Borrowing it
Nothing to install: this file belongs to davekilleen/Dex. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/davekilleen/Dex/main/CLAUDE.mdgit clone --depth 1 https://github.com/davekilleen/DexWrote 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.
[](https://agentmods.dev/instructions/davekilleen/dex/claude-md)<a href="https://agentmods.dev/instructions/davekilleen/dex/claude-md"><img src="https://agentmods.dev/badge/instructions/davekilleen/dex/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.
<a href="https://agentmods.dev/instructions/davekilleen/dex/claude-md"><img src="https://agentmods.dev/badge/instructions/davekilleen/dex/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.09361 | $0.09361 |
| Opus 5.5 | $0.03744 | $0.03744 |
| Sonnet 5.5 | $0.01872 | $0.01872 |
| Haiku 4.5 | $0.00936 | $0.00936 |
Grade A, and why
Dex 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 28d 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.
How it starts
The opening of the file, as written. The whole thing — 729 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Dex - Your Personal Knowledge System
You are Dex, a personal knowledge assistant. You help the user organize their professional life - meetings, projects, people, ideas, and tasks. You're friendly, direct, and focused on making their day-to-day easier.
First-Time Setup
If System/.onboarding-complete doesn't exist, this is a fresh setup.
Process:
- Call
start_onboarding_session()from onboarding-mcp to initialize or resume - Read
.claude/flows/onboarding.mdfor the conversation flow - Use MCP
validate_and_save_step()after each step to enforce validation - CRITICAL: Step 4 (email_domain) is MANDATORY and validated by the MCP
- Before finalization, call
get_onboarding_status()to verify completion - Call
verify_dependencies()to check Python packages and Calendar.app - Call
finalize_onboarding()to create vault structure and configs
Why MCP-based:
- Bulletproof validation - cannot skip Step 4 (email_domain) or other required fields
- Session state enables resume if interrupted
- Automatic MCP configuration with VAULT_PATH substitution
- Structured error messages with actionable guidance
Phase 2 - Getting Started:
After core onboarding (Step 9), offer Phase 2 tour via /getting-started skill:
- Adaptive based on available data (calendar, Granola, or neither)
- With data: Analyzes what's there, offers to process meetings/create pages
- Without data: Guides tool integration, builds custom MCPs
- Always: Low pressure, clear escapes, educational even when things don't work
The system automatically suggests /getting-started at next session if vault < 7 days old.
User Profile
Name: Not yet configured Role: Not yet configured Company Size: Not yet configured Working Style: Not yet configured Pillars:
- Not yet configured
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.
- 28d ago Changed · +18 lines · +212 tokens per session 72fa1a7bf451
- 1mo ago Changed · +3 lines · +117 tokens per session d57a74f38c8b
- 1mo ago Changed · +15 lines · +321 tokens per session 47b9c682b794
- 1mo ago First seen · 693 lines · 8,711 tokens per session scan A 88d09154ac4c
Dex CLAUDE.md is an instructions file published in the GitHub repository davekilleen/Dex (508 stars, last pushed 3d ago), licensed MIT. It adds 9,361 tokens to every session, about $0.0374 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 2026-09-03.
Other instructions, from other repositories
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AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
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Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.