validate-file

validate-file is a skill for Claude Code from fubits1/svelte-skills. It costs 44 tokens per session (1,348 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

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
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 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,348 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 $0.00044 $0.01348
Opus 5 $0.00022 $0.00674
Sonnet 5 $0.00009 $0.00270
Haiku 4.5 $0.00004 $0.00135

Measured 9d ago against content hash 7c0d82b1199c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, 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 9d 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 · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 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

Hard rules

  • NEVER use any. Type it properly. If the type doesn't exist, create a local type or import the right one.
  • NEVER add eslint-disable without a FIXME or TODO. Every disable must explain what needs to be fixed and why it can't be fixed now. 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 every file currently staged in git, use pnpm lint:staged. To also include commits ahead of the upstream branch (or, when no upstream is set, commits not yet on any remote), use pnpm lint:staged --committed — useful right before pushing.

lint:staged calls into the same lint-file chain documented below, so all the per-file rules still apply.

Lint single files

File type Command Notes
.svelte, .ts, .js pnpm lint:file <path> [path2...] Runs eslint + oxlint + tsgo + svelte-check + knip
.stories.svelte pnpm lint:file <path> AND pnpm test:story <Pattern> Both. Lint AND test.
.test.ts, .spec.ts pnpm lint:tests Lints all test files
.md npx markdownlint-cli <path> Fix all errors before done
.yml/.yaml (CI) Simulate with CI=true GITHUB_ACTIONS=true locally Never guess at CI behavior
vite.config.ts npx tsgo -p tsconfig.node.json --noEmit Separate tsconfig, pnpm check won't catch it

Read the full file on GitHub · 127 lines

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. 9d 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 1mo ago), licensed MIT. It adds 44 tokens to every session and 1,348 once invoked, about $0.0002 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 2026-08-31.

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