javascript SKILL.md skillA
javascript from xobotyi/cc-foundry is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add xobotyi/cc-foundry/javascript@git:20261013.f344942Pins git:20261013.f344942 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- xobotyi/cc-foundry
- Path
plugins/javascript/skills/javascript/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261013.f344942, committed Oct 13, 2026
- First version recorded
- Sep 2, 2026
- Size
- 25,862 bytes
- Repository stars
- 23
- License
- MIT
Write and review JavaScript: declarations, equality and coercion, functions, objects, iteration, classes, async and promise semantics, ES modules, regular expressions, JSDoc typing, and the ECMAScript features a project's engine baseline permits.
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
**JavaScript fails by continuing.** A mismatched type is coerced, a missing property is `undefined`, a rejected promise nobody watched is a warning. None of it reports itself, so the discipline is to make a failure loud at the earliest point it can be seen. Three biases decide most calls: - **Prefer the construct that refuses over the one that converts** — `===` over `==`, `??` over `||`, `Number(s)` over `parseInt(s)`, a thrown error over a silent `undefined`. - **The declared engine baseline decides what may be written**, not the ECMAScript edition a feature belongs to. - **Reach for the built-in globals first.** A dependency earns its place by doing what `Intl`, `URL`, `structuredClone`, `AbortController`, and the iterator helpers do not. ## Language Edition Read the project's engine baseline before writing code: `engines` in `package.json`, `browserslist`, `target` and `lib` in `tsconfig.json` or `jsconfig.json`, `.nvmrc`, and the CI matrix. Where a transpiler stands between source and runtime, its target governs the output and the source may run ahead; where none does, the engine baseline's oldest engine governs the source. …
Read the whole file at its exact version.
How to install
mdr add xobotyi/cc-foundry/javascript@sha256:e78265aeceb70672The line at the top of this page pins the label git:20261013.f344942, 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_2vnxe74f2ogzm4sm)
0 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 2, 2026 and Oct 13, 2026, about one every 10 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261013.f344942 latest | 2026-10-13 | f344942 | 25,862 B | A | view · diff |
| git:20261013.fe5098c | 2026-10-13 | fe5098c | 25,626 B | A | view · diff |
| git:20260902.7b8c5d9 | 2026-09-02 | 7b8c5d9 | 25,026 B | A | view · diff |
| git:20260902.afae65c | 2026-09-02 | afae65c | 25,597 B | A | view · diff |
| git:20260902.c989b8d | 2026-09-02 | c989b8d | 24,840 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (25862 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 instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
xobotyi/cc-foundry · 23 stars · license MIT · pushed 2026-10-31 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_2vnxe74f2ogzm4sm GET https://markdownregistry.com/api/v1/resolve?ref=xobotyi/cc-foundry/javascript GET https://markdownregistry.com/api/v1/blob/e78265aeceb706725a804b76cd4a8e48837f2c7f4e799455604fc779a94ced7b
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.
More from xobotyi/cc-foundry
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