Borrowing it
Nothing to install: this file belongs to zhurong2020/pyobfus. 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/zhurong2020/pyobfus/main/AGENTS.mdgit clone --depth 1 https://github.com/zhurong2020/pyobfusWrote 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/zhurong2020/pyobfus/agents-md)<a href="https://agentmods.dev/instructions/zhurong2020/pyobfus/agents-md"><img src="https://agentmods.dev/badge/instructions/zhurong2020/pyobfus/agents-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/zhurong2020/pyobfus/agents-md"><img src="https://agentmods.dev/badge/instructions/zhurong2020/pyobfus/agents-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 | $0.03166 | $0.03166 |
| Opus 5.5 | $0.01266 | $0.01266 |
| Sonnet 5.5 | $0.00633 | $0.00633 |
| Haiku 4.5 | $0.00317 | $0.00317 |
Grade A, and why
pyobfus AGENTS.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 2d 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 — 228 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md — pyobfus
Canonical, tool-agnostic guide for AI coding agents (and humans) working on
the pyobfus codebase. Tool-specific files defer here: CLAUDE.md imports this
file; Cursor / Windsurf / Aider / Codex read AGENTS.md natively.
Looking to use pyobfus to protect your own code, not develop it? See the
pyobfus-reviewskill (read-only: should we obfuscate this, and what breaks?), thepyobfus-protectskill (do it, and verify the result), and thetemplates/ai-integration/rule files instead.
What this project is
pyobfus is an AST-based Python code obfuscator — framework-aware presets, reverse stack-trace mapping for AI-assisted debugging, and a machine-readable JSON CLI. A transparent, open-source alternative to PyArmor. The repo ships three Python distributions:
pyobfus/— the obfuscator (CLI + library). Published aspyobfus.pyobfus_mcp/— an MCP server exposing the tools to AI agents. Published aspyobfus-mcp.pyobfus_runtime/— the minimal redistributable runtime used by generated Pro artifacts. Published separately aspyobfus-runtime; it is not part of the Apache-2.0 core.
Plus pyobfus_pro/ (commercial, license-gated features) kept source-separated
from the Apache-2.0 core.
Setup
Use the repository-local venv/ on WSL/Linux. If a .venv/ directory
shows up, it is a Windows-side legacy environment (the checkout moved from a
Windows-synced folder into WSL on 2026-09-21 and did not carry it over); WSL
cannot reliably run its executables, so don't use it. Either activate venv/
first, or call tools through venv/bin/... directly.
Operational boundary: perform all local development, testing, builds,
release preparation, and maintainer commands for pyobfus Core, MCP, runtime,
and pyobfus-action from their WSL checkouts under ~/projects/.
OneDrive copies are migration remnants or backups only: do not edit, execute,
build, commit, tag, or publish from them. Hosted GitHub Actions CI/release jobs
remain the expected remote exception to this local WSL-only rule.
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.
- 2d ago Changed · +10 tokens per session 4767d0709482
- 3d ago Changed · +20 lines · +343 tokens per session 6e68ab39ab2a
- 21d ago Changed · +23 lines · +307 tokens per session c27f5243b917
- 24d ago Changed · +5 lines · +99 tokens per session 635db3803a41
- 1mo ago Changed · +11 lines · +165 tokens per session 065c33254e5c
- 1mo ago Changed · +1 lines · +33 tokens per session 042a2c6101a8
- 1mo ago Changed · +4 lines · +77 tokens per session efe571452426
- 1mo ago Changed · +7 lines · +143 tokens per session b69f0d1f0ca5
- 1mo ago Changed · +17 lines · +215 tokens per session 40b1b0536a75
- 1mo ago First seen · 140 lines · 1,774 tokens per session scan A fb3422515ea6
pyobfus AGENTS.md is an instructions file published in the GitHub repository zhurong2020/pyobfus (11 stars, last pushed today), licensed Apache-2.0. It adds 3,166 tokens to every session, about $0.0127 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 2026-08-31.
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.
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.
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).