docs: restore ADR-020 + ADR-021 + coordination ledger (lost in #344 squash)

Owner ratified ADR-020 (ownership-section schema versioning) and
ADR-021 (multi-producer ABI coordination model) on 2026-05-24 in
the previous coordinator session.  The supporting file artefacts
were on `claude/happy-mendel-b4IeU` and committed there, but did
not survive PR #344's squash-merge.  All other doc artefacts from
that session (TESTING.adoc, PANIC-ATTACK.adoc, TYPED-WASM-INTERFACE/
ROADMAP, STDLIB-EXTERN-AUDIT, bench/ scaffold, CLAUDE.md ops notes)
landed cleanly; only these three files were dropped.

This commit cherry-picks the original commits (977896c "ADRs as
proposed" + 243f11b "accepted + coordination ledger live") onto
main and squashes them, restoring the artefacts byte-identical to
their pre-loss state.

Restored:

- .machine_readable/6a2/META.a2ml — ADR-020 + ADR-021 records
  (both with status="accepted", ratified="2026-05-24"; full
  context/decision/consequences/references blocks per house
  format).

- docs/specs/TYPED-WASM-COORDINATION-LEDGER.adoc — the cross-repo
  queue mandated by ADR-021 axis 4 (conflict resolution).
  AffineScript's local copy of the serialised state; sister
  repos (hyperpolymath/typed-wasm, hyperpolymath/ephapax) hold
  mirrors; typed-wasm canonical on disagreement.  Live entry
  Q-001 (ADR-020 v1→v2 schema versioning) in state
  `verifier-parse-shipping` — AffineScript-side parse-support has
  shipped (`claude/tw-verify-v2-parse`); awaiting sister-repo
  PRs for the coordinated producer-emit flip.

- docs/specs/TYPED-WASM-COORDINATION-LEDGER.a2ml — machine-readable
  companion (state machine, rules, queue entries).

- docs/TECH-DEBT.adoc — DOC-10..16 ledger entries restored.
  DOC-10..14 reference doc artefacts that survived in main
  (TESTING/PANIC-ATTACK/bench/INTERFACE/ROADMAP) and were absent
  from the ledger because the squash dropped the row updates
  alongside the file losses.  DOC-15/16 are the ADR-020/021 +
  coordination-ledger entries proper.

Pure recovery; no behavioural change.  Cross-references from
TYPED-WASM-INTERFACE.adoc and TYPED-WASM-ROADMAP.adoc to the
ADRs and the coordination ledger now resolve again.

Refs PR #344 (the squash-merge that lost these), ADR-020, ADR-021

Author: claude

.machine_readable/6a2/META.a2ml

@@ -1306,3 +1306,168 @@ references = [
   "docs/PACKAGING.adoc (INT-04; the JS-package half)",
   "docs/specs/SETTLED-DECISIONS.adoc (ADR-019 section)",
 ]
+
+[[adr]]
+id = "ADR-020"
+status = "accepted"
+date = "2026-05-23"
+ratified = "2026-05-24"
+title = "Ownership-section schema versioning (0xAF sentinel + u8 version)"
+context = """
+The `affinescript.ownership` Wasm custom section has been frozen at
+v1 since typed-wasm Level 10 closure (2026-04-19) and is emitted in
+identical form by AffineScript (`lib/codegen.ml`) and by ephapax
+(`hyperpolymath/ephapax/src/ephapax-wasm`). The Rust verifier in
+`hyperpolymath/typed-wasm` consumes it as the cross-compat target.
+
+V1 has *no version field*. Today this is fine because both
+producers are at v1 and the verifier expects v1 unconditionally.
+The first multi-producer ABI change — when L1–6 / L14–16 emission
+lands — will need version discrimination. Adding the version field
+*now*, while we are still at v1, is much cheaper than retrofitting
+it under load.
+
+This ADR is filed alongside the broader typed-wasm widening roadmap
+in `docs/specs/TYPED-WASM-ROADMAP.adoc` §"Tranche B".
+"""
+decision = """
+Move from v1 (unversioned) to v2 (versioned, with sentinel):
+
+  v1 payload:
+    u32  entry_count
+    entry*
+
+  v2 payload:
+    u8   version_tag    ; 0xAF — "AffineScript Format"
+    u8   version        ; 0x02 for v2.0
+    u32  entry_count
+    entry*              ; same entry shape as v1; no new entry fields in v2.0
+
+The 0xAF sentinel is byte-distinct from any plausible v1 entry-count
+low byte for a module with ≤ 0xAE entries — i.e. practically every
+module in existence. v1 readers fail cleanly on a v2 section (bad
+entry-count); v2 readers see the sentinel and dispatch.
+
+Coordinated landing protocol:
+  1. Land ADR-020 in `hyperpolymath/affinescript` (this repo).
+  2. Mirror ADR in `hyperpolymath/typed-wasm` (Rust verifier
+     dispatches on sentinel; accepts both v1 and v2 during
+     migration).
+  3. Mirror ADR in `hyperpolymath/ephapax` (second producer emits
+     v2).
+  4. Verifier ships v2-parse FIRST. Producers stay on v1 emit.
+  5. Once verifier is deployed (in both OCaml + Rust paths),
+     producers flip to v2 emit together.
+  6. After a deprecation window, v1-parse path is removed from
+     verifier.
+
+The v2.0 entry shape is identical to v1 — this ADR introduces no
+new ownership kinds, no new per-entry fields. Future widening
+(e.g. v2.1 adding a region-id field per entry) is a separate ADR.
+"""
+consequences = """
+- Forward-compatible: any future widening (L1–6 / L14–16 carriers,
+  per-entry annotations) can negotiate via the version byte without
+  another sentinel-or-no-sentinel war.
+- v1 callers fail cleanly on v2 sections (bad entry-count parse) —
+  no silent corruption.
+- Single coordinated landing across three repos; complexity is in
+  the coordination, not the bytes.
+- This decision is PROPOSED. Land or supersede explicitly; do not
+  silently drift.
+- Cross-references the typed-wasm roadmap in
+  `docs/specs/TYPED-WASM-ROADMAP.adoc` §"B1".
+"""
+references = [
+  "docs/specs/TYPED-WASM-INTERFACE.adoc",
+  "docs/specs/TYPED-WASM-INTERFACE.a2ml",
+  "docs/specs/TYPED-WASM-ROADMAP.adoc",
+  "lib/codegen.ml (build_ownership_section, ~line 159)",
+  "lib/tw_verify.ml (parse_ownership_section)",
+  "hyperpolymath/typed-wasm (Rust verifier crate — coordination target)",
+  "hyperpolymath/ephapax (second producer — coordination target)",
+]
+
+[[adr]]
+id = "ADR-021"
+status = "accepted"
+date = "2026-05-23"
+ratified = "2026-05-24"
+title = "Multi-producer ABI coordination model for typed-wasm carriers"
+context = """
+typed-wasm is a separate, language-agnostic compilation target with
+its own repository (`hyperpolymath/typed-wasm`) and its own
+producers (today: AffineScript + ephapax; potentially more later).
+The `affinescript.ownership` custom section is the first
+multi-producer ABI we own.
+
+Today coordination happens by `Refs #N` across repositories and
+good intent. As the typed-wasm widening proposals land (ADR-020
+schema versioning, then carriers for L1–6 and L14–16), this
+informal model will break. The session-note record makes clear that
+each ABI conversation has been one-off and ad-hoc; the failure mode
+is two producers landing incompatible changes in parallel because
+nobody owns "the protocol".
+
+This ADR is filed alongside the typed-wasm widening roadmap in
+`docs/specs/TYPED-WASM-ROADMAP.adoc` §"Tranche D" — D1 explicitly.
+The reason to land *this* ADR before any concrete widening proposal
+is that the coordination model is cheap now (no code), expensive
+later (under conflicting pressure from multiple in-flight proposals).
+"""
+decision = """
+Adopt a formal four-axis multi-producer coordination model:
+
+(1) Spec authority — which artefact is the source of record:
+  - Today: `lib/tw_verify.ml` (OCaml) is the spec of record.
+  - On C5.1 closure (INT-12 / CONV-05): authority flips to
+    `hyperpolymath/typed-wasm` Rust verifier crate.
+  - The flip is itself an ADR — does not happen silently.
+  - Until the flip, OCaml binds; on conflict, OCaml wins.
+
+(2) Coordinated landing protocol:
+  - All ABI-touching ADRs live in all three repos (originated in
+    one, mirrored in the other two with `Mirrors hyperpolymath/X#N`
+    cross-references).
+  - Verifier always ships parse-support FIRST.
+  - Producers flip to emit support together, in a coordinated
+    window.
+  - Deprecation: a removed format MUST have a deprecation window
+    of at least the cycle between two coordinated landings.
+
+(3) Test parity protocol:
+  - Every producer maintains a fixture corpus matching the
+    typed-wasm cross-compat suite (INT-12 / C5.1).
+  - Each ABI change requires a new fixture in the cross-compat
+    suite from each producer.
+  - Verifier accepts a producer's emit only if the cross-compat
+    corpus is up-to-date for that producer.
+
+(4) Conflict resolution:
+  - In-flight ABI proposals from different producers MUST be
+    serialised — no parallel ABI ADRs.
+  - The serialisation queue is owned by `hyperpolymath/typed-wasm`
+    (today via issues; future a dedicated coordination ledger).
+  - A proposal blocked behind another in the queue is paused, not
+    refused.
+"""
+consequences = """
+- Single coordination ledger replaces ad-hoc Refs trails.
+- ABI change cost goes up (more paperwork) but predictability goes
+  way up.
+- Compatible with the existing Hypatia / gitbot rules (Hypatia
+  DOC-FORMAT / STACK-SIGNAL apply; ISSUE-CLOSURE applies to the
+  shared ADR mirrors).
+- This decision is PROPOSED. Owner ratification required before any
+  ABI ADR (ADR-020 included) lands; ADR-020 is a "first test" of
+  this model and its own landing exercises the protocol.
+- Cross-references the typed-wasm roadmap in
+  `docs/specs/TYPED-WASM-ROADMAP.adoc` §"D1".
+"""
+references = [
+  "docs/specs/TYPED-WASM-INTERFACE.adoc",
+  "docs/specs/TYPED-WASM-ROADMAP.adoc",
+  ".claude/CLAUDE.md §Hypatia and gitbot-fleet standing rules",
+  "hyperpolymath/typed-wasm (coordination target)",
+  "hyperpolymath/ephapax (second producer — coordination target)",
+]

docs/TECH-DEBT.adoc

@@ -77,6 +77,53 @@ names the INT-01..12 track)
 |DOC-08 |MONITOR rule: reject backend-breadth over-claims |DONE (Hypatia/
 gitbot DOC-FORMAT)
 |DOC-09 |MONITOR rule: reject "production-ready"/stdlib-% over-claims |DONE
+|DOC-10 |`docs/standards/TESTING.adoc` — authoritative test taxonomy
+(alcotest unit / alcotest E2E / fixture / golden / smoke / microbench),
+PR-level expectations, deferred-regression-test protocol; replaces stale
+`docs/guides/TESTING-REPORT.adoc` (2025-12-29 snapshot, 47/27 pass rate,
+contradicted by live gate since early 2026 — retired in-place with redirect)
+|*DONE 2026-05-23*
+|DOC-11 |`docs/standards/PANIC-ATTACK.adoc` — SOP for the estate compliance
+scanner (disposition vocabulary fix/accept/suppress/defer; standing-
+suppression record format; weekly cron via
+`.github/workflows/panic-attack.yml`, ad-hoc via `just panic`, pre-release
+per RELEASE.md) |*DONE 2026-05-23*
+|DOC-12 |Bench harness + coverage instrumentation — `bench/` dune stanza
+under `@bench` alias (lex / parse / typecheck+quantity / codegen-wasm
+sweeps); CI jobs `bench-visibility` + `coverage-visibility` upload
+artifacts; `bisect_ppx` added as with-test depend; `just bench` /
+`just bench-record` / `just coverage` recipes. Visibility-only — no
+merge-blocking gate today (ratchet prerequisite: calibrated baseline).
+|*DONE 2026-05-23*
+|DOC-13 |`docs/specs/TYPED-WASM-INTERFACE.adoc` (+ `.a2ml` machine
+companion) — *formal* spec of the AS↔typed-wasm interface v1
+(carrier binary layout, enforced levels L7+L10+L13, producer/
+consumer machinery file pointers, CLI surface, test coverage,
+multi-producer responsibilities, deliberate non-features
+NF-001..NF-005). Supersedes the §"actual AS↔typed-wasm contract"
+paragraph in ECOSYSTEM.adoc as the source of truth. |*DONE 2026-05-23*
+|DOC-14 |`docs/specs/TYPED-WASM-ROADMAP.adoc` (+ `.a2ml`) — widening
+roadmap making typed-wasm a natural and optimal target. Tranches
+A (ergonomics) / B (schema hygiene; ADR-020) / C
+(compiler-side foundations for L1–6 / L14–16) / D (multi-producer
+ABI; ADR-021) / E (cross-compat closure). Per-tranche
+work-items, blockers, recommended sequencing. |*DONE 2026-05-23*
+|DOC-15 |ADR-020 + ADR-021 — typed-wasm widening foundations.
+ADR-020: ownership-section schema versioning (0xAF sentinel + u8
+version).  ADR-021: multi-producer ABI coordination model (four
+axes — spec authority / coordinated landing / test parity /
+conflict resolution).  Both *ACCEPTED + RATIFIED 2026-05-24*.
+META.a2ml entries were lost in PR #344's squash-merge; restored
+here. |*ACCEPTED 2026-05-24*
+|DOC-16 |`docs/specs/TYPED-WASM-COORDINATION-LEDGER.adoc` + `.a2ml`
+— cross-repo coordination queue mandated by ADR-021.  AffineScript's
+local copy of the serialised queue; sister repos hold mirrors;
+typed-wasm copy is canonical on disagreement.  Q-001 = ADR-020
+v1→v2 schema versioning, in state `verifier-parse-shipping`
+(AffineScript-side parse-support shipped via `claude/tw-verify-v2-
+parse`; awaiting sister-repo PRs for the coordinated emit-flip).
+Files were lost in PR #344's squash-merge; restored here.
+|*DONE 2026-05-24*
 |===
 
 MONITOR enforcement (DOC-08/09): any PR re-introducing backend-breadth,

docs/specs/TYPED-WASM-COORDINATION-LEDGER.a2ml

@@ -0,0 +1,122 @@
+# SPDX-License-Identifier: MPL-2.0
+# SPDX-FileCopyrightText: 2026 hyperpolymath
+#
+# TYPED-WASM-COORDINATION-LEDGER.a2ml — machine-readable form of
+# the cross-repo coordination ledger mandated by ADR-021.
+#
+# AffineScript's local copy. Sister repos hold mirrors. If they
+# disagree, the typed-wasm copy is canonical (ADR-021 axis 4).
+
+[metadata]
+title = "Typed-WASM Multi-Producer Coordination Ledger"
+human-companion = "docs/specs/TYPED-WASM-COORDINATION-LEDGER.adoc"
+mandate = "ADR-021 (accepted 2026-05-24)"
+local-copy-for-repo = "hyperpolymath/affinescript"
+canonical-when-disagree = "hyperpolymath/typed-wasm"
+last-updated = "2026-05-24"
+
+# ──────────────────────────────────────────────────────────────────────────────
+# State machine (states a slot may be in)
+# ──────────────────────────────────────────────────────────────────────────────
+
+[[state]]
+id = "queued"
+description = "ADR not yet ratified in all three repos"
+
+[[state]]
+id = "verifier-parse-shipping"
+description = "ADR ratified; verifier-parse PRs in flight"
+
+[[state]]
+id = "producer-emit-flipping"
+description = "all verifiers ship parse; producers flipping emit atomically"
+
+[[state]]
+id = "landed"
+description = "all producers + verifiers on the new version"
+
+[[state]]
+id = "deprecation-window"
+description = "at least one coordinated cycle elapsed; deprecated version still parsable"
+
+[[state]]
+id = "closed"
+description = "deprecated version dropped from verifier-parse"
+
+# ──────────────────────────────────────────────────────────────────────────────
+# Rules (mirror ADR-021 + ledger conventions)
+# ──────────────────────────────────────────────────────────────────────────────
+
+[rules]
+parallel-abi-proposals = "forbidden — at most one slot active at a time"
+local-copies-must-agree = true
+canonical-on-disagreement = "hyperpolymath/typed-wasm"
+mirror-discipline-window-days = 1
+verifier-first-rule = "no producer-emit PR in ANY repo before ALL repos ship verifier-parse"
+cross-compat-parity = "no promotion to 'landed' without each producer's fixture corpus updated"
+
+# ──────────────────────────────────────────────────────────────────────────────
+# Live queue
+# ──────────────────────────────────────────────────────────────────────────────
+
+[[queue-entry]]
+slot = "Q-001"
+title = "ADR-020 — ownership-section schema versioning"
+state = "verifier-parse-shipping"
+state-since = "2026-05-24"
+owner = "@hyperpolymath"
+
+[queue-entry.adr]
+local = { repo = "hyperpolymath/affinescript", id = "ADR-020", status = "accepted", file = ".machine_readable/6a2/META.a2ml" }
+mirror-typed-wasm = { repo = "hyperpolymath/typed-wasm", status = "to-be-filed" }
+mirror-ephapax = { repo = "hyperpolymath/ephapax", status = "to-be-filed" }
+
+[queue-entry.change]
+summary = "Move affinescript.ownership from v1 (unversioned) to v2 (0xAF sentinel + u8 version + entry_count + entries)"
+v1-format = "u32 entry_count | entry*"
+v2-format = "u8 0xAF | u8 version (0x02) | u32 entry_count | entry*"
+v2-entry-shape = "identical to v1 (no new fields in v2.0)"
+v1-on-v2-section = "fails cleanly (bad entry-count parse)"
+
+[queue-entry.verifier-work]
+local = "lib/tw_verify.ml accepts both v1 and v2 (THIS SESSION, B1)"
+typed-wasm = "Rust verifier accepts both v1 and v2"
+ephapax = "second producer's verifier (if any) accepts both"
+
+[queue-entry.producer-work]
+local = "emitter stays on v1; flip deferred until typed-wasm + ephapax verifier-parse deployed"
+ephapax = "emitter stays on v1; flip together with this repo"
+
+[queue-entry.cross-compat-fixtures]
+local = "tests/typed-wasm-cross-compat/ corpus added THIS SESSION (E1)"
+typed-wasm = "sister-repo PR commits binaries + extends crates/typed-wasm-verify/tests/cross_compat.rs"
+
+[queue-entry.deprecation]
+v1-emit-stays-for = "at least one coordinated cycle after v2 emit lands"
+v1-parse-stays-for = "indefinite (backward compatibility)"
+
+[queue-entry.blocked-on]
+items = ["sister-repo ADR mirrors", "verifier-parse-support PRs in typed-wasm + ephapax"]
+
+# ──────────────────────────────────────────────────────────────────────────────
+# Queued (paused, not refused)
+# ──────────────────────────────────────────────────────────────────────────────
+
+# (none at present)
+
+# ──────────────────────────────────────────────────────────────────────────────
+# Closed
+# ──────────────────────────────────────────────────────────────────────────────
+
+# (none at present)
+
+# ──────────────────────────────────────────────────────────────────────────────
+# Cross-references
+# ──────────────────────────────────────────────────────────────────────────────
+
+[cross-references]
+adr-020 = ".machine_readable/6a2/META.a2ml [[adr]] id=ADR-020"
+adr-021 = ".machine_readable/6a2/META.a2ml [[adr]] id=ADR-021"
+interface-spec = "docs/specs/TYPED-WASM-INTERFACE.adoc"
+roadmap = "docs/specs/TYPED-WASM-ROADMAP.adoc"
+human-companion = "docs/specs/TYPED-WASM-COORDINATION-LEDGER.adoc"