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Stackfinch (스택핀치) is a Korean and English technology blog about AI tools, coding, agents, MCP, skills, and automation. We check official documentation for features, limitations, and changes, aiming to provide explanations that readers can put to practical use.

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The blog is published and edited under the name Stackfinch (스택핀치). We distinguish information we have directly checked from explanations based on official sources, without claiming unverified credentials or professional titles.

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Codex CLI 0.163.0 Guide: Steer Active Turns, Search Settings, and Verify Security

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OpenAI released Codex CLI 0.163.0 as a stable build on October 15, 2026. This is more than a model refresh. It changes how you control a running agent, find settings, restart managed services, and resume saved work without losing the permission context that belonged to the thread. The most visible addition is immediate steering: you can send a follow-up while Codex is still responding instead of waiting for the turn to finish. The release also introduces a searchable /config panel, configurable leader shortcuts, a managed-server restart flow, parallel read-only lookups, and security fixes around resumed permissions and the command network proxy. What matters most Steer an active response with a follow-up message. Search settings in /config and see whether a change is live or needs a restart. Configure a leader key in /keymap and restart a managed server from /daemon . Resume a saved thread with its permissions and network approvals restored, subject to c...
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Shopify Shop MCP Guide: Product Search, Carts, Shop Pay, and Buyer Consent

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An AI shopping agent needs more than product search. To move from a recommendation to a real purchase, it must handle catalog data, availability, variants, carts, buyer identity, checkout status, payment approval, and consent without blurring who is responsible for the sale. Shopify launched Shop MCP on October 13, 2026 as a public connection for MCP-compatible agents. On October 16, Shopify also added UCP buyer-consent support to Cart MCP and Checkout MCP. This guide does not treat Shop MCP as an automatic-buy button. It starts with a read-only terminal search, then explains how to connect an agent, decide between a cart and a checkout, preserve explicit buyer approval, negotiate consent, verify completion, and recover from common failures. The steps and limits are based on Shopify's public documentation rather than an unverified purchase test. What you need to know first The public Shop MCP endpoint is https://mcp.shop.com , and catalog search can be tested without an API ...
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WhatsApp Business Tools MCP Guide: Set Up Messaging with Codex or Claude

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Setting up WhatsApp Business Platform usually means moving among the Developer Console, Business Manager, API documentation, and a code editor while you align a business, an app, a phone number, message templates, and webhooks. Meta announced WhatsApp Business Tools MCP on September 15, 2026 to bring that sequence into AI coding tools such as Claude Code, Codex, and ChatGPT. This is not a license to hand production messaging to an autonomous agent. The server is in beta, is rolling out gradually, and is intended for development and testing workflows rather than production sending at scale. Actions that register a number, change account configuration, or send a message still require careful review of permissions, targets, and cost. Based on Meta's official announcement and documentation checked on September 22, 2026, this guide explains what to prepare, how to connect safely, and where a human should stop and verify the result. Quick answer The remote server endpoint is http...
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