Translates a single function or small code unit between programming languages, mapping idioms and preserving observable behavior. Use when porting one function, when the user pastes code and asks for it in another language, or as the per-unit primitive for larger migrations.

Master guide for using Agent Code effectively. Includes configuration templates, prompting strategies "Thinking" keywords, debugging techniques, and best practices for interacting with the agent.

Expert 10x engineer skill for interpreting and implementing code from shorthand, quasi-code, and natural language descriptions. Use when collaborators provide incomplete code snippets, pseudo-code, or descriptions with potential typos or incorrect terminology. Excels at translating non-technical or semi-technical descriptions into production-quality code.

Generates code comments that explain non-obvious intent, constraints, and tradeoffs — not what the code already says. Use when code is correct but opaque, when documenting for future maintainers, or when a function's why is harder to see than its what.

Run Dart build_runner for code generation of Mappable classes and JSON serialization. Use after adding or modifying data model classes that require generated code.

Optimizes code for performance by identifying the actual bottleneck, choosing the right optimization lever, and measuring the result. Use when a specific operation is too slow, when a profiler has pointed at a hot path, or when the user asks to make something faster.

Identifies recurring structural patterns in a codebase — idioms, copy-paste clones, homegrown abstractions — and characterizes each as a reusable template. Use when learning a codebase's conventions, when hunting for copy-paste that should be a function, or when documenting how this team does things.

Embed an Arcade expression editor in applications using the Coding Components package. Use for building Arcade authoring, testing, and debugging interfaces.

TLA+-specific instance of model-guided repair — reads a TLC error trace, identifies the enabling condition that should have been false, strengthens the corresponding action, and maps the fix to source code. Use when TLC reports an invariant violation or deadlock and you have the code-to-TLA+ mapping from extraction.

Run Codex CLI, Claude Code, OpenCode, or Pi Coding Agent via background process for programmatic control.

Agent skill for implementer-sparc-coder - invoke with $agent-implementer-sparc-coder

libcodegen - Protocol Buffer code generation. TypeGenerator, ServiceGenerator, and DefinitionGenerator transform .proto files into JavaScript types, gRPC service stubs, and type definitions. Use for generating code from protobuf schemas, automating service stub creation, and maintaining type consistency across services.