[Feature Request]: GPT 5.1 apply_patch_call harness support on agent level #2212
Description
Is your feature request related to a problem? Please describe.
The apply_patch tool is a structured code editing interface that allows GPT-5.1 to propose file operations (create, update, delete) using V4A diff format. Unlike traditional code generation where you get unstructured text, apply_patch returns actionable, parseable patches that can be programmatically applied.
How it Works:
- Your code provides file context → GPT-5.1
- GPT-5.1 analyzes and proposes patches (apply_patch_call)
- Your harness applies patches to filesystem
- You report success/failure back (apply_patch_call_output)
- Model iterates or explains changes
Key Operations:
- create_file: Create new file with full content as diff
- update_file: Modify existing file with additions/deletions
- delete_file: Remove file entirely
Describe the solution you'd like
class PatchEditor(Protocol):
"""Protocol for implementing file operations for apply_patch."""
Additional context
No response