whetstone_DSL/sprint138_plan.md

Sprint 138 Plan: Distributed Orchestrator-to-MCP Handoff Consistency

Context

As orchestration spreads across nodes, MCP handoffs must preserve deterministic context and tool contracts. Sprint 138 seals handoff consistency.

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Goals

1. Normalize orchestrator-to-MCP handoff packets across nodes
2. Preserve deterministic context slices and tool arguments
3. Detect handoff drift between submitter and executor nodes
4. Export handoff integrity evidence for distributed debugging

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Steps

Step 1619: Orchestrator MCP handoff packet schema (10 tests)

Step 1620: Context slice canonicalization for handoffs (10 tests)

Step 1621: Cross-node handoff drift detector model (10 tests)

Step 1622: Distributed handoff replay verifier (10 tests)

Step 1623: whetstone_capture_handoff_packet MCP tool (8 tests)

Step 1624: whetstone_verify_handoff_integrity MCP tool (8 tests)

Step 1625: whetstone_list_handoff_divergences MCP tool (8 tests)

Step 1626: Handoff confidence scorer model (8 tests)

Step 1627: Handoff integrity report artifact (8 tests)

Step 1628: Sprint 138 integration summary + regression (8 tests)

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Architecture Gate

• Handoff packets must be deterministic and replayable
• Drift reports must be structured with explicit field-level differences
• Context canonicalization must be stable across nodes
• Max 600 lines per header