planr-plan

planr-plan is a skill for Claude Code, Codex from instructa/planr. It costs 41 tokens per session (1,102 once invoked), scanned A, original, MIT.

A planning tool for turning an app idea or broad engineering task into a documented product plan and build plan.

In plain words
What is it for?
Use it to create or refine product plans, split work into implementation slices, check plans, and build an executable task map.
Why use it?
It makes scope, ownership, acceptance criteria, architecture, safety, testing, and release requirements explicit before implementation starts.

Skill for Claude CodeCodex

Part of the planr plugin — 10 skills, 2 agents shipped together

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/instructa/planr/planr-plan
Any agent
npx skills add instructa/planr --skill planr-plan
Clone the repo
git clone --depth 1 https://github.com/instructa/planr

Made for: Claude Code, Codex.

Or install planr, the plugin that ships this one along with the rest of its 10 skills, 2 agents.

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 planr-plan

README.md
[![agentmods](https://agentmods.dev/badge/skills/instructa/planr/planr-plan.svg)](https://agentmods.dev/skills/instructa/planr/planr-plan)
Your own site
<a href="https://agentmods.dev/skills/instructa/planr/planr-plan"><img src="https://agentmods.dev/badge/skills/instructa/planr/planr-plan.svg" alt="Measured on agentmods" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,102 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 $0.00041 $0.01102
Opus 5 $0.00020 $0.00551
Sonnet 5 $0.00008 $0.00220
Haiku 4.5 $0.00004 $0.00110

Measured 4d ago against content hash 01b86e9d9df3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

planr-plan 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 4d 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.

plugins/planr/skills/planr-plan/SKILL.md · 113 lines

How it starts

The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Planr Plan

Read and apply the canonical Evidence ownership guard before product planning.

Use this when scope, ownership, acceptance criteria, or verification must be defined before implementation.

Workflow

planr project show --json
planr plan new "App idea" [--platform web] [--ai] [--backend]
planr plan refine <plan-id> --note "decision, constraint, or assumption"
planr plan check <plan-id>
planr plan split <plan-id> --slice "narrow implementation slice"
planr map build --from <build-plan-id>

Product Plan Standard

A product plan package must include:

  • manifest;
  • product spec;
  • UX flows;
  • design system;
  • architecture;
  • ADRs;
  • AI spec when relevant;
  • safety/privacy/security;
  • API/data model;
  • client and backend implementation specs;
  • observability;
  • QA;
  • release readiness;
  • executable tasks;
  • references.

Build Plan Standard

A build plan must include:

  • source plan;
  • a non-empty criteria frontmatter list whose entries contain only a stable id and title;
  • scope decision;
  • ownership target;
  • existing leverage;
  • phases;
  • out of scope;
  • verification;
  • acceptance criteria.

Author criterion identity only in frontmatter, for example:

criteria:
  - id: criterion-api-health
    title: API health is observable from the target service

Keep the ## Acceptance Criteria section as readable narrative, never an identity source. Do not infer criterion IDs from prose or decide obligation completeness in this skill; plan check, explicit Evidence migration, and the canonical app/proof authority own those decisions.

For binding Evidence, inspect planr evidence policy --json and select existing named presets by their observation semantics. The repository policy and registered capability—not the provider or skill name in the user's prompt—own schemas and execution. If the policy default correctly covers every criterion, no extra frontmatter is needed. Otherwise author only preset references beside the closed criterion list:

Read the full file on GitHub · 113 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. 4d ago First seen · 113 lines · 41 tokens per session scan A 01b86e9d9df3

Subscribe to this mod's changes

planr-plan is a skill published in the GitHub repository instructa/planr (71 stars, last pushed 7d ago), licensed MIT. It adds 41 tokens to every session and 1,102 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 2026-08-30.