fix: cursor CLI capture for WSL2 (hook execution + path normalization + transcript lookup)

[codeprakhar25]

What does this PR do?

Fixes cursor agent traces never appearing in agentdiff when working with Cursor on WSL2. Three independent bugs combined to silently drop every cursor event.

Bug 1 — Hook never executed (src/configure/cursor.rs)
The Windows-side ~/.cursor/hooks.json was written with python3 /home/prakh/.agentdiff/.... Cursor (a Windows app) runs hooks in a Windows shell where that Linux path is invalid, so every hook invocation failed silently. Fixed by prefixing with wsl for any hooks.json under /mnt/ (Windows-side paths).

Bug 2 — UNC paths broke repo detection (scripts/capture-cursor.py)
When Cursor opens a WSL workspace, it passes file paths as Windows UNC strings like \\wsl.localhost\Ubuntu\home\prakh\agentdiff\src\main.rs. After backslash conversion this became /wsl.localhost/Ubuntu/home/... — a path that doesn't exist in WSL. git rev-parse failed, no .git/agentdiff/ was found, and the script exited with SKIP no_agentdiff_init. Fixed in normalize_path to strip the WSL UNC host prefix and convert Windows drive letters (D:/ → /mnt/d/).

Bug 3 — Transcript lookup missed (scripts/capture-cursor.py)
get_prompt_from_transcript derived the project slug as home-prakh-agentdiff from the Linux path, but Cursor stores data under wsl-localhost-Ubuntu-home-prakh-agentdiff (the Windows UNC slug). The prompt was always "unknown". Fixed by scanning both the Linux-side and Windows-side cursor projects/ dirs for a matching slug suffix, with Linux $USER used to pick the right Windows user directory (avoids reading from unrelated system accounts on shared machines).

Type of change

• Bug fix
• New agent support
• New feature
• Refactor / cleanup
• Docs

Testing

• cargo test --locked passes
• python3 -m unittest discover -s scripts/tests -p "test_*.py" passes
• Manually tested with Cursor on WSL2 — cursor events now appear in session.jsonl and are attributed correctly in agentdiff report

Checklist

• Follows existing code style
• No new dependencies without discussion
• Updated README / CONTRIBUTING if needed

[github-actions]

AgentDiff Report

Summary

Agent	Lines	%
claude-code	1016	96%
Prakhar Khatri	42	4%

Review Context

• Intent: unspecified (1058 lines, 4 files)
  • Agent/model: Prakhar Khatri, claude-code / claude-sonnet-4-6
  • Prompt: ok it is working now just check the PR comments on the PR I created for it and fill in the description let's complete the PR and make it ready to be merged....., the traces written by cursor agent is not being reported in agentdiff while I work with cursor CLI, what's the main issue let's try and fix it

Files To Review First

File	Lines	Dominant Agent	Intent	Context
scripts/test-pipeline-comprehensive.py	897	claude-code	unspecified	trace 835227e9
scripts/capture-cursor.py	106	claude-code	unspecified	trace 835227e9
.github/workflows/agentdiff-policy.yml	46	Prakhar Khatri	unspecified	trace 3b81698e
src/configure/cursor.rs	9	claude-code	unspecified	trace 835227e9

Trace details

Trace	Agent	Intent	Files	Lines
835227e9	claude-code	unspecified	scripts/capture-cursor.py, scripts/test-pipeline-comprehensive.py, src/configure/cursor.rs	992
3b81698e	Prakhar Khatri	unspecified	.github/workflows/agentdiff-policy.yml	42
761a7e57	claude-code	unspecified	.github/workflows/agentdiff-policy.yml, scripts/capture-cursor.py	24

[greptile-apps]

Greptile Summary

This PR fixes three independent bugs that caused Cursor agent traces to be silently dropped on WSL2: the hook command is now prefixed with wsl for Windows-side paths so the Linux script path resolves correctly, Windows UNC paths and drive letters are normalized before git rev-parse, and transcript lookup now scans both Linux-side and Windows-side Cursor project directories with multiple slug patterns.

Confidence Score: 5/5

Safe to merge; both remaining findings are P2 and do not affect the primary WSL2 code path.

All three targeted bugs are well-diagnosed and correctly fixed. The two P2 findings (dead if in _wsl_distro_name and inconsistent Windows user detection in Rust vs Python) are harmless in the common single-user WSL2 scenario and don't regress any existing behavior.

scripts/capture-cursor.py (_wsl_distro_name logic) and src/configure/cursor.rs (Windows user directory selection).

Important Files Changed

Filename	Overview
scripts/capture-cursor.py	Adds WSL UNC path normalization, drive-letter mapping, and multi-slug transcript lookup; one logic bug in _wsl_distro_name (dead if branch) causes the function to return the OS name on native Linux instead of empty string, harmlessly adding an extra non-existent candidate path.
src/configure/cursor.rs	Correctly introduces wsl_cmd/linux_cmd split and /mnt/ detection for Bug 1 fix; Windows user directory scan doesn't use the Linux $USER env var to prefer a matching Windows username, unlike the corresponding Python code.
.github/workflows/agentdiff-policy.yml	New policy-check workflow correctly passes github.head_ref through an env var (HEAD_REF) rather than direct interpolation, avoiding the injection issue flagged on the companion workflow; install step uses `curl
.github/workflows/agentdiff-consolidate.yml	Removes the unused BRANCH variable that held the unquoted github.head_ref expression, cleaning up the previously flagged injection surface.
README.md	Documentation-only updates adding agentdiff context, agentdiff install-skill, and --context report flag examples; no code changes.

_{Reviews (2): Last reviewed commit: "fix: address PR review issues — shell in..." | Re-trigger Greptile}