/**
 * Tests for Story 95-3: Observation File Format and Writer
 *
 * RED state tests for tandem observation file creation and append.
 * These tests cover all acceptance criteria:
 *
 * AC1: File created at .session/{storyId}-tandem-{agent}.md
 * AC2: Header includes observer agent, persona, phase, start timestamp
 * AC3: Entry format — timestamp (HH:MM), trigger type, trigger detail, observation
 * AC4: Entries separated by --- horizontal rules
 * AC5: Entry-atomic appends — each write is a complete markdown entry
 * AC6: Valid markdown at all times, including after crash during write
 * AC7: Functions return result objects ({success, error?}) instead of throwing
 *
 * Run with: npm test
 */
export {};
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