lsp-generate

name	lsp-generate
description	Trigger language server code generation — implement interface stubs, generate test skeletons, add missing methods, generate mock types. Uses suggest_fixes to surface generator options and execute_command to run them.
argument-hint	[file-path:line:col] [generation-intent]
user-invocable	true
allowed-tools	mcp__lsp__suggest_fixes mcp__lsp__execute_command mcp__lsp__apply_edit mcp__lsp__format_document mcp__lsp__get_diagnostics mcp__lsp__open_document mcp__lsp__get_server_capabilities mcp__lsp__go_to_symbol
license	MIT
compatibility	Requires the agent-lsp MCP server (github.com/blackwell-systems/agent-lsp)
metadata	{"required-capabilities":"codeActionProvider","optional-capabilities":"workspaceSymbolProvider documentFormattingProvider"}

Requires the agent-lsp MCP server.

lsp-generate

lsp-generate creates NEW code that does not yet exist in the file — stubs, mocks, implementations of interfaces, test functions. It is distinct from lsp-extract-function, which restructures code that already exists. Use lsp-generate when you want the language server to write something new; use lsp-extract-function when you want to reorganize existing code.

Input

• file_path: absolute path to the target file
• line, column (or position_pattern): position in the file where generation is triggered (e.g., the line with the unimplemented interface, the missing method error, the type declaration)
• intent: description of what to generate (e.g., "implement io.Reader", "generate test skeleton", "add missing methods", "generate mock for Handler")

Prerequisites

LSP must be running for the target workspace. If not yet initialized, call mcp__lsp__start_lsp with the workspace root before proceeding.

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

---

Workflow

Step 1 — Open document and locate position

Call mcp__lsp__open_document for the target file:

mcp__lsp__open_document(file_path: "/abs/path/to/file.go", language_id: "go")

If using position_pattern, use the @@ marker convention from references/patterns.md to identify the exact cursor position. For example:

"position_pattern": "var _ io.Reade@@r = (*MyType)(nil)"

Step 2 — Get code actions at target position

mcp__lsp__suggest_fixes({
  "file_path": "...",
  "start_line": N,
  "start_column": C,
  "end_line": N,
  "end_column": C
})

Filter for generator actions:

• Kind "quickfix" with titles matching the intent (e.g., "Implement interface", "Generate", "Add stub", "Create test")
• Kind "source" for source-level generation

If no matching action is found, report "No generator action available at this position for the given intent" and proceed to the Fallback section below.