diff --git a/turbo.json b/turbo.json
index 53ebd237f70..7cf1f5dca96 100644
--- a/turbo.json
+++ b/turbo.json
@@ -21,8 +21,7 @@
         "$TURBO_ROOT$/ui/scripts/build-plugin-stylesheet.mjs",
         "$TURBO_ROOT$/ui/scripts/check-dist-completeness.mjs",
         "$TURBO_ROOT$/ui/scripts/invoked-as.mjs",
-        "$TURBO_ROOT$/ui/scripts/vitest-invocation-guard.mjs",
-        "$TURBO_ROOT$/ui/packages/mobile/src/serviceWorkerSource.ts"
+        "$TURBO_ROOT$/ui/scripts/vitest-invocation-guard.mjs"
       ]
     },
     "test": {
@@ -71,8 +70,7 @@
         "$TURBO_ROOT$/ui/packages/cli/src/utils/issue-path.ts",
         "$TURBO_ROOT$/ui/packages/cli/src/utils/union-arm-diagnostics.ts",
         "$TURBO_ROOT$/ui/scripts/check-doc-component-types.mjs",
-        "$TURBO_ROOT$/ui/scripts/markdown-fence-scan.mjs",
-        "$TURBO_ROOT$/ui/packages/mobile/src/serviceWorkerSource.ts"
+        "$TURBO_ROOT$/ui/scripts/markdown-fence-scan.mjs"
       ]
     },
     "lint": {
diff --git a/ui/apps/console/turbo.json b/ui/apps/console/turbo.json
index da0afc30fdc..fb7794c1b07 100644
--- a/ui/apps/console/turbo.json
+++ b/ui/apps/console/turbo.json
@@ -13,7 +13,11 @@
         "!**/node_modules/**",
         "plugin.js",
         "plugin.d.ts"
-      ]
+      ],
+      "inputs": ["$TURBO_EXTENDS$", "$TURBO_ROOT$/ui/packages/mobile/src/serviceWorkerSource.ts"]
+    },
+    "type-check": {
+      "inputs": ["$TURBO_EXTENDS$", "$TURBO_ROOT$/ui/packages/mobile/src/serviceWorkerSource.ts"]
     }
   }
 }
diff --git a/ui/scripts/__tests__/helpers/turbo-inputs.ts b/ui/scripts/__tests__/helpers/turbo-inputs.ts
index 2218714cb12..2e0ea073615 100644
--- a/ui/scripts/__tests__/helpers/turbo-inputs.ts
+++ b/ui/scripts/__tests__/helpers/turbo-inputs.ts
@@ -21,7 +21,12 @@ import fs from 'node:fs';
 import path from 'node:path';
 
 import { uiRoot } from '../../ui-root.mjs';
-import { uiScopedTurboConfig, workspaceGlobs } from '../../workspace-root.mjs';
+import {
+  narrowTurboConfig,
+  turboConfigPath,
+  uiScopedTurboConfig,
+  workspaceGlobs,
+} from '../../workspace-root.mjs';
 
 /** Repo root: the objectui tree, standalone or as the monorepo's `ui/`. */
 export const repoRoot = uiRoot();
@@ -129,11 +134,109 @@ export function taskInputs(task: string, turbo: TurboTasks = liveTurboConfig()):
  * `$TURBO_ROOT$` exists at all.
  */
 export function rootAnchoredInputs(task: string, turbo: TurboTasks = liveTurboConfig()): string[] {
-  return taskInputs(task, turbo)
+  return anchoredOnly(taskInputs(task, turbo));
+}
+
+function anchoredOnly(inputs: readonly string[]): string[] {
+  return inputs
     .filter((entry) => entry.startsWith('$TURBO_ROOT$/'))
     .map((entry) => entry.slice('$TURBO_ROOT$/'.length));
 }
 
+// ── A package's own turbo.json (objectstack#29361) ───────────────────────────
+//
+// The root config is not the whole answer for a package that carries its own
+// `turbo.json` (a turbo Package Configuration, `extends: ["//"]`). For each
+// task it declares, turbo resolves that package's `inputs` like this:
+//
+//   - no `inputs` key on the package's task: the root task's list, unchanged;
+//   - an `inputs` list holding `$TURBO_EXTENDS$`: the root task's list plus the
+//     package's other entries;
+//   - an `inputs` list WITHOUT it: the package's entries REPLACE the root's,
+//     `$TURBO_DEFAULT$` included.
+//
+// Measured with turbo 2.11.10 on `@object-ui/console#build` (`--dry=json`):
+// 457 hashed files with `["$TURBO_EXTENDS$", <one $TURBO_ROOT$ file>]`, the
+// same 457 with the marker written last instead of first, and 3 with the
+// marker dropped. A guard that read only the root list would wave a replacing
+// list through and would red an extending one, so the guards read the list
+// turbo resolves for the package they judge.
+
+/** Turbo's marker: "the root task's list, plus these". */
+export const TURBO_EXTENDS = '$TURBO_EXTENDS$';
+
+/**
+ * A package's own `turbo.json`, narrowed to this tree like the root's
+ * (`$TURBO_ROOT$/ui/x` read as `$TURBO_ROOT$/x`), or `null` when it has none.
+ */
+export function packageTurboConfig(pkgDir: string): TurboTasks | null {
+  const file = path.join(pkgDir, 'turbo.json');
+  if (!fs.existsSync(file)) return null;
+  const config = JSON.parse(fs.readFileSync(file, 'utf8')) as TurboTasks;
+  const prefix = path.relative(path.dirname(turboConfigPath(repoRoot)), repoRoot);
+  return narrowTurboConfig(config, prefix ? `${prefix.split(path.sep).join('/')}/` : '');
+}
+
+/**
+ * The `inputs` turbo hashes ONE package's task from: the root task's list,
+ * resolved through the package's own `turbo.json` as described above.
+ *
+ * A root `<package>#<task>` override for the package throws: turbo has a
+ * resolution rule for it too, and this reader does not implement it. Reading
+ * the generic task instead would judge the package against a list turbo does
+ * not hash, so teach this function first.
+ */
+export function packageTaskInputs(
+  task: string,
+  pkgDir: string,
+  turbo: TurboTasks = liveTurboConfig(),
+  own: TurboTasks | null = packageTurboConfig(pkgDir),
+): string[] {
+  const manifest = path.join(pkgDir, 'package.json');
+  const name = fs.existsSync(manifest)
+    ? (JSON.parse(fs.readFileSync(manifest, 'utf8')) as { name?: string }).name
+    : undefined;
+  if (name && turbo.tasks?.[`${name}#${task}`]) {
+    throw new Error(
+      `turbo.json declares \`${name}#${task}\`, and packageTaskInputs() does not resolve a root ` +
+        `<package>#<task> override. Teach it turbo's rule for that shape rather than reading the ` +
+        `generic \`${task}\` task in its place.`,
+    );
+  }
+  const declared = own?.tasks?.[task]?.inputs;
+  if (declared === undefined) return taskInputs(task, turbo);
+  if (declared.includes(TURBO_EXTENDS)) {
+    return [...taskInputs(task, turbo), ...declared.filter((entry) => entry !== TURBO_EXTENDS)];
+  }
+  if (declared.length === 0) {
+    throw new Error(`${rel(path.join(pkgDir, 'turbo.json'))} \`${task}\` declares an empty \`inputs\` list`);
+  }
+  return declared;
+}
+
+/** `packageTaskInputs`, `$TURBO_ROOT$`-anchored entries only, as repo-relative globs. */
+export function packageRootAnchoredInputs(
+  task: string,
+  pkgDir: string,
+  turbo: TurboTasks = liveTurboConfig(),
+  own: TurboTasks | null = packageTurboConfig(pkgDir),
+): string[] {
+  return anchoredOnly(packageTaskInputs(task, pkgDir, turbo, own));
+}
+
+/**
+ * The `$TURBO_ROOT$` entries a package's OWN `turbo.json` writes for a task,
+ * as repo-relative globs: the population the phantom-input and earned-input
+ * assertions hold to that package's program, beside the root task's list.
+ */
+export function packageOwnRootAnchoredInputs(
+  task: string,
+  pkgDir: string,
+  own: TurboTasks | null = packageTurboConfig(pkgDir),
+): string[] {
+  return anchoredOnly(own?.tasks?.[task]?.inputs ?? []);
+}
+
 /**
  * A turbo input glob as a regular expression.
  *
diff --git a/ui/scripts/__tests__/turbo-build-inputs.test.ts b/ui/scripts/__tests__/turbo-build-inputs.test.ts
index f571f4c81ab..2af7eef5cee 100644
--- a/ui/scripts/__tests__/turbo-build-inputs.test.ts
+++ b/ui/scripts/__tests__/turbo-build-inputs.test.ts
@@ -5,6 +5,9 @@ import {
   globToRegExp,
   packagesWithScript,
   rel,
+  packageOwnRootAnchoredInputs,
+  packageRootAnchoredInputs,
+  packageTaskInputs,
   repoFilesOnDisk,
   rootAnchoredInputs,
   taskInputs,
@@ -79,7 +82,14 @@ const INPUTS_NOT_DERIVABLE: ReadonlyMap<string, string> = new Map();
 // ── The derivation, computed once ───────────────────────────────────────────
 
 const PACKAGES = packagesWithScript(TASK);
-const DERIVED = PACKAGES.map((pkg) => ({ ...pkg, program: buildProgramFor(pkg) }));
+const DERIVED = PACKAGES.map((pkg) => ({
+  ...pkg,
+  program: buildProgramFor(pkg),
+  // What turbo hashes THIS package's task from: the root task's list, resolved
+  // through the package's own turbo.json when it has one (objectstack#29361).
+  inputs: packageRootAnchoredInputs(TASK, pkg.dir),
+  ownInputs: packageOwnRootAnchoredInputs(TASK, pkg.dir),
+}));
 const ROOT_INPUTS = rootAnchoredInputs(TASK);
 const MATCHERS = ROOT_INPUTS.map((glob) => ({ glob, re: globToRegExp(glob) }));
 
@@ -105,17 +115,17 @@ describe('turbo `build` inputs cover every out-of-package file (objectui#4185)',
       (pkg) => [pkg.name, pkg] as const,
     ),
   )('%s', (_name, pkg) => {
-    const uncovered = pkg.program.outside.filter(
-      (file) => !MATCHERS.some(({ re }) => re.test(file)),
-    );
+    const matchers = pkg.inputs.map((glob) => globToRegExp(glob));
+    const uncovered = pkg.program.outside.filter((file) => !matchers.some((re) => re.test(file)));
     expect(
       uncovered,
       `${pkg.name}'s build program reads ${uncovered.join(', ')} from outside ${rel(pkg.dir)}, ` +
-        `and turbo hashes ${TASK} from ${JSON.stringify(ROOT_INPUTS)} plus the package ` +
+        `and turbo hashes its ${TASK} from ${JSON.stringify(pkg.inputs)} plus the package ` +
         `directory. Turbo will replay a stale verdict — and hand the stale dist/ to every task ` +
         `that depends on it — when ${uncovered.length === 1 ? 'that file changes' : 'those files change'}. ` +
         `Add ${uncovered.map((file) => `"$TURBO_ROOT$/${file}"`).join(', ')} to turbo.json's ` +
-        `\`${TASK}\` inputs.`,
+        `\`${TASK}\` inputs, or to the package's own turbo.json \`${TASK}\` inputs beside ` +
+        `"$TURBO_EXTENDS$" when only this package reads it.`,
     ).toEqual([]);
   });
 
@@ -133,6 +143,16 @@ describe('turbo `build` inputs cover every out-of-package file (objectui#4185)',
           `hashing nothing while reading as coverage — fix the glob or delete the entry.`,
       ).toBe(true);
     }
+    for (const pkg of DERIVED) {
+      for (const glob of pkg.ownInputs) {
+        const re = globToRegExp(glob);
+        expect(
+          [...onDisk].some((file) => re.test(file)),
+          `${rel(pkg.dir)}/turbo.json \`${TASK}\` input "$TURBO_ROOT$/${glob}" matches no file in ` +
+            `the repo. It is hashing nothing while reading as coverage — fix the glob or delete the entry.`,
+        ).toBe(true);
+      }
+    }
   });
 
   /**
@@ -151,6 +171,18 @@ describe('turbo `build` inputs cover every out-of-package file (objectui#4185)',
           `INPUTS_NOT_DERIVABLE.`,
       ).not.toHaveLength(0);
     }
+    // A package's own entry is earned by THAT package's program: it hashes
+    // into no other package's task, so no other program can earn it.
+    for (const pkg of DERIVED) {
+      for (const glob of pkg.ownInputs) {
+        const re = globToRegExp(glob);
+        expect(
+          pkg.program.outside.filter((file) => re.test(file)),
+          `${rel(pkg.dir)}/turbo.json \`${TASK}\` input "$TURBO_ROOT$/${glob}" is not required by ` +
+            `${pkg.name}'s build program any more. Delete it.`,
+        ).not.toHaveLength(0);
+      }
+    }
   });
 
   /**
@@ -169,6 +201,24 @@ describe('turbo `build` inputs cover every out-of-package file (objectui#4185)',
     ).toContain('$TURBO_DEFAULT$');
   });
 
+  /**
+   * The same worry, one level down: a package's own turbo.json whose `build`
+   * inputs leave out "$TURBO_EXTENDS$" REPLACES the root list, and with it
+   * "$TURBO_DEFAULT$" (objectstack#29361 measured `@object-ui/console#build`
+   * fall from 457 hashed files to 3).
+   */
+  it.each(PACKAGES.map((pkg) => [pkg.name, pkg] as const))(
+    "%s's resolved build inputs still carry $TURBO_DEFAULT$",
+    (_name, pkg) => {
+      expect(
+        packageTaskInputs(TASK, pkg.dir),
+        `${rel(pkg.dir)}/turbo.json replaces turbo.json's \`${TASK}\` inputs without ` +
+          `"$TURBO_DEFAULT$", so the package's own source stops being hashed. Add ` +
+          `"$TURBO_EXTENDS$" to its list.`,
+      ).toContain('$TURBO_DEFAULT$');
+    },
+  );
+
   /**
    * A `pnpm --filter <pkg> build` segment inside a `prebuild` is a task-GRAPH
    * fact, not an inputs fact: the right answer to "this build needs that
diff --git a/ui/scripts/__tests__/turbo-inputs-package-config.test.ts b/ui/scripts/__tests__/turbo-inputs-package-config.test.ts
new file mode 100644
index 00000000000..26072885667
--- /dev/null
+++ b/ui/scripts/__tests__/turbo-inputs-package-config.test.ts
@@ -0,0 +1,128 @@
+import { afterAll, describe, expect, it } from 'vitest';
+import fs from 'node:fs';
+import os from 'node:os';
+import path from 'node:path';
+import {
+  TURBO_EXTENDS,
+  packageOwnRootAnchoredInputs,
+  packageRootAnchoredInputs,
+  packageTaskInputs,
+  repoRoot,
+  type TurboTasks,
+} from './helpers/turbo-inputs';
+
+/**
+ * objectstack#29361 — the turbo-input guards read the inputs turbo resolves
+ * for the package a row judges, not the root task's list alone. These pin the
+ * reader against fixtures for each of turbo's three resolutions, and against
+ * the live tree for the one package that carries its own turbo.json today.
+ */
+
+const ROOT: TurboTasks = {
+  tasks: {
+    build: { inputs: ['$TURBO_DEFAULT$', '$TURBO_ROOT$/scripts/shared.ts'] },
+    'type-check': { inputs: ['$TURBO_DEFAULT$', '$TURBO_ROOT$/tsconfig.json'] },
+  },
+};
+const OWN_ONLY = '$TURBO_ROOT$/packages/other/src/only-here.ts';
+
+const scratch = fs.mkdtempSync(path.join(os.tmpdir(), 'turbo-inputs-package-config-'));
+afterAll(() => fs.rmSync(scratch, { recursive: true, force: true }));
+
+/** A scratch package directory holding a `package.json` with this name. */
+function scratchPackage(name: string): string {
+  const dir = fs.mkdtempSync(path.join(scratch, 'pkg-'));
+  fs.writeFileSync(path.join(dir, 'package.json'), JSON.stringify({ name }));
+  return dir;
+}
+
+describe('packageTaskInputs: turbo resolves a package task through its own turbo.json', () => {
+  it('a package with no turbo.json reads the root task list unchanged', () => {
+    const dir = scratchPackage('@fixture/plain');
+    expect(packageTaskInputs('build', dir, ROOT, null)).toEqual(ROOT.tasks!.build.inputs);
+  });
+
+  it('a package task that declares no inputs inherits the root task list', () => {
+    const dir = scratchPackage('@fixture/outputs-only');
+    const own: TurboTasks = { tasks: { build: {} } };
+    expect(packageTaskInputs('build', dir, ROOT, own)).toEqual(ROOT.tasks!.build.inputs);
+  });
+
+  it('an input list holding $TURBO_EXTENDS$ is the root list plus the package entries', () => {
+    const dir = scratchPackage('@fixture/extends');
+    const own: TurboTasks = { tasks: { build: { inputs: [TURBO_EXTENDS, OWN_ONLY] } } };
+    expect(packageTaskInputs('build', dir, ROOT, own)).toEqual([
+      '$TURBO_DEFAULT$',
+      '$TURBO_ROOT$/scripts/shared.ts',
+      OWN_ONLY,
+    ]);
+    expect(packageRootAnchoredInputs('build', dir, ROOT, own)).toEqual([
+      'scripts/shared.ts',
+      'packages/other/src/only-here.ts',
+    ]);
+    expect(packageOwnRootAnchoredInputs('build', dir, own)).toEqual(['packages/other/src/only-here.ts']);
+  });
+
+  it('the marker extends wherever it sits in the list, as turbo reads it', () => {
+    const dir = scratchPackage('@fixture/extends-last');
+    const own: TurboTasks = { tasks: { build: { inputs: [OWN_ONLY, TURBO_EXTENDS] } } };
+    expect(packageRootAnchoredInputs('build', dir, ROOT, own)).toEqual([
+      'scripts/shared.ts',
+      'packages/other/src/only-here.ts',
+    ]);
+  });
+
+  it('an input list without the marker replaces the root list: the root entries stop counting', () => {
+    const dir = scratchPackage('@fixture/replaces');
+    const own: TurboTasks = { tasks: { build: { inputs: [OWN_ONLY] } } };
+    expect(packageTaskInputs('build', dir, ROOT, own)).toEqual([OWN_ONLY]);
+    expect(packageRootAnchoredInputs('build', dir, ROOT, own)).not.toContain('scripts/shared.ts');
+  });
+
+  it("one package's turbo.json leaves another package's row and its other tasks alone", () => {
+    const own: TurboTasks = { tasks: { build: { inputs: [TURBO_EXTENDS, OWN_ONLY] } } };
+    const withOwn = scratchPackage('@fixture/with-own');
+    const other = scratchPackage('@fixture/other');
+    expect(packageRootAnchoredInputs('build', other, ROOT, null)).toEqual(['scripts/shared.ts']);
+    expect(packageRootAnchoredInputs('type-check', withOwn, ROOT, own)).toEqual(['tsconfig.json']);
+  });
+
+  it('an empty replacing list throws instead of reading as a list that covers nothing', () => {
+    const dir = scratchPackage('@fixture/empty');
+    const own: TurboTasks = { tasks: { build: { inputs: [] } } };
+    expect(() => packageTaskInputs('build', dir, ROOT, own)).toThrow(/empty `inputs` list/);
+  });
+
+  it('a root <package>#<task> override throws: the reader does not resolve that shape', () => {
+    const dir = scratchPackage('@fixture/overridden');
+    const root: TurboTasks = {
+      tasks: { ...ROOT.tasks, '@fixture/overridden#build': { inputs: ['$TURBO_DEFAULT$'] } },
+    };
+    expect(() => packageTaskInputs('build', dir, root, null)).toThrow(/does not resolve a root/);
+  });
+});
+
+describe('the live tree: the Service Worker generator hashes into the Console tasks only', () => {
+  const GENERATOR = 'packages/mobile/src/serviceWorkerSource.ts';
+  const consoleDir = path.join(repoRoot, 'apps/console');
+  const coreDir = path.join(repoRoot, 'packages/core');
+
+  it.each(['build', 'type-check'])(
+    "@object-ui/console's %s reads the root list plus the generator, narrowed to this tree",
+    (task) => {
+      const resolved = packageRootAnchoredInputs(task, consoleDir);
+      expect(resolved).toContain(GENERATOR);
+      expect(resolved).toContain('scripts/vite-*.ts');
+      expect(packageTaskInputs(task, consoleDir)).toContain('$TURBO_DEFAULT$');
+    },
+  );
+
+  it.each(['build', 'type-check'])("another package's %s does not hash the generator", (task) => {
+    expect(packageRootAnchoredInputs(task, coreDir)).not.toContain(GENERATOR);
+  });
+
+  it("every package's test still hashes it: the root ui vitest config loads the Console's vite.config.ts", () => {
+    expect(packageRootAnchoredInputs('test', coreDir)).toContain(GENERATOR);
+    expect(packageRootAnchoredInputs('test', consoleDir)).toContain(GENERATOR);
+  });
+});
diff --git a/ui/scripts/__tests__/turbo-type-check-inputs.test.ts b/ui/scripts/__tests__/turbo-type-check-inputs.test.ts
index 17e511cf7d1..0a1a552e0f3 100644
--- a/ui/scripts/__tests__/turbo-type-check-inputs.test.ts
+++ b/ui/scripts/__tests__/turbo-type-check-inputs.test.ts
@@ -5,6 +5,8 @@ import {
   rel,
   repoFilesOnDisk,
   liveTurboConfig,
+  packageOwnRootAnchoredInputs,
+  packageRootAnchoredInputs,
   rootAnchoredInputs,
 } from './helpers/turbo-inputs';
 import { outOfPackageFiles } from './helpers/tsc-program';
@@ -131,7 +133,14 @@ const INPUTS_NOT_DERIVABLE: ReadonlyMap<string, string> = new Map([
 // ── The derivation, computed once ────────────────────────────────────────────
 
 const PACKAGES = packagesWithScript(TASK);
-const DERIVED = PACKAGES.map((pkg) => ({ ...pkg, outside: outOfPackageFiles(pkg.dir, pkg.script) }));
+const DERIVED = PACKAGES.map((pkg) => ({
+  ...pkg,
+  outside: outOfPackageFiles(pkg.dir, pkg.script),
+  // What turbo hashes THIS package's task from: the root task's list, resolved
+  // through the package's own turbo.json when it has one (objectstack#29361).
+  inputs: packageRootAnchoredInputs(TASK, pkg.dir),
+  ownInputs: packageOwnRootAnchoredInputs(TASK, pkg.dir),
+}));
 const ROOT_INPUTS = rootAnchoredInputs(TASK, liveTurboConfig());
 const MATCHERS = ROOT_INPUTS.map((glob) => ({ glob, re: globToRegExp(glob) }));
 
@@ -155,14 +164,16 @@ describe('turbo `type-check` inputs cover every out-of-package file (objectui#35
   it.each(DERIVED.filter((pkg) => pkg.outside.length > 0).map((pkg) => [pkg.name, pkg] as const))(
     '%s',
     (_name, pkg) => {
-      const uncovered = pkg.outside.filter((file) => !MATCHERS.some(({ re }) => re.test(file)));
+      const matchers = pkg.inputs.map((glob) => globToRegExp(glob));
+      const uncovered = pkg.outside.filter((file) => !matchers.some((re) => re.test(file)));
       expect(
         uncovered,
         `${pkg.name}'s type-check program reads ${uncovered.join(', ')} from outside ` +
-          `${rel(pkg.dir)}, and turbo hashes ${TASK} from ${JSON.stringify(ROOT_INPUTS)} plus the ` +
+          `${rel(pkg.dir)}, and turbo hashes its ${TASK} from ${JSON.stringify(pkg.inputs)} plus the ` +
           `package directory. Turbo will replay a stale verdict when ${uncovered.length === 1 ? 'that file changes' : 'those files change'}. ` +
           `Add ${uncovered.map((file) => `"$TURBO_ROOT$/${file}"`).join(', ')} to turbo.json's ` +
-          `\`${TASK}\` inputs.`,
+          `\`${TASK}\` inputs, or to the package's own turbo.json \`${TASK}\` inputs beside ` +
+          `"$TURBO_EXTENDS$" when only this package reads it.`,
       ).toEqual([]);
     },
   );
@@ -182,6 +193,16 @@ describe('turbo `type-check` inputs cover every out-of-package file (objectui#35
           `hashing nothing while reading as coverage — fix the glob or delete the entry.`,
       ).toBe(true);
     }
+    for (const pkg of DERIVED) {
+      for (const glob of pkg.ownInputs) {
+        const re = globToRegExp(glob);
+        expect(
+          [...onDisk].some((file) => re.test(file)),
+          `${rel(pkg.dir)}/turbo.json \`${TASK}\` input "$TURBO_ROOT$/${glob}" matches no file in ` +
+            `the repo. It is hashing nothing while reading as coverage — fix the glob or delete the entry.`,
+        ).toBe(true);
+      }
+    }
   });
 
   /**
@@ -200,5 +221,17 @@ describe('turbo `type-check` inputs cover every out-of-package file (objectui#35
           `INPUTS_NOT_DERIVABLE.`,
       ).not.toHaveLength(0);
     }
+    // A package's own entry is earned by THAT package's program: it hashes
+    // into no other package's task, so no other program can earn it.
+    for (const pkg of DERIVED) {
+      for (const glob of pkg.ownInputs) {
+        const re = globToRegExp(glob);
+        expect(
+          pkg.outside.filter((file) => re.test(file)),
+          `${rel(pkg.dir)}/turbo.json \`${TASK}\` input "$TURBO_ROOT$/${glob}" is not required by ` +
+            `${pkg.name}'s type-check program any more. Delete it.`,
+        ).not.toHaveLength(0);
+      }
+    }
   });
 });