Build Python command-line applications with Typer by looking up commands, arguments, options, callbacks, help output, and shell completion. The reference also explains how to test and package an app, and how Typer converts its definitions for Click.
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Use when building CLI applications with fastapi/typer — creating commands, defining CLI arguments and options, type-hint-driven parameter parsing, callbacks, context, help customization, shell completion, testing, packaging, or Typer internals. Triggers on: "typer", "typer.run", "typer.Typer", "typer app", "typer command", "typer argument", "typer option", "typer callback", "typer context", "Annotated", "typer.Argument", "typer.Option", "typer.Context", "CliRunner", "add_typer", "rich_markup_mode", "typer completion", "typer autocompletion", "typer echo", "typer test", "typer package", "typer click", "get_command".
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Reference for building CLI applications with typer. Covers the public API, type-driven parameter declaration, and how Typer wraps Click internally.
Load the reference that matches your task. When in doubt, load multiple references.
| Keywords | Reference |
|---|---|
| Typer, typer.run, app, @app.command, @app.callback, add_typer, subcommand, group, one or multiple commands, TyperInfo, CommandInfo, suggest_commands, invoke_without_command | references/commands.md |
| typer.Argument, typer.Option, Annotated, default value style, Ellipsis, required, optional, envvar, prompt, confirmation_prompt, short name, metavar, show_default, help, OptionInfo, ArgumentInfo, ParamMeta | references/parameters.md |
| type conversion, parameter type, str, int, float, bool, Enum, Literal, choices, case_sensitive, FileText, FileTextWrite, FileBinaryRead, FileBinaryWrite, pathlib.Path, exists, min, max, clamp, count, DateTime, UUID, list, tuple | references/parameter-types.md |
| typer.Context, ctx, CallbackParam, invoked_subcommand, resilient_parsing, allow_extra_args, ignore_unknown_options, find_root, find_object, ensure_object, fail, abort, exit, get_parameter_source | references/context.md |
| help, docstring, rich, rich_markup_mode, rich_help_panel, markdown help, deprecated, epilog, printing, echo, style, secho, stderr, rich markup, suggest_commands | references/help-output.md |
| completion, shell completion, install-completion, show-completion, autocompletion, incomplete, shellingham, custom completion, completion function | references/completion.md |
| testing, pytest, CliRunner, Result, invoke, exit_code, input, isolated filesystem | references/testing.md |
| package, pyproject.toml, project.scripts, wheel, python -m, main.py, publish, docs generation | references/package.md |
| internals, source code, main.py, core.py, models.py, utils.py, _click, vendored click, get_command, get_group_from_info, get_command_from_info, get_callback, TyperGroup, TyperCommand, TyperOption, TyperArgument, DefaultPlaceholder, rich_utils | references/internals.md |
skills/cobra/). Typer is Click-based, not cobra-based; Typer's own internals are covered in references/internals.md.Typer versions covered: 0.12+ through 0.27.x. Since v0.26.0 Click is vendored inside typer/_click/, so no external Click dependency exists at runtime (see references/internals.md).
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Use this reference to manage software with Homebrew on macOS or Linux, understand formulas and casks, maintain Brewfiles and services, troubleshoot installations, or work on formula and cask development tasks.
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Use this reference to build and maintain terminal user interfaces in Go with Bubble Tea. It explains the Model/Update/View cycle, commands and messages, input, rendering, program lifecycle, tests, component composition, and patterns for larger applications.
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Use this reference for JavaScript and TypeScript development with Bun. It explains CLI commands, dependency and lockfile management, testing, bundling code, runtime APIs for files and servers, the Bun shell, configuration, and environment variables.
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Use this reference to manage Git work with the GitButler CLI (`but`), including virtual and stacked branches, assigning changes, editing commits, resolving conflicts, and creating pull requests. It also covers the workspace, operation history, interactive TUI, configuration, and AI agent setup.
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Build and maintain carapace shell completions for command-line tools. The reference covers YAML specs, custom completion actions, shell setup, DSL-aware parsing, MCP use, and documentation for suggested values.
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Use this reference to work with Cargo, Rust’s package manager and build tool. It explains project manifests, dependencies, features, workspaces, build profiles, configuration, registries, publishing, and commands for building, testing, and inspecting projects.
中文简介正在准备中。当前显示英语简介。