python-app

python-app is a cursor rule for Cursor from iloveitaly/llm-ide-rules. It costs 2,010 tokens per session, scanned A, original, MIT.

A set of rules for structuring a Python application, including its reusable code, web routes, data models, configuration, and internal commands.

In plain words
What is it for?
It guides work on FastAPI routes, SQLModels database models, application setup, helper modules, and internal commands.
Why use it?
It keeps different kinds of Python code in predictable places and standardizes how the application starts and configures itself.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/. Also seen: positional $N argument.

Good fit It guides work on FastAPI routes, SQLModels database models, application setup, helper modules, and internal commands.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/iloveitaly/llm-ide-rules/python-app
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.

Clone the repo
git clone --depth 1 https://github.com/iloveitaly/llm-ide-rules

Made for: Cursor.

Wrote 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.

agentmods badge for python-app

README.md
[![agentmods](https://agentmods.dev/badge/rules/iloveitaly/llm-ide-rules/python-app/github.svg)](https://agentmods.dev/rules/iloveitaly/llm-ide-rules/python-app)
Your own site
<a href="https://agentmods.dev/rules/iloveitaly/llm-ide-rules/python-app"><img src="https://agentmods.dev/badge/rules/iloveitaly/llm-ide-rules/python-app/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.

agentmods 80×15 button for python-app

Your own site · 80×15
<a href="https://agentmods.dev/rules/iloveitaly/llm-ide-rules/python-app"><img src="https://agentmods.dev/badge/rules/iloveitaly/llm-ide-rules/python-app.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,010 This file is loaded in full into every session.
When invoked 2,010 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.02010 $0.02010
Opus 5.5 $0.00804 $0.00804
Sonnet 5.5 $0.00402 $0.00402
Haiku 4.5 $0.00201 $0.00201

Measured yesterday against content hash 12ecbdf5be59, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

python-app 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.

.cursor/rules/python-app.mdc · 181 lines

How it starts

The opening of the file, as written. The whole thing — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Python App

Here's how the python application is organized:

  • app/lib/ is for code that is not specified to this application and with some effort could extracted into a external package.
  • app/helpers is for larger reusable modules that if they weren't specific to this application, could be extracted into their own package.
  • app/utils are small helper functions that are specific to a particular page or area of the application.
  • app/__init__.py is the entrypoint for the application which is run when anything is executed (fastapi, celery, etc).
    • It primarily runs configure_* commands for any app.configuration.* modules. These modules primary setup API clients, database connections, python language configuration, etc.
    • Also makes sure anything that mutates global state loads early.
  • FastAPI server and routes are specified in app/routes/
  • SQLModels are specified in app/models/
  • Files within app/commands/ should have:
    • Are not designed for CLI execution, but instead are interactor-style internal commands.
    • Should not be used on the queuing system
    • A perform function that is the main entry point for the command.
    • Look at existing commands for examples of how to structure the command.
    • Use TypeID for any parameters that are IDs of models.
  • Files within app/jobs/ should have:
    • Are designed for use on the queuing system.
    • A perform function that is the main entry point for the job.
    • Look at existing jobs for examples of how to structure the job.
    • Use TypeID | str for any parameters that are IDs of models.
  • When referencing a command, use the full-qualified name, e.g. app.commands.transcript_deletion.perform.
  • When queuing a job or performing it in a test, use the full-qualified name, e.g. app.jobs.transcript_deletion.perform.
  • app/cli/ is for scripts or CLI tools that are specific to the application.
  • Webhooks should be fired in the model layer, not in a router or command.
  • Lifecycle logic (status/state transitions, webhook enqueue, access grants) should live on the model. Commands, routes, etc should not re-implement after_save-style logic.
  • Alias classes which are commonly used in the application. This makes it easier to grep for instances of that class without worrying about namespace clashes.
    • Example: from botocore.exceptions import ClientError as BotoCoreClientError instead of a plain ClientError.
    • BaseModel from activemodel is commonly used in models/*.py, so pydantic's BaseModel should be aliased to PydanticBaseModel

Read the full file on GitHub · 181 lines

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. yesterday Changed · +2 lines 12ecbdf5be59
  2. 12d ago Changed · +36 lines · +292 tokens per session e25783272451
  3. 19d ago Changed · +3 lines · +101 tokens per session 1ba0ce9e26d1
  4. 21d ago Changed · -1 lines 80c7c6847d1a
  5. 27d ago Changed · +7 lines · +93 tokens per session 734e6ad30858
  6. 1mo ago Changed · +14 lines · +228 tokens per session 6e94cf7698d0
  7. 1mo ago First seen · 120 lines · 1,296 tokens per session scan A aef4b52e23b3

Subscribe to this mod's changes

python-app is a cursor rule published in the GitHub repository iloveitaly/llm-ide-rules (13 stars, last pushed yesterday), licensed MIT. It adds 2,010 tokens to every session, about $0.0080 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 2026-08-30.