# Review R004 — Code review for Step 1

**Verdict:** APPROVE

The Step 1 research/status update now satisfies the task requirements. The prior R003 bookkeeping issues are fixed: the review table includes R001-R003, `Review Counter` is consistent with those artifacts, and the execution-log rows are in the `## Execution Log` table rather than leaking into Notes.

## Findings

None blocking.

## Validation notes

- Reviewed `git diff 9bcc20363c31dbd2ac3d48d436a0bb5107affd5f..HEAD --name-only` and the full diff.
- Re-read `PROMPT.md`, `STATUS.md`, and the changed review artifacts.
- Spot-checked the repo facts behind the Step 1 summary:
  - `go.mod` uses `the MCP Go SDK v1.6.0`.
  - The SDK exposes `SSEOptions`, `NewSSEHandler`, `SSEServerTransport`, and `SSEClientTransport`.
  - Current icuvisor transport wiring only selects `stdio` or `http`, and HTTP runs Streamable HTTP at `/mcp` with default bind `127.0.0.1:8765`.
  - Existing docs warn that LAN HTTP exposes an unauthenticated MCP server using the configured intervals.icu credentials.
- Spot-checked the cited external URLs were reachable and contained the key transport/tunnel statements summarized in `STATUS.md`.

No code changed in this step, so I did not run the full test/build/lint suite.
