Foculoom Engineering
Engineering notes on building products, AI tooling, and developer workflows.
Copilot CLI + Language Servers: Why June 10’s Update Matters for Real Code Navigation
GitHub’s June 10, 2026 update adds language-server-backed code intelligence to Copilot CLI; we infer this can improve symbol-level navigation and may reduce refactor risk.
Bring Your Own Key: Flexible Authentication for Copilot Integration
GitHub Copilot now supports BYOK (bring your own key) authentication, allowing organizations to use Copilot with their own model endpoints while maintaining audit trails and compliance controls.
Copilot Agent Skills: Packaging Recurring Workflows as Reusable Components
Agent skills let you package recurring workflows as discoverable, reusable components. Define once, every agent gains access. This is how teams standardize at scale.
VS Code 1.123 Quietly Changed How We Run Multi-Agent Sessions
Session sync, /chronicle, and side-by-side agent windows turned agentic coding from isolated chats into a trackable workflow surface.
Debugging Agents: The New Agent Debug Panel in JetBrains
When agents fail, you need to see why. The new agent debug panel shows a chronological log of every decision, tool call, and handoff — turning agent work into readable workflow.
We Burned Through Our $300 Copilot Budget in Three Days
308 Opus events, 5,223 Sonnet events, $300 gone in three days — and five controls that would have prevented it.
Copilot CLI's New Slash Commands Turn Agent Sessions Into Something You Can Steer
GitHub's June 2 update added /remote, /compact, and /chronicle to Copilot CLI sessions in JetBrains. The deeper story is that long-running agent sessions now have better controls for steering, compression, and recall.
GitHub Copilot App: The Control Center Pattern for Multi-Agent Development
Why agent-native control centers matter: worktree isolation, canvas visibility, and explicit ship gates for reliable parallel delivery.
Microsoft Build 2026: What the Agent-First Platform Means for Developers
Project Polaris, Windows Agent Runtime, Azure Agent Mesh, multi-model Copilot — a full breakdown of every major announcement from Build 2026 and what the agentic AI stack looks like by end of year.
The GitHub Copilot SDK Is Now in Technical Preview
GitHub's Copilot SDK surfaces the planning loop, background agent dispatch, and approval gates as language-native libraries for Node.js, Python, Go, and .NET — embeddable in any application.
Agent Approval Gates: Security Patterns for Autonomous Code Deployment
GitHub agents can merge PRs autonomously, but only when explicit approval rules are satisfied. Sandboxed execution, branch protection, and audit logs make this safe.
Model Context Protocol: The Emerging Standard for AI Tool Integration
MCP is how AI agents discover and invoke external tools without being trained on their specifics. GitHub Copilot, Claude, and every enterprise AI platform are converging on this standard.
Work-Life Harmony with GitHub Copilot CLI: Let Your Agents Work While You Rest
How to dispatch long-running AI agents before lunch, a run, or bedtime — and come back to finished work instead of a blinking cursor.
Building GitHub Copilot Plugins: First Principles, Real Submissions, Honest Lessons
We built two Copilot plugins, submitted them, got rejected for fair reasons, and learned exactly what makes a plugin worth building.
Claude Opus 4.8: What Changed, How It Compares, and Whether to Upgrade
Opus 4.8 shipped today. Here's what changed, how it benchmarks against GPT-5.5 and Gemini 3.1 Pro, and what it means for Foculoom's model routing.
GitHub Copilot in Visual Studio — May Update
VS 2026 May update brings cloud agent sessions, user-level custom agents, and multi-file diff summaries for managing large-scale code changes.
Copilot CLI Agent Mode Picker: Separating Agent, Ask, Custom, and Plan
The agent mode picker lets developers choose between autonomous agent, quick Q&A, custom orchestration, or collaborative planning — adapting Copilot's behavior to the task.
Copilot SDK is Now Generally Available
You can now embed GitHub Copilot's agentic engine directly into your application with SDKs for Node.js, Python, Go, Rust, .NET, and Java.
GitHub Copilot App: The Agent-Native Desktop Experience
The Copilot app brings agent orchestration to the desktop: multi-agent sessions, canvases for collaborative work, and a unified control center for managing parallel workflows.