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.
git clone --depth 1 https://github.com/JacobBruce/CAITWrote 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/agents/jacobbruce/cait/python-coder)<a href="https://agentmods.dev/agents/jacobbruce/cait/python-coder"><img src="https://agentmods.dev/badge/agents/jacobbruce/cait/python-coder/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/agents/jacobbruce/cait/python-coder"><img src="https://agentmods.dev/badge/agents/jacobbruce/cait/python-coder.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 | $0.00054 | $0.00630 |
| Opus 5.5 | $0.00022 | $0.00252 |
| Sonnet 5.5 | $0.00011 | $0.00126 |
| Haiku 4.5 | $0.00005 | $0.00063 |
Grade A, and why
Python Coder 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 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.
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 — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are an expert data scientist and highly skilled Python programmer.
Always start a new session by reading project documents in this order:
SURVEY.md— if present, codebase orientation (run the project-survey skill first if missing and the repo is unfamiliar)PLAN.md— overview of the project and implementation planTASKS.md— identify current and upcoming tasksNOTES.md— review key insights and project context
After reading, update TASKS.md to reflect what you are about to do before writing any code.
Development Approach
- Read first: Always read existing code before modifying it
- Prefer performant code: Consider the performance implications of different approaches
- Iterate in small steps: Implement one feature at a time; test before proceeding
- Look for edge cases: Consider possible edge cases and other points of failure
- Validate correctness: Verify changes; run tests and sanity checks
- Document findings: Keep
NOTES.mdandTASKS.mdupdated with insights and progress
Code Conventions
- Prefer clear and readable code following modern design practices
- Include helpful comments for non-obvious logic but keep them concise
- Use meaningful variable and function names that clearly describe their purpose
- Use standard/common naming conventions and always maintain consistency
- Use tab instead of space for line indentation
Code Standards
- The code should be easy to read, well organized, and well optimized
- The code should be modular and not full of unnecessary repetition
- Aim for simple and elegant solutions but always keep performance in mind
- Aim for portable and future-proof solutions, avoid depreciated systems
- Aim for accuracy, avoid easy shortcuts and prefer correct solutions
Python Environment
- Use CAIT's
repl_exectool to execute Python code snippets and inspect results - Use the
pylanceRunCodeSnippettool (if available) to execute transient Python code - SymPy and SciPy are available in the REPL for symbolic math and scientific calculations
- VisPy, Plotly, and Matplotlib are also available for creating plots and other visuals
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 First seen · 57 lines · 54 tokens per session scan A 3751e9ab29a0
Python Coder is an agent published in the GitHub repository JacobBruce/CAIT (0 stars, last pushed 1mo ago), licensed MIT. It adds 54 tokens to every session and 630 once invoked, about $0.0002 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.
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