FABRIC-3.9.0/3.9.8: messaging design (§7: dynamic kernel-Hermes M-0, manual words M-A, autonomous events M-B) and the fixed-size audit (§8), rulings recorded

Captain Bob: close the messaging gap first; the arena must be dynamic;
audit every fixed-size structure ("no arrays ... it should all be fairly
dynamic"); failures must be handled properly (never silent, never
partial, logged + counted + refused, parity marked INCOMPLETE). All
rulings as proposed; S-2 (Stadium cell pool) left open -- it was a
question, not a proposal.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

FABRIC-3.9.8.md

@@ -23,8 +23,11 @@ Evidence is named **before** each stage runs.
 | Stage | Change | Evidence (named in advance) |
 |---|---|---|
 | **O-A** | Observer role (`FABRIC-3.9.0.md` §2.1). The absolute-heat-share charge is discarded (ruling 5). Observers are left out of the decision's candidates, the work-heat charge and the floor, and (O-2) the absolute charge. Observers with events go ahead at clean boundaries, among themselves by wait stamp (§2.4, per O-1). | *(Corrected before starting.)* The standard sequence, with the G interleave unchanged. **Console responsive under load:** `1 2 + .` typed while `wa`/`wb` run prints `3` in the middle of the A/B stream. **Observer precedence:** a message to Hestia sent in the same line as the two worker jobs runs before any `A`/`B`. **Not run: the busy-wait DoE driver.** Under O-1, Hera running `DOE` is an observer acting on an event, and nothing displaces her, so `MU-WAIT-ALL` would wait forever. The originally named evidence ("Hera's share falls on the unchanged busy-wait driver") contradicts the design. `DOE` stays unrun until O-C replaces the driver. |
+| **M-0** *(first; a defect against the standing no-fixed-bounds rule)* | Kernel-Hermes arena, per-VM queues and channel member lists grow on demand; `Q_SLOT` decoupled from arena size (`FABRIC-3.9.0.md` §7.0). | The standard sequence. The existing kernel-Hermes boot self-tests (allocator, publish, drain, chunk, negotiation) still PASS, with `expected_n` now set by the reservoir, not the arena. A probe (reverted) admits **more than 32** messages system-wide, spread over senders with reservoir to pay, and more than 32 to one queue, with conservation and the ledger holding throughout. A channel takes more than 64 members. Nothing moves or corrupts across a grow: messages queued before a grow drain intact after it. |
+| **M-A** *(ahead of O-B, per Captain Bob: "close the gap first")* | Manual messaging words over the existing C API (`FABRIC-3.9.0.md` §7.2, names per M-1). | The standard sequence. At the console: `CHANNEL`, then `JOIN-VM` of `wa` and `wb`, then `PUBLISH` of a marker payload delivers to both (`n = 2`, both print). `LEAVE-VM` then `PUBLISH` delivers to one. `CHANNEL-CLOSE` succeeds, and refuses channel 0. `INJECT` lands in a queue that `MAIL?`/`.MAIL` show before the recipient runs. `.CHANNELS` lists what was made. The `dict_hash` set changes by the new words and is identical across ISAs. |
+| **M-B** | Autonomous events (§7.3): event channels created at boot; `EV-DONE`/`EV-BORN`/`EV-DIED` fired from the existing kernel points, for participants, funded per M-5, dropped and counted when full (M-6). | The standard sequence. A VM that `JOIN`s `EV-BORN`/`EV-DONE`/`EV-DIED` and defines the `ON-…` words sees one event for each `WORKER-BIRTH`, each job finished, and each `KILL`, with **no `SEND` anywhere in the job text**. A VM that didn't join sees nothing. The dropped-event counter reads 0 in normal use; a probe that floods the arena shows events dropped and counted, never blocking. |
 | **O-B** | Hera's own mail drained at `sk_vm_idle_point()`, with the readline `n > 0` gate; the timer-paced pump drain removed (§2.5). | The standard sequence, plus: a message sent to Hera while she sits idle at the prompt is acted on **without waiting for the idle beat**. A probe records the delay in beats from admission to drain; it must be well under `SK_IDLE_BEAT_INTERVAL`. The relay and BLK-ATTACH flows are unchanged. |
-| **O-C** | An event-driven DoE driver (§3): `DOE` starts trial 1 and returns to the prompt; `MU-DONE` counts, ends trials and starts the next; `MU-WAIT-ALL` is deleted. Capsule only. | A 1-rep smoke campaign on amd64 runs all 6 cells to `MU-CAMPAIGN: complete`, with every trial `fail=0` and N/N `KILL … dead`. Hera's rows during trials are only event handling. The prompt answers typed input while trials run. Then the standard sequence on all three ISAs. |
+| **O-C** | An event-driven DoE driver (§3, as revised by §7.4 once M-B lands): `DOE` starts trial 1 and returns to the prompt; Hera's `ON-DONE` (fed by `EV-DONE`) counts, ends trials and starts the next; `MU-WAIT-ALL` and the job text's own completion `SEND` are deleted. Capsule only. | A 1-rep smoke campaign on amd64 runs all 6 cells to `MU-CAMPAIGN: complete`, with every trial `fail=0` and N/N `KILL … dead`. Hera's rows during trials are only event handling. The prompt answers typed input while trials run. Then the standard sequence on all three ISAs. |
 | **O-D** | The DoE relaunch: `12345 3 S" <isa>" DOE`, amd64, then aarch64, then riscv64, with the ring extracted between ISAs and `artemis.img` **not** reset in between. | A fresh time estimate from O-C's measured row rate, **before** launch. Then per ISA: 18 `MU-TRIAL` markers, `fail=0`, `MU-CAMPAIGN: complete`. |
 | **Merge** | This branch to `master`, once all three ISAs have completed O-D. | Per this project's own merge practice, at Captain Bob's word. |