Follow-up from #34 review.
toolpath_convo::derive::file_write_diff handles the Write { content } shape by diffing against "" — i.e. emitting an all-+ hunk. That's honest for new files but misleading for overwrites, where a Write that replaced existing content will appear in the Path document as if the file didn't exist before.
The conversation JSONL doesn't capture prior state, so we can't reconstruct it from the log alone. Options:
- Consult git — when the derivation has access to
path.base.uri (e.g. a file:// project path we already use for cwd), read git show HEAD:<relative-path> and diff against that. Best-effort; skip if not a git repo or path not tracked.
- Read the working tree at derivation time — the cwd is on disk; we can
fs::read_to_string(path) to get the current state, which is the post-write state. Combined with git HEAD → pre-write state. Same as (1) from a different angle.
- Give up — document the asymmetry in
file_write_diff's rustdoc and accept additions-only for content.
(1) is the richest answer but depends on having a git base; needs a clean fallback to (3) when absent.
Pointers
Follow-up from #34 review.
toolpath_convo::derive::file_write_diffhandles theWrite { content }shape by diffing against""— i.e. emitting an all-+hunk. That's honest for new files but misleading for overwrites, where a Write that replaced existing content will appear in the Path document as if the file didn't exist before.The conversation JSONL doesn't capture prior state, so we can't reconstruct it from the log alone. Options:
path.base.uri(e.g. afile://project path we already use for cwd), readgit show HEAD:<relative-path>and diff against that. Best-effort; skip if not a git repo or path not tracked.fs::read_to_string(path)to get the current state, which is the post-write state. Combined with git HEAD → pre-write state. Same as (1) from a different angle.file_write_diff's rustdoc and accept additions-only forcontent.(1) is the richest answer but depends on having a git base; needs a clean fallback to (3) when absent.
Pointers
crates/toolpath-convo/src/derive.rs::file_write_diff— add a before-state lookup hookcrates/toolpath-claude/src/derive.rs— call-site hasconversation.project_pathandentry.cwd