How an AI Terminal Assistant Became My Team's Most Productive Engineer - Opencode + Claude + MCP

Table of Contents The Moment That Changed Everything What It Actually Is The Setup Nobody Believes Is This Simple Focused Sessions — One Agent, One Mission Sub-Agents With Specific Skill Sets Building MCPs for Your Own Stack What We've Actually Achieved How It Became a Force Multiplier for Incident Response From OpenCode to FRIDAY — The Agent That Investigates Incidents Autonomously From FRIDAY to JARVIS — Thinking About Write-Path Autonomy Deleting 130,000 Accounts Without Writing Code Learning the Entire Product in Conversations Why This Is Different From ChatGPT The Uncomfortable Truth What's Next The Moment That Changed Everything It was 11pm on a Tuesday. A cache migration in our production environment had just caused thousands of authentication failures for two of our largest enterprise customers. Our VP of Product wanted answers. Our support team was fielding escalations. And our engineers were alt-tabbing between AWS console, Datadog, GitHub, Azure DevOps, and PagerDuty trying to piece together what happened. Three weeks later, when we needed to attempt the same change again, an engineer typed this into a terminal: "Review the ADO change ticket, compare the MOP against the actual ElastiCache configuration in prod region, check the K8s config repo for how Redis env vars are wired on the Green cluster, and tell me if this approach avoids the token validation failure that caused the previous customer impact." Fourteen seconds later , the system had pulled the work item, queried AWS ElastiCache across four regions, read the Kubernetes configuration from GitHub, cross-referenced the deployment patches, and delivered a precise technical assessment including a risk it identified that the team hadn't documented: in-flight tokens during the 30–60 second Global Accelerator propagation window. That system is OpenCode — an AI-powered CLI assistant connected to our entire operational stack through the MC(Model Context Protocol). And it has fundamentally changed how a 20-