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 skills/eliecer2000/kiro-bootstrap/python-runtimenpx skills add eliecer2000/kiro-bootstrap --skill python-runtimegit clone --depth 1 https://github.com/eliecer2000/kiro-bootstrapWhat 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 | $0.00034 | $0.01719 |
| Opus 5 | $0.00017 | $0.00860 |
| Sonnet 5 | $0.00007 | $0.00344 |
| Haiku 4.5 | $0.00003 | $0.00172 |
Grade A, and why
python-runtime 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 — 250 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Python Runtime
Skill para configurar y mantener toolchains Python modernos: Ruff (linting + formatting), pytest, type hints con mypy, gestión de dependencias, virtual environments y estándares de proyecto.
Principios fundamentales
- Python 3.12+ como runtime mínimo.
- Ruff como linter y formatter unificado (reemplaza flake8, isort, black, pyflakes).
- pytest como test runner con plugins (pytest-cov, pytest-asyncio, hypothesis).
- Type hints obligatorios en funciones públicas. mypy o pyright para validación estática.
- Virtual environments siempre. Nunca instalar dependencias globalmente.
Estructura de proyecto recomendada
proyecto/
├── src/
│ └── mi_paquete/
│ ├── __init__.py
│ ├── handlers/
│ ├── services/
│ ├── repositories/
│ ├── models/
│ └── utils/
├── tests/
│ ├── unit/
│ ├── integration/
│ └── conftest.py
├── pyproject.toml
├── requirements.txt
├── requirements-dev.txt
└── README.md
pyproject.toml recomendado
[project]
name = "mi-proyecto"
version = "0.1.0"
requires-python = ">=3.12"
dependencies = [
"aws-lambda-powertools[all]>=2.0.0",
"pydantic>=2.0.0",
"boto3>=1.34.0",
]
[project.optional-dependencies]
dev = [
"ruff>=0.4.0",
"mypy>=1.10.0",
"pytest>=8.0.0",
"pytest-cov>=5.0.0",
"pytest-asyncio>=0.23.0",
"hypothesis>=6.100.0",
"boto3-stubs[dynamodb,s3,sqs]",
"moto[dynamodb,s3,sqs]>=5.0.0",
]
[tool.ruff]
target-version = "py312"
line-length = 120
[tool.ruff.lint]
select = [
"E", # pycodestyle errors
"W", # pycodestyle warnings
"F", # pyflakes
"I", # isort
"N", # pep8-naming
"UP", # pyupgrade
"B", # flake8-bugbear
"SIM", # flake8-simplify
"TCH", # flake8-type-checking
"RUF", # ruff-specific rules
]
ignore = ["E501"] # line length handled by formatter
[tool.ruff.lint.isort]
known-first-party = ["mi_paquete"]
[tool.mypy]
python_version = "3.12"
strict = true
warn_return_any = true
warn_unused_configs = true
disallow_untyped_defs = true
[tool.pytest.ini_options]
testpaths = ["tests"]
addopts = "-v --tb=short --strict-markers"
markers = [
"unit: Unit tests",
"integration: Integration tests",
"slow: Slow tests",
]
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 · 250 lines · 34 tokens per session scan A d3486e09c4bd
python-runtime is a skill published in the GitHub repository eliecer2000/kiro-bootstrap (9 stars, last pushed 5mo ago), licensed MIT. It adds 34 tokens to every session and 1,719 once invoked, about $0.0002 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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