Automating the gate
A continuous integration pipeline runs an automated sequence of checks on every push or pull request. For a frontend it typically installs dependencies, lints, type checks, runs tests, and produces a build. If any stage fails, the change is blocked before it can merge.
- Each stage runs in a clean, reproducible environment.
- Stages run in order, and an early failure stops the rest.
- A green pipeline is the contract for merging safely.
Ordering for fast feedback
Order stages cheapest and most likely to fail first so developers learn quickly. Lint and type check finish in seconds and catch many mistakes, so they run before the slower test and build stages.
- Fast first: lint and type check fail in seconds.
- Then tests: unit and integration before slow end to end.
- Cache: reuse installed dependencies to cut repeated time.
The pipeline also enforces consistency: it runs the same checks for everyone, removing the it works on my machine excuse. Treat a red pipeline as a stop signal, fix the cause rather than rerunning until it flukes green, and keep the suite fast so the gate stays a help rather than a bottleneck.
Key idea
A CI pipeline runs install, lint, type check, test, and build on every change, ordered fast first to gate what merges.