fix(harness): recover schema table name typos

harness/.pi/extensions/tht-gate.js

@@ -367,6 +367,50 @@ function currentPhase(ctx, session) {
 	return m ? parseInt(m[1], 10) : 1;
 }
 
+// --- fuzzy table-name matching (prevents multi-turn debug loops on typos) ---
+
+function levenshtein(a, b) {
+	if (a === b) return 0;
+	const la = a.length, lb = b.length;
+	if (!la) return lb;
+	if (!lb) return la;
+	let prev = Array.from({ length: lb + 1 }, (_, i) => i);
+	for (let i = 1; i <= la; i++) {
+		const cur = [i];
+		for (let j = 1; j <= lb; j++) {
+			cur[j] = Math.min(prev[j] + 1, cur[j - 1] + 1, prev[j - 1] + (a[i - 1] !== b[j - 1] ? 1 : 0));
+		}
+		prev = cur;
+	}
+	return prev[lb];
+}
+
+const _catalogNamesCache = new Map();
+function catalogTableNames(ctx) {
+	const key = ctx.cwd ?? "";
+	if (_catalogNamesCache.has(key)) return _catalogNamesCache.get(key);
+	let names;
+	try {
+		const raw = tht(ctx, ["schema", "render", "--format", "mschema-text"]);
+		names = [...raw.matchAll(/^CREATE TABLE (\S+)/gm)].map((m) => m[1]);
+	} catch {
+		names = [];
+	}
+	_catalogNamesCache.set(key, names);
+	return names;
+}
+
+function closestTableName(ctx, name, maxDist = 3) {
+	const names = catalogTableNames(ctx);
+	let best = null, bestDist = maxDist + 1;
+	for (const n of names) {
+		if (Math.abs(n.length - name.length) > maxDist) continue;
+		const d = levenshtein(n, name);
+		if (d < bestDist) { bestDist = d; best = n; }
+	}
+	return best;
+}
+
 // tht phase advance --auto: exit 6 = not ready / needs human (silent no-op), others propagated.
 // Used for the fire-and-forget auto-advance of the auto phases (F2 memory, F6 cte) after a
 // reviewer_decide: it only advances when the phase is auto-eligible (zero substantive
@@ -978,10 +1022,23 @@ export default function (pi) {
 				try {
 					cat = JSON.parse(tht(ctx, ["schema", "columns", t.name, "--json"]));
 				} catch (e) {
-					const msg = (e.stderr || e.message || String(e)).toString().trim();
-					return textResult(
-						`Tabella '${t.name}' non caricabile dal catalogo (${msg}). Proponi solo tabelle presenti nel catalogo (usa 'tht schema render' / 'tht search' per verificarne i nomi).`,
-					);
+					// Fuzzy recovery: the model often misspells Italian table names
+					// (e.g. "abellazione" vs "ablazione"). Auto-correct if a close
+					// catalog match exists, preventing a multi-turn debug spiral.
+					const fix = closestTableName(ctx, t.name);
+					if (fix) {
+						try {
+							cat = JSON.parse(tht(ctx, ["schema", "columns", fix, "--json"]));
+							t.id = fix;
+							t.name = fix;
+						} catch { /* fall through to error */ }
+					}
+					if (!cat) {
+						const msg = (e.stderr || e.message || String(e)).toString().trim();
+						return textResult(
+							`Tabella '${t.name}' non caricabile dal catalogo (${msg}). Proponi solo tabelle presenti nel catalogo (usa 'tht schema render' / 'tht search' per verificarne i nomi).`,
+						);
+					}
 				}
 				if (!Array.isArray(cat.columns)) {
 					return textResult(`Catalogo per '${t.name}' non contiene colonne valide. Verifica con 'tht schema columns ${t.name} --json'.`);