diff -rN -u old-cam_archiver/build.sbt new-cam_archiver/build.sbt
--- old-cam_archiver/build.sbt	1970-01-01 00:00:00.000000000 +0000
+++ new-cam_archiver/build.sbt	2025-07-04 01:42:09.320332660 +0000
@@ -0,0 +1,100 @@
+// *****************************************************************************
+// Build settings
+// *****************************************************************************
+
+addCommandAlias("check", "Compile/scalafix --check; Test/scalafix --check; scalafmtCheckAll")
+addCommandAlias("fix", "Compile/scalafix; Test/scalafix; scalafmtSbt; scalafmtAll")
+
+// Enable the semanticdb compiler plugin needed by the metals language server.
+Global / semanticdbEnabled := true
+
+inThisBuild(
+    Seq(
+        scalaVersion     := "3.3.6",
+        organization     := "de.jan0sch",
+        organizationName := "Contributors as noted in the AUTHORS.md file",
+        version          := "1.0.0",
+        scalacOptions ++= Seq(
+            "-deprecation",
+            "-explain",
+            "-explain-types",
+            "-feature",
+            "-language:higherKinds",
+            "-language:implicitConversions",
+            "-no-indent",  // Prevent usage of indent based syntax.
+            "-old-syntax", // Enforce classic syntax.
+            "-unchecked",
+            "-Wunused:imports",             // Warn on unused imports including given and wildcard imports.
+            "-Wunused:linted",              // TODO: Find out what this does!
+            "-Wunused:locals",              // Warn on unused local definitions.
+            "-Wunused:nowarn",              // Warn on unused (useless) `@nowarn` annotations.
+            "-Wunused:params",              // Warn on unused parameters.
+            "-Wunused:privates",            // Warn on unused private definitions.
+            "-Wunused:unsafe-warn-patvars", // TODO: Find out what this does!
+            "-Wvalue-discard",              // Warn on discarding computed values.
+            //"-Xfatal-warnings",             // NOTE: You might want to disable this when changing much!
+            "-Ykind-projector"
+        ),
+        scalafmtOnCompile := false,
+        bomFormat := "xml",
+        coverageExcludedPackages := "<empty>;.*\\.views\\.html.*;.*\\.views\\.txt.*;.*\\.views\\.xml.*;",
+        Test / fork              := true,
+        Test / parallelExecution := false,
+        Test / testOptions += Tests.Argument(TestFrameworks.MUnit, "-b")
+    )
+)
+
+// *****************************************************************************
+// Projects
+// *****************************************************************************
+
+lazy val cameraArchiver =
+    project
+        .in(file("."))
+        .enablePlugins(
+            DebianPlugin,
+            JavaAppPackaging
+        )
+        .settings(
+            name := "camera-archiver",
+            startYear := Option(2025),
+            libraryDependencies := Seq(
+                library.catsCore,
+                library.catsEffect,
+                library.decline,
+                library.declineEffect,
+                library.logback,
+                library.osLib,
+            )
+        )
+
+// *****************************************************************************
+// Library dependencies
+// *****************************************************************************
+
+lazy val library =
+    new {
+        object Version {
+            val cats             = "2.13.0"
+            val catsEffect       = "3.6.1"
+            val decline          = "2.5.0"
+            val logback          = "1.5.18"
+            val munit            = "1.1.1"
+            val munitCatsEffect  = "2.1.0"
+            val munitScalaCheck  = "1.1.0"
+            val osLib            = "0.11.4"
+            val scalaCheck       = "1.18.1"
+            val scalaCheckEffect = "1.0.4"
+        }
+        val catsCore             = "org.typelevel"  %% "cats-core"               % Version.cats
+        val catsEffect           = "org.typelevel"  %% "cats-effect"             % Version.catsEffect
+        val decline              = "com.monovore"   %% "decline"                 % Version.decline
+        val declineEffect        = "com.monovore"   %% "decline-effect"          % Version.decline
+        val logback              = "ch.qos.logback"  % "logback-classic"         % Version.logback
+        val munit                = "org.scalameta"  %% "munit"                   % Version.munit
+        val munitCatsEffect      = "org.typelevel"  %% "munit-cats-effect"       % Version.munitCatsEffect
+        val munitScalaCheck      = "org.scalameta"  %% "munit-scalacheck"        % Version.munitScalaCheck
+        val osLib                = "com.lihaoyi"    %% "os-lib"                  % Version.osLib
+        val scalaCheck           = "org.scalacheck" %% "scalacheck"              % Version.scalaCheck
+        val scalaCheckEffect     = "org.typelevel"  %% "scalacheck-effect-munit" % Version.scalaCheckEffect
+    }
diff -rN -u old-cam_archiver/.editorconfig new-cam_archiver/.editorconfig
--- old-cam_archiver/.editorconfig	1970-01-01 00:00:00.000000000 +0000
+++ new-cam_archiver/.editorconfig	2025-07-04 01:42:09.316332662 +0000
@@ -0,0 +1,25 @@
+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+# Matches multiple files with brace expansion notation
+
+# Scala
+[*.{scala,sbt,sc}]
+charset = utf-8
+indent_style = space
+indent_size = 4
+max_line_length = 120
+
+# Twirl
+[*.scala.{html,txt}]
+charset = utf-8
+indent_style = space
+indent_size = 2
+
diff -rN -u old-cam_archiver/LICENSE new-cam_archiver/LICENSE
--- old-cam_archiver/LICENSE	1970-01-01 00:00:00.000000000 +0000
+++ new-cam_archiver/LICENSE	2025-07-04 01:42:09.320332660 +0000
@@ -0,0 +1,287 @@
+                      EUROPEAN UNION PUBLIC LICENCE v. 1.2
+                      EUPL © the European Union 2007, 2016
+
+This European Union Public Licence (the ‘EUPL’) applies to the Work (as defined
+below) which is provided under the terms of this Licence. Any use of the Work,
+other than as authorised under this Licence is prohibited (to the extent such
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+
+The Work is provided under the terms of this Licence when the Licensor (as
+defined below) has placed the following notice immediately following the
+copyright notice for the Work:
+
+        Licensed under the EUPL
+
+or has expressed by any other means his willingness to license under the EUPL.
+
+1. Definitions
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+Copyleft clause: If the Licensee distributes or communicates copies of the
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+done under the terms of this Licence or of a later version of this Licence
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+Licence — for example by communicating ‘EUPL v. 1.2 only’. The Licensee
+(becoming Licensor) cannot offer or impose any additional terms or conditions on
+the Work or Derivative Work that alter or restrict the terms of the Licence.
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+Compatibility clause: If the Licensee Distributes or Communicates Derivative
+Works or copies thereof based upon both the Work and another work licensed under
+a Compatible Licence, this Distribution or Communication can be done under the
+terms of this Compatible Licence. For the sake of this clause, ‘Compatible
+Licence’ refers to the licences listed in the appendix attached to this Licence.
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+terms of this Licence.
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+
+For the above reason, the Work is provided under the Licence on an ‘as is’ basis
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+
+Similarly, you irrevocably accept this Licence and all of its terms and
+conditions by exercising any rights granted to You by Article 2 of this Licence,
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+Distribution or Communication by You of the Work or copies thereof.
+
+11. Information to the public
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+In case of any Distribution or Communication of the Work by means of electronic
+communication by You (for example, by offering to download the Work from a
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+regarding the Licensor, the Licence and the way it may be accessible, concluded,
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+12. Termination of the Licence
+
+The Licence and the rights granted hereunder will terminate automatically upon
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+
+Such a termination will not terminate the licences of any person who has
+received the Work from the Licensee under the Licence, provided such persons
+remain in full compliance with the Licence.
+
+13. Miscellaneous
+
+Without prejudice of Article 9 above, the Licence represents the complete
+agreement between the Parties as to the Work.
+
+If any provision of the Licence is invalid or unenforceable under applicable
+law, this will not affect the validity or enforceability of the Licence as a
+whole. Such provision will be construed or reformed so as necessary to make it
+valid and enforceable.
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+this Licence or updated versions of the Appendix, so far this is required and
+reasonable, without reducing the scope of the rights granted by the Licence. New
+versions of the Licence will be published with a unique version number.
+
+All linguistic versions of this Licence, approved by the European Commission,
+have identical value. Parties can take advantage of the linguistic version of
+their choice.
+
+14. Jurisdiction
+
+Without prejudice to specific agreement between parties,
+
+- any litigation resulting from the interpretation of this License, arising
+  between the European Union institutions, bodies, offices or agencies, as a
+  Licensor, and any Licensee, will be subject to the jurisdiction of the Court
+  of Justice of the European Union, as laid down in article 272 of the Treaty on
+  the Functioning of the European Union,
+
+- any litigation arising between other parties and resulting from the
+  interpretation of this License, will be subject to the exclusive jurisdiction
+  of the competent court where the Licensor resides or conducts its primary
+  business.
+
+15. Applicable Law
+
+Without prejudice to specific agreement between parties,
+
+- this Licence shall be governed by the law of the European Union Member State
+  where the Licensor has his seat, resides or has his registered office,
+
+- this licence shall be governed by Belgian law if the Licensor has no seat,
+  residence or registered office inside a European Union Member State.
+
+Appendix
+
+‘Compatible Licences’ according to Article 5 EUPL are:
+
+- GNU General Public License (GPL) v. 2, v. 3
+- GNU Affero General Public License (AGPL) v. 3
+- Open Software License (OSL) v. 2.1, v. 3.0
+- Eclipse Public License (EPL) v. 1.0
+- CeCILL v. 2.0, v. 2.1
+- Mozilla Public Licence (MPL) v. 2
+- GNU Lesser General Public Licence (LGPL) v. 2.1, v. 3
+- Creative Commons Attribution-ShareAlike v. 3.0 Unported (CC BY-SA 3.0) for
+  works other than software
+- European Union Public Licence (EUPL) v. 1.1, v. 1.2
+- Québec Free and Open-Source Licence — Reciprocity (LiLiQ-R) or Strong
+  Reciprocity (LiLiQ-R+).
+
+The European Commission may update this Appendix to later versions of the above
+licences without producing a new version of the EUPL, as long as they provide
+the rights granted in Article 2 of this Licence and protect the covered Source
+Code from exclusive appropriation.
+
+All other changes or additions to this Appendix require the production of a new
+EUPL version.
diff -rN -u old-cam_archiver/project/build.properties new-cam_archiver/project/build.properties
--- old-cam_archiver/project/build.properties	1970-01-01 00:00:00.000000000 +0000
+++ new-cam_archiver/project/build.properties	2025-07-04 01:42:09.320332660 +0000
@@ -0,0 +1 @@
+sbt.version = 1.11.0
diff -rN -u old-cam_archiver/project/plugins.sbt new-cam_archiver/project/plugins.sbt
--- old-cam_archiver/project/plugins.sbt	1970-01-01 00:00:00.000000000 +0000
+++ new-cam_archiver/project/plugins.sbt	2025-07-04 01:42:09.320332660 +0000
@@ -0,0 +1,11 @@
+// Compiler plugins
+addCompilerPlugin("org.scalameta" % "semanticdb-scalac" % "4.13.6" cross CrossVersion.full)
+// Regular plugins
+addSbtPlugin("com.github.sbt"  % "sbt-native-packager" % "1.11.1")
+addSbtPlugin("io.spray"        % "sbt-revolver"        % "0.10.0")
+addSbtPlugin("com.github.sbt" %% "sbt-sbom"            % "0.4.0")
+addSbtPlugin("ch.epfl.scala"   % "sbt-scalafix"        % "0.14.3")
+addSbtPlugin("org.scalameta"   % "sbt-scalafmt"        % "2.5.3")
+addSbtPlugin("org.scoverage"   % "sbt-scoverage"       % "2.3.1")
+// Needed to build debian packages via java (for sbt-native-packager).
+libraryDependencies += "org.vafer" % "jdeb" % "1.12" artifacts (Artifact("jdeb", "jar", "jar"))
diff -rN -u old-cam_archiver/README.md new-cam_archiver/README.md
--- old-cam_archiver/README.md	1970-01-01 00:00:00.000000000 +0000
+++ new-cam_archiver/README.md	2025-07-04 01:42:09.320332660 +0000
@@ -0,0 +1,12 @@
+# Camera Archiver
+
+A tool to copy camera files i.e. photos and videos from a source to a target
+folder sorting them into sub-folders by year and month.
+
+## System requirements
+
+- Java Runtime 17 or higher
+
+## Usage
+
+
diff -rN -u old-cam_archiver/.scalafix.conf new-cam_archiver/.scalafix.conf
--- old-cam_archiver/.scalafix.conf	1970-01-01 00:00:00.000000000 +0000
+++ new-cam_archiver/.scalafix.conf	2025-07-04 01:42:09.320332660 +0000
@@ -0,0 +1,42 @@
+rules = [
+  DisableSyntax
+  LeakingImplicitClassVal
+  NoValInForComprehension
+  OrganizeImports
+]
+
+DisableSyntax {
+  noAsInstanceOf = true
+  noDefaultArgs = true
+  noFinalVal = false
+  noFinalize = true
+  noIsInstanceOf = true
+  noNulls = true
+  noReturns = true
+  noThrows = true
+  noUniversalEquality = true
+  noValPatterns = true
+  noVars = true
+  noWhileLoops = true
+  noXml = false
+}
+
+OrganizeImports {
+  blankLines = Auto
+  coalesceToWildcardImportThreshold = null
+  expandRelative = false
+  groupExplicitlyImportedImplicitsSeparately = false // No effect for Scala 3
+  groupedImports = Explode // Have imports line by line to minimize merge conflicts.
+  groups = [
+    "re:javax?\\."
+	"*"
+	"munit."
+	"org.scalacheck."
+	"scala."
+  ]
+  importSelectorsOrder = Ascii
+  importsOrder = Ascii
+  preset = DEFAULT
+  removeUnused = false // Workaround for Scala 3
+  targetDialect = Scala3
+}
diff -rN -u old-cam_archiver/.scalafmt.conf new-cam_archiver/.scalafmt.conf
--- old-cam_archiver/.scalafmt.conf	1970-01-01 00:00:00.000000000 +0000
+++ new-cam_archiver/.scalafmt.conf	2025-07-04 01:42:09.320332660 +0000
@@ -0,0 +1,36 @@
+version        = "3.9.7"
+runner.dialect = scala3
+style          = "defaultWithAlign"
+# Other options...
+danglingParentheses.preset          = true
+indent.main                         = 4
+indent.significant                  = 4
+indent.callSite                     = 4
+indent.ctrlSite                     = 4
+indent.defnSite                     = 4
+indent.ctorSite                     = 4
+indent.matchSite                    = 4
+indent.caseSite                     = 4
+indent.extendSite                   = 4
+indent.withSiteRelativeToExtends    = 4
+indent.commaSiteRelativeToExtends   = 4
+indent.extraBeforeOpenParenDefnSite = 0
+indent.relativeToLhsLastLine        = [match, infix]
+indent.fewerBraces                  = "never"
+maxColumn                           = 120
+newlines.beforeOpenParenDefnSite    = null
+newlines.forceBeforeMultilineAssign = def
+project.excludePaths                = [
+  "glob:**/build.sbt",
+  "glob:**/project/plugins.sbt"
+]
+project.includePaths                = [
+    "glob:**/project/*.scala",
+    "glob:**/src/**.scala"
+]
+rewrite.rules                       = [RedundantBraces, RedundantParens]
+rewriteTokens                       = {
+    "⇒" = "=>"
+    "←" = "<-"
+    "→" = "->"
+}
diff -rN -u old-cam_archiver/src/main/scala/de/jan0sch/CameraArchiver.scala new-cam_archiver/src/main/scala/de/jan0sch/CameraArchiver.scala
--- old-cam_archiver/src/main/scala/de/jan0sch/CameraArchiver.scala	1970-01-01 00:00:00.000000000 +0000
+++ new-cam_archiver/src/main/scala/de/jan0sch/CameraArchiver.scala	2025-07-04 01:42:09.320332660 +0000
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2025 Contributors as noted in the AUTHORS.md file
+ *
+ * Licensed under the EUPL
+ */
+
+package de.jan0sch
+
+import cats.effect.*
+import cats.syntax.all.*
+import com.monovore.decline.*
+import com.monovore.decline.effect.*
+
+import scala.util.matching.Regex
+
+object CameraArchiver
+    extends CommandIOApp(
+        name = "camera-archiver",
+        header =
+            "Copy camera files i.e. photos and videos from a source to a target folder sorting them into sub-folders by year and month."
+    ) {
+    /* The regular expression used for validation of filenames and generation of the target sub-folders.
+     */
+    val CameraFileName: Regex = "(?iu)^(img|vid)?_?(\\d{4})[-_]?(\\d{2})[-_]?(\\d{2})[-_T]?.*$".r
+
+    val sourcePathOption =
+        Opts.option[java.nio.file.Path]("source", "The source folder path containing the camera files.")
+    val targetPathOption = Opts.option[java.nio.file.Path](
+        "target",
+        "The target folder path into which subfolders are to be created and populated with images and videos."
+    )
+    val verboseFlag = Opts.flag(long = "verbose", short = "v", help = "Enable more verbose ouput.").orFalse
+
+    override def main: Opts[IO[ExitCode]] =
+        (
+            sourcePathOption.map(path => os.Path(path.toAbsolutePath().toUri())),
+            targetPathOption.map(path => os.Path(path.toAbsolutePath().toUri())),
+            verboseFlag
+        ).mapN { case (sourcePath, targetPath, verbose) =>
+            for {
+                _     <- IO.whenA(verbose)(IO.println(s"Start archiving files from $sourcePath to $targetPath."))
+                files <- IO(
+                    os.walk(sourcePath)
+                        .filter(path => os.isFile(path, followLinks = false) && CameraFileName.matches(path.last))
+                )
+                groupedByTargetFolder = files.groupBy(path =>
+                    CameraFileName
+                        .findFirstMatchIn(path.last)
+                        .map(matcher => targetPath / s"${matcher.group(2)}-${matcher.group(3)}")
+                        .getOrElse(targetPath) // fallback to simple target path if year and month are not found
+                )
+                _ <- IO.whenA(verbose)(
+                    IO.println(
+                        s"Going to copy ${files.size} files into ${groupedByTargetFolder.keySet.size} target folders."
+                    )
+                )
+                _ <- groupedByTargetFolder.toList.traverse { (targetFolder, files) =>
+                    for {
+                        _ <- IO.whenA(verbose)(IO.println(s"Processing ${targetFolder.last}"))
+                        _ <- IO(os.makeDir.all(targetFolder))
+                        _ <- files.toList.traverse(file => IO(os.copy.into(from = file, to = targetFolder)))
+                    } yield ()
+                }
+                _ <- IO.whenA(verbose)(IO.println("Done."))
+            } yield ExitCode.Success
+        }
+}