Extract core modules for improved architecture

  Extract functionality from spring-ai-core into dedicated modules:
  - spring-ai-commons: Common utilities and document handling
  - spring-ai-model: Core model interfaces and implementations
  - spring-ai-vector-store: Vector store abstraction and implementation

  This modularization creates clearer responsibility boundaries and allows
  consumers to include only what they need. The restructuring will make the
  codebase easier to maintain and extend as the project grows.

Author: markpollack

pom.xml

@@ -32,8 +32,11 @@
 	<modules>
 		<module>spring-ai-docs</module>
 		<module>spring-ai-bom</module>
+		<module>spring-ai-commons</module>
 		<module>spring-ai-core</module>
+		<module>spring-ai-model</module>
 		<module>spring-ai-test</module>
+		<module>spring-ai-vector-store</module>
 
 		<module>auto-configurations/common/spring-ai-autoconfigure-retry</module>
 

spring-ai-commons/pom.xml

@@ -0,0 +1,108 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright 2023-2024 the original author or authors.
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      https://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xmlns="http://maven.apache.org/POM/4.0.0"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.ai</groupId>
+		<artifactId>spring-ai</artifactId>
+		<version>1.0.0-SNAPSHOT</version>
+	</parent>
+	<artifactId>spring-ai-commons</artifactId>
+	<packaging>jar</packaging>
+	<name>Spring AI Commons</name>
+	<description>Common classes used across Spring AI</description>
+	<url>https://github.com/spring-projects/spring-ai</url>
+
+	<scm>
+		<url>https://github.com/spring-projects/spring-ai</url>
+		<connection>git://github.com/spring-projects/spring-ai.git</connection>
+		<developerConnection>git@github.com:spring-projects/spring-ai.git</developerConnection>
+	</scm>
+
+	<dependencies>
+		<!-- Spring Framework -->
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-context</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>io.micrometer</groupId>
+			<artifactId>micrometer-core</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>io.micrometer</groupId>
+			<artifactId>context-propagation</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>io.micrometer</groupId>
+			<artifactId>micrometer-tracing-bridge-otel</artifactId>
+			<optional>true</optional>
+		</dependency>
+
+
+		<dependency>
+			<groupId>com.fasterxml.jackson.module</groupId>
+			<artifactId>jackson-module-jsonSchema</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.fasterxml.jackson.core</groupId>
+			<artifactId>jackson-databind</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.jetbrains.kotlin</groupId>
+			<artifactId>kotlin-stdlib</artifactId>
+			<optional>true</optional>
+		</dependency>
+
+		<dependency>
+			<groupId>org.jetbrains.kotlin</groupId>
+			<artifactId>kotlin-reflect</artifactId>
+			<optional>true</optional>
+		</dependency>
+
+		<!-- JTokkit for tokenization -->
+		<dependency>
+			<groupId>com.knuddels</groupId>
+			<artifactId>jtokkit</artifactId>
+			<version>${jtokkit.version}</version>
+		</dependency>
+
+		<!-- test dependencies -->
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>com.fasterxml.jackson.module</groupId>
+			<artifactId>jackson-module-kotlin</artifactId>
+			<scope>test</scope>
+		</dependency>
+
+	</dependencies>
+
+
+</project>

spring-ai-core/src/main/java/org/springframework/ai/document/ContentFormatter.java renamed to spring-ai-commons/src/main/java/org/springframework/ai/document/ContentFormatter.java

@@ -16,11 +16,9 @@
 
 package org.springframework.ai.document;
 
-import org.springframework.ai.vectorstore.VectorStore;
-
 /**
  * Common set of metadata keys used in {@link Document}s by {@link DocumentReader}s and
- * {@link VectorStore}s.
+ * VectorStores.
  *
  * @author Thomas Vitale
  * @since 1.0.0