Pin the suite run, gate the exception list, and trim the corpus README

corpus/README.md

@@ -12,12 +12,9 @@ One directory per contract kind, each landing with its milestone:
   pins which error.
 - `real-payloads/` — `<name>.json`: sanitized live ADF, round-tripped ADF→markdown→ADF. No
   expected markdown.
-- `commonmark-spec/` — `spec.json` (the pinned CommonMark suite, read as corpus data per
+- `commonmark-spec/` — `spec.json` (the CommonMark 0.31.2 suite, vendored byte-exact) and
-  AGENTS.md §1) and `exceptions.json` (examples a documented divergence exempts, keyed by
+  `exceptions.json` (the examples a known divergence exempts, keyed by `check` and `example` with
-  `check` and `example` with a `reason`). Three checks an example must pass: the §2 canonical
+  a `reason`).
-  fixpoint — a named error, or markdown that parses and emits back to itself; the reference HTML's
-  text, tags stripped and entities decoded, against the parsed document's concatenated text; and a
-  count of the CommonMark subset's elements against the nodes and marks they map to.
 
 JSON is editor-normal (AGENTS.md §2), two-space indent, keys sorted. `spec.json` is the vendored,
 upstream machine-readable suite (CommonMark 0.31.2, CC-BY-SA-4.0, © John MacFarlane) and is not

src/commonmark-spec.test.ts

@@ -56,8 +56,8 @@ const spec = readSpec()
 const exceptions = readExceptions()
 const exceptionIndex = new Map(exceptions.map((entry) => [`${entry.example}:${entry.check}`, entry.reason]))
 
-test('the CommonMark spec suite is the version the parser names', () => {
+test('the CommonMark spec suite is the pinned 0.31.2 run', () => {
-  assert.ok(spec.length > 600, `spec.json holds ${spec.length} examples, not a full suite`)
+  assert.equal(spec.length, 652)
 })
 
 test('the exception list is unique per example and check', () => {

src/corpus.test.ts

@@ -53,7 +53,7 @@ function pairedNames(root: string, first: string, second: string): string[] {
 function corpusJsonPaths(): string[] {
   return readdirSync(corpusRoot, { encoding: 'utf8', recursive: true })
     .filter((name) => name.endsWith('.json'))
-    .filter((name) => !name.startsWith(`commonmark-spec${sep}`))
+    .filter((name) => name !== `commonmark-spec${sep}spec.json`)
     .map((name) => join(corpusRoot, name))
     .sort()
 }