diff --git a/.idea/libraries/io_ktor_utils.xml b/.idea/libraries/io_ktor_utils.xml
index 3cb1a9d0dbf0..2b320d7b821e 100644
--- a/.idea/libraries/io_ktor_utils.xml
+++ b/.idea/libraries/io_ktor_utils.xml
@@ -10,9 +10,7 @@
     <CLASSES>
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-utils-jvm/3.0.3/ktor-utils-jvm-3.0.3.jar!/" />
     </CLASSES>
-    <JAVADOC>
-      <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-utils-jvm/3.0.3/ktor-utils-jvm-3.0.3-javadoc.jar!/" />
-    </JAVADOC>
+    <JAVADOC />
     <SOURCES>
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-utils-jvm/3.0.3/ktor-utils-jvm-3.0.3-sources.jar!/" />
     </SOURCES>
diff --git a/.idea/libraries/kotlinx_io_core.xml b/.idea/libraries/kotlinx_io_core.xml
new file mode 100644
index 000000000000..48372430f2a4
--- /dev/null
+++ b/.idea/libraries/kotlinx_io_core.xml
@@ -0,0 +1,26 @@
+<component name="libraryTable">
+  <library name="kotlinx-io-core" type="repository">
+    <properties maven-id="org.jetbrains.kotlinx:kotlinx-io-core-jvm:0.6.0">
+      <verification>
+        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.6.0/kotlinx-io-core-jvm-0.6.0.jar">
+          <sha256sum>42523c80823d31ef59fae42c9252ef1d3b1189ca9d3cc3adfd402a29d063e6ff</sha256sum>
+        </artifact>
+        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.6.0/kotlinx-io-bytestring-jvm-0.6.0.jar">
+          <sha256sum>baa77a783d70a66af88d6898a1d4971e4aa84e62b26418057379bdf09fb5bada</sha256sum>
+        </artifact>
+      </verification>
+      <exclude>
+        <dependency maven-id="org.jetbrains.kotlin:kotlin-stdlib" />
+      </exclude>
+    </properties>
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.6.0/kotlinx-io-core-jvm-0.6.0.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.6.0/kotlinx-io-bytestring-jvm-0.6.0.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.6.0/kotlinx-io-core-jvm-0.6.0-sources.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.6.0/kotlinx-io-bytestring-jvm-0.6.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/libraries/ktor_client.xml b/.idea/libraries/ktor_client.xml
index 866aa0c07fc7..a2a3a80515e2 100644
--- a/.idea/libraries/ktor_client.xml
+++ b/.idea/libraries/ktor_client.xml
@@ -14,12 +14,6 @@
         <artifact url="file://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3.jar">
           <sha256sum>587f6aa4a22daf484ebb84ee5513f1b898e0feeeac714bd2fe0dd2232f57ade5</sha256sum>
         </artifact>
-        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4.jar">
-          <sha256sum>dc3587c12795af01231591c0ef09a4139dfca8113c2989273b96b958006853c3</sha256sum>
-        </artifact>
-        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4.jar">
-          <sha256sum>1fc96e19b445387dbc49183d0cc623c5a61bfa47c86cf81aaf5aff4845154fab</sha256sum>
-        </artifact>
         <artifact url="file://$MAVEN_REPOSITORY$/io/ktor/ktor-events-jvm/3.0.3/ktor-events-jvm-3.0.3.jar">
           <sha256sum>317ee7adeb43e197717a5ab61fa3d8761514805ca0bcff49de029c4d6f2b3df2</sha256sum>
         </artifact>
@@ -39,6 +33,7 @@
       <exclude>
         <dependency maven-id="org.slf4j:slf4j-api" />
         <dependency maven-id="org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm" />
+        <dependency maven-id="org.jetbrains.kotlinx:kotlinx-io-core-jvm" />
         <dependency maven-id="org.jetbrains.kotlin:kotlin-stdlib" />
         <dependency maven-id="org.jetbrains.kotlinx:kotlinx-serialization-core-jvm" />
         <dependency maven-id="org.jetbrains.kotlinx:kotlinx-coroutines-slf4j" />
@@ -49,8 +44,6 @@
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-http-jvm/3.0.3/ktor-http-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-utils-jvm/3.0.3/ktor-utils-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-events-jvm/3.0.3/ktor-events-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-websocket-serialization-jvm/3.0.3/ktor-websocket-serialization-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-serialization-jvm/3.0.3/ktor-serialization-jvm-3.0.3.jar!/" />
@@ -63,8 +56,6 @@
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-http-jvm/3.0.3/ktor-http-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-utils-jvm/3.0.3/ktor-utils-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3-sources.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4-sources.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-events-jvm/3.0.3/ktor-events-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-websocket-serialization-jvm/3.0.3/ktor-websocket-serialization-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-serialization-jvm/3.0.3/ktor-serialization-jvm-3.0.3-sources.jar!/" />
diff --git a/.idea/libraries/ktor_client_cio.xml b/.idea/libraries/ktor_client_cio.xml
index b66e0ae91b28..958b472f8745 100644
--- a/.idea/libraries/ktor_client_cio.xml
+++ b/.idea/libraries/ktor_client_cio.xml
@@ -32,12 +32,6 @@
         <artifact url="file://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3.jar">
           <sha256sum>587f6aa4a22daf484ebb84ee5513f1b898e0feeeac714bd2fe0dd2232f57ade5</sha256sum>
         </artifact>
-        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4.jar">
-          <sha256sum>dc3587c12795af01231591c0ef09a4139dfca8113c2989273b96b958006853c3</sha256sum>
-        </artifact>
-        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4.jar">
-          <sha256sum>1fc96e19b445387dbc49183d0cc623c5a61bfa47c86cf81aaf5aff4845154fab</sha256sum>
-        </artifact>
         <artifact url="file://$MAVEN_REPOSITORY$/io/ktor/ktor-websockets-jvm/3.0.3/ktor-websockets-jvm-3.0.3.jar">
           <sha256sum>4ecb08d33dc0d7c9d6b943b2b3e706f3d55fabef584b0c72fb2f0c5ba8a0eb7a</sha256sum>
         </artifact>
@@ -54,6 +48,7 @@
         <dependency maven-id="org.jetbrains.kotlinx:kotlinx-serialization-core-jvm" />
         <dependency maven-id="org.jetbrains.kotlin:kotlin-stdlib" />
         <dependency maven-id="org.jetbrains.kotlinx:kotlinx-coroutines-slf4j" />
+        <dependency maven-id="org.jetbrains.kotlinx:kotlinx-io-core-jvm" />
       </exclude>
     </properties>
     <CLASSES>
@@ -67,8 +62,6 @@
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-http-cio-jvm/3.0.3/ktor-http-cio-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-network-jvm/3.0.3/ktor-network-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-websockets-jvm/3.0.3/ktor-websockets-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-network-tls-jvm/3.0.3/ktor-network-tls-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-utils-jvm/3.0.3/ktor-utils-jvm-3.0.3.jar!/" />
@@ -85,8 +78,6 @@
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-http-cio-jvm/3.0.3/ktor-http-cio-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-network-jvm/3.0.3/ktor-network-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3-sources.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4-sources.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-websockets-jvm/3.0.3/ktor-websockets-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-network-tls-jvm/3.0.3/ktor-network-tls-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-utils-jvm/3.0.3/ktor-utils-jvm-3.0.3-sources.jar!/" />
diff --git a/.idea/libraries/ktor_client_core.xml b/.idea/libraries/ktor_client_core.xml
index a5367d824327..55c12f20dbca 100644
--- a/.idea/libraries/ktor_client_core.xml
+++ b/.idea/libraries/ktor_client_core.xml
@@ -14,12 +14,6 @@
         <artifact url="file://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3.jar">
           <sha256sum>587f6aa4a22daf484ebb84ee5513f1b898e0feeeac714bd2fe0dd2232f57ade5</sha256sum>
         </artifact>
-        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4.jar">
-          <sha256sum>dc3587c12795af01231591c0ef09a4139dfca8113c2989273b96b958006853c3</sha256sum>
-        </artifact>
-        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4.jar">
-          <sha256sum>1fc96e19b445387dbc49183d0cc623c5a61bfa47c86cf81aaf5aff4845154fab</sha256sum>
-        </artifact>
         <artifact url="file://$MAVEN_REPOSITORY$/io/ktor/ktor-events-jvm/3.0.3/ktor-events-jvm-3.0.3.jar">
           <sha256sum>317ee7adeb43e197717a5ab61fa3d8761514805ca0bcff49de029c4d6f2b3df2</sha256sum>
         </artifact>
@@ -39,6 +33,7 @@
       <exclude>
         <dependency maven-id="org.slf4j:slf4j-api" />
         <dependency maven-id="org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm" />
+        <dependency maven-id="org.jetbrains.kotlinx:kotlinx-io-core-jvm" />
         <dependency maven-id="org.jetbrains.kotlin:kotlin-stdlib" />
         <dependency maven-id="org.jetbrains.kotlinx:kotlinx-serialization-core-jvm" />
         <dependency maven-id="org.jetbrains.kotlinx:kotlinx-coroutines-slf4j" />
@@ -49,8 +44,6 @@
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-http-jvm/3.0.3/ktor-http-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-utils-jvm/3.0.3/ktor-utils-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-events-jvm/3.0.3/ktor-events-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-websocket-serialization-jvm/3.0.3/ktor-websocket-serialization-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-serialization-jvm/3.0.3/ktor-serialization-jvm-3.0.3.jar!/" />
@@ -63,8 +56,6 @@
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-http-jvm/3.0.3/ktor-http-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-utils-jvm/3.0.3/ktor-utils-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3-sources.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4-sources.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-events-jvm/3.0.3/ktor-events-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-websocket-serialization-jvm/3.0.3/ktor-websocket-serialization-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-serialization-jvm/3.0.3/ktor-serialization-jvm-3.0.3-sources.jar!/" />
diff --git a/.idea/libraries/ktor_client_mock.xml b/.idea/libraries/ktor_client_mock.xml
index fde0b43617da..a3d6aa3143ba 100644
--- a/.idea/libraries/ktor_client_mock.xml
+++ b/.idea/libraries/ktor_client_mock.xml
@@ -14,12 +14,6 @@
         <artifact url="file://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3.jar">
           <sha256sum>587f6aa4a22daf484ebb84ee5513f1b898e0feeeac714bd2fe0dd2232f57ade5</sha256sum>
         </artifact>
-        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4.jar">
-          <sha256sum>dc3587c12795af01231591c0ef09a4139dfca8113c2989273b96b958006853c3</sha256sum>
-        </artifact>
-        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4.jar">
-          <sha256sum>1fc96e19b445387dbc49183d0cc623c5a61bfa47c86cf81aaf5aff4845154fab</sha256sum>
-        </artifact>
         <artifact url="file://$MAVEN_REPOSITORY$/io/ktor/ktor-client-core-jvm/3.0.3/ktor-client-core-jvm-3.0.3.jar">
           <sha256sum>e3d174d16548023805041b29a42fb135bfe3182534d3bf9f839d5821337f8d69</sha256sum>
         </artifact>
@@ -42,6 +36,7 @@
       <exclude>
         <dependency maven-id="org.slf4j:slf4j-api" />
         <dependency maven-id="org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm" />
+        <dependency maven-id="org.jetbrains.kotlinx:kotlinx-io-core-jvm" />
         <dependency maven-id="org.jetbrains.kotlin:kotlin-stdlib" />
         <dependency maven-id="org.jetbrains.kotlinx:kotlinx-serialization-core-jvm" />
         <dependency maven-id="org.jetbrains.kotlinx:kotlinx-coroutines-slf4j" />
@@ -52,8 +47,6 @@
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-http-jvm/3.0.3/ktor-http-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-utils-jvm/3.0.3/ktor-utils-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-client-core-jvm/3.0.3/ktor-client-core-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-events-jvm/3.0.3/ktor-events-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-websocket-serialization-jvm/3.0.3/ktor-websocket-serialization-jvm-3.0.3.jar!/" />
@@ -67,8 +60,6 @@
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-http-jvm/3.0.3/ktor-http-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-utils-jvm/3.0.3/ktor-utils-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3-sources.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4-sources.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-client-core-jvm/3.0.3/ktor-client-core-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-events-jvm/3.0.3/ktor-events-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-websocket-serialization-jvm/3.0.3/ktor-websocket-serialization-jvm-3.0.3-sources.jar!/" />
diff --git a/.idea/libraries/ktor_network_tls.xml b/.idea/libraries/ktor_network_tls.xml
index efcde1982214..0b7ecdf093e1 100644
--- a/.idea/libraries/ktor_network_tls.xml
+++ b/.idea/libraries/ktor_network_tls.xml
@@ -17,18 +17,13 @@
         <artifact url="file://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3.jar">
           <sha256sum>587f6aa4a22daf484ebb84ee5513f1b898e0feeeac714bd2fe0dd2232f57ade5</sha256sum>
         </artifact>
-        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4.jar">
-          <sha256sum>dc3587c12795af01231591c0ef09a4139dfca8113c2989273b96b958006853c3</sha256sum>
-        </artifact>
-        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4.jar">
-          <sha256sum>1fc96e19b445387dbc49183d0cc623c5a61bfa47c86cf81aaf5aff4845154fab</sha256sum>
-        </artifact>
       </verification>
       <exclude>
         <dependency maven-id="org.slf4j:slf4j-api" />
         <dependency maven-id="org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm" />
         <dependency maven-id="org.jetbrains.kotlinx:kotlinx-serialization-core-jvm" />
         <dependency maven-id="org.jetbrains.kotlin:kotlin-stdlib" />
+        <dependency maven-id="org.jetbrains.kotlinx:kotlinx-io-core-jvm" />
       </exclude>
     </properties>
     <CLASSES>
@@ -37,8 +32,6 @@
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-network-jvm/3.0.3/ktor-network-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-utils-jvm/3.0.3/ktor-utils-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4.jar!/" />
     </CLASSES>
     <JAVADOC />
     <SOURCES>
@@ -47,8 +40,6 @@
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-network-jvm/3.0.3/ktor-network-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-utils-jvm/3.0.3/ktor-utils-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3-sources.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4-sources.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4-sources.jar!/" />
     </SOURCES>
   </library>
 </component>
\ No newline at end of file
diff --git a/.idea/libraries/ktor_server_cio.xml b/.idea/libraries/ktor_server_cio.xml
index 84b6787b653f..fe02d8af71bb 100644
--- a/.idea/libraries/ktor_server_cio.xml
+++ b/.idea/libraries/ktor_server_cio.xml
@@ -29,12 +29,6 @@
         <artifact url="file://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3.jar">
           <sha256sum>587f6aa4a22daf484ebb84ee5513f1b898e0feeeac714bd2fe0dd2232f57ade5</sha256sum>
         </artifact>
-        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4.jar">
-          <sha256sum>dc3587c12795af01231591c0ef09a4139dfca8113c2989273b96b958006853c3</sha256sum>
-        </artifact>
-        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4.jar">
-          <sha256sum>1fc96e19b445387dbc49183d0cc623c5a61bfa47c86cf81aaf5aff4845154fab</sha256sum>
-        </artifact>
         <artifact url="file://$MAVEN_REPOSITORY$/io/ktor/ktor-websockets-jvm/3.0.3/ktor-websockets-jvm-3.0.3.jar">
           <sha256sum>4ecb08d33dc0d7c9d6b943b2b3e706f3d55fabef584b0c72fb2f0c5ba8a0eb7a</sha256sum>
         </artifact>
@@ -49,6 +43,7 @@
         <dependency maven-id="org.jetbrains.kotlin:kotlin-stdlib" />
         <dependency maven-id="org.jetbrains.kotlin:kotlin-reflect" />
         <dependency maven-id="org.fusesource.jansi:jansi" />
+        <dependency maven-id="org.jetbrains.kotlinx:kotlinx-io-core-jvm" />
       </exclude>
     </properties>
     <CLASSES>
@@ -61,8 +56,6 @@
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-events-jvm/3.0.3/ktor-events-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-http-cio-jvm/3.0.3/ktor-http-cio-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-websockets-jvm/3.0.3/ktor-websockets-jvm-3.0.3.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-network-jvm/3.0.3/ktor-network-jvm-3.0.3.jar!/" />
     </CLASSES>
@@ -77,8 +70,6 @@
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-events-jvm/3.0.3/ktor-events-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-http-cio-jvm/3.0.3/ktor-http-cio-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-io-jvm/3.0.3/ktor-io-jvm-3.0.3-sources.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-core-jvm/0.5.4/kotlinx-io-core-jvm-0.5.4-sources.jar!/" />
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/kotlinx/kotlinx-io-bytestring-jvm/0.5.4/kotlinx-io-bytestring-jvm-0.5.4-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-websockets-jvm/3.0.3/ktor-websockets-jvm-3.0.3-sources.jar!/" />
       <root url="jar://$MAVEN_REPOSITORY$/io/ktor/ktor-network-jvm/3.0.3/ktor-network-jvm-3.0.3-sources.jar!/" />
     </SOURCES>
diff --git a/.idea/modules.xml b/.idea/modules.xml
index 934d2dd2bb52..b07f53f72271 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -614,6 +614,7 @@
       <module fileurl="file://$PROJECT_DIR$/libraries/junit5-params/intellij.libraries.junit5.params.iml" filepath="$PROJECT_DIR$/libraries/junit5-params/intellij.libraries.junit5.params.iml" />
       <module fileurl="file://$PROJECT_DIR$/libraries/junit5-pioneer/intellij.libraries.junit5.pioneer.iml" filepath="$PROJECT_DIR$/libraries/junit5-pioneer/intellij.libraries.junit5.pioneer.iml" />
       <module fileurl="file://$PROJECT_DIR$/libraries/kotlin-test/intellij.libraries.kotlinTest.iml" filepath="$PROJECT_DIR$/libraries/kotlin-test/intellij.libraries.kotlinTest.iml" />
+      <module fileurl="file://$PROJECT_DIR$/libraries/io/intellij.libraries.kotlinx.io.iml" filepath="$PROJECT_DIR$/libraries/io/intellij.libraries.kotlinx.io.iml" />
       <module fileurl="file://$PROJECT_DIR$/libraries/ktor-client/intellij.libraries.ktor.client.iml" filepath="$PROJECT_DIR$/libraries/ktor-client/intellij.libraries.ktor.client.iml" />
       <module fileurl="file://$PROJECT_DIR$/libraries/ktor-client-cio/intellij.libraries.ktor.client.cio.iml" filepath="$PROJECT_DIR$/libraries/ktor-client-cio/intellij.libraries.ktor.client.cio.iml" />
       <module fileurl="file://$PROJECT_DIR$/libraries/microba/intellij.libraries.microba.iml" filepath="$PROJECT_DIR$/libraries/microba/intellij.libraries.microba.iml" />
diff --git a/java/idea-ui/intellij.java.ui.tests.iml b/java/idea-ui/intellij.java.ui.tests.iml
index b17ea2e8bcd8..80e20d94286f 100644
--- a/java/idea-ui/intellij.java.ui.tests.iml
+++ b/java/idea-ui/intellij.java.ui.tests.iml
@@ -29,5 +29,6 @@
     <orderEntry type="library" scope="TEST" name="ktor-server-cio" level="project" />
     <orderEntry type="module" module-name="intellij.platform.testFramework.junit5.eel" scope="TEST" />
     <orderEntry type="module" module-name="intellij.platform.eel.provider" scope="TEST" />
+    <orderEntry type="module" module-name="intellij.libraries.kotlinx.io" scope="TEST" />
   </component>
 </module>
\ No newline at end of file
diff --git a/libraries/io/intellij.libraries.kotlinx.io.iml b/libraries/io/intellij.libraries.kotlinx.io.iml
new file mode 100644
index 000000000000..efb085ec7aa9
--- /dev/null
+++ b/libraries/io/intellij.libraries.kotlinx.io.iml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_11" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/resources" type="java-resource" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" exported="" name="kotlinx-io-core" level="project" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/libraries/io/resources/intellij.libraries.kotlinx.io.xml b/libraries/io/resources/intellij.libraries.kotlinx.io.xml
new file mode 100644
index 000000000000..6fb76a66265d
--- /dev/null
+++ b/libraries/io/resources/intellij.libraries.kotlinx.io.xml
@@ -0,0 +1,2 @@
+<idea-plugin>
+</idea-plugin>
\ No newline at end of file
diff --git a/libraries/ktor-client/intellij.libraries.ktor.client.iml b/libraries/ktor-client/intellij.libraries.ktor.client.iml
index 4e8bf1debe8a..979d607361bf 100644
--- a/libraries/ktor-client/intellij.libraries.ktor.client.iml
+++ b/libraries/ktor-client/intellij.libraries.ktor.client.iml
@@ -12,6 +12,8 @@
     <orderEntry type="library" exported="" name="ktor-client-encoding" level="project" />
     <orderEntry type="library" exported="" name="ktor-client-content-negotiation" level="project" />
     <orderEntry type="library" exported="" name="ktor-serialization-kotlinx-json" level="project" />
+    <orderEntry type="library" exported="" name="kotlinx-serialization-json-io" level="project" />
     <orderEntry type="library" exported="" name="ktor-client-auth" level="project" />
+    <orderEntry type="module" module-name="intellij.libraries.kotlinx.io" />
   </component>
 </module>
\ No newline at end of file
diff --git a/libraries/ktor-client/resources/intellij.libraries.ktor.client.xml b/libraries/ktor-client/resources/intellij.libraries.ktor.client.xml
index 2748ba9ef8ca..972965f412a3 100644
--- a/libraries/ktor-client/resources/intellij.libraries.ktor.client.xml
+++ b/libraries/ktor-client/resources/intellij.libraries.ktor.client.xml
@@ -1,3 +1,6 @@
 <!-- cannot use dependent-on-core="false" - kotlin stdlib is required -->
 <idea-plugin>
+  <dependencies>
+    <module name="intellij.libraries.kotlinx.io" />
+  </dependencies>
 </idea-plugin>
\ No newline at end of file
diff --git a/platform/build-scripts/downloader/intellij.platform.buildScripts.downloader.iml b/platform/build-scripts/downloader/intellij.platform.buildScripts.downloader.iml
index 6f356a33960c..344c659fca58 100644
--- a/platform/build-scripts/downloader/intellij.platform.buildScripts.downloader.iml
+++ b/platform/build-scripts/downloader/intellij.platform.buildScripts.downloader.iml
@@ -23,5 +23,6 @@
     <orderEntry type="library" name="okhttp" level="project" />
     <orderEntry type="library" name="ktor-client-core" level="project" />
     <orderEntry type="library" name="hash4j" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="kotlinx-io-core" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/platform/build-scripts/intellij.platform.buildScripts.iml b/platform/build-scripts/intellij.platform.buildScripts.iml
index 2ba3adccb7fc..0487a55dc237 100644
--- a/platform/build-scripts/intellij.platform.buildScripts.iml
+++ b/platform/build-scripts/intellij.platform.buildScripts.iml
@@ -241,6 +241,7 @@
     <orderEntry type="module" module-name="intellij.platform.boot" />
     <orderEntry type="module" module-name="intellij.platform.ijent.community.buildConstants" />
     <orderEntry type="library" name="ktor-client-core" level="project" />
+    <orderEntry type="module" module-name="intellij.libraries.kotlinx.io" />
     <orderEntry type="library" scope="RUNTIME" name="snakeyaml" level="project" />
     <orderEntry type="library" name="netty" level="project" />
     <orderEntry type="library" name="netty-tcnative-boringssl" level="project" />
diff --git a/platform/build-scripts/src/org/jetbrains/intellij/build/CommunityLibraryLicenses.kt b/platform/build-scripts/src/org/jetbrains/intellij/build/CommunityLibraryLicenses.kt
index 266c5cc1ae6b..4137e7092e27 100644
--- a/platform/build-scripts/src/org/jetbrains/intellij/build/CommunityLibraryLicenses.kt
+++ b/platform/build-scripts/src/org/jetbrains/intellij/build/CommunityLibraryLicenses.kt
@@ -787,6 +787,10 @@ object CommunityLibraryLicenses {
       .apache("https://github.com/Kotlin/kotlinx.coroutines/blob/master/LICENSE.txt")
       .suppliedByOrganizations(Suppliers.JETBRAINS),
 
+    LibraryLicense("Kotlin library providing basic IO primitives", libraryName = "kotlinx-io-core", url = "https://github.com/Kotlin/kotlinx-io")
+      .apache("https://github.com/Kotlin/kotlinx-io/blob/master/LICENSE")
+      .suppliedByOrganizations(Suppliers.JETBRAINS),
+
     LibraryLicense("Kotlin multiplatform / multi-format serialization", libraryName = "kotlinx-serialization-core", url = "https://github.com/Kotlin/kotlinx.serialization")
       .apache("https://github.com/Kotlin/kotlinx.serialization/blob/master/LICENSE.txt")
       .suppliedByOrganizations(Suppliers.JETBRAINS),
diff --git a/platform/platform-resources/src/META-INF/essential-modules.xml b/platform/platform-resources/src/META-INF/essential-modules.xml
index fd267fb5918d..8c7f7caf3357 100644
--- a/platform/platform-resources/src/META-INF/essential-modules.xml
+++ b/platform/platform-resources/src/META-INF/essential-modules.xml
@@ -4,6 +4,8 @@
     <module name="intellij.libraries.ktor.client"/>
     <module name="intellij.libraries.ktor.client.cio"/>
 
+    <module name="intellij.libraries.kotlinx.io"/>
+
     <module name="intellij.platform.backend"/>
     <module name="intellij.platform.rpc.backend"/>
     <module name="intellij.platform.kernel.impl"/>
diff --git a/platform/platform-tests/durability/intellij.platform.durability.iml b/platform/platform-tests/durability/intellij.platform.durability.iml
index 823258d74623..568c580cc1ed 100644
--- a/platform/platform-tests/durability/intellij.platform.durability.iml
+++ b/platform/platform-tests/durability/intellij.platform.durability.iml
@@ -31,6 +31,7 @@
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="module" module-name="intellij.platform.util.ex" />
     <orderEntry type="library" scope="TEST" name="ktor-network-tls" level="project" />
+    <orderEntry type="module" module-name="intellij.libraries.kotlinx.io" scope="TEST" />
     <orderEntry type="module" module-name="intellij.platform.ide.impl" />
     <orderEntry type="library" scope="TEST" name="kotlinx-serialization-core" level="project" />
     <orderEntry type="library" scope="TEST" name="kotlinx-serialization-json" level="project" />
diff --git a/platform/platform-tests/intellij.platform.tests.iml b/platform/platform-tests/intellij.platform.tests.iml
index 45de9072ce70..1f1d0bbe2a61 100644
--- a/platform/platform-tests/intellij.platform.tests.iml
+++ b/platform/platform-tests/intellij.platform.tests.iml
@@ -113,6 +113,7 @@
     <orderEntry type="library" name="kotlinx-collections-immutable" level="project" />
     <orderEntry type="module" module-name="intellij.platform.buildData" scope="TEST" />
     <orderEntry type="library" scope="TEST" name="ktor-server-cio" level="project" />
+    <orderEntry type="module" module-name="intellij.libraries.kotlinx.io" scope="TEST" />
     <orderEntry type="module" module-name="intellij.platform.ui.jcef" scope="TEST" />
     <orderEntry type="library" scope="TEST" name="rhino" level="project" />
     <orderEntry type="module" module-name="intellij.platform.eel.impl" />
diff --git a/platform/util/http/intellij.platform.util.http.iml b/platform/util/http/intellij.platform.util.http.iml
index 00c026ceba40..44b8ed89e58b 100644
--- a/platform/util/http/intellij.platform.util.http.iml
+++ b/platform/util/http/intellij.platform.util.http.iml
@@ -27,6 +27,7 @@
     <orderEntry type="library" name="kotlinx-coroutines-core" level="project" />
     <orderEntry type="library" name="jetbrains-annotations" level="project" />
     <orderEntry type="library" name="ktor-client-core" level="project" />
+    <orderEntry type="module" module-name="intellij.libraries.kotlinx.io" />
     <orderEntry type="library" name="ktor-client-java" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/platform/wsl-impl/intellij.platform.wsl.impl.iml b/platform/wsl-impl/intellij.platform.wsl.impl.iml
index e105030a6682..7418c0a1708c 100644
--- a/platform/wsl-impl/intellij.platform.wsl.impl.iml
+++ b/platform/wsl-impl/intellij.platform.wsl.impl.iml
@@ -16,5 +16,6 @@
     <orderEntry type="library" name="lz4-java" level="project" />
     <orderEntry type="module" module-name="intellij.platform.util.ex" />
     <orderEntry type="library" name="ktor-network-tls" level="project" />
+    <orderEntry type="module" module-name="intellij.libraries.kotlinx.io" />
   </component>
 </module>
\ No newline at end of file
diff --git a/plugins/evaluation-plugin/intellij.evaluationPlugin.iml b/plugins/evaluation-plugin/intellij.evaluationPlugin.iml
index 358357416f35..9744847ee2ad 100644
--- a/plugins/evaluation-plugin/intellij.evaluationPlugin.iml
+++ b/plugins/evaluation-plugin/intellij.evaluationPlugin.iml
@@ -12,6 +12,7 @@
     <orderEntry type="module" module-name="intellij.evaluationPlugin.languages" />
     <orderEntry type="module" module-name="intellij.evaluationPlugin.core" />
     <orderEntry type="module" module-name="intellij.completionMlRanking" />
+    <orderEntry type="module" module-name="intellij.libraries.kotlinx.io" />
     <orderEntry type="module" module-name="intellij.libraries.ktor.client" />
     <orderEntry type="module" module-name="intellij.platform.editor.ui" />
     <orderEntry type="module" module-name="intellij.statsCollector" />
diff --git a/plugins/repository-search/intellij.repository.search.iml b/plugins/repository-search/intellij.repository.search.iml
index aac9b9663ad8..ca9e614d8260 100644
--- a/plugins/repository-search/intellij.repository.search.iml
+++ b/plugins/repository-search/intellij.repository.search.iml
@@ -51,6 +51,7 @@
     <orderEntry type="library" name="kotlinx-coroutines-slf4j" level="project" />
     <orderEntry type="library" scope="TEST" name="ktor-client-mock" level="project" />
     <orderEntry type="library" scope="TEST" name="kotlinx-coroutines-test" level="project" />
+    <orderEntry type="module" module-name="intellij.libraries.kotlinx.io" />
     <orderEntry type="module" module-name="intellij.libraries.ktor.client" />
     <orderEntry type="library" exported="" name="package-search-api-client" level="project" />
     <orderEntry type="library" name="kotlinx-document-store-mvstore" level="project" />
diff --git a/python/intellij.python.community.impl.iml b/python/intellij.python.community.impl.iml
index a7eb24f2f9b7..5ef1bed10043 100644
--- a/python/intellij.python.community.impl.iml
+++ b/python/intellij.python.community.impl.iml
@@ -130,6 +130,7 @@
     <orderEntry type="module" module-name="intellij.commandInterface" scope="RUNTIME" />
     <orderEntry type="module" module-name="intellij.python.syntax" />
     <orderEntry type="module" module-name="intellij.platform.ui.jcef" />
+    <orderEntry type="module" module-name="intellij.libraries.kotlinx.io" />
     <orderEntry type="module" module-name="intellij.libraries.ktor.client" />
     <orderEntry type="module" module-name="intellij.libraries.ktor.client.cio" />
     <orderEntry type="module" module-name="intellij.platform.util.progress" />