What is markplane CLAUDE.md?

Repository instructions for Markplane, a project-management system that uses Markdown files as its source of truth and provides Rust command-line and web interfaces.

Use them when building, testing, linting, installing, or changing the Markplane Rust workspace and its optional React web interface.

They give coding agents the project's architecture, required tool versions, build and test commands, and repository conventions.

How zerowand01/markplane configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to zerowand01/markplane. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/zerowand01/markplane/master/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/zerowand01/markplane

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/instructions/zerowand01/markplane/claude-md/github.svg)](https://agentmods.dev/instructions/zerowand01/markplane/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/zerowand01/markplane/claude-md"><img src="https://agentmods.dev/badge/instructions/zerowand01/markplane/claude-md/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/instructions/zerowand01/markplane/claude-md"><img src="https://agentmods.dev/badge/instructions/zerowand01/markplane/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 826 This file is loaded in full into every session.

When invoked 826 The same file — it is already loaded in full.

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	$0.00826	$0.00826
Opus 5.5	$0.00330	$0.00330
Sonnet 5.5	$0.00165	$0.00165
Haiku 4.5	$0.00083	$0.00083

Measured 1mo ago against content hash fbc3537a2bfd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

markplane 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 1mo 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.md · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

Markplane is an AI-native, markdown-first project management system. "Mark" (markdown) + "plane" (control plane). The repo itself is the project manager — no database, no SaaS. Files are the source of truth, git is the changelog.

Tech stack: Rust CLI binary with integrated MCP server (markplane mcp subcommand) wrapping a shared core library. React + Tailwind web UI via markplane serve.

Build & Test

Requires Rust 1.93.0+ (edition 2024). Web UI also requires Node.js 18+.

cargo build --workspace              # Build all crates
cargo test --workspace               # Run all tests
cargo clippy --workspace             # Lint (must be warning-free)

Web UI (optional):

cd crates/markplane-web/ui && npm install && npm run build   # Build frontend
cargo install --path crates/markplane-cli --features embed-ui # Single binary with embedded UI

After code changes, cargo install --path crates/markplane-cli to update the local markplane binary.

Workspace Structure

Crate	Type	Role
`markplane-core`	Library	Data models, CRUD, sync, references, context generation
`markplane-cli`	Binary (`markplane`)	CLI commands, MCP server (`markplane mcp`), web server (`markplane serve`)
`markplane-web/ui`	Next.js app	React + Tailwind frontend (static export, optionally embedded via `rust-embed`)

Key Conventions

Error handling: thiserror/MarkplaneError in core, anyhow in CLI, Result<String, String> in MCP tool handlers
No regex: Reference extraction ([[ID]]) uses manual byte scanning
serde_yaml 0.9: Deprecated but kept — serde_yml is too immature
Integration tests: Use cargo_bin_cmd!() macro (not deprecated Command::cargo_bin())
Derived files: INDEX.md and .context/ are gitignored within .markplane/ — fully regenerated by markplane sync
Auto-sync: Runs on markplane init, markplane mcp startup, and markplane serve startup
ID system: {PREFIX}-{RANDOM} with 5-char alphanumeric suffix (no sequential counters)

Read the full file on GitHub · 67 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.

1mo ago First seen · 67 lines · 826 tokens per session scan A fbc3537a2bfd

Subscribe to this mod's changes

markplane CLAUDE.md is an instructions file published in the GitHub repository zerowand01/markplane (191 stars, last pushed 3d ago), licensed Apache-2.0. It adds 826 tokens to every session, about $0.0033 per session on Opus 5.5. 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 2026-08-30.

Claude Code Project management ai ai-native cli cursor developer-tools

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,715 tokens

markplane: Instructions file for Claude Code

Borrowing it

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

CLAUDE.md

Project Overview

Build & Test

Workspace Structure

Key Conventions

What this file has done since we first saw it

Other instructions, from other repositories

vscode buildNext.instructions.md

next.js AGENTS.md

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langchain AGENTS.md

vscode copilot-instructions.md

vscode model-prompts.instructions.md