What is succinctly CLAUDE.md?

Repository instructions for Claude Code in succinctly, including its skills, project overview, knowledge wiki, and scratch directory.

Use them when working in the succinctly repository so requests activate the relevant skill and follow the project's documented conventions.

They help the coding agent choose the right local guidance for tasks such as testing, SIMD optimisation, parsing, documentation, and commit messages.

How rust-works/succinctly configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to rust-works/succinctly. 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/rust-works/succinctly/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/rust-works/succinctly

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/rust-works/succinctly/claude-md/github.svg)](https://agentmods.dev/instructions/rust-works/succinctly/claude-md)

Your own site

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

Per session 10,611 This file is loaded in full into every session.

When invoked 10,611 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	$0.10611	$0.10611
Opus 5.5	$0.04244	$0.04244
Sonnet 5.5	$0.02122	$0.02122
Haiku 4.5	$0.01061	$0.01061

Measured 4d ago against content hash 3a1690b51028, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

succinctly 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.

CLAUDE.md · 516 lines

How it starts

The opening of the file, as written. The whole thing — 516 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.

Skills Reference

Detailed guidance is organized into skills in .claude/skills/. Claude will auto-invoke these based on context:

Skill	Triggers	Purpose
benchmark-docs	"benchmark", "update benchmarks"	Platform-specific benchmark documentation
markdown-tables	"format table", "align table"	Fixed-width table formatting
simd-optimization	"SIMD", "AVX", "NEON", "vectorization"	SIMD patterns and learnings
bit-optimization	"rank", "select", "popcount", "lookup table"	Bit-level optimization patterns
json-semi-indexing	"JSON index", "semi-index", "cursor"	JSON parsing implementation details
yaml-semi-indexing	"YAML index", "YAML parser", "sequence item"	YAML parsing and debugging patterns
testing	"test", "assert", "coverage", "regression"	Test quality patterns and anti-patterns
commit-msg	"commit message", "amend commit"	Conventional commits format
knowledge-map	"knowledge map", "wiki", "update wiki"	Maintain docs/ knowledge wiki
skill-writing	"create skill", "SKILL.md", "write skill"	Best practices for writing Claude skills

Knowledge Wiki

A structured knowledge base for this codebase lives in docs/. Start at docs/index.md for a concept-oriented map of how the data structures, algorithms, SIMD implementations, and benchmarks relate to each other. The wiki pages cross-link to existing architecture docs, parsing docs, source files, and academic papers.

Read the full file on GitHub · 516 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.

4d ago Changed · -531 lines · -13,037 tokens per session 3a1690b51028
5d ago Changed · +3 lines · +114 tokens per session e78b0dd6da98
6d ago Changed · +14 lines · +283 tokens per session 4b3619eba790
7d ago Changed · +18 lines · +344 tokens per session 71b7745db0ef
8d ago Changed · +17 tokens per session 271209f49a29
9d ago Changed · +1 lines · +28 tokens per session fd3b57536b3c
10d ago Changed · +10 lines · +324 tokens per session 7fefdd13c7c8
12d ago Changed · +18 lines · +345 tokens per session 39f512aa1f9e
16d ago Changed · +9 lines · +192 tokens per session f6ac466755c5
18d ago First seen · 974 lines · 22,001 tokens per session scan A e518974a67da

Subscribe to this mod's changes

succinctly CLAUDE.md is an instructions file published in the GitHub repository rust-works/succinctly (52 stars, last pushed yesterday), licensed MIT. It adds 10,611 tokens to every session, about $0.0424 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.

succinctly CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
succinctly CLAUDE.mdrust-works/succinctly	Instructions file	52	yesterday	MIT	A	10,611	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

succinctly: Instructions file for Claude Code