Short session IDs shown by CC cannot be used with /resume (requires full UUID)

Summary

Claude Code displays short session IDs (e.g. 9087632b) in its UI, but /resume only accepts full UUIDs (e.g. 9087632b-3d6a-4401-8d30-f120f2e84411). This makes the displayed IDs useless for resumption.

Steps to reproduce

1. Note the short session ID shown by Claude Code (e.g. in the /resume session list or the session header)
2. Run /resume 9087632b

Result: Session 9087632b was not found.

Expected: /resume accepts the same short ID format that CC displays, or the UI displays the full UUID that /resume actually requires.

Why this matters

CC switched to displaying short IDs, but /resume was not updated to match. The ID you're shown is literally not the ID you can use. Either the display format and the resume format need to match, or /resume should accept prefix matches of the full UUID.

Environment

• Claude Code version: 2.1.132
• Platform: macOS 24.6.0