • svelte-5:code-style-svelte: applies to .svelte and .svelte.ts/.svelte.js files
  • frontend:comments: applies to every comment you added, changed or deleted, and protects the existing comments in the files you edited
  • frontend:editing: applies to every edit (types, lint and TypeScript directives, refactors)

Hard rules

  • NEVER use any. Type it properly. If the type doesn't exist, create a local type or import the right one
  • NEVER use one of the directives frontend:editing lists outside its rule. Bare disables are cheating.
  • Fix ALL lint errors in the file: not just the ones you introduced. If you touch a file and lint reports errors, fix them. No "pre-existing" excuses

When to run

After EVERY file edit. Not at the end of a batch, after EACH edit. If you edited 3 files, you validate 3 times (or group by tool).

What to run

Batch-lint multiple files

To lint the .ts, .js and .svelte files currently staged in git, use pnpm lint:staged; it lints each staged file's working-tree content (unstaged edits included) and skips staged files outside the directory of the package.json that defines the script (in a monorepo package, files staged elsewhere in the repo). It runs only the lint:file chain documented below (its notes and the type-check caveats apply) and skips other file types (.md included), so, depending on what is staged, also run:

  • staged .test.ts files: pnpm lint:tests
  • staged .stories.svelte files: pnpm test:story <Pattern> (<Pattern>: a Vitest file filter, story-loop)
  • staged .tsx, .mts, .mjs, .jsx and other JS/TS files: pnpm lint:file <path>
  • staged .md, .yml and other types: the table below (lint:file runs no step on them and still reports a pass)

Read the full file on GitHub · 102 lines

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 Changed · +1 lines dabaf170dd60
  2. 12d ago Changed · -26 lines · +2 tokens per session 547fe9142b7d
  3. 2mo ago First seen · 127 lines · 44 tokens per session scan A 7c0d82b1199c

Subscribe to this mod's changes

validate-file is a skill published in the GitHub repository fubits1/svelte-skills (10 stars, last pushed 12d ago), licensed MIT. It adds 46 tokens to every session and 1,859 once invoked, about $0.0002 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.

Testing
Related

validate-file compared with skills from other repositories

validate-file next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
validate-filefubits1/svelte-skillsSkill1012d agoMITA46Claude Code
imagegenopenai/codexSkill133kyesterdayApache-2.0A113Codex
playwright-climicrosoft/playwrightSkill99kyesterdayApache-2.0A19Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginnersSkill79k4d agoMITA200Claude Code, Codex
systematic-debuggingobra/superpowersSkill313k3d agoMITA21Claude Code
next-cache-components-adoptionvercel/next.jsSkill143kyesterdayMITA95Claude Code
next-partial-prefetching-adoptionvercel/next.jsSkill143kyesterdayMITA103Claude Code