diff --git a/COPYING b/COPYING
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--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc.
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
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+above cannot 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.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+
+ Copyright (C)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ Copyright (C)
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+.
diff --git a/LICENSE b/COPYING.LESSER
similarity index 98%
rename from LICENSE
rename to COPYING.LESSER
index 31afd6d..0a04128 100644
--- a/LICENSE
+++ b/COPYING.LESSER
@@ -1,7 +1,7 @@
- GNU LESSER GENERAL PUBLIC LICENSE
+ GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007 Free Software Foundation, Inc.
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
diff --git a/README.md b/README.md
index d28dfde..4ef20f6 100644
--- a/README.md
+++ b/README.md
@@ -93,19 +93,36 @@ The implementation test suite lives in [syndicate/test/](syndicate/test/). Run i
raco setup syndicate; raco test -p syndicate
-## Copyright and License
+## Distribution
-Copyright © Tony Garnock-Jones 2010–2021.
+### License
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU Lesser 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 under the terms of the [LGPLv3
+license](https://opensource.org/licenses/lgpl-3.0.html) or 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 Lesser General Public License for more details.
+Documentation is distributed under the terms of the [CC BY 4.0
+license](https://creativecommons.org/licenses/by/4.0/).
- You should have received a copy of the GNU Lesser General Public License
- along with this program. If not, see .
+### Authors
+
+* Tony Garnock-Jones
+
+### Contributors
+
+Contributors can be found inspecting the history of the source control
+repository.
+
+### How to contribute
+
+As contributor, you retain the copyright of your work, but it must be
+distributed using the same license of this software. For minor patches like bug
+fixes, typos corrections, improvements in the documentation, this will be
+implicit, and it will be documented in the history of the source control
+repository. In case of major contributions, you must also update the header of the
+modified source code files, specifying something like this:
+
+```
+SPDX-License-Identifier: LGPL-3.0-or-later
+Copyright (C) 2019-2021 Previous Author
+Copyright (C) YYYY-YYYY New Contributor
+```
diff --git a/historical/prototype.rkt b/historical/prototype.rkt
index 6a5f111..059cd7d 100644
--- a/historical/prototype.rkt
+++ b/historical/prototype.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(provide (all-defined-out))
diff --git a/syndicate-examples/box-and-client.rkt b/syndicate-examples/box-and-client.rkt
index d5c18bd..c3481db 100644
--- a/syndicate-examples/box-and-client.rkt
+++ b/syndicate-examples/box-and-client.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Simple mutable box and count-to-infinity box client.
diff --git a/syndicate-examples/chat-client.rkt b/syndicate-examples/chat-client.rkt
index eb8a3a4..e25aca4 100644
--- a/syndicate-examples/chat-client.rkt
+++ b/syndicate-examples/chat-client.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/drivers/tcp)
diff --git a/syndicate-examples/chat-server-nested-dataspace.rkt b/syndicate-examples/chat-server-nested-dataspace.rkt
index ceb24d3..2d7b862 100644
--- a/syndicate-examples/chat-server-nested-dataspace.rkt
+++ b/syndicate-examples/chat-server-nested-dataspace.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/drivers/tcp)
diff --git a/syndicate-examples/chat-server.rkt b/syndicate-examples/chat-server.rkt
index cfd8ec1..5736e3d 100644
--- a/syndicate-examples/chat-server.rkt
+++ b/syndicate-examples/chat-server.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/drivers/tcp)
diff --git a/syndicate-examples/echo.rkt b/syndicate-examples/echo.rkt
index 7d571cc..d74b1b0 100644
--- a/syndicate-examples/echo.rkt
+++ b/syndicate-examples/echo.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/drivers/tcp)
diff --git a/syndicate-examples/filesystem.rkt b/syndicate-examples/filesystem.rkt
index 6baecc9..21aea16 100644
--- a/syndicate-examples/filesystem.rkt
+++ b/syndicate-examples/filesystem.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/drivers/external-event)
diff --git a/syndicate-examples/gl-2d-basic.rkt b/syndicate-examples/gl-2d-basic.rkt
index d9d53b3..e390199 100644
--- a/syndicate-examples/gl-2d-basic.rkt
+++ b/syndicate-examples/gl-2d-basic.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require racket/set)
diff --git a/syndicate-examples/gl-2d-clock-face.rkt b/syndicate-examples/gl-2d-clock-face.rkt
index 3ba28e3..43f46fc 100644
--- a/syndicate-examples/gl-2d-clock-face.rkt
+++ b/syndicate-examples/gl-2d-clock-face.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Compare to "ezd" clock-face example from: J. F. Bartlett, “Don’t
;; Fidget with Widgets, Draw!,” Palo Alto, California, DEC WRL
diff --git a/syndicate-examples/gl-2d-many.rkt b/syndicate-examples/gl-2d-many.rkt
index 462dec7..9d3da1d 100644
--- a/syndicate-examples/gl-2d-many.rkt
+++ b/syndicate-examples/gl-2d-many.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Multiple animated sprites.
;;
diff --git a/syndicate-examples/gl-2d-platformer.rkt b/syndicate-examples/gl-2d-platformer.rkt
index d28a9e3..55bfd91 100644
--- a/syndicate-examples/gl-2d-platformer.rkt
+++ b/syndicate-examples/gl-2d-platformer.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require 2htdp/image)
diff --git a/syndicate-examples/gui/gui.rkt b/syndicate-examples/gui/gui.rkt
index 15eedee..b62c9e8 100644
--- a/syndicate-examples/gui/gui.rkt
+++ b/syndicate-examples/gui/gui.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require racket/set)
diff --git a/syndicate-examples/gui/hsv.rkt b/syndicate-examples/gui/hsv.rkt
index ba915a6..08ce4b1 100644
--- a/syndicate-examples/gui/hsv.rkt
+++ b/syndicate-examples/gui/hsv.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(provide fmod
diff --git a/syndicate-examples/gui/layout/layout.rkt b/syndicate-examples/gui/layout/layout.rkt
index 2f2e726..4565032 100644
--- a/syndicate-examples/gui/layout/layout.rkt
+++ b/syndicate-examples/gui/layout/layout.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; Tabular layout
diff --git a/syndicate-examples/gui/layout/main.rkt b/syndicate-examples/gui/layout/main.rkt
index 55fae0f..b37e50e 100644
--- a/syndicate-examples/gui/layout/main.rkt
+++ b/syndicate-examples/gui/layout/main.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; Layout, based loosely on TeX's boxes-and-glue model.
diff --git a/syndicate-examples/gui/layout/sizing.rkt b/syndicate-examples/gui/layout/sizing.rkt
index 283c542..f520fd7 100644
--- a/syndicate-examples/gui/layout/sizing.rkt
+++ b/syndicate-examples/gui/layout/sizing.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; Dimension sizing, based loosely on TeX's boxes-and-glue model.
diff --git a/syndicate-examples/info.rkt b/syndicate-examples/info.rkt
index 476c0a1..7a15ee4 100644
--- a/syndicate-examples/info.rkt
+++ b/syndicate-examples/info.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang setup/infotab
(define collection "syndicate-examples")
diff --git a/syndicate-examples/ircd/channel.rkt b/syndicate-examples/ircd/channel.rkt
index e145738..21da6de 100644
--- a/syndicate-examples/ircd/channel.rkt
+++ b/syndicate-examples/ircd/channel.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require "protocol.rkt")
diff --git a/syndicate-examples/ircd/config.rkt b/syndicate-examples/ircd/config.rkt
index be3784f..10225b9 100644
--- a/syndicate-examples/ircd/config.rkt
+++ b/syndicate-examples/ircd/config.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/reload)
diff --git a/syndicate-examples/ircd/dynamic-main.rkt b/syndicate-examples/ircd/dynamic-main.rkt
index b58e24c..dac303d 100644
--- a/syndicate-examples/ircd/dynamic-main.rkt
+++ b/syndicate-examples/ircd/dynamic-main.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/reload)
(spawn-reloader "config.rkt")
diff --git a/syndicate-examples/ircd/greeter.rkt b/syndicate-examples/ircd/greeter.rkt
index a38722c..640105d 100644
--- a/syndicate-examples/ircd/greeter.rkt
+++ b/syndicate-examples/ircd/greeter.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require "protocol.rkt")
diff --git a/syndicate-examples/ircd/main.rkt b/syndicate-examples/ircd/main.rkt
index 579f35d..be262dc 100644
--- a/syndicate-examples/ircd/main.rkt
+++ b/syndicate-examples/ircd/main.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/reload)
(spawn-reloader "dynamic-main.rkt")
diff --git a/syndicate-examples/ircd/message.rkt b/syndicate-examples/ircd/message.rkt
index 0d02e1e..1fcac76 100644
--- a/syndicate-examples/ircd/message.rkt
+++ b/syndicate-examples/ircd/message.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(provide (struct-out irc-message)
diff --git a/syndicate-examples/ircd/protocol.rkt b/syndicate-examples/ircd/protocol.rkt
index 32f8f2a..2731a34 100644
--- a/syndicate-examples/ircd/protocol.rkt
+++ b/syndicate-examples/ircd/protocol.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (struct-out ircd-listener)
diff --git a/syndicate-examples/ircd/session.rkt b/syndicate-examples/ircd/session.rkt
index 0811cdd..0ee4030 100644
--- a/syndicate-examples/ircd/session.rkt
+++ b/syndicate-examples/ircd/session.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require racket/set)
diff --git a/syndicate-examples/netstack/arp.rkt b/syndicate-examples/netstack/arp.rkt
index 5855f4b..1abf395 100644
--- a/syndicate-examples/netstack/arp.rkt
+++ b/syndicate-examples/netstack/arp.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; ARP protocol, http://tools.ietf.org/html/rfc826
;; Only does ARP-over-ethernet.
diff --git a/syndicate-examples/netstack/checksum.rkt b/syndicate-examples/netstack/checksum.rkt
index e34fc13..6623abc 100644
--- a/syndicate-examples/netstack/checksum.rkt
+++ b/syndicate-examples/netstack/checksum.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(provide ones-complement-sum16 ip-checksum)
diff --git a/syndicate-examples/netstack/configuration.rkt b/syndicate-examples/netstack/configuration.rkt
index 9759e18..9230e3d 100644
--- a/syndicate-examples/netstack/configuration.rkt
+++ b/syndicate-examples/netstack/configuration.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(provide (struct-out host-route)
diff --git a/syndicate-examples/netstack/demo-config.rkt b/syndicate-examples/netstack/demo-config.rkt
index 281a0dd..d2ddf66 100644
--- a/syndicate-examples/netstack/demo-config.rkt
+++ b/syndicate-examples/netstack/demo-config.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Demonstration stack configuration for various hosts.
diff --git a/syndicate-examples/netstack/dump-bytes.rkt b/syndicate-examples/netstack/dump-bytes.rkt
index 365e59d..c61f517 100644
--- a/syndicate-examples/netstack/dump-bytes.rkt
+++ b/syndicate-examples/netstack/dump-bytes.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; Copyright (C) 2012 Tony Garnock-Jones
;;
diff --git a/syndicate-examples/netstack/ethernet.rkt b/syndicate-examples/netstack/ethernet.rkt
index b753347..8b4d981 100644
--- a/syndicate-examples/netstack/ethernet.rkt
+++ b/syndicate-examples/netstack/ethernet.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Ethernet driver
diff --git a/syndicate-examples/netstack/fetchurl.rkt b/syndicate-examples/netstack/fetchurl.rkt
index f5daedd..1ee95c0 100644
--- a/syndicate-examples/netstack/fetchurl.rkt
+++ b/syndicate-examples/netstack/fetchurl.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate "ethernet.rkt")
diff --git a/syndicate-examples/netstack/ip.rkt b/syndicate-examples/netstack/ip.rkt
index e8c9cd4..729e9a7 100644
--- a/syndicate-examples/netstack/ip.rkt
+++ b/syndicate-examples/netstack/ip.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (struct-out ip-packet)
diff --git a/syndicate-examples/netstack/main.rkt b/syndicate-examples/netstack/main.rkt
index 5f14480..37f424d 100644
--- a/syndicate-examples/netstack/main.rkt
+++ b/syndicate-examples/netstack/main.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/drivers/timer)
diff --git a/syndicate-examples/netstack/port-allocator.rkt b/syndicate-examples/netstack/port-allocator.rkt
index e1bede8..985b44c 100644
--- a/syndicate-examples/netstack/port-allocator.rkt
+++ b/syndicate-examples/netstack/port-allocator.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; UDP/TCP port allocator
diff --git a/syndicate-examples/netstack/tcp.rkt b/syndicate-examples/netstack/tcp.rkt
index 3423e78..8471d42 100644
--- a/syndicate-examples/netstack/tcp.rkt
+++ b/syndicate-examples/netstack/tcp.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (struct-out tcp-connection)
diff --git a/syndicate-examples/netstack/udp.rkt b/syndicate-examples/netstack/udp.rkt
index 005ed92..1cd91da 100644
--- a/syndicate-examples/netstack/udp.rkt
+++ b/syndicate-examples/netstack/udp.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (struct-out udp-remote-address)
diff --git a/syndicate-examples/santa.rkt b/syndicate-examples/santa.rkt
index eec7fee..e6f222d 100644
--- a/syndicate-examples/santa.rkt
+++ b/syndicate-examples/santa.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Santa Claus Problem
;; https://www.schoolofhaskell.com/school/advanced-haskell/beautiful-concurrency/4-the-santa-claus-problem
diff --git a/syndicate-examples/server-chat-client.rkt b/syndicate-examples/server-chat-client.rkt
index 286d9a8..9c19893 100644
--- a/syndicate-examples/server-chat-client.rkt
+++ b/syndicate-examples/server-chat-client.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/distributed)
diff --git a/syndicate-examples/simple-cross-layer.rkt b/syndicate-examples/simple-cross-layer.rkt
index 4399bd2..89bc0e8 100644
--- a/syndicate-examples/simple-cross-layer.rkt
+++ b/syndicate-examples/simple-cross-layer.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(assertion-struct greeting (text))
diff --git a/syndicate-examples/sqlite.rkt b/syndicate-examples/sqlite.rkt
index 200b3c1..d73827d 100644
--- a/syndicate-examples/sqlite.rkt
+++ b/syndicate-examples/sqlite.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/drivers/sqlite)
diff --git a/syndicate-examples/stdin-echo.rkt b/syndicate-examples/stdin-echo.rkt
index 480f20b..123cdaf 100644
--- a/syndicate-examples/stdin-echo.rkt
+++ b/syndicate-examples/stdin-echo.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/drivers/external-event)
diff --git a/syndicate-examples/time.rkt b/syndicate-examples/time.rkt
index 73fada7..0dd78f0 100644
--- a/syndicate-examples/time.rkt
+++ b/syndicate-examples/time.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/drivers/timer)
diff --git a/syndicate-examples/udp-echo.rkt b/syndicate-examples/udp-echo.rkt
index 6091258..b97423a 100644
--- a/syndicate-examples/udp-echo.rkt
+++ b/syndicate-examples/udp-echo.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/drivers/udp)
diff --git a/syndicate-examples/udp-multicast.rkt b/syndicate-examples/udp-multicast.rkt
index f21f768..e00b235 100644
--- a/syndicate-examples/udp-multicast.rkt
+++ b/syndicate-examples/udp-multicast.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/drivers/timer)
diff --git a/syndicate-examples/web-core.rkt b/syndicate-examples/web-core.rkt
index 8726b9d..5970569 100644
--- a/syndicate-examples/web-core.rkt
+++ b/syndicate-examples/web-core.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate syndicate/drivers/web)
diff --git a/syndicate/assertions.rkt b/syndicate/assertions.rkt
index 6719a57..ac8b903 100644
--- a/syndicate/assertions.rkt
+++ b/syndicate/assertions.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(provide message-struct
diff --git a/syndicate/bag.rkt b/syndicate/bag.rkt
index 451b13a..bed5c11 100644
--- a/syndicate/bag.rkt
+++ b/syndicate/bag.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; Bags and Deltas (which are Bags where item-counts can be negative).
diff --git a/syndicate/bin/syndicate-server-debug.rkt b/syndicate/bin/syndicate-server-debug.rkt
index 5af8120..5857533 100644
--- a/syndicate/bin/syndicate-server-debug.rkt
+++ b/syndicate/bin/syndicate-server-debug.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket
(module+ main
(require racket/logging)
diff --git a/syndicate/bin/syndicate-server.rkt b/syndicate/bin/syndicate-server.rkt
index a71310f..d286aff 100644
--- a/syndicate/bin/syndicate-server.rkt
+++ b/syndicate/bin/syndicate-server.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket
(module+ main
(dynamic-require '(submod syndicate/distributed main) #f))
diff --git a/syndicate/dataflow.rkt b/syndicate/dataflow.rkt
index 96a0215..a99ebf4 100644
--- a/syndicate/dataflow.rkt
+++ b/syndicate/dataflow.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; Simple lazy dataflow.
diff --git a/syndicate/dataspace.rkt b/syndicate/dataspace.rkt
index e01deb0..7717e18 100644
--- a/syndicate/dataspace.rkt
+++ b/syndicate/dataspace.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(provide make-dataspace ;; TODO: how to cleanly provide this?
diff --git a/syndicate/distributed.rkt b/syndicate/distributed.rkt
index 33e0095..c9b26dc 100644
--- a/syndicate/distributed.rkt
+++ b/syndicate/distributed.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (all-from-out "distributed/main.rkt"))
diff --git a/syndicate/distributed/buffer.rkt b/syndicate/distributed/buffer.rkt
index cb13797..468e945 100644
--- a/syndicate/distributed/buffer.rkt
+++ b/syndicate/distributed/buffer.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide make-buffer)
diff --git a/syndicate/distributed/client.rkt b/syndicate/distributed/client.rkt
index f8c0ec9..af86a5e 100644
--- a/syndicate/distributed/client.rkt
+++ b/syndicate/distributed/client.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide generic-client-session-facet)
diff --git a/syndicate/distributed/client/loopback.rkt b/syndicate/distributed/client/loopback.rkt
index c95e4f6..f5d9659 100644
--- a/syndicate/distributed/client/loopback.rkt
+++ b/syndicate/distributed/client/loopback.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require "../client.rkt")
diff --git a/syndicate/distributed/client/tcp.rkt b/syndicate/distributed/client/tcp.rkt
index 563651f..99330f0 100644
--- a/syndicate/distributed/client/tcp.rkt
+++ b/syndicate/distributed/client/tcp.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require "../client.rkt")
diff --git a/syndicate/distributed/federation.rkt b/syndicate/distributed/federation.rkt
index b47d6b9..004dd07 100644
--- a/syndicate/distributed/federation.rkt
+++ b/syndicate/distributed/federation.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Relays for federation, both "client" (outbound) and "server" (inbound) ends.
diff --git a/syndicate/distributed/heartbeat.rkt b/syndicate/distributed/heartbeat.rkt
index 124ba49..d42e0b2 100644
--- a/syndicate/distributed/heartbeat.rkt
+++ b/syndicate/distributed/heartbeat.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide heartbeat)
diff --git a/syndicate/distributed/internal-protocol.rkt b/syndicate/distributed/internal-protocol.rkt
index f3709e7..823de39 100644
--- a/syndicate/distributed/internal-protocol.rkt
+++ b/syndicate/distributed/internal-protocol.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Internal server and federation protocol
diff --git a/syndicate/distributed/main.rkt b/syndicate/distributed/main.rkt
index 4ac427f..1be0bce 100644
--- a/syndicate/distributed/main.rkt
+++ b/syndicate/distributed/main.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (all-from-out "protocol.rkt")
diff --git a/syndicate/distributed/protocol.rkt b/syndicate/distributed/protocol.rkt
index cadcb2e..f3c438c 100644
--- a/syndicate/distributed/protocol.rkt
+++ b/syndicate/distributed/protocol.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (all-defined-out))
diff --git a/syndicate/distributed/server.rkt b/syndicate/distributed/server.rkt
index dd1f7f0..f5dc295 100644
--- a/syndicate/distributed/server.rkt
+++ b/syndicate/distributed/server.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require "wire-protocol.rkt")
diff --git a/syndicate/distributed/server/tcp.rkt b/syndicate/distributed/server/tcp.rkt
index 6adfca4..a2d799f 100644
--- a/syndicate/distributed/server/tcp.rkt
+++ b/syndicate/distributed/server/tcp.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide server-facet/tcp
diff --git a/syndicate/distributed/server/websocket.rkt b/syndicate/distributed/server/websocket.rkt
index bd7c818..daf4293 100644
--- a/syndicate/distributed/server/websocket.rkt
+++ b/syndicate/distributed/server/websocket.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide server-facet/websocket
diff --git a/syndicate/distributed/turn.rkt b/syndicate/distributed/turn.rkt
index 8bbe06c..66d9b4f 100644
--- a/syndicate/distributed/turn.rkt
+++ b/syndicate/distributed/turn.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide turn-recorder
diff --git a/syndicate/distributed/wire-protocol.rkt b/syndicate/distributed/wire-protocol.rkt
index bfbb973..d4bd477 100644
--- a/syndicate/distributed/wire-protocol.rkt
+++ b/syndicate/distributed/wire-protocol.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (all-defined-out))
diff --git a/syndicate/drivers/config.rkt b/syndicate/drivers/config.rkt
index 22035ae..cdb8cd8 100644
--- a/syndicate/drivers/config.rkt
+++ b/syndicate/drivers/config.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Monitor configuration files.
diff --git a/syndicate/drivers/external-event.rkt b/syndicate/drivers/external-event.rkt
index 01b4484..7355bef 100644
--- a/syndicate/drivers/external-event.rkt
+++ b/syndicate/drivers/external-event.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (struct-out external-event))
diff --git a/syndicate/drivers/filesystem.rkt b/syndicate/drivers/filesystem.rkt
index 2de94ce..9ff65a6 100644
--- a/syndicate/drivers/filesystem.rkt
+++ b/syndicate/drivers/filesystem.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Filesystem change monitor driver
diff --git a/syndicate/drivers/gl-2d.rkt b/syndicate/drivers/gl-2d.rkt
index d438396..d69ede6 100644
--- a/syndicate/drivers/gl-2d.rkt
+++ b/syndicate/drivers/gl-2d.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (struct-out window)
diff --git a/syndicate/drivers/gl-2d/affine.rkt b/syndicate/drivers/gl-2d/affine.rkt
index f27ef7a..75241f8 100644
--- a/syndicate/drivers/gl-2d/affine.rkt
+++ b/syndicate/drivers/gl-2d/affine.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; 2D affine transformation matrices.
diff --git a/syndicate/drivers/gl-2d/texture.rkt b/syndicate/drivers/gl-2d/texture.rkt
index 451a7a7..f337351 100644
--- a/syndicate/drivers/gl-2d/texture.rkt
+++ b/syndicate/drivers/gl-2d/texture.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/gui
(provide texture%
diff --git a/syndicate/drivers/sqlite.rkt b/syndicate/drivers/sqlite.rkt
index 33b1497..f94eeee 100644
--- a/syndicate/drivers/sqlite.rkt
+++ b/syndicate/drivers/sqlite.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; SQLite driver
diff --git a/syndicate/drivers/tcp.rkt b/syndicate/drivers/tcp.rkt
index 3ecc6da..e86266f 100644
--- a/syndicate/drivers/tcp.rkt
+++ b/syndicate/drivers/tcp.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; TCP/IP driver interface.
;;
diff --git a/syndicate/drivers/timer.rkt b/syndicate/drivers/timer.rkt
index 20c4256..f4fa52d 100644
--- a/syndicate/drivers/timer.rkt
+++ b/syndicate/drivers/timer.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Timer driver.
diff --git a/syndicate/drivers/udp.rkt b/syndicate/drivers/udp.rkt
index bbeb18c..8b97e2b 100644
--- a/syndicate/drivers/udp.rkt
+++ b/syndicate/drivers/udp.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (struct-out udp-remote-address)
diff --git a/syndicate/drivers/web.rkt b/syndicate/drivers/web.rkt
index 1be322a..1c436ab 100644
--- a/syndicate/drivers/web.rkt
+++ b/syndicate/drivers/web.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (struct-out http-server)
diff --git a/syndicate/event-expander.rkt b/syndicate/event-expander.rkt
index 1113869..d70219c 100644
--- a/syndicate/event-expander.rkt
+++ b/syndicate/event-expander.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(require auxiliary-macro-context)
diff --git a/syndicate/functional-queue.rkt b/syndicate/functional-queue.rkt
index aacb7dd..1a58390 100644
--- a/syndicate/functional-queue.rkt
+++ b/syndicate/functional-queue.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(provide make-queue
diff --git a/syndicate/ground.rkt b/syndicate/ground.rkt
index 6dde3f2..be1c314 100644
--- a/syndicate/ground.rkt
+++ b/syndicate/ground.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; Breaking the infinite tower of nested dataspaces, connecting to Racket at the fracture line.
diff --git a/syndicate/info.rkt b/syndicate/info.rkt
index 01f06ce..3dae772 100644
--- a/syndicate/info.rkt
+++ b/syndicate/info.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang setup/infotab
(define collection "syndicate")
(define racket-launcher-names
diff --git a/syndicate/lang.rkt b/syndicate/lang.rkt
index 6bd003c..dcb8848 100644
--- a/syndicate/lang.rkt
+++ b/syndicate/lang.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(provide (rename-out [module-begin #%module-begin])
diff --git a/syndicate/main.rkt b/syndicate/main.rkt
index 78dc0af..0bc903c 100644
--- a/syndicate/main.rkt
+++ b/syndicate/main.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(provide (all-from-out "dataspace.rkt")
diff --git a/syndicate/mc/mc-chat-client.rkt b/syndicate/mc/mc-chat-client.rkt
index 1049061..ce482b7 100644
--- a/syndicate/mc/mc-chat-client.rkt
+++ b/syndicate/mc/mc-chat-client.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(require/activate "udp-dataspace.rkt")
diff --git a/syndicate/mc/udp-dataspace.rkt b/syndicate/mc/udp-dataspace.rkt
index eb40604..5f3f9f6 100644
--- a/syndicate/mc/udp-dataspace.rkt
+++ b/syndicate/mc/udp-dataspace.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (struct-out mcds-inbound)
diff --git a/syndicate/pattern-expander.rkt b/syndicate/pattern-expander.rkt
index dfd1c4d..5d403b3 100644
--- a/syndicate/pattern-expander.rkt
+++ b/syndicate/pattern-expander.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(require auxiliary-macro-context)
diff --git a/syndicate/pattern.rkt b/syndicate/pattern.rkt
index 87eee22..7d9bd33 100644
--- a/syndicate/pattern.rkt
+++ b/syndicate/pattern.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(provide (struct-out discard)
diff --git a/syndicate/protocol/credit.rkt b/syndicate/protocol/credit.rkt
index 67b8dce..a0873b2 100644
--- a/syndicate/protocol/credit.rkt
+++ b/syndicate/protocol/credit.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
(provide (all-defined-out))
diff --git a/syndicate/protocol/instance.rkt b/syndicate/protocol/instance.rkt
index 91e815e..0ce2c69 100644
--- a/syndicate/protocol/instance.rkt
+++ b/syndicate/protocol/instance.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; "Instance" protocol for discriminating among
;; otherwise-indistinguishable entities.
diff --git a/syndicate/reassert.rkt b/syndicate/reassert.rkt
index 7cb02ee..455194e 100644
--- a/syndicate/reassert.rkt
+++ b/syndicate/reassert.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Re-assert an assertion when one of a set of triggering events is seen, after a delay.
;; Building block for building reconnection strategies.
diff --git a/syndicate/reflection.rkt b/syndicate/reflection.rkt
index d5bfcd0..7c2b719 100644
--- a/syndicate/reflection.rkt
+++ b/syndicate/reflection.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; Reflective protocols
diff --git a/syndicate/relay.rkt b/syndicate/relay.rkt
index 913b691..cab72b4 100644
--- a/syndicate/relay.rkt
+++ b/syndicate/relay.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; Cross-layer relaying between adjacent dataspaces
;; TODO: protocol for *clean* shutdown of a dataspace
diff --git a/syndicate/reload.rkt b/syndicate/reload.rkt
index a13efc2..b086eb4 100644
--- a/syndicate/reload.rkt
+++ b/syndicate/reload.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Crude steps toward reloadable Syndicate modules
diff --git a/syndicate/skeleton.rkt b/syndicate/skeleton.rkt
index e9499c0..10c9291 100644
--- a/syndicate/skeleton.rkt
+++ b/syndicate/skeleton.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; "Skeletons" describe the indexed structure of a dataspace.
;; In particular, they efficiently connect assertions to matching interests.
diff --git a/syndicate/supervise.rkt b/syndicate/supervise.rkt
index 39ff6d3..d37cc40 100644
--- a/syndicate/supervise.rkt
+++ b/syndicate/supervise.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate
;; Extremely simple single-actor supervision
;; Vastly simplified compared to the available options in OTP
diff --git a/syndicate/support/bytes.rkt b/syndicate/support/bytes.rkt
index 0e3eaf5..151f2e5 100644
--- a/syndicate/support/bytes.rkt
+++ b/syndicate/support/bytes.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(provide bytes-index)
diff --git a/syndicate/support/hash.rkt b/syndicate/support/hash.rkt
index d9bdd48..e550b1e 100644
--- a/syndicate/support/hash.rkt
+++ b/syndicate/support/hash.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; Hash-table utilities that are not (yet) part of Racket
diff --git a/syndicate/support/struct.rkt b/syndicate/support/struct.rkt
index bc9694c..fd20ba7 100644
--- a/syndicate/support/struct.rkt
+++ b/syndicate/support/struct.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; Misc support routines not (yet) provided by racket itself
diff --git a/syndicate/syntax-classes.rkt b/syndicate/syntax-classes.rkt
index 31c0255..9595e52 100644
--- a/syndicate/syntax-classes.rkt
+++ b/syndicate/syntax-classes.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; Common syntax classes.
diff --git a/syndicate/syntax.rkt b/syndicate/syntax.rkt
index 5a757e2..b593539 100644
--- a/syndicate/syntax.rkt
+++ b/syndicate/syntax.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; DSL syntax over the API of dataspace.rkt
diff --git a/syndicate/term.rkt b/syndicate/term.rkt
index e62b7c7..42f5213 100644
--- a/syndicate/term.rkt
+++ b/syndicate/term.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
;; Like pattern.rkt, but for dynamic use rather than compile-time use.
diff --git a/syndicate/test-implementation.rkt b/syndicate/test-implementation.rkt
index f2dbe51..2bcaed7 100644
--- a/syndicate/test-implementation.rkt
+++ b/syndicate/test-implementation.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket
;; Test drivers for Syndicate implementation.
diff --git a/syndicate/test/core/abandon-actions-on-exn.rkt b/syndicate/test/core/abandon-actions-on-exn.rkt
index 7513d88..989ad19 100644
--- a/syndicate/test/core/abandon-actions-on-exn.rkt
+++ b/syndicate/test/core/abandon-actions-on-exn.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; Tests that pending actions are abandoned during a turn in which there is an exception
diff --git a/syndicate/test/core/clean-adhoc-on-termination.rkt b/syndicate/test/core/clean-adhoc-on-termination.rkt
index cf6c5ff..9a03223 100644
--- a/syndicate/test/core/clean-adhoc-on-termination.rkt
+++ b/syndicate/test/core/clean-adhoc-on-termination.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; Tests that adhoc assertions are always removed on termination, even
;; when being relayed across a dataspace boundary.
diff --git a/syndicate/test/core/complex-pattern.rkt b/syndicate/test/core/complex-pattern.rkt
index d85797a..4f619bd 100644
--- a/syndicate/test/core/complex-pattern.rkt
+++ b/syndicate/test/core/complex-pattern.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
(test-case
diff --git a/syndicate/test/core/correct-retraction-on-exn.rkt b/syndicate/test/core/correct-retraction-on-exn.rkt
index 91ba4cf..b007e17 100644
--- a/syndicate/test/core/correct-retraction-on-exn.rkt
+++ b/syndicate/test/core/correct-retraction-on-exn.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; Goal: no matter the circumstances (e.g. exception in a stop
;; script), we will never retract an assertion more or fewer than the
diff --git a/syndicate/test/core/death-during-startup.rkt b/syndicate/test/core/death-during-startup.rkt
index d01f86d..53a6525 100644
--- a/syndicate/test/core/death-during-startup.rkt
+++ b/syndicate/test/core/death-during-startup.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; An error signalled during setup of a new actor's root facet must
;; cause previous actions to be discarded, but must also cause any
diff --git a/syndicate/test/core/death-during-turn.rkt b/syndicate/test/core/death-during-turn.rkt
index a6c4b47..6f39ccb 100644
--- a/syndicate/test/core/death-during-turn.rkt
+++ b/syndicate/test/core/death-during-turn.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; An error signalled mid-turn must cause previous actions to be
;; discarded; discarded actions must not be observed by peers.
diff --git a/syndicate/test/core/double-cross-layer.rkt b/syndicate/test/core/double-cross-layer.rkt
index 9ccc6ea..6728da5 100644
--- a/syndicate/test/core/double-cross-layer.rkt
+++ b/syndicate/test/core/double-cross-layer.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
(test-case
diff --git a/syndicate/test/core/during-criterion-snapshotting.rkt b/syndicate/test/core/during-criterion-snapshotting.rkt
index 792ace6..adf38d7 100644
--- a/syndicate/test/core/during-criterion-snapshotting.rkt
+++ b/syndicate/test/core/during-criterion-snapshotting.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; See .../syndicate/examples/actor/example-during-criterion-shapshotting.rkt
diff --git a/syndicate/test/core/nesting-confusion-2.rkt b/syndicate/test/core/nesting-confusion-2.rkt
index b526ada..ae124c9 100644
--- a/syndicate/test/core/nesting-confusion-2.rkt
+++ b/syndicate/test/core/nesting-confusion-2.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; 2018-11-20 Prior to the commit that introduced this test case (and
;; fixed the bug it exposed), matching a constant/literal `(discard)`
diff --git a/syndicate/test/core/nesting-confusion.rkt b/syndicate/test/core/nesting-confusion.rkt
index 2feedf4..08206b8 100644
--- a/syndicate/test/core/nesting-confusion.rkt
+++ b/syndicate/test/core/nesting-confusion.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; Uhoh! The current (2018-05-02) scheme for relaying between
;; dataspaces instantiates each pattern when a matching assertion
diff --git a/syndicate/test/core/partial-retraction.rkt b/syndicate/test/core/partial-retraction.rkt
index 7d02c93..2ac370f 100644
--- a/syndicate/test/core/partial-retraction.rkt
+++ b/syndicate/test/core/partial-retraction.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; See .../racket/syndicate/examples/actor/example-partial-retraction.rkt
;; TODO: deal with permissible permutations in the output
diff --git a/syndicate/test/core/pending-changes.rkt b/syndicate/test/core/pending-changes.rkt
index f2d0e96..94993b2 100644
--- a/syndicate/test/core/pending-changes.rkt
+++ b/syndicate/test/core/pending-changes.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;;
;; In principle, we might like that actors within a turn should
diff --git a/syndicate/test/core/responsibility-transfer-1.rkt b/syndicate/test/core/responsibility-transfer-1.rkt
index 64b05ed..7c48ab3 100644
--- a/syndicate/test/core/responsibility-transfer-1.rkt
+++ b/syndicate/test/core/responsibility-transfer-1.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; See .../syndicate/examples/actor/example-responsibility-transfer-1.rkt
diff --git a/syndicate/test/core/responsibility-transfer-2.rkt b/syndicate/test/core/responsibility-transfer-2.rkt
index eb8f668..895ba0e 100644
--- a/syndicate/test/core/responsibility-transfer-2.rkt
+++ b/syndicate/test/core/responsibility-transfer-2.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; Suite of four related tests.
;; See .../syndicate/examples/actor/example-responsibility-transfer-2.rkt
diff --git a/syndicate/test/core/simple-addition.rkt b/syndicate/test/core/simple-addition.rkt
index f5f6485..c0d5194 100644
--- a/syndicate/test/core/simple-addition.rkt
+++ b/syndicate/test/core/simple-addition.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
(test-case
diff --git a/syndicate/test/core/simple-box-and-client.rkt b/syndicate/test/core/simple-box-and-client.rkt
index c262780..dad9491 100644
--- a/syndicate/test/core/simple-box-and-client.rkt
+++ b/syndicate/test/core/simple-box-and-client.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; Box-and-client
diff --git a/syndicate/test/core/simple-cross-layer.rkt b/syndicate/test/core/simple-cross-layer.rkt
index 12c9836..859c1cd 100644
--- a/syndicate/test/core/simple-cross-layer.rkt
+++ b/syndicate/test/core/simple-cross-layer.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
(test-case
diff --git a/syndicate/test/core/spawn-and-send.rkt b/syndicate/test/core/spawn-and-send.rkt
index 1a2b453..c5a0973 100644
--- a/syndicate/test/core/spawn-and-send.rkt
+++ b/syndicate/test/core/spawn-and-send.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; Test the "spawn and send" idiom, where event ordering is exploited
;; to ensure a listener is ready by the time a sent message is ready
diff --git a/syndicate/test/core/state-machine.rkt b/syndicate/test/core/state-machine.rkt
index 3b2345a..48e0bb0 100644
--- a/syndicate/test/core/state-machine.rkt
+++ b/syndicate/test/core/state-machine.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
(test-case
diff --git a/syndicate/test/core/supervise.rkt b/syndicate/test/core/supervise.rkt
index afa010a..31213c6 100644
--- a/syndicate/test/core/supervise.rkt
+++ b/syndicate/test/core/supervise.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; Simple tests of supervision functionality.
diff --git a/syndicate/test/distributed/nesting-confusion.rkt b/syndicate/test/distributed/nesting-confusion.rkt
index 51305e4..77f4d6a 100644
--- a/syndicate/test/distributed/nesting-confusion.rkt
+++ b/syndicate/test/distributed/nesting-confusion.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; Analogous to the `core/nesting-confusion.rkt` test case.
diff --git a/syndicate/test/distributed/observation-visibility.rkt b/syndicate/test/distributed/observation-visibility.rkt
index 47f93c4..18ae32a 100644
--- a/syndicate/test/distributed/observation-visibility.rkt
+++ b/syndicate/test/distributed/observation-visibility.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; A client observing some part of the server's dataspace should cause
;; creation of an assertion of observation in that server's dataspace.
diff --git a/syndicate/test/pattern-test.rkt b/syndicate/test/pattern-test.rkt
index 5e3f9fe..ee1c77d 100644
--- a/syndicate/test/pattern-test.rkt
+++ b/syndicate/test/pattern-test.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket
(module+ test
diff --git a/syndicate/test/raw-dataspace.rkt b/syndicate/test/raw-dataspace.rkt
index c9b4547..5cd5d85 100644
--- a/syndicate/test/raw-dataspace.rkt
+++ b/syndicate/test/raw-dataspace.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang racket/base
(require racket/set)
diff --git a/syndicate/test/speed/speed-box-and-client.rkt b/syndicate/test/speed/speed-box-and-client.rkt
index 084c14c..2b5cc27 100644
--- a/syndicate/test/speed/speed-box-and-client.rkt
+++ b/syndicate/test/speed/speed-box-and-client.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
(let ((N 25000))
diff --git a/syndicate/test/speed/speed-message-sending.rkt b/syndicate/test/speed/speed-message-sending.rkt
index 3e07d05..7c003d9 100644
--- a/syndicate/test/speed/speed-message-sending.rkt
+++ b/syndicate/test/speed/speed-message-sending.rkt
@@ -1,3 +1,6 @@
+; SPDX-License-Identifier: LGPL-3.0-or-later
+; Copyright (C) 2010-2021 Tony Garnock-Jones
+
#lang syndicate/test-implementation
;; Rough message send speed test