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# Description If `$env.TRANSIENT_PROMPT_COMMAND` is not set, use the prompt created by `$env.PROMPT_COMMAND` instead of running the command a second time. As a side effect, `$env.TRANSIENT_PROMPT_COMMAND` now runs after the hooks `pre_prompt` and `env_change`, instead of before. # User-Facing Changes - `$env.PROMPT_COMMAND` gets run only once per prompt instead of twice - `$env.TRANSIENT_PROMPT_COMMAND` now sees any environment set in a `pre_prompt` or `env_change` hook, like `$env.PROMPT_COMMAND` does
Nushell core libraries and plugins
These sub-crates form both the foundation for Nu and a set of plugins which extend Nu with additional functionality.
Foundational libraries are split into two kinds of crates:
- Core crates - those crates that work together to build the Nushell language engine
- Support crates - a set of crates that support the engine with additional features like JSON support, ANSI support, and more.
Plugins are likewise also split into two types:
- Core plugins - plugins that provide part of the default experience of Nu, including access to the system properties, processes, and web-connectivity features.
- Extra plugins - these plugins run a wide range of different capabilities like working with different file types, charting, viewing binary data, and more.