Borrowing it
Nothing to install: this file belongs to tslateman/duet. 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/tslateman/duet/main/CLAUDE.mdgit clone --depth 1 https://github.com/tslateman/duetWrote 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/tslateman/duet/claude-md)<a href="https://agentmods.dev/instructions/tslateman/duet/claude-md"><img src="https://agentmods.dev/badge/instructions/tslateman/duet/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/tslateman/duet/claude-md"><img src="https://agentmods.dev/badge/instructions/tslateman/duet/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 | $0.01174 | $0.01174 |
| Opus 5.5 | $0.00470 | $0.00470 |
| Sonnet 5.5 | $0.00235 | $0.00235 |
| Haiku 4.5 | $0.00117 | $0.00117 |
Grade B, and why
duet CLAUDE.md scanned grade B with 1 finding 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.
Unrestricted tool accessmediumExcessive agency
A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.
- `allowed-tools`: Optional. Omit to allow all tools How it starts
The opening of the file, as written. The whole thing — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Duet
Claude Code plugin for reflection, code quality, writing, and design. Markdown only, no build system.
Lint
markdownlint commands/**/*.md skills/**/SKILL.md
Project Structure
commands/
capture-memory.md Capture learnings to MEMORY.md
lint.md Run markdownlint on files
memory-audit.md Audit project memory files for staleness
ponder.md Surface a question worth sitting with
probe.md Probe recent changes with pointed questions
skills/
FRAMEWORKS.md Framework-to-skill index
adr/ Architecture Decision Records (Nygard)
automagic-problem-discovery/ Friction audit that ends in a built tool (5 Whys)
caveman/ Ultra-compressed output mode (~75% token reduction)
debrief/ Review agent work, surface loose ends
debugging/ Systematic debugging (Agans)
design/ Intentional design (visual, API, system)
excalidraw/ Programmatic Excalidraw diagrams
grill-with-docs/ Interview-driven design with CONTEXT.md/ADR upkeep
ia/ Information architecture (Rosenfeld + Diataxis + LATCH + Brown)
improve-codebase-architecture/ Find deepening opportunities (Ousterhout + Feathers)
lexicon/ Controlled vocabulary across surfaces (Z39.19 + Evans)
mermaid/ Mermaid.js diagrams for GitHub markdown
naming/ Naming as design diagnostic (Benner + Bloch)
performance/ Profiling and optimization (Knuth)
prose/ Strunk's Elements of Style for all writing
research/ Systematic technical investigation
retro/ Session retrospective
review/ Structured code review with context capture
sweep/ Post-op audit for artifacts, damage, stale refs
testing/ Test strategy (Beck's Test Desiderata)
vamp/ Survey the project, choose what to play next
vibe-check/ Judgment linter for vibe-coded output
visual-recap/ Structured visual recap of a diff (BuilderIO)
wayfinding/ Cold-entry orientation audit (Lynch + Pirolli & Card)
writing-great-skills/ Reference for writing skills well (mattpocock)
zoom-out/ Map callers and neighbors before reading details
agents/
code-simplifier.md Refine code for clarity and maintainability
statusline/
statusline-command.sh Lean status bar (dir, git, model, context, vim)
scripts/
generate-readme.sh Auto-generate README tables from source
evals/
evals.json Master eval registry (generated from the scenario tree)
run.sh Eval runner (with/without skill + grader)
<skill>/<scenario>/ 43 scenarios covering 14 of the 25 skills; vibe-check has 4, the rest 3 each
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 Changed · +2 lines · +41 tokens per session d953d3884873
- 1mo ago First seen · 122 lines · 1,133 tokens per session scan B 2ca393349fcf
duet CLAUDE.md is an instructions file published in the GitHub repository tslateman/duet (1 stars, last pushed 1mo ago), licensed MIT. It adds 1,174 tokens to every session, about $0.0047 per session on Opus 5.5. A static security scan graded it B with 1 finding (unrestricted tool access). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other instructions, from other repositories
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).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.