pi-vs-claude-code is a collection of customized Pi Coding Agent instances used to compare an open-source coding agent with Claude Code. It is for exploring agent interfaces, orchestration, safety auditing, and integrations between coding agents. The catalogue entries are examples of the customized agent workflows in the collection.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/disler/pi-vs-claude-code/claude-mdgit clone --depth 1 https://github.com/disler/pi-vs-claude-codeWrote 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/disler/pi-vs-claude-code/claude-md)<a href="https://agentmods.dev/instructions/disler/pi-vs-claude-code/claude-md"><img src="https://agentmods.dev/badge/instructions/disler/pi-vs-claude-code/claude-md.svg" alt="Measured on agentmods" 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 | $0.00229 | $0.00229 |
| Opus 5 | $0.00114 | $0.00114 |
| Sonnet 5 | $0.00046 | $0.00046 |
| Haiku 4.5 | $0.00023 | $0.00023 |
Grade A, and why
pi-vs-claude-code 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 5d 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.
What it actually says
Pi vs CC — Extension Playground
Pi Coding Agent extension examples and experiments.
Tooling
- Package manager:
bun(not npm/yarn/pnpm) - Task runner:
just(see justfile) - Extensions run via:
pi -e extensions/<name>.ts
Project Structure
extensions/— Pi extension source files (.ts)specs/— Feature specifications.pi/agents/— Agent definitions for agent-team extension.pi/agent-sessions/— Ephemeral session files (gitignored)
Conventions
- Extensions are standalone .ts files loaded by Pi's jiti runtime
- Available imports:
@mariozechner/pi-coding-agent,@mariozechner/pi-tui,@mariozechner/pi-ai,@sinclair/typebox, plus any deps in package.json - Register tools at the top level of the extension function (not inside event handlers)
- Use
isToolCallEventType()for type-safe tool_call event narrowing
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.
- 5d ago First seen · 21 lines · 229 tokens per session scan A ba8bc7eb6d46
pi-vs-claude-code CLAUDE.md is an instructions file published in the GitHub repository disler/pi-vs-claude-code (1,666 stars, last pushed 1mo ago), licensed MIT. It adds 229 tokens to every session, about $0.0011 per session on Opus 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.
Other instructions, from other repositories
Kokoro-Engine CLAUDE.md
Claude Code instructions for chyinan/Kokoro-Engine, covering claude.md, git 规范, 项目概述, 常用命令 and 安装依赖.
pcl copilot-instructions.md
Copilot instructions for personamanagmentlayer/pcl, covering project overview, pcl bootstrap system, core architecture principles, 1. compiler pipeline and 2. type system.
solo copilot-instructions.md
Copilot instructions for hiero-ledger/solo, covering github copilot instructions for hiero-ledger/solo and highest-frequency rules.
openmcp-client CLAUDE.md
Instructions for LSTM-Kirigaya/openmcp-client, covering claude.md, development commands, setup and installation, development and service development.
bedrock CLAUDE.md
Claude Code instructions for christopher-buss/bedrock, covering bedrock project context, what is bedrock?, architecture, architecture quick reference and testing requirements (non-negotiable).
free-ai-gateway AGENTS.md
Instructions for zaber-dev/free-ai-gateway, covering 🤖 free-ai gateway - agentic development guidelines, 🏛️ monorepo architecture & package boundaries, 🛑 strict architectural rules for agents, 💻 essential developer commands and build all packages across monorepo.