# 🤖 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.

package.json

@@ -44,7 +44,6 @@
     "test:ci": "npm run test:ci --workspaces --if-present && npm run test:scripts && npm run test:sea-launch",
     "test:scripts": "vitest run --config ./scripts/tests/vitest.config.ts",
     "test:sea-launch": "vitest run sea/sea-launch.test.js",
-    "posttest": "npm run build",
     "test:always_passing_evals": "vitest run --config evals/vitest.config.ts",
     "test:all_evals": "cross-env RUN_EVALS=1 vitest run --config evals/vitest.config.ts",
     "test:e2e": "cross-env VERBOSE=true KEEP_OUTPUT=true npm run test:integration:sandbox:none",