plan-creation

plan-creation is a skill for Claude Code, Codex from pueraeternis/agentic-project-template. It costs 0 tokens per session (802 once invoked), scanned A, original, MIT.

An implementation-planning step that turns the current state of a software project into one small, reviewable unit of work. The plan acts as an agreement for what should be built next.

In plain words
What is it for?
Use it after repository setup, or after finishing a previous plan, to define the next coding increment from the project, roadmap, architecture, and engineering documents.
Why use it?
It prevents large or vague work requests by setting a clear boundary around the next change and checking the written plans against the actual repository.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/pueraeternis/agentic-project-template/plan-creation
Any agent
npx skills add pueraeternis/agentic-project-template --skill plan-creation
Clone the repo
git clone --depth 1 https://github.com/pueraeternis/agentic-project-template

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 plan-creation

README.md
[![agentmods](https://agentmods.dev/badge/skills/pueraeternis/agentic-project-template/plan-creation.svg)](https://agentmods.dev/skills/pueraeternis/agentic-project-template/plan-creation)
Your own site
<a href="https://agentmods.dev/skills/pueraeternis/agentic-project-template/plan-creation"><img src="https://agentmods.dev/badge/skills/pueraeternis/agentic-project-template/plan-creation.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 802 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00802
Opus 5 $0.00000 $0.00401
Sonnet 5 $0.00000 $0.00160
Haiku 4.5 $0.00000 $0.00080

Measured 5d ago against content hash 813d6bf9c505, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

plan-creation 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 5d 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/plan-creation/SKILL.md · 249 lines

How it starts

The opening of the file, as written. The whole thing — 249 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Plan Creation

Purpose

This skill transforms the current project state into a single implementation increment.

Each implementation plan defines one bounded, reviewable, and executable unit of work.

The resulting plan becomes the engineering contract between planning, implementation, and review.


Lifecycle Stage

Repository Initialization
        ↓
Plan Creation
        ↓
Plan Review

Plan Creation defines what will be implemented next.

It does not perform implementation.


Role

Primary role:

Planning Agent


When to Use

Use this skill when:

  • project initialization has been completed;
  • the next implementation increment must be defined;
  • a previous implementation plan has been completed;
  • implementation priorities need to be adjusted.

Do not use this skill for:

  • project discovery;
  • architecture design;
  • engineering design;
  • production code;
  • code review.

Inputs

Required:

  • PROJECT.md
  • ROADMAP.md
  • ARCHITECTURE.md
  • ENGINEERING.md

Additional context:

  • ADRs;
  • completed plans;
  • current repository state.

Planning should reconcile documentation with the actual implementation before producing a new plan.


Outputs

Produce one implementation plan.

The plan should define:

  • objective;
  • scope;
  • out-of-scope items;
  • acceptance criteria;
  • validation strategy;
  • implementation checklist;
  • risks.

The plan becomes the authoritative specification for the next implementation increment.


Procedure

Step 1 — Build Context

Review:

  • project definition;
  • roadmap;
  • architecture;
  • engineering design;
  • ADRs;
  • completed plans;
  • current implementation.

Understand both project intent and repository state.


Step 2 — Select the Next Increment

Choose the smallest meaningful implementation increment.

The increment should:

  • deliver measurable value;
  • support the current roadmap phase;
  • respect architecture;
  • follow engineering conventions;
  • remain independently reviewable.

Read the full file on GitHub · 249 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. 5d ago First seen · 249 lines · 0 tokens per session scan A 813d6bf9c505

Subscribe to this mod's changes

plan-creation is a skill published in the GitHub repository pueraeternis/agentic-project-template (2 stars, last pushed 2mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 802 tokens. 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 2026-08-31.

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