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python-env

Fast Python environment management with uv (10-100x faster than pip). Triggers on: uv, venv, pip, pyproject, python environment, install package, dependencies.

Install with Tessl CLI

npx tessl i github:NeverSight/skills_feed --skill python-env
What are skills?

95

Does it follow best practices?

Validation for skill structure

SKILL.md
Review
Evals

Evaluation results

100%

50%

Bootstrap a Python Data Processing Library

Project setup workflow

Criteria
Without context
With context

uv venv used

0%

100%

uv pip install used

0%

100%

Editable install with dev extras

50%

100%

pyproject.toml [project] table

100%

100%

requires-python constraint

100%

100%

Runtime dependencies declared

100%

100%

Dev dependencies in optional-dependencies

100%

100%

uv pip list captured

0%

100%

Python version specified

0%

100%

No bare pip usage

0%

100%

No requirements.txt only approach

100%

100%

Without context: $0.3323 · 1m 26s · 21 turns · 28 in / 4,092 out tokens

With context: $0.4238 · 1m 20s · 26 turns · 29 in / 4,225 out tokens

83%

Fetch and Summarise Weather Data

Package install and script execution

Criteria
Without context
With context

uv venv for env creation

100%

100%

uv pip install for packages

100%

100%

Install from requirements file

100%

100%

uv run for script execution

0%

0%

No bare pip usage

100%

100%

httpx imported in script

100%

100%

rich imported in script

100%

100%

requirements.txt present

100%

100%

No source activation required

70%

70%

Without context: $0.2113 · 53s · 16 turns · 19 in / 3,026 out tokens

With context: $0.4818 · 1m 25s · 28 turns · 33 in / 5,489 out tokens

54%

3%

Resolve Dependency Conflicts in a Legacy API Service

Dependency conflict resolution

Criteria
Without context
With context

uv venv used

100%

100%

uv pip install used

100%

100%

Backtracking resolver invoked

0%

0%

All three packages present

100%

100%

uv pip list output captured

0%

40%

No bare pip usage

100%

100%

Conflict approach documented

60%

50%

uv cache clean mentioned

0%

0%

No requirements.txt only approach

50%

50%

Without context: $0.2576 · 1m 12s · 19 turns · 25 in / 3,856 out tokens

With context: $0.5510 · 1m 43s · 33 turns · 38 in / 5,901 out tokens

Evaluated
Agent
Claude Code

Table of Contents

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