Change detection

arx can narrow inspection and planning to changed files or changed components. That is useful in pull requests, preview environments, and incremental review workflows.

Commands that support change detection

• arx plan
• arx component

Use those commands when you want to focus on the parts of the platform graph that were touched by a branch, commit range, or explicit file list.

Available flags

Flag	Purpose
--changed	Enable change-aware filtering based on git state
--base <ref>	Set the base ref used for comparison
--head <ref>	Set the head ref used for comparison
--files <path,...>	Override git diff resolution with an explicit file list
--uncommitted	Scope detection to uncommitted changes
--untracked	Scope detection to untracked files

Pull request review flow

arx component \
  --intent examples/intent.yaml \
  --config-dir assets/config/compositions \
  --changed \
  --base main \
  --long

arx plan \
  --intent examples/intent.yaml \
  --config-dir assets/config/compositions \
  --changed \
  --base main \
  --output /tmp/pr-plan.json

Explicit file lists

When your CI system already knows the changed files, pass them directly instead of asking arx to compute the diff:

arx plan \
  --intent examples/intent.yaml \
  --config-dir assets/config/compositions \
  --files examples/services/web-app/component.yaml,examples/intent.yaml \
  --output /tmp/filtered-plan.json

Local development flow

For uncommitted work in a repository checkout:

arx component \
  --intent examples/intent.yaml \
  --config-dir assets/config/compositions \
  --changed \
  --uncommitted

Use change detection to reduce noise during review, not to hide full-environment validation when you need a canonical plan for release.