Trunk-Based Development and Continuous Integration
Explore trunk-based development as a lightweight alternative to branch-heavy models, and learn how short-lived branches and feature flags enable true continuous integration for teams.
Trunk-Based Development and Continuous Integration is a free Git Advanced: Monorepo, Submodules & Workflows lesson on CoddyKit — lesson 4 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Git Advanced: Monorepo, Submodules & Workflows learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
What Is Trunk-Based Development?
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.
Why Frequent Integration Wins
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
Short-Lived Feature Branches
TBD does not forbid branches; it requires them to be short-lived (hours to a day or two). Create, review, merge, delete.
git switch -c add-rate-limit
# small focused change + tests
git push -u origin add-rate-limit
# open PR, review, merge same dayHiding Unfinished Work with Flags
How do you merge incomplete features into trunk safely? Feature flags. Code ships disabled, then is enabled later via configuration without another deploy.
if (flags.isEnabled('new-checkout')) {
renderNewCheckout();
} else {
renderLegacyCheckout();
}Continuous Integration in Practice
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.
Keeping Trunk Green
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
Merge Queues
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.
Small Batches, Small Risk
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 revert <bad-commit-sha>TBD vs. Git Flow
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.
When TBD Fits
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.
Retiring Stale Flags
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.
Quick Check
Test your understanding of trunk-based development.
Recap
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.
Frequently asked questions
Is the “Trunk-Based Development and Continuous Integration” lesson free?
Yes — the full text of “Trunk-Based Development and Continuous Integration” is free to read here on the web, and the Git Advanced: Monorepo, Submodules & Workflows course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Git Advanced: Monorepo, Submodules & Workflows course, upgrade to CoddyKit PRO.
What will I learn in “Trunk-Based Development and Continuous Integration”?
Explore trunk-based development as a lightweight alternative to branch-heavy models, and learn how short-lived branches and feature flags enable true continuous integration for teams. You practise Git Advanced: Monorepo, Submodules & Workflows with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Git Advanced: Monorepo, Submodules & Workflows?
No prior experience is required. Git Advanced: Monorepo, Submodules & Workflows on CoddyKit is structured for beginners through advanced learners; this is — lesson 4 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “Trunk-Based Development and Continuous Integration” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Git Advanced: Monorepo, Submodules & Workflows lesson?
Yes. Every Git Advanced: Monorepo, Submodules & Workflows lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- Git Flow vs. GitHub Flow
- GitLab Flow and Release Management
- Feature Branching and Hotfixes
- Trunk-Based Development and Continuous Integration