Fix pre-merge review items: env docs, skills list, stray console.error

- Add missing server-side env vars to app/.env.example (PRIVY_APP_ID,
  PRIVY_APP_SECRET, callback signing keys)
- Add 6 missing skills to README table (uniswap, bridging, building,
  identity, upvoting, bigcoin)
- Remove redundant console.error in useSessionWizardState (error
  already surfaced via markCreationError)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jarrodwatts

README.md

@@ -215,6 +215,12 @@ Available skills:
 | `executing-agw-transactions` | Preview-first execution rules for signing and sends |
 | `discovering-abstract-portal` | App and Portal stream discovery |
 | `trading-on-aborean` | Aborean Finance protocol workflows |
+| `trading-on-uniswap` | Uniswap V2+V3 swaps and liquidity on Abstract |
+| `bridging-to-abstract` | Native bridge and third-party bridge options |
+| `building-on-abstract` | Developer onboarding, deployment, paymasters, session keys |
+| `managing-agent-identity` | ERC-8004 agent registration and reputation |
+| `upvoting-on-abstract` | Abstract Portal on-chain voting |
+| `mining-with-bigcoin` | Bigcoin virtual mining simulator |
 
 ## Agent Host Extensions
 

app/.env.example

@@ -1,4 +1,14 @@
+# --- Client-side (bundled into browser JS) ---
 NEXT_PUBLIC_CHAIN_ENV=testnet
 NEXT_PUBLIC_WALLET_CONNECT_PROJECT_ID=
 NEXT_PUBLIC_PRIVY_APP_ID=
 NEXT_PUBLIC_PRIVY_CLIENT_ID=
+
+# --- Server-side (API routes only, never exposed to browser) ---
+PRIVY_APP_ID=
+PRIVY_APP_SECRET=
+
+# Callback attestation signing (optional in dev — ephemeral key auto-generated)
+AGW_MCP_CALLBACK_SIGNING_PRIVATE_KEY=
+AGW_MCP_CALLBACK_SIGNING_PUBLIC_KEY=
+AGW_MCP_CALLBACK_SIGNING_ISSUER=

app/src/hooks/useSessionWizardState.ts

@@ -84,7 +84,6 @@ export function useSessionWizardState() {
         });
       } catch (err) {
         if (cancelled) return;
-        console.error('Failed to resolve AGW account from signer', err);
         markCreationError(
           `Failed to verify AGW on-chain: ${err instanceof Error ? err.message : String(err)}`,
         );