Code Ratchets
A ratchet is a pre-commit check that counts deprecated patterns in your codebase against a hard-coded expected count. It fails in two cases: - **Too many instances**: Prevents proliferation via copy-paste - **Too few instances**: Congratulates you and prompts lowering the expected count
breaking-change-analysis
Assesses the impact of API changes before implementation to understand what code would break and plan appropriate migration paths. Use when removing methods, changing interfaces, or planning deprecations.
/add-breadcrumb-page â Scaffold Breadcrumb Aggregate Page
Create a complete breadcrumb aggregate page following the pattern established by deprecations, N+1 queries, and cache health pages.
diffusion-perf
Deprecated alias (merged into diffusion-kernel).
sourcesage-cli
Generate AI-friendly repository documentation with the SourceSage CLI. Use when Codex needs to run `sage` or `sourcesage` to create `.SourceSageAssets/Repository_summary.md`, analyze the current repository or another local repository, switch the output language between English and Japanese, use `--lite` to keep the summary small, change the output directory, or optionally create a deprecated tag-diff release report with `--diff`.
update-swiftui-apis
Scan Apple's SwiftUI documentation for deprecated APIs and update the SwiftUI Expert Skill with modern replacements. Use when asked to "update latest APIs", "refresh deprecated SwiftUI APIs", "check for new SwiftUI deprecations", "scan for API changes", or after a new iOS/Xcode release. Requires the Sosumi MCP to be available.
fastexcel-to-fesod
Migrates a Java project from FastExcel 1.3 (cn.idev.excel:fastexcel:1.3.0) to Apache Fesod (org.apache.fesod:fesod-sheet:2.0.1-incubating). Invoke this skill when asked to "migrate FastExcel to Fesod", "upgrade to Apache Fesod", or "replace cn.idev.excel". FastExcel 1.3 is the direct predecessor of Apache Fesod. Supports both legacy namespaces seen in real projects: cn.idev.excel.* and org.apache.fesod.excel.*. The entry classes FastExcel and FastExcelFactory are kept as @Deprecated aliases in Fesod, so call-site renames are strongly recommended but NOT required for compilation. The only breaking change is the Java package prefix.
Subotiz Dev MCP(Deprecated)
Connect AI assistants to Subotiz - Using Subotiz's external capabilities through natural language
automem
Deprecated compatibility template. Prefer the OpenClaw plugin; use skill-mcp or skill-legacy only when you specifically need those modes.
rails-upgrade-assistant
Analyzes Rails applications and generates comprehensive upgrade reports with breaking changes, deprecations, and step-by-step migration guides for Rails 7.0 through 8.1.1. Use when upgrading Rails applications, planning multi-hop upgrades, or querying version-specific changes.
rails-upgrade
Analyzes Rails applications and generates comprehensive upgrade reports with breaking changes, deprecations, and step-by-step migration guides for Rails 2.3 through 8.1. Use when upgrading Rails applications, planning multi-hop upgrades, or querying version-specific changes. Based on FastRuby.io methodology and "The Complete Guide to Upgrade Rails" ebook.
memory-review
Interactive review of all memory/ files â keep, update, deprecate, or delete entries one by one. Use when the user wants to audit and prune accumulated memory â 'review my memory', 'clean up what you remember'. Do NOT use for: teaching a new fact (use learn), recalling something specific (read memory directly), or batch-promoting session insights (use recap).
assessing-breaking-changes
Guides assessment of backward compatibility for MSBuild changes. Consult when modifying behavior, adding warnings or errors, changing defaults, altering target ordering, removing or deprecating features, deciding whether a change needs a ChangeWave, reviewing blast radius of behavioral changes, or when a PR introduces user-visible output differences.
kata-add-issue
Capture an idea, task, or issue that surfaces during a Kata session as a structured issue for later work. This skill creates markdown issue files in the .planning/issues/open directory with relevant metadata and content extracted from the conversation. Triggers include "add issue", "capture issue", "new issue", "create issue", "log issue", "file issue", "add todo" (deprecated), "capture todo" (deprecated), "new todo" (deprecated).
2D Essentials in Godot 4.3+
All examples target Godot 4.3+ with no deprecated APIs. GDScript is shown first, then C#.