Code generation has a free, instant, perfect oracle. Prose has none. Here is two months of narration-quality fixes in PaperCast, why each one was locally right and globally insufficient, and what we are changing.
Amazon’s Q1 2026 beat was strong on revenue, AWS, and operating income, but EPS was materially helped by Anthropic gains and capex remains the key debate.
MCP standardizes how tools and context are exposed to models, but reliable agent systems still depend on orchestration, policy, durability, observability, and approval-driven runtime design.
A practical reference blueprint for an agent harness, grounded in the live harness-engineering repo and updated with a real blueprint export instead of an imaginary architecture diagram.
Why agent performance engineering lives in the harness, with a real repo update that adds per-step timing and workload estimates to trace summaries and run summaries.
A practical look at what security actually means in an agent harness after adding a checked-in policy config, provider env handling, and verification surfaces to the live demo repo.
A practical look at small multi-agent systems after adding explicit planner→executor→reviewer handoffs to the live harness-engineering demo.
A practical look at harness-level sandboxing and isolation after adding explicit action categories, policy checks, and write-path enforcement to the live harness-engineering demo.
A practical look at tracing, operator-facing observability, and trace-aware evals in the live harness-engineering demo after adding persisted trace summaries and lightweight eval fixtures.
A practical look at human-in-the-loop design in the live harness-engineering demo: approval as explicit workflow state, not a chat courtesy, plus a new pending-action inspection surface for operators.
