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

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
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@@ -471,7 +471,7 @@ these, a group at a time, with POST after each.
| ~~How the node tells a dictionary entry from a bare address at `call`~~ Ruled 2026-10-20: the kernel's table of entry addresses, filled by `(WORD-DEFINED)`, emptied by `(WORD-FORGOTTEN)`; a target not in it is a bare routine | Step 3 |
| ~~`EXECUTE`, which enters a word by a return~~ Ruled 2026-10-20: `EXECUTE` calls the xt | Step 3 |
| ~~`>R R> R@ I J LEAVE`, which cannot be called~~ Ruled 2026-10-20: they stay in line and are checked when the definition holding them is compiled; every other in-line word is called | Step 3 |
| Who decides which node runs next, and when: Hera, by compudynamics; preemptive and cooperative | Step 7 |
| ~~Who decides which node runs next, and when: Hera, by compudynamics; preemptive and cooperative~~ **Settled 2026-11-13 (#189; Captain Bob, "Build it to proper spec"): no one decides -- there is no scheduler (`JUSTIFICATION.md` 4). Every awake node executes an instruction word at each step of the fabric (`v4/include/v4/fabric.h`), and a node with nothing to do waits at a port. The kernel boots the fabric so (`v4/include/v4/mesh.h`).** | Step 7 |
| The node's safe moment for message delivery and switching | Step 7 |
| `PAD 42 OVER !`, a byte address given to `!` (D-1) | Step 6 |
| Which word patrons' accounts the hosted product keeps, having no Stadium | Step 3 |