coding-standards

A collection of coding rules for Numaira projects covering file structure, errors, comments, code style, and architecture.

In plain words
What is it for?
Use it to guide the organization and implementation of Python code, including classes, data structures, command-line tools, documentation, and error handling.
Why use it?
It gives the coding agent consistent project-specific instructions, such as file size limits, import choices, validation points, and error-handling behavior.

Cursor rule for Cursor

Install

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.

agentmods
npx agentmods add rules/numaira-technology/weclaw-cua/coding-standards
Clone the repo
git clone --depth 1 https://github.com/Numaira-Technology/weclaw-cua

Made for: Cursor.

Per session 317 This file is loaded in full into every session.
When invoked 317 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00317 $0.00317
Opus 5 $0.00159 $0.00159
Sonnet 5 $0.00063 $0.00063
Haiku 4.5 $0.00032 $0.00032

Measured 2d ago against content hash 9ab121bc0b43, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

coding-standards 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.

.cursor/rules/coding-standards.mdc · 47 lines

What it actually says

Coding Standards

File Organization

  • One class per file, named after the class
  • One concept per file, group by purpose
  • 200 lines max per file; split by responsibility if exceeded
  • Minimal __init__.py: only re-export public interface
  • Lazy imports for heavy dependencies (import inside functions)

Error Handling

  • No fallback logic: crash on invalid input with assert
  • No defensive try/except: let errors propagate unless recovery is meaningful
  • Validate at entry points, not deep in call stack
  • When running into errors, do not creat workarounds and actually tackle the underlying problem

Comments

  • Top docstring only; no inline comments
  • Script docstrings must include: brief description, usage, input spec, output spec
  • For directories: show tree structure with representative files
  • For files (JSON, txt, etc.): show schema or example structure
  • Explain non-obvious fields or formats

Code Style

  • Prefer composition over inheritance
  • Use dataclasses for data structures
  • Keep functions pure when possible

Architecture

  • Separate CLI parsing from core logic, and use more CLI to enable flexibility
  • Always write a submit.sh file for large cli pipeline.
  • Shared utilities in a dedicated directory, keep files organized in dirs!

Naming

  • snake_case: files, functions, variables
  • PascalCase: classes
  • Descriptive names over abbreviations
Changes

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.

  1. 2d ago First seen · 47 lines · 317 tokens per session scan A 9ab121bc0b43

Subscribe to this mod's changes

coding-standards is a cursor rule published in the GitHub repository Numaira-Technology/weclaw-cua (32 stars, last pushed 22d ago), licensed Apache-2.0. It adds 317 tokens to every session, about $0.0016 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.