# Orchestration Log Entry

### 2026-04-02T16-23-55Z - Lead gate for first diagnostics slice

| Field | Value |
|-------|-------|
| **Agent routed** | McCauley (Lead) |
| **Why chosen** | Needed final architectural gatekeeping on whether the first error-handling slice met Rule 24 parity expectations. |
| **Mode** | `sync` |
| **Why this mode** | The team needed a single binding verdict before implementation and validation could converge. |
| **Files authorized to read** | `src/ExcelMcp.Service/**`, `src/ExcelMcp.McpServer/**`, `src/ExcelMcp.CLI/**`, `tests/ExcelMcp.McpServer.Tests/**`, `tests/ExcelMcp.CLI.Tests/**` |
| **File(s) agent must produce** | `.squad/decisions/inbox/mccauley-error-diagnostics-contract.md` |
| **Outcome** | Completed — conditionally approved the slice, with the blocking decision that CLI must mirror MCP error-envelope fields instead of shipping a divergent failure shape. |
