diff --git a/docs/code-bridge/requests/REQ-2026-04-15-subscriber-wiki-auth.md b/docs/code-bridge/archive/REQ-2026-04-15-subscriber-wiki-auth.md
similarity index 100%
rename from docs/code-bridge/requests/REQ-2026-04-15-subscriber-wiki-auth.md
rename to docs/code-bridge/archive/REQ-2026-04-15-subscriber-wiki-auth.md
diff --git a/docs/code-bridge/requests/REQ-2026-04-16-modpack-installer.md b/docs/code-bridge/archive/REQ-2026-04-16-modpack-installer.md
similarity index 100%
rename from docs/code-bridge/requests/REQ-2026-04-16-modpack-installer.md
rename to docs/code-bridge/archive/REQ-2026-04-16-modpack-installer.md
diff --git a/docs/code-bridge/requests/RES-2026-04-15-subscriber-wiki-auth.md b/docs/code-bridge/archive/RES-2026-04-15-subscriber-wiki-auth.md
similarity index 100%
rename from docs/code-bridge/requests/RES-2026-04-15-subscriber-wiki-auth.md
rename to docs/code-bridge/archive/RES-2026-04-15-subscriber-wiki-auth.md
diff --git a/services/arbiter-3.0/.env.example b/services/arbiter-3.0/.env.example
index 9ee14cc..306bb75 100644
--- a/services/arbiter-3.0/.env.example
+++ b/services/arbiter-3.0/.env.example
@@ -28,3 +28,12 @@ MINECRAFT_NEST_IDS=1,6,7
 STRIPE_SECRET_KEY=sk_test_... # or sk_live_... for production
 STRIPE_WEBHOOK_SECRET=whsec_... # Get from Stripe Dashboard webhook settings
 BASE_URL=https://discord-bot.firefrostgaming.com # For checkout redirect URLs
+
+# Wiki.js Subscriber Wiki (subscribers.firefrostgaming.com)
+# Generate key in Wiki.js Admin → API Access. Groups (Awakened thru Sovereign)
+# must be pre-created in Wiki.js admin panel before syncing.
+WIKIJS_URL=https://subscribers.firefrostgaming.com
+WIKIJS_API_KEY=
+
+# Discord Webhooks (optional — silent-skip if unset)
+DISCORD_ISSUE_WEBHOOK_URL=
diff --git a/services/arbiter-3.0/src/routes/stripe.js b/services/arbiter-3.0/src/routes/stripe.js
index cad932d..1eb0f0f 100644
--- a/services/arbiter-3.0/src/routes/stripe.js
+++ b/services/arbiter-3.0/src/routes/stripe.js
@@ -15,6 +15,7 @@ const { syncRole, removeAllRoles, downgradeToAwakened } = require('../services/d
 const { welcomeNewMember } = require('../services/awakenedConcierge');
 const { syncLuckPermsMeta } = require('../services/luckpermsSync');
 const { logAction } = require('../services/discordActionLog');
+const { syncWikiUser, demoteToAwakened: demoteWikiToAwakened } = require('../services/wikijsSync');
 
 // CORS configuration for checkout endpoint
 const corsOptions = {
@@ -298,6 +299,12 @@ router.post('/webhook', express.raw({ type: 'application/json' }), async (req, r
             }
           }).catch(err => console.error('[LPSync] Background sync error:', err.message));
 
+          // Sync Wiki.js subscriber group (non-blocking, silent-fail)
+          // REQ-2026-04-15-subscriber-wiki-auth (Task #138)
+          syncWikiUser(discordId, req.user?.username || discordId, tierLevel)
+            .then(r => { if (r.success) console.log(`📚 WikiSync checkout: ${discordId} → ${r.group}`); })
+            .catch(err => console.error('[WikiSync] checkout error:', err.message));
+
           // Carl-bot migration: link-reminder DM for Awakened+ subscribers (non-blocking, silent-fail)
           // REQ-2026-04-15-reaction-roles (Chronicler #92)
           (async () => {
@@ -368,6 +375,10 @@ router.post('/webhook', express.raw({ type: 'application/json' }), async (req, r
           const discordId = subRow.rows[0].discord_id;
           const roleResult = await downgradeToAwakened(discordId);
           console.log(`⬇️  Subscription ended for ${discordId}, demoted to Awakened: ${roleResult.message}`);
+
+          // Demote Wiki.js group to Awakened (non-blocking, silent-fail)
+          demoteWikiToAwakened(discordId)
+            .catch(err => console.error('[WikiSync] demote error:', err.message));
           
           await client.query(`
             INSERT INTO admin_audit_log (action_type, target_identifier, details)
@@ -462,6 +473,8 @@ router.post('/webhook', express.raw({ type: 'application/json' }), async (req, r
           // Remove all Discord roles
           const roleResult = await removeAllRoles(discordId);
           console.log(`🚫 Chargeback role removal for ${discordId}: ${roleResult.message}`);
+          demoteWikiToAwakened(discordId)
+            .catch(err => console.error('[WikiSync] chargeback demote error:', err.message));
         }
         
         await client.query(`
@@ -528,6 +541,8 @@ router.post('/webhook', express.raw({ type: 'application/json' }), async (req, r
           // Remove ALL roles including Awakened (hard ban)
           const roleResult = await removeAllRoles(discordId);
           console.log(`🚫 Refund ban for ${discordId}: ${roleResult.message}`);
+          demoteWikiToAwakened(discordId)
+            .catch(err => console.error('[WikiSync] refund ban demote error:', err.message));
         }
         
         await client.query(`
diff --git a/services/arbiter-3.0/src/services/wikijsSync.js b/services/arbiter-3.0/src/services/wikijsSync.js
new file mode 100644
index 0000000..7057a73
--- /dev/null
+++ b/services/arbiter-3.0/src/services/wikijsSync.js
@@ -0,0 +1,175 @@
+/**
+ * Wiki.js Tier Sync — syncs subscriber tier groups in Wiki.js via GraphQL API.
+ * REQ-2026-04-15-subscriber-wiki-auth (Chronicler #92, Task #138)
+ *
+ * Wiki.js is deployed at subscribers.firefrostgaming.com. Auth via API key.
+ * User email convention: {discordId}@firefrost.local (unique, internal).
+ *
+ * Pre-requisites (Michael does once in Wiki.js admin panel):
+ *   1. Create 6 groups: Awakened, Elemental, Knight, Master, Legend, Sovereign
+ *   2. Generate API key: Admin → API Access → add key → copy to .env
+ *
+ * Silent-fail pattern: never let wiki sync break the Stripe webhook.
+ */
+
+const axios = require('axios');
+
+const WIKIJS_URL = process.env.WIKIJS_URL || 'https://subscribers.firefrostgaming.com';
+const WIKIJS_API_KEY = process.env.WIKIJS_API_KEY || '';
+
+// tier_level (from Stripe webhook) → Wiki.js group name
+const TIER_GROUP_MAP = {
+  1: 'Awakened',
+  2: 'Elemental',
+  3: 'Knight',
+  4: 'Master',
+  5: 'Legend',
+  6: 'Sovereign'
+};
+
+/**
+ * Execute a GraphQL query/mutation against Wiki.js.
+ */
+async function gql(query, variables) {
+  if (!WIKIJS_API_KEY) {
+    console.warn('[WikiSync] WIKIJS_API_KEY not set — skipping');
+    return null;
+  }
+  const resp = await axios.post(
+    `${WIKIJS_URL}/graphql`,
+    { query, variables },
+    {
+      headers: {
+        'Authorization': `Bearer ${WIKIJS_API_KEY}`,
+        'Content-Type': 'application/json'
+      },
+      timeout: 10000
+    }
+  );
+  return resp.data;
+}
+
+/**
+ * Fetch all Wiki.js groups and return a map of name → id.
+ */
+async function getGroupMap() {
+  const result = await gql(`
+    query {
+      groups {
+        list { id name }
+      }
+    }
+  `);
+  const groups = result?.data?.groups?.list || [];
+  const map = {};
+  for (const g of groups) {
+    map[g.name] = g.id;
+  }
+  return map;
+}
+
+/**
+ * Search for a Wiki.js user by their internal email ({discordId}@firefrost.local).
+ * Returns { id, email } or null.
+ */
+async function findUser(discordId) {
+  const email = `${discordId}@firefrost.local`;
+  const result = await gql(`
+    query ($query: String!) {
+      users {
+        search(query: $query) { id email }
+      }
+    }
+  `, { query: email });
+  const users = result?.data?.users?.search || [];
+  return users.find(u => u.email === email) || null;
+}
+
+/**
+ * Create a Wiki.js user for the given Discord subscriber.
+ */
+async function createUser(discordId, username, groupIds) {
+  const email = `${discordId}@firefrost.local`;
+  const result = await gql(`
+    mutation ($email: String!, $name: String!, $groups: [Int!]!) {
+      users {
+        create(email: $email, name: $name, passwordRaw: "", providerKey: "discord", groups: $groups) {
+          responseResult { succeeded message }
+        }
+      }
+    }
+  `, { email, name: username || discordId, groups: groupIds });
+  const res = result?.data?.users?.create?.responseResult;
+  if (res && !res.succeeded) {
+    throw new Error(`Wiki.js create failed: ${res.message}`);
+  }
+  return res;
+}
+
+/**
+ * Update a Wiki.js user's group assignment.
+ */
+async function updateUserGroups(userId, groupIds) {
+  const result = await gql(`
+    mutation ($id: Int!, $groups: [Int!]!) {
+      users {
+        update(id: $id, groups: $groups) {
+          responseResult { succeeded message }
+        }
+      }
+    }
+  `, { id: userId, groups: groupIds });
+  const res = result?.data?.users?.update?.responseResult;
+  if (res && !res.succeeded) {
+    throw new Error(`Wiki.js update failed: ${res.message}`);
+  }
+  return res;
+}
+
+/**
+ * Sync a subscriber's Wiki.js group to match their Stripe tier.
+ * Creates user if not exists, updates group if they do.
+ *
+ * @param {string} discordId
+ * @param {string} username  — Discord display name
+ * @param {number} tierLevel — 1-6 from Stripe webhook
+ */
+async function syncWikiUser(discordId, username, tierLevel) {
+  if (!WIKIJS_API_KEY) {
+    console.warn('[WikiSync] WIKIJS_API_KEY not set — skipping');
+    return { success: false, reason: 'no API key' };
+  }
+
+  const groupName = TIER_GROUP_MAP[tierLevel];
+  if (!groupName) {
+    console.warn(`[WikiSync] Unknown tier level ${tierLevel} — skipping`);
+    return { success: false, reason: `unknown tier ${tierLevel}` };
+  }
+
+  const groupMap = await getGroupMap();
+  const groupId = groupMap[groupName];
+  if (!groupId) {
+    console.error(`[WikiSync] Group '${groupName}' not found in Wiki.js — did Michael create it?`);
+    return { success: false, reason: `group '${groupName}' missing` };
+  }
+
+  const existing = await findUser(discordId);
+  if (existing) {
+    await updateUserGroups(existing.id, [groupId]);
+    console.log(`📚 [WikiSync] Updated ${username} (${discordId}) → ${groupName}`);
+  } else {
+    await createUser(discordId, username, [groupId]);
+    console.log(`📚 [WikiSync] Created ${username} (${discordId}) → ${groupName}`);
+  }
+
+  return { success: true, group: groupName };
+}
+
+/**
+ * Demote a subscriber to Awakened group (on cancellation/grace period).
+ */
+async function demoteToAwakened(discordId) {
+  return syncWikiUser(discordId, null, 1);
+}
+
+module.exports = { syncWikiUser, demoteToAwakened };