Run Knip against a JS/TS project to detect unused files, unused dependencies, unused exports, and unused class/enum members. Scoped to production code; tests are entry-point-aware via Knip's framework plugins. Use after a feature or route is deleted and the project still compiles, or when `package.json` has accumulated dependencies nobody can account for.
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Knip detects unused files, dependencies, exports, types, enum members, and class members in JS/TS projects per the Knip docs. Requires Node ≥ 20.19.0 (or Bun).
# Recommended: setup wizard (auto-detects framework)
npm init @knip/config
# Manual
npm install -D knip typescript @types/node
Add package.json script:
{
"scripts": {
"knip": "knip"
}
}
Per the Knip docs.
knip.json:
{
"$schema": "https://unpkg.com/knip@5/schema.json",
"entry": [
"src/index.ts",
"src/cli.ts",
"scripts/**/*.ts"
],
"project": ["src/**/*.{ts,tsx}"],
"ignore": ["src/**/*.generated.ts"],
"ignoreDependencies": [
"@types/node"
],
"ignoreExportsUsedInFile": true
}
Or knip.config.ts for typed config.
Entry vs project: entry = files Knip starts walking the import
graph from. project = the universe of files it considers reachable.
Anything in project not reached from entry is unused.
npx knip
Exit code: 0 if clean, non-zero if unused items found. Shows:
Unused files (3)
Unused dependencies (2)
Unused exports (12)
Unused exported types (4)
Unused exported enum members (1)
For framework-aware scanning, enable plugins (auto-detected by npm init @knip/config):
{
"next": {
"entry": ["next.config.{js,ts,cjs,mjs}", "app/**/page.{js,ts,tsx}"]
},
"playwright": {
"config": "playwright.config.ts",
"entry": ["e2e/**/*.spec.ts"]
}
}
Plugin list (Next.js, Remix, Astro, Vite, Storybook, Playwright, Jest, etc.) - see the Knip plugins page.
# Show only top 5 of each issue type - useful when first adopting
npx knip --max-show-issues 5
Per the Knip docs for overwhelming output.
# GitHub Actions
- name: Knip dead-code check
run: npx knip
Fails build on any new dead code. For brownfield rollout, baseline existing dead code first:
# Snapshot current findings; CI only fails on additions
npx knip --no-exit-code > knip-baseline.txt
| Reported as | True positive? | Action |
|---|---|---|
| Unused file | Usually yes | Delete |
| Unused dependency | Usually yes | npm uninstall |
| Unused export | Sometimes (public API) | Mark with JSDoc @public + tags: ["public"] config |
| Unused enum member | Usually yes | Delete |
| Unused class member | Sometimes (public API) | Same as unused export |
| Anti-pattern | Why it fails | Fix |
|---|---|---|
| Run without entry points | Everything looks orphaned | Always set entry (Step 2) |
| Treat "unused export" as "delete now" | Public library APIs flag as unused | Use tags: ["public"] for library packages |
| Skip framework plugins | Next.js page files look orphaned (Knip doesn't know they're routes) | Enable plugin (Step 4) |
| Block PRs from day 1 in brownfield | Hundreds of pre-existing unused; team disables tool | Baseline first (Step 6 alt path) |
| Auto-fix mode on first run | --fix deletes legitimate unused public exports | Manual review first; --fix after baseline clean |
import(\./${name}`)) cannot be statically tracked; Knip flags dependencies as unused even though they load at runtime. Use ignoreDependencies` for these cases.import "./polyfill") are tracked, but
reflection-heavy code (DI containers that instantiate via string
names) requires manual ignore entries.还没有评价。欢迎分享你的使用感受。
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Builds a CI gate that fails the build on **new** WCAG / a11y violations introduced by a PR while grandfathering pre-existing violations on a per-rule / per-page baseline. Aggregates verdicts from axe-core / pa11y / Lighthouse a11y / WAVE / IBM Equal Access scans. Use when a project has accumulated a11y debt and a strict "zero violations" gate would block every PR - the ratchet pattern lets the team ship while preventing regressions.
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Workflow skill that builds an A/B-test validity checklist from an experiment proposal, walking the canonical design-correctness gates - pre-registered OEC/power/guardrails, randomization unit + SRM check, assignment integrity, telemetry, peeking discipline, novelty/primacy, post-experiment SRM re-check - into a per-experiment checklist + sign-off form. Use when launching, auditing, or governing an experiment. For pitfall mechanics (guardrails, peeking) see experiment-results-interpreter's references; to read an already-valid result use experiment-results-interpreter; for per-SDK harness tests use experiment-sdk-testing - this gates DESIGN, not SDK code.
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The single install-flow skill: the reference contract for the PWA install flow (installability gate fields, `beforeinstallprompt` handshake, per-platform paths - Android WebAPK / iOS Share menu / Firefox no-op - and the `display-mode` post-install signal, in references/install-flow-reference.md) plus the build-an-X workflow that emits the Add-to-Home-Screen suite. Walks the four-stage timeline, emitting one test per gate cell per [web.dev/articles/install-criteria][install-criteria], the deferred-prompt → `prompt()` → `userChoice` chain per [web.dev/articles/customize-install][customize-install], the iOS Safari manual-metadata branch (`apple-touch-icon`) per [web.dev/learn/pwa/installation][learn-pwa], and the post-install `(display-mode: standalone)` MQ assertion. Output: a Playwright spec with per-stage cells plus a coverage matrix. Use when a PWA's manifest, icons, or install handler change, when install conversion drops at an unknown stage, or when triaging a flaky install assertion.
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Build-an-X workflow that uses an LLM to map existing tests to spec sections - given a spec doc + the test suite, the LLM identifies which tests cover which sections, surfaces uncovered sections (gap), and recommends specific tests to add. Output is a coverage matrix per spec ID. Scope is mapping tests that already exist and naming the gaps, not authoring tests for new acceptance criteria. Use when a spec doc and a test suite both exist but nobody can say which requirements are actually covered - before a release sign-off, an audit, or a decision about where to spend the next round of test effort.
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Generates tests from natural-language specs (acceptance criteria, user stories, requirements) using an LLM, with confidence scoring per test case (LLM self-assessment plus heuristics: assertion quality, naming, completeness), batching uncertain cases for human review, and integration with the team's existing test framework. Use when the user asks to generate unit tests from acceptance criteria, convert user stories to test cases, automate test creation from requirements, or augment a spec-driven test suite with AI-generated stubs that are then curated before merge.
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Configures Allure Report (test-runner adapter install, `allure-results` directory wiring, `categories.json` for failure classification, `history-trend.json` retention via the copy-history-between-runs pattern), runs the Allure CLI to convert `allure-results` to a static HTML site, and uploads the report as a CI artifact. Use when the team needs richer test reporting than JUnit XML - step-level attachments, per-test history, retry tracking, and severity / epic / feature labeling across framework-agnostic adapters (pytest, Jest, JUnit, TestNG, NUnit, Mocha). As a rich static HTML report generator, it is the open-source alternative to the sunset ExtentReports (JVM/.NET per-test HTML narrative); for hosted cross-run flakiness analytics rather than a static per-run report use currents-integration.
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