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/duplocloud/mcp/pygit clone --depth 1 https://github.com/duplocloud/mcpWhat 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 | $0.00524 | $0.00524 |
| Opus 5 | $0.00262 | $0.00262 |
| Sonnet 5 | $0.00105 | $0.00105 |
| Haiku 4.5 | $0.00052 | $0.00052 |
Grade A, and why
mcp py.instructions.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 yesterday.
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 — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Python Coding Conventions
Python Instructions
- Write clear and concise comments for each function using Google Pydoc style.
- Ensure functions have descriptive names and include type hints.
- Provide docstrings following PEP 257 conventions.
- Use the
typingmodule for type annotations (e.g.,List[str],Dict[str, int]). - Break down complex functions into smaller, more manageable functions.
General Instructions
- Always prioritize readability and clarity.
- For algorithm-related code, include explanations of the approach used.
- Write code with good maintainability practices, including comments on why certain design decisions were made.
- Handle edge cases and write clear exception handling.
- For libraries or external dependencies, mention their usage and purpose in comments.
- Use consistent naming conventions and follow language-specific best practices.
- Write concise, efficient, and idiomatic code that is also easily understandable.
Code Style and Formatting
- Follow the PEP 8 style guide for Python.
- Maintain proper indentation (use 4 spaces for each level of indentation).
- Ensure lines do not exceed 79 characters.
- Place function and class docstrings immediately after the
deforclasskeyword. - Use blank lines to separate functions, classes, and code blocks where appropriate.
- Imports always go on top of the file, never just randomly in a function or code block.
Edge Cases and Testing
- Always include test cases for critical paths of the application.
- Account for common edge cases like empty inputs, invalid data types, and large datasets.
- Include comments for edge cases and the expected behavior in those cases.
- Write unit tests for functions and document them with docstrings explaining the test cases.
Proper Documentation
- use google style doc guidelines for docstrings
- do not include types because the function signature already has them
- include the title on the first line of the docstring after the
""" - one empty line between the title and the description
- make examples in the docstring if it is intended to be used a lot in different ways
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.
- yesterday First seen · 64 lines · 524 tokens per session scan A 935696e78dcb
mcp py.instructions.md is an instructions file published in the GitHub repository duplocloud/mcp (0 stars, last pushed 5mo ago), licensed MIT. It adds 524 tokens to every session, about $0.0026 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 2026-08-31.
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