Engineering notes from the field.
Essays and field notes on AI, software engineering, design, and the craft of building product teams that ship. Written by the engineers doing the work.
Anthropic Ships Fable 5 GA and Mythos 5 to Glasswing Partners
On June 9, 2026 Anthropic shipped Fable 5 to GA on AWS, GCP, Azure and Mythos 5 in limited Glasswing preview at $10/$50 per million tokens.
Anthropic Ships Okta Enterprise Auth for Claude's 7 MCP Connectors
On June 18, 2026, Anthropic launched Okta-backed enterprise auth for Claude's MCP connectors, replacing OAuth consent with a silent ID-JAG token exchange.
OpenCode Hits 160K Stars, 7.5M Devs: Model-Agnostic CLI Wins
OpenCode reached 160K stars and 7.5M monthly devs by June 2026 — MIT-licensed, 75+ providers, terminal-native, air-gap-capable. The lock-in question flipped.
OpenAI Previews GPT-5.6 Sol in Restricted ~20-Partner Rollout
OpenAI previewed GPT-5.6 Sol on June 26 to about 20 US-government-approved partners, setting a new state of the art on Terminal-Bench 2.1 for coding.
GitHub Copilot Goes Usage-Based: AI Credits Replace Flat Plans
On June 1, 2026 GitHub Copilot moved every plan to usage-based billing — AI Credits meter input, output, and cached tokens at API rates.
OpenAI Acquires Ona (Gitpod) to Give Codex Persistent Cloud Sandboxes
On June 11, 2026, OpenAI acquired Ona (formerly Gitpod GmbH) to give Codex — now 5M weekly developers — persistent cloud sandboxes for unattended runs.