chore(license): an SPDX header on every source file that had none (LicenseRef-Starship-1.0) [skip ci]

The header scan (Captain Bob, 2026-11-10): 788 source files -- 351 with the
SL-1.0 header, 12 with the old name (docs/working/experiments, kept by
ruling), 31 under someone else's licence (tools/kconfig, Linux's, GPL-2.0:
kept), and 394 with none. Ruled: the SPDX form; capsules (.4th, .f18) and
proofs (.thy) left for a ruling of their own (mkcapsule's 64x16 block format,
content-addressed capsules).

253 files now begin
    SPDX-License-Identifier: LicenseRef-Starship-1.0
    Copyright (c) 2023-2026 Robert A. James
as a /* */ block (C, headers, assembly, linker scripts) or # lines (scripts,
Makefiles, Kconfig; below a shebang or a coding line); tools/mkcapsule.c,
which had the copyright line, gets the SPDX line only.

Not touched: docs/working/ (archive and old campaign material, as the
ruling kept the experiments); v4/system/post_cases.c (generated by
v4/tools/mkpost.py, "do not edit" -- the generator has the header).

Comments only: the kernel builds on amd64, aarch64, riscv64; make -C v4
test-32: 39 programs, 0 failures; every changed script parses.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GE3SDvQn5EoxdGufk84zz2

v4/src/asm.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* asm.c -- slot packer for test programs.  See asm.h. */
 #include "v4/asm.h"
 

v4/src/capsule.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* capsule.c -- a capsule of F18 code.  See capsule.h.
  *
  * Nothing here uses the C library.

v4/src/exec.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* exec.c -- instruction execution.  See exec.h.
  *
  * All cell arithmetic is done in v4_ucell and converted back.  Signed overflow

v4/src/fabric.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* fabric.c -- nodes, wiring, and time passing for all of them.  See fabric.h.
  *
  * Nothing here uses the C library: the bare-metal kernel links this file.

v4/src/guard.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* guard.c -- 5% safety boundaries.  See guard.h. */
 #include "v4/guard.h"
 

v4/src/heat.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* heat.c -- heat and anti-clock.  See heat.h. */
 #include "v4/heat.h"
 

v4/src/image.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* image.c -- the StarForth system, as its host knows it.  See image.h.
  *
  * Nothing here uses the C library: the bare-metal kernel links this file.

v4/src/iword.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* iword.c -- instruction-word decode.  See iword.h for the layout. */
 #include "v4/iword.h"
 

v4/src/manage.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* manage.c -- what a node asks of whoever holds the fabric.  See manage.h.
  *
  * Nothing here uses the C library: the bare-metal kernel links this file.

v4/src/message.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* message.c -- a message, as it is written to a port and read from one.
  * See message.h.  Nothing here uses the C library.
  */

v4/src/node.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* node.c -- the v4 node.  See node.h. */
 #include "v4/node.h"
 #include <stddef.h>

v4/src/stack.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* stack.c -- F18 circular hardware stacks.
  *
  * The two decompositions (T/S + 8-ring, R + 8-ring) are exactly equivalent to

v4/src/testcode.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* testcode.c -- run a word on a node, for tests.  See testcode.h. */
 #include "v4/testcode.h"
 

v4/src/text.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* text.c -- assemble definitions written as text.  See text.h. */
 #include "v4/text.h"
 #include <errno.h>

v4/src/umul.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* umul.c -- reference unsigned multiply.  See umul.h.
  *
  * Schoolbook multiplication on half-cells, in v4_ucell only.  No wider type is

v4/src/wire.c

@@ -1,3 +1,6 @@
+/* SPDX-License-Identifier: LicenseRef-Starship-1.0
+ * Copyright (c) 2023-2026 Robert A. James
+ */
 /* wire.c -- a queue of whole messages.  See wire.h.
  *
  * Nothing here uses the C library: the bare-metal kernel links this file.