Odpověď na názor

> Nenašel jsem cestu, jak by model uměl generovat spolehlivé diffy - správná čísla řádků prostě nedává ani GPT5

Pokud vím, tak se nikde nepoužívají čísla řádků, ale unikátní kontext. Viz třeba odkazovaný FileEditTool z Claude Code:

The tool will replace ONE occurrence of old_string with new_string in the specified file.

CRITICAL REQUIREMENTS FOR USING THIS TOOL:

1. UNIQUENESS: The old_string MUST uniquely identify the specific instance you want to change. This means

Include AT LEAST 3-5 lines of context BEFORE the change point

Include AT LEAST 3-5 lines of context AFTER the change point

Include all whitespace, indentation, and surrounding code exactly as it appears in the file

2. SINGLE INSTANCE: This tool can only change ONE instance at a time. If you need to change multiple instances

Make separate calls to this tool for each instance

Each call must uniquely identify its specific instance using extensive context

3. VERIFICATION: Before using this tool

Check how many instances of the target text exist in the file

If multiple instances exist, gather enough context to uniquely identify each one

Plan separate tool calls for each instance

WARNING: If you do not follow these requirements

The tool will fail if old_string matches multiple locations

The tool will fail if old_string doesn't match exactly (including whitespace)

You may change the wrong instance if you don't include enough context