Jump to symbol definition location.

🔴 CRITICAL: Line and character are STRICTLY 0-INDEXED (0, 1, 2...), NOT 1-indexed!

❌ WRONG (what editor displays): Editor shows: "Ln 5, Col 10" ❌ DON'T use: {"line": 5, "character": 10}

✅ CORRECT (0-indexed): ✅ DO use: {"line": 4, "character": 9} Formula: lsp_value = editor_value - 1

CHARACTER COUNTING (0-indexed from start of line): Line: "const greeting = "Hello";" Index: 0123456789... • 'c' in const → character: 0 • 'o' in const → character: 1 • 'g' in greeting → character: 6 • 'H' in string → character: 18

Args: params (LSPInput): Must provide line and character as 0-indexed values

Returns: str: "file:line:column" or "Definition not found"

Example: ✅ {"file_path": "src/app.ts", "line": 4, "character": 9} → "/path/src/app.ts:15:5"

Get type information and documentation for symbol at position.

🔴 CRITICAL: Line and character are STRICTLY 0-INDEXED (0, 1, 2...), NOT 1-indexed!

❌ WRONG (what editor displays): Editor shows: "Ln 5, Col 10" ❌ DON'T use: {"line": 5, "character": 10}

✅ CORRECT (0-indexed): ✅ DO use: {"line": 4, "character": 9} Formula: lsp_value = editor_value - 1

CHARACTER COUNTING (0-indexed from start of line): Line: "const greeting = "Hello";" Index: 0123456789... • 'c' in const → character: 0 • 'o' in const → character: 1 • 'g' in greeting → character: 6 • 'H' in string → character: 18

Args: params (LSPInput): Must provide line and character as 0-indexed values

Returns: str: Type signature like "(parameter) name: string" or "No info available"

Example: ✅ {"file_path": "src/app.ts", "line": 4, "character": 9} → "(parameter) greeting: string"

Find all usages/references of symbol at position.

🔴 CRITICAL: Line and character are STRICTLY 0-INDEXED (0, 1, 2...), NOT 1-indexed!

❌ WRONG (what editor displays):
  Editor shows: "Ln 5, Col 10"
  ❌ DON'T use: {"line": 5, "character": 10}

✅ CORRECT (0-indexed):
  ✅ DO use: {"line": 4, "character": 9}
  Formula: lsp_value = editor_value - 1

CHARACTER COUNTING (0-indexed from start of line):
  Line: "const greeting = "Hello";"
  Index: 0123456789...
  • 'c' in const → character: 0
  • 'o' in const → character: 1
  • 'g' in greeting → character: 6
  • 'H' in string → character: 18

Args:
    params (LSPInput): Must provide line and character as 0-indexed values

Returns:
    str: "Found N references:

file:line:column ..." or "No references found"

Example:
    ✅ {"file_path": "src/app.ts", "line": 4, "character": 9}
    → "Found 2 references:

/path/src/app.ts:5:9 /path/src/utils.ts:10:2"