Hedera Agent Kit V4 – Policies, Modular Packages, and Plugin Updates

Hedera Agent Kit V4 introduces modular packages, explicit plugin management, and a robust hooks/policies system to govern agent behavior. The update enables four lifecycle hooks (pre-tool, post-parameter, post-core, post-tool) for fine-grained control and auditability, while allowing modular installation to reduce bloat. It also relocates the SDK under a new @hiero-ledger namespace, adds BaseTool architecture, new plugins (e.g., CoinCap, Chainlink), and an Agent Lab for no-code policy experimentation, signaling a major shift toward programmable guardrails and streamlined integration.