{
  "conversationId": "ts-v4-test-1765386506-1765386509451",
  "metadata": {
    "agentId": "ts-v4-test-1765386506",
    "feature": "Date formatter function that formats Date objects as YYYY-MM-DD",
    "filePath": "/tmp/cerebras-test-ts-v4/formatter.ts",
    "contextFiles": [],
    "completedAt": "2025-12-10T17:08:42.686Z"
  },
  "conversation": [
    {
      "role": "system",
      "content": "You are a TDD expert. Follow Red-Green-Refactor strictly. Use Given/When/Then test structure. Generate ONLY code - no markdown code blocks, no explanations, just raw code."
    },
    {
      "role": "user",
      "content": "# TDD Red Phase: Write Failing Tests\n\n## Feature\nDate formatter function that formats Date objects as YYYY-MM-DD\n\n## Target Implementation File\n/tmp/cerebras-test-ts-v4/formatter.ts\n\n## Context Files\n(none provided)\n\n## Requirements\n1. Write comprehensive tests using STANDARD test framework syntax (do NOT create custom helper functions):\n   - **TypeScript/JavaScript**: Use describe/it/expect blocks from vitest or jest\n     - Import framework: `import { describe, it, expect } from 'vitest';`\n     - Import functions: `import { functionName } from './filename';`\n     - Structure: `describe('feature', () => { it('should...', () => { expect(...).toBe(...) }) })`\n   - **Python**: Use pytest with def test_* functions\n     - Import: `from filename import ClassName` or `import pytest`\n     - Structure: `def test_feature(): assert value == expected`\n   - **Rust**: Use #[test] attribute or #[cfg(test)] module\n     - Import: `use super::*;` or `use crate::module::*;`\n     - Structure: `#[test] fn test_name() { assert_eq!(result, expected) }`\n2. Tests MUST fail initially (no implementation exists yet)\n3. Cover happy path AND edge cases\n4. Include setup/teardown if needed\n5. **CRITICAL: Include ALL necessary import statements at the top of the test file**\n6. **Do NOT create custom test helper functions (Given/When/Then helpers, etc.)**\n\nIMPORTANT: Generate ONLY the test file content. No markdown code blocks, no explanations, just raw code.",
      "timestamp": "2025-12-10T17:08:29.452Z"
    },
    {
      "role": "assistant",
      "content": "\nimport { describe, it, expect } from 'vitest';\nimport { formatDate } from './formatter';\n\ndescribe('formatDate', () => {\n  it('should format a valid date as YYYY-MM-DD', () => {\n    const date = new Date('2023-12-25T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-12-25');\n  });\n\n  it('should handle single digit months with leading zero', () => {\n    const date = new Date('2023-01-15T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-01-15');\n  });\n\n  it('should handle single digit days with leading zero', () => {\n    const date = new Date('2023-12-05T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-12-05');\n  });\n\n  it('should handle leap year dates', () => {\n    const date = new Date('2024-02-29T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2024-02-29');\n  });\n\n  it('should handle minimum valid date', () => {\n    const date = new Date('0001-01-01T00:00:00.000Z');\n    expect(formatDate(date)).toBe('0001-01-01');\n  });\n\n  it('should handle maximum reasonable date', () => {\n    const date = new Date('9999-12-31T00:00:00.000Z');\n    expect(formatDate(date)).toBe('9999-12-31');\n  });\n\n  it('should handle dates with time components', () => {\n    const date = new Date('2023-06-15T14:30:45.123Z');\n    expect(formatDate(date)).toBe('2023-06-15');\n  });\n\n  it('should handle dates in different timezones', () => {\n    const date = new Date('2023-06-15T23:59:59.999-05:00');\n    expect(formatDate(date)).toBe('2023-06-16');\n  });\n\n  it('should throw error for null input', () => {\n    expect(() => formatDate(null as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for undefined input', () => {\n    expect(() => formatDate(undefined as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for invalid date object', () => {\n    const invalidDate = new Date('invalid');\n    expect(() => formatDate(invalidDate)).toThrow('Invalid date');\n  });\n\n  it('should throw error for non-date object input', () => {\n    expect(() => formatDate('2023-12-25' as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for number input', () => {\n    expect(() => formatDate(1234567890 as any)).toThrow('Invalid date');\n  });\n\n  it('should handle date at epoch', () => {\n    const date = new Date(0);\n    expect(formatDate(date)).toBe('1970-01-01');\n  });\n\n  it('should handle negative timestamp dates', () => {\n    const date = new Date(-86400000);\n    expect(formatDate(date)).toBe('1969-12-31');\n  });\n});",
      "timestamp": "2025-12-10T17:08:30.909Z"
    },
    {
      "role": "user",
      "content": "# TDD Green Phase: Write Implementation\n\nThe tests you just wrote are now failing. Write the MINIMUM implementation to make them pass.\n\n## Test File Content\n```\nimport { describe, it, expect } from 'vitest';\nimport { formatDate } from './formatter';\n\ndescribe('formatDate', () => {\n  it('should format a valid date as YYYY-MM-DD', () => {\n    const date = new Date('2023-12-25T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-12-25');\n  });\n\n  it('should handle single digit months with leading zero', () => {\n    const date = new Date('2023-01-15T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-01-15');\n  });\n\n  it('should handle single digit days with leading zero', () => {\n    const date = new Date('2023-12-05T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-12-05');\n  });\n\n  it('should handle leap year dates', () => {\n    const date = new Date('2024-02-29T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2024-02-29');\n  });\n\n  it('should handle minimum valid date', () => {\n    const date = new Date('0001-01-01T00:00:00.000Z');\n    expect(formatDate(date)).toBe('0001-01-01');\n  });\n\n  it('should handle maximum reasonable date', () => {\n    const date = new Date('9999-12-31T00:00:00.000Z');\n    expect(formatDate(date)).toBe('9999-12-31');\n  });\n\n  it('should handle dates with time components', () => {\n    const date = new Date('2023-06-15T14:30:45.123Z');\n    expect(formatDate(date)).toBe('2023-06-15');\n  });\n\n  it('should handle dates in different timezones', () => {\n    const date = new Date('2023-06-15T23:59:59.999-05:00');\n    expect(formatDate(date)).toBe('2023-06-16');\n  });\n\n  it('should throw error for null input', () => {\n    expect(() => formatDate(null as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for undefined input', () => {\n    expect(() => formatDate(undefined as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for invalid date object', () => {\n    const invalidDate = new Date('invalid');\n    expect(() => formatDate(invalidDate)).toThrow('Invalid date');\n  });\n\n  it('should throw error for non-date object input', () => {\n    expect(() => formatDate('2023-12-25' as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for number input', () => {\n    expect(() => formatDate(1234567890 as any)).toThrow('Invalid date');\n  });\n\n  it('should handle date at epoch', () => {\n    const date = new Date(0);\n    expect(formatDate(date)).toBe('1970-01-01');\n  });\n\n  it('should handle negative timestamp dates', () => {\n    const date = new Date(-86400000);\n    expect(formatDate(date)).toBe('1969-12-31');\n  });\n});\n```\n\n## Target Implementation File\n/tmp/cerebras-test-ts-v4/formatter.ts\n\n## Requirements\n1. Implement ONLY what the tests require\n2. Don't add extra features (YAGNI)\n3. Make all tests pass\n4. Follow existing code patterns from context\n5. **CRITICAL: Export all functions/classes that the tests import**\n6. **For TypeScript/JavaScript: use `export function name()` or `export { name }`**\n7. **For Python: functions are exported by default**\n8. **For Rust: use `pub fn name()` for public functions**\n\nIMPORTANT: Generate ONLY the implementation file content. No markdown code blocks, no explanations, just raw code.",
      "timestamp": "2025-12-10T17:08:30.909Z"
    },
    {
      "role": "assistant",
      "content": "\nexport function formatDate(date: Date): string {\n  if (!(date instanceof Date) || isNaN(date.getTime())) {\n    throw new Error('Invalid date');\n  }\n\n  const year = date.getFullYear();\n  const month = String(date.getMonth() + 1).padStart(2, '0');\n  const day = String(date.getDate()).padStart(2, '0');\n\n  return `${year}-${month}-${day}`;\n}",
      "timestamp": "2025-12-10T17:08:31.176Z"
    },
    {
      "role": "user",
      "content": "# Fix Required - Tests Still Failing (Iteration 1)\n\n## Error Output\n```\n\u001b[31mNo test files found, exiting with code 1\n\u001b[39m\n\u001b[2mfilter: \u001b[22m\u001b[33m/tmp/cerebras-test-ts-v4/formatter.test.ts\u001b[39m\n\u001b[2minclude: \u001b[22m\u001b[33m**/*.{test,spec}.?(c|m)[jt]s?(x)\u001b[39m\n\u001b[2mexclude:  \u001b[22m\u001b[33m**/node_modules/**\u001b[2m, \u001b[22m**/.git/**\u001b[39m\n\n\n```\n\n## Target File to Fix\nTEST file: /tmp/cerebras-test-ts-v4/formatter.test.ts\n\n## Instructions\n1. Carefully analyze the error output above\n2. Review your previous test in the conversation\n3. Identify what's wrong (logic error, **missing imports**, missing edge case, incorrect behavior)\n4. **CRITICAL: If error says \"X is not defined\" or \"cannot find name X\":**\n   - Check if X exists in the implementation file\n   - If YES: Add import statement to the TEST file (not implementation)\n   - Example: `import { X } from './filename';`\n5. Fix ONLY the specific issue in the TEST file\n6. Preserve all working functionality\n\nIMPORTANT: Generate the COMPLETE fixed TEST file content for formatter.test.ts. No markdown code blocks, no explanations, just raw code.",
      "timestamp": "2025-12-10T17:08:34.470Z"
    },
    {
      "role": "assistant",
      "content": "\nimport { describe, it, expect } from 'vitest';\nimport { formatDate } from './formatter';\n\ndescribe('formatDate', () => {\n  it('should format a valid date as YYYY-MM-DD', () => {\n    const date = new Date('2023-12-25T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-12-25');\n  });\n\n  it('should handle single digit months with leading zero', () => {\n    const date = new Date('2023-01-15T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-01-15');\n  });\n\n  it('should handle single digit days with leading zero', () => {\n    const date = new Date('2023-12-05T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-12-05');\n  });\n\n  it('should handle leap year dates', () => {\n    const date = new Date('2024-02-29T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2024-02-29');\n  });\n\n  it('should handle minimum valid date', () => {\n    const date = new Date('0001-01-01T00:00:00.000Z');\n    expect(formatDate(date)).toBe('0001-01-01');\n  });\n\n  it('should handle maximum reasonable date', () => {\n    const date = new Date('9999-12-31T00:00:00.000Z');\n    expect(formatDate(date)).toBe('9999-12-31');\n  });\n\n  it('should handle dates with time components', () => {\n    const date = new Date('2023-06-15T14:30:45.123Z');\n    expect(formatDate(date)).toBe('2023-06-15');\n  });\n\n  it('should handle dates in different timezones', () => {\n    const date = new Date('2023-06-15T23:59:59.999-05:00');\n    expect(formatDate(date)).toBe('2023-06-16');\n  });\n\n  it('should throw error for null input', () => {\n    expect(() => formatDate(null as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for undefined input', () => {\n    expect(() => formatDate(undefined as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for invalid date object', () => {\n    const invalidDate = new Date('invalid');\n    expect(() => formatDate(invalidDate)).toThrow('Invalid date');\n  });\n\n  it('should throw error for non-date object input', () => {\n    expect(() => formatDate('2023-12-25' as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for number input', () => {\n    expect(() => formatDate(1234567890 as any)).toThrow('Invalid date');\n  });\n\n  it('should handle date at epoch', () => {\n    const date = new Date(0);\n    expect(formatDate(date)).toBe('1970-01-01');\n  });\n\n  it('should handle negative timestamp dates', () => {\n    const date = new Date(-86400000);\n    expect(formatDate(date)).toBe('1969-12-31');\n  });\n});",
      "timestamp": "2025-12-10T17:08:35.035Z"
    },
    {
      "role": "user",
      "content": "# Fix Required - Tests Still Failing (Iteration 2)\n\n## Error Output\n```\n\u001b[31mNo test files found, exiting with code 1\n\u001b[39m\n\u001b[2mfilter: \u001b[22m\u001b[33m/tmp/cerebras-test-ts-v4/formatter.test.ts\u001b[39m\n\u001b[2minclude: \u001b[22m\u001b[33m**/*.{test,spec}.?(c|m)[jt]s?(x)\u001b[39m\n\u001b[2mexclude:  \u001b[22m\u001b[33m**/node_modules/**\u001b[2m, \u001b[22m**/.git/**\u001b[39m\n\n\n```\n\n## Target File to Fix\nTEST file: /tmp/cerebras-test-ts-v4/formatter.test.ts\n\n## Instructions\n1. Carefully analyze the error output above\n2. Review your previous test in the conversation\n3. Identify what's wrong (logic error, **missing imports**, missing edge case, incorrect behavior)\n4. **CRITICAL: If error says \"X is not defined\" or \"cannot find name X\":**\n   - Check if X exists in the implementation file\n   - If YES: Add import statement to the TEST file (not implementation)\n   - Example: `import { X } from './filename';`\n5. Fix ONLY the specific issue in the TEST file\n6. Preserve all working functionality\n\nIMPORTANT: Generate the COMPLETE fixed TEST file content for formatter.test.ts. No markdown code blocks, no explanations, just raw code.",
      "timestamp": "2025-12-10T17:08:38.321Z"
    },
    {
      "role": "assistant",
      "content": "\nimport { describe, it, expect } from 'vitest';\nimport { formatDate } from './formatter';\n\ndescribe('formatDate', () => {\n  it('should format a valid date as YYYY-MM-DD', () => {\n    const date = new Date('2023-12-25T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-12-25');\n  });\n\n  it('should handle single digit months with leading zero', () => {\n    const date = new Date('2023-01-15T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-01-15');\n  });\n\n  it('should handle single digit days with leading zero', () => {\n    const date = new Date('2023-12-05T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-12-05');\n  });\n\n  it('should handle leap year dates', () => {\n    const date = new Date('2024-02-29T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2024-02-29');\n  });\n\n  it('should handle minimum valid date', () => {\n    const date = new Date('0001-01-01T00:00:00.000Z');\n    expect(formatDate(date)).toBe('0001-01-01');\n  });\n\n  it('should handle maximum reasonable date', () => {\n    const date = new Date('9999-12-31T00:00:00.000Z');\n    expect(formatDate(date)).toBe('9999-12-31');\n  });\n\n  it('should handle dates with time components', () => {\n    const date = new Date('2023-06-15T14:30:45.123Z');\n    expect(formatDate(date)).toBe('2023-06-15');\n  });\n\n  it('should handle dates in different timezones', () => {\n    const date = new Date('2023-06-15T23:59:59.999-05:00');\n    expect(formatDate(date)).toBe('2023-06-16');\n  });\n\n  it('should throw error for null input', () => {\n    expect(() => formatDate(null as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for undefined input', () => {\n    expect(() => formatDate(undefined as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for invalid date object', () => {\n    const invalidDate = new Date('invalid');\n    expect(() => formatDate(invalidDate)).toThrow('Invalid date');\n  });\n\n  it('should throw error for non-date object input', () => {\n    expect(() => formatDate('2023-12-25' as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for number input', () => {\n    expect(() => formatDate(1234567890 as any)).toThrow('Invalid date');\n  });\n\n  it('should handle date at epoch', () => {\n    const date = new Date(0);\n    expect(formatDate(date)).toBe('1970-01-01');\n  });\n\n  it('should handle negative timestamp dates', () => {\n    const date = new Date(-86400000);\n    expect(formatDate(date)).toBe('1969-12-31');\n  });\n});",
      "timestamp": "2025-12-10T17:08:38.750Z"
    },
    {
      "role": "user",
      "content": "# Fix Required - Tests Still Failing (Iteration 3)\n\n## Error Output\n```\n\u001b[31mNo test files found, exiting with code 1\n\u001b[39m\n\u001b[2mfilter: \u001b[22m\u001b[33m/tmp/cerebras-test-ts-v4/formatter.test.ts\u001b[39m\n\u001b[2minclude: \u001b[22m\u001b[33m**/*.{test,spec}.?(c|m)[jt]s?(x)\u001b[39m\n\u001b[2mexclude:  \u001b[22m\u001b[33m**/node_modules/**\u001b[2m, \u001b[22m**/.git/**\u001b[39m\n\n\n```\n\n## Target File to Fix\nTEST file: /tmp/cerebras-test-ts-v4/formatter.test.ts\n\n## Instructions\n1. Carefully analyze the error output above\n2. Review your previous test in the conversation\n3. Identify what's wrong (logic error, **missing imports**, missing edge case, incorrect behavior)\n4. **CRITICAL: If error says \"X is not defined\" or \"cannot find name X\":**\n   - Check if X exists in the implementation file\n   - If YES: Add import statement to the TEST file (not implementation)\n   - Example: `import { X } from './filename';`\n5. Fix ONLY the specific issue in the TEST file\n6. Preserve all working functionality\n\nIMPORTANT: Generate the COMPLETE fixed TEST file content for formatter.test.ts. No markdown code blocks, no explanations, just raw code.",
      "timestamp": "2025-12-10T17:08:42.146Z"
    },
    {
      "role": "assistant",
      "content": "\nimport { describe, it, expect } from 'vitest';\nimport { formatDate } from './formatter';\n\ndescribe('formatDate', () => {\n  it('should format a valid date as YYYY-MM-DD', () => {\n    const date = new Date('2023-12-25T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-12-25');\n  });\n\n  it('should handle single digit months with leading zero', () => {\n    const date = new Date('2023-01-15T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-01-15');\n  });\n\n  it('should handle single digit days with leading zero', () => {\n    const date = new Date('2023-12-05T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2023-12-05');\n  });\n\n  it('should handle leap year dates', () => {\n    const date = new Date('2024-02-29T00:00:00.000Z');\n    expect(formatDate(date)).toBe('2024-02-29');\n  });\n\n  it('should handle minimum valid date', () => {\n    const date = new Date('0001-01-01T00:00:00.000Z');\n    expect(formatDate(date)).toBe('0001-01-01');\n  });\n\n  it('should handle maximum reasonable date', () => {\n    const date = new Date('9999-12-31T00:00:00.000Z');\n    expect(formatDate(date)).toBe('9999-12-31');\n  });\n\n  it('should handle dates with time components', () => {\n    const date = new Date('2023-06-15T14:30:45.123Z');\n    expect(formatDate(date)).toBe('2023-06-15');\n  });\n\n  it('should handle dates in different timezones', () => {\n    const date = new Date('2023-06-15T23:59:59.999-05:00');\n    expect(formatDate(date)).toBe('2023-06-16');\n  });\n\n  it('should throw error for null input', () => {\n    expect(() => formatDate(null as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for undefined input', () => {\n    expect(() => formatDate(undefined as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for invalid date object', () => {\n    const invalidDate = new Date('invalid');\n    expect(() => formatDate(invalidDate)).toThrow('Invalid date');\n  });\n\n  it('should throw error for non-date object input', () => {\n    expect(() => formatDate('2023-12-25' as any)).toThrow('Invalid date');\n  });\n\n  it('should throw error for number input', () => {\n    expect(() => formatDate(1234567890 as any)).toThrow('Invalid date');\n  });\n\n  it('should handle date at epoch', () => {\n    const date = new Date(0);\n    expect(formatDate(date)).toBe('1970-01-01');\n  });\n\n  it('should handle negative timestamp dates', () => {\n    const date = new Date(-86400000);\n    expect(formatDate(date)).toBe('1969-12-31');\n  });\n});",
      "timestamp": "2025-12-10T17:08:42.684Z"
    }
  ]
}