- Created `scripts/agent/fuzz-utils.mjs` with shared random data generators.
- Created `scripts/agent/fuzz-nostrEventSchemas.mjs` to fuzz event builders and validators, including `sanitizeAdditionalTags`.
- Created `scripts/agent/fuzz-dmDecryptor.mjs` to fuzz DM decryption with mocked decryptors and custom reproducer generation.
- Created `scripts/agent/fuzz-magnetUtils.mjs` to fuzz magnet URI normalization.
- Verified that all fuzz targets run without crashes.
- Saved execution reports to `artifacts/`.