[Feature] Module Versioning and Compatibility System

[tercel]

Problem Description

Currently, modules are identified by ID, but there's no formal specification for versioning (e.g., SemVer for modules) or how to handle breaking changes in a distributed agentic environment.

Why solve it

As ecosystems grow, modules will evolve. Agents need to know if they are calling a compatible version of a tool to avoid runtime failures.

• Robustness: Preventing issues due to mismatched schemas or behavioral changes.
• Compatibility: Allowing side-by-side versions or automated version negotiation.
• Ecosystem Scale: Enabling reliable updates for modules in production.

How to solve it

1. Metadata Field: Add a version field to the module metadata.
2. Negotiation Algorithm: Define a negotiate_version algorithm (Algorithm A14) in PROTOCOL_SPEC.md.
3. Registry Update: Implement version-aware lookup and resolution in the Registry API.
4. Compatibility Check: Specify rules for SemVer usage in modules (e.g., how to handle minor vs. major version bumps in schemas).