Add koog module: a tool-calling agent, a strategy graph with a Java node and the Spring Boot starter on Koog 1.3.0, tested against a scripted OpenAI-compatible endpoint

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b6FHj1ptP5Fej2eFDo

koog/scripts/kotlin-bom-trap.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# Reproduces the failure you get when Spring Boot's BOM wins and Kotlin stays on 1.9.25.
+# Run from the repository root after `mvn test -pl koog` (needs koog/target/test-classes).
+set -eu
+cd "$(dirname "$0")/.."
+OUT=output/07-kotlin-bom-trap.txt
+mvn -B -q dependency:build-classpath -Dmdep.outputFile=target/cp.txt >/dev/null 2>&1
+mvn -B -q dependency:get -Dartifact=org.jetbrains.kotlin:kotlin-stdlib:1.9.25 >/dev/null 2>&1
+OLD="$HOME/.m2/repository/org/jetbrains/kotlin/kotlin-stdlib/1.9.25/kotlin-stdlib-1.9.25.jar"
+
+good="$(cat target/cp.txt)"
+bad="$(echo "$good" | tr ':' '\n' | sed "s#.*/kotlin-stdlib-2\.3\.10\.jar#$OLD#" | tr '\n' ':')"
+
+{
+  echo "kotlin-stdlib on the classpath (correct, Kotlin BOM imported first):"
+  echo "$good" | tr ':' '\n' | grep -o 'kotlin-stdlib-[0-9.]*\.jar' | sed 's/^/  /'
+  echo
+  echo "Same classpath with kotlin-stdlib 1.9.25, which is what the Spring Boot 3.5.16 BOM picks when it comes first:"
+  echo "$bad" | tr ':' '\n' | grep -o 'kotlin-stdlib-[0-9.]*\.jar' | sed 's/^/  /'
+  echo
+  echo '$ java -cp <that classpath> com.ankurm.koog.TrapMain'
+  java -cp "target/test-classes:target/classes:$bad" com.ankurm.koog.TrapMain 2>&1 \
+    | grep -vE 'SLF4J|Picked up|kotlin-logging' | head -4 | sed 's/^/  /'
+} > "$OUT"
+cat "$OUT"

koog/scripts/run-all.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+# Regenerates every file in output/. Needs JDK 25 on JAVA_HOME and a network for the first Maven run.
+set -eu
+cd "$(dirname "$0")/.."
+mvn -B -q test
+scripts/kotlin-bom-trap.sh