cli-anything-calibre

A stateful CLI harness for Calibre e-book management. Wraps the real Calibre tools (calibredb, ebook-convert, ebook-meta) to give AI agents and scripts a clean, structured interface for library operations, metadata editing, and format conversion.

Installation

This CLI is installed as part of the cli-anything-calibre package:

pip install git+https://github.com/HKUDS/CLI-Anything.git#subdirectory=calibre/agent-harness

Prerequisites:

• Python 3.10+
• Calibre must be installed on your system (hard dependency)

# Debian/Ubuntu
sudo apt-get install calibre

# macOS
brew install --cask calibre

# Verify tools are in PATH
which calibredb
which ebook-convert
which ebook-meta

Usage

Basic Commands

# Show help
cli-anything-calibre --help

# Start interactive REPL mode
cli-anything-calibre

# Connect to a Calibre library
cli-anything-calibre library connect ~/Calibre\ Library

# Run with JSON output (for agent consumption)
cli-anything-calibre --json books list

REPL Mode

When invoked without a subcommand, the CLI enters an interactive REPL session:

cli-anything-calibre
# Enter commands interactively with tab-completion and history
# Use 'help' to see available commands
# Use 'quit' or 'exit' to leave

Command Groups

Library

Library management commands.

Books

Book operations (wrap calibredb).

Meta

Metadata editing (wrap calibredb set_metadata).

Formats

Format management (wrap calibredb + ebook-convert).

Custom

Custom columns (wrap calibredb).

Catalog

Catalog generation.

Examples

Connect and List Books

Connect to your Calibre library and list books.

cli-anything-calibre library connect ~/Calibre\ Library
cli-anything-calibre books list
# Or with JSON output
cli-anything-calibre --json books list --search "author:asimov"

Search and Filter

Search books using Calibre query language.

cli-anything-calibre books search "title:Foundation"
cli-anything-calibre books search "author:asimov and tags:scifi"
cli-anything-calibre books search "rating:>3"

Metadata Editing

Set metadata fields on books.

cli-anything-calibre meta set 42 title "New Title"
cli-anything-calibre meta set 42 series "Foundation"
cli-anything-calibre meta set 42 series_index 1
cli-anything-calibre meta set 42 tags "scifi,classic"
cli-anything-calibre meta set 42 rating 5

Format Conversion

Convert between e-book formats.

cli-anything-calibre formats convert 42 EPUB MOBI
cli-anything-calibre formats convert 42 EPUB PDF --output /tmp/book.pdf

Export Chapters as PDFs

Export each chapter of an EPUB as a separate PDF file.

cli-anything-calibre books export-chapters 42 --to-dir ./pdfs
cli-anything-calibre books export-chapters 42 --to-dir ./pdfs --chapters 1-5

Calibre Query Language

Used with books search and books list --search:

author:asimov                    # Author contains "asimov"
title:"Foundation"               # Title phrase
tags:fiction                     # Tag match
rating:>3                        # Rating greater than 3
series:"Foundation"              # Series match
pubdate:[2020-01-01,2021-12-31]  # Date range
identifiers:isbn:1234567890      # Specific identifier
has:cover                        # Has cover image
not:tags:fiction                 # Negation
author:asimov and tags:scifi     # Boolean AND

Key Metadata Fields

Supported Formats

Input: EPUB, MOBI, AZW, AZW3, PDF, HTML, DOCX, ODT, FB2, TXT, RTF, LIT, and more

Output (conversion): EPUB, MOBI, AZW3, PDF, HTML, DOCX, TXT, and more

State Management

The CLI maintains session state with:

• Session file: ~/.cli-anything-calibre/session.json
• Library path persistence: Active library is saved across sessions
• Environment override: CALIBRE_LIBRARY environment variable

Output Formats

All commands support dual output modes:

• Human-readable (default): Tables, colors, formatted text
• Machine-readable (--json flag): Structured JSON for agent consumption

# Human output
cli-anything-calibre books list

# JSON output for agents
cli-anything-calibre --json books list

For AI Agents

When using this CLI programmatically:

1. Always use --json flag for parseable output
2. Check return codes - 0 for success, non-zero for errors
3. Parse stderr for error messages on failure
4. Verify outputs exist after export/conversion operations
5. Use --library flag or CALIBRE_LIBRARY env to specify library path
6. Chapter export requires EPUB format - convert first if needed

More Information

• Full documentation: See README.md in the package
• Architecture SOP: See CALIBRE.md in the agent-harness directory
• Test coverage: See test_core.py and test_full_e2e.py in the tests directory
• Methodology: See HARNESS.md in the cli-anything-plugin

Version

1.0.0