What is Acumen CLAUDE.md?

Project instructions for Acumen, a framework for organizing reusable AI-agent skills and product knowledge. They describe where skills, links, and project-specific context files belong.

Use them when creating or updating an Acumen skill, its agent-facing copies, or project context such as competitors, personas, and features.

They provide consistent rules for adding skills and keeping the versions used by different coding agents aligned.

How VGrss/Acumen configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to VGrss/Acumen. 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/VGrss/Acumen/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/VGrss/Acumen

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/vgrss/acumen/claude-md/github.svg)](https://agentmods.dev/instructions/vgrss/acumen/claude-md)

Your own site

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

Per session 520 This file is loaded in full into every session.

When invoked 520 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	$0.00520	$0.00520
Opus 5.5	$0.00208	$0.00208
Sonnet 5.5	$0.00104	$0.00104
Haiku 4.5	$0.00052	$0.00052

Measured 2mo ago against content hash 4cec57d9f6b3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Acumen 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 2mo 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 · 50 lines

What it actually says

Acumen

Product fluency framework for AI. Skills live in source/skills/ (source of truth) and are distributed via .agents/skills/ and .claude/skills/ (symlinks).

Structure

source/skills/{name}/SKILL.md — source of truth for each skill
.agents/skills/ — distributable copies (agents.md spec)
.claude/skills/ — symlinks to .agents/skills/ for Claude Code

Adding a new skill

Create source/skills/{skill-name}/SKILL.md with YAML frontmatter
Copy to .agents/skills/{skill-name}/SKILL.md
Create symlink: ln -sf ../../.agents/skills/{skill-name} .claude/skills/{skill-name}
Update README.md command table

Skill format

All skills use the agents.md spec:

---
name: skill-name
description: "What the skill does"
user-invocable: true          # omit for core skill
argument-hint: "[target]"     # optional
---

Context files (per-project, gitignored)

.acumen.md — product context generated by /teach-acumen
.acumen/competitors.md — maintained by /scout
.acumen/personas.md — maintained by /persona
.acumen/features.md — maintained by /features
.acumen/value-chain.md — maintained by /teach-acumen, updated by /profile, /diagnose, and /workshop (map + opportunities against extension points)
.acumen/sources.md — data source configuration (analytics, DB, backlog)
.acumen/value.md — maintained by /value
.acumen/reports/ — point-in-time outputs from /diagnose and /workshop

Skill layers

Context: /teach-acumen, /scout, /persona, /features, /value
Audit: /orientation, /defensibility, /diagnose
Ideate: /workshop
Craft: /roadmap, /increment, /critique-product
Communicate: /narrate, /changelog
Meta: /catchup, /update-acumen, /cheatsheet, /feedback

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.

2mo ago First seen · 50 lines · 520 tokens per session scan A 4cec57d9f6b3

Subscribe to this mod's changes

Acumen CLAUDE.md is an instructions file published in the GitHub repository VGrss/Acumen (12 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 520 tokens to every session, about $0.0021 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.

Building agents

Acumen CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
Acumen CLAUDE.mdVGrss/Acumen	Instructions file	12	3mo ago	Apache-2.0	A	520	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	today	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

Acumen: Instructions file for Claude Code