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

spring-aop/docs/output/03-broken-gallery.txt

@@ -0,0 +1,37 @@
+== aspects that do not fire ==
+
+{
+    "5-self-invocation": {
+        "beanIsProxied": true,
+        "result": "outer -> inner",
+        "innerAdvisedWhenCalledFromOuter": false,
+        "innerAdvisedWhenCalledDirectly": true
+    },
+    "6-created-with-new": {
+        "isProxy": false,
+        "adviceFired": false
+    },
+    "4-final-method": {
+        "beanIsProxied": true,
+        "proxyKind": "CGLIB subclass",
+        "adviceFired": false
+    },
+    "1-aspect-without-component-fired": false,
+    "2-pointcut-typo-fired": false,
+    "3-private-method-fired": false,
+    "note": "every value above should be false except the two that prove the method is advisable when reached through the proxy"
+}
+
+Reading it:
+
+  1 @Aspect without @Component  - the class is never instantiated, so the pointcut
+                                  is never registered. No warning is produced.
+  2 pointcut typo               - 'com.ankurm.aop.services' (plural) parses fine and
+                                  matches nothing. An empty match set is not an error.
+  3 private method              - cannot be overridden, so cannot be intercepted.
+  4 final method                - CGLIB subclasses; a final method is inherited, not
+                                  overridden. Note beanIsProxied is still true.
+  5 self-invocation             - innerAdvisedWhenCalledFromOuter is false and
+                                  innerAdvisedWhenCalledDirectly is true. Same method,
+                                  same advice: only the call path differs.
+  6 created with new            - no container, no proxy, no advice.