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Agent skill

Codd Validate

by yohey-w in yohey-w/codd-dev

Validate CoDD frontmatter and dependency references before scan, impact, generation, or propagation work continues.

MITAuto-check passedDevelopment

Install Codd Validate

skills CLI
$ npx skills add yohey-w/codd-dev --skill codd-validate -a claude-code

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

GitHub CLI
$ gh skill install yohey-w/codd-dev codd-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/yohey-w/codd-dev.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/codd-validate .claude/skills/codd-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
codd-validate
GitHub stars
115
Token cost
~957 tokens
SKILL.md length
472 words
Files
1
Skills in repo
11
Repo updated
First seen
Licence
MIT

At a glance

Validate CoDD frontmatter and dependency references before scan, impact, generation, or propagation work continues.

  • Works in 8 steps: Preflight → Run validation → Interpret the result → …
  • The user needs to confirm YAML frontmatter
  • SKILL.md covers Usage and Instructions
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Codd Validate is an agent skill from yohey-w/codd-dev. Validate CoDD frontmatter and dependency references before scan, impact, generation, or propagation work continues. Use when the user needs to confirm YAML frontmatter, required metadata, dependency references, and graph inputs are parseable and internally consistent.

Its SKILL.md is about 960 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. The repository describes itself as: CoDD: Coherence-Driven Development — Claude Code plugin for cross-artifact change impact analysis. The licence is MIT.

When your agent uses it

  • The user needs to confirm YAML frontmatter
  • Required metadata
  • Dependency references
  • Graph inputs are parseable and internally consistent

Example prompts

  • “/codd-validate”

Workflow steps

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

  1. Preflight
  2. Run validation
  3. Interpret the result
  4. ERROR triage by category
  5. Fix broken frontmatter step by step
  6. Recommended scan -> validate flow
  7. Troubleshooting
  8. Exit condition

What it can do on your machine

Read from SKILL.md and the folder at commit 41b5f87. 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 bash).

    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

Codd Validate loads about 957 tokens when it runs. Until then it costs about 71 tokens; SKILL.md has 472 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~71
When it runs · the whole SKILL.md, loaded when a task matches
~957

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 yohey-w/codd-dev at commit 41b5f87, republished under its MIT licence (© yohey-w). 472 words, ~957 tokens.

Download SKILL.mdSave it as .claude/skills/codd-validate/SKILL.md (or your agent's skills folder).
name
codd-validate
description
Validate CoDD frontmatter and dependency references before scan, impact, generation, or propagation work continues. Use when the user needs to confirm YAML frontmatter, required metadata, dependency references, and graph inputs are parseable and internally consistent.

CoDD Validate

Validate CoDD frontmatter and dependency references before impact analysis so broken metadata does not poison the graph or downstream change-propagation work.

Usage

Run this skill after codd scan --path ., after editing requirement or design documents, or any time you suspect frontmatter or dependency references may be inconsistent.

Instructions

  1. Preflight:

    • Work from the project root.
    • Verify codd/codd.yaml exists. If not, run codd init first.
    • If the codd command is not available, install the package so the CLI entry point is on PATH before continuing.

  2. Run validation:

bash
codd validate --path .

  1. Interpret the result:

    • PASS: Treat OK: validated ... output as a pass. Frontmatter is structurally valid enough to proceed, and dependency references are consistent enough for the next step. After a clean pass, codd impact is safe to run.
    • ERROR: Stop and fix the reported documents before continuing. Use the categories below to decide the repair.
    • BLOCKED or WARNING: Read the message, fix what is actionable, and re-run validation until the remaining output is understood.

  2. ERROR triage by category:

    • missing_field: Required frontmatter data is missing or malformed. Open the affected design document and add or repair the needed fields, especially node_id, title, and depends_on when the design requires declared upstream dependencies. In current validator output, this often appears as missing or invalid frontmatter rather than a literal missing_field code.
    • invalid_reference: A document references a node_id that does not exist or is misspelled. Correct the typo or point the reference at the real upstream node. In current validator output, this usually shows up as undefined-reference messages such as dangling depends_on or depended_by.
    • circular_dependency: Two or more documents depend on each other in a loop. Revisit depends_on, remove the back-edge, and restore a one-way dependency order.

  3. Fix broken frontmatter step by step:

    1. Open the document named in the validation error.
    2. Inspect the YAML frontmatter at the top of the file, bounded by ---.
    3. Confirm the required fields are present and valid: node_id, title, and depends_on where applicable.
    4. Save the correction.
    5. Re-run codd validate --path . and confirm the error is gone.

  4. Recommended scan -> validate flow:

Show full SKILL.md (124 more words)Show less
bash
codd scan --path .
codd validate --path .
# fix reported errors
codd validate --path .

  1. Troubleshooting:

    • Error: codd/ not found. Run 'codd init' first.: Initialize the project before validating.
    • command not found: codd: Install the package or activate the environment that exposes the codd console script.
    • invalid_frontmatter: Fix YAML syntax first. Common causes are missing : separators, bad indentation, or an unclosed list entry.
    • missing_frontmatter or missing_field: Add the missing CoDD frontmatter block and required fields, then validate again.
    • dangling_depends_on or dangling_depended_by: Treat these as invalid_reference problems and repair the referenced node_id.
    • Repeated circular_dependency errors: Draw the dependency chain on paper, decide which document is the real upstream source of truth, and remove the reverse dependency.

  2. Exit condition:

    • Do not move on to codd impact until validation is clean or the remaining warnings are explicitly understood and accepted.

© yohey-w, 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 skills/codd-validate of yohey-w/codd-dev.

Open the folder on GitHubat commit 41b5f87

Compare with similar skills

Codd 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.

Codd Validate compared with similar skills
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Codd Validate this skillyohey-w/codd-dev115—~957Automated safety check: PassMIT
Vercel Composition Patternssupabase/supabase111k59 repos~726Automated safety check: PassMIT
Finishing a Development Branchobra/superpowers296k5 repos~1.9kAutomated safety check: PassMIT
Typescript Advanced Typesrolling-scopes/rsschool-app10k25 repos~4.2kAutomated safety check: PassMPL-2.0
PR Babysitteropeninterpreter/openinterpreter69k3 repos~4.2kAutomated safety check: PassApache-2.0
Code Review ChecklistshareAI-lab/learn-claude-code78k5 repos~1.1kAutomated safety check: PassMIT

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More from yohey-w/codd-dev

All 11 skills in this repo

  • Codd Generate

    yohey-w/codd-dev

    Generate CoDD design documents for a greenfield project one wave at a time.

    115 GitHub stars~1.5k tokensUpdated 23 days ago
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  • Codd Greenfield

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    Run the CoDD greenfield autopilot: a requirements document in, a working system out, unattended.

    115 GitHub stars~2.2k tokensUpdated 23 days ago
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  • Codd Init

    yohey-w/codd-dev

    Initialize CoDD in a project and establish the first scan and validation baseline.

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  • Codd Propagate

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    Reverse-propagate source code changes back to affected CoDD design documents.

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  • Codd Restore

    yohey-w/codd-dev

    Reconstruct CoDD design documents from extracted code facts for a brownfield project.

    115 GitHub stars~1.3k tokensUpdated 23 days ago
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  • Codd Impact

    yohey-w/codd-dev

    Analyze the downstream impact of changed requirements, design docs, code, or tests in a CoDD project.

    115 GitHub stars~1.5k tokensUpdated 23 days ago
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Categories

Questions about Codd Validate

What does Codd Validate do?

Validate CoDD frontmatter and dependency references before scan, impact, generation, or propagation work continues. Codd Validate is an agent skill from yohey-w/codd-dev. Validate CoDD frontmatter and dependency references before scan, impact, generation, or propagation work continues.

When should I use Codd Validate?

Codd Validate fits situations like: the user needs to confirm YAML frontmatter; required metadata; dependency references; graph inputs are parseable and internally consistent.

How do I install Codd Validate in Claude Code?

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

How do I install Codd Validate in Codex?

Run `npx skills add yohey-w/codd-dev --skill codd-validate -a codex`. Or copy the skill folder (skills/codd-validate in yohey-w/codd-dev) into .agents/skills/codd-validate in your project. Codex loads it when a task matches its description.

Can I use Codd 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 yohey-w/codd-dev --skill codd-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/codd-validate, .gemini/skills/codd-validate, .github/skills/codd-validate and .opencode/skills/codd-validate in your project.

What does Codd Validate need to run?

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

Does Codd Validate 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 Codd Validate 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 Codd Validate use?

Codd 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 Codd Validate use?

About 957 tokens (SKILL.md is roughly 3.8k 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 Codd Validate?

Skills that share tags, products or a category with Codd Validate: Vercel Composition Patterns (supabase/supabase, 111k stars), Finishing a Development Branch (obra/superpowers, 296k stars), Typescript Advanced Types (rolling-scopes/rsschool-app, 10k stars) and PR Babysitter (openinterpreter/openinterpreter, 69k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Codd Validate?

yohey-w (a GitHub user) maintains it in yohey-w/codd-dev, which has 115 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on September 14, 2026.

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