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Agent skill

A2ui Blueprint Navigator

by a2ui-project in a2ui-project/a2ui

Analytical navigation of A2UI Spec-Driven Development module and codebase blueprints.

Apache-2.0Auto-check passedDevelopment

Install A2ui Blueprint Navigator

skills CLI
$ npx skills add a2ui-project/a2ui --skill a2ui-blueprint-navigator -a claude-code

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

GitHub CLI
$ gh skill install a2ui-project/a2ui a2ui-blueprint-navigator --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/a2ui-project/a2ui.git skills-src && mkdir -p .claude/skills && cp -r skills-src/blueprints/skills/a2ui-blueprint-navigator .claude/skills/a2ui-blueprint-navigator && 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
a2ui-blueprint-navigator
GitHub stars
17k
Token cost
~669 tokens
SKILL.md length
252 words
Files
1
Skills in repo
20
Repo updated
First seen
Licence
Apache-2.0

At a glance

Analytical navigation of A2UI Spec-Driven Development module and codebase blueprints.

  • Works in 3 steps: Understanding Blueprints Layout → Commit-Hash Module Compliance → Navigator Recipes
  • Tasks that involve Spec-driven development
  • SKILL.md covers 1. Understanding Blueprints…, 2. Commit-Hash Module Compliance and 3. Navigator Recipes
  • Calls git

What it does

A2ui Blueprint Navigator is an agent skill from a2ui-project/a2ui. Analytical navigation of A2UI Spec-Driven Development module and codebase blueprints.

Its SKILL.md is about 670 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 Spec-driven development. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Spec-driven development

Example prompts

  • “/a2ui-blueprint-navigator”

Workflow steps

3 steps, taken from the step headings in SKILL.md.

  1. Understanding Blueprints Layout
  2. Commit-Hash Module Compliance
  3. Navigator Recipes

What it can do on your machine

Read from SKILL.md and the folder at commit 03b77ae. 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:

    • git

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

  • Network

    No URLs in SKILL.md. Its commands use git, 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

A2ui Blueprint Navigator loads about 669 tokens when it runs. Until then it costs about 28 tokens; SKILL.md has 252 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~28
When it runs · the whole SKILL.md, loaded when a task matches
~669

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 a2ui-project/a2ui at commit 03b77ae, republished under its Apache-2.0 licence (© a2ui-project). 252 words, ~669 tokens.

Download SKILL.mdSave it as .claude/skills/a2ui-blueprint-navigator/SKILL.md (or your agent's skills folder).
name
a2ui-blueprint-navigator
description
Analytical navigation of A2UI Spec-Driven Development module and codebase blueprints.

A2UI Blueprint Navigator Skill

This skill provides precise analytical methods and recipes for discovering blueprints, inspecting commit-hash compliance, and mapping language-agnostic specifications to physical directories in the monorepo.

1. Understanding Blueprints Layout

Spec-Driven Development (SDD) in A2UI confines all specifications and compliance files inside blueprints/:

  1. Module Blueprints (blueprints/modules/): Language-agnostic authorities specifying core architecture, APIs, types, and expected behaviors (e.g. a2ui_core.blueprint.md).
  2. Feature Blueprints (blueprints/features/): Standalone optional feature specifications (features/<name>.blueprint.md) and merged required features (features/archived/<name>.blueprint.md).
  3. Codebase Blueprints (blueprints/codebases/<relative_codebase_path>/codebase.blueprint.md): Local metadata trackers documenting codebase compliance with a specific git commit hash of its associated Module Blueprint (module_blueprint_commit).

2. Commit-Hash Module Compliance

Rather than checking against a list of required feature names, a codebase's compliance status is tracked by the git commit hash of its associated Module Blueprint (module_blueprint_commit).

  • When a feature is merged into a Module Blueprint (blueprints/modules/<module>.blueprint.md), the file's git commit hash advances.
  • Codebase blueprints verify and update compliance by checking diffs against module_blueprint_commit.

3. Navigator Recipes

Recipe A: Check if a Codebase is Up to Date with its Module Blueprint
  1. Open the codebase blueprint at blueprints/codebases/<relative_path>/codebase.blueprint.md.
  2. Inspect module_blueprint_commit in the YAML frontmatter.
  3. Retrieve the latest commit hash of the associated module blueprint:
    bash
    git log -n 1 --pretty=format:%H blueprints/modules/<associated_module>.blueprint.md
  4. If module_blueprint_commit matches the latest commit hash, the codebase is up to date.
  5. If they differ, inspect the exact specification diff that needs to be implemented:
    bash
    git diff <module_blueprint_commit>..HEAD blueprints/modules/<associated_module>.blueprint.md
Recipe B: Find the Module Blueprint for a Particular Codebase
  1. Locate the codebase blueprint at blueprints/codebases/<relative_path>/codebase.blueprint.md.
  2. Look up associated_module in the frontmatter.
  3. Open blueprints/modules/<associated_module>.blueprint.md.

© a2ui-project, Apache-2.0. 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 blueprints/skills/a2ui-blueprint-navigator of a2ui-project/a2ui.

Open the folder on GitHubat commit 03b77ae

Compare with similar skills

A2ui Blueprint Navigator 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.

A2ui Blueprint Navigator compared with similar skills
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A2ui Blueprint Navigator this skilla2ui-project/a2ui17k—~669Automated safety check: PassApache-2.0
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Speckit ConstitutionWeihanLi/WeihanLi.Common24211 repos~2.1kAutomated safety check: PassApache-2.0
Speckit Plankunstmusik/blue15418 repos~2.1kAutomated safety check: PassGPL-3.0
Speckit Specifykunstmusik/blue15418 repos~4.7kAutomated safety check: PassGPL-3.0
Review Spdzhu1090093659/spec_driven_develop985—~1.5kAutomated safety check: PassMIT

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Categories

Questions about A2ui Blueprint Navigator

What does A2ui Blueprint Navigator do?

Analytical navigation of A2UI Spec-Driven Development module and codebase blueprints. A2ui Blueprint Navigator is an agent skill from a2ui-project/a2ui. Analytical navigation of A2UI Spec-Driven Development module and codebase blueprints.

When should I use A2ui Blueprint Navigator?

A2ui Blueprint Navigator fits situations like: tasks that involve Spec-driven development.

How do I install A2ui Blueprint Navigator in Claude Code?

Run `npx skills add a2ui-project/a2ui --skill a2ui-blueprint-navigator -a claude-code`. Or copy the skill folder (blueprints/skills/a2ui-blueprint-navigator in a2ui-project/a2ui) into .claude/skills/a2ui-blueprint-navigator in your project. Claude Code loads it when a task matches its description.

How do I install A2ui Blueprint Navigator in Codex?

Run `npx skills add a2ui-project/a2ui --skill a2ui-blueprint-navigator -a codex`. Or copy the skill folder (blueprints/skills/a2ui-blueprint-navigator in a2ui-project/a2ui) into .agents/skills/a2ui-blueprint-navigator in your project. Codex loads it when a task matches its description.

Can I use A2ui Blueprint Navigator 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 a2ui-project/a2ui --skill a2ui-blueprint-navigator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/a2ui-blueprint-navigator, .gemini/skills/a2ui-blueprint-navigator, .github/skills/a2ui-blueprint-navigator and .opencode/skills/a2ui-blueprint-navigator in your project.

What does A2ui Blueprint Navigator need to run?

Going by SKILL.md and its folder, A2ui Blueprint Navigator needs the command-line tools its instructions call (git).

Does A2ui Blueprint Navigator access the network?

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

Is A2ui Blueprint Navigator 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 A2ui Blueprint Navigator use?

A2ui Blueprint Navigator is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does A2ui Blueprint Navigator use?

About 669 tokens (SKILL.md is roughly 2.7k 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 A2ui Blueprint Navigator?

Skills that share tags, products or a category with A2ui Blueprint Navigator: OpenSpec Bulk Change Archiver (Fission-AI/OpenSpec, 71k stars), Speckit Constitution (WeihanLi/WeihanLi.Common, 242 stars), Speckit Plan (kunstmusik/blue, 154 stars) and Speckit Specify (kunstmusik/blue, 154 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains A2ui Blueprint Navigator?

a2ui-project (a GitHub organization) maintains it in a2ui-project/a2ui, which has 16,638 GitHub stars. The repository holds 20 skills in this directory. The repository was last updated on October 9, 2026.

Source: a2ui-project/a2ui on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.