lsp-extract-function

You can extract a code block into a named function by providing the file path, start line, end line, and new function name. The Skill uses the language server's extract-function code action or a manual fallback to refactor the block while preserving variable scope.

Extract-function handles captured variables and scope by validating them during the refactor. Whether using the language server code action or the manual fallback, it ensures variable shadowing and return value propagation are managed correctly.

Yes, you need a running agent-lsp MCP server to extract functions via the primary code action path. It requires access to document operations like open_document, get_code_actions, and apply_edit to apply refactoring edits safely.

When code actions are unavailable during refactoring, the Skill uses a manual fallback to extract the code block. This fallback validates captured variables, shadowing, and return values to ensure the extracted function maintains correctness.

Yes, you can use extract-function for automated code editing workflows. It supports validating and applying edits via MCP LSP tools, enabling safe refactoring of selected blocks into named functions during automated code editing sessions.