feat: extract exo utilities into @metamask/kernel-exo package

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: grypez

packages/kernel-agents/package.json

@@ -184,6 +184,7 @@
   "dependencies": {
     "@endo/eventual-send": "^1.3.4",
     "@metamask/kernel-errors": "workspace:^",
+    "@metamask/kernel-exo": "workspace:^",
     "@metamask/kernel-utils": "workspace:^",
     "@metamask/logger": "workspace:^",
     "@ocap/kernel-language-model-service": "workspace:^",

packages/kernel-agents/src/capabilities/discover.ts

@@ -1,5 +1,5 @@
 import { E } from '@endo/eventual-send';
-import type { DiscoverableExo, MethodSchema } from '@metamask/kernel-utils';
+import type { DiscoverableExo, MethodSchema } from '@metamask/kernel-exo';
 
 import type { CapabilityRecord, CapabilitySpec } from '../types.ts';
 

packages/kernel-agents/src/types/capability.ts

@@ -1,4 +1,4 @@
-import type { JsonSchema } from '@metamask/kernel-utils';
+import type { JsonSchema } from '@metamask/kernel-exo';
 
 export type Capability<Args extends Record<string, unknown>, Return = null> = (
   args: Args,

packages/kernel-agents/tsconfig.build.json

@@ -8,6 +8,7 @@
     "types": ["node"]
   },
   "references": [
+    { "path": "../kernel-exo/tsconfig.build.json" },
     { "path": "../kernel-language-model-service/tsconfig.build.json" },
     { "path": "../kernel-utils/tsconfig.build.json" },
     { "path": "../logger/tsconfig.build.json" }

packages/kernel-agents/tsconfig.json

@@ -6,6 +6,7 @@
     "types": ["vitest", "node", "ses"]
   },
   "references": [
+    { "path": "../kernel-exo" },
     { "path": "../kernel-language-model-service" },
     { "path": "../kernel-utils" },
     { "path": "../logger" },

packages/kernel-exo/package.json

@@ -0,0 +1,89 @@
+{
+  "name": "@metamask/kernel-exo",
+  "version": "0.0.0",
+  "private": true,
+  "description": "Exo creation utilities for the Ocap Kernel",
+  "homepage": "https://github.com/MetaMask/ocap-kernel/tree/main/packages/kernel-exo#readme",
+  "bugs": {
+    "url": "https://github.com/MetaMask/ocap-kernel/issues"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/MetaMask/ocap-kernel.git"
+  },
+  "type": "module",
+  "exports": {
+    ".": {
+      "import": {
+        "types": "./dist/index.d.mts",
+        "default": "./dist/index.mjs"
+      },
+      "require": {
+        "types": "./dist/index.d.cts",
+        "default": "./dist/index.cjs"
+      }
+    },
+    "./package.json": "./package.json"
+  },
+  "files": [
+    "dist/"
+  ],
+  "scripts": {
+    "build": "ts-bridge --project tsconfig.build.json --no-references --clean",
+    "build:docs": "typedoc",
+    "changelog:validate": "../../scripts/validate-changelog.sh @metamask/kernel-exo",
+    "clean": "rimraf --glob './*.tsbuildinfo' ./.eslintcache ./coverage ./dist ./.turbo ./logs",
+    "lint": "yarn lint:eslint && yarn lint:misc --check && yarn constraints && yarn lint:dependencies",
+    "lint:dependencies": "depcheck --quiet",
+    "lint:eslint": "eslint . --cache",
+    "lint:fix": "yarn lint:eslint --fix && yarn lint:misc --write && yarn constraints --fix && yarn lint:dependencies",
+    "lint:misc": "prettier --no-error-on-unmatched-pattern '**/*.json' '**/*.md' '**/*.html' '!**/CHANGELOG.old.md' '**/*.yml' '!.yarnrc.yml' '!merged-packages/**' --ignore-path ../../.gitignore --log-level error",
+    "publish:preview": "yarn npm publish --tag preview",
+    "test": "vitest run --config vitest.config.ts",
+    "test:clean": "yarn test --no-cache --coverage.clean",
+    "test:dev": "yarn test --mode development",
+    "test:verbose": "yarn test --reporter verbose",
+    "test:watch": "vitest --config vitest.config.ts",
+    "test:dev:quiet": "yarn test:dev --reporter @ocap/repo-tools/vitest-reporters/silent"
+  },
+  "dependencies": {
+    "@endo/exo": "^1.5.12",
+    "@endo/patterns": "^1.7.0",
+    "@metamask/kernel-utils": "workspace:^"
+  },
+  "devDependencies": {
+    "@arethetypeswrong/cli": "^0.17.4",
+    "@metamask/auto-changelog": "^5.3.0",
+    "@metamask/eslint-config": "^15.0.0",
+    "@metamask/eslint-config-nodejs": "^15.0.0",
+    "@metamask/eslint-config-typescript": "^15.0.0",
+    "@ocap/repo-tools": "workspace:^",
+    "@ts-bridge/cli": "^0.6.3",
+    "@ts-bridge/shims": "^0.1.1",
+    "@typescript-eslint/eslint-plugin": "^8.29.0",
+    "@typescript-eslint/parser": "^8.29.0",
+    "@typescript-eslint/utils": "^8.29.0",
+    "@vitest/eslint-plugin": "^1.6.5",
+    "depcheck": "^1.4.7",
+    "eslint": "^9.23.0",
+    "eslint-config-prettier": "^10.1.1",
+    "eslint-import-resolver-typescript": "^4.3.1",
+    "eslint-plugin-import-x": "^4.10.0",
+    "eslint-plugin-jsdoc": "^50.6.9",
+    "eslint-plugin-n": "^17.17.0",
+    "eslint-plugin-prettier": "^5.2.6",
+    "eslint-plugin-promise": "^7.2.1",
+    "prettier": "^3.5.3",
+    "rimraf": "^6.0.1",
+    "ses": "^1.14.0",
+    "turbo": "^2.5.6",
+    "typedoc": "^0.28.1",
+    "typescript": "~5.8.2",
+    "typescript-eslint": "^8.29.0",
+    "vite": "^7.3.0",
+    "vitest": "^4.0.16"
+  },
+  "engines": {
+    "node": ">=22"
+  }
+}

…es/kernel-utils/src/discoverable.test.ts …ages/kernel-exo/src/discoverable.test.tspackages/kernel-utils/src/discoverable.test.ts renamed to packages/kernel-exo/src/discoverable.test.ts packages/kernel-utils/src/discoverable.test.ts renamed to packages/kernel-exo/src/discoverable.test.ts

@@ -1,9 +1,9 @@
 import { makeExo } from '@endo/exo';
 import type { Methods } from '@endo/exo';
 import type { InterfaceGuard } from '@endo/patterns';
+import { mergeDisjointRecords } from '@metamask/kernel-utils';
 
 import { makeDefaultInterface } from './exo.ts';
-import { mergeDisjointRecords } from './merge-disjoint-records.ts';
 import type { MethodSchema } from './schema.ts';
 
 /**