/*
<MODULE_CONTRACT>
<purpose>
RFC-0382: Kernel module registering kernel.cache.status and kernel.cache.clear
workspace commands. Provides cache diagnostics and explicit clearing.
</purpose>
<non-goals>
  <item>Do not implement cache storage — that lives in cache-layer.ts and sqlite-cache-layer.ts.</item>
  <item>Do not implement RFC-specific cache helpers — that lives in rfc-cache.ts.</item>
</non-goals>
</MODULE_CONTRACT>
<KEY_DECISIONS>
  <item>Module registers commands only — cache logic lives in the sibling modules.</item>
</KEY_DECISIONS>
<CHANGE_SUMMARY>
  <item>RFC-0382: initial implementation — cacheModule with status and clear commands.</item>
  <item>RFC-1097: step 6 — compass.migrate codemod run

Mechanical v1 to v2 header migration across the workspace: 942 files rewritten — CHANGE_SUMMARY windows collapsed into history, forbidden v1 blocks stripped, KEY_DECISIONS seeded from @ai-invariant comments (5 files) or TODO placeholders (103 files), blocks reordered to canonical order.</item>
  <item>RFC-1097: sweep — werkstatt-engine clean

Sweep batch 4: 73 Compass headers on headerless engine files (certification, component-runtime, isolation, evolution, testing), real KEY_DECISIONS on 75 files (kernel, cache, dht, swim, gitmesh, runtime), ~80 purpose expansions (CONTRACT-02/PURPOSE-02), non-goals on 13 CONTRACT-03 files, CS-07 history literal fix repo-wide (253 files). Policy: .template.ts/.template.astro excludedPaths. werkstatt-engine now 0 diagnostics.</item>
  <item>RFC-1173: declare mutatesState on all kernel commands — collectDeclarationDiagnostics emits error-severity MUTATES-STATE-DECLARED, command.manifest.validate is the blocking consumer in packages.check, sweep declares the flag on every command definition (factories hardcode false for read-only check specs)</item>
</CHANGE_SUMMARY>
*/

import type { ModuleExport } from "@warpgogol/werkstatt-shared/kernel";

export async function createCacheModule(): Promise<ModuleExport> {
  const { runKernelCacheStatus, runKernelCacheClear } = await import("./cache-handlers.ts");
  return {
    name: "cache",
    version: "0.1.0",

    declarations: [],
    commands: [
      {
        name: "kernel.cache.status",
        coverage: "operator" as const,
        mutatesState: false,
        modulePath: "packages/werkstatt-engine/src/kernel/cache/cache-module.ts",
        description:
          "RFC-0382: report the kernel cache state — availability, DB path, DB size, " +
          "namespace entry counts, and hit ratios. Use --json for machine-readable output.",
        scope: "workspace",
        flags: {},
        cacheable: false,
        execute: runKernelCacheStatus,
      },
      {
        name: "kernel.cache.clear",
        coverage: "operator" as const,
        modulePath: "packages/werkstatt-engine/src/kernel/cache/cache-module.ts",
        generates: [],
        description:
          "RFC-0382: clear the kernel cache. Pass --namespace to clear only one namespace " +
          "(e.g. rfc_entries); without --namespace, clears all namespaces.",
        scope: "workspace",
        mutatesState: true,
        writes: [".cache/kernel-cache.db"],
        cacheable: false,
        flags: {
          namespace: {
            kind: "string",
            description: "Clear only this namespace (e.g. rfc_entries). Without, clears all.",
          },
        },
        execute: runKernelCacheClear,
      },
    ],
    pipelines: [],
  };
}