fix: lint: Ban waitForTimeout, setTimeout-as-delay, and fixed sleep patterns (#442)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

services/ponder/eslint.config.js

@@ -82,6 +82,17 @@ export default [
           message:
             "Ponder findMany() called without a limit parameter. Unbounded queries will grow without limit as the chain is indexed — never use findMany() without a limit. Always specify `limit` in the options object. Use the ring buffer pattern from docs/ARCHITECTURE.md.",
         },
+        {
+          selector: "CallExpression[callee.property.name='waitForTimeout']",
+          message:
+            '[BANNED] waitForTimeout is a fixed delay. → Subscribe to events instead (eth_newFilter for on-chain, waitForSelector/waitForURL for DOM). → Polling with timeout is acceptable only if no event source exists. → See AGENTS.md #Engineering Principles.',
+        },
+        {
+          selector:
+            "NewExpression[callee.name='Promise'] > ArrowFunctionExpression CallExpression[callee.name='setTimeout']",
+          message:
+            '[BANNED] Promise+setTimeout sleep pattern. → Use event subscription or polling with timeout instead. → See AGENTS.md #Engineering Principles.',
+        },
       ],
     },
   },

services/txnBot/eslint.config.js

@@ -62,5 +62,24 @@ export default [
       'max-statements': 'off',
     },
   },
+  {
+    name: 'arch/no-fixed-delays',
+    rules: {
+      'no-restricted-syntax': [
+        'error',
+        {
+          selector: "CallExpression[callee.property.name='waitForTimeout']",
+          message:
+            '[BANNED] waitForTimeout is a fixed delay. → Subscribe to events instead (eth_newFilter for on-chain, waitForSelector/waitForURL for DOM). → Polling with timeout is acceptable only if no event source exists. → See AGENTS.md #Engineering Principles.',
+        },
+        {
+          selector:
+            "NewExpression[callee.name='Promise'] > ArrowFunctionExpression CallExpression[callee.name='setTimeout']",
+          message:
+            '[BANNED] Promise+setTimeout sleep pattern. → Use event subscription or polling with timeout instead. → See AGENTS.md #Engineering Principles.',
+        },
+      ],
+    },
+  },
   eslintConfigPrettier,
 ];