[comandanto]

What this changes

Closes #17.

• Adds @vitest/coverage-v8 (v5.0.5) to devDependencies to match vitest.
• Configures test.coverage in vitest.config.ts targeting src/**/*.ts (excluding src/main.ts entrypoint and declaration files) with minimum thresholds:
  • lines: 95% (baseline: 95.49%)
  • statements: 90% (baseline: 92.91%)
  • functions: 90% (baseline: 93.58%)
  • branches: 85% (baseline: 85.97%)
• Adds "test:coverage": "vitest run --coverage" script in package.json.
• Integrates npm run test:coverage into .github/workflows/ci.yml.

Why this belongs in this repository

Ensures that pull requests cannot silently regress coverage on critical execution paths (e.g. policy rules, transaction verification, session authentication), failing CI automatically if measured coverage drops below the enforced thresholds.

Other repo API/ABI impact

None. No runtime dependency or API surface changes.

Tests and evidence

• Ran npm run test:coverage locally: generated complete coverage report and passed all thresholds (113 tests passing).
• Ran npm run check and npm run build: both exit 0 cleanly.
• Verified negative case locally by setting lines: 99: vitest correctly reported threshold failure and exited with code 1 before reverting to 95.

Security/privacy and Stellar impact

None. No secrets, credentials, or Soroban smart contract interactions affected.