Agent skill

Python API Consistency Validator

Validate API consistency between two versions of Python libraries.

Apache-2.0Auto-check passedSecurity

Install Python API Consistency Validator

skills CLI

$ npx skills add ArabelaTso/Skills-4-SE --skill python-api-consistency-validator -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install ArabelaTso/Skills-4-SE python-api-consistency-validator --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/ArabelaTso/Skills-4-SE.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/python-api-consistency-validator .claude/skills/python-api-consistency-validator && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "python-api-consistency-validator" agent skill from https://github.com/ArabelaTso/Skills-4-SE/tree/main/skills/python-api-consistency-validator into .claude/skills/python-api-consistency-validator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "python-api-consistency-validator", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/ArabelaTso/Skills-4-SE/tree/main/skills/python-api-consistency-validator

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add ArabelaTso/Skills-4-SE --skill python-api-consistency-validator -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install ArabelaTso/Skills-4-SE python-api-consistency-validator --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ArabelaTso/Skills-4-SE.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/python-api-consistency-validator .agents/skills/python-api-consistency-validator && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "python-api-consistency-validator" agent skill from https://github.com/ArabelaTso/Skills-4-SE/tree/main/skills/python-api-consistency-validator into .agents/skills/python-api-consistency-validator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "python-api-consistency-validator", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add ArabelaTso/Skills-4-SE --skill python-api-consistency-validator -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install ArabelaTso/Skills-4-SE python-api-consistency-validator --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ArabelaTso/Skills-4-SE.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/python-api-consistency-validator .cursor/skills/python-api-consistency-validator && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "python-api-consistency-validator" agent skill from https://github.com/ArabelaTso/Skills-4-SE/tree/main/skills/python-api-consistency-validator into .cursor/skills/python-api-consistency-validator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "python-api-consistency-validator", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/ArabelaTso/Skills-4-SE.git --path skills/python-api-consistency-validator

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add ArabelaTso/Skills-4-SE --skill python-api-consistency-validator -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install ArabelaTso/Skills-4-SE python-api-consistency-validator --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ArabelaTso/Skills-4-SE.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/python-api-consistency-validator .gemini/skills/python-api-consistency-validator && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "python-api-consistency-validator" agent skill from https://github.com/ArabelaTso/Skills-4-SE/tree/main/skills/python-api-consistency-validator into .gemini/skills/python-api-consistency-validator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "python-api-consistency-validator", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install ArabelaTso/Skills-4-SE python-api-consistency-validator

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add ArabelaTso/Skills-4-SE --skill python-api-consistency-validator -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/ArabelaTso/Skills-4-SE.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/python-api-consistency-validator .github/skills/python-api-consistency-validator && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "python-api-consistency-validator" agent skill from https://github.com/ArabelaTso/Skills-4-SE/tree/main/skills/python-api-consistency-validator into .github/skills/python-api-consistency-validator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "python-api-consistency-validator", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add ArabelaTso/Skills-4-SE --skill python-api-consistency-validator -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install ArabelaTso/Skills-4-SE python-api-consistency-validator --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ArabelaTso/Skills-4-SE.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/python-api-consistency-validator .opencode/skills/python-api-consistency-validator && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "python-api-consistency-validator" agent skill from https://github.com/ArabelaTso/Skills-4-SE/tree/main/skills/python-api-consistency-validator into .opencode/skills/python-api-consistency-validator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "python-api-consistency-validator", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: python-api-consistency-validator
GitHub stars: 253
Token cost: ~609 tokens
SKILL.md length: 154 words
Files: 2 (incl. scripts)
Skills in repo: 150
Repo updated: Aug 21, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Validate API consistency between two versions of Python libraries.

Works in 5 steps: Function Signatures - Parameters, return… → Class Definitions - Methods,… → Parameter Changes - Added, removed, or… → …
You need to compare API behavior
SKILL.md covers Overview, Quick Start, What Gets Validated and Validation Report, plus 2 more sections
Runs Python scripts from its folder; calls python

What it does

Python API Consistency Validator is an agent skill from ArabelaTso/Skills-4-SE. Validate API consistency between two versions of Python libraries. Use when you need to compare API behavior, signatures, and exceptions between library versions to identify breaking changes, incompatible modifications, and behavior differences. The skill performs static analysis of Python code, compares function signatures, class definitions, parameter types, return types, and generates a detailed JSON report with breaking changes, warnings, and migration guidance. Supports Python libraries and packages.

Its SKILL.md is about 610 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including scripts (for example `scripts/validate.py`).

It sits in Security, covering Static analysis and SAST. It works with Python. The repository describes itself as: A curated list of 180+ useful Claude Skills for Software Engineering and resources for customizing AI for SE workflows. The licence is Apache-2.0.

When your agent uses it

You need to compare API behavior
Exceptions between library versions to identify breaking changes
Incompatible modifications
Behavior differences

Example prompts

“/python-api-consistency-validator”

Requirements

Python 3

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

Function Signatures - Parameters, return types, decorators
Class Definitions - Methods, inheritance, attributes
Parameter Changes - Added, removed, or modified parameters
Return Type Changes - Modified return types
Removed APIs - Deleted functions, classes, or methods

What it can do on your machine

Read from SKILL.md and the folder at commit 4f38503. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 1 file in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
- python
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Python API Consistency Validator loads about 609 tokens when it runs. Until then it costs about 136 tokens; SKILL.md has 154 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~136
When it runs · the whole SKILL.md, loaded when a task matches: ~609

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from ArabelaTso/Skills-4-SE at commit 4f38503, republished under its Apache-2.0 licence (© ArabelaTso). 154 words, ~609 tokens.

Download SKILL.mdSave it as .claude/skills/python-api-consistency-validator/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: python-api-consistency-validator
description: Validate API consistency between two versions of Python libraries. Use when you need to compare API behavior, signatures, and exceptions between library versions to identify breaking changes, incompatible modifications, and behavior differences. The skill performs static analysis of Python code, compares function signatures, class definitions, parameter types, return types, and generates a detailed JSON report with breaking changes, warnings, and migration guidance. Supports Python libraries and packages.

Python API Consistency Validator

Overview

This skill validates API consistency between two versions of Python libraries by comparing signatures, behavior, and exceptions. It identifies breaking changes, incompatible modifications, and provides detailed reports to guide safe API migration or upgrade.

Quick Start

bash

# Compare two versions of a Python library
python scripts/validate.py /path/to/old_version /path/to/new_version

# Specify output file
python scripts/validate.py old_lib/ new_lib/ --output report.json

What Gets Validated

Function Signatures - Parameters, return types, decorators
Class Definitions - Methods, inheritance, attributes
Parameter Changes - Added, removed, or modified parameters
Return Type Changes - Modified return types
Removed APIs - Deleted functions, classes, or methods

Validation Report

The tool generates a JSON report with:

Breaking Changes: API removals, incompatible modifications
Warnings: Type changes, signature modifications
Info: New additions, non-breaking changes
Summary: Total issues by severity

Example report:

json

{
  "summary": {
    "breaking_changes": 3,
    "warnings": 5,
    "info": 2
  },
  "breaking_changes": [
    {
      "type": "function_removed",
      "name": "deprecated_func",
      "severity": "breaking",
      "message": "Function 'deprecated_func' was removed"
    }
  ]
}

Usage

bash

python scripts/validate.py <old_version_path> <new_version_path> [--output <report.json>]

The validator exits with code 1 if breaking changes are found, 0 otherwise.

Tips

Run validation before upgrading dependencies
Review breaking changes carefully
Check warnings for potential issues
Use in CI/CD pipelines to catch API changes
Compare against semantic versioning expectations

Files

SKILL.md and 1 other file (scripts) in skills/python-api-consistency-validator of ArabelaTso/Skills-4-SE.

SKILL.md
scripts/validate.py

Open the folder on GitHubat commit 4f38503

Compare with similar skills

Python API Consistency Validator next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Python API Consistency Validator compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Python API Consistency Validator this skillArabelaTso/Skills-4-SE	253	—	~609	Automated safety check: Pass	Apache-2.0	1 mo ago
C To AstNarwhal-Lab/MagicSkills	316	—	~1.1k	Automated safety check: Pass	MIT	6 mo ago
Security Setupluongnv89/skills	131	—	~4.5k	Automated safety check: Pass	MIT	today
CodeQL Security Scantrailofbits/skills	7.4k	—	~4.6k	Automated safety check: Notes	CC-BY-SA-4.0	today
Kedro Security Reviewkedro-org/kedro	11k	—	~3.3k	Automated safety check: Pass	Custom licence	today
Skylosduriantaco/skylos	843	—	~581	Automated safety check: Pass	Apache-2.0	today

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Questions about Python API Consistency Validator

What does Python API Consistency Validator do?

Validate API consistency between two versions of Python libraries. Python API Consistency Validator is an agent skill from ArabelaTso/Skills-4-SE. Validate API consistency between two versions of Python libraries.

When should I use Python API Consistency Validator?

Python API Consistency Validator fits situations like: you need to compare API behavior; exceptions between library versions to identify breaking changes; incompatible modifications; behavior differences.

How do I install Python API Consistency Validator in Claude Code?

Run `npx skills add ArabelaTso/Skills-4-SE --skill python-api-consistency-validator -a claude-code`. Or copy the skill folder (skills/python-api-consistency-validator in ArabelaTso/Skills-4-SE) into .claude/skills/python-api-consistency-validator in your project. Claude Code loads it when a task matches its description.

How do I install Python API Consistency Validator in Codex?

Run `npx skills add ArabelaTso/Skills-4-SE --skill python-api-consistency-validator -a codex`. Or copy the skill folder (skills/python-api-consistency-validator in ArabelaTso/Skills-4-SE) into .agents/skills/python-api-consistency-validator in your project. Codex loads it when a task matches its description.

Can I use Python API Consistency Validator in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ArabelaTso/Skills-4-SE --skill python-api-consistency-validator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/python-api-consistency-validator, .gemini/skills/python-api-consistency-validator, .github/skills/python-api-consistency-validator and .opencode/skills/python-api-consistency-validator in your project.

What does Python API Consistency Validator need to run?

Going by SKILL.md and its folder, Python API Consistency Validator needs Python for the scripts in its folder and the command-line tools its instructions call (python). Our summary lists: Python 3.

Does Python API Consistency Validator access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Python API Consistency Validator safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Python API Consistency Validator use?

Python API Consistency Validator is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Python API Consistency Validator use?

About 609 tokens (SKILL.md is roughly 2.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Python API Consistency Validator?

Skills that share tags, products or a category with Python API Consistency Validator: C To Ast (Narwhal-Lab/MagicSkills, 316 stars), Security Setup (luongnv89/skills, 131 stars), CodeQL Security Scan (trailofbits/skills, 7.4k stars) and Kedro Security Review (kedro-org/kedro, 11k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Python API Consistency Validator?

ArabelaTso (a GitHub user) maintains it in ArabelaTso/Skills-4-SE, which has 253 GitHub stars. The repository holds 150 skills in this directory. The repository was last updated on August 21, 2026.

Source: ArabelaTso/Skills-4-SE on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Python API Consistency Validator

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Python API Consistency Validator

Overview

Quick Start

What Gets Validated

Validation Report

Usage

Tips

Files

Compare with similar skills

Similar skills

More from ArabelaTso/Skills-4-SE

Related

Questions about Python API Consistency Validator