Verification Before Completion (superpowers)
Iron law: no completion claim without fresh verification evidence. Identify the command that proves the claim, run it in full, read the output and exit code, then state the claim with the evidence.
proof: tests run countproof: logs blocks: claims done without running checksblocks: stale run before last edit
Source
https://github.com/obra/superpowers/blob/main/skills/verification-before-completion/SKILL.mdChecked 2026-10-16. Read the original before installing.
By harness
| Harness | Status | How |
|---|---|---|
| Cursor | adapted | Copy SKILL.md body into .cursor/rules/<name>.mdc with alwaysApply: false and a description so the agent pulls it in. Untested as a rule. |
| Claude Code | native | Install as .claude/skills/verification-before-completion/SKILL.md or via the superpowers plugin. |
| Grok Build | native | Grok Build reads Claude Code skills from .claude/skills/ alongside .grok/skills/ (per docs.x.ai skills page). |
| Codex | untested | Paste the core checklist into AGENTS.md. Codex has no SKILL.md loader in the cited docs; untested. |
| AGENTS.md generic | untested | Paste the checklist section into AGENTS.md. Untested. |
By model family
| Claude | source (written for Claude Code) |
| GPT | untested |
| Grok | untested |
| Gemini | untested |
Sponsor slot: your verification tool here, one sponsor per week. Details
Proof of the week
One verification pattern every week, adapted per harness and model. No spam.