\n\nQuick Guide: Use
\n@clack/promptsfor pre-styled interactive CLI prompts (text, select, multiselect, confirm, spinner, progress). CheckisCancel()after EVERY prompt call -- users can Ctrl+C at any point.cancel()only prints; exit after it, with a non-zero code. Usegroup()for multi-step flows with centralized cancellation. Use@clack/coreonly when building fully custom prompt UIs. ESM-only since v1.0.
<critical_requirements>
\n\n\nAll code must follow project conventions in CLAUDE.md (kebab-case, named exports, import ordering,
\nimport type, named constants)
(You MUST check isCancel() after EVERY prompt call -- skipping this causes silent crashes when users press Ctrl+C)
(You MUST exit the process after cancel() -- the cancel message prints but execution continues otherwise)
(You MUST exit with a NON-ZERO code on cancellation, taking the value from the CLI framework's exit-code table where one exists and using 130 where none does -- exiting 0 tells every caller the work succeeded)
\n(You MUST use group() with onCancel for multi-step flows -- it handles cancellation centrally so you don't check each prompt individually)
(You MUST call spinner.stop() before any other output -- overlapping spinner output with prompts or logs corrupts the terminal)
</critical_requirements>
\nAuto-detection: @clack/prompts, @clack/core, clack, isCancel, intro, outro, cancel, spinner, group, text prompt, select prompt, confirm prompt, multiselect, groupMultiselect, selectKey, note, log, tasks, progress, taskLog, stream, box, autocomplete, date prompt, path prompt, updateSettings
\nWhen to use:
\nWhen NOT to use:
\ny/n confirmation that doesn't need styling (plain readline suffices)Key patterns covered:
\nDetailed Resources:
\n<decision_framework>
\nNeed user input?\n|\n+-> Single value?\n| +-> Free text -> text() or password()\n| +-> One of N choices -> select() (list) or selectKey() (keyboard shortcut)\n| +-> Yes/No -> confirm()\n| +-> Date -> date()\n| +-> File path -> path()\n|\n+-> Multiple values?\n| +-> Flat list -> multiselect()\n| +-> Grouped categories -> groupMultiselect()\n| +-> Searchable -> autocomplete() or autocompleteMultiselect()\n|\n+-> Multiple prompts in sequence?\n +-> group() with onCancel for centralized handling\n\nNeed to show progress?\n|\n+-> Indeterminate wait -> spinner()\n+-> Known total steps -> progress()\n+-> Sequential tasks -> tasks()\n+-> Detailed logs per task -> taskLog()\n\nNeed styled output?\n|\n+-> Status message -> log.info/warn/error/success/step()\n+-> Important notice -> note() or box()\n+-> Streaming content -> stream.info/warn/error/success()\n</decision_framework>
\n<red_flags>
\nHigh Priority Issues:
\nisCancel() check after a prompt -- the return value is value | symbol, and using the symbol as a string crashes or produces garbage. Always check before using the value.process.exit() after cancel() -- cancel() only prints a message, it does not stop execution. The process continues running.0 after cancel() -- a cancelled run reports success to every caller, so cli && next-step runs the next step against a half-finished state. Exit non-zero: the framework's cancellation constant, or 130 when there is no framework table.spinner.stop() first.require() with @clack/prompts v1.0+ -- the package is ESM-only since v1.0. Use import syntax.Medium Priority Issues:
\ngroup() for multi-step flows -- checking isCancel() after every single prompt is verbose and error-prone. group() with onCancel centralizes this.validate option -- prompts accept invalid input by default. Add validation for any input that has constraints.multiselect without required: false when zero selections should be valid -- by default, at least one item must be selected.Gotchas & Edge Cases:
\nisCancel() returns true for the cancel symbol but also narrows the TypeScript type -- always use it as a type guard before accessing the valuespinner() returns an object, not a promise -- call .start() separatelygroup() prompt functions receive { results } with all previously collected values, but TypeScript types each value as possibly undefined since earlier prompts might not have run yetconfirm() returns boolean | symbol, not just boolean -- still needs isCancel() check when used outside group()select() generic type parameter controls the return type -- select<\"react\" | \"vue\">({...}) narrows the resultlog.warn has an alias log.warning -- both work identicallyprogress.advance() with no arguments advances by 1 -- the step parameter is optionalnote() and box() are synchronous (not prompts) -- they return void, not promisessignal: AbortSignal for programmatic cancellation (e.g., timeouts)updateSettings() applies globally -- call it once at startup, not per promptpicocolors with Node.js built-in styleText -- requires Node.js 20.12+</red_flags>
\n<critical_reminders>
\n\n\nAll code must follow project conventions in CLAUDE.md (kebab-case, named exports, import ordering,
\nimport type, named constants)
(You MUST check isCancel() after EVERY prompt call -- skipping this causes silent crashes when users press Ctrl+C)
(You MUST exit the process after cancel() -- the cancel message prints but execution continues otherwise)
(You MUST exit with a NON-ZERO code on cancellation, taking the value from the CLI framework's exit-code table where one exists and using 130 where none does -- exiting 0 tells every caller the work succeeded)
\n(You MUST use group() with onCancel for multi-step flows -- it handles cancellation centrally so you don't check each prompt individually)
(You MUST call spinner.stop() before any other output -- overlapping spinner output with prompts or logs corrupts the terminal)
Failure to follow these rules will cause silent process hangs, corrupted terminal output, and runtime crashes on user cancellation.
\n</critical_reminders>
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