Clean Architecture
giuseppe-trisciuoglio/developer-kit
Provides implementation patterns for Clean Architecture, Hexagonal Architecture (Ports & Adapters), and Domain-Driven Design in PHP 8.3+ with Symfony 7.x.
DDD architecture knowledge base. An agent skill from dykyi-roman/awesome-claude-code.
Install Ddd Knowledge
$ npx skills add dykyi-roman/awesome-claude-code --skill ddd-knowledge -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install dykyi-roman/awesome-claude-code ddd-knowledge --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/dykyi-roman/awesome-claude-code.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/ddd-knowledge .claude/skills/ddd-knowledge && rm -rf skills-srcUse ~/.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/
Install the "ddd-knowledge" agent skill from https://github.com/dykyi-roman/awesome-claude-code/tree/master/skills/ddd-knowledge into .claude/skills/ddd-knowledge/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ddd-knowledge", 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 install https://github.com/dykyi-roman/awesome-claude-code/tree/master/skills/ddd-knowledgeType 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.
$ npx skills add dykyi-roman/awesome-claude-code --skill ddd-knowledge -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install dykyi-roman/awesome-claude-code ddd-knowledge --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dykyi-roman/awesome-claude-code.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/ddd-knowledge .agents/skills/ddd-knowledge && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "ddd-knowledge" agent skill from https://github.com/dykyi-roman/awesome-claude-code/tree/master/skills/ddd-knowledge into .agents/skills/ddd-knowledge/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ddd-knowledge", 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.
$ npx skills add dykyi-roman/awesome-claude-code --skill ddd-knowledge -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install dykyi-roman/awesome-claude-code ddd-knowledge --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dykyi-roman/awesome-claude-code.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/ddd-knowledge .cursor/skills/ddd-knowledge && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "ddd-knowledge" agent skill from https://github.com/dykyi-roman/awesome-claude-code/tree/master/skills/ddd-knowledge into .cursor/skills/ddd-knowledge/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ddd-knowledge", 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 https://github.com/dykyi-roman/awesome-claude-code.git --path skills/ddd-knowledge--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add dykyi-roman/awesome-claude-code --skill ddd-knowledge -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install dykyi-roman/awesome-claude-code ddd-knowledge --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dykyi-roman/awesome-claude-code.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/ddd-knowledge .gemini/skills/ddd-knowledge && rm -rf skills-srcUse ~/.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/
Install the "ddd-knowledge" agent skill from https://github.com/dykyi-roman/awesome-claude-code/tree/master/skills/ddd-knowledge into .gemini/skills/ddd-knowledge/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ddd-knowledge", 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.
$ gh skill install dykyi-roman/awesome-claude-code ddd-knowledgeInstalls 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).
$ npx skills add dykyi-roman/awesome-claude-code --skill ddd-knowledge -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/dykyi-roman/awesome-claude-code.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/ddd-knowledge .github/skills/ddd-knowledge && rm -rf skills-srcUse ~/.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/
Install the "ddd-knowledge" agent skill from https://github.com/dykyi-roman/awesome-claude-code/tree/master/skills/ddd-knowledge into .github/skills/ddd-knowledge/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ddd-knowledge", 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.
$ npx skills add dykyi-roman/awesome-claude-code --skill ddd-knowledge -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install dykyi-roman/awesome-claude-code ddd-knowledge --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dykyi-roman/awesome-claude-code.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/ddd-knowledge .opencode/skills/ddd-knowledge && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "ddd-knowledge" agent skill from https://github.com/dykyi-roman/awesome-claude-code/tree/master/skills/ddd-knowledge into .opencode/skills/ddd-knowledge/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ddd-knowledge", 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-knowledge- GitHub stars
- 103
- Token cost
- ~1k tokens
- SKILL.md length
- 278 words
- Files
- 8 (incl. references, assets)
- Skills in repo
- 11
- Repo updated
- First seen
- Licence
- MIT
At a glance
DDD architecture knowledge base. An agent skill from dykyi-roman/awesome-claude-code.
- Tasks that involve Domain-driven design
- SKILL.md covers Core Principles, Quick Checklists, Common Violations Quick… and PHP 8.4 DDD Patterns, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Ddd Knowledge is an agent skill from dykyi-roman/awesome-claude-code. DDD architecture knowledge base. Provides patterns, antipatterns, and PHP-specific guidelines for Domain-Driven Design audits.
Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 9 other files, including reference files and assets (for example `assets/report-template.md`, `references/antipatterns.md` and `references/application-patterns.md`).
It sits in Development, covering Domain-driven design. It works with PHP. The repository describes itself as: PHP Architecture Toolkit for Claude Code (DDD, CQRS, Event Sourcing, Hexagonal, Clean Architecture, SOLID, GRASP, PSR, Design Patterns, Testing, Documentation, Code Review). The licence is MIT.
When your agent uses it
- Tasks that involve Domain-driven design
Example prompts
- “/ddd-knowledge”
What it can do on your machine
Read from SKILL.md and the folder at commit 7e1fea8. 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 (its code samples are php).
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 Knowledge loads about 1k tokens when it runs, and up to ~16k if it reads all its reference files. Until then it costs about 35 tokens; SKILL.md has 278 words of instructions outside code blocks.
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
The full file from dykyi-roman/awesome-claude-code at commit 7e1fea8, republished under its MIT licence (© dykyi-roman). 278 words, ~1,046 tokens.
Download SKILL.mdSave it as
.claude/skills/ddd-knowledge/SKILL.md (or your agent's skills folder). This skill also uses 7 other files; get the full folder from GitHub.- name
- ddd-knowledge
- description
- DDD architecture knowledge base. Provides patterns, antipatterns, and PHP-specific guidelines for Domain-Driven Design audits.
DDD Knowledge Base
Quick reference for DDD architecture patterns and PHP implementation guidelines.
Core Principles
Layer Dependencies (Clean Architecture)
Presentation → Application → Domain ← Infrastructure
↓
Domain (center)Rule: Dependencies point INWARD. Domain has ZERO external dependencies.
Layer Responsibilities
| Layer | Contains | Depends On |
|---|---|---|
| Domain | Entities, Value Objects, Aggregates, Domain Services, Repository Interfaces, Domain Events | Nothing |
| Application | Use Cases, DTOs, Application Services | Domain |
| Infrastructure | Repository Implementations, External APIs, DB, Cache, Queue | Domain, Application |
| Presentation | Controllers, Actions, Request/Response, CLI | Application |
Quick Checklists
Domain Layer Checklist
- No framework imports (Doctrine, Eloquent, Symfony)
- Entities have behavior, not just data
- Value Objects for domain concepts (Email, Money, Id)
- Repository INTERFACES defined here
- Enums for fixed value sets
- Domain Events for side effects
- No
public function set*()methods
Application Layer Checklist
- UseCases orchestrate, don't decide
- DTOs for input/output
- No business logic (if/switch on domain state)
- Transaction boundaries here
- No HTTP/CLI concerns
Infrastructure Layer Checklist
- Implements Domain interfaces
- No business logic in repositories
- External service adapters
- Caching, queuing implementations
Presentation Layer Checklist
- Validates input
- Maps to DTOs
- Calls UseCase
- Formats response
- No business logic
Common Violations Quick Reference
| Violation | Where to Look | Severity |
|---|---|---|
use Doctrine\\ in Domain | Domain/*.php | Critical |
use Illuminate\\ in Domain | Domain/*.php | Critical |
use Infrastructure\\ in Domain | Domain/*.php | Critical |
| Only getters/setters in Entity | Domain/Entity/*.php | Warning |
=== 'pending' magic strings | Any PHP file | Warning |
public function set*() | Domain/Entity/*.php | Warning |
| Business logic in Controller | Presentation/*.php | Warning |
| Business logic in Repository | Infrastructure/*.php | Warning |
PHP 8.4 DDD Patterns
Value Object
final readonly class Email
{
public function __construct(
public string $value
) {
if (!filter_var($value, FILTER_VALIDATE_EMAIL)) {
throw new InvalidArgumentException('Invalid email');
}
}
public function equals(self $other): bool
{
return $this->value === $other->value;
}
}Entity with Behavior
final class Order
{
private OrderStatus $status;
public function __construct(
private readonly OrderId $id,
private readonly CustomerId $customerId
) {
$this->status = OrderStatus::Pending;
}
public function confirm(): void
{
if (!$this->status->canTransitionTo(OrderStatus::Confirmed)) {
throw new DomainException('Cannot confirm order');
}
$this->status = OrderStatus::Confirmed;
}
}Repository Interface
// Domain/Repository/OrderRepositoryInterface.php
interface OrderRepositoryInterface
{
public function findById(OrderId $id): ?Order;
public function save(Order $order): void;
}References
For detailed information, load these reference files:
references/layer-architecture.md— Detailed layer rules and boundariesreferences/domain-patterns.md— Entity, VO, Aggregate, Repository patternsreferences/application-patterns.md— UseCase, DTO, Command/Query patternsreferences/antipatterns.md— Common violations with detection patternsreferences/php-specific.md— PHP 8.4 specific implementations
Assets
assets/report-template.md— Structured audit report template
© dykyi-roman, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 7 other files (references, assets) in skills/ddd-knowledge of dykyi-roman/awesome-claude-code.
- SKILL.md
- assets/report-template.md
- references/antipatterns.md
- references/application-patterns.md
- references/domain-patterns.md
- references/generation-examples.md
- references/layer-architecture.md
- references/php-specific.md
Open the folder on GitHubat commit 7e1fea8
Compare with similar skills
Ddd Knowledge 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Ddd Knowledge this skilldykyi-roman/awesome-claude-code | 103 | — | ~1k | Automated safety check: Pass | MIT | |
| Clean Architecturegiuseppe-trisciuoglio/developer-kit | 356 | — | ~4.2k | Automated safety check: Notes | MIT | |
| Laravel Clean ArchitectureHoangNguyen0403/agent-skills-standard | 571 | — | ~913 | Automated safety check: Pass | MIT | |
| WooCommerce Code Reviewwoocommerce/woocommerce | 11k | 3 repos | ~1.1k | Automated safety check: Pass | Custom licence | |
| Domain Modelingfossasia/eventyay-interpretation | 1.6k | 31 repos | ~821 | Automated safety check: Pass | Apache-2.0 | |
| Skill Doli Code ReviewDolibarr/dolibarr | 7.7k | 1 repos | ~1.1k | Automated safety check: Pass | MIT |
Similar skills
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HoangNguyen0403/agent-skills-standard
Implement Domain-Driven Design with typed DTOs, repository interfaces, and single-responsibility Action classes in Laravel.
WooCommerce Code Review
woocommerce/woocommerce
Reviews WooCommerce code changes against the project's standards, flagging backend PHP architecture, naming, documentation, data integrity and testing violations.
Domain Modeling
fossasia/eventyay-interpretation
Build and sharpen a project's domain model. An agent skill from fossasia/eventyay-interpretation.
Skill Doli Code Review
Dolibarr/dolibarr
Reviews Dolibarr PHP code for compliance with coding standards and security best practices, and fixes identified issues.
Architecture Governance
zai-org/ZCode
Apply the repository's architecture policy to code changes by generating a bounded context package, checking module and layer boundaries, and reporting baseline-aware violations.
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Related
Works with
Categories
Questions about Ddd Knowledge
What does Ddd Knowledge do?
DDD architecture knowledge base. An agent skill from dykyi-roman/awesome-claude-code. Ddd Knowledge is an agent skill from dykyi-roman/awesome-claude-code. DDD architecture knowledge base.
When should I use Ddd Knowledge?
Ddd Knowledge fits situations like: tasks that involve Domain-driven design.
How do I install Ddd Knowledge in Claude Code?
Run `npx skills add dykyi-roman/awesome-claude-code --skill ddd-knowledge -a claude-code`. Or copy the skill folder (skills/ddd-knowledge in dykyi-roman/awesome-claude-code) into .claude/skills/ddd-knowledge in your project. Claude Code loads it when a task matches its description.
How do I install Ddd Knowledge in Codex?
Run `npx skills add dykyi-roman/awesome-claude-code --skill ddd-knowledge -a codex`. Or copy the skill folder (skills/ddd-knowledge in dykyi-roman/awesome-claude-code) into .agents/skills/ddd-knowledge in your project. Codex loads it when a task matches its description.
Can I use Ddd Knowledge 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 dykyi-roman/awesome-claude-code --skill ddd-knowledge -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-knowledge, .gemini/skills/ddd-knowledge, .github/skills/ddd-knowledge and .opencode/skills/ddd-knowledge in your project.
What does Ddd Knowledge need to run?
SKILL.md names no scripts, command-line tools or credentials: Ddd Knowledge is instructions for the agent only.
Does Ddd Knowledge 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 Knowledge 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 Knowledge use?
Ddd Knowledge is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Ddd Knowledge use?
About 1k tokens (SKILL.md is roughly 4.2k 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 15k tokens, read only when the agent opens those files.
What are the alternatives to Ddd Knowledge?
Skills that share tags, products or a category with Ddd Knowledge: Clean Architecture (giuseppe-trisciuoglio/developer-kit, 356 stars), Laravel Clean Architecture (HoangNguyen0403/agent-skills-standard, 571 stars), WooCommerce Code Review (woocommerce/woocommerce, 11k stars) and Domain Modeling (fossasia/eventyay-interpretation, 1.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Ddd Knowledge?
dykyi-roman (a GitHub user) maintains it in dykyi-roman/awesome-claude-code, which has 103 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on August 16, 2026.
Source: dykyi-roman/awesome-claude-code on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.