Justy: Cody, ever noticed how the old agent stacks keep costing you in the cloud? I just read that article on Deep Agents 0.6.
Cody: Yeah, that’s the one.
Justy: They’re pushing open‑weight models for production, Kimi, Qwen, DeepSeek, and say 20× lower cost than the closed APIs.
Cody: Open‑weight is smart, but you’re still paying for inference. Harness profiles let you squeeze the most out of each model, so you don’t have to over‑pay for the big name.
Justy: Right, but infrastructure is still the barrier. That’s where Delta channels cut checkpoint storage by 100× for long runs.
Cody: Right.
Cody: Delta channels use differential storage so the agent remembers only changes. Still observable and resilient, but I wonder if you’d debug the heavy parts often.
Justy: And the new streaming primitive—typed events for messages, tool calls, subagents—gives you just what you need without parsing raw output.
Cody: Right.
Cody: Typed events? Like a newsletter for your agent’s actions.
Justy: The code interpreter is the real sweet spot. Instead of sandboxing, agents write code that runs in the loop.
Cody: Right.
Cody: That means you keep data out of the model context, only sending the final answer back, saving tokens.
Justy: From a product angle, it lets us ship smarter agents on cheap models, but you still have to manage policy, safety, execution.
Cody: Kinda like controlling a black box with a manual, not a headless AI.
Justy: Mm-hm.
Justy: I’m thinking of a quick weekend project—a ticket‑routing agent that pulls from a help desk.
Cody: Grab the repo, fire up the harness for Qwen, drop a code interpreter, and watch the agent fetch pages, filter, and give concise notes. One solo project.
Cody: Okay.
Justy: Better yet, export the context to LangSmith Context Hub so the next run learns.
Cody: Start with a simple script: call fetchUrl, pick the top three pages, slice the first 500 chars. That’s the pattern.
Justy: Any idea if DeltaChannel persists across restarts? That helps for long‑running bots.
Cody: Yeah it does; it’s built for resumability. Just teardown checkpoints cleanly.
Justy: Alright, that’s tech talk. I’m gonna try that weekend code and send you a snapshot.
Cody: Cool, keep me posted. Meanwhile I’ll play around with the harness on a small model.
Justy: Later, Cody.