lsp-navigation

name	lsp-navigation
description	Navigate code with IDE features and run proactive LSP diagnostics on files/folders/batches. Use as PRIMARY for code intelligence and type/error checks.

LSP Navigation and Diagnostics

Use lsp_navigation as PRIMARY for code intelligence. Use lsp_diagnostics as PRIMARY for proactive type/error checks. Do NOT use grep/glob/ast-grep first for code intelligence.

Diagnostics

Use lsp_diagnostics before builds/tests or after touching several files:

Need	Tool call
Check one file	lsp_diagnostics({ filePath: "src/file.ts" })
Check a folder	lsp_diagnostics({ filePath: "src/", severity: "error" })
Check exact touched files	lsp_diagnostics({ filePaths: ["src/a.ts", "src/b.ts"], concurrency: 8 })
Slow server (Rust, Java)	lsp_diagnostics({ filePaths: files, waitMs: 2000 })
Include warnings	lsp_diagnostics({ filePaths: files, severity: "all" })

Prefer explicit filePaths batches after multi-file edits — bounded concurrency, no unrelated directory noise.

Navigation (Code Intelligence)

Question	Operation	Parameters
Where is this defined?	definition	filePath, line, character
Find all usages	references	filePath, line, character
What type is this?	hover	filePath, line, character
Call signature	signatureHelp	filePath, line, character (at arg position)
Symbols in this file	documentSymbol	filePath
Find symbol across project	workspaceSymbol	query + filePath (strongly recommended)
Quick fixes available	codeAction	filePath, line, character, endLine, endCharacter
Rename symbol safely	rename	filePath, line, character, newName
Who implements this?	implementation	filePath, line, character
Who calls this function?	prepareCallHierarchy → incomingCalls	filePath, line, character
What does this call?	prepareCallHierarchy → outgoingCalls	filePath, line, character

Call Hierarchy Pattern

// Step 1
lsp_navigation(operation="prepareCallHierarchy", filePath="src/api.ts", line=42, character=10)
// → returns callHierarchyItem

// Step 2
lsp_navigation(operation="incomingCalls", callHierarchyItem=<item from step 1>)
lsp_navigation(operation="outgoingCalls", callHierarchyItem=<item from step 1>)

Operational Notes

• definition returns nothing? The file may not be open/indexed yet. Read it first, then retry.
• workspaceSymbol empty? Always pass filePath. Unscoped queries are best-effort and frequently return nothing. If TypeScript returns "No Project", open the scoped file first.
• references — query from the definition site for full cross-file coverage; usage-site queries can be partial.
• signatureHelp — only valid at call-site argument positions; declaration positions return empty.
• workspaceDiagnostics — tracked push snapshot only, not an active check. Use lsp_diagnostics when you need fresh results.
• codeAction — distinguish quickfix from generic refactors ("Move to new file"). Generic refactors are not error fixes.
• prepareCallHierarchy — server-capability dependent; if unsupported, skip incoming/outgoing calls.

When NOT to Use LSP Navigation

Task	Use Instead
Find patterns (console.log)	ast_grep_search
Find text / TODOs	grep
Find files by name	glob
Read file content	read

Golden Rule

Code intelligence → lsp_navigation first. Type/error validation → lsp_diagnostics first. Text/pattern search → grep/ast-grep.