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+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> Everyone is
+permitted to copy and distribute verbatim copies of this license document, but
+changing it is not allowed.
+
+                            Preamble
+
+The GNU Affero General Public License is a free, copyleft license for software
+and other kinds of works, specifically designed to ensure cooperation with the
+community in the case of network server software.
+
+The licenses for most software and other practical works are designed to take
+away your freedom to share and change the works.  By contrast, our General
+Public Licenses are intended to guarantee your freedom to share and change all
+versions of a program--to make sure it remains free software for all its users.
+
+When we speak of free software, we are referring to freedom, not price.  Our
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+Developers that use our General Public Licenses protect your rights with two
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+A secondary benefit of defending all users' freedom is that improvements made
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+use of a modified version, on a publicly accessible server, gives the public
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+An older license, called the Affero General Public License and published by
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+be given local legal effect according to their terms, reviewing courts shall
+apply local law that most closely approximates an absolute waiver of all civil
+liability in connection with the Program, unless a warranty or assumption of
+liability accompanies a copy of the Program in return for a fee.
diff --git a/META6.json b/META6.json
new file mode 100644
index 0000000..c79705f
--- /dev/null
+++ b/META6.json
@@ -0,0 +1,16 @@
+{
+  "api": "0",
+  "auth": "",
+  "authors": [
+    "Patrick Spek <p.spek@tyil.nl>"
+  ],
+  "description": "A simple logging library for Raku",
+  "license": "AGPL-3.0",
+  "name": "Log",
+  "perl": "6.d",
+  "provides": {
+    "Log::Simple": "lib/Log/Simple.rakumod"
+  },
+  "source-url": "",
+  "version": "0.0.0"
+}
diff --git a/README.rakudoc b/README.rakudoc
new file mode 100644
index 0000000..0de8c38
--- /dev/null
+++ b/README.rakudoc
@@ -0,0 +1,41 @@
+=begin pod
+
+=NAME    Log
+=VERSION 0.0.0
+=AUTHOR  Patrick Spek <p.spek@tyil.nl>
+
+=head1 Description
+
+A simple implementation of the C<Log> library for the Raku programming
+language.
+
+=head1 Installation
+
+Install this module through L<zef|https://github.com/ugexe/zef>:
+
+=begin code :lang<sh>
+zef install Log
+=end code
+
+=head1 Documentation
+
+Documentation is written as L<Pod6|https://docs.raku.org/language/pod>
+documents, and can be read with the
+L<C<p6doc>|https://modules.raku.org/dist/p6doc:github:perl6> module.
+
+=begin input
+p6doc Log
+=end input
+
+At your option, you can also use prettier readers, such as
+L<C<App::Rakuman>|https://modules.raku.org/dist/App::Rakuman:cpan:TYIL>.
+
+=begin input
+rakuman Log
+=end input
+
+=head1 License
+
+This module is distributed under the terms of the AGPL-3.0.
+
+=end pod
diff --git a/lib/Log/Simple.rakumod b/lib/Log/Simple.rakumod
new file mode 100644
index 0000000..870edd0
--- /dev/null
+++ b/lib/Log/Simple.rakumod
@@ -0,0 +1,314 @@
+#! /usr/bin/env false
+
+use v6.d;
+
+use Log;
+use Log::Level;
+
+#| A simple implementation of Log.
+unit class Log::Simple is Log;
+
+#| An array of hashes. Each has must have a handle key, with an IO::Handle to
+#| print messages to. A level key with an integer to signify a Log::Level is
+#| also required.
+has @!outputs;
+
+#| A supplier to emit messages to.
+has Supplier $!messages;
+
+#| When enabled, include hostname in the log message. This can be useful when
+#| running the application redundantly in a cluster with centralized logging.
+has Bool $.hostname = False;
+
+#| Send an emergency message.
+multi method emergency (
+	#| The message to print.
+	Str:D $message,
+) {
+	$!messages.emit({
+		message => self!message('emergency', $message),
+		level => 0,
+	})
+}
+
+#| Send a formatted emergency message.
+multi method emergency (
+	#| A printf-style format string.
+	Str:D $format,
+
+	#| Arguments to substitute into the format string placeholders.
+	*@args,
+) {
+	$!messages.emit({
+		message => self!message('emergency', $format.sprintf(|@args)),
+		level => 0,
+	})
+}
+
+#| Send an alert message.
+multi method alert (
+	#| The message to print.
+	Str:D $message,
+) {
+	$!messages.emit({
+		message => self!message('alert', $message),
+		level => 1,
+	})
+}
+
+#| Send a formatted alert message.
+multi method alert (
+	#| A printf-style format string.
+	Str:D $format,
+
+	#| Arguments to substitute into the format string placeholders.
+	*@args,
+) {
+	$!messages.emit({
+		message => self!message('alert', $format.sprintf(|@args)),
+		level => 1,
+	})
+}
+
+#| Send a critical message.
+multi method critical (
+	#| The message to print.
+	Str:D $message,
+) {
+	$!messages.emit({
+		message => self!message('critical', $message),
+		level => 2,
+	})
+}
+
+#| Send a formatted critical message.
+multi method critical (
+	#| A printf-style format string.
+	Str:D $format,
+
+	#| Arguments to substitute into the format string placeholders.
+	*@args,
+) {
+	$!messages.emit({
+		message => self!message('critical', $format.sprintf(|@args)),
+		level => 2,
+	})
+}
+
+#| Send an error message.
+multi method error (
+	#| The message to print.
+	Str:D $message,
+) {
+	$!messages.emit({
+		message => self!message('error', $message),
+		level => 3,
+	})
+}
+
+#| Send a formatted error message.
+multi method error (
+	#| A printf-style format string.
+	Str:D $format,
+
+	#| Arguments to substitute into the format string placeholders.
+	*@args,
+) {
+	$!messages.emit({
+		message => self!message('error', $format.sprintf(|@args)),
+		level => 3,
+	})
+}
+
+#| Send a warning message.
+multi method warning (
+	#| The message to print.
+	Str:D $message,
+) {
+	$!messages.emit({
+		message => self!message('warning', $message),
+		level => 4,
+	})
+}
+
+#| Send a formatted warning message.
+multi method warning (
+	#| A printf-style format string.
+	Str:D $format,
+
+	#| Arguments to substitute into the format string placeholders.
+	*@args,
+) {
+	$!messages.emit({
+		message => self!message('warning', $format.sprintf(|@args)),
+		level => 4,
+	})
+}
+
+#| Send a notice message. This is the "normal" level to publish log entries on.
+multi method notice (
+	#| The message to print.
+	Str:D $message
+) {
+	$!messages.emit({
+		message => self!message('notice', $message),
+		level => 5,
+	})
+}
+
+#| Send a formatted notice message. This is the "normal" level to publish log
+#| entries on.
+multi method notice (
+	#| A printf-style format string.
+	Str:D $format,
+
+	#| Arguments to substitute into the format string placeholders.
+	*@args,
+) {
+	$!messages.emit({
+		message => self!message('notice', $format.sprintf(|@args)),
+		level => 5,
+	})
+}
+
+#| Send an informational message.
+multi method info (
+	#| The message to print.
+	Str:D $message
+) {
+	$!messages.emit({
+		message => self!message('info', $message),
+		level => 6,
+	})
+}
+
+#| Send a formatted informational message.
+multi method info (
+	#| The printf-style format string.
+	Str:D $format,
+
+	#| Arguments to substitute into the format string placeholders.
+	*@args,
+) {
+	$!messages.emit({
+		message => self!message('info', $format.sprintf(|@args)),
+		level => 6,
+	})
+}
+
+#| Send a debug message.
+multi method debug (
+	#| The message to print.
+	Str:D $message,
+) {
+	$!messages.emit({
+		message => self!message('debug', $message),
+		level => 7,
+	})
+}
+
+#| Send a formatted debug message.
+multi method debug (
+	#| A printf-style format string.
+	Str:D $format,
+
+	#| Arguments to substitute into the format string placeholders.
+	*@args,
+) {
+	$!messages.emit({
+		message => self!message('debug', $format.sprintf(|@args)),
+		level => 7,
+	})
+}
+
+#| Add an output to the logger.
+multi method add-output (
+	#| The IO::Handle to write log messages to.
+	IO::Handle:D $handle,
+
+	#| The log level for this particular stream.
+	Int() $level where Log::Level::Emergency ≤ * ≤ Log::Level::Debug,
+
+	#| A filter function to apply to any messages sent to the output.
+	Callable :$filter?,
+) {
+	@!outputs.push({
+		:$handle,
+		:$level,
+		:$filter,
+	});
+}
+
+#| Convenience method to get the callee name. This is the package name if one
+#| exists, or the source file name.
+method !callee (
+	#| The depth of which to get the callframe.
+	Int:D $depth = 3,
+
+	--> Str
+) {
+	my $file = callframe($depth).annotations<file>;
+
+	return $file unless $file.ends-with(')');
+
+	$file.words.tail.substr(1, *-1);
+}
+
+#| Convenience method for formatting the message as desired.
+method !message (
+	#| A human readable identifier for the level.
+	Str:D $level,
+
+	#| The original message to be logged.
+	Str:D $message,
+
+	--> Str
+) {
+	(
+		DateTime.now.utc,
+		($*KERNEL.hostname if $!hostname),
+		self!callee,
+		"<$level>",
+	)».Str.join(' ') ~ ": $message"
+}
+
+submethod TWEAK
+{
+	# Set up the Supply for messages.
+	$!messages .= new;
+	$!messages.Supply.tap(sub (%payload) {
+		@!outputs
+			.race
+			.grep(%payload<level> ≤ *<level>)
+			.grep({ $_<filter> ?? $_<filter>(%payload).so !! True })
+			.map(*<handle>.say(%payload<message>))
+			;
+	});
+}
+
+=begin pod
+
+=NAME    Log::Simple
+=VERSION 0.0.0
+=AUTHOR  Patrick Spek <p.spek@tyil.nl>
+
+=begin LICENSE
+Copyright © 2020
+
+This program is free software: you can redistribute it and/or modify it under
+the terms of the GNU Affero General Public License as published by the Free
+Software Foundation, either version 3 of the License, or (at your option) any
+later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+details.
+
+You should have received a copy of the GNU Affero General Public License along
+with this program.  If not, see http://www.gnu.org/licenses/.
+=end LICENSE
+
+=end pod
+
+# vim: ft=raku noet sw=8 ts=8