diff --git a/bridged/pom.xml b/bridged/pom.xml
index d7923ee..6c931e9 100644
--- a/bridged/pom.xml
+++ b/bridged/pom.xml
@@ -169,6 +169,30 @@
                 <version>3.14.0</version>
             </plugin>
 
+            <!--
+              Coverage (CB-509). Build-time tooling only — never a compile/runtime dependency, so
+              it adds nothing to the shipped jar. Report lands at target/site/jacoco/index.html and
+              target/site/jacoco/jacoco.csv. No `check` rule / threshold is wired: a coverage gate
+              rewards writing tests that execute lines, which is the failure mode this project is
+              trying to avoid, not encourage.
+            -->
+            <plugin>
+                <groupId>org.jacoco</groupId>
+                <artifactId>jacoco-maven-plugin</artifactId>
+                <version>0.8.13</version>
+                <executions>
+                    <execution>
+                        <id>prepare-agent</id>
+                        <goals><goal>prepare-agent</goal></goals>
+                    </execution>
+                    <execution>
+                        <id>report</id>
+                        <phase>test</phase>
+                        <goals><goal>report</goal></goals>
+                    </execution>
+                </executions>
+            </plugin>
+
             <!-- Unit tests run by default; contract tests (live herdr) are tag-excluded. -->
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>