plan

plan is a skill for Claude Code, Codex from lacerbi/dotclaude. It costs 10 tokens per session (1,703 once invoked), scanned A, original, MIT.

A planning process that clarifies a task, explores the project, and produces a detailed plan before execution begins.

In plain words
What is it for?
Use it for tasks that involve several files, components, or decisions and need structured investigation first.
Why use it?
It helps reveal dependencies, existing work, and unknowns before changes are made.

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

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

README.md
[![agentmods](https://agentmods.dev/badge/skills/lacerbi/dotclaude/plan.svg)](https://agentmods.dev/skills/lacerbi/dotclaude/plan)
Your own site
<a href="https://agentmods.dev/skills/lacerbi/dotclaude/plan"><img src="https://agentmods.dev/badge/skills/lacerbi/dotclaude/plan.svg" alt="Measured on agentmods" height="20"></a>
Per session 10 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,703 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 $0.00010 $0.01703
Opus 5 $0.00005 $0.00851
Sonnet 5 $0.00002 $0.00341
Haiku 4.5 $0.00001 $0.00170

Measured 4d ago against content hash cc10ec73b247, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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.

skills/plan/SKILL.md · 187 lines

How it starts

The opening of the file, as written. The whole thing — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are entering PLANNING MODE. Explore and analyze before doing any work.

Phase 1: Task Understanding

State your understanding of the task: $ARGUMENTS

If unclear, use AskUserQuestion to clarify before proceeding.

Assess complexity to calibrate planning depth:

  • Simple: Single-focus task, few components → lighter exploration, concise plan
  • Moderate: Multiple components or unknowns → targeted exploration, structured plan
  • Complex: Cross-cutting concerns, many dependencies → thorough exploration, detailed plan

Phase 2: Exploration

Explore the project to understand what exists and what the task involves. Scale exploration to task complexity.

For simple tasks: You may explore directly without subagents.

For moderate/complex tasks: Spawn Explore agents in parallel (Agent tool, subagent_type='Explore'), each focused on a relevant aspect:

  • Structure Explorer: Project organization, key components, how things connect
  • Prior Work Explorer: Existing similar work, patterns, or approaches to build on
  • Context Explorer: Related materials, dependencies, constraints
  • Domain Explorer: Subject matter, conventions, standards relevant to the task
  • Docs Explorer: Documentation (READMEs, guides, API docs, comments) — what exists in or adjacent to the task area, what will need updating, and what doesn't exist yet but should

(For code-heavy tasks: Architecture, Feature, Dependency, Test explorers may be more appropriate)

Subagent selection: Opus for tasks requiring judgment. Sonnet for straightforward subtasks. Haiku only for trivial read-only tasks.

Instruct Explore agents to:

  • Return hypotheses, not conclusions
  • Provide full file paths for relevant files
  • Identify locations, not deep analysis
  • Be thorough but efficient - scouts, not implementers

Phase 3: Synthesis

After exploration:

  1. Read/verify key files and materials identified
  2. Confirm or refute hypotheses
  3. Build a mental model of the current state and what the task requires
  4. Identify existing documentation that must be updated, and whether any new document has a distinct durable purpose

Read the full file on GitHub · 187 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 · 187 lines · 10 tokens per session scan A cc10ec73b247

Subscribe to this mod's changes

plan is a skill published in the GitHub repository lacerbi/dotclaude (2 stars, last pushed 4d ago), licensed MIT. It adds 10 tokens to every session and 1,703 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 2026-08-31.

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