fix(docs): validate strict channel json fences

docs/channels/broadcast-groups.md

@@ -258,15 +258,17 @@ In group `120363403215116621@g.us` with agents `["alfred", "baerbel"]`:
     {
       "agents": {
         "reviewer": {
-          "tools": { "allow": ["read", "exec"] } // Read-only
+          "tools": { "allow": ["read", "exec"] }
         },
         "fixer": {
-          "tools": { "allow": ["read", "write", "edit", "exec"] } // Read-write
+          "tools": { "allow": ["read", "write", "edit", "exec"] }
         }
       }
     }
     ```
 
+    `reviewer` is read-only. `fixer` can read and write.
+
   </Accordion>
   <Accordion title="4. Monitor performance">
     With many agents, consider:

docs/channels/slack.md

@@ -251,7 +251,19 @@ For **HTTP Request URLs mode**, replace `settings` with the HTTP variant and add
     "event_subscriptions": {
       "request_url": "https://gateway-host.example.com/slack/events",
       "bot_events": [
-        /* same as Socket Mode */
+        "app_home_opened",
+        "app_mention",
+        "channel_rename",
+        "member_joined_channel",
+        "member_left_channel",
+        "message.channels",
+        "message.groups",
+        "message.im",
+        "message.mpim",
+        "pin_added",
+        "pin_removed",
+        "reaction_added",
+        "reaction_removed"
       ]
     },
     "interactivity": {
@@ -420,11 +432,12 @@ The default manifest enables the Slack App Home **Home** tab and subscribes to `
       "description": "Show the short help summary",
       "url": "https://gateway-host.example.com/slack/events"
     }
-    // ...repeat for every command with the same `url` value
   ]
 }
 ```
 
+        Repeat that `url` value on every command in the list.
+
       </Tab>
     </Tabs>
 

src/docs/channel-config-examples.test.ts

@@ -22,10 +22,17 @@ describe("channel docs config examples", () => {
       for (const match of blocks) {
         const code = match[1] ?? "";
         const location = `${fileName}:${lineNumberAt(markdown, match.index ?? 0)}`;
+        const isStrictJson = match[0].startsWith("```json\n");
         try {
-          JSON5.parse(code);
+          if (isStrictJson) {
+            JSON.parse(code);
+          } else {
+            JSON5.parse(code);
+          }
         } catch (error) {
-          failures.push(`${location} JSON5 parse failed: ${String(error)}`);
+          failures.push(
+            `${location} ${isStrictJson ? "JSON" : "JSON5"} parse failed: ${String(error)}`,
+          );
         }
       }
     }