What is claude-md-maintenance?

Guidance for maintaining a project's CLAUDE.md file, which contains instructions an AI coding assistant reads during work. It focuses on keeping those instructions short, useful, and updated after repeated mistakes.

Use it to decide what belongs in CLAUDE.md, record recurring corrections, keep the file lean, and make project instructions available at the start of sessions and after compaction.

It prevents important project rules from being lost while avoiding a long instruction file that consumes the assistant's working context.

claude-md-maintenance — Skill for Claude Code by sefaertunc

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 sefaertunc/Worclaude --skill claude-md-maintenance

Clone the repo

git clone --depth 1 https://github.com/sefaertunc/Worclaude

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/sefaertunc/worclaude/claude-md-maintenance/github.svg)](https://agentmods.dev/skills/sefaertunc/worclaude/claude-md-maintenance)

Your own site

<a href="https://agentmods.dev/skills/sefaertunc/worclaude/claude-md-maintenance"><img src="https://agentmods.dev/badge/skills/sefaertunc/worclaude/claude-md-maintenance/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/sefaertunc/worclaude/claude-md-maintenance"><img src="https://agentmods.dev/badge/skills/sefaertunc/worclaude/claude-md-maintenance.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,525 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.

Model	Per session	Once invoked
Fable 5.1	$0.00020	$0.01525
Opus 5	$0.00010	$0.00763
Sonnet 5	$0.00004	$0.00305
Haiku 4.5	$0.00002	$0.00153

Measured 10d ago against content hash b74409d4570b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

claude-md-maintenance 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 10d 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.

.claude/skills/claude-md-maintenance/SKILL.md · 171 lines

How it starts

The opening of the file, as written. The whole thing — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md Maintenance

The Self-Healing Pattern

When Claude makes the same mistake twice, it should update CLAUDE.md to prevent a third occurrence. This is "self-healing" — the system learns from its errors.

The cycle:

Claude makes mistake X
User corrects Claude
Claude makes mistake X again
Claude (or user) adds a rule to CLAUDE.md: "Don't do X. Do Y instead."
Mistake X doesn't happen again

This is why the Gotchas section exists. It grows organically from real problems encountered during development.

The 200-Line Target

CLAUDE.md should stay under 200 lines of actual content. This is the official Claude Code guidance and matches worclaude doctor's WARN threshold (150 lines / 30,000 chars) and ERROR threshold (200 lines). It is a target, not a hard limit, but exceeding it significantly means CLAUDE.md is trying to do too much.

Claude reads CLAUDE.md at the start of every session and after every /compact. Long CLAUDE.md files waste context on every single interaction.

What Belongs in CLAUDE.md

YES:

Project identity (name, one-line description)
Key file pointers (PROGRESS.md, SPEC.md)
Tech stack and build/test/run commands
Session protocol (start/during/end)
Critical rules (5-10 maximum)
Gotchas (grows, but prune regularly)
Skills pointer (list of available skills)

NO:

Detailed coding standards (put in a skill)
Architecture documentation (put in a skill or docs/)
API documentation (put in docs/)
Full workflow descriptions (put in a skill)
Things Claude already knows (common language features, standard libraries)

What Belongs in Skills vs CLAUDE.md

CLAUDE.md: things Claude needs to know EVERY session, regardless of task. Skills: things Claude needs to know SOMETIMES, for specific types of work.

Example:

"Use conventional commits" -> CLAUDE.md (applies to every commit)
"Commit message format: type(scope): description, body explains why..." -> skill (only needed when actually writing commits)

Maintaining the Gotchas Section

Read the full file on GitHub · 171 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.

10d ago First seen · 171 lines · 20 tokens per session scan A b74409d4570b

Subscribe to this mod's changes

claude-md-maintenance is a skill published in the GitHub repository sefaertunc/Worclaude (4 stars, last pushed 1mo ago), licensed MIT. It adds 20 tokens to every session and 1,525 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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