claude-print/notes/bf-3ag.md

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# Bead bf-3ag: Session struct and version resolution
## Task Summary
Create `src/session.rs` with:
- SessionResult struct with transcript, claude_version, duration_ms
- run() function signature with all parameters
- Version resolution: Command::new(claude_bin).arg("--version").output()
- Add pub mod session to lib.rs
- Unit test test_version_resolution mocks claude --version output
## Status: Already Completed
The work for this bead was completed in previous commits:
- `557a810 feat(session): implement Session struct and version resolution`
- `de4d914 test(session): fix version resolution test and add struct validation test`
## Re-verification: 2026-06-13
All acceptance criteria remain satisfied:
- ✅ session.rs compiles
- ✅ SessionResult struct with all required fields (transcript, claude_version, duration_ms)
- ✅ run() function with all parameters implemented
- ✅ Version resolution using Command::new(claude_bin).arg("--version").output()
- ✅ pub mod session in lib.rs
- ✅ Unit test test_version_resolution_with_mock_binary passes
- ✅ cargo test passes (4/4 session tests)
## Verification
All requirements have been verified:
1.**SessionResult struct** - Lines 22-29 in src/session.rs
- Contains `transcript: TranscriptResult`
- Contains `claude_version: String`
- Contains `duration_ms: u64`
2.**run() function** - Lines 55-248 in src/session.rs
- Takes `claude_bin: &Path`
- Takes `claude_args: &[OsString]`
- Takes `prompt: Vec<u8`
- Takes `timeout_secs: Option<u64>`
- Returns `Result<SessionResult>`
3.**Version resolution** - Lines 251-268 in src/session.rs
- Uses `Command::new(claude_bin).arg("--version").output()`
- Parses stdout/stderr for version string
- Returns trimmed first line
4.**Module export** - Line 10 in src/lib.rs
- Contains `pub mod session;`
5.**Unit tests pass** - All 4 session tests pass:
- `test_resolve_claude_version_with_nonexistent_binary`
- `test_session_result_struct_has_required_fields`
- `test_resolve_claude_version_with_echo`
- `test_version_resolution_with_mock_binary`
## Test Output
```
running 4 tests
test session::tests::test_resolve_claude_version_with_nonexistent_binary ... ok
test session::tests::test_session_result_struct_has_required_fields ... ok
test session::tests::test_resolve_claude_version_with_echo ... ok
test session::tests::test_version_resolution_with_mock_binary ... ok
test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured
```
## Conclusion
The bead requirements are fully satisfied by the existing implementation. No additional code changes are required.