bug: Windsurf changes attributed as human instead of windsurf

[codeprakhar25]

Bug

Code written by Windsurf Cascade is appearing in the ledger attributed to the git user (human) rather than windsurf.

Expected:

{"agent": "windsurf", "model": "claude-3-7-sonnet-20250219", ...}

Actual:

{"agent": "Prakhar Khatri", "model": null, ...}

Root cause (suspected):
The post_cascade_response_with_transcript or post_write_code hooks in ~/.codeium/windsurf/hooks.json may not be firing correctly, or the session transcript format changed in a recent Windsurf version.

Debugging steps:

1. After a Windsurf edit, check ~/.agentdiff/logs/windsurf-hook-fired.log
2. If empty → hook is not firing. Re-run agentdiff init and verify ~/.codeium/windsurf/hooks.json has the correct hook entries
3. If the log has entries → inspect payload shape for model and writes fields

Also: Windsurf does not currently surface which underlying model was used (e.g. Claude Sonnet vs GPT-4o). If Windsurf exposes this in the transcript, we should capture and store it.

Environment:

• agentdiff v0.1.16
• Windsurf (latest)