การพัฒนาแบบยึดลำต้นและการผสานรวมอย่างต่อเนื่อง

Trunk-based development (TBD) is a workflow where all developers integrate into a single shared branch (the trunk, usually main) very frequently, ideally several times a day.

It minimizes long-lived branches and the painful merges they create.

The longer a branch lives, the more it diverges from trunk and the harder the eventual merge. TBD flips this: by merging tiny changes constantly, conflicts stay small and integration pain nearly disappears.

• Faster feedback
• Fewer merge conflicts
• Always-releasable trunk

TBD does not forbid branches; it requires them to be short-lived (hours to a day or two). Create, review, merge, delete.

How do you merge incomplete features into trunk safely? Feature flags. Code ships disabled, then is enabled later via configuration without another deploy.

True CI means every push runs the full test suite against trunk. A green pipeline is the gate that keeps trunk releasable at all times.

A broken trunk blocks the whole team. Common safeguards:

• Required status checks before merge
• Merge queues that re-test against the latest trunk
• A culture of fixing or reverting fast

When many PRs land at once, each may pass alone but break together. A merge queue serializes merges and re-runs CI on the combined result before it hits trunk.

Smaller commits are easier to review, test, and revert. If something breaks, reverting one tiny change is trivial compared to untangling a giant feature branch.

Git Flow uses many long-lived branches (develop, release, hotfix). TBD favors one trunk plus ephemeral branches. TBD pairs naturally with continuous delivery; Git Flow suits scheduled, versioned releases.

TBD shines with strong automated testing and continuous deployment. Teams without solid CI may struggle, because the trunk's safety depends entirely on fast, reliable checks.

Feature flags accumulate. Once a feature is fully rolled out, remove its flag and the dead branch of code. Stale flags add complexity and quietly become a source of bugs.

Test your understanding of trunk-based development.

You learned trunk-based development: frequent integration into one trunk, short-lived branches, feature flags to hide unfinished work, strong CI and merge queues to keep trunk green, and small batches for low-risk reverts. TBD enables true continuous integration for fast-moving teams.