Cross-Issue Regression Sweep

Find open issues that a PR can affect in addition to its linked issue. Report two relationship types:

• Adjacent fix — The PR can also resolve another issue.
• Conflict — The PR can prevent the behavior that another issue requests.

Prerequisites

• gh CLI authenticated
• A target repository with open issues
• An open PR to scan

Repo policy

The defaults use NemoClaw conventions. Edit repo-policy.md for another repository.

Workflow

Step 1: Extract fingerprint

scripts/extract-fingerprint.sh <pr-number>

The script collects changed files, changed symbols, error strings, and the linked issue. See checks/fingerprint-extraction.md.

Step 2: Search candidate issues

scripts/search-candidate-issues.sh <fingerprint-json>

Search these three inputs. Keep no more than 30 candidates:

• Per symbol: top 10 by recency
• Per file path: top 5 by recency
• Per error string: top 5 by recency

Remove duplicates and the linked issue.

Step 3: Classify each candidate

Classify each candidate with the rules in checks/relationship-judgment.md:

• ADJACENT_FIX — The PR can resolve this issue.
• CONTRADICTING — The PR conflicts with the requested behavior.
• SAME_ISSUE_DIFF — same root bug as PR's primary issue (dedup filter)
• UNRELATED — no meaningful relationship

For ADJACENT_FIX or CONTRADICTING, cite:

• A PR diff line.
• An issue symptom.
• Confidence: high / medium / low

Classify the issue as UNRELATED if this evidence is not available.

Step 4: Reverse-link boost

Increase confidence by one level if the issue body or comments mention the PR number.

Step 5: Filter

• Remove UNRELATED and SAME_ISSUE_DIFF results.
• Remove low-confidence results.
• Keep high- and medium-confidence ADJACENT_FIX and CONTRADICTING results.

Step 6: Render report

scripts/render-report.py < classifications.json

See templates/report.md for the format.

Reference files

• repo-policy.md — Repository settings.
• relationship-rules.md — Four relationship classes and examples.
• checks/fingerprint-extraction.md — Diff evidence by language.
• checks/relationship-judgment.md — Classification and evidence rules.
• templates/report.md — Output template.
• validation/backtest.md — Historical test cases for the skill.

Scripts

• scripts/extract-fingerprint.sh — symbols, paths, and error strings
• scripts/search-candidate-issues.sh — GitHub Search wrapper, dedupe, cap
• scripts/render-report.py — report renderer

Composition with other skills

This skill is an optional follow-up to nemoclaw-maintainer-pr-comparator. The comparator does not run this skill or use its findings in the score. Run this skill when a maintainer asks for related-issue evidence. Report the evidence separately.

Limits

The skill does not:

• run PR code against adversarial inputs
• trace data flow with a static analyzer such as CodeQL or Semgrep
• disambiguate symbols across codebases with a machine-learning model