Nushell Shell In-Depth Reference

Comprehensive reference for nushell shell internals, with emphasis on the completion system and how external tools hook into it.

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Keywords	Reference
NuCompleter, completer closure, spans, external completer, custom completion, @ syntax, completion algorithm, fuzzy, prefix, substring, NuMatcher, SemanticSuggestion, Suggestion struct, append_whitespace, completion_options, CommandCompletion, FileCompletion, FlagCompletion, CustomCompletion, CommandWideCompletion, context-aware completion, completion fallback, null fallback, carapace completer, fish completer, alias workaround, CARAPACE_LENIENT, max_results	references/completion.md
Reedline, Completer trait, Suggestion, Span, menu system, ColumnarMenu, ListMenu, DescriptionMenu, IdeMenu, menu layout, menu marker, menu style, menu keybindings, menu event, menu source, menu record, partial_complete, replace_in_buffer, MenuEvent, traversal direction, page_size, selection_rows, description_rows, only_buffer_difference	references/reedline.md
quoting, single quotes, double quotes, raw string, backtick, bare word, string interpolation, $'...', $"...", escape sequence, metacharacters, tilde expansion, path quoting, shlex, open quote, Patch	references/quoting.md
SyntaxShape, Type, Value, type system, CompleterWrapper, shape_filepath, shape_string, shape_flag, shape_internalcall, shape_external, type annotation, input/output types, subtyping, cell-path, record type, list type, table type, @ syntax, type-driven completion	references/types.md
extern, export extern, extern signature, flag completion, argument completion, subcommand completion, module-based extern, completion function, def completer, rest parameter, optional parameter, quoted command string, caret sigil, externs and modules	references/externs.md
$env.config, completions, external completer, completion algorithm, sort, case_sensitive, max_results, env.nu, config.nu, login.nu, autoload, NU_LIB_DIRS, startup order, XDG, default_config.nu, default_env.nu, vendor-autoload, user-autoload, config nu, config env	references/configuration.md
style, color, attr, fg, bg, color_config, shape_*, hex color, named color, abbreviation, light variant, background color, LS_COLORS, nu_ansi_term, style record, completion style, menu style, selected_text, description_text	references/style.md
pipeline, PipelineData, execution model, two-stage, parse, evaluate, external command, caret sigil, ExternalStream, ListStream, $in, input/output types, structured data, command search, module system, use, hide, export, submodule	references/execution.md