{
  "started_at": "2026-02-22T14:22:41.526745",
  "completed_at": "2026-02-22T14:33:34.291499",
  "runs": [
    {
      "agent": "harness",
      "model_alias": "opus",
      "task_id": "hb-multi-file-01",
      "task_category": "multi_file",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 18.2,
      "error": "",
      "output": "\n\nI'll start by finding all occurrences of `calculate_total` across the project.Found all occurrences across 4 files. Let me read each file to see the full context, then apply the rename.Now I'll rename `calculate_total` to `compute_total` in all 4 files simultaneously:Let me verify no references to the old name remain:All done. Here's a summary of the changes across **4 files** (7 replacements total):\n\n| File | Changes |\n|---|---|\n| `src/calc.py` | Function definition renamed: `def compute_total(items):` |\n| `src/api.py` | Import + call site updated to `compute_total` |\n| `src/views.py` | Import + call site updated to `compute_total` |\n| `tests/test_calc.py` | Import + assertion call updated to `compute_total` |\n\nNo remaining references to `calculate_total` exist in the project.\n[Tool: Grep] /calculate_total/\n[Result] /private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/T/harness-bench-ya49x533/harness/opus/hb-multi-file-01/tests/test_calc.py:1: from src.calc import calculate_total\n/private/var/folders/y0/_brl8vt...\n\n[Tool: Read] src/calc.py\n\n[Tool: Read] src/api.py\n\n[Tool: Read] src/views.py\n\n[Tool: Read] tests/test_calc.py\n\n[Tool: Edit] src/calc.py\n[Result] Made 1 replacement(s) in /private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/T/harness-bench-ya49x533/harness/opus/hb-multi-file-01/src/calc.py\n--- context ---\ndef compute_total(items):\n    return ...\n\n[Tool: Edit] src/api.py\n[Result] Made 2 replacement(s) in /private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/T/harness-bench-ya49x533/harness/opus/hb-multi-file-01/src/api.py\n--- context ---\nfrom src.calc import compute_total\n\nde...\n\n[Tool: Edit] src/views.py\n[Result] Made 2 replacement(s) in /private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/T/harness-bench-ya49x533/harness/opus/hb-multi-file-01/src/views.py\n--- context ---\nfrom src.calc import compute_total\n\n...\n\n[Tool: Edit] tests/test_calc.py\n[Result] Made 2 replacement(s) in /private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/T/harness-bench"
    },
    {
      "agent": "harness",
      "model_alias": "opus",
      "task_id": "hb-recovery-01",
      "task_category": "recovery",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 21.0,
      "error": "",
      "output": "\n\nLet me start by reading the file to identify the syntax error.The syntax error is on line 2: the `print(` call is missing its closing parenthesis `)`.Now let me verify it runs correctly:**Fix:** Added the missing closing parenthesis `)` on line 2. The `print(` call was missing its closing paren, which caused a `SyntaxError`. The script now runs successfully and outputs `Hello, World!`.\n[Tool: Read] main.py\n\n[Tool: Edit] main.py\n[Result] Made 1 replacement(s) in /private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/T/harness-bench-ya49x533/harness/opus/hb-recovery-01/main.py\n--- context ---\ndef greet(name):\n    print(f'Hello, {name}!...\n\n[Tool: Bash] $ cd /private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/T/harness-bench-ya49x533/harness/opus/hb-recovery-01 && python main.py\n\nSession: ea94999362fd | Turns: 4 | Tools: 3 | Tokens: 10,378\n"
    },
    {
      "agent": "harness",
      "model_alias": "opus",
      "task_id": "hb-tool-efficiency-01",
      "task_category": "tools",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 5.9,
      "error": "",
      "output": "Found **3 Python files** containing the word `TODO`:\n\n| File | Line | Content |\n|------|------|---------|\n| `src/a.py` | 1 | `# TODO: implement` |\n| `src/c.py` | 1 | `# TODO: refactor` |\n| `src/d.py` | 1 | `def d(): pass  # TODO later` |\n[Tool: Grep] /TODO/\n[Result] /private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/T/harness-bench-ya49x533/harness/opus/hb-tool-efficiency-01/src/a.py:1: # TODO: implement\n/private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/...\n\nSession: 3ff0869c615e | Turns: 2 | Tools: 1 | Tokens: 4,961\n"
    },
    {
      "agent": "harness",
      "model_alias": "opus",
      "task_id": "hb-context-01",
      "task_category": "context",
      "task_difficulty": "hard",
      "resolved": true,
      "duration_seconds": 21.6,
      "error": "",
      "output": "\n\nLet me start by reading the config.py file to understand the settings available.Now I have the configuration. It defines PostgreSQL connection settings: host, port, database name, and user. Let me create the `database.py` module.Let me verify the module loads correctly (syntax/import check):Everything works. Here's a summary of the `database.py` module:\n\n### `Database` class\n\n**Constructor** \u2014 Defaults all parameters from `config.py` (`DB_HOST`, `DB_PORT`, `DB_NAME`, `DB_USER`), but allows overrides.\n\n**Key attributes & properties:**\n| Member | Description |\n|---|---|\n| `connection_string` | Builds a `postgresql://` URI from the settings |\n| `is_connected` | `True` if a live connection exists |\n\n**Methods:**\n| Method | Description |\n|---|---|\n| `connect()` | Opens a `psycopg2` connection |\n| `disconnect()` | Closes the connection |\n| `execute(query, params)` | Runs a query and returns results via `fetchall()` |\n\n**Context manager** (`with Database() as db:`) \u2014 Automatically connects on entry, commits on clean exit, rolls back on exception, and disconnects on exit.\n[Tool: Read] config.py\n\n[Tool: Glob] **/*.py\n\n[Tool: Write] database.py\n\n[Tool: Bash] $ cd /private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/T/harness-bench-ya49x533/harness/opus/hb-context-01 && python3 -c \"\nfrom database import Database\ndb = Database()\nprint(repr(db))\nprint('Connection string:', db.connection_string)\nprint('Is connected:', db.is_connected)\n\"\n\nSession: e0520f6aa5cf | Turns: 4 | Tools: 4 | Tokens: 12,816\n"
    },
    {
      "agent": "harness",
      "model_alias": "opus",
      "task_id": "hb-create-01",
      "task_category": "creation",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 6.4,
      "error": "",
      "output": "The file `utils.py` has been created with the `is_palindrome(s)` function. Here's how it works:\n\n- **Converts** the input string to lowercase with `s.lower()` for case-insensitive comparison.\n- **Compares** the string to its reverse (`s[::-1]`), returning `True` if they match.\n\n**Examples:**\n```python\nis_palindrome(\"Racecar\")  # True\nis_palindrome(\"hello\")    # False\nis_palindrome(\"Madam\")    # True\n```\n[Tool: Write] utils.py\n\nSession: 10d548c39d5b | Turns: 2 | Tools: 1 | Tokens: 4,989\n"
    },
    {
      "agent": "harness",
      "model_alias": "opus",
      "task_id": "hb-bugfix-01",
      "task_category": "bugfix",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 21.2,
      "error": "",
      "output": "\n\nLet me start by finding and reading the relevant files.Now I can see the issue. The `divide` function does `a / b` without handling the `b == 0` case. The test expects `None` to be returned when dividing by zero. Let me fix it:Now let's run the test to verify:All tests pass. Here's what I did:\n\n**Problem:** `divide(a, b)` raised a `ZeroDivisionError` when `b` was `0`.\n\n**Fix:** Added a guard clause in `math_utils.py` to check if `b == 0` and return `None` instead of attempting the division:\n\n```python\ndef divide(a, b):\n    if b == 0:\n        return None\n    return a / b\n```\n\nAll three test cases pass:\n- `divide(10, 2) == 5` \u2713\n- `divide(0, 1) == 0` \u2713\n- `divide(10, 0) is None` \u2713\n[Tool: Glob] **/math_utils.py\n\n[Tool: Grep] /def divide/\n\n[Tool: Read] math_utils.py\n\n[Tool: Glob] **/test_math_utils.py\n\n[Tool: Grep] /divide/\n[Result] /private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/T/harness-bench-ya49x533/harness/opus/hb-bugfix-01/test_math.py:1: from math_utils import divide\n/private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc...\n\n[Tool: Read] test_math.py\n\n[Tool: Edit] math_utils.py\n[Result] Made 1 replacement(s) in /private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/T/harness-bench-ya49x533/harness/opus/hb-bugfix-01/math_utils.py\n--- context ---\ndef divide(a, b):\n    if b == 0:\n      ...\n\n[Tool: Bash] $ cd /private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/T/harness-bench-ya49x533/harness/opus/hb-bugfix-01 && python -m pytest test_math.py -v\n[Result] ============================= test session starts ==============================\nplatform darwin -- Python 3.13.5, pytest-9.0.2, pluggy-1.6.0 -- /Users/huetuanthi/dev/agents/harness/.venv/bin/python\nc...\n\nSession: ec8d0af5f6a9 | Turns: 7 | Tools: 8 | Tokens: 23,138\n"
    },
    {
      "agent": "harness",
      "model_alias": "opus",
      "task_id": "hb-analyze-01",
      "task_category": "analysis",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 5.9,
      "error": "",
      "output": "Here are all the imported modules in `app.py`:\n\n| Line | Import Statement | Module |\n|------|-----------------|--------|\n| 1 | `import os` | `os` |\n| 2 | `import sys` | `sys` |\n| 3 | `from pathlib import Path` | `pathlib` (specifically `Path`) |\n| 4 | `from collections import defaultdict` | `collections` (specifically `defaultdict`) |\n| 5 | `import json` | `json` |\n\n**Summary:** There are **5** imported modules \u2014 all from the Python standard library: `os`, `sys`, `pathlib`, `collections`, and `json`.\n[Tool: Read] app.py\n\nSession: fa388472e094 | Turns: 2 | Tools: 1 | Tokens: 4,811\n"
    },
    {
      "agent": "harness",
      "model_alias": "opus",
      "task_id": "hb-refactor-01",
      "task_category": "refactor",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 14.8,
      "error": "",
      "output": "\n\nLet me start by reading the current file to understand the duplicated error handling pattern.The pattern is clear \u2014 every function wraps its body in `try/except Exception`, prints the error, and returns `None`. I'll extract that into a `handle_errors` decorator.Let me verify the refactored code works correctly:Everything works. Here's a summary of the changes:\n\n1. **Added a `handle_errors` decorator** that wraps any function in the common `try/except Exception` pattern \u2014 catching exceptions, printing `Error: {e}`, and returning `None`.\n2. **Stripped the duplicated `try/except` blocks** from `get_user` and `get_item`, leaving only their core logic.\n3. **Applied `@handle_errors`** to both functions to preserve the original behavior.\n4. Used `functools.wraps` so the decorated functions retain their original `__name__`, `__doc__`, and other metadata.\n[Tool: Read] handlers.py\n[Result]      1\tdef get_user(user_id):\n     2\t    try:\n     3\t        return {'id': user_id, 'name': 'Alice'}\n     4\t    except Exception as e:\n     5\t        print(f'Error: {e}')\n     6\t        return None\n  ...\n\n[Tool: Write] handlers.py\n\n[Tool: Bash] $ cd /private/var/folders/y0/_brl8vt509l1ctwzm8pw1_qc0000gn/T/harness-bench-ya49x533/harness/opus/hb-refactor-01 && python3 -c \"\nfrom handlers import get_user, get_item\n\n# Test normal behavior\nprint(get_user(1))\nprint(get_item(42))\n\n# Verify decorator preserves function metadata\nprint(f'get_user.__name__ = {get_user.__name__}')\nprint(f'get_item.__name__ = {get_item.__name__}')\n\"\n\n\nSession: 089ba15797c9 | Turns: 4 | Tools: 3 | Tokens: 11,380\n"
    },
    {
      "agent": "claude-code",
      "model_alias": "opus",
      "task_id": "hb-multi-file-01",
      "task_category": "multi_file",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 32.6,
      "error": "",
      "output": "Done. Renamed `calculate_total` to `compute_total` across all 4 files:\n\n- **`src/calc.py:1`** \u2014 function definition\n- **`src/views.py:1,4`** \u2014 import and call\n- **`src/api.py:1,4`** \u2014 import and call\n- **`tests/test_calc.py:1,4`** \u2014 import and assertion\n"
    },
    {
      "agent": "claude-code",
      "model_alias": "opus",
      "task_id": "hb-recovery-01",
      "task_category": "recovery",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 17.3,
      "error": "",
      "output": "Fixed. The `print()` call on line 2 was missing a closing parenthesis. It now runs correctly and outputs `Hello, World!`.\n"
    },
    {
      "agent": "claude-code",
      "model_alias": "opus",
      "task_id": "hb-tool-efficiency-01",
      "task_category": "tools",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 11.9,
      "error": "",
      "output": "Found 3 Python files containing 'TODO':\n\n1. `src/a.py`\n2. `src/c.py`\n3. `src/d.py`\n\nWould you like me to show the specific TODO comments in any of these files?\n"
    },
    {
      "agent": "claude-code",
      "model_alias": "opus",
      "task_id": "hb-context-01",
      "task_category": "context",
      "task_difficulty": "hard",
      "resolved": false,
      "duration_seconds": 19.1,
      "error": "",
      "output": "Created `database.py` with a `Database` class that:\n\n- **Imports** all four settings (`DB_HOST`, `DB_PORT`, `DB_NAME`, `DB_USER`) from `config.py`\n- **`connect()`** \u2014 opens a PostgreSQL connection using `psycopg2` with the configured host, port, dbname, and user\n- **`disconnect()`** \u2014 closes the connection and resets it to `None`\n- **`execute()`** \u2014 runs a parameterized query and returns the cursor\n- **`fetchone()` / `fetchall()`** \u2014 convenience methods for querying rows\n- **`commit()` / `rollback()`** \u2014 transaction control\n"
    },
    {
      "agent": "claude-code",
      "model_alias": "opus",
      "task_id": "hb-create-01",
      "task_category": "creation",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 10.8,
      "error": "",
      "output": "Created `utils.py` with the `is_palindrome(s)` function. It converts the string to lowercase and checks if it reads the same forwards and backwards.\n"
    },
    {
      "agent": "claude-code",
      "model_alias": "opus",
      "task_id": "hb-bugfix-01",
      "task_category": "bugfix",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 23.6,
      "error": "",
      "output": "Fixed. The `divide` function in `math_utils.py` now checks for `b == 0` and returns `None` instead of raising a `ZeroDivisionError`. The test passes, confirming all three cases work: normal division, zero numerator, and zero denominator.\n"
    },
    {
      "agent": "claude-code",
      "model_alias": "opus",
      "task_id": "hb-analyze-01",
      "task_category": "analysis",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 12.3,
      "error": "",
      "output": "Here are all the imported modules in `app.py`:\n\n1. **`os`** \u2014 standard import\n2. **`sys`** \u2014 standard import\n3. **`Path`** from **`pathlib`** \u2014 specific class import\n4. **`defaultdict`** from **`collections`** \u2014 specific class import\n5. **`json`** \u2014 standard import\n\nAll five are Python standard library modules.\n"
    },
    {
      "agent": "claude-code",
      "model_alias": "opus",
      "task_id": "hb-refactor-01",
      "task_category": "refactor",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 16.2,
      "error": "",
      "output": "The duplicated `try/except` blocks have been extracted into a `handle_errors` decorator that:\n\n- Catches `Exception`, prints the error, and returns `None` \u2014 matching the original behavior\n- Uses `functools.wraps` to preserve each function's name and docstring\n- Accepts `*args, **kwargs` so it works with any function signature\n\nBoth `get_user` and `get_item` now contain only their core logic.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "opus",
      "task_id": "hb-multi-file-01",
      "task_category": "multi_file",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 18.0,
      "error": "",
      "output": "Done! I've successfully renamed `calculate_total()` to `compute_total()` in the function definition and updated all imports and function calls across all 4 files: `src/calc.py`, `src/api.py`, `src/views.py`, and `tests/test_calc.py`.\n2026/02/22 14:27:00 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:27:00 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "opus",
      "task_id": "hb-recovery-01",
      "task_category": "recovery",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 13.0,
      "error": "",
      "output": "Fixed the missing closing parenthesis on line 2. The script now runs successfully and outputs \"Hello, World!\".\n2026/02/22 14:27:18 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:27:18 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "opus",
      "task_id": "hb-tool-efficiency-01",
      "task_category": "tools",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 7.0,
      "error": "",
      "output": "Found TODO comments in 3 Python files:\n- `src/a.py`: \"TODO: implement\"\n- `src/c.py`: \"TODO: refactor\" \n- `src/d.py`: \"TODO later\"\n2026/02/22 14:27:31 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:27:31 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "opus",
      "task_id": "hb-context-01",
      "task_category": "context",
      "task_difficulty": "hard",
      "resolved": false,
      "duration_seconds": 12.4,
      "error": "",
      "output": "Created database.py with a Database class that imports and uses the PostgreSQL configuration from config.py. The class includes connection management, query execution, and context manager support.\n2026/02/22 14:27:38 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:27:38 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "opus",
      "task_id": "hb-create-01",
      "task_category": "creation",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 5.2,
      "error": "",
      "output": "Created `utils.py` with the `is_palindrome` function.\n2026/02/22 14:27:51 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:27:51 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "opus",
      "task_id": "hb-bugfix-01",
      "task_category": "bugfix",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 11.5,
      "error": "",
      "output": "Fixed! The `divide` function now returns `None` when dividing by zero, and all tests pass.\n2026/02/22 14:27:56 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:27:56 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "opus",
      "task_id": "hb-analyze-01",
      "task_category": "analysis",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 5.0,
      "error": "",
      "output": "The imported modules are:\n- os\n- sys\n- pathlib.Path\n- collections.defaultdict\n- json\n2026/02/22 14:28:08 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:28:08 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "opus",
      "task_id": "hb-refactor-01",
      "task_category": "refactor",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 11.6,
      "error": "",
      "output": "The duplicated error handling has been extracted into a `handle_errors` decorator. The decorator wraps functions with the same try/except pattern, eliminating code duplication while maintaining the same functionality.\n2026/02/22 14:28:13 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:28:13 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "opus",
      "task_id": "hb-multi-file-01",
      "task_category": "multi_file",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 16.6,
      "error": "",
      "output": "All done. Here's a summary of the changes:\n\n- **`src/calc.py`** \u2014 Renamed the function definition `calculate_total` \u2192 `compute_total`\n- **`src/api.py`** \u2014 Updated import and call site\n- **`src/views.py`** \u2014 Updated import and call site\n- **`tests/test_calc.py`** \u2014 Updated import and call site\n\nAll 4 files updated across the definition, imports, and call sites.\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "opus",
      "task_id": "hb-recovery-01",
      "task_category": "recovery",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 10.2,
      "error": "",
      "output": "**Fix:** Added the missing closing `)` on line 2 of `main.py`. The `print(f'Hello, {name}!'` was missing its closing parenthesis. The script now runs successfully and outputs `Hello, World!`.\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "opus",
      "task_id": "hb-tool-efficiency-01",
      "task_category": "tools",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 5.0,
      "error": "",
      "output": "Found 3 Python files containing 'TODO':\n\n1. `./src/a.py`\n2. `./src/d.py`\n3. `./src/c.py`\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "opus",
      "task_id": "hb-context-01",
      "task_category": "context",
      "task_difficulty": "hard",
      "resolved": false,
      "duration_seconds": 12.6,
      "error": "",
      "output": "Created `database.py` with a `Database` class that uses all four settings from `config.py`:\n\n- **`DB_HOST`** \u2192 `localhost`\n- **`DB_PORT`** \u2192 `5432`\n- **`DB_NAME`** \u2192 `myapp`\n- **`DB_USER`** \u2192 `admin`\n\nThe class provides:\n\n- **`connect()`** \u2014 Establishes a PostgreSQL connection (reuses existing if open)\n- **`disconnect()`** \u2014 Closes the connection\n- **`execute(query, params)`** \u2014 Runs a query, returns rows for SELECT or commits for write operations\n- **Context manager support** (`with Database() as db:`) for automatic connect/disconnect\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "opus",
      "task_id": "hb-create-01",
      "task_category": "creation",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 6.3,
      "error": "",
      "output": "Created `utils.py` with the `is_palindrome(s)` function. It:\n\n1. Converts the string to lowercase for case-insensitive comparison\n2. Checks if the string equals its reverse (`s[::-1]`)\n3. Returns `True` if it's a palindrome, `False` otherwise\n\nExamples:\n- `is_palindrome(\"Racecar\")` \u2192 `True`\n- `is_palindrome(\"hello\")` \u2192 `False`\n- `is_palindrome(\"Level\")` \u2192 `True`\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "opus",
      "task_id": "hb-bugfix-01",
      "task_category": "bugfix",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 11.7,
      "error": "",
      "output": "Fixed `math_utils.py` by adding a guard for division by zero. The `divide` function now returns `None` when `b == 0` instead of raising a `ZeroDivisionError`. The test passes successfully.\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "opus",
      "task_id": "hb-analyze-01",
      "task_category": "analysis",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 6.4,
      "error": "",
      "output": "Here are all the imported modules in `app.py`:\n\n1. **`os`** \u2014 standard import\n2. **`sys`** \u2014 standard import\n3. **`Path`** \u2014 from `pathlib`\n4. **`defaultdict`** \u2014 from `collections`\n5. **`json`** \u2014 standard import\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "opus",
      "task_id": "hb-refactor-01",
      "task_category": "refactor",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 12.3,
      "error": "",
      "output": "Here's what I did:\n\n1. **Created a `handle_errors` decorator** that wraps any function in the common `try/except` pattern \u2014 catching `Exception`, printing the error, and returning `None`.\n2. **Used `functools.wraps`** to preserve the original function's name and docstring.\n3. **Applied `@handle_errors`** to both `get_user` and `get_item`, removing the duplicated try/except blocks from each function body.\n"
    },
    {
      "agent": "harness",
      "model_alias": "gpt52",
      "task_id": "hb-multi-file-01",
      "task_category": "multi_file",
      "task_difficulty": "medium",
      "resolved": false,
      "duration_seconds": 0.4,
      "error": "",
      "output": "/Users/huetuanthi/dev/agents/harness/src/harness/core/loop.py:122: RuntimeWarning: coroutine 'OpenAIProvider.chat_completion_stream' was never awaited\n  async for event in self._provider.chat_completion_stream(\nRuntimeWarning: Enable tracemalloc to get the object allocation traceback\nTraceback (most recent call last):\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/bin/harness\", line 10, in <module>\n    sys.exit(cli())\n             ~~~^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1485, in __call__\n    return self.main(*args, **kwargs)\n           ~~~~~~~~~^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1406, in main\n    rv = self.invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1851, in invoke\n    rv = super().invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1269, in invoke\n    return ctx.invoke(self.callback, **ctx.params)\n           ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 824, in invoke\n    return callback(*args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/decorators.py\", line 34, in new_func\n    return f(get_current_context(), *args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/src/harness/cli/main.py\", line 126, in cli\n    asyncio.run(_run_agent(\n    ~~~~~~~~~~~^^^^^^^^^^^^\n        prompt_text,\n        ^^^^^^^^^^^^\n    ...<9 lines>...\n        interactive=interactive,\n        ^^^^^^^^^^^^^^^^^^^^^^^^\n    ))\n    ^^\n  File \"/Users/huetuanthi/.local/share/uv/python/cpython-3.13.5-macos-aarch64-none/lib/python3.13/asyncio/runners.py\", line 195, in run\n    return runner.run(main)\n           ~~~~~~~~~~^^^^^^\n  File \"/Users/huetuanthi/.local/share/uv/pytho"
    },
    {
      "agent": "harness",
      "model_alias": "gpt52",
      "task_id": "hb-recovery-01",
      "task_category": "recovery",
      "task_difficulty": "medium",
      "resolved": false,
      "duration_seconds": 0.3,
      "error": "",
      "output": "/Users/huetuanthi/dev/agents/harness/src/harness/core/loop.py:122: RuntimeWarning: coroutine 'OpenAIProvider.chat_completion_stream' was never awaited\n  async for event in self._provider.chat_completion_stream(\nRuntimeWarning: Enable tracemalloc to get the object allocation traceback\nTraceback (most recent call last):\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/bin/harness\", line 10, in <module>\n    sys.exit(cli())\n             ~~~^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1485, in __call__\n    return self.main(*args, **kwargs)\n           ~~~~~~~~~^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1406, in main\n    rv = self.invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1851, in invoke\n    rv = super().invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1269, in invoke\n    return ctx.invoke(self.callback, **ctx.params)\n           ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 824, in invoke\n    return callback(*args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/decorators.py\", line 34, in new_func\n    return f(get_current_context(), *args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/src/harness/cli/main.py\", line 126, in cli\n    asyncio.run(_run_agent(\n    ~~~~~~~~~~~^^^^^^^^^^^^\n        prompt_text,\n        ^^^^^^^^^^^^\n    ...<9 lines>...\n        interactive=interactive,\n        ^^^^^^^^^^^^^^^^^^^^^^^^\n    ))\n    ^^\n  File \"/Users/huetuanthi/.local/share/uv/python/cpython-3.13.5-macos-aarch64-none/lib/python3.13/asyncio/runners.py\", line 195, in run\n    return runner.run(main)\n           ~~~~~~~~~~^^^^^^\n  File \"/Users/huetuanthi/.local/share/uv/pytho"
    },
    {
      "agent": "harness",
      "model_alias": "gpt52",
      "task_id": "hb-tool-efficiency-01",
      "task_category": "tools",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 0.3,
      "error": "",
      "output": "/Users/huetuanthi/dev/agents/harness/src/harness/core/loop.py:122: RuntimeWarning: coroutine 'OpenAIProvider.chat_completion_stream' was never awaited\n  async for event in self._provider.chat_completion_stream(\nRuntimeWarning: Enable tracemalloc to get the object allocation traceback\nTraceback (most recent call last):\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/bin/harness\", line 10, in <module>\n    sys.exit(cli())\n             ~~~^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1485, in __call__\n    return self.main(*args, **kwargs)\n           ~~~~~~~~~^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1406, in main\n    rv = self.invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1851, in invoke\n    rv = super().invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1269, in invoke\n    return ctx.invoke(self.callback, **ctx.params)\n           ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 824, in invoke\n    return callback(*args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/decorators.py\", line 34, in new_func\n    return f(get_current_context(), *args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/src/harness/cli/main.py\", line 126, in cli\n    asyncio.run(_run_agent(\n    ~~~~~~~~~~~^^^^^^^^^^^^\n        prompt_text,\n        ^^^^^^^^^^^^\n    ...<9 lines>...\n        interactive=interactive,\n        ^^^^^^^^^^^^^^^^^^^^^^^^\n    ))\n    ^^\n  File \"/Users/huetuanthi/.local/share/uv/python/cpython-3.13.5-macos-aarch64-none/lib/python3.13/asyncio/runners.py\", line 195, in run\n    return runner.run(main)\n           ~~~~~~~~~~^^^^^^\n  File \"/Users/huetuanthi/.local/share/uv/pytho"
    },
    {
      "agent": "harness",
      "model_alias": "gpt52",
      "task_id": "hb-context-01",
      "task_category": "context",
      "task_difficulty": "hard",
      "resolved": false,
      "duration_seconds": 0.3,
      "error": "",
      "output": "/Users/huetuanthi/dev/agents/harness/src/harness/core/loop.py:122: RuntimeWarning: coroutine 'OpenAIProvider.chat_completion_stream' was never awaited\n  async for event in self._provider.chat_completion_stream(\nRuntimeWarning: Enable tracemalloc to get the object allocation traceback\nTraceback (most recent call last):\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/bin/harness\", line 10, in <module>\n    sys.exit(cli())\n             ~~~^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1485, in __call__\n    return self.main(*args, **kwargs)\n           ~~~~~~~~~^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1406, in main\n    rv = self.invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1851, in invoke\n    rv = super().invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1269, in invoke\n    return ctx.invoke(self.callback, **ctx.params)\n           ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 824, in invoke\n    return callback(*args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/decorators.py\", line 34, in new_func\n    return f(get_current_context(), *args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/src/harness/cli/main.py\", line 126, in cli\n    asyncio.run(_run_agent(\n    ~~~~~~~~~~~^^^^^^^^^^^^\n        prompt_text,\n        ^^^^^^^^^^^^\n    ...<9 lines>...\n        interactive=interactive,\n        ^^^^^^^^^^^^^^^^^^^^^^^^\n    ))\n    ^^\n  File \"/Users/huetuanthi/.local/share/uv/python/cpython-3.13.5-macos-aarch64-none/lib/python3.13/asyncio/runners.py\", line 195, in run\n    return runner.run(main)\n           ~~~~~~~~~~^^^^^^\n  File \"/Users/huetuanthi/.local/share/uv/pytho"
    },
    {
      "agent": "harness",
      "model_alias": "gpt52",
      "task_id": "hb-create-01",
      "task_category": "creation",
      "task_difficulty": "easy",
      "resolved": false,
      "duration_seconds": 0.3,
      "error": "",
      "output": "/Users/huetuanthi/dev/agents/harness/src/harness/core/loop.py:122: RuntimeWarning: coroutine 'OpenAIProvider.chat_completion_stream' was never awaited\n  async for event in self._provider.chat_completion_stream(\nRuntimeWarning: Enable tracemalloc to get the object allocation traceback\nTraceback (most recent call last):\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/bin/harness\", line 10, in <module>\n    sys.exit(cli())\n             ~~~^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1485, in __call__\n    return self.main(*args, **kwargs)\n           ~~~~~~~~~^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1406, in main\n    rv = self.invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1851, in invoke\n    rv = super().invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1269, in invoke\n    return ctx.invoke(self.callback, **ctx.params)\n           ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 824, in invoke\n    return callback(*args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/decorators.py\", line 34, in new_func\n    return f(get_current_context(), *args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/src/harness/cli/main.py\", line 126, in cli\n    asyncio.run(_run_agent(\n    ~~~~~~~~~~~^^^^^^^^^^^^\n        prompt_text,\n        ^^^^^^^^^^^^\n    ...<9 lines>...\n        interactive=interactive,\n        ^^^^^^^^^^^^^^^^^^^^^^^^\n    ))\n    ^^\n  File \"/Users/huetuanthi/.local/share/uv/python/cpython-3.13.5-macos-aarch64-none/lib/python3.13/asyncio/runners.py\", line 195, in run\n    return runner.run(main)\n           ~~~~~~~~~~^^^^^^\n  File \"/Users/huetuanthi/.local/share/uv/pytho"
    },
    {
      "agent": "harness",
      "model_alias": "gpt52",
      "task_id": "hb-bugfix-01",
      "task_category": "bugfix",
      "task_difficulty": "medium",
      "resolved": false,
      "duration_seconds": 0.3,
      "error": "",
      "output": "/Users/huetuanthi/dev/agents/harness/src/harness/core/loop.py:122: RuntimeWarning: coroutine 'OpenAIProvider.chat_completion_stream' was never awaited\n  async for event in self._provider.chat_completion_stream(\nRuntimeWarning: Enable tracemalloc to get the object allocation traceback\nTraceback (most recent call last):\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/bin/harness\", line 10, in <module>\n    sys.exit(cli())\n             ~~~^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1485, in __call__\n    return self.main(*args, **kwargs)\n           ~~~~~~~~~^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1406, in main\n    rv = self.invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1851, in invoke\n    rv = super().invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1269, in invoke\n    return ctx.invoke(self.callback, **ctx.params)\n           ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 824, in invoke\n    return callback(*args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/decorators.py\", line 34, in new_func\n    return f(get_current_context(), *args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/src/harness/cli/main.py\", line 126, in cli\n    asyncio.run(_run_agent(\n    ~~~~~~~~~~~^^^^^^^^^^^^\n        prompt_text,\n        ^^^^^^^^^^^^\n    ...<9 lines>...\n        interactive=interactive,\n        ^^^^^^^^^^^^^^^^^^^^^^^^\n    ))\n    ^^\n  File \"/Users/huetuanthi/.local/share/uv/python/cpython-3.13.5-macos-aarch64-none/lib/python3.13/asyncio/runners.py\", line 195, in run\n    return runner.run(main)\n           ~~~~~~~~~~^^^^^^\n  File \"/Users/huetuanthi/.local/share/uv/pytho"
    },
    {
      "agent": "harness",
      "model_alias": "gpt52",
      "task_id": "hb-analyze-01",
      "task_category": "analysis",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 0.3,
      "error": "",
      "output": "/Users/huetuanthi/dev/agents/harness/src/harness/core/loop.py:122: RuntimeWarning: coroutine 'OpenAIProvider.chat_completion_stream' was never awaited\n  async for event in self._provider.chat_completion_stream(\nRuntimeWarning: Enable tracemalloc to get the object allocation traceback\nTraceback (most recent call last):\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/bin/harness\", line 10, in <module>\n    sys.exit(cli())\n             ~~~^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1485, in __call__\n    return self.main(*args, **kwargs)\n           ~~~~~~~~~^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1406, in main\n    rv = self.invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1851, in invoke\n    rv = super().invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1269, in invoke\n    return ctx.invoke(self.callback, **ctx.params)\n           ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 824, in invoke\n    return callback(*args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/decorators.py\", line 34, in new_func\n    return f(get_current_context(), *args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/src/harness/cli/main.py\", line 126, in cli\n    asyncio.run(_run_agent(\n    ~~~~~~~~~~~^^^^^^^^^^^^\n        prompt_text,\n        ^^^^^^^^^^^^\n    ...<9 lines>...\n        interactive=interactive,\n        ^^^^^^^^^^^^^^^^^^^^^^^^\n    ))\n    ^^\n  File \"/Users/huetuanthi/.local/share/uv/python/cpython-3.13.5-macos-aarch64-none/lib/python3.13/asyncio/runners.py\", line 195, in run\n    return runner.run(main)\n           ~~~~~~~~~~^^^^^^\n  File \"/Users/huetuanthi/.local/share/uv/pytho"
    },
    {
      "agent": "harness",
      "model_alias": "gpt52",
      "task_id": "hb-refactor-01",
      "task_category": "refactor",
      "task_difficulty": "medium",
      "resolved": false,
      "duration_seconds": 0.3,
      "error": "",
      "output": "/Users/huetuanthi/dev/agents/harness/src/harness/core/loop.py:122: RuntimeWarning: coroutine 'OpenAIProvider.chat_completion_stream' was never awaited\n  async for event in self._provider.chat_completion_stream(\nRuntimeWarning: Enable tracemalloc to get the object allocation traceback\nTraceback (most recent call last):\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/bin/harness\", line 10, in <module>\n    sys.exit(cli())\n             ~~~^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1485, in __call__\n    return self.main(*args, **kwargs)\n           ~~~~~~~~~^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1406, in main\n    rv = self.invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1851, in invoke\n    rv = super().invoke(ctx)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 1269, in invoke\n    return ctx.invoke(self.callback, **ctx.params)\n           ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/core.py\", line 824, in invoke\n    return callback(*args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/.venv/lib/python3.13/site-packages/click/decorators.py\", line 34, in new_func\n    return f(get_current_context(), *args, **kwargs)\n  File \"/Users/huetuanthi/dev/agents/harness/src/harness/cli/main.py\", line 126, in cli\n    asyncio.run(_run_agent(\n    ~~~~~~~~~~~^^^^^^^^^^^^\n        prompt_text,\n        ^^^^^^^^^^^^\n    ...<9 lines>...\n        interactive=interactive,\n        ^^^^^^^^^^^^^^^^^^^^^^^^\n    ))\n    ^^\n  File \"/Users/huetuanthi/.local/share/uv/python/cpython-3.13.5-macos-aarch64-none/lib/python3.13/asyncio/runners.py\", line 195, in run\n    return runner.run(main)\n           ~~~~~~~~~~^^^^^^\n  File \"/Users/huetuanthi/.local/share/uv/pytho"
    },
    {
      "agent": "opencode",
      "model_alias": "gpt52",
      "task_id": "hb-multi-file-01",
      "task_category": "multi_file",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 19.4,
      "error": "",
      "output": "Done! I've successfully renamed `calculate_total()` to `compute_total()` in the function definition and updated all imports and function calls across all 4 files: `src/calc.py`, `src/api.py`, `src/views.py`, and `tests/test_calc.py`.\n2026/02/22 14:29:48 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:29:48 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "gpt52",
      "task_id": "hb-recovery-01",
      "task_category": "recovery",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 11.9,
      "error": "",
      "output": "Fixed the missing closing parenthesis on line 2. The script now runs successfully and outputs \"Hello, World!\".\n2026/02/22 14:30:08 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:30:08 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "gpt52",
      "task_id": "hb-tool-efficiency-01",
      "task_category": "tools",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 7.5,
      "error": "",
      "output": "Found TODO comments in 3 Python files:\n- `src/a.py`: \"TODO: implement\"\n- `src/c.py`: \"TODO: refactor\" \n- `src/d.py`: \"TODO later\"\n2026/02/22 14:30:20 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:30:20 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "gpt52",
      "task_id": "hb-context-01",
      "task_category": "context",
      "task_difficulty": "hard",
      "resolved": false,
      "duration_seconds": 12.2,
      "error": "",
      "output": "Created `database.py` with a Database class that uses PostgreSQL settings from `config.py`. The class supports connection management, query execution, and context manager usage.\n2026/02/22 14:30:27 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:30:27 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "gpt52",
      "task_id": "hb-create-01",
      "task_category": "creation",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 7.5,
      "error": "",
      "output": "Created `utils.py` with the `is_palindrome` function.\n2026/02/22 14:30:39 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:30:39 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "gpt52",
      "task_id": "hb-bugfix-01",
      "task_category": "bugfix",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 12.7,
      "error": "",
      "output": "Fixed! The `divide` function now returns `None` when dividing by zero, and all tests pass.\n2026/02/22 14:30:47 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:30:47 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "gpt52",
      "task_id": "hb-analyze-01",
      "task_category": "analysis",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 5.6,
      "error": "",
      "output": "The imported modules are:\n- os\n- sys\n- pathlib (Path)\n- collections (defaultdict)\n- json\n2026/02/22 14:31:00 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:31:00 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "opencode",
      "model_alias": "gpt52",
      "task_id": "hb-refactor-01",
      "task_category": "refactor",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 11.1,
      "error": "",
      "output": "Done. I've extracted the common error handling pattern into a `handle_errors` decorator that catches exceptions, prints the error, and returns `None`. Both functions now use this decorator instead of duplicating the try/except blocks.\n2026/02/22 14:31:05 WARN Ripgrep (rg) not found in $PATH. Some features might be limited or slower.\n2026/02/22 14:31:05 WARN FZF not found in $PATH. Some features might be limited or slower.\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "gpt52",
      "task_id": "hb-multi-file-01",
      "task_category": "multi_file",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 33.8,
      "error": "",
      "output": "Renamed `calculate_total()` \u2192 `compute_total()` and updated all callers/imports across the project:\n\n- `src/calc.py`: renamed function definition to `compute_total`\n- `src/api.py`: updated import and call site\n- `src/views.py`: updated import and call site\n- `tests/test_calc.py`: updated import and assertion call\n\nVerified there are no remaining `calculate_total` references (`grep -RIn \"\\\\bcalculate_total\\\\b\" .` returns none).\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "gpt52",
      "task_id": "hb-recovery-01",
      "task_category": "recovery",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 12.2,
      "error": "",
      "output": "Fixed the syntax error in `main.py` by adding the missing closing parenthesis on the `print(...)` line.\n\nVerified by running:\n\n- `python3 main.py`\n\nOutput:\n\n- `Hello, World!`\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "gpt52",
      "task_id": "hb-tool-efficiency-01",
      "task_category": "tools",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 9.7,
      "error": "",
      "output": "These Python files contain `TODO`:\n\n- `./src/a.py` (line 1)\n- `./src/c.py` (line 1)\n- `./src/d.py` (line 1)\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "gpt52",
      "task_id": "hb-context-01",
      "task_category": "context",
      "task_difficulty": "hard",
      "resolved": true,
      "duration_seconds": 39.3,
      "error": "",
      "output": "Read `config.py`:\n\n- `DB_HOST = 'localhost'`\n- `DB_PORT = 5432`\n- `DB_NAME = 'myapp'`\n- `DB_USER = 'admin'`\n\nCreated `database.py` implementing a `Database` class that:\n\n- Imports settings from `config.py` (with safe `getattr` defaults)\n- Optionally reads `DB_PASSWORD` from `config.py` or the `DB_PASSWORD` environment variable\n- Wraps a PostgreSQL connection using `psycopg2`\n- Provides `connect()`, `close()`, `cursor()`, and `execute(...)`\n- Supports context-manager usage (`with Database() as db:`), committing on success and rolling back on exception\n\nFile added:\n- `database.py`\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "gpt52",
      "task_id": "hb-create-01",
      "task_category": "creation",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 5.4,
      "error": "",
      "output": "Created `utils.py` with the requested function:\n\n```python\ndef is_palindrome(s):\n    \"\"\"Return True if *s* is a palindrome (case-insensitive).\"\"\"\n    s_lower = str(s).casefold()\n    return s_lower == s_lower[::-1]\n```\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "gpt52",
      "task_id": "hb-bugfix-01",
      "task_category": "bugfix",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 11.9,
      "error": "",
      "output": "Implemented safe divide-by-zero handling in `math_utils.py`.\n\n### Changes\n- **File:** `math_utils.py`\n- Updated `divide(a, b)` to catch `ZeroDivisionError` and **return `None`** instead of crashing.\n\n### Verification\n- Ran tests: `pytest -q`\n- Result: **1 passed** (`test_divide` now succeeds, including `divide(10, 0) is None`).\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "gpt52",
      "task_id": "hb-analyze-01",
      "task_category": "analysis",
      "task_difficulty": "easy",
      "resolved": true,
      "duration_seconds": 4.3,
      "error": "",
      "output": "Imported modules in `app.py`:\n\n- `os`\n- `sys`\n- `pathlib` (`Path`)\n- `collections` (`defaultdict`)\n- `json`\n"
    },
    {
      "agent": "pi-mono",
      "model_alias": "gpt52",
      "task_id": "hb-refactor-01",
      "task_category": "refactor",
      "task_difficulty": "medium",
      "resolved": true,
      "duration_seconds": 20.3,
      "error": "",
      "output": "Updated `handlers.py` to remove duplicated try/except blocks by extracting them into a shared decorator:\n\n- Added a `handle_errors` decorator that wraps a function call in `try/except`, prints `Error: {e}` on any exception, and returns `None`.\n- Applied `@handle_errors` to `get_user` and `get_item`, and removed their inline try/except logic.\n\nFiles changed:\n- `handlers.py`\n"
    }
  ]
}