DevOps · Troubleshooting
Gemini 4 Argon API: Structured JSON Output, Schema Errors, 400s
Debug Gemini 4 Argon structured JSON requests, unsupported schema features, 400 errors and application-side validation with concrete examples.
Technical Articles
Articles on technical topics, common issues and troubleshooting. With examples that can be applied to your work.
Articles
DevOps · Troubleshooting
GitHub Agentic Workflows: Setup, Compilation and Common Issues
Set up GitHub Agentic Workflows, compile gh-aw Markdown, diagnose lock-file and permission failures, and inspect safe-output boundaries.
DevOps · Troubleshooting
Node.js 26 LTS: Fix Upgrade, npm Compatibility and GitHub Actions Errors
Upgrade to Node.js 26 LTS and diagnose npm engines, native addons, GitHub Actions, Docker and production runtime differences.
DevOps · Troubleshooting
Webhook Automation: Verify Events, Handle Retries and Prevent Duplicate Processing
Verify signed email webhooks, preserve raw request bodies, handle retries, and stop duplicate business actions using durable idempotency.
DevOps · Explainer
Agent Skills and SKILL.md: Create, Validate, and Debug Skills in Claude Code, Codex, and Cursor
Create and validate a real SKILL.md example, test skill discovery in Claude Code, Codex and Cursor, and debug activation and security boundaries.
DevOps · Troubleshooting
Expo Go SDK 58 Not Working? Fix Version Mismatch, QR Codes, and Development Builds
Diagnose Expo Go SDK 58 version mismatches, QR and Metro connection errors, and native-module limitations on Android, iOS Simulator and iPhone.
DevOps · Troubleshooting
Expo SDK 58 Upgrade Errors: Fix Dependencies, TypeScript, and EAS Build Failures
Fix Expo SDK 58 upgrade failures in npm dependencies, TypeScript, native projects and EAS Build with practical diagnostics and safe recovery steps.
DevOps · Explainer
A2A Agent Cards: JSON Structure, Discovery and Authentication
Inspect A2A Agent Cards for correct v1.0 JSON, discovery URLs, protocol bindings, and authentication. Includes local validation and troubleshooting.
Developer · Explainer
OpenAI Agents SDK: Handoffs, Guardrails and Tracing in One Workflow
See how OpenAI Agents SDK handoffs, guardrails, and traces behave in a support workflow, with Python examples, access controls, and failure tests.
Security · Explainer
OWASP Top 10 for LLM Applications 2026: What Changed for Developers
Compare OWASP LLM Top 10 editions for 2025 and 2026, including category renames, ranking changes, and actionable developer security checks.
Security · Explainer
AI Agent Security: Stop Prompt Injection From Turning Into Tool Abuse
Prevent prompt injection from becoming data leakage or unauthorized actions by separating trust boundaries, shrinking tool permissions, and enforcing application policy.
Security · Explainer
MCP Authentication and OAuth: Debug 401, 403, Discovery and Token Failures
Trace MCP protected-resource metadata, OAuth discovery, callback failures, and token validation to isolate why a protected tool call is rejected.
DevOps · Explainer
MCP Inspector: Debug Connection Failures and Tool Calls Without Guessing
Use MCP Inspector to isolate process, transport, discovery, schema, and tool-execution failures before blaming the model or your full application.
Developer · Troubleshooting
429 Too Many Requests: How to Fix API Rate Limits and Handle Retries
HTTP 429 Too Many Requests? Diagnose API quotas and Retry-After headers, fix burst traffic, and implement safe backoff and retries with tested Node.js examples.
DevOps · Troubleshooting
GitHub API Rate Limit Exceeded: Understanding 403, 429 and Reset Headers
GitHub API returning 403 or 429? Identify primary and secondary rate limits, interpret reset headers, and fix throttled integrations without unsafe retries.
SEO · Troubleshooting
Why Valid JSON-LD Still Doesn't Show a Google Rich Result
Valid JSON-LD but no rich result? Diagnose Google feature eligibility, deployed markup, indexing, canonicals, and search appearance with worked examples.
Developer · Guide
What Is a Webhook? Webhook vs API, Signatures, Retries, and Delivery Failures
Learn how webhooks differ from API polling, verify signed deliveries in Node.js, handle duplicate events, retries and missing notifications.
Security · Guide
What Is an API Key? How API Keys Work, Restrictions, Rotation, and Common Errors
Understand how API keys work in real requests, where to keep them, restrictions, 401/403/429 errors, secure rotation and when OAuth is more appropriate.
DevOps · Explainer
GitHub Actions Concurrency Controls for Parallel Jobs and Deployments
Understand needs, max-parallel and concurrency groups in GitHub Actions, with runnable workflow examples, cancellations, queues and deployment safeguards.
Developer · Guide
JSON Files Explained Through Real Examples and Parsing Errors
Understand JSON files through valid and invalid examples, types, escaping, nested data, parser errors, numeric precision and practical debugging.
DevOps · Guide
Terraform with GitHub Actions for Pull Request Checks and Controlled Deployments
Learn how to validate Terraform pull requests and run controlled deployments with GitHub Actions, safe plans, approvals, state and cloud credentials.
DevOps · Comparison
External Secrets Operator vs Kubernetes Secrets: Storage, Rotation, and Access
Compare native Kubernetes Secrets with External Secrets Operator across etcd storage, source of truth, rotation, RBAC, provider access, failure modes, and CSI alternatives.
SEO · Troubleshooting
Why a Valid XML Sitemap Does Not Guarantee That Its URLs Will Be Indexed
A valid or successfully processed sitemap can help Google discover URLs, but it does not guarantee crawling or indexing. Diagnose sitemap status, discovery, fetchability, noindex, canonicals, redirects, and Search Console indexing reasons.
SEO · Troubleshooting
How to Diagnose 'Duplicate Without User-Selected Canonical' in Google Search Console
Use Search Console's Google-selected canonical, duplicate relationship, redirects, canonical tags, sitemap entries, and internal links to decide whether this status needs a fix or no action.
SEO · Troubleshooting
Why a URL Can Be Allowed by robots.txt and Still Not Be Indexed
An Allowed robots.txt result only answers whether a crawler may request the URL. Diagnose discovery, fetchability, noindex, canonicalization, duplicates, soft 404s, and Google's indexing decision separately.
Developer · Troubleshooting
Debugging CORS Preflight Failures Caused by Access-Control-Allow-Headers
Trace a CORS preflight header mismatch from the browser's OPTIONS request to the server response, including JSON Content-Type, Authorization, wildcards, credentials, and common false fixes.
Developer · Troubleshooting
Multipart FormData Boundary Problems: How to Diagnose Broken Upload Requests
Multipart requests depend on one boundary value appearing in both the Content-Type header and body. Learn how missing, mismatched and malformed boundaries break FormData requests.
Developer · Guide
Nested JSON to FormData: Arrays, Objects, Brackets and What the Server Actually Receives
Nested JSON does not map to FormData automatically. See how arrays, objects, repeated keys, bracket notation and JSON-stringified fields change what a backend receives.
Developer · Troubleshooting
415 Unsupported Media Type After Switching from JSON to FormData
A 415 after switching from JSON to FormData usually means the endpoint and request media type no longer agree. Diagnose the body before changing headers.