feat(okf): enforce §3 okf_version shape, bump convention 0.1 -> 0.2

The 2026-07-23 reservation said enforcement waits until "the emitters have
migrated". Measured rather than assumed, and the emitter set turned out to be
TWO, not three:

  okr @0059da7       okf_version: 0.1 + okf_layout: kb-layout-2026-06. Migrated.
  linkedin-studio    scaffold.ts:38 -> okf_version: 0.1. Never carried a layout
                     string; has no okf_layout and needs none.
  ms-ai-architect    NOT an emitter. Zero index.md in the repo; okf_version
                     appears in one planning doc. The status table already said
                     "designed, not built" -- only the word "emitters" implied it.

Swept the whole marketplace plus the sibling consumer repos: every live
okf_version value is 0.1. The flip is a no-op today and locks the invariant.

The gate checks SHAPE (/^\d+(\.\d+)*$/), never membership: the upstream value
set is Google's (spec §12), so a bundle targeting a newer version passes. A
membership check would be the convention claiming a set it says it does not own
-- the over-reach class this round has corrected three times. Presence stays
unenforced (reported, not failed) as a separate §3 MUST.

Convention bumped 0.1 -> 0.2 by this log's own criterion: the set of conforming
bundles changed (the spec explicitly said a layout string "conforms today", and
rollout rule 6 defines conformance as gate output). The §12 per-plugin re-check
is pre-measured as finding zero violations.

Also closes a parity blind spot found while landing this: check-okf-parity
compared the okf_version VALUE, which is identical exactly when two impls
disagree about whether it is acceptable -- a false "agree" on the axis the gate
exists to watch. The signature now carries a boolean shape verdict, with
red-marker-layout as the committed red proof. Its "diverge" expectation encodes
okr's lag (they still pure-echo) and flips to "agree" when they mirror it.

And a correction the round earned: portfolio-optimiser enumerated their own
bundle surface and it is four, not three. The dormant fourth
(reference_domain.py:49 -> package data at :70) has no flag form at all, so our
published claim that the re-measurement surfaced "one" unreported entry was
itself one-of-two. Sharpens the standing rule: a search shaped like one entry
type cannot see another; install-vs-fixture is one instance, not the class.

Suite 73 -> 78. coord: PO replied, okr + llm-ingestion-okf notified (the latter
under the standing promise to flag any okf-check.mjs change).

scripts/check-okf-parity.mjs

@@ -16,7 +16,8 @@
 //
 // CONTRACT: comparison unit is the PER-FILE outcome, not the bundle verdict — two
 // checkers can both say "OK" while disagreeing on what IS a concept file. Each impl's
-// existing checkBundle(root) return is normalized to { conceptCount, untyped[], okfVersion };
+// existing checkBundle(root) return is normalized to
+// { conceptCount, untyped[], okfVersion, okfVersionAccepted };
 // the gate diverges iff those normalized outcomes are not identical across the
 // available impls. Defined over DEFAULT read-mode (strictIngest OFF, not files-scoped).
 //
@@ -59,12 +60,19 @@ export async function normalizedOutcome(impl, root) {
     conceptCount: r.scanned,
     untyped: [...(r.missingType ?? [])].sort(),
     okfVersion: r.okfVersion ?? null,
+    // spec §3 marker axis. Normalized to a BOOLEAN verdict, not the message: two impls that
+    // both enforce must agree even if they word the rejection differently. An impl that does
+    // not check at all reports no error, i.e. "accepts" — which is exactly the signal we want
+    // when one enforces and another still pure-echoes.
+    okfVersionAccepted: !(r.okfVersionError ?? null),
   };
 }
 
 // Signature over the fields that define per-file parity. Distinct signatures => divergence.
+// The okf_version VALUE alone could not carry the marker axis: when impls disagree about
+// whether a value is acceptable, the value itself is identical, so the axis read as "agree".
 function signature(o) {
-  return `${o.conceptCount}|${o.untyped.join(',')}|${o.okfVersion}`;
+  return `${o.conceptCount}|${o.untyped.join(',')}|${o.okfVersion}|${o.okfVersionAccepted}`;
 }
 
 // Run all impls on one bundle root; decide agree vs diverge among the comparable ones.
@@ -145,7 +153,10 @@ if (isMain) {
       r.status === 'PASS' && r.expected === 'diverge' ? 'PASS (red-proof)' : r.status;
     out.push(`${r.fixture.padEnd(22)} [${(r.axis || '').padEnd(16)}] expect=${(r.expected || '').padEnd(8)} ${tag}`);
     for (const o of r.outcomes ?? []) {
-      out.push(`    ${o.name.padEnd(10)} count=${o.conceptCount}  untyped=[${o.untyped.join(', ')}]  okf=${o.okfVersion}`);
+      // The shape verdict is printed because the value alone cannot show this axis: on a
+      // marker divergence both impls print the SAME okf= value and only the verdict differs.
+      const verdict = o.okfVersionAccepted ? 'accepted' : 'REJECTED';
+      out.push(`    ${o.name.padEnd(10)} count=${o.conceptCount}  untyped=[${o.untyped.join(', ')}]  okf=${o.okfVersion} (${verdict})`);
     }
     if (r.skipped?.length) out.push(`    (skipped, unavailable: ${r.skipped.join(', ')})`);
   }

scripts/check-okf-parity.test.mjs

@@ -93,6 +93,31 @@ test('red-proof: BOM+CRLF typed concept diverges; the same file as UTF-8/LF agre
   }
 });
 
+// --- marker axis: §3 okf_version shape enforcement (catalog enforces, okr echoes) ---
+// This axis was invisible to the gate until the signature carried the shape verdict: the
+// signature compared the okf_version VALUE, which is identical across impls precisely when
+// they disagree about whether it is acceptable. A false "agree" on the one axis the gate
+// exists to watch.
+test('marker axis: a layout string in okf_version diverges; a version-shaped one agrees', async () => {
+  const impls = [CATALOG, OKR];
+  const layout = tmpRoot();
+  const versioned = tmpRoot();
+  try {
+    writeFileSync(join(layout, 'index.md'), 'okf_version: kb-layout-2026-06\n\n# Bundle\n');
+    writeFileSync(join(layout, 'c.md'), TYPED);
+    const evLayout = await evaluateBundle(layout, impls);
+    assert.equal(evLayout.diverges, true, 'catalog enforces the shape, okr still pure-echoes -> diverge');
+
+    writeFileSync(join(versioned, 'index.md'), ROOTINDEX);
+    writeFileSync(join(versioned, 'c.md'), TYPED);
+    const evVersioned = await evaluateBundle(versioned, impls);
+    assert.equal(evVersioned.diverges, false, 'a version-shaped value is accepted by both -> agree');
+  } finally {
+    rmSync(layout, { recursive: true, force: true });
+    rmSync(versioned, { recursive: true, force: true });
+  }
+});
+
 // --- Layer 2b: symlink axis (runtime-materialized; must not hang/crash) ---
 test('symlink axis: symlinked file + dir + loop are skipped by both, no hang, agree', async () => {
   const dir = tmpRoot();

scripts/okf-check.mjs

@@ -8,7 +8,10 @@
 //     >= 1 file without type -> exit 1, count + names the files; 0 -> exit 0.
 //   - recommended fields (resource/title/description/timestamp) -> WARNING, not error.
 //   - the bundle-root index.md's `okf_version` is echoed for human comparison
-//     (no auto-fetch — offline by design).
+//     (no auto-fetch — offline by design), and its VALUE must be version-shaped:
+//     a plugin's own layout revision belongs in `okf_layout` (§12). Shape only —
+//     the upstream value set is Google's, not this convention's. Absence is still
+//     echoed, not failed.
 //
 // Provenance: lifted from okr/scripts/okf-check.mjs (the de-facto reference
 // implementation; spec §7) at c06e4d7 (2026-06-29), with English output + a vendored
@@ -48,6 +51,18 @@ function rootOkfVersion(root) {
   return m ? m[1].trim() : null;
 }
 
+// spec §3: the value is the upstream OKF version ALONE; a plugin's own layout revision
+// belongs in `okf_layout` (§12). This checks only that the value is version-SHAPED — it is
+// deliberately NOT a claim about which upstream versions exist, because that value set is
+// owned by Google (§12), not by this convention. Absence is a separate §3 MUST and stays
+// unenforced here (echoed as MISSING). null when there is nothing to complain about.
+const UPSTREAM_VERSION_SHAPE = /^\d+(\.\d+)*$/;
+function okfVersionShapeError(value) {
+  if (value === null || UPSTREAM_VERSION_SHAPE.test(value)) return null;
+  return `root index.md: okf_version "${value}" is not upstream-version-shaped; `
+    + "a plugin's own layout revision belongs in okf_layout (spec §12)";
+}
+
 export function checkBundle(root) {
   const concepts = walkConcepts(root);
   const missingType = [];
@@ -63,11 +78,13 @@ export function checkBundle(root) {
       if (!get(field)) warnings.push(`${rel}: missing recommended field "${field}"`);
     }
   }
+  const okfVersion = rootOkfVersion(root);
   return {
     scanned: concepts.length,
     missingType,
     warnings,
-    okfVersion: rootOkfVersion(root),
+    okfVersion,
+    okfVersionError: okfVersionShapeError(okfVersion),
   };
 }
 
@@ -91,9 +108,13 @@ if (isMain) {
   out.push(`  ${r.missingType.length} files without type:`);
   for (const f of r.missingType) out.push(`    - ${f}`);
   out.push(`  okf_version: ${r.okfVersion || 'MISSING (root index without okf_version)'}`);
+  if (r.okfVersionError) out.push(`    - ${r.okfVersionError}`);
   out.push(`  Warnings (recommended fields): ${r.warnings.length}`);
   for (const w of r.warnings) out.push(`    ! ${w}`);
-  out.push(r.missingType.length === 0 ? 'OK: valid OKF bundle' : `FAIL: ${r.missingType.length} file(s) missing type:`);
+  const failures = [];
+  if (r.missingType.length > 0) failures.push(`${r.missingType.length} file(s) missing type:`);
+  if (r.okfVersionError) failures.push('okf_version is not upstream-version-shaped');
+  out.push(failures.length === 0 ? 'OK: valid OKF bundle' : `FAIL: ${failures.join('; ')}`);
   process.stdout.write(`${out.join('\n')}\n`);
-  process.exit(r.missingType.length === 0 ? 0 : 1);
+  process.exit(failures.length === 0 ? 0 : 1);
 }

scripts/okf-check.test.mjs

@@ -102,3 +102,66 @@ test('checkBundle(): recommended-field gaps are warnings, not failures', () => {
     rmSync(dir, { recursive: true, force: true });
   }
 });
+
+// --- spec §3 okf_version shape enforcement (the reservation lifted 2026-07-25) ---
+// The catalog owns the SEPARATION of the two markers (§12), not the upstream value set
+// (owned by Google). So the gate checks that the value is version-SHAPED — never that it
+// is a version that exists upstream.
+
+test('okf_version carrying a layout string -> exit != 0 and points at okf_layout', () => {
+  const dir = tmpRoot();
+  try {
+    writeValidBundle(dir);
+    writeFileSync(join(dir, 'index.md'), 'okf_version: kb-layout-2026-06\n\n# Bundle\n');
+    const { status, stdout } = runCheck(dir);
+    assert.notEqual(status, 0, 'a layout snapshot in okf_version must fail the gate');
+    assert.match(stdout, /okf_layout/, 'the failure must name the marker it belongs in');
+  } finally {
+    rmSync(dir, { recursive: true, force: true });
+  }
+});
+
+test('a version-shaped okf_version passes, including multi-component', () => {
+  for (const value of ['0.1', '1.0', '0.1.2', '12']) {
+    const dir = tmpRoot();
+    try {
+      writeValidBundle(dir);
+      writeFileSync(join(dir, 'index.md'), `okf_version: ${value}\n\n# Bundle\n`);
+      const { status } = runCheck(dir);
+      assert.equal(status, 0, `"${value}" is upstream-version-shaped and must pass`);
+    } finally {
+      rmSync(dir, { recursive: true, force: true });
+    }
+  }
+});
+
+// Scope guard: the reservation covered the value's SHAPE. Presence is a separate §3 MUST
+// that this gate still does not enforce — absent stays a non-failing echo, as before.
+test('absent okf_version is unchanged by shape enforcement (still exit 0 + MISSING echo)', () => {
+  const dir = tmpRoot();
+  try {
+    writeValidBundle(dir);
+    writeFileSync(join(dir, 'index.md'), '# Bundle\n'); // no marker at all
+    const { status, stdout } = runCheck(dir);
+    assert.equal(status, 0, 'absence must not become an error in this step');
+    assert.match(stdout, /MISSING/);
+  } finally {
+    rmSync(dir, { recursive: true, force: true });
+  }
+});
+
+test('checkBundle(): the shape verdict is on the return object', () => {
+  const bad = tmpRoot();
+  const good = tmpRoot();
+  try {
+    writeValidBundle(bad);
+    writeFileSync(join(bad, 'index.md'), 'okf_version: kb-layout-2026-06\n');
+    assert.ok(checkBundle(bad).okfVersionError, 'layout string -> an error string');
+
+    writeValidBundle(good);
+    assert.equal(checkBundle(good).okfVersionError, null, '0.1 -> no error');
+  } finally {
+    rmSync(bad, { recursive: true, force: true });
+    rmSync(good, { recursive: true, force: true });
+  }
+});