fix(stack): prevent push from deleting branches of similarly-named stacks

[sileht]

Add trailing slash to GitHub search query head: filter to use exact
stack prefix matching. Without it, head:bybye prefix-matches both
bybye/... and bybye-v2/... branches, causing the orphan detection
to incorrectly delete branches and close PRs from other stacks.

Co-Authored-By: Claude Opus 4.6 noreply@anthropic.com

[mergify]

Merge Protections

Your pull request matches the following merge protections and will not be merged until they are valid.

🟢 🤖 Continuous Integration

Wonderful, this rule succeeded.

• all of:
  • check-success=ci-gate

🟢 👀 Review Requirements

Wonderful, this rule succeeded.

• any of:
  • #approved-reviews-by>=2
  • author = dependabot[bot]
  • author = mergify-ci-bot
  • author = renovate[bot]

🟢 Enforce conventional commit

Wonderful, this rule succeeded.

Make sure that we follow https://www.conventionalcommits.org/en/v1.0.0/

• title ~= ^(fix|feat|docs|style|refactor|perf|test|build|ci|chore|revert)(?:\(.+\))?:

🟢 🔎 Reviews

Wonderful, this rule succeeded.

• #changes-requested-reviews-by = 0
• #review-requested = 0
• #review-threads-unresolved = 0

🟢 📕 PR description

Wonderful, this rule succeeded.

• body ~= (?ms:.{48,})

[mergify]

🧪 CI Insights

Here's what we observed from your CI run for 0e36adb.

🟢 All jobs passed!

But CI Insights is watching 👀

[Copilot]

Pull request overview

This PR addresses an important correctness issue in the stack push flow where GitHub’s head: search filter can prefix-match similarly named stacks (e.g., bybye/... vs bybye-v2/...), leading to incorrect orphan detection and unintended branch deletions/PR closures.

Changes:

• Update the GitHub Search API query to use head:<stack_prefix>/ to narrow matches to the intended stack namespace.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[mergify]

Merge Queue Status

• ✅ Entered queue — 2026-03-13 09:06 UTC · Rule: default
• ✅ Checks passed · in-place
• ✅ Merged — 2026-03-13 09:06 UTC · at 0e36adb7137bd1696f452838bcf6a1e531941319

This pull request spent 7 seconds in the queue, including 1 second running CI.

Required conditions to merge

• all of [🛡 Merge Protections rule Enforce conventional commit]:
  • title ~= ^(fix|feat|docs|style|refactor|perf|test|build|ci|chore|revert)(?:\(.+\))?:
    • fix(stack): prevent push from deleting branches of similarly-named stacks #1027
• all of [🛡 Merge Protections rule 👀 Review Requirements]:
  • any of:
    • #approved-reviews-by>=2
      • fix(stack): prevent push from deleting branches of similarly-named stacks #1027
    • author = dependabot[bot]
      • fix(stack): prevent push from deleting branches of similarly-named stacks #1027
    • author = mergify-ci-bot
      • fix(stack): prevent push from deleting branches of similarly-named stacks #1027
    • author = renovate[bot]
      • fix(stack): prevent push from deleting branches of similarly-named stacks #1027
• all of [🛡 Merge Protections rule 📕 PR description]:
  • body ~= (?ms:.{48,})
    • fix(stack): prevent push from deleting branches of similarly-named stacks #1027
• all of [🛡 Merge Protections rule 🔎 Reviews]:
  • #changes-requested-reviews-by = 0
    • fix(stack): prevent push from deleting branches of similarly-named stacks #1027
  • #review-requested = 0
    • fix(stack): prevent push from deleting branches of similarly-named stacks #1027
  • #review-threads-unresolved = 0
    • fix(stack): prevent push from deleting branches of similarly-named stacks #1027
• all of [🛡 Merge Protections rule 🤖 Continuous Integration]:
  • all of:
    • check-success=ci-gate