# Task ID: 64

**Title:** Add unit tests for tag matching algorithm

**Status:** done

**Dependencies:** 45 ✓

**Priority:** high

**Description:** Create comprehensive unit tests for the deterministic tag matching algorithm covering score calculation, byte budget, and priority handling.

**Details:**

1. Add tests in `/src/mcplocal/tests/services/tag-matcher.test.ts`:
   ```typescript
   describe('TagMatcherService', () => {
     describe('score calculation', () => {
       it('priority 10 prompts have infinite score', () => {
         const score = matcher.computeScore(['any'], { priority: 10, ... });
         expect(score).toBe(Infinity);
       });
       
       it('score = matching_tags * priority', () => {
         const score = matcher.computeScore(
           ['tag1', 'tag2'],
           { priority: 5, summary: 'tag1 tag2', chapters: [] }
         );
         expect(score).toBe(10); // 2 tags * 5 priority
       });
     });
     
     describe('matching', () => {
       it('matches case-insensitively', () => {
         const matches = matcher.matchesPrompt('ZIGBEE', { summary: 'zigbee setup' });
         expect(matches).toBe(true);
       });
       
       it('matches substring in summary', () => { ... });
       it('matches substring in chapters', () => { ... });
     });
     
     describe('byte budget', () => {
       it('includes full content until budget exhausted', () => { ... });
       it('matched prompts beyond budget become index entries', () => { ... });
       it('non-matched prompts listed as names only', () => { ... });
     });
   });
   ```

**Test Strategy:**

This task IS the test implementation. Verify:
- Score calculation tests pass
- Matching tests cover all cases
- Byte budget tests verify allocation
- Edge cases handled (empty tags, no prompts, etc.)
- Tests are deterministic