76 lines
2.4 KiB
Markdown
76 lines
2.4 KiB
Markdown
# CLAUDE.md
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This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
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## Project Overview
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**Skim** is a TUI email client built with Rust and Ratatui. It connects to IMAP servers (including Gmail) and displays inbox messages with a split-pane interface: email list on top, message preview on the bottom.
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## Build and Run Commands
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```bash
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# Build the project
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cargo build
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# Run the application
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cargo run
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# Build optimized release version
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cargo build --release
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# Check code without building
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cargo check
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# Format code
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cargo fmt
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# Run clippy linter
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cargo clippy
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```
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## Test Mail Server
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A Docker-based IMAP mail server is available for testing:
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```bash
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# Start the mail server
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docker-compose up -d
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# Create a test user
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docker exec -it mailserver setup email add test@example.com password123
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# Stop the mail server
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docker-compose down
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```
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Connection details: localhost:143 (IMAP) or localhost:993 (IMAPS). See `MAIL_SERVER_SETUP.md` for detailed usage including Gmail configuration.
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## Architecture
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- **`src/main.rs`** — Terminal setup/teardown, delegates to `lib::main`
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- **`src/lib.rs`** — Main event loop, UI rendering, worker thread coordination
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- **`src/inbox.rs`** — IMAP inbox operations (refresh, fetch older, fetch body)
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- **`src/connect.rs`** — IMAP connection handling (plain TCP and TLS)
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- **`src/config.rs`** — Configuration loading from `config.toml`
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### Key patterns
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- IMAP operations run in a **background worker thread** communicating via `mpsc` channels, keeping the UI responsive
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- Emails are loaded in **batches of 50**, with lazy loading when scrolling past the end
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- **Tab** switches focus between inbox list and preview pane
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- Selection is **preserved across refreshes** by matching IMAP sequence numbers
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## Key Dependencies
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- **ratatui (0.30)**: TUI framework providing widgets, layouts, and rendering
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- **crossterm (0.29)**: Cross-platform terminal manipulation (raw mode, events, alternate screen)
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- **imap (2.4)**: IMAP protocol client
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- **native-tls (0.2)**: TLS support for secure IMAP connections (Gmail)
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- **chrono (0.4)**: Date parsing and timezone conversion
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## Development Notes
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- Uses Rust edition 2024
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- Terminal is set to raw mode to capture individual key presses
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- The alternate screen prevents terminal history pollution
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- `config.toml` contains credentials and is gitignored — see `config.toml.example` for the format
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