Posts tagged typescript

B4.run 0.13: A sandbox per thread

Learn what 0.13 adds for threads that need their own environment: per-thread images and permissions, staged workspaces and HTTP reads.

B4.run 0.9 to 0.12: The answer the user sees

Learn what 0.9 through 0.12 changed about the final answer: response schemas, an after hook, returnDirect tools and streamed tool arguments.

Essay · 23 min

Build a code-fixing agent you can read

Follow a B4.run agent from a failing CLI test through a Docker workspace, independent checks, and approval of the exact change.

B4.run 0.8: The framework around the agent

Learn what 0.5 through 0.8 added around the agent: evals, tool permissions, sandboxes, delegation, typed memory, AG-UI clients and production builds.

Essay · 9 min

B4.run at the edge: The Hono target

B4.run's opt-in Hono target emits a Node-free Cloudflare Workers entry with request-scoped Postgres stores and a tested workerd subset.

Essay · 7 min

The App Router for AI Agents

Learn how B4.run uses file-system routes, typed tools, planning, skills and subagents to organize a LangGraph.js agent application.