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Agent skill

Implement Feature

by tddworks in tddworks/SkillsManager

Guide for implementing features following architecture-first design, TDD, rich domain models, and Swift 6.2 patterns.

No licenceAuto-check passedMobile

Install Implement Feature

skills CLI
$ npx skills add tddworks/SkillsManager --skill implement-feature -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install tddworks/SkillsManager implement-feature --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/tddworks/SkillsManager.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/implement-feature .claude/skills/implement-feature && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
implement-feature
GitHub stars
169
Token cost
~2.6k tokens
SKILL.md length
433 words
Files
5 (incl. references)
Skills in repo
1
Repo updated
First seen
Licence
None found

At a glance

Guide for implementing features following architecture-first design, TDD, rich domain models, and Swift 6.2 patterns.

  • Adding new functionality to a Swift app
  • SKILL.md covers Workflow Overview, Phase 0: Architecture Design…, Core Principles and Architecture, plus 3 more sections
  • Calls swift
  • Creating domain models that follow users mental model

What it does

Implement Feature is an agent skill from tddworks/SkillsManager. Guide for implementing features following architecture-first design, TDD, rich domain models, and Swift 6.2 patterns. Use this skill when: (1) Adding new functionality to a Swift app (2) Creating domain models that follow user's mental model (3) Building SwiftUI views that consume domain models directly (4) User asks "how do I implement X" or "add feature Y" (5) Implementing any feature that spans Domain, Infrastructure, and App layers

Its SKILL.md is about 2.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `references/architecture-diagrams.md`, `references/domain-models.md` and `references/swift-observable.md`).

It sits in Mobile, covering iOS development and Test-driven development. It works with Swift and SwiftUI. The repository describes itself as: A macOS application for discovering, browsing, and installing skills for AI coding assistants. Manage skills for Claude Code and Codex from GitHub repositories or your local…

When your agent uses it

  • Adding new functionality to a Swift app
  • Creating domain models that follow users mental model
  • Building SwiftUI views that consume domain models directly
  • User asks how do I implement X

Example prompts

  • “how do I implement X”
  • “add feature Y”
  • “/implement-feature”

What it can do on your machine

Read from SKILL.md and the folder at commit 36615df. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • swift

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Implement Feature loads about 2.6k tokens when it runs, and up to ~13k if it reads all its reference files. Until then it costs about 114 tokens; SKILL.md has 433 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~114
When it runs · the whole SKILL.md, loaded when a task matches
~2.6k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~13k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 433 words (~2,562 tokens).

“Implement features using architecture-first design, TDD, rich domain models, and Swift 6.2 patterns.”

— opening of SKILL.md by tddworks
name
implement-feature

Read the full SKILL.md on GitHub

Files

SKILL.md and 4 other files (references) in .claude/skills/implement-feature of tddworks/SkillsManager.

  • SKILL.md
  • references/architecture-diagrams.md
  • references/domain-models.md
  • references/swift-observable.md
  • references/tdd-patterns.md

Open the folder on GitHubat commit 36615df

Compare with similar skills

Implement Feature next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Implement Feature compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Implement Feature this skilltddworks/SkillsManager169—~2.6kAutomated safety check: PassNone
Implement Featuretddworks/ClaudeBar1.5k—~4.1kAutomated safety check: PassApache-2.0
iOS Testingpproenca/dot-skills214—~2.1kAutomated safety check: PassMIT
Swiftui Expert SkillAFK-surf/OpenBridge4302 repos~3.9kAutomated safety check: PassMIT
macOS DevelopmentKartikLabhshetwar/better-shot2.4k2 repos~735Automated safety check: PassCustom licence
Swiftui AnimationAstraFoundry/KumoApp290—~4.1kAutomated safety check: PassAGPL-3.0

Similar skills

  • Implement Feature

    tddworks/ClaudeBar

    Guide for implementing features in ClaudeBar following architecture-first design, TDD, rich domain models, and Swift 6.2 patterns.

    1.5k GitHub stars~4.1k tokensUpdated today
    MobileAuto-check passed

  • iOS Testing

    pproenca/dot-skills

    Testing practices for iOS 26 / Swift 6.2 clinic modular MVVM-C applications.

    214 GitHub stars~2.1k tokensUpdated 1 mo ago
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  • Swiftui Expert Skill

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    Write, review, or improve SwiftUI code following best practices for state management, view composition, performance, modern APIs, Swift concurrency, and iOS 26+ Liquid Glass adoption.

    430 GitHub starsUsed in 2 repos~3.9k tokens
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  • macOS Development

    KartikLabhshetwar/better-shot

    Comprehensive macOS development guidance including Swift 6+, SwiftUI, SwiftData, architecture patterns, AppKit bridging, and macOS 26 Tahoe APIs.

    2.4k GitHub starsUsed in 2 repos~735 tokens
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  • Swiftui Animation

    AstraFoundry/KumoApp

    Implement, review, or improve SwiftUI animations and transitions.

    290 GitHub stars~4.1k tokensUpdated 4 mo ago
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  • Snapshot Tests

    microsoft/SwiftStreamingMarkdown

    Official

    Record and validate swift-snapshot-testing snapshots in the SwiftStreamingMarkdown package: regenerate reference PNGs, run snapshot tests, and diff failed snapshots.

    377 GitHub stars~2.2k tokensUpdated 12 days ago
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Works with

Categories

Questions about Implement Feature

What does Implement Feature do?

Guide for implementing features following architecture-first design, TDD, rich domain models, and Swift 6.2 patterns. Implement Feature is an agent skill from tddworks/SkillsManager.2 patterns.

When should I use Implement Feature?

Implement Feature fits situations like: adding new functionality to a Swift app; creating domain models that follow users mental model; building SwiftUI views that consume domain models directly; user asks how do I implement X.

How do I install Implement Feature in Claude Code?

Run `npx skills add tddworks/SkillsManager --skill implement-feature -a claude-code`. Or copy the skill folder (.claude/skills/implement-feature in tddworks/SkillsManager) into .claude/skills/implement-feature in your project. Claude Code loads it when a task matches its description.

How do I install Implement Feature in Codex?

Run `npx skills add tddworks/SkillsManager --skill implement-feature -a codex`. Or copy the skill folder (.claude/skills/implement-feature in tddworks/SkillsManager) into .agents/skills/implement-feature in your project. Codex loads it when a task matches its description.

Can I use Implement Feature in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add tddworks/SkillsManager --skill implement-feature -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/implement-feature, .gemini/skills/implement-feature, .github/skills/implement-feature and .opencode/skills/implement-feature in your project.

What does Implement Feature need to run?

Going by SKILL.md and its folder, Implement Feature needs the command-line tools its instructions call (swift).

Does Implement Feature access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Implement Feature safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Implement Feature use?

No licence was found for Implement Feature or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Implement Feature use?

About 2.6k tokens (SKILL.md is roughly 10k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 10k tokens, read only when the agent opens those files.

What are the alternatives to Implement Feature?

Skills that share tags, products or a category with Implement Feature: Implement Feature (tddworks/ClaudeBar, 1.5k stars), iOS Testing (pproenca/dot-skills, 214 stars), Swiftui Expert Skill (AFK-surf/OpenBridge, 430 stars) and macOS Development (KartikLabhshetwar/better-shot, 2.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Implement Feature?

tddworks (a GitHub organization) maintains it in tddworks/SkillsManager, which has 169 GitHub stars. The repository was last updated on May 28, 2026.

Source: tddworks/SkillsManager on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.