typescript-javascript SKILL.md skillA
typescript-javascript from d-padmanabhan/agent-engineering-handbook is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add d-padmanabhan/agent-engineering-handbook/typescript-javascript@git:20260906.0766fecPins git:20260906.0766fec in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- d-padmanabhan/agent-engineering-handbook
- Path
skills/typescript-javascript/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260906.0766fec, committed Sep 6, 2026
- First version recorded
- Aug 12, 2026
- Size
- 8,350 bytes
- Repository stars
- 20
- License
- MIT
TypeScript and JavaScript development standards for modern web and Node.js development. Covers strict TypeScript configuration, type safety patterns, ESM modules, async/await, testing with Jest/Vitest, and security best practices. Use when working with .ts, .tsx, .js, .mjs files, package.json, tsconfig.json, or when asking about TypeScript/JavaScript best practices.
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 & JavaScript Development
Mandatory gates are owned by the JavaScript and TypeScript rule (`${HANDBOOK_ROOT}/rules/225-javascript-typescript.mdc`). This skill and its references own procedures and examples.
## Guiding Principles
1. **Type Safety**: Leverage strict mode, avoid `any`, use discriminated unions
2. **Explicit Over Implicit**: Prefer explicit types for clarity and maintainability
3. **Modern Defaults**: ESM, const/let, async/await, optional chaining
4. **Security First**: Never use `eval`, sanitize HTML, validate inputs
## Quick Reference
| Aspect | TypeScript | JavaScript |
|--------|------------|------------|
| **Package Manager** | `pnpm` preferred | `pnpm` preferred |
| **Module System** | ES Modules | ES Modules + `// @ts-check` |
| **Linting** | `eslint --max-warnings=0` | `eslint --max-warnings=0` |
| **Formatting** | Prettier | Prettier |
| **Types** | Strict mode | JSDoc types |
## Non-Negotiables
### NN-1: Validate at trust boundaries
…Read the whole file at its exact version.
How to install
mdr add d-padmanabhan/agent-engineering-handbook/typescript-javascript@sha256:ced3bfe44165a25fThe line at the top of this page pins the label git:20260906.0766fec, 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_sgisvxnhy3ff2zaa)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Aug 12, 2026 and Sep 6, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260906.0766fec latest | 2026-09-06 | 0766fec | 8,350 B | A | view · diff |
| git:20260819.d23bb73 | 2026-08-19 | d23bb73 | 8,088 B | A | view · diff |
| git:20260818.2fa29f0 | 2026-08-18 | 2fa29f0 | 8,288 B | A | view · diff |
| git:20260818.880e159 | 2026-08-18 | 880e159 | 7,508 B | A | view · diff |
| git:20260812.4160717 | 2026-08-12 | 4160717 | 7,083 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 (8350 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
d-padmanabhan/agent-engineering-handbook · 20 stars · license MIT · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_sgisvxnhy3ff2zaa GET https://markdownregistry.com/api/v1/resolve?ref=d-padmanabhan/agent-engineering-handbook/typescript-javascript GET https://markdownregistry.com/api/v1/blob/ced3bfe44165a25fb79ff4a81e858a70acdcfda44a0d97f8819370cd893304bb
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.