Lunima

Lunima is a design tool for photonic integrated circuits, built to be used visually and with an AI agent, on the user's own PDK and with open formats at every step. Layout, Optics, Logic, and System workspaces look at the same design, each with its own Run button for checking, simulating, building logic, or linking chiplets.

Simulation is live: once switched on, every edit re-runs it in the background, so connecting a wire lights it up and sweeping a phase shifter moves light between outputs. The router wires connections one by one, crossings drop in when a wire is cut, and chiplets butt-couple through edge couplers with live link loss and an Align chiplet fix. A Make gate step groups photonic parts, simulates every input combination, and proposes the threshold that turns optical power into a truth table.

Lunima speaks MCP through an agent bridge: an agent such as Claude can inspect and edit the open design, try fixes in a sandbox, and move parts clear. The same engine also runs headless as an MCP server or as a JSON command line, with about 70 tools. Designs live in a Photonic Intermediate Representation file format, and the README states the project status and roadmap in its own sections.