Claude changes code
CodeMD detects each modified or newly created function as you work.
Focused testing for AI-written code
Test every change.
Only where it matters.
When Claude changes a function, CodeMD follows its call graph to find the existing tests that matter—or creates the missing tests—then runs that focused set before and after commit.
Start with the CodeMD VS Code extension.
CodeMD maps the impact
The call graph reveals callers, dependencies, and the behavior that could be affected.
Relevant tests are selected
Existing tests are found first. When coverage is missing, CodeMD creates an appropriate test.
The focused tests run
Run them pre-commit in VS Code and post-commit locally or with supported online coding-agent APIs.
Why focused testing
Confidence without running everything.
CodeMD uses the actual change and its call-graph relationships to keep the test scope relevant. You get fast feedback while protecting the behavior around the changed function.
Coverage follows the change
Every modified and new function gets attention as soon as Claude touches it, helping prevent coverage gaps from becoming future defects.
Reuse before creating
CodeMD looks for the most relevant existing test first. It creates a new test only when the change needs coverage that is not already there.
Test the interaction, too
Testing does not stop at one function. Call-graph context helps verify how the change interacts with callers and connected behavior.
The right test for the risk
More than unit tests.
CodeMD can create the form of test that best matches the changed behavior and its place in the system.
Unit
Checks the function's behavior in isolation.
Contract
Protects expectations between components.
Integration
Verifies connected functions work together.
Regression
Preserves behavior a change could break.
Risk-based
Targets the highest-impact call paths first.
Before and after commit
Feedback where you already work.
Use the CodeMD VS Code extension to run relevant tests before the code is committed. After commit, run the same focused approach locally or through supported online coding-agent APIs.
This gives developers immediate feedback during implementation and fresh verification after the change enters repository history.
Install the free extensionChange verificationComplete
Changed functioncalculateRisk()
Relevant existing tests4 found
Missing coverage1 test created
Call paths checked7
Result5 tests passed
Let every Claude change arrive with evidence.
Install CodeMD for VS Code and try focused, call-graph-aware testing for free.