validate-env SKILL.md skillB
validate-env from velimirmueller/lab-claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add velimirmueller/lab-claude-skills/validate-env@git:20261009.d58ee01Pins git:20261009.d58ee01 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- velimirmueller/lab-claude-skills
- Path
skills/frontend/validate-env/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261009.d58ee01, committed Oct 9, 2026
- First version recorded
- Jun 8, 2026
- Size
- 4,973 bytes
- Repository stars
- 5
- License
- MIT
Use when a frontend project reads import.meta.env - parses it once with a Zod schema at startup, fails fast with a readable message, and exports a typed env object the seams import instead of raw reads.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Validate Env ## 1. Audit current state ```bash ls src/libs/env.ts .env.example .env.test .claude/stack-profile.md 2>/dev/null grep -rn "import.meta.env.VITE_" src/ 2>/dev/null | head # raw, unvalidated reads to migrate grep -n '"zod"' package.json ``` Read `.claude/stack-profile.md` if present: `package_manager` replaces `pnpm` below; `frontend.meta` of `nuxt` or `next` means this skill does not apply (their env comes from `runtimeConfig` / `NEXT_PUBLIC_*`, validated in their own config); say so and stop. A missing `VITE_API_URL` today fails *silently at runtime* (the `fetcher` falls back to `''` and every request hits the page origin). This skill turns that into a startup error. ## 2. Decide what to do - No `env.ts` → create it (steps 4–6) and migrate raw reads (step 6). - `env.ts` exists → confirm the schema covers every `VITE_*` the app reads. - The app reads **no** `VITE_*` variable yet → exit; add the skill with the first one. ## 3. Detect framework None needed: Vite exposes `import.meta.env` the same way to React and Vue. ## 4. Install (if needed) ```bash pnpm add zod ``` Zod 4 (`z.url()`, `z.prettifyError()`). Zod 3 projects: keep their API, do not mix. …
Read the whole file at its exact version.
How to install
mdr add velimirmueller/lab-claude-skills/validate-env@sha256:89d694485a3e2f03The line at the top of this page pins the label git:20261009.d58ee01, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_skyw4eivh7qydu3g)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Jun 8, 2026 and Oct 9, 2026, about one every 41 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261009.d58ee01 latest | 2026-10-09 | d58ee01 | 4,973 B | B | view · diff |
| git:20261009.0ae007b | 2026-10-09 | 0ae007b | 4,626 B | B | view · diff |
| git:20261002.7b23599 | 2026-10-02 | 7b23599 | 3,115 B | B | view · diff |
| git:20260608.8cf5ea0 | 2026-06-08 | 8cf5ea0 | 3,119 B | B | view |
Audit of the latest version
- fail: No instruction to read or print local credentials (matched: read `import.meta.env)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4973 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
velimirmueller/lab-claude-skills · 5 stars · license MIT · pushed 2026-10-12 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_skyw4eivh7qydu3g GET https://markdownregistry.com/api/v1/resolve?ref=velimirmueller/lab-claude-skills/validate-env GET https://markdownregistry.com/api/v1/blob/89d694485a3e2f03663ccbdc10429ca0ffd507eb046d392ad7b1d61e2aa42d1e
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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