test(okf): add running n-way per-file parity gate + adversarial corpus (STEG 3)

Make OKF §3 checker parity a RUNNING per-file red/green signal instead of a
stale one-shot claim. The catalog and okr checkers provably diverge on the same
input (catalog walks everything + no BOM/CRLF norm; okr skips innboks/dot-dirs +
normalizes); this gate turns that divergence into a monitored, tested fact.

- scripts/check-okf-parity.mjs: n-way runner, zero-dep. Normalizes each impl's
  existing checkBundle(root) return to {conceptCount, untyped[], okfVersion} and
  compares per file over default read-mode. Impl registry is availability-guarded
  so a catalog-only checkout degrades gracefully; a documented subprocess seam
  awaits llm-ingestion-okf's Python checker (fase 2) + Node port (fase 4).
- test/okf-parity-corpus/: committed byte-exact adversarial corpus + manifest.
  Red-proof fixtures (expected: diverge) the gate MUST go red on — byte axis
  (BOM+CRLF) and tree axis (innboks, dot-dir) each carry one; canon = both.
  .gitattributes -text pins the BOM/CRLF bytes. Green fixtures pin agreement
  incl. a SHARED gap (both descend into node_modules).
- check-okf-parity.test.mjs: 8/8. Corpus assertions + byte-tracking red-proof +
  runtime-materialized symlink/NFC-NFD meta-tests + graceful-skip seam.

Honest scope: only 2 impls expose a runnable per-file checker today, so the gate
runs 2-way and is architected n-way — no faked third impl, no cross-repo code.
spec §7 + log.md updated (no self-certified parity; fixes stay upstream-first).

Verified: parity 8/8, CLI exit 0; regression 33/33; check-versions 10 OK.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NeK9hkxrU9wFPBYGYnSV1V

test/okf-parity-corpus/.gitattributes

@@ -0,0 +1,4 @@
+# Parity corpus fixtures are byte-exact adversarial inputs (BOM, CRLF, LF).
+# Disable ALL git EOL/text conversion here so a contributor with core.autocrlf=true
+# cannot mangle the CRLF/BOM bytes the byte-axis fixtures depend on.
+* -text

test/okf-parity-corpus/green-baseline/index.md

@@ -0,0 +1,3 @@
+okf_version: 0.1
+
+# Bundle root

test/okf-parity-corpus/green-baseline/profile.md

@@ -0,0 +1,8 @@
+---
+type: Profile
+title: A concept
+description: A typed concept file.
+resource: about
+timestamp: 2026-07-23
+---
+# Profile

test/okf-parity-corpus/green-dupname/a/index.md

@@ -0,0 +1,3 @@
+# a
+
+Directory enumeration (no frontmatter).

test/okf-parity-corpus/green-dupname/a/note.md

@@ -0,0 +1,8 @@
+---
+type: NoteA
+title: A concept
+description: A typed concept file.
+resource: about
+timestamp: 2026-07-23
+---
+# NoteA

test/okf-parity-corpus/green-dupname/b/index.md

@@ -0,0 +1,3 @@
+# b
+
+Directory enumeration (no frontmatter).

test/okf-parity-corpus/green-dupname/b/note.md

@@ -0,0 +1,8 @@
+---
+type: NoteB
+title: A concept
+description: A typed concept file.
+resource: about
+timestamp: 2026-07-23
+---
+# NoteB

test/okf-parity-corpus/green-dupname/index.md

@@ -0,0 +1,3 @@
+okf_version: 0.1
+
+# Bundle root

test/okf-parity-corpus/green-hierarchical/index.md

@@ -0,0 +1,3 @@
+okf_version: 0.1
+
+# Bundle root

test/okf-parity-corpus/green-hierarchical/sub/child.md

@@ -0,0 +1,10 @@
+---
+type: Child
+title: Child concept
+description: Links up a level.
+resource: child
+timestamp: 2026-07-23
+---
+# Child
+
+See [top](../top.md).

test/okf-parity-corpus/green-hierarchical/sub/index.md

@@ -0,0 +1,3 @@
+# sub
+
+Directory enumeration (no frontmatter).

test/okf-parity-corpus/green-hierarchical/top.md

@@ -0,0 +1,8 @@
+---
+type: Top
+title: A concept
+description: A typed concept file.
+resource: about
+timestamp: 2026-07-23
+---
+# Top

test/okf-parity-corpus/green-nodemodules/index.md

@@ -0,0 +1,3 @@
+okf_version: 0.1
+
+# Bundle root

test/okf-parity-corpus/green-nodemodules/node_modules/dep.md

@@ -0,0 +1,4 @@
+---
+title: dep, no type
+---
+# dep

test/okf-parity-corpus/green-nodemodules/typed.md

@@ -0,0 +1,8 @@
+---
+type: Note
+title: A concept
+description: A typed concept file.
+resource: about
+timestamp: 2026-07-23
+---
+# Note

test/okf-parity-corpus/manifest.json

@@ -0,0 +1,56 @@
+{
+  "_doc": "Expected per-fixture parity outcome for check-okf-parity.mjs. The runner COMPARES actual vs this expectation; it does not judge the fasit. 'diverge' fixtures are the red-proof: the gate MUST go red on them, else the gate itself is broken. Axes are catalog-owned (trinn F D4), spec-adversarial, defined over DEFAULT read-mode (strictIngest OFF).",
+  "fixtures": {
+    "green-baseline": {
+      "axis": "baseline",
+      "expected": "agree",
+      "note": "Clean UTF-8/LF conforming bundle. Sanity anchor: proves the gate is not red-on-everything."
+    },
+    "red-byte-bom": {
+      "axis": "byte",
+      "expected": "diverge",
+      "note": "Concept file with UTF-8 BOM + CRLF that HAS type: -> catalog's /^---\\n/ fence misses the BOM (falsely untyped), okr normalizes (frontmatter.mjs:23) and reads the type. Diverges on the untyped-set with an IDENTICAL count (the 'agree OK / disagree on members' case)."
+    },
+    "red-tree-innboks": {
+      "axis": "tree",
+      "expected": "diverge",
+      "note": "innboks/ drop-zone with a raw frontmatter-less file -> catalog walks it and counts it a concept, okr skips innboks (okf-check.mjs:37-39). Diverges on conceptCount + untyped-set."
+    },
+    "red-tree-dotdir": {
+      "axis": "tree",
+      "expected": "diverge",
+      "note": ".hidden/ dot-dir with an untyped .md -> catalog descends, okr skips dot-dirs. Diverges on conceptCount + untyped-set."
+    },
+    "red-combined": {
+      "axis": "byte+tree",
+      "expected": "diverge",
+      "note": "The record's canon fixture (svar-catalog.local.md:48): a BOM+CRLF typed concept AND an innboks/ raw file in one bundle -> catalog FAIL(2 untyped) vs okr OK(0 untyped), opposite exit codes. Byte and tree axes each carry their own red proof."
+    },
+    "green-hierarchical": {
+      "axis": "tree-hierarchical",
+      "expected": "agree",
+      "note": "okr's added requirement (trinn-e-analyse:277): subdir pointers, per-level index.md, a cross-level body relation. No adversarial trigger -> both walk the hierarchy identically. Guards against a corpus that is accidentally flat."
+    },
+    "green-nodemodules": {
+      "axis": "tree",
+      "expected": "agree",
+      "note": "SHARED GAP, pinned deliberately: an untyped .md inside node_modules/. BOTH catalog and okr descend into it (okr's isWalkableDir skips only dot-dirs + innboks, not node_modules). They agree today; flagged here for future hardening of both walkers."
+    },
+    "green-dupname": {
+      "axis": "tree",
+      "expected": "agree",
+      "note": "Same basename (note.md) at two sibling levels -> both impls key on the full relative path, no basename-collapse. Guards the path.name-collapses-hierarchy class."
+    }
+  },
+  "coveredByRuntimeTests": {
+    "_doc": "These axes are git/FS-hostile as committed files on macOS, so they live as runtime-materialized meta-tests in check-okf-parity.test.mjs (temp dir), not in this committed corpus.",
+    "symlink": "Symlinked .md, symlinked dir, and a symlink loop -> both impls skip symlinks (Dirent isFile/isDirectory are false), no crash/hang. Materialized because a committed symlink degrades to a plain path-string file where core.symlinks=false.",
+    "nfc-nfd-filename": "Precomposed (NFC) vs combining (NFD) filename bytes. platform-sensitive + soft-gated: git core.precomposeunicode normalizes NFD->NFC on macOS checkout, so the divergence cannot be pinned as a committed filename. The test logs if the FS normalized it away and does not hard-fail on this axis alone."
+  },
+  "withdrawn": {
+    "verbatim-trailing-newline": "Trinn E §1 (svar-catalog.local.md:742) withdrew it: linkedin-studio's newline-free serializer applies to ingest/published/, which is excluded from the OKF bundle by design; brain/ files DO get \\n. Re-classified a writer-parameter, not a form axis."
+  },
+  "outOfScope": {
+    "sti-former": "Path-forms (~-expansion, Windows separators, plugin-root anchoring). Trinn E (authoritative over STATE) does not re-list it in the D4 axis enumeration; folded into the §1.2 resolution-order spec text -> STEG 5 discovery convention, not the STEG 3 parity corpus."
+  }
+}

test/okf-parity-corpus/red-byte-bom/bom.md

@@ -0,0 +1,5 @@
+---
+type: Note
+title: BOM concept
+---
+# BOM

test/okf-parity-corpus/red-byte-bom/index.md

@@ -0,0 +1,3 @@
+okf_version: 0.1
+
+# Bundle root

test/okf-parity-corpus/red-combined/bom.md

@@ -0,0 +1,4 @@
+---
+type: Note
+---
+# BOM

test/okf-parity-corpus/red-combined/index.md

@@ -0,0 +1,3 @@
+okf_version: 0.1
+
+# Bundle root

test/okf-parity-corpus/red-combined/innboks/raw.md

@@ -0,0 +1 @@
+raw file, no frontmatter

test/okf-parity-corpus/red-tree-dotdir/.hidden/untyped.md

@@ -0,0 +1,4 @@
+---
+title: hidden untyped
+---
+# no type

test/okf-parity-corpus/red-tree-dotdir/index.md

@@ -0,0 +1,3 @@
+okf_version: 0.1
+
+# Bundle root

test/okf-parity-corpus/red-tree-dotdir/typed.md

@@ -0,0 +1,8 @@
+---
+type: Note
+title: A concept
+description: A typed concept file.
+resource: about
+timestamp: 2026-07-23
+---
+# Note

test/okf-parity-corpus/red-tree-innboks/index.md

@@ -0,0 +1,3 @@
+okf_version: 0.1
+
+# Bundle root

test/okf-parity-corpus/red-tree-innboks/innboks/raw.md

@@ -0,0 +1 @@
+raw drop-zone file, no frontmatter

test/okf-parity-corpus/red-tree-innboks/typed.md

@@ -0,0 +1,8 @@
+---
+type: Note
+title: A concept
+description: A typed concept file.
+resource: about
+timestamp: 2026-07-23
+---
+# Note