What do the colored dots (green/yellow) mean in Worktree Tabs panel?

Question

In the Claude Code Desktop app, the Worktree Tabs panel shows colored dots next to each worktree name. Some dots are green and some are yellow/amber.

What I observed

• Green dots appear on worktrees that have PRs with "Merged" status
• Yellow dots appear on worktrees that have "No PR"
• One edge case: a worktree with "No PR" (a rebase of a branch that already has a merged PR) appears to show a green dot

Screenshot

!Worktree Tabs panel

(The screenshot shows ~9 worktrees with a mix of green and yellow dots, PR statuses like "Merged · today", "Merged · yesterday", and "No PR")

Request

Could you document what these color indicators mean? It's not immediately intuitive, and there's no tooltip or legend explaining the states.

Possible interpretations:

1. Green = PR merged, Yellow = No PR / pending
2. Green = active session, Yellow = idle
3. Something else?

Thanks!