diff --git a/src/application/DeferredFileAuthorization.ts b/src/application/DeferredFileAuthorization.ts
deleted file mode 100644
index 1f0e3fde0..000000000
--- a/src/application/DeferredFileAuthorization.ts
+++ /dev/null
@@ -1,90 +0,0 @@
-import { projectPermissionFailure } from "./PermissionFailure.js";
-import { type AnalysisError } from "../domain/errors.js";
-import type { PermissionCapability } from "../domain/permissionPolicy.js";
-import { err, ok, type Result } from "../domain/result.js";
-import {
-  PermissionPathError,
-  type PermissionAuthority,
-} from "./PermissionAuthority.js";
-
-interface RootPermissionRequest {
-  readonly capability: PermissionCapability;
-  readonly roots: readonly string[];
-  readonly access: "read" | "write";
-  readonly operation: string;
-}
-
-/** Authorize one root-scoped operation and project policy path failures. */
-export const authorizeRootPermission = async (
-  authority: PermissionAuthority,
-  request: RootPermissionRequest,
-): Promise<Result<null, AnalysisError>> => {
-  const authorized = await authority.authorize(
-    {
-      capability: request.capability,
-      roots: request.roots,
-      executables: [],
-      environment_names: [],
-      network: "none",
-      mount: false,
-      operation_identity: `${request.operation}:${request.capability}:${request.roots.join(":")}`,
-    },
-    request.access,
-  );
-  return authorized.ok
-    ? ok(null)
-    : err(projectPermissionFailure(authorized.error));
-};
-
-export interface DeferredFileWriteAuthorization {
-  readonly authorizeWrite: () => Promise<Result<null, AnalysisError>>;
-}
-
-/** Authorize an existing file read and defer write authority until requested. */
-export const authorizeFileReadWithDeferredWrite = async (
-  authority: PermissionAuthority,
-  input: {
-    readonly path: string;
-    readonly readCapability: PermissionCapability;
-    readonly writeCapability: PermissionCapability;
-    readonly operation: string;
-  },
-): Promise<Result<DeferredFileWriteAuthorization, AnalysisError>> => {
-  const read = await authority.authorize(
-    {
-      capability: input.readCapability,
-      roots: [input.path],
-      executables: [],
-      environment_names: [],
-      network: "none",
-      mount: false,
-      operation_identity: `${input.operation}:${input.readCapability}:${input.path}`,
-    },
-    "read",
-  );
-  let writeAuthorization: Promise<Result<null, AnalysisError>> | undefined;
-  if (!read.ok) {
-    if (
-      !(read.error instanceof PermissionPathError) ||
-      read.error.reason !== "not_found"
-    )
-      return err(projectPermissionFailure(read.error));
-    writeAuthorization = authorizeRootPermission(authority, {
-      capability: input.writeCapability,
-      roots: [input.path],
-      access: "write",
-      operation: input.operation,
-    });
-    const authorized = await writeAuthorization;
-    if (!authorized.ok) return authorized;
-  }
-  return ok({
-    authorizeWrite: () =>
-      (writeAuthorization ??= authorizeRootPermission(authority, {
-        capability: input.writeCapability,
-        roots: [input.path],
-        access: "write",
-        operation: input.operation,
-      })),
-  });
-};
diff --git a/tests/fixtures/permissionAuthority.ts b/tests/fixtures/permissionAuthority.ts
deleted file mode 100644
index 533b35537..000000000
--- a/tests/fixtures/permissionAuthority.ts
+++ /dev/null
@@ -1,44 +0,0 @@
-import {
-  createPermissionAuthority,
-  type PermissionAuthority,
-} from "../../src/application/PermissionAuthority.js";
-import type {
-  PermissionCapability,
-  PermissionCeiling,
-  PermissionGrant,
-} from "../../src/domain/permissionPolicy.js";
-
-/** Build a canonical root-scoped authority with selected administrator grants. */
-export const permissionAuthorityForRoot = async (
-  root: string,
-  capabilities: readonly PermissionCapability[],
-  grantedCapabilities: readonly PermissionCapability[],
-): Promise<PermissionAuthority> => {
-  const ceilings = capabilities.map((capability) => scope(capability, root));
-  const grants = ceilings
-    .filter(({ capability }) => grantedCapabilities.includes(capability))
-    .map(administratorGrant);
-  const authority = await createPermissionAuthority(ceilings, grants);
-  if (!authority.ok) throw authority.error;
-  return authority.value;
-};
-
-const scope = (
-  capability: PermissionCapability,
-  root: string,
-): PermissionCeiling => ({
-  capability,
-  roots: [root],
-  executables: [],
-  environment_names: [],
-  network: "none",
-  mount: false,
-});
-
-const administratorGrant = (ceiling: PermissionCeiling): PermissionGrant => ({
-  ...ceiling,
-  grant_id: `administrator:${ceiling.capability}`,
-  lifetime: "administrator",
-  operation_identity: null,
-  expires_at: null,
-});