Create B4Push Script

Generate a comprehensive before-push validation script for the current project.

Workflow

1. Analyze the project

Read package.json to understand:

• Package manager (pnpm/npm/yarn) - check lockfiles
• Available scripts: check, build, test, lint, format, typecheck
• Whether there's a doc site (look for doc/, docs/, website/ directories with their own package.json)
• Whether there are e2e tests (playwright, cypress)
• Whether there are data generation scripts (e.g., generate-* scripts in doc)

2. Determine steps

Common step patterns (adapt to project):

Step	Command	When to include
Code quality	pnpm check or pnpm lint && pnpm format	Always
TypeScript build	pnpm build	If build script exists
Unit tests	pnpm test	If test script exists
Doc data generation	cd doc && pnpm run generate-*	If doc site has generate scripts
Doc quality checks	cd doc && pnpm run check	If doc site has check script
Doc site build	cd doc && pnpm build	If doc site exists
E2E tests	Start server + run playwright	If e2e tests exist

For projects with e2e tests, add server lifecycle management (start, wait for ready, run tests, kill).

3. Create the shell script

Create scripts/run-b4push.sh based on the template in assets/run-b4push-template.sh.

Key patterns:

• set -euo pipefail for strict error handling
• FAILURES=() array - continues all steps even if some fail
• step(), pass(), fail() helper functions
• Subshell execution (cd "$DIR" && command) to isolate directory changes
• ROOT_DIR="$(cd "$(dirname "$0")/.." && pwd)" for reliable path resolution
• Summary section with elapsed time and failure list
• Exit 0 on success, exit 1 on any failure

Make the script executable: chmod +x scripts/run-b4push.sh

4. Add package.json script

Add to package.json:

{
  "scripts": {
    "b4push": "./scripts/run-b4push.sh"
  }
}

5. Create project-level b4push skill

Create .claude/skills/b4push/skill.md based on assets/b4push-skill-template.md.

Customize:

• Step list with project-specific descriptions
• Estimated duration
• Fix commands specific to the project (e.g., pnpm check:fix, cd doc && pnpm check:fix)

The skill should have user-invocable: true and allowed-tools: [Bash]. The description must include triggers for automatic invocation on big changes, PR completion, etc.

6. Test

Run pnpm b4push to verify all steps execute correctly. Fix any issues found.

Reference projects

These projects have working b4push setups:

• mdx-formatter: 6 steps (quality, build, test, doc data, doc quality, doc build), ~40s
• zmod: 9 steps including e2e with production server, ~3-4 min
• zpanels: Dual-track (quick 3 steps ~3-5 min, full 6+ steps with e2e ~10-15 min)