copilot-codeact-plugin

CodeAct via Hyperlight. Use when looping over many files (8+), cross-referencing results from multiple sources, aggregating data across directories, or chaining 5+ dependent tool calls. Collapses N round-trips into one sandboxed Python run via scripts/codeact.py. NOT beneficial for <5 files or simple grep-then-view — direct tool calls have less overhead at small scale. ESPECIALLY valuable when MCP servers are loaded — fewer turns means the MCP tool catalog context is replayed fewer times. Run `scripts/codeact.py --discover` to see available sandbox tools. Trigger: "codeact", "chain tools", "sandbox", "batch", "for each", "hyperlight sandbox", "collapse tool calls", "run in sandbox", "sandbox execution".

CodeAct via Monty. Use when looping over many files (8+), cross-referencing results from multiple sources, aggregating data across directories, or chaining 5+ dependent tool calls. Collapses N round-trips into one sandboxed Python run via scripts/codeact.py. NOT beneficial for <5 files or simple grep-then-view — direct tool calls have less overhead at small scale. ESPECIALLY valuable when MCP servers are loaded — fewer turns means the MCP tool catalog context is replayed fewer times. Run `scripts/codeact.py --discover` to see available sandbox tools. Sub-microsecond startup. Trigger: "codeact", "chain tools", "sandbox", "batch", "for each", "monty codeact", "monty sandbox", "run in monty", "pydantic monty".

Switch codeact to the Hyperlight backend (micro-VM sandbox via WebAssembly, stronger isolation). Use when user wants to switch to hyperlight, needs full Python support, or stronger sandbox isolation.

Switch codeact to the Monty backend (Pydantic Monty — minimal Python interpreter in Rust, sub-microsecond startup). Use when user wants to switch to monty, use monty backend, or needs lightweight sandboxing.

Install or reconfigure codeact. Auto-detects best backend (monty or hyperlight), runs preflight checks, discovers available tools, and writes configuration files. Use when user asks to install, configure, set up, or reconfigure codeact. Supports --global flag for system-wide install.