---
# claudbg-i09w
title: App error type and Result alias
status: completed
type: task
priority: normal
created_at: 2026-03-27T19:38:56Z
updated_at: 2026-03-28T04:15:59Z
parent: claudbg-h7xu
---

Created src/error.rs with AppError enum (Io, Parse, Db, NotFound, InvalidArg) and Result<T> alias using thiserror. All variants have doc comments. Six unit tests verify Display impl for each variant and From<io::Error> conversion. Updated src/lib.rs to declare pub mod error and src/main.rs to import claudbg::error::Result.