Build ProtoBot's first single-player vertical slice

Purpose

Turn the approved architecture into the smallest runnable ProtoBot system. The slice should let a local developer use the Specification Toolkit in OpenCode, create or revise governed specification records through ears-manager, record reviewable Git history, and persist the corresponding request/work-item state through a minimal WMS boundary.

Outcome

A fixture project can demonstrate:

• a user starts or resumes a local Drafting Table session;
• the agent invokes a reusable Toolkit skill;
• ears-manager validates and writes a proposed specification change;
• Git records the governed change on a reviewable branch;
• the WMS boundary records the request or build-work-item contract with deterministic validation;
• all state and failure boundaries are observable in tests or a recorded demonstration.

Out of scope

• Web Drafting Table.
• Multiple WMS backends beyond the first GitHub-compatible path or test double.
• Hosted OpenShift deployment.
• Full autonomous Job Site execution before the control-plane contracts work.
• Production-scale performance, multi-tenancy, or every prototype output type.

Related contracts

The work builds on #28, #30, #31, #32, #33, #34, #46, #56, and PRs #61 and #64. Child issues below are implementation slices, not replacements for those design contracts.

Exit criteria

• The complete local flow is executable against a fixture project.
• The flow has deterministic tests for valid input, invalid specification data, stale WMS mutations, and Git failure.
• The fixture demonstrates that specification writes do not bypass ears-manager.
• The implementation remains backend-neutral at the documented boundaries.

Start by reading the related contracts in issues #28, #30, #31, #32, #33, #34, #46 and #56, plus PRs #61 and #64. Use the fixture project and local flow described in the outcome as the investigation boundary, then verify completion against the deterministic valid, invalid, stale-WMS, and Git-failure cases in the exit criteria.