Three new article modules: configuration binding, profiles and config data, Spring AOP

configuration-properties/  @ConfigurationProperties vs @Value on Spring Boot 4.1.1.
  The relaxed-binding matrix is generated by binding each spelling rather than
  transcribed, and re-checked against real processes -- the in-process probe was
  wrong twice before it was right. Records the three findings that came out of it:
  @Value does get relaxed resolution inside Spring Boot (Boot attaches
  ConfigurationPropertySources), the configuration processor silently stops
  generating metadata on JDK 23+ when declared as a plain dependency, and @Valid is
  not what makes nested constraints run.

profiles-and-config/       Precedence, profiles, spring.config.import and config trees.
  /precedence reports every source holding a property in rank order with file and
  line, which turns "my profile file had no effect" into a two-line answer. Also
  pins the counterintuitive one: an imported file outranks the file that imported it.

spring-aop/                Designators, proxy types, and aspects that do not fire.
  One advice per supported designator so the reference table is generated from real
  matches; all fourteen unsupported designators fed to the parser. Two corrections to
  the reference documentation: unsupported designators throw
  UnsupportedPointcutPrimitiveException (extends RuntimeException, not
  IllegalArgumentException), and spring-boot-starter-aop was renamed to
  spring-boot-starter-aspectj in Boot 4.

19 contract tests across the three modules, 15 captured transcripts, all regenerated
by scripts/run-all.sh. Verified on Spring Boot 4.1.1, Spring Framework 7.0.9,
JDK 25.0.4.1.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Gip4srpzMwjgoba6uEfbr5

configuration-properties/docs/output/04-validation-failure.txt

@@ -0,0 +1,33 @@
+== startup with demo.validated.* deliberately out of range ==
+$ java -jar target/configuration-properties-1.0.0.jar --spring.profiles.active=badvalidation
+
+APPLICATION FAILED TO START
+***************************
+
+Description:
+
+Binding to target com.ankurm.configprops.props.ValidatedProperties failed:
+
+    Property: demo.validated.pool.size
+    Value: "4000"
+    Reason: must be less than or equal to 100
+
+    Property: demo.validated.endpoint
+    Value: "ftp://files.example.com"
+    Origin: class path resource [application-badvalidation.yaml] from configuration-properties-1.0.0.jar - 8:15
+    Reason: must match "https?://.*"
+
+    Property: demo.validated.port
+    Value: "99999"
+    Origin: class path resource [application-badvalidation.yaml] from configuration-properties-1.0.0.jar - 6:11
+    Reason: must be less than or equal to 65535
+
+    Property: demo.validated.name
+    Value: "  "
+    Origin: class path resource [application-badvalidation.yaml] from configuration-properties-1.0.0.jar - 4:11
+    Reason: must not be blank
+
+
+Action:
+
+Update your application's configuration