hie-bios is a Haskell library and CLI tool that manages the configuration and initialization of GHC API sessions for IDE tools like haskell-language-server. It finds and loads a 'Cradle' configuration from a `hie.yaml` file or via implicit detection (e.g., stack.yaml, cabal.project), then obtains the necessary GHC compiler flags by invoking build tools (cabal, stack, or a user-supplied script). It supports multiple cradle types (cabal, stack, bios, direct, multi, none) and handles the full lifecycle: locating the project root, parsing configuration, running build tools with wrapper scripts to capture flags, caching interface files, and setting up GHC's DynFlags and targets. The architecture is modular, with clear separation between config parsing, cradle resolution, process execution, and GHC session management. The code is well-structured, uses modern Haskell patterns (monad transformers, CPS for temporary files), and has an extensive test suite covering various project layouts and tool combinations. Key reusable components include the process utility module (HIE.Bios.Process) for running commands with temp-file outputs and caching, and the GHC version compatibility layer (HIE.Bios.Ghc.Gap).