Lisa ↔ Coding-Agent Parity (RESEARCH)

Lisa is distributed for multiple coding agents: Claude Code is the production path, with Codex, Cursor (cursor-agent), Antigravity (agy), and GitHub Copilot (copilot) as additional install targets. When any agent ships a new capability, or when a Lisa feature exists for one agent ahead of the others, the picture of "what's portable, what isn't, where Lisa polyfills, what's deliberately agent-only" drifts. This skill is the repeatable research protocol for refreshing that picture.

This skill is research-only. Its output is a four-part artifact — a universal feature catalog, a support matrix, a plugin-distributability matrix, and per-cell Lisa polyfill designs. It does not write installer code, build per-agent plugin variants, or modify Lisa's source tree. Implementation work is the sibling skill [[lisa-coding-agent-parity-implement]], which consumes this artifact as its primary input.