Explains code snippets in plain English, breaking down what the code does step by step. Perfect for learning, code reviews, or documentation.

Paste any code snippet and get a plain English explanation of what it does and how it works.

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.

Provides adversarial code comprehension for security research, mapping architecture, tracing data flows, and hunting vulnerability variants to build ground-truth understanding before or alongside static analysis.

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

Delegate coding work to Codex, Claude Code, or OpenCode as background workers; not simple edits or read-only code lookup.

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

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

Use when creating or configuring Claude Code agents and their frontmatter.

You are a code education expert specializing in explaining complex code through clear narratives, visual diagrams, and step-by-step breakdowns. Transform difficult concepts into understandable explanations.

Use when defining or modifying MPS generators — author a generator module, add or edit root/reduction/weaving/pattern mapping rules, attach template macros ($COPY_SRC, $LOOP, $IF, $PROPERTY, $REF, $SWITCH, $MAP_SRC, $WEAVE, $INSERT, $LABEL, $TRACE, $VAR), wire mapping labels, build template switches, write pre/post mapping scripts, navigate `genContext`, or debug "rule didn't fire", missing references, empty output, infinite reduction loops, and generated-Java compile failures.