feat(replay): extract reviewer_schema_linking gates + de-slug question fallback

extract.mjs now emits a schema-linking ui_request descriptor (columns rendered
from the model's suggested_columns, since the live catalog enrichment needs the
DWH) and parses the reviewer's "N tabelle" outcome; when neither the manifest
nor question.md is reachable, the NL question is approximated by de-slugging
the session id. replay.json regenerated from the 2026-07-06-175012 session
(18 answered gates, includes the F4 schema-linking gate).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tools/replay/extract.mjs

@@ -215,6 +215,33 @@ function buildDescriptor(name, args, idx) {
       reserved: RESERVED,
     };
   }
+  // F4 schema-linking gate (column curation, v2). The model supplies tables with
+  // kind/rationale/suggested_columns; the live gate enriches columns from the
+  // catalog via `tht schema columns` (needs DWH), so here we render only what the
+  // model provided — columns come from suggested_columns as suggested=true.
+  if (name === "reviewer_schema_linking") {
+    const tables = parseOptions(args.tables).map((t) => ({
+      id: t.id,
+      name: t.name,
+      kind: t.kind ?? "promote",
+      recommended: !!t.recommended,
+      description: t.description ?? null,
+      rationale: t.rationale ?? null,
+      columns: (parseOptions(t.suggested_columns).map((c) =>
+        typeof c === "string" ? { name: c, description: null, suggested: true } : c,
+      )),
+    }));
+    return {
+      type: "ui_request",
+      id,
+      phase,
+      schema_version: SCHEMA_VERSION,
+      widget: "schema-linking",
+      title: args.title,
+      tables,
+      reserved: RESERVED,
+    };
+  }
   return null;
 }
 
@@ -263,6 +290,11 @@ function parseRealChoice(name, descriptor, resultText) {
     if (/Rifiutato/i.test(t)) return { labels: ["Rifiuta"], note: t };
     return { labels: [], note: t };
   }
+  if (name === "reviewer_schema_linking") {
+    // "Schema linking registrato dal reviewer (6 tabelle + colonne curate)."
+    const m = t.match(/registrato dal reviewer \((\d+)\s+tabelle/);
+    return { labels: m ? [`${m[1]} tabelle`] : [], note: t };
+  }
   return { labels: [], note: t };
 }
 
@@ -303,6 +335,17 @@ function readSessionQuestion(sid) {
   return null;
 }
 
+// Last-resort fallback when neither the manifest nor question.md can be found
+// (e.g. the workspace repo is not checked out here). `tht session new` derives
+// the session id slug from the question text, so de-slugging it recovers a
+// readable approximation of the original NL question.
+function questionFromSessionId(sid) {
+  if (typeof sid !== "string") return null;
+  const slug = sid.replace(/^\d{4}-\d{2}-\d{2}-\d{6}-/, "");
+  if (!slug) return null;
+  return slug.replace(/-/g, " ");
+}
+
 // Resolve a session id to its on-disk directory. We check every workspace yaml
 // in harness/workspaces/ for a `paths.sessions` entry (relative OR absolute),
 // then look for <sessions>/<session-id>/ in each. Workspaces are symlinks to
@@ -350,7 +393,7 @@ const replay = {
   },
   session: {
     id: sessionId,
-    question: readSessionQuestion(sessionId),
+    question: readSessionQuestion(sessionId) ?? questionFromSessionId(sessionId),
     created_at: createdAt,
   },
   stats: {