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Opus Compatibility Scanner — Development skill for Claude Code

Development community

Free Claude Code skill that audits CLAUDE.md, AGENTS.md, subagents, settings.json, hooks, and Anthropic SDK call sites for Claude Opus 4.6 ⇄ 4.7 compatibility issues.

How to install Opus Compatibility Scanner

This entry records only its repository, not the path inside it, so there is no exact command to give. Open readysolutionsai/opus-compatibility-scanner and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Opus Compatibility Scanner does

Free Claude Code skill that audits CLAUDE.md, AGENTS.md, subagents, settings.json, hooks, and Anthropic SDK call sites for Claude Opus 4.6 ⇄ 4.7 compatibility issues. 70 patterns. MIT.

Alternatives in Development

Claude API — Build apps with the Claude API or Anthropic SDK 94.1k ★
Anthropic SDK Python — PyPI version 3.9k ★
Claudes C Compiler — Claude Opus 4.6 wrote a dependency-free C compiler in Rust, with backends targeting x86 (64- and 32-bit), ARM 2.6k ★

README

Claude Opus 4.6 ⇄ 4.7 Compatibility Scanner

[![Version](https://img.shields.io/github/v/release/readysolutionsai/opus-compatibility-scanner?label=version&color=CC785C)](https://github.com/readysolutionsai/opus-compatibility-scanner/releases) [![License](https://img.shields.io/badge/license-MIT-1A1917)](LICENSE) [![Patterns](https://img.shields.io/badge/patterns-70-CC785C)](references/) [![Pattern catalog](https://img.shields.io/badge/catalog_current_through-2026--04--26-6B665F)](references/) [![Build story](https://img.shields.io/badge/read-the_build_story-1A1917?labelColor=CC785C)](https://readysolutions.ai/blog/2026-04-26-opus-4-7-compatibility-scanner-claude-code/)

A long-lived hygiene tool for projects that actively use both Claude Opus 4.6 and Opus 4.7. Default mode never proposes a change that would degrade either model.

What it does

Scans `CLAUDE.md`, `AGENTS.md`, subagent definitions, skill files, `settings.json`, hook scripts, package manifests, and Anthropic SDK call sites for known 4.6 → 4.7 migration issues. Surfaces every finding as Critical, Warning, or Info, then walks fixes one at a time with citations back to the relevant Anthropic documentation.

Why it matters

Claude Opus 4.7 reads instructions more literally than 4.6 did. Directives that 4.6 silently inferred a sensible interpretation for (`be concise`, `default to no comments`, `never use any`) get applied at face value on 4.7, and your agent starts behaving differently. Configuration that worked on 4.6 (`thinking: { type: "enabled", budget_tokens: N }`, non-default `temperature`) returns HTTP 400 on 4.7. This scanner finds both classes of issues before you upgrade.

Quick start

Three ways to install. Pick what fits your workflow.

**Option 1: Download the latest release (recommended)**

Grab `opus-compatibility-scanner.skill` (or `.zip`) from the [latest release](https://github.com/readysolutionsai/opus-compatibility-scanner/releases/latest), then extract: