blueprint

blueprint is a skill for Claude Code, Codex from jxoesneon/Ciel. It costs 45 tokens per session (888 once invoked), scanned A, original, Apache-2.0.

A tool for turning a broad development goal into a detailed, multi-step construction plan with dependencies, parallel work, review gates, and context for each step.

In plain words
What is it for?
It is for planning large changes, ordering dependent tasks, identifying work that can happen in parallel, and preparing self-contained instructions for implementers.
Why use it?
It reduces rework when a feature, refactor, or migration spans several pull requests, agents, or sessions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents.

Good fit It is for planning large changes, ordering dependent tasks, identifying work that can happen in parallel, and preparing self-contained instructions for implementers.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jxoesneon/ciel/blueprint
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 jxoesneon/Ciel --skill blueprint
Clone the repo
git clone --depth 1 https://github.com/jxoesneon/Ciel

Made for: Claude Code, Codex.

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

README.md
[![agentmods](https://agentmods.dev/badge/skills/jxoesneon/ciel/blueprint/github.svg)](https://agentmods.dev/skills/jxoesneon/ciel/blueprint)
Your own site
<a href="https://agentmods.dev/skills/jxoesneon/ciel/blueprint"><img src="https://agentmods.dev/badge/skills/jxoesneon/ciel/blueprint/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

Your own site · 80×15
<a href="https://agentmods.dev/skills/jxoesneon/ciel/blueprint"><img src="https://agentmods.dev/badge/skills/jxoesneon/ciel/blueprint.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 888 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00045 $0.00888
Opus 5 $0.00023 $0.00444
Sonnet 5 $0.00009 $0.00178
Haiku 4.5 $0.00005 $0.00089

Measured 7d ago against content hash 9f10f4a0a9d8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

blueprint scanned grade A with 0 findings 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 7d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/blueprint/SKILL.md · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CIEL ADAPTATION: Blueprint — Construction Plan Generator

This skill turns a one-line objective into a step-by-step construction plan that any coding agent can execute cold. Unlike make-plan (which produces a simple linear task list), Blueprint adds adversarial review gates, dependency graphs with parallel step detection, an anti-pattern catalog, a plan mutation protocol, and self-contained per-step context briefs designed for multi-session and multi-agent use. Pure planning — no execution, zero runtime risk.

When to Use

  • Breaking a large feature into multiple PRs with clear dependency order
  • Planning a refactor or migration spanning multiple sessions
  • Coordinating parallel workstreams across sub-agents
  • Any task where context loss between sessions would cause rework

Do not use for tasks completable in a single PR, fewer than 3 tool calls, or when the user says "just do it."

5-Phase Pipeline

  1. Research — Pre-flight checks (git, gh auth, remote, default branch). Reads project structure, existing plans, and memory files for context.
  2. Design — Breaks objective into one-PR-sized steps (3–12 typical). Assigns dependency edges, parallel/serial ordering, model tier (strongest vs default), and rollback strategy per step.
  3. Draft — Writes self-contained Markdown plan to plans/. Every step includes context brief, task list, verification commands, and exit criteria — a fresh agent can execute any step without reading prior steps.
  4. Review — Delegates adversarial review to a strongest-model sub-agent against a checklist and anti-pattern catalog. Fixes all critical findings before finalizing.
  5. Register — Saves plan, updates memory index, presents step count and parallelism summary.

Key Features

  • Cold-start execution: Every step has a self-contained context brief — no prior context needed.
  • Adversarial review gate: Strongest-model sub-agent reviews every plan for completeness, dependency correctness, and anti-patterns.
  • Branch/PR/CI workflow: Built into every step; degrades gracefully to direct mode when git/gh is absent.
  • Parallel step detection: Dependency graph identifies steps with no shared files or output dependencies.
  • Plan mutation protocol: Steps can be split, inserted, skipped, reordered, or abandoned with formal protocols and audit trail.

Read the full file on GitHub · 58 lines

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. 7d ago First seen · 58 lines · 45 tokens per session scan A 9f10f4a0a9d8

Subscribe to this mod's changes

blueprint is a skill published in the GitHub repository jxoesneon/Ciel (1 stars, last pushed 3d ago), licensed Apache-2.0. It adds 45 tokens to every session and 888 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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