Hunt Regressions
Use when discovering possible regressions from a pinned change and its callers before...
Install
npx skills add trailofbits/skills --skill hunt-regressions -g -a claude-code -y- Repository
- trailofbits/skills7.9k
- Category
- Engineering
- Updated
- 7d ago
- License
- CC-BY-SA-4.0
- Context cost
- Lightabout 486 tokens
- Runs scripts
- No, instructions only
What it does
Use when discovering possible regressions from a pinned change and its callers before reproduction.
Discover candidates
When to Use
Input: sealed preparation, frozen S0/S1, change context and registry assignment. On retry, include this assignment's prior candidate-ID mapping. The caller supplies these, including for independent use. Follow project guidance before target work.
When NOT to Use
Proving a known candidate; use reproduction. Discovery cannot confirm findings.
Hunt
- Read the standard and file contract. Verify preparation; read frozen change messages, PR discussion and security documentation for intent and supported use.
- Review the entire diff; trace changed behavior through callers to real interfaces. Use frozen sources and supplied context, not later fixes, advisories or other reviews.
- Record each lead's changed code, previously supported behavior, reachable trigger, proposed new defect, false-positive checks and required proof. Retain supplied leads suggesting old bugs or incomplete fixes for adjudication. Leave PoC construction to reproduction.
- Reserve each lead's ID through registry.py
candidateusing its stable hypothesis key and assigned agent handle. Reuse the key on retry. Write candidate files andhunt.jsonwith IDs, file mappings, coverage and limitations. An empty list is valid. If blocked, record partial coverage and uninspected areas. Seal the package.
Report Back
Keep detailed evidence in the sealed package. Return only:
- Status:
completeorblocked, matching the record. - Record: sealed
hunt.jsonpath, or why none was produced. - Result: candidate count and material coverage gaps.
- Blocker: missing prerequisite or required caller action, if blocked.
Rationalizations to Reject
- “A helper fails on invented input”: show a supported interface that reaches it.
