The Pre-Commit Review Gate

flowchart TB
  A([Agent edits code]) --> B{{git commit}}
  B --> H[/PreToolUse hook/]
  H --> C{Trivial diff?<br/>Doc-only?<br/>Plan mode?}
  C -->|yes| OK([allow commit])
  C -->|no| D{Artifact valid?<br/>hash matches?<br/>verdict CLEAN?}
  D -->|yes| OK
  D -->|no| DENY[/deny + return<br/>review prompt/]
  DENY --> SUB([general-purpose<br/>sub-agent review])
  SUB --> F{Findings?}
  F -->|N findings| FIX([fix in working tree])
  FIX --> SUB
  F -->|CLEAN| ART[(write artifact:<br/>diff hash + verdict)]
  ART --> B