typescript-advanced-utility-types SKILL.md skillA
typescript-advanced-utility-types from pantheon-org/tekhne is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add pantheon-org/tekhne/typescript-advanced-utility-types@git:20260923.7852cb4Pins git:20260923.7852cb4 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- pantheon-org/tekhne
- Path
skills/development/typescript-advanced/utility-types/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260923.7852cb4, committed Sep 23, 2026
- Size
- 6,027 bytes
- Repository stars
- 10
- License
- MIT
TypeScript's built-in utility types and how to build custom ones — Partial/Required, Pick/Omit, Readonly/Record, Extract/Exclude, NonNullable/Awaited, ReturnType/Parameters/ConstructorParameters/InstanceType, key remapping with `as` in mapped types, and hand-rolled custom mapped types. Use when picking the right built-in utility type instead of hand-writing one, extracting a function's parameter or return type, filtering a union with Extract/Exclude, or remapping object keys.
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 Utility Types The standard library of type transformations: which built-in utility type fits a given shape change, and how to build a custom one when none does. ## Mindset Reach for a built-in utility type before writing a custom one — `Partial<T>`, `Pick<T, K>`, `ReturnType<typeof fn>` and their relatives cover the overwhelming majority of shape transformations, and a hand-rolled equivalent is one more thing to keep in sync with the type it derives from. When a built-in genuinely doesn't fit (a transform needs to recurse into nested objects, or apply a key-by-key rename), build the custom version as a mapped type over the real source type rather than a parallel interface maintained by hand. Combine utilities rather than inventing a new named type for every combination: `Partial<Pick<T, K>>` is more honest about what it does than a bespoke `PartialSubset<T, K>` that hides the same composition behind a name. ## When to Apply Use this skill when: - Making some or all properties of a type optional or required (`Partial`, `Required`) - Selecting or excluding specific properties (`Pick`, `Omit`) …
Read the whole file at its exact version.
How to install
mdr add pantheon-org/tekhne/typescript-advanced-utility-types@sha256:b2545019a957a62cThe line at the top of this page pins the label git:20260923.7852cb4, 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_j5uuljlkskehriff)
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Versions
The registry has recorded 1 version of this file, committed on Sep 23, 2026.
Audit of the latest version
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Source
pantheon-org/tekhne · 10 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_j5uuljlkskehriff GET https://markdownregistry.com/api/v1/resolve?ref=pantheon-org/tekhne/typescript-advanced-utility-types GET https://markdownregistry.com/api/v1/blob/b2545019a957a62c425dca61ab784c0fa2fd47b1fd8c63cdfda7ebd6bfcdf91d
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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.