fix: suppress QUICK classification announcement and deduplicate classification rules

[dean0x]

Summary

Suppresses noisy QUICK classification announcements in preamble hook and eliminates redundant loading of classification rules during ambient router initialization. Conditional router loading gates output to GUIDED and ORCHESTRATED depths only.

Changes

• Preamble hook: Conditional router loading based on classification depth
• Session-start-classification: Early exit for QUICK depth to skip announcements
• Skill references: Extract classification-rules.md from router/references/ to router/ to streamline the preamble execution path
• Tests: Updated ambient activation and classification test paths

Breaking Changes

None

Testing

• Ambient classification tests pass
• Skill reference tests pass
• Integration tests pass

Related Issues

Relates to ambient classification noise reduction.

[dean0x]

PR Comments Created

Inline Comments

• 1 inline comment created for missing assertion in QUICK-tier slash command test
• Skipped: 0 (no duplicates detected)

Summary

One blocking MEDIUM issue found across architecture, testing, and consistency reviews: the fourth QUICK-tier test (slash-command preamble filter) is missing the hasClassification assertion that should verify QUICK prompts don't emit classification output. This is a regression guard for the PR's core behavior change.

[dean0x]

tests/integration/ambient-activation.test.ts (Line 57-62)

Missing hasClassification assertion in slash-command preamble filter test.

Three of the four QUICK-tier tests (lines 38, 45, 53) correctly assert expect(hasClassification(result)).toBe(false), but the fourth test at lines 57-62 does not include this check. Since this test shares the same semantic contract with the others (QUICK prompts should suppress classification output), this assertion should be added for consistency.

Suggested fix:

it('preamble filter — slash command prefix skipped before classification', async () => {
  const result = await runClaudeStreaming('/help with something', { timeout: 20000 });
  expect(hasSkillInvocations(result)).toBe(false);
  expect(hasClassification(result)).toBe(false);  // ← Add this line
  console.log(`preamble filter (slash command): no skills (${result.durationMs}ms)`);
});

Confidence: 90% | Category: Test assertion consistency | Reviewers: Testing (82%), Consistency (90%)