Merging PRs

What it does

When your agent uses it

• Asked to merge a PR
• Merge when ready
• Babysit/watch a PR through the queue

Example prompts

• “/trunk merge”
• “Trunk Merge Queue”
• “merge when ready”
• “/merging-prs”

Requirements

• Pre-approved tools (allowed-tools): Bash(gh pr view:*), Bash(gh pr checks:*), Bash(gh pr comment:*), Bash(gh pr ready:*), Bash(gh api:*), Bash(sleep:*)

Workflow steps

5 steps, taken from the step headings in SKILL.md.

1. 1Preflight
2. 2Enqueue
3. 3Poll until it lands
4. 4Handle failure
5. 5Cancel

What it can do on your machine

Read from SKILL.md and the folder at commit a4c32df. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Bash(gh pr view:*)
  • Bash(gh pr checks:*)
  • Bash(gh pr comment:*)
  • Bash(gh pr ready:*)
  • Bash(gh api:*)
  • Bash(sleep:*)

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • gh

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • trunk.io

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Merging PRs loads about 1.3k tokens when it runs. Until then it costs about 121 tokens; SKILL.md has 616 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~121

When it runs · the whole SKILL.md, loaded when a task matches

~1.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from PostHog/code at commit a4c32df, republished under its MIT licence (© PostHog). 616 words, ~1,338 tokens.

name

merging-prs

description

Merge a PR into main through the Trunk merge queue and babysit it until it lands. Enqueue with a "/trunk merge" comment, then poll the "Trunk Merge Queue" check run and the PR state until it is MERGED or FAILED, reporting the Trunk bot's failure reason if the PR is kicked out. Use when asked to merge a PR, "merge when ready", "land it", "ship it", or to babysit/watch a PR through the queue. Never use `gh pr merge` in this repo -- the queue is the only path into main.

allowed-tools

Bash(gh pr view:*), Bash(gh pr checks:*), Bash(gh pr comment:*), Bash(gh pr ready:*), Bash(gh api:*), Bash(sleep:*)

gh pr view <n> --json state,isDraft,mergeable,reviewDecision,statusCheckRollup

gh pr comment <n> --body "/trunk merge"

SHA=$(gh pr view <n> --json headRefOid -q .headRefOid)
gh api repos/$REPO/commits/$SHA/check-runs \
  --jq '.check_runs[] | select(.name | startswith("Trunk Merge Queue")) | {name, status, conclusion, details_url}'

gh pr view <n> --json state,mergedAt          # MERGED  -> success, stop
SHA=$(gh pr view <n> --json headRefOid -q .headRefOid)
gh api repos/$REPO/commits/$SHA/check-runs \
  --jq '.check_runs[] | select(.name | startswith("Trunk Merge Queue")) | {status, conclusion, details_url}'
sleep 60

gh pr view <n> --comments | tail -n 40

gh pr comment <n> --body "/trunk cancel"

© PostHog, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .claude/skills/merging-prs of PostHog/code.

Open the folder on GitHubat commit a4c32df