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CBZOptimizer/docs/project-overview.md

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# Project Overview
CBZOptimizer is a Go CLI that optimizes comic archives (`.cbz` and `.cbr`) by converting page images to modern formats (currently WebP).
## High-level flow
1. Load chapters from archive files.
2. Decode pages and optionally split oversized pages.
3. Convert images with the selected converter.
4. Write optimized output as CBZ.
## Main components
- `cmd/cbzoptimizer`: CLI commands and flag wiring (`optimize`, `watch`).
- `internal/cbz`: archive loading and writing.
- `internal/manga`: chapter and page domain models.
- `internal/utils`: orchestration utilities (`optimize` flow and file helpers).
- `pkg/converter`: converter abstraction and format implementations.
## Watch mode
`watch` monitors a directory tree for archive file changes and runs optimization automatically. By default it only reacts to changes going forward; pass `--backfill` to also optimize archives that already exist in the folder at startup.
## Key runtime requirements
- Go 1.25+
- WebP encoder setup via `cmd/encoder-setup` for WebP conversion tests and runtime support.