build(kernel-test): Bundle test vats from typescript source

[grypez]

refactor(kernel-test): Convert vat source files to TypeScript

Summary

• Convert test vat source files from JavaScript to TypeScript with proper type annotations
• Add TestPowers type and unwrapTestLogger utility for test vats that need structured logging

Changes

ocap-kernel:

• Add buildRootObject parameter types

kernel-test:

• Rename all 38 vat source files from .js to .ts
• Add TypeScript type annotations to all vat source files
• Create test-powers.ts with TestPowers type and unwrapTestLogger utility
• Update vats to use TestPowers for typed logger access

cli:

• Update vat bundler glob pattern to include .ts files (still matches .js, too)

---

Note

Medium Risk
Mostly test and tooling changes, but it touches the CLI bundling glob and exports new public types from @metamask/ocap-kernel, which could affect downstream builds if assumptions about source extensions or type exports differ.

Overview
Test vats are now authored in TypeScript and bundled from .ts sources. The CLI bundleDir command expands its glob to include *.{js,ts} so vat bundles can be generated directly from TS entrypoints.

kernel-test vats were converted from .js to .ts with stronger typing and standardized logging. A new TestPowers type plus unwrapTestLogger helper centralize structured test logging, and vats add explicit parameter/service/baggage types (including durable Baggage use).

ocap-kernel exposes additional public types. VatPowers and Baggage are now exported from @metamask/ocap-kernel to support typed vat power signatures in tests.

^{Written by Cursor Bugbot for commit 30f557f. This will update automatically on new commits. Configure here.}

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	77.92% ⬇️ -9.81%	5989 / 7686
🔵	Statements	77.88% ⬇️ -9.72%	6086 / 7814
🔵	Functions	76.47% ⬇️ -9.61%	1547 / 2023
🔵	Branches	77.88% ⬇️ -6.09%	2163 / 2777

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
packages/cli/src/commands/bundle.ts	92.3% 🟰 ±0%	50% 🟰 ±0%	100% 🟰 ±0%	92.3% 🟰 ±0%	72
packages/kernel-test/src/test-powers.ts	0%	100%	0%	0%	23-25
packages/kernel-test/src/vats/async-generator-iterator-vat.ts	0%	100%	0%	0%	22-49
packages/kernel-test/src/vats/endowment-fetch.ts	0%	100%	0%	0%	15-36
packages/kernel-test/src/vats/logger-vat.ts	0%	0%	0%	0%	21-31
packages/kernel-test/src/vats/persistence-counter-vat.ts	0%	0%	0%	0%	23-51
packages/kernel-test/src/vats/persistence-worker-vat.ts	0%	0%	0%	0%	24-54
packages/kernel-test/src/vats/powers-vat.ts	0%	0%	0%	0%	19-21
packages/kernel-test/src/vats/subcluster-vat.ts	0%	0%	0%	0%	19-38
packages/ocap-kernel/src/index.ts	100% 🟰 ±0%	100% 🟰 ±0%	100% 🟰 ±0%	100% 🟰 ±0%
packages/ocap-kernel/src/types.ts	100% 🟰 ±0%	100% 🟰 ±0%	100% 🟰 ±0%	100% 🟰 ±0%

Generated in workflow #3549 for commit 30f557f by the Vitest Coverage Report Action

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.