/**
 * Canonical-extensions scanner: enumerates authored project type roots and
 * source-qualified acquired packages beneath `agent_extensions/` or the
 * corresponding user-scope `agent_extensions/` root.
 *
 * Per Decision 5 of the workspace read-model design, scanner output is
 * occurrence-shaped. Each emitted occurrence carries the scanner-tier origin
 * discriminator (`canonical-axm` | `external-axm`) plus the extension type;
 * Phase 7 maps these into per-subject origin unions.
 *
 * Each occurrence carries structural fields the subject modules need for
 * cross-platform path handling — `pathSegments` (the absolute path split via
 * the `Path` service) and `subjectFile` (the canonical primary content file
 * for the subject type, e.g., `<dir>/SKILL.md` for skills) — plus a probed
 * `subjectFileExists` flag so subject modules do not hardcode presence.
 *
 * Scanner contract:
 *
 * - Public effect carries no `FileSystem | Path` requirement. Construction
 *   takes a deps record and returns an `Effect<ReadonlyArray<…>>`.
 * - Per-file partial failures (a directory we cannot enumerate) become
 *   diagnostic warnings, not errors. The error channel stays empty.
 * - WorkspaceMutations-root path-escape is checked at provider construction (Phase 9),
 *   not inside the scanner.
 *
 * The scanner avoids `fs.stat` and uses only `fs.exists` / `fs.readDirectory`
 * so it remains compatible with the fixture builder's in-memory `FileSystem`.
 * "Is this a directory" is decided by whether `readDirectory` returns
 * successfully; non-directory entries are silently ignored.
 */
import * as Effect from "effect/Effect";
import type * as FileSystem from "effect/FileSystem";
import type * as Path from "effect/Path";
import type { Diagnostics } from "../diagnostics.js";
import type { WorkspaceLayout } from "../../layout.js";
import type { CanonicalExtensionOccurrence } from "./types.js";
export interface CanonicalExtensionsScannerDeps {
    readonly fs: FileSystem.FileSystem;
    readonly path: Path.Path;
    readonly workspaceRoot: string;
    readonly diagnostics: Diagnostics;
    readonly layout: WorkspaceLayout;
}
/**
 * Closure helper: returns the dependency-closed scanner effect.
 */
export declare const makeCanonicalExtensionsScanner: (deps: CanonicalExtensionsScannerDeps) => Effect.Effect<ReadonlyArray<CanonicalExtensionOccurrence>>;
//# sourceMappingURL=canonical-extensions.d.ts.map