typescript-ops SKILL.md skillA
typescript-ops from 0xdarkmatter/claude-mods is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add 0xdarkmatter/claude-mods/typescript-ops@git:20260808.212b3baPins git:20260808.212b3ba in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- 0xdarkmatter/claude-mods
- Path
skills/typescript-ops/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260808.212b3ba, committed Aug 8, 2026
- First version recorded
- Apr 10, 2026
- Size
- 13,254 bytes
- Repository stars
- 68
- License
- MIT
TypeScript type system, generics, utility types, strict mode, and ecosystem patterns. Use for: typescript, ts, type, generic, utility type, Partial, Pick, Omit, Record, Exclude, Extract, ReturnType, Parameters, keyof, typeof, infer, mapped type, conditional type, template literal type, discriminated union, type guard, type assertion, type narrowing, tsconfig, strict mode, declaration file, zod, valibot.
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
# TypeScript Operations
Comprehensive TypeScript skill covering the type system, generics, and production patterns.
> Ecosystem facts verified as of 2026-08-08 (TypeScript 7, Zod 4, Valibot 1).
**Staleness check:** `python scripts/check-typescript-facts.py --offline` asserts the
catalogued version-bearing facts (TypeScript major, zod, valibot) are still named in the
prose and the dated currency note above is present; run `--live` to confirm each package's
npm major still matches the documented major. Catalog: `assets/typescript-facts.json`.
## Type Narrowing Decision Tree
```
How to narrow a type?
│
├─ Primitive type check
│ └─ typeof: typeof x === "string"
│
├─ Instance check
│ └─ instanceof: x instanceof Date
│
├─ Property existence
│ └─ in: "email" in user
│
├─ Discriminated union
│ └─ switch on literal field: switch (event.type)
│
├─ Null/undefined check
│ └─ Truthiness: if (x) or if (x != null)
│
├─ Custom logic
│ └─ Type predicate: function isUser(x: unknown): x is User
│
└─ Assertion (you know better than TS)
└─ as: value as string (escape hatch, avoid when possible)
```
### Type Guard Example
```typescript
interface Dog { bark(): void; breed: string }
…Read the whole file at its exact version.
How to install
mdr add 0xdarkmatter/claude-mods/typescript-ops@sha256:6a0cca14a7581253The line at the top of this page pins the label git:20260808.212b3ba, 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_luxxqbj5mhuj2syt)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Apr 10, 2026 and Aug 8, 2026, about one every 30 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260808.212b3ba latest | 2026-08-08 | 212b3ba | 13,254 B | A | view · diff |
| git:20260808.85b373b | 2026-08-08 | 85b373b | 13,343 B | A | view · diff |
| git:20260705.09a0636 | 2026-07-05 | 09a0636 | 11,898 B | A | view · diff |
| git:20260705.a07d116 | 2026-07-05 | a07d116 | 9,191 B | A | view · diff |
| git:20260410.d221136 | 2026-04-10 | d221136 | 8,794 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 (13254 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
0xdarkmatter/claude-mods · 68 stars · license MIT · pushed 2026-10-14 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_luxxqbj5mhuj2syt GET https://markdownregistry.com/api/v1/resolve?ref=0xdarkmatter/claude-mods/typescript-ops GET https://markdownregistry.com/api/v1/blob/6a0cca14a7581253eec93c8a17f0073daccd03440edd99f310ab7428e6ba0afa
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.