blueprint-development

blueprint-development is a skill for Claude Code from laurigates/claude-plugins. It costs 29 tokens per session (1,801 once invoked), scanned B, original, MIT.

A guide for the Blueprint Development method, which creates project-specific development rules and workflow commands from PRDs. A PRD is a document describing what a product or feature should do.

In plain words
What is it for?
Use it when starting Blueprint Development with existing PRDs and when generating project-specific behavioral guidelines or workflow automation.
Why use it?
Generic coding practices may not match a particular project's requirements. This helps translate its written requirements into rules for architecture, testing, and quality.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: reads .claude/ paths; mentions subagents; names the TodoWrite tool.

Part of the blueprint-plugin plugin — 35 skills shipped together

Good fit Use it when starting Blueprint Development with existing PRDs and when generating project-specific behavioral guidelines or workflow automation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/laurigates/claude-plugins/blueprint-development
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add laurigates/claude-plugins --skill blueprint-development
Clone the repo
git clone --depth 1 https://github.com/laurigates/claude-plugins

Made for: Claude Code.

Or install blueprint-plugin, the plugin that ships this one along with the rest of its 35 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for blueprint-development

README.md
[![agentmods](https://agentmods.dev/badge/skills/laurigates/claude-plugins/blueprint-development/github.svg)](https://agentmods.dev/skills/laurigates/claude-plugins/blueprint-development)
Your own site
<a href="https://agentmods.dev/skills/laurigates/claude-plugins/blueprint-development"><img src="https://agentmods.dev/badge/skills/laurigates/claude-plugins/blueprint-development/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for blueprint-development

Your own site · 80×15
<a href="https://agentmods.dev/skills/laurigates/claude-plugins/blueprint-development"><img src="https://agentmods.dev/badge/skills/laurigates/claude-plugins/blueprint-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,801 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 3 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Agent Snooping · line 30
    Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.
    Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
  • high Agent Snooping · line 31
    Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.
    Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
  • high Agent Snooping · line 166
    Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.
    Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00029 $0.01801
Opus 5.5 $0.00012 $0.00720
Sonnet 5.5 $0.00006 $0.00360
Haiku 4.5 $0.00003 $0.00180

Measured 6d ago against content hash 6a8458b1f5d5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

blueprint-development scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

- Rules directory: !`find . -path '*/.claude/rules' -maxdepth 2 -type d`
blueprint-plugin/skills/blueprint-development/SKILL.md · 178 lines

How it starts

The opening of the file, as written. The whole thing — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/blueprint:development

Guide and reference for the Blueprint Development methodology that generates project-specific behavioral rules and workflow commands from PRDs (Product Requirements Documents).

When to Use This Skill

Use this skill when... Use alternative when...
Starting Blueprint Development in a project Project is already using Blueprint (use /blueprint:status)
Need to generate rules from PRDs Starting a brand new project with no PRD yet
Want project-specific behavioral guidelines Using generic development practices
Creating workflow automation for a project Working on isolated tasks without project context

For detailed rule templates, command templates, and generation guidelines, see REFERENCE.md.

Context

  • Blueprint initialized: !find . -path '*/docs/blueprint/*' -maxdepth 3 -name 'manifest.json' -type f
  • PRDs present: !find . -path '*/docs/prds/*' -name "*.md" -type f
  • Rules directory: !find . -path '*/.claude/rules' -maxdepth 2 -type d
  • Existing rules: !find . -path '*/.claude/rules/*' -maxdepth 3 -name "*.md"
  • Project type: !find . -maxdepth 1 \( -name 'package.json' -o -name 'pyproject.toml' -o -name 'Cargo.toml' -o -name 'go.mod' \) -type f -print -quit

Execution

Execute the complete Blueprint Development setup and rule generation workflow:

Step 1: Verify project readiness

Check the values in Context:

  1. If Blueprint initialized = "NO" → Error: "Blueprint not initialized. Run /blueprint:init first"
  2. If PRDs present = "0" → Error: "No PRDs found. Create at least one PRD in docs/prds/ before generating rules"
  3. If Rules directory = "NO" → Create: mkdir -p .claude/rules

Step 2: Analyze PRDs and extract patterns

Read all PRD files in docs/prds/ and extract:

  1. Architecture Patterns: Project structure, dependency injection, error handling, module boundaries, layering, code organization
  2. Testing Strategies: TDD workflow, test types (unit, integration, e2e), mocking patterns, coverage requirements
  3. Implementation Guides: Patterns for implementing feature types (APIs, UI, database, external services)
  4. Quality Standards: Code review checklist, performance baselines, security requirements, style standards

Read the full file on GitHub · 178 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago Changed 6a8458b1f5d5
  2. 9d ago Changed · -1 lines ed2932881724
  3. 1mo ago First seen · 179 lines · 29 tokens per session scan B 7f5bbac894fa

Subscribe to this mod's changes

blueprint-development is a skill published in the GitHub repository laurigates/claude-plugins (60 stars, last pushed yesterday), licensed MIT. It adds 29 tokens to every session and 1,801 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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