Requires the agent-lsp MCP server.

lsp-simulate

Simulate code edits in memory before writing to disk. The LSP server applies your changes to an in-memory overlay, runs diagnostics, and reports whether the edit is safe — without touching any files.

Prerequisites

LSP must be running for the target workspace. If not yet initialized, call start_lsp before any simulation tool.

mcp__lsp__start_lsp(root_dir: "/your/workspace")

Auto-init note: agent-lsp supports workspace auto-inference from file paths. Explicit start_lsp is only needed when switching workspace roots.