diff --git a/packages/tui/CHANGELOG.md b/packages/tui/CHANGELOG.md
index 7a5b3028..c7e775bb 100644
--- a/packages/tui/CHANGELOG.md
+++ b/packages/tui/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Fixed
+
+- Slash command autocomplete now triggers for commands starting with `.`, `-`, or `_` (e.g., `/.land`, `/-foo`) ([#422](https://github.com/badlogic/pi-mono/issues/422))
+
 ## [0.32.1] - 2026-01-03
 
 ## [0.32.0] - 2026-01-03
diff --git a/packages/tui/src/components/editor.ts b/packages/tui/src/components/editor.ts
index c5765162..82e849a3 100644
--- a/packages/tui/src/components/editor.ts
+++ b/packages/tui/src/components/editor.ts
@@ -834,7 +834,7 @@ export class Editor implements Component {
 				}
 			}
 			// Also auto-trigger when typing letters in a slash command context
-			else if (/[a-zA-Z0-9]/.test(char)) {
+			else if (/[a-zA-Z0-9.\-_]/.test(char)) {
 				const currentLine = this.state.lines[this.state.cursorLine] || "";
 				const textBeforeCursor = currentLine.slice(0, this.state.cursorCol);
 				// Check if we're in a slash command (with or without space for arguments)