check-pr skill

Check PR

Analyze a pull request (GitHub), merge request (GitLab), or shelved changelist (Perforce) for review comments, status checks, and description completeness, then help address any issues found.

Inputs

• PR/MR/CL number (optional): If not provided, detect the PR/MR for the current branch, or the default pending changelist for p4.

Instructions

0. Detect platform

First check if the user is working in a Perforce depot by looking for a .p4config file or P4CLIENT/P4PORT environment variables:

# Check for Perforce environment
if p4 info >/dev/null 2>&1; then
  VCS="perforce"
else
  # Fall back to git remote detection
  REMOTE_URL=$(git remote get-url origin)
  if echo "$REMOTE_URL" | grep -qi "gitlab"; then
    VCS="gitlab"
  else
    VCS="github"
  fi
fi

For self-hosted GitLab instances whose hostname doesn't contain "gitlab", the user can override by passing --vcs gitlab as an input. For Perforce, the user can override by passing --vcs perforce.

1. Identify the PR/MR/CL

If a number was provided, use it. Otherwise, detect it:

GitHub:

gh pr view --json number,headRefName,headRefOid -q '{number: .number, branch: .headRefName, head: .headRefOid}'

GitLab:

glab mr view --output json | jq '.iid'

Perforce:

# List pending changelists for the current user/client
p4 changes -s pending -u $P4USER -c $P4CLIENT

Key field differences between platforms:

• GitHub: number, headRefName, headRefOid
• GitLab: iid, source_branch, sha
• Perforce: changelist number (CL), shelved files for in-review CLs

2. Fetch PR/MR/CL details

GitHub:

gh pr view <PR_NUMBER> --json title,body,state,reviews,comments,headRefName,headRefOid,statusCheckRollup
OWNER_REPO=$(gh repo view --json nameWithOwner -q .nameWithOwner)
gh api "repos/$OWNER_REPO/pulls/<PR_NUMBER>/comments"
gh api --paginate "repos/$OWNER_REPO/issues/<PR_NUMBER>/comments?per_page=100"

GitHub PRs are also issues, so general PR comments live on the issue comments endpoint. Greptile may edit a single general PR comment on each review cycle instead of creating a new review or comment. Always inspect the latest Greptile-authored general comment by updated_at, including any "Prompt to fix all with AI" section, before concluding that the PR is clear.

GitLab:

glab mr view <MR_IID> --output json
# Fetch discussions (inline diff comments are type "DiffNote"; general comments have null type)
glab api "projects/:fullpath/merge_requests/<MR_IID>/discussions"

For GitLab, paginate discussions if needed (add ?per_page=100&page=N).

Perforce:

# Get changelist description, files, and status
p4 describe -s <CL_NUMBER>

# Get shelved files (for in-review CLs)
p4 describe -S <CL_NUMBER>

# Get the diff of the shelved changelist
p4 diff2 //...@=<CL_NUMBER> //...@=<CL_NUMBER>

# List review comments (if using p4 review workflow)
p4 review -c <CL_NUMBER>

Key Perforce CL fields:

• Change: changelist number
• Status: pending, submitted, shelved
• Description: the CL description / commit message
• Files: list of files in the CL

3. Wait for pending checks

Before analyzing, ensure all status checks have completed. If any checks are PENDING or IN_PROGRESS (GitHub) / running or pending (GitLab), poll every 30 seconds until all checks reach a terminal state.

GitHub: poll statusCheckRollup from gh pr view.

GitLab:

glab api "projects/:fullpath/merge_requests/<MR_IID>/pipelines"

Pipeline statuses: running, pending, success, failed, canceled, skipped. Poll until no pipeline has running or pending status.

Perforce: Perforce doesn't have built-in CI checks natively. If the team uses a review tool (Swarm, etc.) or an external CI triggered by shelve events, check the relevant system. Otherwise, proceed to analysis immediately.

4. Require a fresh Greptile review for the current head

For GitHub PRs, do not treat an existing Greptile review, comment, or summary as current unless it is tied to the PR's exact current headRefOid. This is especially important after pushing a new commit to an existing PR: a Greptile review on an older commit is stale, even if the PR still has a Greptile comment or prior review.

Fetch the current head SHA immediately before the Greptile gate:

HEAD_SHA=$(gh pr view <PR_NUMBER> --json headRefOid -q .headRefOid)

Then inspect check-runs for that commit and require a completed Greptile run:

OWNER_REPO=$(gh repo view --json nameWithOwner -q .nameWithOwner)
GREPTILE_CHECKS=$(gh api "repos/$OWNER_REPO/commits/$HEAD_SHA/check-runs?per_page=100" \
  --jq '[.check_runs[] | select(.name | test("greptile"; "i"))]')

# A run only counts as a valid fresh pass when it has completed AND concluded cleanly.
# GitHub check-run conclusions: success, neutral, skipped, failure, timed_out,
# cancelled, action_required, stale. Treat success/neutral as clean;
# everything else (especially failure and action_required) must block.
FRESH_GREPTILE_COMPLETED=$(echo "$GREPTILE_CHECKS" \
  | jq '[.[] | select(.status == "completed")] | length')
FRESH_GREPTILE_CLEAN=$(echo "$GREPTILE_CHECKS" \
  | jq '[.[] | select(.status == "completed" and (.conclusion | IN("success","neutral")))] | length')
FRESH_GREPTILE_BLOCKING=$(echo "$GREPTILE_CHECKS" \
  | jq '[.[] | select(.status == "completed" and ((.conclusion | IN("success","neutral")) | not))] | length')

if [ "$FRESH_GREPTILE_COMPLETED" = "0" ]; then
  echo "Blocked: no completed Greptile review/check is tied to current PR head $HEAD_SHA."
  echo "Request a fresh Greptile review against this head before marking the PR check done."
  echo "Suggeste

If a Greptile check exists for the current head but is still pending or in progress, wait for it with the same polling pattern used by greploop rather than proceeding from older review material. If no Greptile check appears for the current head after a reasonable wait, report the PR as blocked on a fresh Greptile review for HEAD_SHA and stop. Do not mark the check complete from PR comments, PR reviews, or Greptile summaries that cannot be associated with the current head SHA.

For GitLab installations with Greptile integration, apply the same freshness rule against the MR's current head SHA:

# 1. Get the MR's current head SHA
MR_SHA=$(glab mr view <MR_IID> --output json | jq -r '.sha // .diff_refs.head_sha')

# 2. Find the latest pipeline for that EXACT sha, then the Greptile job within it.
LATEST_PIPELINE_ID=$(glab api "projects/:fullpath/merge_requests/<MR_IID>/pipelines" \
  | jq -r --arg sha "$MR_SHA" '[.[] | select(.sha == $sha)] | sort_by(.id) | last | .id // empty')

if [ -n "$LATEST_PIPELINE_ID" ]; then
  GREPTILE_JOBS=$(glab api "projects/:fullpath/pipelines/$LATEST_PIPELINE_ID/jobs" \
    | jq --arg sha "$MR_SHA" '[.[] | select(.name | test("greptile"; "i"))
        | {name, status, pipeline_sha: $sha}]')
else
  GREPTILE_JOBS='[]'
fi

GREPTILE_JOB_SUCCESS=$(echo "$GREPTILE_JOBS" \
  | jq '[.[] | select(.status == "success")] | length')
GREPTILE_JOB_BLOCKING=$(echo "$GREPTILE_JOBS" \
  | jq '[.[] | select(.status != "success")] | length')

# 3. If Greptile integrates via MR notes instead of a CI job, require the newest
#    Greptile note to reference the current head sha and report a clean review.
GREPTILE_NOTES=$(glab api "projects/:fullpath/merge_requests/<MR_IID>/discussions?per_page=100" \
  | jq --arg sha "$MR_SHA" '[.[].notes[]
      | select(.author.use

Block completion if, for MR_SHA, there is (a) no Greptile job or note at all (missing), (b) the newest Greptile job/note is tied to a different sha (stale), or (c) the Greptile job status is not success. A completed Greptile result for a different SHA is stale and must block completion.

For Perforce installations with Greptile integration, apply the same rule using the CL's current shelved-revision identity and the Greptile webhook/review artifact tied to it; a Greptile result for an earlier shelf is stale and must block completion.

5. Analyze the PR/MR

Once all checks are complete, evaluate these areas:

A. Status Checks

• Are all CI checks passing?
• If any are failing, identify which ones and the failure reason.

B. PR/MR Description

• Is the description complete and follows team conventions?
• Are all required sections filled in?
• Are there TODOs or placeholders that need updating?

C. Review Comments

• Inline code review comments that need addressing
• Look for bot review comments (e.g. from greptile-apps[bot] on GitHub, or the Greptile bot user on GitLab, linters, etc.)
• Human reviewer comments
• Perforce: review comments from p4 review or external review tools

D. General Comments

• Discussion comments on the PR/MR
• For GitHub, check the issue comments endpoint and use updated_at to catch bot comments edited in place. Greptile's latest edited summary can contain actionable items even when there are no new inline comments.
• Bot comments (deploy previews, etc.) - usually informational
• Perforce: CL description should include a clear summary, affected files rationale, and testing notes

6. Categorize issues

For each issue found, categorize as: