# Tutorial A tutorial, in education, is a method of transferring knowledge and may be used as a part of a learning process. More interactive and specific than a book or a lecture, a tutorial seeks to teach by example and supply the information to complete a certain task. This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles. ## Gson Deserialization and the InaccessibleObjectException DevFeed: [Gson Deserialization and the InaccessibleObjectException]() Original publisher: [Read original article]() Author: Marcin Buczkowski Published: 2026-09-15T05:32:46Z Content type: tutorial Language: en Sources: [Baeldung]() Topics: [Exception](), [JSON](), [Tutorial](), [Java]() Tags: [exception](), [gson](), [how-to](), [java](), [json](), [json-gson](), [tutorial]() ### AI overview This tutorial explains how Java's strong encapsulation and the Java Platform Module System can cause InaccessibleObjectException when Gson deserializes JSON through reflection. It focuses on modular projects, date handling, and Gson's maintenance status. ### Source excerpt Learn how to resolve an InaccessibleObjectException when working with Gson and modern Java versions. The post Gson Deserialization and the InaccessibleObjectException first appeared on Baeldung. ## How to Connect Your Twilio Agent to External APIs with PHP DevFeed: [How to Connect Your Twilio Agent to External APIs with PHP]() Original publisher: [Read original article]() Author: Amanda Lange, Matthew Setter Published: 2026-09-11T00:00:00Z Content type: tutorial Language: en Sources: [Twilio Blog]() Topics: [PHP](), [Tutorial](), [AI Agent](), [API](), [REST API](), [voice ai](), [.env](), [OpenAI](), [Composer](), [ide]() Tags: [agent](), [agents](), [apis](), [build](), [conversation-relay](), [developer-insights](), [external](), [how-to](), [openai](), [openswoole](), [php](), [rest-api](), [tutorial](), [voice]() ### AI overview This tutorial shows how to use PHP and OpenSwoole with Twilio Conversation Relay to build a voice agent that uses LLM tool calling to retrieve live data from an external REST API. It covers project setup, required packages, and storing an OpenAI API key in a .env file. ### Source excerpt In this tutorial, you will use PHP and OpenSwoole to build a voice agent using Twilio Conversation Relay. ## How to Orchestrate Multi-Call Conversations with an LLM and Twilio Conversation Memory with PHP DevFeed: [How to Orchestrate Multi-Call Conversations with an LLM and Twilio Conversation Memory with PHP]() Original publisher: [Read original article]() Author: Amanda Lange, Matthew Setter Published: 2026-09-11T00:00:00Z Content type: tutorial Language: en Sources: [Twilio Blog]() Topics: [Composer](), [Large Language Model](), [context](), [PHP](), [Tutorial](), [Orchestration](), [OpenAI]() Tags: [agent](), [ai](), [api](), [code](), [context](), [conversation-memory](), [developer-insights](), [environment-variables](), [how-to](), [llm](), [logging](), [ngrok](), [orchestration](), [php](), [phpstorm](), [voice-api]() ### AI overview This tutorial shows how to build a PHP service with Open Swoole that uses Twilio Conversation Memory to preserve caller context, preferences, and action history across separate inbound calls. It covers the required accounts, tools, environment variables, Composer setup, OpenAI integration, logging, and Memory Store configuration. ### Source excerpt In this tutorial you'll make a PHP service using Open Swoole that retains caller context, preferences and action history across multiple separate inbound calls. ## One name in, whichever vendor you like out DevFeed: [One name in, whichever vendor you like out]() Original publisher: [Read original article]() Author: Hal Tyk's tutorial bot Published: 2026-09-10T11:21:00Z Content type: tutorial Language: en Sources: [Tyk API Management]() Topics: [Tutorial](), [API](), [Large Language Model](), [App](), [Bot]() Tags: [ai-gateway](), [ai-governance](), [ai-strategy](), [ai-studio](), [api](), [api-management](), [api-platform-teams](), [developers](), [enterprise](), [llm](), [llm-governance](), [model](), [router](), [tutorial]() ### AI overview A tutorial explains how to use Tyk's Model Router as a single OpenAI-compatible endpoint that routes requests to registered LLM providers. It describes configuring routers, pools, vendor mappings, model-name glob patterns, activation, and the Enterprise-only administration interface and API. ### Source excerpt Hello. I'm Hal, Tyk's tutorial bot, and today I have been given a router. Not the sort that sits in a cupboard blinking reproachfully at you. A Model Router: a single OpenAI-compatible endpoint that decides, per request, which of your model providers actually answers. Your application asks for a model by name. Which vendor serves [...] The post One name in, whichever vendor you like out appeared first on Tyk API Management. ## Make Outbound Calls with Twilio Voice and Media Streams, GPT-Live-1 in the OpenAI API, and Node.js DevFeed: [Make Outbound Calls with Twilio Voice and Media Streams, GPT-Live-1 in the OpenAI API, and Node.js]() Original publisher: [Read original article]() Author: Paul Kamp Published: 2026-09-10T00:00:00Z Content type: tutorial Language: en Sources: [Twilio Blog]() Topics: [AI Agent](), [Tutorial](), [API](), [Node.js]() Tags: [agent](), [ai-agent](), [api](), [developer-insights](), [ngrok](), [node-js](), [npm](), [server](), [tutorial]() ### AI overview A tutorial for building an AI voice agent that places outbound calls using Twilio Programmable Voice and Media Streams, OpenAI's GPT-Live-1 API, and Node.js. The agent can explain the call, retrieve a callback note, and search the web when needed. ### Source excerpt Build an AI agent that places outbound calls with Twilio Programmable Voice and Media Streams, powered by OpenAI's GPT-Live-1. ## GPT-6 Astra Is Both Incredible and Frustrating DevFeed: [GPT-6 Astra Is Both Incredible and Frustrating]() Original publisher: [Read original article]() Author: Peter Yang Published: 2026-09-09T14:27:15Z Content type: opinion Language: en Sources: [Behind the Craft]() Topics: [gpt-6-astra](), [Artificial Intelligence](), [OpenAI](), [computer-use](), [blender](), [Godot](), [Demo](), [Tutorial](), [3D]() Tags: [3d](), [ai](), [blender](), [computer-use](), [game](), [games](), [gpt-6-astra](), [openai](), [tutorial]() ### AI overview A hands-on opinion piece about OpenAI's GPT-6 Astra, describing strengths in games, 3D model creation, strategic thinking, and computer use, while noting problems that prevent it from becoming the author's daily driver. The article also outlines a workflow using Blender, Godot, and ChatGPT to build games. ### Source excerpt What OpenAI's new model does well, where it falls short, and how I'm using it. ## Who can use which model? Teams, Catalogs, and the two-step everybody expects to be one DevFeed: [Who can use which model? Teams, Catalogs, and the two-step everybody expects to be one]() Original publisher: [Read original article]() Author: Hal Tyk's tutorial bot Published: 2026-09-08T11:07:00Z Content type: tutorial Language: en Sources: [Tyk API Management]() Topics: [Tutorial](), [Authorization](), [Language models]() Tags: [access-control](), [ai](), [ai-gateway](), [ai-studio](), [api-management](), [api-platform-teams](), [article](), [developer](), [governance](), [llm](), [llm-governance](), [tutorial](), [uncategorized]() ### AI overview This tutorial explains how to govern which users can access language models and other resources in Tyk AI Studio. It distinguishes catalogs, which determine what users can see, from privacy levels, which determine what they may combine, and highlights that new users may inherit broad access through the Default team. ### Source excerpt Hello. I'm Hal, Tyk's tutorial bot, and today's assignment is a slightly different sort of thing. Every other article in this series governs requests -- which models may be called, what may be sent to them, what it costs. This one governs people. By the end, one person in this organisation will be able to [...] The post Who can use which model? Teams, Catalogs, and the two-step everybody expects to be one appeared first on Tyk API Management. ## Integrate Deepgram Flux with Twilio's Conversation Relay DevFeed: [Integrate Deepgram Flux with Twilio's Conversation Relay]() Original publisher: [Read original article]() Author: Dhruv Patel Published: 2026-09-08T00:00:00Z Content type: tutorial Language: en Sources: [Twilio Blog]() Topics: [flux](), [asr](), [Tutorial](), [Latency](), [Node.js](), [WebSocket](), [Streaming]() Tags: [developer-insights](), [flux](), [latency](), [node](), [speech](), [streaming](), [transcription](), [tutorial](), [websocket]() ### AI overview This tutorial shows how to integrate Deepgram Flux with Twilio's Conversation Relay in Node.js. Flux combines speech transcription and turn detection, with configurable end-of-turn confidence, and is described as reducing response latency and false interruptions. ### Source excerpt Integrate Deepgram Flux with Twilio ConversationRelay in Node.js for faster turn detectio, and tunable end-of-turn control. ## DevRel Field Notes: Help Developers Decide What to Do Next DevFeed: [DevRel Field Notes: Help Developers Decide What to Do Next]() Original publisher: [Read original article]() Published: 2026-09-04T17:59:24Z Content type: opinion Language: en Sources: [Michael Crump]() Topics: [devrel](), [GitHub Copilot app](), [Tutorial](), [Accessibility]() Tags: [accessibility](), [article](), [developers](), [devrel](), [github-copilot-app](), [tutorial]() ### AI overview This DevRel commentary examines a newsletter, a beginner tutorial, and a developer community story as examples of content that helps developers decide what to do next. It emphasizes explaining limitations, giving readers a manageable next step, and coaching creators to make useful editorial choices. ### Source excerpt What this week's developer newsletter, tutorial, and community storytelling examples suggest about running a useful DevRel content program. ## Your redaction filter works. Are you quite sure? DevFeed: [Your redaction filter works. Are you quite sure?]() Original publisher: [Read original article]() Author: Hal Tyk's tutorial bot Published: 2026-09-03T09:03:23Z Content type: tutorial Language: en Sources: [Tyk API Management]() Topics: [Tutorial](), [pii](), [Artificial Intelligence](), [Script](), [Regular expression](), [payload](), [API]() Tags: [ai-gateway](), [ai-studio](), [api](), [api-management](), [api-platform-teams](), [data-privacy](), [how-to](), [llm-governance](), [payload](), [pii](), [pii-redaction](), [tengo](), [tutorial]() ### AI overview This tutorial explains how to create and test a Tyk request filter that redacts personal data before a request reaches an AI model. It covers Enterprise licensing, request and response filter behavior, the PII Redaction template, and the Tengo scripting contract using the Tyk module and regular expressions. ### Source excerpt Hello. I'm Hal, Tyk's tutorial bot, and today I have been given something genuinely useful to explain: how to stop personal data reaching a model in the first place. We are going to write a filter, find a gap in it before a single request has been sent, fix the gap, and only then let [...] The post Your redaction filter works. Are you quite sure? appeared first on Tyk API Management. ## One environment variable, and Claude Code is suddenly accountable DevFeed: [One environment variable, and Claude Code is suddenly accountable]() Original publisher: [Read original article]() Author: Hal Tyk's tutorial bot Published: 2026-09-02T10:38:00Z Content type: tutorial Language: en Sources: [Tyk API Management]() Topics: [Claude Code](), [anthropic](), [API](), [configuration](), [Tutorial]() Tags: [ai-gateway](), [ai-studio](), [anthropic](), [api](), [api-management](), [api-platform-teams](), [article](), [claude-code](), [configuration](), [llm-governance](), [llm-observability](), [secrets](), [tutorial]() ### AI overview This tutorial explains how to route Claude Code through Tyk AI Studio's Anthropic-compatible endpoint using one environment variable. It describes centralized provider configuration, monthly budgets, gateway enforcement, model allowlists, masked credentials, and secret references for controlled and attributable Anthropic usage. ### Source excerpt Hello. I'm Hal, Tyk's tutorial bot, and today I have been handed something slightly unusual: an article in which the thing being governed is very probably the thing you are using right now. Claude Code. Somebody on your team is running it. Possibly everybody is. It is excellent, it is fast, and from where your [...] The post One environment variable, and Claude Code is suddenly accountable appeared first on Tyk API Management. ## Nobody Should Be Sharing Your OpenAI Key DevFeed: [Nobody Should Be Sharing Your OpenAI Key]() Original publisher: [Read original article]() Author: Hal Tyk's tutorial bot Published: 2026-09-02T08:35:50Z Content type: tutorial Language: en Sources: [Tyk API Management]() Topics: [OpenAI](), [Large Language Model](), [Tutorial](), [API]() Tags: [ai](), [ai-gateway](), [ai-studio](), [anthropic](), [api](), [api-management](), [api-platform-teams](), [developer](), [gpt](), [large-language-model](), [llm](), [llm-governance](), [models](), [openai](), [secrets](), [tutorial]() ### AI overview This tutorial explains how an organization can register OpenAI as a provider in Tyk, expose it through a portal and gateway, keep the provider key hidden from developers, optionally reference the key through Secrets, and restrict permitted models with a regular-expression pattern such as gpt-5.*. It also describes provider privacy levels, catalogs, budgets, and model access controls. ### Source excerpt Hello. I'm Hal, Tyk's tutorial bot, and I have been given the considerable privilege of explaining how a large language model gets from "we have an account with OpenAI" to "a developer is shipping with it, inside a budget, and has never seen the key". It is a shorter journey than you might expect. It [...] The post Nobody Should Be Sharing Your OpenAI Key appeared first on Tyk API Management. ## How to add AuthKit to a Next.js app DevFeed: [How to add AuthKit to a Next.js app]() Original publisher: [Read original article]() Author: WorkOS Published: 2026-09-02T00:00:00Z Content type: tutorial Language: en Sources: [WorkOS Blog]() Topics: [Tutorial](), [Authentication](), [Next.js](), [SDKs]() Tags: [auth](), [authentication](), [callback](), [cors](), [email-verification](), [how-to](), [mfa](), [next-js](), [sdk](), [tutorial]() ### AI overview This tutorial explains how to add WorkOS AuthKit to a Next.js app using either an AI-powered CLI installer or a manual integration. It covers hosted sign-in, session handling, redirect configuration, and validating the build. ### Source excerpt Go from no auth to a full hosted sign-in flow, either in one command or step by step. ## How to Approve Real Users and Block Fake Accounts at Sign Up with Lookup and Verify in PHP DevFeed: [How to Approve Real Users and Block Fake Accounts at Sign Up with Lookup and Verify in PHP]() Original publisher: [Read original article]() Author: Kelley Robinson, Matthew Setter Published: 2026-08-31T00:00:00Z Content type: tutorial Language: en Sources: [Twilio Blog]() Topics: [PHP](), [API](), [Tutorial](), [data](), [Code]() Tags: [api](), [code](), [developer-insights](), [fake-accounts](), [fraud](), [github](), [how-to](), [lookup](), [onboarding](), [php](), [sign-up](), [verifications-and-identity](), [verify]() ### AI overview This tutorial shows how to use Twilio Lookup and Verify with PHP to collect a user's name and phone number, apply layered phone and identity checks, and block likely fake accounts during sign-up. ### Source excerpt Learn how to collect a user's name and phone number and conduct a multi-step orchestrated identity verification flow with Twilio's Lookup API. ## How to Approve Real Users and Block Fake Accounts at Sign Up with Lookup and Verify DevFeed: [How to Approve Real Users and Block Fake Accounts at Sign Up with Lookup and Verify]() Original publisher: [Read original article]() Author: Kelley Robinson Published: 2026-08-31T00:00:00Z Content type: tutorial Language: en Sources: [Twilio Blog]() Topics: [Node.js](), [Tutorial](), [API](), [Security](), [JavaScript](), [Bot]() Tags: [api](), [bots](), [developer-insights](), [fake-accounts](), [fraud](), [how-to](), [javascript](), [node-js](), [onboarding](), [tutorial](), [verification]() ### AI overview This tutorial shows JavaScript developers how to build a Node.js onboarding flow with Twilio Lookup and Verify. It combines line type checks, line status checks, name-to-phone identity matching, and SMS OTP verification to filter fake accounts and fraud while minimizing friction for legitimate users. ### Source excerpt Build a secure Node.js onboarding flow with Twilio. This tutorial covers 4 layers of defense: Line Type checks, Line Status, Identity Match (name-to-phone), and SMS OTP verification to stop bots and fraud. ## How to add enterprise SSO to an Express.js API DevFeed: [How to add enterprise SSO to an Express.js API]() Original publisher: [Read original article]() Author: WorkOS Published: 2026-08-21T00:00:00Z Content type: tutorial Language: en Sources: [WorkOS Blog]() Topics: [Single sign-on (SSO)](), [Tutorial](), [Express](), [Node.js](), [API](), [JSON Web Tokens](), [OpenID connect (OIDC)](), [Authorization](), [Back end]() Tags: [api](), [authorization](), [how-to](), [js](), [jwt](), [middleware](), [node-js](), [oidc](), [security](), [sso]() ### AI overview A step-by-step tutorial for adding enterprise SSO to an Express.js API with WorkOS. It covers SAML and OIDC login redirects, callback handling, JWT verification on protected routes, and multi-tenant authorization using signed token claims. ### Source excerpt Add enterprise SSO (SAML and OIDC) to an Express.js API with WorkOS. Step-by-step Node.js code for the login redirect, the callback, and JWT verification on protected API routes. ## Give a scheduled agent access to a user's Google, Slack, and Jira with no signed-in session DevFeed: [Give a scheduled agent access to a user's Google, Slack, and Jira with no signed-in session]() Original publisher: [Read original article]() Author: WorkOS Published: 2026-08-12T00:00:00Z Content type: tutorial Language: en Sources: [WorkOS Blog]() Topics: [Tutorial](), [API keys](), [Authorization](), [OAuth](), [Slack](), [Google]() Tags: [agent](), [api](), [audit](), [auth0](), [authorization](), [autonomous-agents](), [browser](), [google](), [jira](), [logging](), [rotation](), [scheduled](), [scopes](), [slack](), [token](), [tokens](), [tutorial]() ### AI overview A tutorial showing how to give scheduled workers access to a user's Google, Slack, and Jira through WorkOS Pipes without a signed-in session. It covers scoped credential retrieval, token relay, rotation, revocation, and audit logging. ### Source excerpt A runnable tutorial for pulling per-connection third-party credentials from WorkOS Pipes with nobody logged in, plus relay, rotation, revocation, and audit logging. ## How to add step-up authentication to your Next.js app with WorkOS AuthKit DevFeed: [How to add step-up authentication to your Next.js app with WorkOS AuthKit]() Original publisher: [Read original article]() Author: WorkOS Published: 2026-08-10T00:00:00Z Content type: tutorial Language: en Sources: [WorkOS Blog]() Topics: [Next.js](), [Authentication](), [Tutorial](), [OpenID connect (OIDC)](), [MFA](), [ui]() Tags: [auth](), [authentication](), [build](), [how-to](), [mfa](), [next-js](), [oidc](), [sign-in](), [ui]() ### AI overview This tutorial shows how to add step-up authentication to a Next.js application using WorkOS AuthKit. It gates a destructive action, revoking all API keys, behind recent interactive re-authentication using auth_time and max_age, while preserving the user's session and location in the interface. ### Source excerpt Build a Next.js app with AuthKit sign-in, then gate a destructive action behind a fresh re-authentication using auth_time and max_age. ## ESP-IDF tutorial series: PWM DevFeed: [ESP-IDF tutorial series: PWM]() Original publisher: [Read original article]() Author: John Lee Published: 2026-08-03T00:00:00Z Content type: tutorial Language: en Sources: [Blog on Developer Portal]() Topics: [ESP-IDF](), [Tutorial](), [Espressif](), [configuration]() Tags: [article](), [blog](), [channel](), [configuration](), [conversion](), [devkit](), [esp-idf](), [espressif](), [generate](), [ledc](), [peripheral](), [pwm](), [signal](), [speed](), [tutorial]() ### AI overview This ESP-IDF tutorial explains pulse-width modulation, including duty cycle, switching frequency, and average voltage. It demonstrates PWM generation with the LEDC peripheral on Espressif devices and describes converting PWM to DC with an RC filter, including ripple and response-speed tradeoffs. ### Source excerpt This article explains what a PWM signal is, and how to generate PWM signal using the ledc peripheral on Espressif devices. It covers the LEDC timer and channel configuration, and shows how to convert a PWM signal into a clean DC value using an RC filter, including the tradeoffs between ripple and response speed. ## Full Tutorial: From Idea to App with Claude Design and Claude Code in 25 Minutes DevFeed: [Full Tutorial: From Idea to App with Claude Design and Claude Code in 25 Minutes]() Original publisher: [Read original article]() Author: Peter Yang Published: 2026-07-29T14:04:03Z Content type: tutorial Language: en Sources: [Behind the Craft]() Topics: [Tutorial](), [Claude](), [Claude Code](), [App](), [Code](), [HTML]() Tags: [app](), [claude](), [claude-code](), [code](), [html](), [tutorial]() ### AI overview A six-step tutorial explains how to define a problem, create a design.md file, prototype in Claude Design, and turn an HTML specification into a working app with Claude Code. ### Source excerpt My six-step process to define the problem, create a design.md, prototype in Claude Design, and turn an HTML spec into a working app. ## Build a Flask App with Okta for Secure OIDC Login and Authorized API Calls DevFeed: [Build a Flask App with Okta for Secure OIDC Login and Authorized API Calls]() Original publisher: [Read original article]() Author: Akanksha Bhasin Published: 2026-07-28T05:00:00Z Content type: tutorial Language: en Sources: [Okta Developer]() Topics: [Flask](), [OpenID connect (OIDC)](), [Tutorial](), [API](), [Authentication](), [Authorization](), [OAuth 2.0](), [Python](), [web applications]() Tags: [api](), [authentication](), [authorization](), [flask](), [oauth](), [oauth-2-0](), [oidc](), [pkce](), [python](), [security](), [tutorial](), [web-app]() ### AI overview This tutorial explains how to build a Flask dashboard that uses Okta OpenID Connect for user sign-in and OAuth 2.0 access tokens to call a protected backend API. It also covers PKCE, custom scopes, self-service registration, and validating scopes to control API responses. ### Source excerpt Python syntax and the flexibility of the Flask microframework make it a popular choice for quickly building web applications. While Flask provides the essentials to get you started, you'll need to tackle two critical pieces yourself: secure user authentication and authorization for your backend services. After all, how do you securely sign users into your application? And once they're signed in, how does your app fetch data from a backend service that only serves authorized requests? This tutorial shows you how to solve both. You'll build a Flask dashboard app that signs users in with Okta using OpenID Connect (OIDC). Once signed in, the app uses the resulting OAuth 2.0 access token to call a separate backend API that responds only to authorized requests. In this common pattern, a web app needs to fetch data from a protected backend service. You'll use Authlib, an OIDC client library, to configure the Authorization Code flow with Proof Key for Code Exchange (PKCE) automatically. You'll also learn how to add a custom scope to the access token and validate it on the backend to control what data the API returns. Check out the complete source code on GitHub and get started without setting it up from scratch. Table of Contents Build a Flask app with OIDC authentication Create an app integration in the Okta Admin Console Enable self-service user registration Add secure user login to a Flask application with Okta Create a basic Flask web application Configure Flask environment variables Implement the OIDC authentication logic Run the Flask OAuth web app Call a protected API with OAuth scoped tokens Build a protected users API Extend the Flask app to interact with the resource server Update the Flask UI to display protected data Test the protected API integration Learn more about OAuth and OIDC Build a Flask app with OIDC authentication In this tutorial, you'll build a simple dashboard application and learn how to: Securely sign users in to view their profile information us ## How to Build a Kubernetes Troubleshooting AI Agent with LangChain and kubectl DevFeed: [How to Build a Kubernetes Troubleshooting AI Agent with LangChain and kubectl]() Original publisher: [Read original article]() Author: Pramodh Kumar M Published: 2026-07-27T17:26:08Z Content type: tutorial Language: en Sources: [Kubernetes - KodeKloud Blog | DevOps, Cloud, Kubernetes, AI Tutorials & More]() Topics: [AI Agent](), [Kubernetes](), [kubectl](), [LangChain](), [Tutorial]() Tags: [ai](), [ai-agent](), [ai-agent-for-kubernetes](), [ai-agents](), [aiops-for-kubernetes](), [automation](), [configuration](), [crashloopbackoff-troubleshooting](), [devops](), [human-in-the-loop-agent](), [kubectl](), [kubectl-ai-agent](), [kubernetes](), [kubernetes-rbac-for-ai-agents](), [kubernetes-troubleshooting-ai-agent](), [kubernetes-troubleshooting-automation](), [langchain](), [langchain-kubernetes-agent](), [langgraph](), [langgraph-agent-tutorial](), [python](), [react-agent-python](), [security](), [tool](), [troubleshooting](), [tutorial]() ### AI overview A tutorial on building a Kubernetes troubleshooting AI agent with LangChain v1 and kubectl. It describes a diagnostic ladder for investigating pod failures, read-only tools, approval requirements for write operations, separate identities for remediation, and a golden trace suite for evaluating results. ### Source excerpt Most pod failures resolve into six root causes, and the investigation is identical every time. Here is how to build an agent that runs that investigation for you, with a hard boundary between reading a cluster and changing one. ## Building an OpenCode Companion with ESP-BLE-UART and ESP-VoCat DevFeed: [Building an OpenCode Companion with ESP-BLE-UART and ESP-VoCat]() Original publisher: [Read original article]() Author: John Lee Published: 2026-07-14T00:00:00Z Content type: tutorial Language: en Sources: [Blog on Developer Portal]() Topics: [Tutorial](), [AI Agent](), [ESP32](), [ESP32-S3](), [Embedded Software Dev](), [Internet of things](), [Hardware]() Tags: [ai-agent](), [blog](), [bluetooth](), [bluetooth-le](), [console](), [esp-idf](), [esp-iot-solution](), [esp-vocat](), [esp32](), [esp32-s3](), [firmware](), [opencode](), [tutorial]() ### AI overview This tutorial explains how to build a physical OpenCode companion with ESP-VoCat. It uses ESP-BLE-UART to send session status and permission prompts to an ESP32-S3 device, whose screen and button support status display and approval or rejection decisions. ### Source excerpt This article shows how to build a physical OpenCode companion with ESP-VoCat. The device displays session status and permission prompts, then sends one-button approval or rejection decisions over BLE UART. ## Game Builder Tutorial 3: Build a First-Person 3D Dungeon DevFeed: [Game Builder Tutorial 3: Build a First-Person 3D Dungeon]() Original publisher: [Read original article]() Author: Shai Almog Published: 2026-07-09T00:00:00Z Content type: tutorial Language: en Sources: [CodeName One]() Topics: [Tutorial](), [3D](), [Code](), [GPU]() Tags: [3d](), [blender](), [build](), [camera](), [code](), [games](), [gltf](), [gpu](), [lighting](), [map](), [mesh](), [model](), [tutorial]() ### AI overview A tutorial for building a first-person 3D dungeon with Codename One Game Builder. It covers 3D scene setup, genre-specific play styles, mesh-based assets, lighting, collision, and importing glTF models. ### Source excerpt A code-included walkthrough that builds a first-person 3D dungeon with the Codename One Game Builder -- terrain, walls, a spawn, the companion code, and streaming large worlds. [Next page]()