Add configuration source reporting

docs/troubleshooting.md

@@ -71,6 +71,32 @@ Safe fix:
 
 Relevant reference: [Configuration](./config.md).
 
+## Unexpected imported or profile value
+
+Symptom:
+
+- an effective configuration value differs from the root file, or a duplicate
+  ownership/configuration error is hard to locate.
+
+Diagnostics:
+
+```bash
+narratio config sources --config /path/pipeline.yml --profile testing
+```
+
+Add `--campaign` or `--campaign-file` when the pipeline has party-driven
+artifact families. The output identifies each effective logical field's root,
+import, profile, default, campaign, party, or family source without printing
+the field value or credential contents.
+
+Safe fix:
+
+- move a duplicated base field so it has one owner;
+- correct the selected profile or its overlay; or
+- correct the campaign party/family declaration that owns generated values.
+
+Relevant reference: [Configuration inspection](./config.md#read-only-effective-pipeline-inspection).
+
 ## Audio mode conflict
 
 Symptom: