ci(anchors): accept intentional chapitre 1 anchor reset

config/anchor-churn-allowlist.json

@@ -0,0 +1,5 @@
+{
+  "accepted_resets": {
+    "archicrat-ia/chapitre-1/index.html": "Reset intentionnel des ancres après révision doctrinale substantielle du chapitre 1. Site neuf, sans annotations ni compatibilité descendante à préserver."
+  }
+}

scripts/check-anchors.mjs

@@ -74,7 +74,24 @@ function loadAllowMissing() {
   return new Set(arr.map(String));
 }
 
+function loadAcceptedResets() {
+  const p = path.resolve("config/anchor-churn-allowlist.json");
+  if (!fssync.existsSync(p)) return {};
+  const raw = fssync.readFileSync(p, "utf8").trim();
+  if (!raw) return {};
+  const data = JSON.parse(raw);
+  if (!data || typeof data !== "object" || Array.isArray(data)) {
+    throw new Error("anchor-churn-allowlist.json must be an object");
+  }
+  const accepted = data.accepted_resets || {};
+  if (!accepted || typeof accepted !== "object" || Array.isArray(accepted)) {
+    throw new Error("anchor-churn-allowlist.json: accepted_resets must be an object");
+  }
+  return accepted;
+}
+
 const ALLOW_MISSING = loadAllowMissing();
+const ACCEPTED_RESETS = loadAcceptedResets();
 
 async function buildSnapshot() {
   const absDist = path.resolve(DIST_DIR);
@@ -139,6 +156,7 @@ function diffPage(prevIds, curIds) {
 
   let failed = false;
   let changedPages = 0;
+  let acceptedPages = 0;
 
   for (const p of pages) {
     const prevIds = base[p] || null;
@@ -172,6 +190,7 @@ function diffPage(prevIds, curIds) {
     const prevN = prevIds.length || 1;
     const churn = (added.length + removed.length) / prevN;
     const removedRatio = removed.length / prevN;
+    const acceptedReason = ACCEPTED_RESETS[p] || null;
 
     console.log(
       `~ ${p} prev=${prevIds.length} now=${curIds.length}` +
@@ -182,11 +201,23 @@ function diffPage(prevIds, curIds) {
       console.log(`  removed: ${removed.slice(0, 20).join(", ")}${removed.length > 20 ? " …" : ""}`);
     }
 
-    if (prevIds.length >= MIN_PREV && churn > THRESHOLD) failed = true;
-    if (prevIds.length >= MIN_PREV && removedRatio > THRESHOLD) failed = true;
+    const exceeds =
+      (prevIds.length >= MIN_PREV && churn > THRESHOLD) ||
+      (prevIds.length >= MIN_PREV && removedRatio > THRESHOLD);
+
+    if (exceeds && acceptedReason) {
+      acceptedPages += 1;
+      console.log(`  ✅ accepted reset: ${acceptedReason}`);
+      continue;
     }
 
-  console.log(`\nSummary: pages compared=${pages.length}, pages changed=${changedPages}`);
+    if (exceeds) failed = true;
+  }
+
+  console.log(
+    `\nSummary: pages compared=${pages.length}, pages changed=${changedPages}, accepted resets=${acceptedPages}`
+  );
+
   if (failed) {
     console.error(`FAIL: anchor churn above threshold (threshold=${pct(THRESHOLD)} minPrev=${MIN_PREV})`);
     process.exit(1);