René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`gh stack sync` merged approved PRs into bottom branch","articleBody":"### Reproduction steps:\n\n1. Create a stack of PRs\n   - tailscale/tailscale#19642\n   - tailscale/tailscale#19643\n   - tailscale/tailscale#19658\n   - tailscale/tailscale#19950\n2. Approve all of them\n3. Run `git stack sync`\n\n### Actual result\n\n``` console\nsfllaw@h2co3:~/src/tailscale_sfllaw-routecheck-for-reachability$ gh stack sync\n✓ Fetched latest changes from origin\n⚠ Failed to fast-forward main: failed to run git: fatal: cannot force update the branch 'main' used by worktree at '/home/sfllaw/Projects/tailscale'\n\n\nRebasing stack ...\n✓ Rebased sfllaw/routecheck-for-reachability onto main\n✓ Rebased sfllaw/routecheck/tailscale-routecheck-cli-jsonoutput onto sfllaw/routecheck-for-reachability\n✓ Rebased sfllaw/routecheck/suggest-exit-node-force-probe onto sfllaw/routecheck/tailscale-routecheck-cli-jsonoutput\n✓ Rebased sfllaw/routecheck/suggest-exit-node onto sfllaw/routecheck/suggest-exit-node-force-probe\n✓ Rebased sfllaw/routecheck/background-probing onto sfllaw/routecheck/suggest-exit-node\n\nPushing 5 branches to origin...\n✓ Pushed 5 branches\n\nSyncing PRs ...\n⚠ sfllaw/routecheck-for-reachability has no PR\n✓ PR #19950 (sfllaw/routecheck/tailscale-routecheck-cli-jsonoutput) — Open\n✓ PR #19658 (sfllaw/routecheck/suggest-exit-node-force-probe) — Open\n✓ PR #19643 (sfllaw/routecheck/suggest-exit-node) — Open\n✓ PR #19642 (sfllaw/routecheck/background-probing) — Open\n\n✓ Stack synced\nsfllaw@h2co3:~/src/tailscale_sfllaw-routecheck-for-reachability$ gh stack view --short\n├ sfllaw/routecheck/background-probing ○ #19642\n├─── merged ────\n│ sfllaw/routecheck/suggest-exit-node ✓ #19643\n│ sfllaw/routecheck/suggest-exit-node-force-probe ✓ #19658\n│ sfllaw/routecheck/tailscale-routecheck-cli-jsonoutput ✓ #19950\n» sfllaw/routecheck-for-reachability (current)\n└ main\n```\n\n### Expected result\n\nI didn’t expect any auto-merging. `git stack sync` should have just rebased and updated the refs:\n\n``` console\nsfllaw@h2co3:~/src/tailscale_sfllaw-routecheck-for-reachability$ gh stack view --short\n│ sfllaw/routecheck/background-probing ○ #19642\n│ sfllaw/routecheck/suggest-exit-node ○ #19643\n│ sfllaw/routecheck/suggest-exit-node-force-probe ○ #19658\n│ sfllaw/routecheck/tailscale-routecheck-cli-jsonoutput ○ #19950\n» sfllaw/routecheck-for-reachability (current)\n└ main\n```\n\n### Related\n\n- #144","author":{"url":"https://github.com/sfllaw","@type":"Person","name":"sfllaw"},"datePublished":"2026-06-29T17:19:12.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/155/gh-stack/issues/155"}