standalone-python-scripts

A command-writing guide for standalone Python scripts: single files that declare their Python version and dependencies in the file itself.

In plain words
What is it for?
Use it when creating self-contained Python command-line scripts with uv, declared dependencies, and structured logs.
Why use it?
It gives scripts a repeatable way to run with their required setup without installing packages manually with pip.

Command for Claude Code

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

Made for: Claude Code.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 285 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00000 $0.00285
Opus 5 $0.00000 $0.00143
Sonnet 5 $0.00000 $0.00057
Haiku 4.5 $0.00000 $0.00028

Measured 2d ago against content hash cc89667b0cc2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

standalone-python-scripts 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.

.claude/commands/standalone-python-scripts.md · 34 lines

What it actually says

Standalone Python Scripts

Use this header:

#!/usr/bin/env -S uv run --script
# /// script
# requires-python = ">=3.13"
# dependencies = []
# ///
  • Specify dependencies via the dependencies variable in the above comment
  • Do not install packages with pip or any other package manager, assume packages will be installed when needed using uv run --script.
  • Use click for CLI interfaces
  • When listing constants at the top of the file, include a newline between entries and (for non-obvious constants) document each constant with a comment:
# matches full lowercase git shas (short or full)
SHA_REGEX = re.compile(r"^[0-9a-f]{7,40}$")

# matches any char not allowed in dns labels
SAFE_CHARS_REGEX = re.compile(r"[^a-z0-9-]")

DEFAULT_ENVIRONMENT_NAME = "production"
DEFAULT_SERVICE_NAME = "Postgres"

CLI Output and Logging

  • Use structlog_config for logging. Read the usage guide: @https://github.com/iloveitaly/structlog-config/
  • Use logging for operational/debugging info that goes to structured logs.
  • Use CLI output for user-facing messages the user needs to see during normal execution (status updates, warnings, errors). Color these messages.
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 · 34 lines · 0 tokens per session scan A cc89667b0cc2

Subscribe to this mod's changes

standalone-python-scripts is a command published in the GitHub repository iloveitaly/llm-ide-rules (13 stars, last pushed 2d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 285 tokens. 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.

Related

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