vllm-backport-classify

name	vllm-backport-classify
description	Classify bugfix PRs by type (runtime_bug, platform_specific, unclear, not_bugfix) and filter by file existence at a release tag. Use after fetching raw PRs to produce a filtered candidate list. PRs marked "unclear" need agent review.
compatibility	Requires gh CLI (authenticated), git, python3
allowed-tools	Bash Read
metadata	{"author":"ZhanqiuHu","version":"1.0","tags":"vllm, backport, triage"}

Classify and Filter

Applies deterministic regex rules to classify PRs, checks which files existed at the target release tag, detects subsystems, and filters out PRs that only touch post-release or non-runtime code.

Usage

python3 scripts/classify-and-filter.py \
  --input artifacts/backport-triage/raw-prs.json \
  --repo /path/to/vllm \
  --tag v0.13.0 \
  --output artifacts/backport-triage/filtered.json

Input

raw-prs.json — output of the vllm-backport-fetch-prs skill.

Output

filtered.json — same PR objects enriched with:

• classification: runtime_bug, platform_specific, unclear, not_bugfix
• verdict: CANDIDATE or SKIP
• skip_reason: why skipped (if applicable)
• files, files_in_release, files_new, files_in_release_count, files_total
• subsystems: list of detected vLLM subsystem names

Agent Follow-up

After running this skill, review PRs with classification: "unclear". Read each PR's description and decide if it's a real bugfix. Override the classification in the JSON if needed.

Bugfix PRs in vLLM often have misleading titles — always check the actual diff and description, not just the title.