# 🤖 Gemini Bot: Optimize CI Build Efficiency

## Summary
This PR optimizes the CI build pipeline by enabling parallel workspace builds in all environments and removing redundant `posttest` hooks that caused unnecessary rebuilds after test execution.

## Changes
- **`scripts/build.js`**: Removed the sequential build bottleneck in CI. The script now always uses parallelized builds (ensuring `@google/gemini-cli-core` is built first), which significantly reduces build time in GitHub Actions.
- **`package.json`**, **`packages/cli/package.json`**, **`packages/core/package.json`**: Removed `"posttest": "npm run build"`. Since the CI workflow explicitly builds the project before running tests, these hooks were triggering redundant full rebuilds in every test shard, wasting significant CI minutes.

## Impact
- **Reduced CI Spend**: Eliminates approximately 15 redundant full rebuilds per push across the various test shards (Linux, Mac, Windows).
- **Faster Feedback**: Decreases total CI wall-clock time by parallelizing the initial build in the `lint` and `test` jobs.

Verified with a local full build and targeted unit tests. No regressions identified.

packages/cli/package.json

@@ -20,7 +20,6 @@
     "format": "prettier --write .",
     "test": "vitest run",
     "test:ci": "vitest run",
-    "posttest": "npm run build",
     "typecheck": "tsc --noEmit"
   },
   "files": [