diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
new file mode 100644
index 0000000..a362727
--- /dev/null
+++ b/.github/workflows/gradle.yml
@@ -0,0 +1,12 @@
+name: Build and check
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: gradle/wrapper-validation-action@v1
+      - uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+      - run: ./gradlew check
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..cd52965
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+# Gradle
+build/
+.gradle/
+
+# IDEA
+out/
+.idea/
+*.iml
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..3cc4f80
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2022 Damien O'Hara
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..249e583
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..8049c68
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..a69d9cb
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,240 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original 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.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..53a6b23
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,91 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/kapshot-plugin-kotlin/build.gradle.kts b/kapshot-plugin-kotlin/build.gradle.kts
new file mode 100644
index 0000000..c02923e
--- /dev/null
+++ b/kapshot-plugin-kotlin/build.gradle.kts
@@ -0,0 +1,28 @@
+repositories {
+    mavenCentral()
+}
+
+plugins {
+    kotlin("jvm") version "1.7.10"
+    kotlin("kapt") version "1.7.10"
+
+    `maven-publish`
+}
+
+group = "io.koalaql"
+version = "0.0.1"
+
+publishing {
+    publications {
+        create<MavenPublication>("default") {
+            from(components["java"])
+        }
+    }
+}
+
+dependencies {
+    compileOnly("org.jetbrains.kotlin:kotlin-compiler-embeddable")
+
+    kapt("com.google.auto.service:auto-service:1.0.1")
+    compileOnly("com.google.auto.service:auto-service-annotations:1.0.1")
+}
diff --git a/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/CapturedBlock.kt b/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/CapturedBlock.kt
new file mode 100644
index 0000000..2c57696
--- /dev/null
+++ b/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/CapturedBlock.kt
@@ -0,0 +1,7 @@
+package io.koalaql.kapshot
+
+fun interface CapturedBlock<T> {
+    operator fun invoke(): T
+
+    fun source(): String = TODO()
+}
diff --git a/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/CapturedBlocks.kt b/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/CapturedBlocks.kt
new file mode 100644
index 0000000..941e05e
--- /dev/null
+++ b/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/CapturedBlocks.kt
@@ -0,0 +1,6 @@
+package io.koalaql.kapshot
+
+fun <T> addSourceToBlock(block: CapturedBlock<T>, source: String): CapturedBlock<T> = object : CapturedBlock<T> {
+    override fun invoke(): T = block()
+    override fun source(): String = source
+}
\ No newline at end of file
diff --git a/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/plugin/CaptureTransformer.kt b/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/plugin/CaptureTransformer.kt
new file mode 100644
index 0000000..885c152
--- /dev/null
+++ b/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/plugin/CaptureTransformer.kt
@@ -0,0 +1,71 @@
+package io.koalaql.kapshot.plugin
+
+import org.jetbrains.kotlin.backend.common.IrElementTransformerVoidWithContext
+import org.jetbrains.kotlin.backend.common.extensions.IrPluginContext
+import org.jetbrains.kotlin.backend.common.lower.DeclarationIrBuilder
+import org.jetbrains.kotlin.backend.common.sourceElement
+import org.jetbrains.kotlin.ir.builders.irCall
+import org.jetbrains.kotlin.ir.builders.irString
+import org.jetbrains.kotlin.ir.declarations.IrClass
+import org.jetbrains.kotlin.ir.declarations.path
+import org.jetbrains.kotlin.ir.expressions.IrExpression
+import org.jetbrains.kotlin.ir.expressions.IrTypeOperator
+import org.jetbrains.kotlin.ir.expressions.IrTypeOperatorCall
+import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
+import org.jetbrains.kotlin.ir.types.IrSimpleType
+import org.jetbrains.kotlin.ir.util.kotlinFqName
+import java.io.File
+
+class CaptureTransformer(
+    private val context: IrPluginContext,
+    private val addSourceToBlock: IrSimpleFunctionSymbol,
+    private val captureBlockFqn: String = "io.koalaql.kapshot.CapturedBlock"
+): IrElementTransformerVoidWithContext() {
+    private fun transformSam(expression: IrTypeOperatorCall): IrExpression {
+        val symbol = currentScope!!.scope.scopeOwnerSymbol
+
+        val sourceElement = expression.sourceElement() ?: return super.visitTypeOperator(expression)
+
+        return with(DeclarationIrBuilder(context, symbol, expression.startOffset, expression.endOffset)) {
+            val addSourceCall = this.irCall(
+                addSourceToBlock,
+                expression.typeOperand
+            )
+
+            /* https://youtrack.jetbrains.com/issue/KT-41888 */
+            val fileText = File(currentFile.path).readText().replace("\r\n", "\n")
+
+            var startOffset = sourceElement.startOffset
+            var endOffset = sourceElement.endOffset
+
+            while (endOffset > startOffset && fileText[endOffset] != '}') endOffset--
+            while (startOffset < endOffset && fileText[startOffset - 1] != '{') startOffset++
+
+            val trimmed = fileText.substring(startOffset, endOffset).trimIndent().trim()
+
+            addSourceCall.putTypeArgument(0, context.irBuiltIns.stringType)
+
+            /* super call here rather than directly using expression is required to support nesting. otherwise we don't transform the subtree */
+            addSourceCall.putValueArgument(0, super.visitTypeOperator(expression))
+            addSourceCall.putValueArgument(1, irString(trimmed))
+
+            addSourceCall
+        }
+    }
+
+    override fun visitTypeOperator(expression: IrTypeOperatorCall): IrExpression {
+        if (expression.operator == IrTypeOperator.SAM_CONVERSION) {
+            when (val type = expression.type) {
+                is IrSimpleType -> {
+                    when (val owner = type.classifier.owner) {
+                        is IrClass -> if (owner.kotlinFqName.asString() == captureBlockFqn) {
+                            return transformSam(expression)
+                        }
+                    }
+                }
+            }
+        }
+
+        return super.visitTypeOperator(expression)
+    }
+}
diff --git a/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/plugin/GenerationExtension.kt b/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/plugin/GenerationExtension.kt
new file mode 100644
index 0000000..14ed467
--- /dev/null
+++ b/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/plugin/GenerationExtension.kt
@@ -0,0 +1,22 @@
+package io.koalaql.kapshot.plugin
+
+import org.jetbrains.kotlin.backend.common.extensions.IrGenerationExtension
+import org.jetbrains.kotlin.backend.common.extensions.IrPluginContext
+import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
+import org.jetbrains.kotlin.name.FqName
+
+class GenerationExtension(
+) : IrGenerationExtension {
+    override fun generate(moduleFragment: IrModuleFragment, pluginContext: IrPluginContext) {
+        val addSourceToBlock = pluginContext.referenceFunctions(FqName("io.koalaql.kapshot.addSourceToBlock"))
+            .first()
+
+        moduleFragment.transform(
+            CaptureTransformer(
+                pluginContext,
+                addSourceToBlock
+            ),
+            null
+        )
+    }
+}
diff --git a/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/plugin/Registrar.kt b/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/plugin/Registrar.kt
new file mode 100644
index 0000000..9f16a6c
--- /dev/null
+++ b/kapshot-plugin-kotlin/src/main/kotlin/io/koalaql/kapshot/plugin/Registrar.kt
@@ -0,0 +1,17 @@
+package io.koalaql.kapshot.plugin
+
+import com.google.auto.service.AutoService
+import org.jetbrains.kotlin.backend.common.extensions.IrGenerationExtension
+import org.jetbrains.kotlin.com.intellij.mock.MockProject
+import org.jetbrains.kotlin.compiler.plugin.ComponentRegistrar
+import org.jetbrains.kotlin.config.CompilerConfiguration
+
+@AutoService(ComponentRegistrar::class)
+class Registrar: ComponentRegistrar {
+    override fun registerProjectComponents(
+        project: MockProject,
+        configuration: CompilerConfiguration
+    ) {
+        IrGenerationExtension.registerExtension(project, GenerationExtension())
+    }
+}
diff --git a/kapshot-runtime/build.gradle.kts b/kapshot-runtime/build.gradle.kts
new file mode 100644
index 0000000..c7c98c3
--- /dev/null
+++ b/kapshot-runtime/build.gradle.kts
@@ -0,0 +1,20 @@
+repositories {
+    mavenCentral()
+}
+
+plugins {
+    kotlin("jvm") version "1.7.10"
+
+    `maven-publish`
+}
+
+group = "io.koalaql"
+version = "0.0.1"
+
+publishing {
+    publications {
+        create<MavenPublication>("default") {
+            from(components["java"])
+        }
+    }
+}
\ No newline at end of file
diff --git a/kapshot-runtime/src/main/kotlin/io/koalaql/kapshot/CapturedBlock.kt b/kapshot-runtime/src/main/kotlin/io/koalaql/kapshot/CapturedBlock.kt
new file mode 100644
index 0000000..2ba8dbc
--- /dev/null
+++ b/kapshot-runtime/src/main/kotlin/io/koalaql/kapshot/CapturedBlock.kt
@@ -0,0 +1,7 @@
+package io.koalaql.kapshot
+
+fun interface CapturedBlock<T> {
+    operator fun invoke(): T
+
+    fun source(): String = error("there is no source code for this block")
+}
diff --git a/kapshot-runtime/src/main/kotlin/io/koalaql/kapshot/CapturedBlocks.kt b/kapshot-runtime/src/main/kotlin/io/koalaql/kapshot/CapturedBlocks.kt
new file mode 100644
index 0000000..941e05e
--- /dev/null
+++ b/kapshot-runtime/src/main/kotlin/io/koalaql/kapshot/CapturedBlocks.kt
@@ -0,0 +1,6 @@
+package io.koalaql.kapshot
+
+fun <T> addSourceToBlock(block: CapturedBlock<T>, source: String): CapturedBlock<T> = object : CapturedBlock<T> {
+    override fun invoke(): T = block()
+    override fun source(): String = source
+}
\ No newline at end of file
diff --git a/plugin-gradle/build.gradle.kts b/plugin-gradle/build.gradle.kts
new file mode 100644
index 0000000..da46d32
--- /dev/null
+++ b/plugin-gradle/build.gradle.kts
@@ -0,0 +1,22 @@
+repositories {
+    mavenCentral()
+}
+
+plugins {
+    id("java-gradle-plugin")
+    kotlin("jvm") version "1.7.10"
+}
+
+dependencies {
+    implementation(kotlin("gradle-plugin-api"))
+}
+
+gradlePlugin {
+    plugins {
+        create("kapshotPlugin") {
+            id = "io.koalaql.kapshot-plugin"
+            displayName = "Kapshot Plugin"
+            implementationClass = "io.koalaql.kapshot.GradlePlugin"
+        }
+    }
+}
diff --git a/plugin-gradle/src/main/kotlin/io/koalaql/kapshot/GradlePlugin.kt b/plugin-gradle/src/main/kotlin/io/koalaql/kapshot/GradlePlugin.kt
new file mode 100644
index 0000000..b33c41e
--- /dev/null
+++ b/plugin-gradle/src/main/kotlin/io/koalaql/kapshot/GradlePlugin.kt
@@ -0,0 +1,37 @@
+package io.koalaql.kapshot
+
+import org.gradle.api.Project
+import org.gradle.api.provider.Provider
+import org.jetbrains.kotlin.gradle.plugin.KotlinCompilation
+import org.jetbrains.kotlin.gradle.plugin.KotlinCompilerPluginSupportPlugin
+import org.jetbrains.kotlin.gradle.plugin.SubpluginArtifact
+import org.jetbrains.kotlin.gradle.plugin.SubpluginOption
+
+class GradlePlugin : KotlinCompilerPluginSupportPlugin {
+    override fun isApplicable(kotlinCompilation: KotlinCompilation<*>): Boolean = true
+
+    override fun getCompilerPluginId(): String = "io.koalaql.kapshot-plugin"
+
+    override fun getPluginArtifact(): SubpluginArtifact = SubpluginArtifact(
+        groupId = "io.koalaql",
+        artifactId = "kapshot-plugin-kotlin",
+        version = "0.0.1"
+    )
+
+    override fun apply(target: Project) {
+        /* make sure we don't try to add dependency until it has been configured by kotlin plugin */
+        target.plugins.withId("org.jetbrains.kotlin.jvm") {
+            target.dependencies.add("implementation", "io.koalaql:kapshot-runtime:0.0.1")
+        }
+    }
+
+    override fun applyToCompilation(
+        kotlinCompilation: KotlinCompilation<*>
+    ): Provider<List<SubpluginOption>> {
+        val project = kotlinCompilation.target.project
+
+        return project.provider {
+          emptyList()
+        }
+    }
+}
diff --git a/settings.gradle.kts b/settings.gradle.kts
new file mode 100644
index 0000000..7ee535e
--- /dev/null
+++ b/settings.gradle.kts
@@ -0,0 +1,7 @@
+pluginManagement {
+    includeBuild("plugin-gradle")
+}
+
+includeBuild("kapshot-runtime")
+includeBuild("kapshot-plugin-kotlin")
+include("testing")
diff --git a/testing/build.gradle.kts b/testing/build.gradle.kts
new file mode 100644
index 0000000..2c781bb
--- /dev/null
+++ b/testing/build.gradle.kts
@@ -0,0 +1,20 @@
+plugins {
+    id("io.koalaql.kapshot-plugin")
+
+    kotlin("jvm") version "1.7.10"
+}
+
+group = "io.koalaql"
+version = "1.0-SNAPSHOT"
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation(kotlin("test"))
+}
+
+tasks.test {
+    useJUnitPlatform()
+}
diff --git a/testing/src/test/kotlin/CapturedBlockTests.kt b/testing/src/test/kotlin/CapturedBlockTests.kt
new file mode 100644
index 0000000..913daad
--- /dev/null
+++ b/testing/src/test/kotlin/CapturedBlockTests.kt
@@ -0,0 +1,72 @@
+import io.koalaql.kapshot.CapturedBlock
+import org.junit.jupiter.api.Test
+import kotlin.test.assertEquals
+
+class CapturedBlockTests {
+    fun <T : Any> expectCapture(
+        source: String,
+        result: T,
+        block: CapturedBlock<T>
+    ) {
+        assertEquals(result, block())
+        assertEquals(source, block.source())
+    }
+
+    @Test
+    fun `basic test cases`() {
+        expectCapture(
+            """5 + 7""",
+            5 + 7
+        ) { 5 + 7 }
+
+        expectCapture(
+"""val x = 10 + 5
+val y = x * x
+
+"" + (y + x)""",
+            "240",
+        ) {
+            val x = 10 + 5
+            val y = x * x
+
+            "" + (y + x)
+        }
+    }
+
+    @Suppress("MoveLambdaOutsideParentheses")
+    @Test
+    fun `explicit sam conversion support`() {
+        expectCapture(
+            """var i = 1
+
+while (i < 100) {
+    i *= 2
+}
+
+i""",
+            128,
+            CapturedBlock({
+                var i = 1
+
+                while (i < 100) {
+                    i *= 2
+                }
+
+                i
+            })
+        )
+    }
+
+    @Test
+    fun `capture nesting`() {
+        expectCapture("""
+            expectCapture("2 + 2", 4) {
+                2 + 2
+            }
+        """.trimIndent(), Unit) {
+            expectCapture("2 + 2", 4) {
+                2 + 2
+            }
+        }
+    }
+}
\ No newline at end of file