docs(adr): ADR-019 — compiler distribution: Releases + thin Deno/JSR shim (#260 S1) (#283)

INT-04 (#181) "publish compiler + runtime": the runtime JS packages
ship to JSR (#261, publish authorised + dispatched 2026-05-19); the
compiler is a native OCaml binary, NOT a JSR/npm package. Its
distribution was an escalated one-way-door fork (#260,
AskUserQuestion). Owner chose option 4 = GitHub Releases binaries +
thin Deno/JSR shim.

Slice S1 — decision record only, no code (the discipline for a
one-way-door, mirroring ADR-015/016):
- ADR-019 in docs/specs/SETTLED-DECISIONS.adoc + the META.a2ml
  `[[adr]]` block (next free id; 016 was #234, 017/018 taken by
  concurrent merged ADRs). Releases-canonical dual-channel: release.yml
  emits per-platform binaries + SHA256SUMS (single source of truth;
  Guix/Nix/npm are additive fetch-derivations later, not separate
  producers); a thin `@hyperpolymath/affinescript` Deno/JSR shim
  downloads + checksum-verifies + caches + execs the pinned binary
  (HTTPS-only, no secrets, one version+checksum per shim release).
  Staged S1..S4.
- INT-10 (`affinescript-lsp` distribution) UNBLOCKED by this decision
  and filed as #282 (consumes the shim; gated on #260 S2/S3).
- TECH-DEBT INT-04 row + ECOSYSTEM INT-10 row truthed.

Gate: dune test --force green (docs/a2ml only; zero code, zero
regression).

Refs #260 #181 #282. Not Closes — staged campaign; owner closes per
ISSUE-CLOSURE.

Author: hyperpolymath

.machine_readable/6a2/META.a2ml

@@ -1192,3 +1192,71 @@ references = [
   "docs/RESCRIPT-ELIMINATION.adoc (#229 canonical map; Tier-3 ESC-01)",
   "META.a2ml [[adr]] ADR-012 (grammar changes are correctness assertions)",
 ]
+
+[[adr]]
+id = "ADR-019"
+status = "accepted"
+date = "2026-05-19"
+title = "Compiler distribution: GitHub Releases binaries + thin Deno/JSR shim (#260)"
+context = """
+INT-04 (#181) is "publish compiler + runtime". The runtime JS packages
+are JSR-publishable and that path is done (affinescript#261). The
+*compiler* is a native OCaml binary — it is NOT a JSR or npm package,
+so "publish the compiler" needed a distribution strategy. This gates
+INT-10 (`affinescript-lsp` distribution, which "waits on a published
+compiler"). The fork was escalated (issue #260; AskUserQuestion
+2026-05-19) over four options: (1) GitHub Releases binaries, (2)
+Guix/Nix channel, (3) thin JSR/npm shim, (4) Releases + shim. The
+owner chose (4).
+"""
+decision = """
+Dual-channel, Releases-canonical:
+
+- *Canonical artifact.* Extend the existing `release.yml` (`v*` tags)
+  to build per-platform compiler binaries (Linux x86_64 first;
+  macOS/Windows as the build matrix allows) and attach them to the
+  GitHub Release together with a `SHA256SUMS` manifest. Releases are
+  the single source of truth; Guix/Nix and any npm tail become
+  *additive fetch-derivations over the same artifact* later (NOT in
+  this ADR's slices) — no second producer of the binary.
+- *Ergonomic front door.* A thin Deno/JSR package
+  `@hyperpolymath/affinescript` (Deno-first per CLAUDE.md; no OCaml
+  source shipped) whose setup step downloads the host-platform binary
+  from the pinned Release, verifies it against the `SHA256SUMS`
+  checksum *embedded in that shim version*, caches it, and execs it.
+  HTTPS-only; no secrets in the shim; provenance = this repo's own
+  release workflow. Each shim version pins exactly one compiler
+  version+checksum (supply-chain: no floating fetch).
+- *Consumer.* INT-10 `affinescript-lsp` resolves the compiler via the
+  shim (`deno add` ergonomics) — this is what unblocks it.
+- npm tail: only if/when an npm-native consumer needs it, mirroring
+  the owner-sanctioned affine-vscode npm exception; deferred, not in
+  scope here.
+
+Staged (ledger #260 / INT-10; each a gated PR):
+- S1 (this): ADR-019 + plan; file INT-10. No code.
+- S2: `release.yml` per-platform binary + `SHA256SUMS` matrix.
+- S3: the `@hyperpolymath/affinescript` shim package (download +
+  checksum-verify + cache + exec) + its tests; publish is owner-gated
+  via the existing manual JSR workflow (like INT-04).
+- S4: wire INT-10 `affinescript-lsp` onto the shim.
+"""
+consequences = """
+- One-way: fixes the install contract (Releases artifact name/layout +
+  shim package name). Reversible per-slice; Releases-canonical keeps
+  Guix/Nix/npm strictly additive.
+- INT-10 (`affinescript-lsp` distribution) is unblocked once S2+S3
+  land; filed now.
+- Supply chain: every shim release pins one checksummed binary; no
+  floating download.
+- This decision is settled; do not reopen without amending this ADR.
+  Ledger #260 / INT-10 in docs/TECH-DEBT.adoc.
+"""
+references = [
+  "https://github.com/hyperpolymath/affinescript/issues/260",
+  "https://github.com/hyperpolymath/affinescript/issues/181",
+  ".github/workflows/release.yml",
+  ".github/workflows/publish-jsr.yml (INT-04; owner-gated publish)",
+  "docs/PACKAGING.adoc (INT-04; the JS-package half)",
+  "docs/specs/SETTLED-DECISIONS.adoc (ADR-019 section)",
+]

docs/ECOSYSTEM.adoc

@@ -227,8 +227,9 @@ corrected. INT-02 dep cleared. Runtime BLOCKED by #255 (wasm
 loop-codegen defect, pre-existing)
 |INT-09 |`affinescript-cadre` router/navigation runtime |ledger-only
 |planned (blocked by INT-07)
-|INT-10 |LSP distribution (`affinescript-lsp`) |ledger-only |planned
-(blocked by INT-04)
+|INT-10 |LSP distribution (`affinescript-lsp`) |#282 |unblocked —
+distribution decided (ADR-019: Releases + thin Deno/JSR shim, #260).
+Consumes the shim once #260 S2/S3 land
 |INT-11 |Browser host parity (DOM loader + reconciler end-to-end) |
 ledger-only |planned (blocked by INT-02/08)
 |INT-12 |typed-wasm convergence: AffineScript-emitted fixtures into the

docs/TECH-DEBT.adoc

@@ -189,7 +189,9 @@ compiler-emitted xmod wasm (closes INT-01↔INT-02). Unblocks INT-05/08/11
 Component-Model re-target, staged S1..S6); S3+ hard-gated on S2
 toolchain (`wasm-tools`/`wasm-component-ld`)
 |INT-04 |Publish to JSR/npm |S2 |#181 packaging READY (dry-run green,
-manual workflow); owner-gated publish; compiler-binary = #260
+manual workflow); JSR publish authorised + dispatched (owner go
+2026-05-19); compiler-binary distribution decided = **ADR-019**
+(#260, Releases + thin Deno/JSR shim, staged S1..S4) — unblocks INT-10
 |INT-07 |`affinescript-tea` runtime |S2 |#182 runtime + run loop shipped
 (TeaApp/parseTeaLayout, Linear-msg enforced); INT-01 cleared (#253)
 |INT-08 |DOM reconciler |S2 |#183 implemented + compiles; `.as`→`.affine`

docs/specs/SETTLED-DECISIONS.adoc

@@ -409,3 +409,36 @@ parts of `burble`) port under this doctrine; per-file execution is the
 This decision is settled; do not reopen without amending the ADR. Full
 ADR in `.machine_readable/6a2/META.a2ml` (ADR-018); #229 canonical map in
 `docs/RESCRIPT-ELIMINATION.adoc`; escalation issue #245.
+
+== Compiler Distribution: GitHub Releases Binaries + Thin Deno/JSR Shim (ADR-019)
+
+INT-04 (#181) is "publish compiler + runtime". The runtime JS packages
+are JSR-publishable and shipped (#261); the *compiler* is a native
+OCaml binary — not a JSR/npm package — so its distribution was an
+escalated one-way-door fork (issue #260, AskUserQuestion 2026-05-19)
+over Releases-binaries / Guix-Nix / JSR-shim / combination. The owner
+chose the *combination*.
+
+Decision: *Releases-canonical, dual-channel*. The existing
+`release.yml` (`v*` tags) is extended to build per-platform compiler
+binaries + a `SHA256SUMS` manifest attached to the GitHub Release (the
+single source of truth — Guix/Nix and any npm tail are additive
+fetch-derivations over it later, not separate producers). A thin
+Deno/JSR package `@hyperpolymath/affinescript` is the ergonomic front
+door: it downloads the host-platform binary from the pinned Release,
+verifies it against the `SHA256SUMS` checksum embedded in that shim
+version, caches and execs it (HTTPS-only, no secrets, one
+version+checksum pinned per shim release — no floating fetch).
+`affinescript-lsp` (INT-10) consumes the shim, which is what unblocks
+INT-10. An npm tail is deferred (only if an npm-native consumer needs
+it, mirroring the affine-vscode exception).
+
+Staged (ledger #260 / INT-10): *S1* this ADR + plan + file INT-10 (no
+code); *S2* `release.yml` per-platform binary + `SHA256SUMS` matrix;
+*S3* the shim package (download + checksum-verify + cache + exec) +
+tests, publish owner-gated via the existing manual JSR workflow; *S4*
+wire INT-10 `affinescript-lsp` onto the shim.
+
+This decision is settled; do not reopen without amending the ADR. Full
+ADR in `.machine_readable/6a2/META.a2ml` (ADR-019); ledger #260 /
+INT-10 in `docs/TECH-DEBT.adoc`.