Start a fresh conversation. Replace the highlighted placeholders.
Use reproduce-regression to reproduce regression candidate [candidate] from its sealed preparation/discovery packages and registry assignment by deploying live S0 and S1, creating a portable identical-input PoC, and sealing reproduce.json with the observed behavior or exact blocker.
Required inputs
[candidate]
User-approved starter prompt based on a pinned source version; check current skill requirements before running. Task evidence ↗
SKILL.md
name: reproduce-regressiondescription: Use when deploying before/after systems and building a live-system PoC for a regression candidate.
Reproduce a candidate
When to Use
Input: sealed preparation/discovery packages, candidate and registry assignment.
Follow project guidance before target work.
When NOT to Use
Independent verification of an existing PoC; use replay.
Reproduce
Read the standard and
file contract. Verify inputs; read security
guidance. Stop execution if prerequisites fail.
Build and run actual S0/S1 with required services. Trace the candidate to a real
user/attacker entry point. Build/install CLIs and libraries; exercise supported
interfaces. For build findings, execute the supported build workflow.
Create and execute a portable PoC against both live deployments with identical
input and comparable configuration. Record whether S0 behaves correctly and S1
exhibits the claimed failure. No mocks, extracted functions or simulated systems.
Save setup, tool/dependency versions, sanitized configuration, input, PoC,
revisions, commands and separate logs. Record observations and false-positive
checks in reproduce.json. If blocked, retain attempted setup and exact prerequisites.
Build and deploy only inside your attempt directory, and list every build directory in build_dirs.
Release temporary resources without deleting evidence. Record their disposition,
then seal the package.
Report Back
Keep detailed evidence in the sealed package. Return only:
Status: complete or blocked, matching the record.
Record: sealed reproduce.json path, or why none was produced.
Result: one sentence describing observed S0/S1 behavior.
Blocker: missing prerequisite or required caller action, if blocked.
Completion means the experiment finished, not that the regression is confirmed.
Rationalizations to Reject
“The unit test proves it”: synthetic tests cannot establish a regression.
reproduce-regression by trailofbits · The Skill Leaderboard