writing-plans

writing-plans is a skill for Claude Code, Codex from jamditis/claude-skills-journalism. It costs 21 tokens per session (1,504 once invoked), scanned A, a copy of writing-plans, MIT.

An implementation-plan writing workflow for multi-step software tasks. It turns a specification into small coding, testing, documentation, and commit tasks for an engineer who has little project context.

In plain words
What is it for?
Use it before implementing a feature or other large change to map the codebase, choose files to edit, define tests, and save a detailed plan.
Why use it?
It reduces the risk of starting to code without understanding the repository, affected files, test approach, or task boundaries. TDD means writing tests to guide development, and a worktree is a separate working copy of a Git repository.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present. Also seen: mentions subagents.

Part of the superjawn plugin — 14 skills shipped together

Good fit Use it before implementing a feature or other large change to map the codebase, choose files to edit, define tests, and save a detailed plan.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jamditis/claude-skills-journalism/writing-plans
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 jamditis/claude-skills-journalism --skill writing-plans
Clone the repo
git clone --depth 1 https://github.com/jamditis/claude-skills-journalism

Made for: Claude Code, Codex.

Or install superjawn, the plugin that ships this one along with the rest of its 14 skills.

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 writing-plans

README.md
[![agentmods](https://agentmods.dev/badge/skills/jamditis/claude-skills-journalism/writing-plans/github.svg)](https://agentmods.dev/skills/jamditis/claude-skills-journalism/writing-plans)
Your own site
<a href="https://agentmods.dev/skills/jamditis/claude-skills-journalism/writing-plans"><img src="https://agentmods.dev/badge/skills/jamditis/claude-skills-journalism/writing-plans/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 writing-plans

Your own site · 80×15
<a href="https://agentmods.dev/skills/jamditis/claude-skills-journalism/writing-plans"><img src="https://agentmods.dev/badge/skills/jamditis/claude-skills-journalism/writing-plans.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,504 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 81% copy Near-identical to another mod 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 $0.00021 $0.01504
Opus 5 $0.00010 $0.00752
Sonnet 5 $0.00004 $0.00301
Haiku 4.5 $0.00002 $0.00150

Measured 7d ago against content hash eba9d7b1f9d4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

writing-plans 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.

Origin

This is a copy

81% identical to writing-plans — 63 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

superjawn/skills/writing-plans/SKILL.md · 161 lines

How it starts

The opening of the file, as written. The whole thing — 161 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Writing Plans

Overview

Write comprehensive implementation plans assuming the engineer has zero context for our codebase and questionable taste. Document everything they need to know: which files to touch for each task, code, testing, docs they might need to check, how to test it. Give them the whole plan as bite-sized tasks. DRY. YAGNI. TDD. Frequent commits.

Assume they are a skilled developer, but know almost nothing about our toolset or problem domain. Assume they don't know good test design very well.

Announce at start: "I'm using the superjawn:writing-plans skill to create the implementation plan."

Context: This should be run in a dedicated worktree (set up via superjawn:using-git-worktrees).

Save plans to: docs/superpowers/plans/YYYY-MM-DD-<feature-name>.md

  • (User preferences for plan location override this default)

Scope Check

If the spec covers multiple independent subsystems, it should have been broken into sub-project specs during brainstorming. If it wasn't, suggest breaking this into separate plans, one per subsystem. Each plan should produce working, testable software on its own.

File Structure

Before defining tasks, map out which files will be created or modified and what each one is responsible for. This is where decomposition decisions get locked in.

  • Design units with clear boundaries and well-defined interfaces. Each file should have one clear responsibility.
  • You reason best about code you can hold in context at once, and your edits are more reliable when files are focused. Prefer smaller, focused files over large ones that do too much.
  • Files that change together should live together. Split by responsibility, not by technical layer.
  • In existing codebases, follow established patterns. If the codebase uses large files, don't unilaterally restructure - but if a file you're modifying has grown unwieldy, including a split in the plan is reasonable.

Read the full file on GitHub · 161 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 161 lines · 21 tokens per session scan A eba9d7b1f9d4

Subscribe to this mod's changes

writing-plans is a skill published in the GitHub repository jamditis/claude-skills-journalism (391 stars, last pushed today), licensed MIT. It adds 21 tokens to every session and 1,504 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 81% identical to writing-plans, differing in 63 lines, and is treated as a copy.

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