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knip-migration

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Dead-code / unused-dependency detection is migrating from the legacy `unimported` tool to `knip`, which requires each package to expose an explicit, minimal `package.json#exports` (no `./*` wildcard). Read this when adding a new package or migrating an existing one.

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Source SKILL.md: https://github.com/LedgerHQ/ledger-live/blob/HEAD/.agents/skills/knip-migration/SKILL.md

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Dead-code detection: explicit exports + knip (not unimported)

The repo is migrating dead-code / unused-dependency detection from the legacy unimported tool to knip, one package at a time. knip is configured centrally in the root knip.json (one workspaces entry per package).

Why this isn't just "swap the tool"

knip treats everything listed in a package's package.json#exports as an entry point. Today every package exports a ./* wildcard mapped to ./src/*.ts (via the @ledgerhq/source custom condition declared in tsconfig.base.json):

"./*": {
  "@ledgerhq/source": "./src/*.ts",
  "import": "./lib-es/*.js",
  "require": "./lib/*.js",
  "default": "./lib/*.js"
}

Because of this wildcard, knip considers every top-level src/*.ts file "used" and cannot detect unused ("zombie") top-level source files — the exact thing unimported caught (it ignored exports and diffed against a curated entry list). So real knip parity for a package requires replacing the ./* wildcard with explicit, minimal subpath exports that enumerate the package's true public API.

The few libs already pointed at knip (e.g. libs/env, libs/promise) still keep the ./* wildcard, so they are only partially migrated — do not copy them as the template.

New package = born migrated

A new package has no consumers, so it should start in the target state — no .unimportedrc.json:

  1. Explicit exports only. Enumerate the real public API; do not add a ./* wildcard. Mirror the . root entry per subpath, keeping the conditions: 
    "exports": {
  ".":        { "@ledgerhq/source": "./src/index.ts",  "import": "./lib-es/index.js",  "require": "./lib/index.js",  "default": "./lib/index.js" },
  "./logic":  { "@ledgerhq/source": "./src/logic.ts",  "import": "./lib-es/logic.js",  "require": "./lib/logic.js",  "default": "./lib/logic.js" },
  "./lib-es/*": "./lib-es/*.js",
  "./lib/*": "./lib/*.js",
  "./package.json": "./package.json"
}
  2. Register in knip.json — add a workspaces entry (entry, ignore, ignoreDependencies).
  3. Use knip, not unimported — add a script that runs knip scoped to the workspace: pnpm knip --directory <relative-hop-to-root> -W <workspace-path> (--directory is the hop back to the repo root — ../.. for libs/<x>, ../../.. for libs/coin-modules/<x>; -W is the workspace path from root).

Migrating an existing package off unimported

  1. Audit the real consumers of the package's deep imports.
  2. Replace the ./* wildcard export with explicit subpath exports (the legit public API).
  3. Refactor consumers that relied on now-removed arbitrary entry points.
  4. Switch the dead-code script unimported → knip, delete .unimportedrc.json, and verify a deliberately-unused top-level src file is now reported.

Start with leaf / low-dependency packages; ledger-live-common (largest surface) comes last.

Notes

  • unimported stays until a package reaches knip parity — don't bulk-delete it.
  • Unifying the script / nx-target name (unimported → knip-check) is tracked separately, so matching the surrounding package's existing script name is fine.

Reviewing

For a new package, flag either of these and point here:

  • a .unimportedrc.json or a script running the bare unimported binary ("unimported": "unimported") — it must use knip via a root knip.json workspaces entry; or
  • a ./* wildcard in package.json#exports — new packages must enumerate explicit exports so knip can detect zombie files.