Write focused unit test coverage

Write focused unit tests for specific coverage gaps

When you need to raise test coverage without weakening behavior under focused branch requirements.

• · target implementation file
• · coverage gap description
• · nearest existing test

• · new Vitest/msw test file
• · single behavior assertion covering the gap

• · Vitest
• · msw (mock service worker)
• · tdMock test helpers

Assigned specific coverage gap, implementation and test infrastructure already in place

• · Test only marks lines visited (import-for-coverage)
• · Oversized snapshot instead of behavior
• · New scaffolding instead of existing helpers

• · Prefers real CallToolResult text/JSON blocks
• · Avoids import-for-coverage anti-pattern
• · Reuses existing helpers (tdMock, KnowledgeBase, RecipeLibrary)