Agent skill

Ddd

Domain Driven Design guidance for TypeScript/Deno codebases.

Custom licenceAuto-check passedDevelopment

Install Ddd

skills CLI

$ npx skills add swamp-club/swamp --skill ddd -a claude-code

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

GitHub CLI

$ gh skill install swamp-club/swamp ddd --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/swamp-club/swamp.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/ddd .claude/skills/ddd && 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/

Paste into Claude Code

Install the "ddd" agent skill from https://github.com/swamp-club/swamp/tree/main/.claude/skills/ddd into .claude/skills/ddd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ddd", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/swamp-club/swamp/tree/main/.claude/skills/ddd

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add swamp-club/swamp --skill ddd -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install swamp-club/swamp ddd --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/swamp-club/swamp.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/ddd .agents/skills/ddd && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "ddd" agent skill from https://github.com/swamp-club/swamp/tree/main/.claude/skills/ddd into .agents/skills/ddd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ddd", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add swamp-club/swamp --skill ddd -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install swamp-club/swamp ddd --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/swamp-club/swamp.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/ddd .cursor/skills/ddd && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "ddd" agent skill from https://github.com/swamp-club/swamp/tree/main/.claude/skills/ddd into .cursor/skills/ddd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ddd", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/swamp-club/swamp.git --path .claude/skills/ddd

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add swamp-club/swamp --skill ddd -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install swamp-club/swamp ddd --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/swamp-club/swamp.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/ddd .gemini/skills/ddd && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "ddd" agent skill from https://github.com/swamp-club/swamp/tree/main/.claude/skills/ddd into .gemini/skills/ddd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ddd", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install swamp-club/swamp ddd

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add swamp-club/swamp --skill ddd -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/swamp-club/swamp.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/ddd .github/skills/ddd && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "ddd" agent skill from https://github.com/swamp-club/swamp/tree/main/.claude/skills/ddd into .github/skills/ddd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ddd", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add swamp-club/swamp --skill ddd -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install swamp-club/swamp ddd --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/swamp-club/swamp.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/ddd .opencode/skills/ddd && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "ddd" agent skill from https://github.com/swamp-club/swamp/tree/main/.claude/skills/ddd into .opencode/skills/ddd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ddd", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: ddd
GitHub stars: 646
Token cost: ~1.4k tokens
SKILL.md length: 416 words
Files: 3 (incl. references)
Skills in repo: 7
Repo updated: Oct 11, 2026
First seen: Oct 7, 2026
Licence: Custom licence

At a glance

Domain Driven Design guidance for TypeScript/Deno codebases.

All code changes to ensure domain model consistency
SKILL.md covers Building Block Selection, TypeScript Patterns, Ubiquitous Language and Testing by Building Block, plus 1 more section
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Tasks that involve Domain-driven design

What it does

Ddd is an agent skill from swamp-club/swamp. Domain Driven Design guidance for TypeScript/Deno codebases. Apply when writing or modifying code to choose appropriate DDD building blocks (entities, value objects, aggregates, domain services, repositories) and maintain ubiquitous language. Triggers on all code changes to ensure domain model consistency.

Its SKILL.md is about 1.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including reference files (for example `references/patterns.md` and `references/testing.md`).

It sits in Development, covering Domain-driven design. It works with TypeScript and Deno. The repository describes itself as: Stinemates, Watson, Adam, Mahir, Paul.

When your agent uses it

All code changes to ensure domain model consistency
Tasks that involve Domain-driven design

Example prompts

“/ddd”

What it can do on your machine

Read from SKILL.md and the folder at commit 1b5a295. 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
No scripts in the folder and no shell commands in SKILL.md.
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

Ddd loads about 1.4k tokens when it runs, and up to ~4.6k if it reads all its reference files. Until then it costs about 78 tokens; SKILL.md has 416 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~78
When it runs · the whole SKILL.md, loaded when a task matches: ~1.4k
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~4.6k

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 416 words (~1,442 tokens).

“Apply these patterns when implementing domain logic in TypeScript/Deno.”

— opening of SKILL.md by swamp-club, Custom licence

name: ddd

Read the full SKILL.md on GitHub

Files

SKILL.md and 2 other files (references) in .claude/skills/ddd of swamp-club/swamp.

SKILL.md
references/patterns.md
references/testing.md

Open the folder on GitHubat commit 1b5a295

Compare with similar skills

Ddd 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.

Ddd compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Ddd this skillswamp-club/swamp	646	—	~1.4k	Automated safety check: Pass	Custom licence	today
Evolutionary Modular Architecturetech-leads-club/agent-skills	7k	—	~3.7k	Automated safety check: Pass	CC-BY-4.0	yesterday
TS SDK Authormindfold-ai/Trellis	15k	—	~6.1k	Automated safety check: Pass	MIT	11 days ago
Deno Scriptcataclysmbn/Cataclysm-BN	1.3k	—	~1.8k	Automated safety check: Pass	Custom licence	today
evlog Framework Integrationevloghq/evlog	1.9k	—	~5k	Automated safety check: Notes	MIT	today
Deno Runtime and Package Managerdenoland/skills	100	—	~2.7k	Automated safety check: Pass	MIT	2 mo ago

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Evolutionary Modular Architecture
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7k GitHub stars~3.7k tokensUpdated yesterday
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Questions about Ddd

What does Ddd do?

Domain Driven Design guidance for TypeScript/Deno codebases. Ddd is an agent skill from swamp-club/swamp. Domain Driven Design guidance for TypeScript/Deno codebases.

When should I use Ddd?

Ddd fits situations like: all code changes to ensure domain model consistency; tasks that involve Domain-driven design.

How do I install Ddd in Claude Code?

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

How do I install Ddd in Codex?

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

Can I use Ddd 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 swamp-club/swamp --skill ddd -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/ddd, .gemini/skills/ddd, .github/skills/ddd and .opencode/skills/ddd in your project.

What does Ddd need to run?

SKILL.md names no scripts, command-line tools or credentials: Ddd is instructions for the agent only.

Does Ddd 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 Ddd 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 Ddd use?

Ddd has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Ddd use?

About 1.4k tokens (SKILL.md is roughly 5.8k 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 3.2k tokens, read only when the agent opens those files.

What are the alternatives to Ddd?

Skills that share tags, products or a category with Ddd: Evolutionary Modular Architecture (tech-leads-club/agent-skills, 7k stars), TS SDK Author (mindfold-ai/Trellis, 15k stars), Deno Script (cataclysmbn/Cataclysm-BN, 1.3k stars) and evlog Framework Integration (evloghq/evlog, 1.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Ddd?

swamp-club (a GitHub organization) maintains it in swamp-club/swamp, which has 646 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on October 11, 2026.

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

Ddd

Install Ddd

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

Evolutionary Modular Architecture

TS SDK Author

Deno Script

evlog Framework Integration

Deno Runtime and Package Manager

Deno Sandbox SDK

More from swamp-club/swamp

GitHub PR

Swamp

Swamp Getting Started

Terminal Output

Issue Lifecycle

Jujutsu

Questions about Ddd

Install Ddd

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

More from swamp-club/swamp

Related

Questions about Ddd