How do I install the Foundation skill?

Run npx skillmds@latest add caglarbaranbora/foundation in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Foundation safe to use?

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Which AI agents work with Foundation?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Foundation free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Foundation?

caglarbaranbora (@caglarbaranbora) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Foundation by caglarbaranbora — Agent Skill

Name: Foundation
Author: caglarbaranbora

Foundation

Route Swift Foundation framework implementation tasks to the correct Knowledge Contracts -- date/time formatting, measurement and unit formatting, Codable encoding and custom conformance, and FileManager app sandbox directories. Use when working with DateFormatter, ISO8601DateFormatter, Date.FormatStyle, .formatted(), RelativeDateTimeFormatter, Measurement, .converted(to:), MeasurementFormatter, unitStyle, unitOptions, JSONEncoder, Codable, encode(to:), init(from:), CodingKeys, FileManager, Documents directory, Caches directory, Application Support directory, or isExcludedFromBackup. v1 is a curated, highest-usage subset of Foundation -- not an exhaustive API reference.

File contents

Foundation — Foundations Skill

Purpose

Route Swift Foundation framework implementation tasks to the minimum required Foundation Knowledge Contracts. v1 scope is a deliberately curated, highest-usage subset of four topics — not an exhaustive Foundation API reference.

Routing

Load only the contracts relevant to the task. All paths relative to knowledge/foundation/.

DateFormatter, ISO8601DateFormatter, Date.FormatStyle, .formatted(), RelativeDateTimeFormatter, or formatter-reuse performance -> date-time-formatting.md
Measurement, .converted(to:), MeasurementFormatter, unitStyle, or unitOptions -> measurement-and-unit-formatting.md
JSONEncoder, custom encode(to:)/init(from:) conformance, or CodingKeys for encoding -> codable-encoding-and-custom-conformance.md
FileManager, Documents/Caches/Application Support directories, safe file read/write, or isExcludedFromBackup -> filemanager-app-sandbox-directories.md

Never load more than the contracts relevant to the specific question.

Stop Conditions

Stop and report if the requested topic has no matching Knowledge Contract in knowledge/foundation/ — do not guess or fall back to general knowledge.

Unit-of-measure copy wording (spelling out vs. abbreviating, spacing, capitalization once a value is already display text) — owned by style-guide.
Network-response Codable decoding (JSONDecoder, DecodingError handling for fetched data) — owned by networking.
General String/Unicode text processing, NotificationCenter, the Result type, and GCD/DispatchQueue — Deferred; no domain owns them yet.
Locale/Bundle localization and translation workflow mechanics — owned by localization.
Combine — owned by combine.

---name: foundationdescription: Route Swift Foundation framework implementation tasks to the correct Knowledge Contracts -- date/time formatting, measurement and unit formatting, Codable encoding and custom conformance, and FileManager app sandbox directories. Use when working with DateFormatter, ISO8601DateFormatter, Date.FormatStyle, .formatted(), RelativeDateTimeFormatter, Measurement, .converted(to:), MeasurementFormatter, unitStyle, unitOptions, JSONEncoder, Codable, encode(to:), init(from:), CodingKeys, FileManager, Documents directory, Caches directory, Application Support directory, or isExcludedFromBackup. v1 is a curated, highest-usage subset of Foundation -- not an exhaustive API reference.---# Foundation — Foundations Skill## PurposeRoute Swift Foundation framework implementation tasks to the minimumrequired Foundation Knowledge Contracts. v1 scope is a deliberatelycurated, highest-usage subset of four topics — not an exhaustiveFoundation API reference.## RoutingLoad only the contracts relevant to the task. All paths relative toknowledge/foundation/.- `DateFormatter`, `ISO8601DateFormatter`, `Date.FormatStyle`, `.formatted()`, `RelativeDateTimeFormatter`, or formatter-reuse performance -> date-time-formatting.md- `Measurement`, `.converted(to:)`, `MeasurementFormatter`, `unitStyle`, or `unitOptions` -> measurement-and-unit-formatting.md- `JSONEncoder`, custom `encode(to:)`/`init(from:)` conformance, or `CodingKeys` for encoding -> codable-encoding-and-custom-conformance.md- `FileManager`, `Documents`/`Caches`/`Application Support` directories, safe file read/write, or `isExcludedFromBackup` -> filemanager-app-sandbox-directories.mdNever load more than the contracts relevant to the specific question.## Stop ConditionsStop and report if the requested topic has no matching Knowledge Contractin knowledge/foundation/ — do not guess or fall back to general knowledge.- Unit-of-measure copy wording (spelling out vs. abbreviating, spacing, capitalization once a value is already display text) — owned by `style-guide`.- Network-response `Codable` decoding (`JSONDecoder`, `DecodingError` handling for fetched data) — owned by `networking`.- General String/Unicode text processing, `NotificationCenter`, the `Result` type, and GCD/`DispatchQueue` — Deferred; no domain owns them yet.- Locale/Bundle localization and translation workflow mechanics — owned by `localization`.- Combine — owned by `combine`.

Frequently asked questions