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Agent skill

Ddd Validate

by ruvnet in ruvnet/ruflo

Validate domain boundaries -- detect cross-context import violations and aggregate invariant issues.

MITAuto-check: notesDevelopment

Install Ddd Validate

skills CLI
$ npx skills add ruvnet/ruflo --skill ddd-validate -a claude-code

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

GitHub CLI
$ gh skill install ruvnet/ruflo ddd-validate --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/ruvnet/ruflo.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/ruflo-ddd/skills/ddd-validate .claude/skills/ddd-validate && 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
ddd-validate
GitHub stars
74k
Token cost
~643 tokens
SKILL.md length
183 words
Files
1
Skills in repo
264
Repo updated
First seen
Licence
MIT

At a glance

Validate domain boundaries -- detect cross-context import violations and aggregate invariant issues.

  • Works in 7 steps: Discover contexts: Scan src/*/domain/ to… → Check cross-boundary violations → Check aggregate invariant enforcement → …
  • Auditing a DDD codebase for leaks between bounded contexts
  • Calls npx
  • Before merging cross-cutting changes

What it does

Ddd Validate is an agent skill from ruvnet/ruflo. Validate domain boundaries -- detect cross-context import violations and aggregate invariant issues. Use when auditing a DDD codebase for leaks between bounded contexts, before merging cross-cutting changes, or as a CI gate to catch boundary erosion early.

Its SKILL.md is about 640 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Domain-driven design. The repository describes itself as: 🌊 The original agent harness. Deploy intelligent multi-player swarms, coordinate autonomous workflows, and build conversational AI systems. Features adaptive memory…. The licence is MIT.

When your agent uses it

  • Auditing a DDD codebase for leaks between bounded contexts
  • Before merging cross-cutting changes
  • As a CI gate to catch boundary erosion early

Example prompts

  • “/ddd-validate”

Requirements

  • Node.js
  • Pre-approved tools (allowed-tools): Bash, Read, Grep, Glob, mcp__plugin_ruflo-core_ruflo__memory_store, mcp__plugin_ruflo-core_ruflo__memory_search, mcp__plugin_ruflo-core_ruflo__hooks_pre-task, mcp__plugin_ruflo-core_ruflo__hooks_post-task

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

  1. Discover contexts: Scan src/*/domain/ to find all bounded contexts.
  2. Check cross-boundary violations
  3. Check aggregate invariant enforcement
  4. Check event naming conventions
  5. Check repository patterns
  6. Report findings
  7. Store results

What it can do on your machine

Read from SKILL.md and the folder at commit de590e1. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Bash
    • Read
    • Grep
    • Glob
    • mcp__plugin_ruflo-core_ruflo__memory_store
    • mcp__plugin_ruflo-core_ruflo__memory_search
    • mcp__plugin_ruflo-core_ruflo__hooks_pre-task
    • mcp__plugin_ruflo-core_ruflo__hooks_post-task

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • npx

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

  • Network

    No URLs in SKILL.md. Its commands use npx, which can reach the network depending on how they are called.

    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 Validate loads about 643 tokens when it runs. Until then it costs about 67 tokens; SKILL.md has 183 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~67
When it runs · the whole SKILL.md, loaded when a task matches
~643

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: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Bash, Read, Grep, Glob, mcp__plugin_ruflo-core_ruflo__memory_store, mcp__plugin_ruflo-core_ruflo__me

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 ruvnet/ruflo at commit de590e1, republished under its MIT licence (© ruvnet). 183 words, ~643 tokens.

Download SKILL.mdSave it as .claude/skills/ddd-validate/SKILL.md (or your agent's skills folder).
name
ddd-validate
description
Validate domain boundaries -- detect cross-context import violations and aggregate invariant issues. Use when auditing a DDD codebase for leaks between bounded contexts, before merging cross-cutting changes, or as a CI gate to catch boundary erosion early.
allowed-tools
Bash, Read, Grep, Glob, mcp__plugin_ruflo-core_ruflo__memory_store, mcp__plugin_ruflo-core_ruflo__memory_search, mcp__plugin_ruflo-core_ruflo__hooks_pre-task, mcp__plugin_ruflo-core_ruflo__hooks_post-task

Validate domain boundary integrity across all bounded contexts.

Steps

  1. Discover contexts: Scan src/*/domain/ to find all bounded contexts.

  2. Check cross-boundary violations:

    • For each context, scan all .ts files for import statements
    • Flag any import that reaches into another context's domain/ directory directly
    • Allowed: importing from another context's public index.ts (application layer)
    • Violation: importing from src/<other-context>/domain/entities/... directly
    bash
    # Find cross-boundary imports
for ctx in $(find src -maxdepth 2 -name "domain" -type d | sed 's|src/||;s|/domain||'); do
  grep -rn "from ['\"].*src/" "src/$ctx/" --include="*.ts" | grep -v "src/$ctx/" || true
done

  3. Check aggregate invariant enforcement:

    • Scan aggregate root entities for public setters that bypass validation
    • Flag mutable public properties without invariant checks
    • Verify that child entities are not directly accessible (must go through aggregate root)

  4. Check event naming conventions:

    • Domain events should be past-tense named (e.g., OrderCreated, not CreateOrder)
    • Events should be immutable (no public setters)
    • Events should carry the aggregate ID

  5. Check repository patterns:

    • Repository interfaces should exist in domain/repositories/, not infrastructure/
    • Repository implementations should exist in infrastructure/, not domain/
    • Each aggregate root should have exactly one repository

  6. Report findings:

    • Output a table of violations with file path, line number, violation type, and suggestion
    • Categorize as: BOUNDARY, INVARIANT, EVENT, REPOSITORY
    • Exit with summary: total violations, by category, severity

  7. Store results:

    bash
    npx @claude-flow/cli@latest memory store --key "ddd-validation-TIMESTAMP" --value "RESULTS_SUMMARY" --namespace tasks
npx @claude-flow/cli@latest hooks post-task --task-id "ddd-validate" --success true --store-results true

© ruvnet, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in plugins/ruflo-ddd/skills/ddd-validate of ruvnet/ruflo.

Open the folder on GitHubat commit de590e1

Compare with similar skills

Ddd Validate 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 Validate compared with similar skills
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Ddd Validate this skillruvnet/ruflo74k—~643Automated safety check: NotesMIT
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Architecture Governancezai-org/ZCode7.5k—~1.2kAutomated safety check: PassApache-2.0
Evolutionary Modular Architecturetech-leads-club/agent-skills7k—~3.7kAutomated safety check: PassCC-BY-4.0
Domain Modelingbrim-borium/spotify_sdk1665 repos~806Automated safety check: PassApache-2.0
Domain Modeling and Glossarywindmill-labs/windmill18k—~622Automated safety check: PassCustom licence

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Categories

Questions about Ddd Validate

What does Ddd Validate do?

Validate domain boundaries -- detect cross-context import violations and aggregate invariant issues. Ddd Validate is an agent skill from ruvnet/ruflo. Validate domain boundaries -- detect cross-context import violations and aggregate invariant issues.

When should I use Ddd Validate?

Ddd Validate fits situations like: auditing a DDD codebase for leaks between bounded contexts; before merging cross-cutting changes; as a CI gate to catch boundary erosion early.

How do I install Ddd Validate in Claude Code?

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

How do I install Ddd Validate in Codex?

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

Can I use Ddd Validate 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 ruvnet/ruflo --skill ddd-validate -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-validate, .gemini/skills/ddd-validate, .github/skills/ddd-validate and .opencode/skills/ddd-validate in your project.

What does Ddd Validate need to run?

Going by SKILL.md and its folder, Ddd Validate needs the command-line tools its instructions call (npx). Our summary lists: Node.js. Its frontmatter pre-approves these tools: Bash, Read, Grep, Glob, mcp__plugin_ruflo-core_ruflo__memory_store, mcp__plugin_ruflo-core_ruflo__memory_search, mcp__plugin_ruflo-core_ruflo__hooks_pre-task, mcp__plugin_ruflo-core_ruflo__hooks_post-task.

Does Ddd Validate access the network?

SKILL.md contains no URLs. Its commands use npx, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Ddd Validate safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Ddd Validate use?

Ddd Validate 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 Validate use?

About 643 tokens (SKILL.md is roughly 2.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Ddd Validate?

Skills that share tags, products or a category with Ddd Validate: Domain Modeling (fossasia/eventyay-interpretation, 1.6k stars), Architecture Governance (zai-org/ZCode, 7.5k stars), Evolutionary Modular Architecture (tech-leads-club/agent-skills, 7k stars) and Domain Modeling (brim-borium/spotify_sdk, 166 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Ddd Validate?

ruvnet (a GitHub user) maintains it in ruvnet/ruflo, which has 74,012 GitHub stars. The repository holds 264 skills in this directory. The repository was last updated on October 7, 2026.

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