shipkit-claude-md

shipkit-claude-md is a skill for Claude Code, Codex from stefan-stepzero/shipkit. It costs 45 tokens per session (1,594 once invoked), scanned A, original, MIT.

A way to save project knowledge and working preferences in a file called CLAUDE.md, so future coding sessions can use them.

In plain words
What is it for?
Use it to add preferences, project lessons, or context to CLAUDE.md. It can also update folder-specific CLAUDE.md files when those exist.
Why use it?
It avoids repeating the same instructions and lessons every time work resumes. It only updates the file when you explicitly ask it to remember something.

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/stefan-stepzero/shipkit/shipkit-claude-md
Any agent
npx skills add stefan-stepzero/shipkit --skill shipkit-claude-md
Clone the repo
git clone --depth 1 https://github.com/stefan-stepzero/shipkit

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 shipkit-claude-md

README.md
[![agentmods](https://agentmods.dev/badge/skills/stefan-stepzero/shipkit/shipkit-claude-md.svg)](https://agentmods.dev/skills/stefan-stepzero/shipkit/shipkit-claude-md)
Your own site
<a href="https://agentmods.dev/skills/stefan-stepzero/shipkit/shipkit-claude-md"><img src="https://agentmods.dev/badge/skills/stefan-stepzero/shipkit/shipkit-claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,594 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 $0.00045 $0.01594
Opus 5 $0.00023 $0.00797
Sonnet 5 $0.00009 $0.00319
Haiku 4.5 $0.00005 $0.00159

Measured 4d ago against content hash 17db4b476987, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

shipkit-claude-md 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.

install/skills/shipkit-claude-md/SKILL.md · 278 lines

How it starts

The opening of the file, as written. The whole thing — 278 lines — stays where its author put it; the contents beside it link to each section on GitHub.

shipkit-claude-md

Update CLAUDE.md so future sessions and subagents automatically inherit learnings and context.


When to Invoke

Explicit triggers:

  • /claude-md <content> — with inline content
  • /claude-md — prompts for what to add
  • /shipkit-claude-md

Natural language triggers:

  • "Update CLAUDE.md"
  • "Add to CLAUDE.md"
  • "Update my claude md"
  • "Remember this"
  • "Save this for next time"

Important: Never auto-suggest. Only act when user explicitly requests persistence.


Prerequisites

Required:

  • Root CLAUDE.md exists (installed by Shipkit)
  • CLAUDE.md has ## Working Preferences and ## Project Learnings sections

Optional:

  • Subfolder CLAUDE.md files for folder-specific learnings

Important distinction:

  • CLAUDE.md → User-editable (preferences, learnings) — THIS skill edits this file
  • .claude/rules/shipkit.md → Framework-managed (skills reference, core rules) — DO NOT edit

Process

Step 1: Get the Learning

If invoked with content:

/teach use date-fns instead of moment.js

→ Learning = "use date-fns instead of moment.js"

If invoked without content:

/teach

→ Ask: "What would you like me to remember?"

Step 2: Classify Type

Learning About... Type Target Section
How Claude behaves Style ## Working Preferences
Code patterns/libraries Technical ## Project Learnings

Examples:

  • "Be more concise" → Style → Working Preferences
  • "Use date-fns not moment" → Technical → Project Learnings
  • "Always confirm before deleting" → Style → Working Preferences
  • "API returns {data:[]} wrapper" → Technical → Project Learnings

Step 3: Determine Scope

Check for existing CLAUDE.md files:

Glob("**/CLAUDE.md")

Present options:

Where should this apply?

  [1] Project-wide (root CLAUDE.md)
  [2] frontend/ (frontend/CLAUDE.md)
  [3] Other path: ___

If user picks a folder without CLAUDE.md, offer to create one.

Read the full file on GitHub · 278 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 · 278 lines · 45 tokens per session scan A 17db4b476987

Subscribe to this mod's changes

shipkit-claude-md is a skill published in the GitHub repository stefan-stepzero/shipkit (1 stars, last pushed 1mo ago), licensed MIT. It adds 45 tokens to every session and 1,594 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 2026-08-31.