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live_session_server

live_session_server

by bhaveshbakshi633
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

textToCadForAll

Let anyone turn a plain-language description into a real, manufacturable CAD design using the AI of their choice: Claude, GPT, or any other model that can call tools.

Why

Today AI can talk about designs but rarely produces parts a workshop can actually make. This project builds the missing layer between an AI model and a real CAD system (SolidWorks first), so the model can create, inspect, and fix geometry in real time while a human watches and steers.

Related MCP server: solidworks-mcp

Principles

  • Real designs only. Every part must be manufacturable and every assembly must be assemblable: standard stock, off-the-shelf parts, fasteners with tool access, valid sheet-metal flat patterns.

  • Model-agnostic. All capabilities are exposed as MCP tools so any AI client can use them.

  • API over simulated input. Drive CAD through its native API (COM for SolidWorks). Use mouse/keyboard UI automation only as a narrow fallback where no API exists.

  • Honest capability tiers. Every tool is labelled verified, pilot, or blocked. Pilot output needs human review; blocked means it does not work yet.

  • See the result. After each change the AI renders and checks the model visually and numerically.

Roadmap

  1. Live-session MCP server: read the user's current selection, view, feature tree, rebuild errors, and screenshots so the AI is aware of what the human is doing.

  2. Action tools: sketches, features, mates, dimensions, with undo after every step.

  3. UI-automation fallback for dialogs and options with no API.

  4. Design checks: interference, clearances, fastener access, sheet-metal rules, DFM.

  5. Support for other CAD systems and other AI clients.

Live-session server (SolidWorks)

live_session_server.py is a stdio MCP server that gives any AI client real-time awareness of a running SOLIDWORKS session. It only reads through the native COM API and never sends simulated mouse or keyboard input.

Tool

Tier

What it does

live_status

verified

Version, active document, unsaved/rebuild flags, selection count, in-context edit state

get_selection

verified

What the human selected: kind, owning component, click point, plane normal / cylinder axis and radius / circle centre / line endpoints, all in mm

get_view

verified

Rotation matrix, translation and zoom of the active view

get_feature_tree

verified

Features with type, suppression and error code; assembly components with fixed/suppressed state

get_rebuild_errors

verified

Only the features carrying errors, plus suppressed components

screenshot

verified

PNG of the graphics area, optionally from a named view with zoom-to-fit; the human's view is restored afterwards

rebuild

pilot

Rebuild and report errors

undo

pilot

Undo N steps (same as Ctrl+Z) to back out a rejected AI action

select_by_name

pilot

Select a named plane/face/feature/component for a following action

clear_selection

verified

Clear the selection

Verified on SOLIDWORKS 2026 SP3, Python 3.14, pywin32 312, mcp 2.2.

Install

pip install -r requirements.txt
claude mcp add --scope user sw-live -- python C:\path\to\live_session_server.py

Any MCP client works the same way (Cursor, Codex, Claude Desktop, ...): run python live_session_server.py over stdio. SOLIDWORKS must already be running at the same privilege level as the server.

Status

Live-session watch tools work. Action tools (sketches, features, mates) come next. Contributions and ideas are welcome.

License

MIT

Tool Schema Changelog

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