# 11. Reporting Bugs and Stability of Cabal Interfaces

- 11.1. Reporting bugs and deficiencies
- 11.2. Stability of Cabal interfaces
  - 11.2.1. Cabal file format
  - 11.2.2. Command-line interface
    - 11.2.2.1. Very Stable Command-line interfaces
    - 11.2.2.2. Stable Command-line interfaces
    - 11.2.2.3. Unstable command-line
  - 11.2.3. Functions and Types
    - 11.2.3.1. Very Stable API
    - 11.2.3.2. Semi-stable API
    - 11.2.3.3. Unstable API
  - 11.2.4. Hackage