feat(coding-agent): use hash fragments for share URLs (#829)

Fixes #828

packages/coding-agent/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Changed
+
+- Share URLs now use hash fragments (`#`) instead of query strings (`?`) to prevent session IDs from being sent to buildwithpi.ai ([#828](https://github.com/badlogic/pi-mono/issues/828))
+
 ## [0.49.0] - 2026-01-17
 
 ### Added

packages/coding-agent/src/modes/interactive/interactive-mode.ts

@@ -3297,7 +3297,7 @@ export class InteractiveMode {
 			}
 
 			// Create the preview URL
-			const previewUrl = `https://buildwithpi.ai/session?${gistId}`;
+			const previewUrl = `https://buildwithpi.ai/session/#${gistId}`;
 			this.showStatus(`Share URL: ${previewUrl}\nGist: ${gistUrl}`);
 		} catch (error: unknown) {
 			if (!loader.signal.aborted) {