v1.0.16

Summary

• Adds Task Contract and handoff_packet guidance to keep spec, implementation, and review aligned across multi-agent work.
• Adds AHE mechanism registries and router/skill benchmark scenarios for small-model drift detection.
• Extends mechanical harness checks and regression tests for the new contracts.

Validation

• node --check scripts/check-harness.mjs
• node scripts/check-harness.mjs
• node --test scripts/check-harness.test.mjs
• ./scripts/check.sh
• git diff --check