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Advanced TypeScript: types, library APIs and declarations v1.0.0

Use this resource to design a library API or advanced types in TypeScript 5.x

New

  • 424 downloads
  • 140 likes
  • 168 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install advanced-typescript-types

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent designs public APIs and advanced types against 40 rules: recursive conditional types, infer, key remapping, variadic tuples, phantom-state builders and module augmentation. It also checks how declarations are published. You get types that guide the users of your library.

Mostly picked by

Updated November 2, 2026

Card for the “Advanced TypeScript: types, library APIs and declarations” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • references/: cards on builders, narrow API surfaces and overloads
  • references/: cards on declaration merging, module augmentation and .d.ts files

Good fit for

  • You publish a TypeScript library and want a safely typed API
  • An API client must derive its types from a Zod schema

Not for

    Tags

    • typescript
    • types
    • library
    • generics
    • declarations

    About

    You say

    “Build a typed query builder that refuses to run without a table set, using only types.”

    Card for the “Advanced TypeScript: types, library APIs and declarations” skill

    Skill published by pproenca under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to design a library API or advanced types in TypeScript 5.x
    3. Review and adjust the result

    Content preview

    Files

    • AGENTS.md12.1 KB
    • assets/templates/_template.md1.1 KB
    • LICENSE1.1 KB
    • metadata.json1.9 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/_sections.md2.1 KB
    • references/decl-ambient-asset-modules.md3.6 KB
    • references/decl-authoring-d-ts-for-js.md4.2 KB
    • references/decl-declaration-merging.md4.2 KB
    • references/decl-exports-and-types-versions.md4.4 KB
    • references/decl-global-augmentation-discipline.md4.1 KB
    • references/decl-module-augmentation.md3.8 KB
    • references/dsl-fluent-builder-phantom-state.md3.4 KB
    • references/dsl-narrow-api-surface.md3.2 KB
    • references/dsl-overloads-vs-conditional-returns.md3.4 KB
    • references/dsl-route-param-inference.md2.8 KB
    • references/dsl-schema-first-inference.md3.2 KB
    • references/dsl-type-safe-object-paths.md3 KB
    • references/dsl-type-safe-query-builder.md3.2 KB
    • references/dsl-typed-event-emitter.md3.1 KB
    • references/impl-assert-never-exhaustive.md4.3 KB
    • references/impl-env-config-loader.md4.1 KB
    • references/impl-finite-state-machine.md4.4 KB
    • references/impl-phantom-feature-flags.md3.9 KB
    • references/impl-schema-derived-api-client.md4.4 KB
    • references/impl-state-discriminated-union.md3.9 KB
    • references/impl-tagged-result-type.md4.1 KB
    • references/impl-type-safe-form-builder.md3.8 KB
    • references/mod-const-type-params-overloads.md3.9 KB
    • references/mod-method-vs-property-bivariance.md3.9 KB
    • references/mod-noinfer-overload-disambiguation.md3.6 KB
    • references/mod-phantom-capability-tracking.md4 KB
    • references/mod-satisfies-branded-config.md4 KB
    • references/mod-stage-3-decorators.md4 KB
    • references/mod-using-disposal-ordering.md4 KB
    • references/mod-variance-debugging.md4.2 KB
    • references/tlp-distributive-conditional-control.md3.6 KB
    • references/tlp-hkt-emulation.md4 KB
    • references/tlp-infer-extends-constraints.md3 KB
    • references/tlp-key-remapping-as.md3 KB
    • references/tlp-recursive-conditional-types.md3.2 KB
    • references/tlp-tail-recursion-accumulator.md3.1 KB
    • references/tlp-template-literal-pattern-matching.md3.4 KB
    • references/tlp-type-level-string-algorithms.md3.5 KB
    • references/tlp-type-level-tests.md3.3 KB
    • references/tlp-variadic-tuple-types.md3.3 KB
    • SKILL.md9.6 KB

    Origin and licence

    Listed unmodified

    Author
    pproenca
    Source
    github.com/pproenca/dot-skills/tree/cf93c57cac89d6fc3e4194686000411567f5caf3/skills/.experimental/typescript-advanced-patterns
    Licence
    MIT

    Notice

    « typescript-advanced-patterns » (pproenca, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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