LightAgent v0.9.4

Highlights

LightAgent v0.9.4 strengthens tool contracts, policy enforcement, runtime lifecycle coverage, and LightSwarm handoff consistency.

• Add explicit tool schema diagnostics through ToolRegistry.validate_tool_info(...), ToolRegistry.validate_tools(), and LightAgent.validate_tools().
• Detect malformed tool metadata, duplicate parameter definitions, and duplicate tool names registered by different callables.
• Add PolicyHook with phase restrictions, fail-closed behavior, and configurable sync/async timeouts.
• Add the on_handoff lifecycle hook with blocking, failure tracing, parent trace propagation, and consistent source-run closure.
• Preserve user_id, metadata, tracing options, result format, retry limits, and tool-iteration limits across LightSwarm entry runs and delegated handoffs (#79, #80).
• Expand GitHub CI to execute the complete tracked test suite on Python 3.10, 3.11, and 3.12.
• Update tool, runtime hook, README, and roadmap documentation for the new contracts and lifecycle behavior.

Compatibility

• Existing agent.run("hello") and streaming calls remain compatible.
• Tool diagnostics are explicit and read-only; registration behavior is unchanged unless an application chooses to validate and act on diagnostics.
• Existing plain runtime hooks remain failure-isolated. Fail-closed behavior is enabled explicitly through PolicyHook.
• Existing LightSwarm calls remain compatible while runtime context is now preserved during delegation.

Validation

• GitHub CI passed on Python 3.10, 3.11, and 3.12.
• Each CI environment completed all 102 tracked tests.
• Local validation on the release commit: 102 passed.
• Package compilation and repository diff checks passed for the v0.9.4 implementation PR.

Full changes: v0.9.3...v0.9.4