# R013 Code Review — Step 4

Verdict: REVISE

## Findings

1. **`git diff --check` still fails due to trailing whitespace in a committed Step 4 review artifact.**
   `taskplane-tasks/TP-101-claude-desktop-mcpb-extension/.reviews/R012-code-step4.md:7` has trailing spaces, so `git diff 3cdc243..HEAD --check` exits non-zero. R012 fixed the prior R011 whitespace issue, but introduced the same issue in R012 itself. Please strip the trailing whitespace so the Step 4 diff is clean.

## Verification performed

- `git diff 3cdc243..HEAD --name-only`
- `git diff 3cdc243..HEAD`
- Read changed files for context: `PROMPT.md`, `STATUS.md`, `web/content/connect/claude-desktop.md`, `CHANGELOG.md`, MCPB manifest/script/release docs, and prior Step 4 review files.
- `git diff 3cdc243..HEAD --check` — failed on trailing whitespace in `.reviews/R012-code-step4.md`.
- `cd web && hugo` — passed with existing theme deprecation warnings.

## Notes

- The extension-first Claude Desktop documentation builds successfully and preserves the manual JSON/keychain fallback.
- The Step 4 status now records Claude Desktop-mediated `icuvisor_list_advanced_capabilities` validation evidence, so I did not find a remaining install-evidence blocker beyond the whitespace failure above.
