You are in AUTONOMOUS MODE. Do NOT ask questions. Parse the git history and produce a well-structured CHANGELOG.md.
INPUT: $ARGUMENTS
Accepted arguments:
- No arguments: generate full changelog from all git history.
since vX.Y.Zorsince <tag>: generate only entries since that tag/version.unreleased: generate only the Unreleased section since the last tag.update: read existing CHANGELOG.md, append only new entries since last documented version.
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[Description truncada. Veja o README completo no GitHub.]