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feat(v4): the mesh boot to spec -- Hera born empty in the kernel's fabric; births, kills, every node stepping together (#189)

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ENGINE step 4 Phase 1, Tasks 5b-5d, and the edge cases (Captain Bob, 2026-11-13: "Build it to proper
spec"; "Check for the edge cases"; "Yes, add it to v4-checks").

- v4/system/mesh.c, v4/include/v4/mesh.h: the nucleus assembled by the ROM and given to Hera as F18
  cells; Hera born empty at place 0, the kernel on port 0, the console on port 1; told she is 10, in the
  registry, the kernel's words, FORTH-79, sealed, POST, the kernel's capsules. NODE-BORN / NODE-KILL in
  the owner's room.
- No scheduler: v4_mesh_tell returns once the node told says how its text ended, and
  v4_mesh_step / v4_mesh_busy let the host step the fabric while it waits, so nodes run between
  lines as during them. A text left "waiting" is owed its end: the next line ends it "Interrupted"
  and is then run (MESH.md 7b.6).
- kernel: sk_v4.c boots through the mesh; its idle steps the fabric while a node can run, and halts
  only when none can (#151 kept). stadium_return_quota and stadium_ops_forget on a kill.
- Tests: v4/tests/test_mesh_boot.c (32 checks: the boot, births, kills, rebirth, a live number, a
  fault, no such node, Hera not killing herself, no room, a line too long, a node running for ever,
  a wait broken by the next line), run by `make -C v4 test` and under ASan+UBSan by `sanitize`
  (v4-checks); kernel/tests quota return; scripts/qemu_session.py births() and the edges on bare
  metal.
- Docs: ENGINE.md 6 "who runs next" struck (settled: no scheduler); the Phase 1 plan; FABRIC-3
  XLVIII.23; .claude/memory/rules.md: alpha.5 closed to new work.
- Evidence: v4-checks 80 programs under the sanitizers, 0 failures; the hosted builds alike; two
  stopped v4-checks runs labelled STOPPED; three development amd64 boots labelled.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017RzZgrf7V7Zk2iczBXDRbm
This commit is contained in:
Claude
2026-11-13 17:00:08 +00:00
parent d7d3e088db
commit 046ce0be65
34 changed files with 1166 additions and 181 deletions
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v4/tools/mkmap.c
+2 -2
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@@ -53,9 +53,9 @@ static int image_description(void)
printf("#include \"v4/image.h\"\n\nconst v4_image v4_map_image = {\n");
printf(" %uu, %uu, %uu, %uu,\n", (unsigned)V4_CELL_BITS, (unsigned)V4_NODE_WORDS, (unsigned)V4_DATA_RING, (unsigned)V4_RET_RING);
printf(" -1,\n -1, %ld,\n -1, -1,\n", (long)PORT);
printf(" %ld, %ld, %ld,\n %ld, %ld,\n %ld,\n %ld,\n %ld, %ld,\n %ld, %ld,\n %ld,\n",
printf(" %ld, %ld, %ld,\n %ld, %ld,\n %ld,\n %ld, %ld,\n %ld, %ld,\n %ld, %ld,\n %ld,\n",
(long)CONSOLE_TX, (long)CONSOLE_RX, (long)CONSOLE_ST, (long)DSTACK_REG, (long)RSTACK_REG,
(long)NODE_ERROR, (long)HEAT_REG, (long)DP, (long)LATEST, (long)BOOT_CELLS, (long)FENCE, (long)BUF0_W);
(long)NODE_ERROR, (long)HEAT_REG, (long)ME, (long)DP, (long)LATEST, (long)BOOT_CELLS, (long)FENCE, (long)BUF0_W);
printf(" %ld, %ld, %ld\n};\n", (long)ROM_IMG, (long)ROM_FAILED, (long)ROM_ERRLINE);
return 0;
}