phase-plan

phase-plan is a skill for Claude Code from rp1-run/rp1. It costs 18 tokens per session (1,537 once invoked), scanned A, original, Apache-2.0.

A planning workflow that turns a completed product requirements document, or PRD, into ordered delivery phases. A PRD is a document describing what a product or feature should do.

In plain words
What is it for?
Use it to create or revise a phased implementation plan from a PRD or a large requirements document.
Why use it?
Large requirements are hard to deliver as one piece and can hide dependencies between tasks. Breaking them into phases makes the work easier to organise and track.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the rp1-dev plugin — 23 skills, 36 agents shipped together

Good fit Use it to create or revise a phased implementation plan from a PRD or a large requirements document.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/rp1-run/rp1/phase-plan
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 rp1-run/rp1 --skill phase-plan
Clone the repo
git clone --depth 1 https://github.com/rp1-run/rp1

Made for: Claude Code.

Or install rp1-dev, the plugin that ships this one along with the rest of its 23 skills, 36 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 phase-plan

README.md
[![agentmods](https://agentmods.dev/badge/skills/rp1-run/rp1/phase-plan/github.svg)](https://agentmods.dev/skills/rp1-run/rp1/phase-plan)
Your own site
<a href="https://agentmods.dev/skills/rp1-run/rp1/phase-plan"><img src="https://agentmods.dev/badge/skills/rp1-run/rp1/phase-plan/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 phase-plan

Your own site · 80×15
<a href="https://agentmods.dev/skills/rp1-run/rp1/phase-plan"><img src="https://agentmods.dev/badge/skills/rp1-run/rp1/phase-plan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,537 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 $0.00018 $0.01537
Opus 5 $0.00009 $0.00768
Sonnet 5 $0.00004 $0.00307
Haiku 4.5 $0.00002 $0.00154

Measured 2d ago against content hash 260ec4b4cbd9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

phase-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 2d 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/dev/skills/phase-plan/SKILL.md · 221 lines

How it starts

The opening of the file, as written. The whole thing — 221 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Phase Planning Workflow

YOU ARE A PURE ORCHESTRATOR. Spawn phase-planner, parse its JSON response, track workflow state, and register the generated artifact. Do not write or edit planning artifacts yourself.

Command Contract: /phase-plan <source> [--afk]

§CTX

Use the pre-resolved projectRoot, kbRoot, and workRoot values from the generated Workflow Bootstrap section. Do not hardcode .rp1/work/ or .rp1/context/ paths.

SOURCE is the user-provided planning source path or identifier. It must resolve to either:

  • a PRD under {workRoot}/prds/*.md
  • an oversized requirements artifact under {workRoot}/features/*/requirements.md

UPDATE_CONTEXT is optional revision guidance for refreshing an existing phase plan.

This workflow is single-pass. It does not emit waiting_for_user for source ambiguity. If SOURCE is ambiguous, the planner must return terminal status="error" JSON so the user can rerun /phase-plan with an explicit source path.

STATE-MACHINE

stateDiagram-v2
    [*] --> analyze
    analyze --> publish : plan_ready
    publish --> completed : published
    analyze --> failed : error
    publish --> failed : error
    completed --> [*]
    failed --> [*]

First emit (entering analyze) includes --name:

rp1 agent-tools emit \
  --workflow phase-plan \
  --type status_change \
  --run-id {RUN_ID} \
  --step analyze \
  --name "Phase Plan: {source summary}" \
  --data '{"status": "running"}'

Subsequent transitions omit --name:

rp1 agent-tools emit \
  --workflow phase-plan \
  --type status_change \
  --run-id {RUN_ID} \
  --step {STATE} \
  --data '{"status": "running"}'

Terminal states:

rp1 agent-tools emit \
  --workflow phase-plan \
  --type status_change \
  --run-id {RUN_ID} \
  --step {STATE} \
  --data '{"status": "completed"}'

On failure:

rp1 agent-tools emit \
  --workflow phase-plan \
  --type status_change \
  --run-id {RUN_ID} \
  --step failed \
  --data '{"status": "failed"}'

Read the full file on GitHub · 221 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. 2d ago First seen · 221 lines · 18 tokens per session scan A 260ec4b4cbd9

Subscribe to this mod's changes

phase-plan is a skill published in the GitHub repository rp1-run/rp1 (38 stars, last pushed 3d ago), licensed Apache-2.0. It adds 18 tokens to every session and 1,537 once invoked, about $0.0001 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 2026-09-07.

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