Buglyst Blog
Learn to debug under pressure.
Playbooks for fast pattern recognition, guides for the full investigation, and articles for the engineering judgment around the edges.
17 playbooks · 509 guides · 95 articles · 12 linked practice labs ·skip to practice
Fast pattern recognition for the production failures engineers see most often.
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Structured investigations for the failure modes engineers meet in real systems.
GraphQL Authentication Resolver Not Firing – Root Cause Debugging
A practical guide to debugging GraphQL authentication resolvers that silently fail, return null, or throw confusing errors.
SAML SSO Login Fails After IdP Metadata Update
A complete debugging guide for SAML SSO login failures, covering certificate rotation, assertion validation, and clock skew issues.
OpenID Connect ID Token Validation Failure Debugging
A practical guide to diagnosing and fixing OpenID Connect ID token validation failures, covering signature verification, expiration, issuer mismatch, and audience checks.
Azure AD Authentication Token Error — A Practical Debugging Guide
A hands-on guide to diagnosing and fixing Azure AD token errors like AADSTS700016, 500208, and 65001. Covers common causes, quick diagnosis steps, and real-world fix patterns.
Session Fixation Vulnerability Debug: Why Regenerating Session ID Isn't Enough
A deep debugging guide for session fixation attacks, covering real-world scenarios where session regeneration alone fails, and how to audit your auth flow.
Debugging JWT Expired Token Errors Caused by Clock Skew
When JWT validation fails due to clock differences between issuing and verifying servers, the error messages are misleading. This guide shows how to diagnose and fix clock-skew-induced token expiration.
Long-form thinking on debugging habits, observability, and the systems around the bug.