Implement complete LSP support for code intelligence tools:
- lsp_transport.rs: JSON-RPC 2.0 transport over stdio with Content-Length
framing, async request/response handling, and graceful shutdown
- lsp_process.rs: LSP process manager with initialize handshake, and methods
for hover, goto_definition, references, document_symbols, completion, format
- lsp_discovery.rs: Auto-discovery of installed LSP servers (rust-analyzer,
clangd, gopls, pyright, typescript-language-server, etc.) with PATH lookup
- lsp_client.rs: Rewired LspRegistry to use real LSP processes instead of
placeholder JSON, with lazy-start on first dispatch call
- config.rs: Added LspServerConfig for user-configured LSP servers
- config_validate.rs: Validation for lsp config section
- main.rs: CLI integration with server discovery at startup, /lsp slash
command for status/start/stop/restart, and graceful shutdown on exit
- commands/src/lib.rs: Added SlashCommand::Lsp variant
The LSP tool is now available to the agent for hover, definition, references,
symbols, completion, and diagnostics queries. Servers are auto-discovered at
REPL startup and lazily started on first use.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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