Инструменты для написания кода (чтение, редактирование, Bash)

Какие инструменты нужны агенту для работы с кодом?

read_file

def read_file(path: str, start_line: int = 0, end_line: int | None = None) -> str:
    with open(path) as f:
        lines = f.readlines()
    return ''.join(lines[start_line:end_line])

# --- demo ---
with open('demo_source.py', 'w', encoding='utf-8') as f:
    f.write('line0\nline1\nline2\nline3\nline4\n')

snippet = read_file('demo_source.py', start_line=1, end_line=3)
print('Lines 1-2 of demo_source.py:')
print(snippet)

Чтение диапазонов строк экономит токены

edit_file (замена строки)

def edit_file(path: str, old_string: str, new_string: str):
    contents = read_file(path)
    occurrences = contents.count(old_string)
    if occurrences == 0:
        raise ValueError('old_string not found')
    if occurrences > 1:
        raise ValueError('old_string is not unique')
    contents = contents.replace(old_string, new_string)
    with open(path, 'w') as f:
        f.write(contents)

Почему замена строк лучше DIFFS

write_file

def write_file(path: str, content: str):
    os.makedirs(os.path.dirname(path), exist_ok=True)
    with open(path, 'w') as f:
        f.write(content)

bash

def bash(command: str, timeout: int = 60) -> dict:
    import subprocess
    try:
        result = subprocess.run(command, shell=True, capture_output=True, text=True, timeout=timeout)
        return {'stdout': result.stdout[-5000:], 'stderr': result.stderr[-5000:], 'exit_code': result.returncode}
    except subprocess.TimeoutExpired:
        return {'error': 'timeout', 'exit_code': -1}

# --- demo ---
result = bash("echo hello from the sandboxed shell")
print(f"exit_code={result['exit_code']}")
print(f"stdout={result['stdout'].strip()!r}")

Изолируйте инструмент bash

Обрезайте длинный вывод

stderr = 'error line\n' * 1000

if len(stderr) > 5000:
    stderr = '...[truncated]...' + stderr[-5000:]

print(f'Truncated stderr length: {len(stderr)}')

search / grep

def grep(pattern: str, path: str = '.', file_glob: str = '**/*') -> list[str]:
    matches = []
    for f in glob(file_glob, recursive=True):
        for i, line in enumerate(open(f)):
            if re.search(pattern, line):
                matches.append(f'{f}:{i+1}: {line.rstrip()}')
    return matches[:50]

list_files

def list_files(path: str = '.') -> list[str]:
    return [p for p in glob(f'{path}/**', recursive=True) if os.path.isfile(p)][:200]

Дополнительно: инструменты AST

def find_function(name: str, path: str):
    tree = ast.parse(open(path).read())
    for node in ast.walk(tree):
        if isinstance(node, ast.FunctionDef) and node.name == name:
            return ast.unparse(node)

Здесь описания инструментов важнее всего

description='Edit a file by replacing a unique string. The old_string MUST appear exactly once in the file. Reads the file first to validate. Use this for any code change in an existing file.'

Это весь набор инструментов

Шаблон редактирования

Повторение