diff --git a/README.adoc b/README.adoc
index efd170d..6aeaf47 100644
--- a/README.adoc
+++ b/README.adoc
@@ -35,7 +35,7 @@ rule set configuration with an alternate name or at a non-default location.
 * Customizable JVM xref:#java-setup[vendor and version]. You can run _diKTat_
 using a default JVM, or you can set up your own one.
 
-* Customizable xref:#reporter[reporters] (_SARIF_, _JSON_, _Checkstyle_ XML).
+* Customizable xref:#reporter[reporter] (_SARIF_ or _Checkstyle_ XML).
 
 * Allows multiple xref:#input-paths[input paths]. If you have a multi-module
 project and only wish to check certain directories or modules, you can configure
@@ -61,7 +61,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: saveourtool/benedikt@v1
+      - uses: saveourtool/benedikt@v2
 ----
 
 == Configuration
@@ -77,15 +77,15 @@ You can override the name or the path of your YAML configuration file using the
 
 [source,yaml]
 ----
-      - uses: saveourtool/benedikt@v1
+      - uses: saveourtool/benedikt@v2
         with:
           config: path/to/diktat-analysis-custom.yml
 ----
 
 [#reporter]
-=== `reporter`: requesting a custom reporter
+=== `reporter`: requesting a type of reporter
 
-If you wish, you can report errors in a custom format.
+If you wish, you can report errors in a different format.
 
 * Default: `sarif`
 * Required: **no**
@@ -114,35 +114,6 @@ reporter:
 +
 image::checkstyle-xml-reporting.png[Checkstyle-XML reporting assisted by reviewdog]
 
-** `plain`: report errors in the plain-text format, e. g.:
-+
-[source]
-----
-C.kt:1:1: [MISSING_KDOC_TOP_LEVEL] all public and internal top-level classes and functions should have Kdoc: C (cannot be auto-corrected) (diktat-ruleset:kdoc-comments)
-C.kt:1:1: [FILE_NAME_INCORRECT] file name is incorrect - it should end with .kt extension and be in PascalCase: C.kt (diktat-ruleset:file-naming)
-C.kt:1:1: [PACKAGE_NAME_MISSING] no package name declared in a file: C.kt (diktat-ruleset:package-naming)
-C.kt:1:7: [CLASS_NAME_INCORRECT] class/enum/interface name should be in PascalCase and should contain only latin (ASCII) letters or numbers: C (diktat-ruleset:identifier-naming)
-C.kt:1:7: [IDENTIFIER_LENGTH] identifier's length is incorrect, it should be in range of [2, 64] symbols: C (cannot be auto-corrected) (diktat-ruleset:identifier-naming)
-----
-+
-The errors, if any, are printed on the standard output.
-
-** `plain?group_by_file`: same as above, but group errors by file, e. g.:
-+
-[source]
-----
-C.kt
-  1:1 [MISSING_KDOC_TOP_LEVEL] all public and internal top-level classes and functions should have Kdoc: C (cannot be auto-corrected)
-  1:1 [FILE_NAME_INCORRECT] file name is incorrect - it should end with .kt extension and be in PascalCase: C.kt
-  1:1 [PACKAGE_NAME_MISSING] no package name declared in a file: C.kt
-  1:7 [CLASS_NAME_INCORRECT] class/enum/interface name should be in PascalCase and should contain only latin (ASCII) letters or numbers: C
-  1:7 [IDENTIFIER_LENGTH] identifier's length is incorrect, it should be in range of [2, 64] symbols: C (cannot be auto-corrected)
-----
-
-** `json`: report errors in the JSON format to the file named `report.json`.
-
-** `html`: report errors in the HTML format to the file named `report.html`.
-
 [#input-paths]
 === `input-paths`: custom source sets
 
@@ -156,7 +127,7 @@ multiline string to specify multiple inputs.
 +
 [source,yaml]
 ----
-      - uses: saveourtool/benedikt@v1
+      - uses: saveourtool/benedikt@v2
         with:
           input-paths: |
             path/to/file.kt
@@ -167,7 +138,7 @@ and all `\*.kt` and `*.kts` files are passed to _diKTat_.
 +
 [source,yaml]
 ----
-      - uses: saveourtool/benedikt@v1
+      - uses: saveourtool/benedikt@v2
         with:
           input-paths: |
             src/main/kotlin
@@ -180,7 +151,7 @@ that match the path pattern. Path patterns may be negated, e. g.:
 +
 [source,yaml]
 ----
-      - uses: saveourtool/benedikt@v1
+      - uses: saveourtool/benedikt@v2
         with:
           input-paths: |
             **/*.kt
@@ -220,7 +191,7 @@ JDK is not sufficient: you'll need to set **both** `java-distribution` **and**
 
 [source,yaml]
 ----
-      - uses: saveourtool/benedikt@v1
+      - uses: saveourtool/benedikt@v2
         with:
           java-distribution: 'temurin'
           java-version: 17
@@ -237,7 +208,7 @@ fatal (i.e. the current step terminates with a failure):
 
 [source,yaml]
 ----
-      - uses: saveourtool/benedikt@v1
+      - uses: saveourtool/benedikt@v2
         with:
           fail-on-error: true
 ----
@@ -245,45 +216,9 @@ fatal (i.e. the current step terminates with a failure):
 [NOTE]
 
 This flag only affects the case when _diKTat_ exits with code **1**. Higher
-link:https://saveourtool.github.io/benedikt/docs/diktat-cli.html#exit-codes[exit
+link:https://diktat.saveourtool.com/diktat-cli/#exit-codes[exit
 codes] are _always_ fatal.
 
-=== `relative-paths`: relative or absolute paths
-
-* Default: `true`
-* Required: **no**
-
-If `true`, file paths get relativized with respect to the project directory.
-Otherwise, absolute file paths get reported. Example:
-
-[source,yaml]
-----
-      - uses: saveourtool/benedikt@v1
-        with:
-          relative-paths: true
-----
-
-[NOTE]
-
-When _SARIF_ xref:#reporter[reporter] is used, this flag has no effect: in
-_SARIF_ mode, paths reported are always absolute.
-
-=== `color`: colorizing the plain-text output
-
-* Default: `true`
-* Required: **no**
-
-Setting this flag enables the console output to be colorized. This is only
-useful if the xref:#reporter[reporter] is set to `plain` or `plain?group_by_file`:
-
-[source,yaml]
-----
-      - uses: saveourtool/benedikt@v1
-        with:
-          reporter: plain
-          color: true
-----
-
 === `debug`: enabling debug logging
 
 * Default: `false`
@@ -293,7 +228,7 @@ Debug logging can be enabled by setting the `debug` input parameter to `true`:
 
 [source,yaml]
 ----
-      - uses: saveourtool/benedikt@v1
+      - uses: saveourtool/benedikt@v2
         with:
           debug: true
 ----
@@ -314,7 +249,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - id: diktat
-        uses: saveourtool/benedikt@v1
+        uses: saveourtool/benedikt@v2
 
       - name: 'Read the exit code of diKTat'
         if: ${{ always() }}
@@ -323,11 +258,4 @@ jobs:
 ----
 
 The exit codes are documented
-link:https://saveourtool.github.io/benedikt/docs/diktat-cli.html#exit-codes[here].
-
-[#diktat-cli]
-== Using the command-line client
-
-Alternatively, if you wish to run _diKTat_ locally (e. g.: as a _Vim_ plug-in),
-or you're using a different CI/CD server, you can try the
-link:https://saveourtool.github.io/benedikt/docs/diktat-cli.html[command-line client].
+link:https://diktat.saveourtool.com/diktat-cli/#exit-codes[here].
diff --git a/action.yml b/action.yml
index ed5bb0c..52f9589 100644
--- a/action.yml
+++ b/action.yml
@@ -18,8 +18,7 @@ inputs:
     required: false
   reporter:
     description: >
-      The reporter to use, one of: "plain", "plain?group_by_file", "json",
-      "sarif" (the default), "checkstyle", "html".
+      The reporter to use, one of: "sarif" (the default) or "checkstyle".
     default: 'sarif'
     required: false
   input-paths:
@@ -53,22 +52,11 @@ inputs:
       examples of supported syntax at
       <https://github.com/actions/setup-java/blob/main/README.md#supported-version-syntax>.
     required: false
-  color:
-    description: >
-      Colorize the output
-    default: ${{ true }}
-    required: false
   debug:
     description: >
       Whether debug logging should be enabled
     default: ${{ false }}
     required: false
-  relative-paths:
-    description: >
-      Relativize file paths with respect to the working directory (if false,
-      absolute file paths get reported)
-    default: ${{ true }}
-    required: false
   fail-on-error:
     description: >
       Whether linter errors are considered fatal (the default is true)
@@ -105,18 +93,26 @@ runs:
       # `steps.diktat.outputs.exit-code` variable.
     - id: diktat
       run: |
-        DIKTAT_ARGS=('--config', '${{ inputs.config }}', '--reporter', '${{ inputs.reporter }}')
-        if [[ '${{ inputs.color }}' != 'false' ]]
+        if [[ '${{ inputs.debug }}' == 'true' ]]
         then
-          DIKTAT_ARGS+=('--color-name')
+          set -x
         fi
-        if [[ '${{ inputs.debug }}' == 'true' ]]
+        DIKTAT_ARGS=('--config' '${{ inputs.config }}' '--reporter' '${{ inputs.reporter }}')
+        if [[ '${{ inputs.reporter }}' == 'sarif' ]]
+        then
+          report_file=${GITHUB_WORKSPACE}/report.sarif
+        elif [[ '${{ inputs.reporter }}' == 'checkstyle' ]]
         then
-          DIKTAT_ARGS+=('--log-level DEBUG')
+          report_file=${GITHUB_WORKSPACE}/checkstyle-report.xml
+        else
+          echo "<reporter> should be set to <sarif> or <checkstyle>"
+          exit 1
         fi
-        if [[ '${{ inputs.relative-paths }}' != 'false' ]]
+        DIKTAT_ARGS+=('--output' "${report_file}")
+
+        if [[ '${{ inputs.debug }}' == 'true' ]]
         then
-          DIKTAT_ARGS+=('--relative')
+          DIKTAT_ARGS+=('--log-level' 'DEBUG')
         fi
 
         set -o pipefail
@@ -125,7 +121,10 @@ runs:
         DIKTAT_CMD=${GITHUB_WORKSPACE}/diktat
         chmod +x ${DIKTAT_CMD}
         { ${DIKTAT_CMD} "${DIKTAT_ARGS[@]}" "${INPUT_PATHS[@]}" | tee diktat.log; } && exit_code=$? || exit_code=$?
-        echo "summary-line=$(tail -n1 diktat.log 2>/dev/null)" >>$GITHUB_OUTPUT
+        total_lines=$(wc -l diktat.log | cut -d ' ' -f1)
+        summary_line_number=$(grep -n 'Summary error count (descending) by rule:' diktat.log | cut -d: -f1)
+        summary_line=$(tail -n $((total_lines - summary_line_number)) diktat.log | sed -e 's/^  //g' | awk '{ printf("%s,", $0) }' | sed -e 's/,$//g')
+        echo "summary-line=${summary_line}" >>$GITHUB_OUTPUT
         rm -f diktat.log
         echo "exit-code=${exit_code}" >>$GITHUB_OUTPUT
       env:
@@ -159,7 +158,7 @@ runs:
         if (( ${{ steps.diktat.outputs.exit-code }} != 0 ))
         then
           echo '```console' >>${GITHUB_STEP_SUMMARY}
-          echo "${{ steps.diktat.outputs.summary-line }}" >>${GITHUB_STEP_SUMMARY}
+          echo "${{ steps.diktat.outputs.summary-line }}" | xargs -d ',' -n1 echo >>${GITHUB_STEP_SUMMARY}
           echo '```' >>${GITHUB_STEP_SUMMARY}
         fi
 
@@ -180,9 +179,9 @@ runs:
       # When in SARIF reporting mode, upload SARIF reports to GitHub.
     - id: upload-sarif
       if: ${{ always() && steps.diktat.outputs.exit-code == 1 && inputs.reporter == 'sarif' }}
-      uses: github/codeql-action/upload-sarif@v2
+      uses: github/codeql-action/upload-sarif@v3
       with:
-        sarif_file: ${{ github.workspace }}
+        sarif_file: ${{ github.workspace }}/report.sarif
 
       # Alternatively, when in Checkstyle reporting mode, upload Checkstyle XML
       # using `reviewdog`.
@@ -205,7 +204,7 @@ runs:
           reviewdog_reporter='github-check'
         fi
 
-        reviewdog -f=checkstyle -fail-on-error=false -level=info -name='diKTat errors reported by reviewdog' -reporter="${reviewdog_reporter}" <checkstyle-report.xml
+        reviewdog -f=checkstyle -fail-on-error=false -level=info -name='diKTat errors reported by reviewdog' -reporter="${reviewdog_reporter}" <${GITHUB_WORKSPACE}/checkstyle-report.xml
       env:
         REVIEWDOG_GITHUB_API_TOKEN: ${{ github.token }}
       shell: bash
diff --git a/docs/diktat-cli.adoc b/docs/diktat-cli.adoc
deleted file mode 100644
index 8c5c4d7..0000000
--- a/docs/diktat-cli.adoc
+++ /dev/null
@@ -1,111 +0,0 @@
-= _diktat-cli_, the command-line client for https://github.com/saveourtool/diktat[_diKTat_]
-:toc:
-
-[#features]
-== Features
-
-* Written in _UNIX Shell_ (~500 lines of code)
-* BSD-compatible
-* Also works in Windows (_Git Bash_, _Cygwin_, or _MSys2_)
-* Automatically downloads `ktlint` and `diktat` far JARs
-* Accepts all essential `ktlint` command-line arguments
-
-[#usage]
-== Usage
-
-[source,bash]
-----
-diktat [OPTION]... [FILE]...
-----
-
-[#options]
-== Option summary
-
-.Options
-[cols="1,3"]
-|===
-| Command-line switch | Meaning
-
-| `-c CONFIG`, `--config=CONFIG`
-| Specify the location of the YAML configuration file. By default,
-`diktat-analysis.yml` in the current directory is used.
-
-| `-r REPORTER`, `--reporter=REPORTER`
-| The reporter to use, one of: `plain` (the default), `plain?group_by_file`,
-`json`, `sarif`, `checkstyle`, `html`.
-
-| `-o OUTPUT`, `--output=OUTPUT`
-| Redirect the reporter output to a file. Use `-o -` to force using the standard
-output.
-
-| `--color`
-| Colorize the output.
-
-| `--relative`
-| Relativize file paths with respect to the working directory. By default,
-absolute file paths get reported.
-
-| `--no-download-progress`
-| Do not show the progress bar as the binaries get downloaded.
-
-| `-d`, `--debug`
-| Enable the debug output.
-
-| `-h`, `--help`
-| Display the help text and exit.
-
-| `-l`, `--license`
-| Display the license and exit.
-
-| `-v`, `--verbose`
-|Enable the verbose output.
-
-| `-V`, `--version`
-|Output version information and exit.
-|===
-
-[#exit-codes]
-== Exit codes
-
-.Exit codes
-[cols="1,3,1"]
-|===
-| Exit code | Meaning | Treated as a failure
-
-| 0
-| _diKTat_ found no errors in your code
-| **No**
-
-| 1
-| _diKTat_ reported some errors in your code
-| Depends on the `fail-on-error` input parameter, the default is **Yes**
-
-| 2
-| The JVM was not found (probably, you need to set up the JVM explicitly, using
-the `java-distribution` and `java-version` input parameters)
-| **Yes**
-
-| 3
-| Failure while downloading dependencies
-| **Yes**
-
-| 4
-| Unsupported command-line switch
-| **Yes**
-
-| 5
-| _diKTat_ JAR was not found
-| **Yes**
-
-| 6
-| A command-line switch requires an argument
-| **Yes**
-
-| 7
-| No source files to check were found
-| **Yes**
-
-| 8
-| Incompatible _Bash_ version
-| **Yes**
-|===