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I built an Elastic MCP server to help plan my commute to and from home, work, and events in my calendar. Reduces my traffic time and eases the daily commute: github.com/justincastilla/ki…
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Just wrapped up an amazing day at @WeAreDevs with a Lego Salon collab event with @floxdevelopment @apify and @runpod . So many people came out to have fun after the conference building Legos, chatting up what they saw, and cheering on our 3 winning groups. So much fun, everyone!
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Hey all, @floxdevelopment , @runpod , and @apify will be running an afterhours meetup at the @WeAreDevs venue on 9/24 right after the booth crawl. We'll be having some refreshments, networking, and an epic Lego building competition! See you there!
luma.com/apify-qplc
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Wrapping @DevOpsDaysPDX 2026! TL;DR: the platform work you've already done is what saves you when AI hits your pipeline.
Best talk for me: Daniel Sauble's Nix ignite. Containers fix reproducibility yet wreck DX. Nix fixes both, down to glibc.
Also got to meet the Flox folx IRL!
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Some shots of Nick, Daniel, and I at our booth at @DevOpsDaysPDX , so great to chat with the team and get a brain dump from the true talent!
#DevOpsDays #DevOpsDaysPDX
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Most important for me: Daniel Sauble's talk on reproducibility vs DX. Containers fix one and wreck the other. venvs fix DX until polyglot apps and system deps show up. Nix does both, down to glibc. Best pitch for Nix I've heard in a while. Great to meet the Flox folx IRL!
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Beyond the AI sabre-rattling: IaC and supply chain security (talk to me about this), database branching and zero-downtime migrations (please don't), a rare four-distro Linux panel, and a hot take on config management via OpenVox.
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Clear thread this year: the platform work you've already done is mostly what saves you when AI shows up in the pipeline. And when it fails, the failure modes are stranger and costlier than anything in your runbooks.
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Justin Castilla retweeted
The Go podcast let us hijack an episode to talk about Nix n Flox. 😅 (❤️ @sudomateo & @skriptble)
Dug a bit into..
Why Nix can feel hard. Why there's 5+ paths for every goal. Bringing Nix to work. And what we are cooking at @floxdevelopment
#NixCon very soon ;) #NixOS
Ever wonder how NixOS works? In this week's episode of Fallthrough @sudomateo and @skriptble are joined by @ronefroni and @jambay to talk about NixOS and Flox. They get into what NixOS exists to solve and how Flox helps with that mission.
fallthrough.fm/86
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Justin Castilla retweeted
@jambay demo'd the new @floxdevelopment Determinstic Agentic Stacks side by side with our friends at @inngest , @nebiusai , and @MiniMax_AI.
Shoutout to our friends at @UnikraftCloud who swung by and are geniuses behind some incredible MicroVM speed! #nixos
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Hey everyone! I'll be presenting a workshop on @LangChain 's Deep Agents agentic harness with @elastic agent builder and @tavilyai this friday at the Women in Data Science Conference. Register for the event here:
widspugetsound.org
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We'll build out an app to gather framework sentiment anlysis, repository liveliness metrics, and overall evaluation scores to offer up a "developer advocate" service to those wanting to vet the best tech out there.
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Justin Castilla retweeted
Start today → docs.langchain.com/oss/pytho…
deepagents-cli is quietly becoming the best place to start coding with open weight models.
we've been investing heavily in making it a harness that's truly model-agnostic, without compromising performance!
different models perform best with different harnesses -- prompts, middleware, settings. our recent profiles API (below) lets you bundle all of that per model, so Kimi, Qwen, GLM, etc. can drive the agent loop just as well as the closed frontier.
more info on profiles nitter.net/Vtrivedy10/status/2049…
other recent wins worth highlighting:
- /agents - swap agent profiles mid-session (coding agent/content writer/custom)
- /model - fuzzy switcher w/ live status; OpenRouter, LiteLLM, Baseten, hosted Ollama all built-in
- headless mode w/ --json + --max-turns for scripting
- --acp to run as an ACP server
- /skill:name skills
- MCP w/ OAuth
full docs and quickstart ⬇️
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@CastillaCodes has a Spotlight Session at Nebraska.Code() this July.
Find 'Build your own Developer Advocate with DeepAgent!' here:
nebraskacode.amegala.com/
#DeepAgent #Frameworks #Repositories #LangChain #SubAgents #AI #GitHub #Opensource @elastic @Fiserv @omahanehr @StreckLLC @osaic_inc #AI @Centene @KawasakiUSA @ConagraBrands #Tech
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@CastillaCodes has a Spotlight Session at Nebraska.Code() this July.
Find 'Tracking Longterm Health with a Sympathetic Voice - empowering Agentic AI to actually listen' here: nebraskacode.amegala.com/
#AgenticAI #MCP #LLMs #Midwest #Python #API @LiveWellNE @UnitedHealthGrp @rightathomeUS @neiaredcross @westcorphealth @NRCHealth @OmahaPython @Bryan_Health @MercyOne_Iowa
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Justin Castilla retweeted
A competent RAG pipeline with a billion parameters? It’s no longer just a pipe dream.
The recent release of Gemma and Qwen models give developers access to models as small as under 1B parameters that can run on not just your computer, but edge devices.
Combine them with Jina AI’s v5 text embedding models, and you can have a competent RAG pipeline for around 1B parameters, or an even better one for only 5-10B parameters.
What’s even better is that these Gemma and Qwen models are multimodal, so they can understand images as well as text.
You can combine these with Elasticsearch (running on your machine or in the cloud) and you’ll have an efficient RAG pipeline at a fraction of the compute you used to need.
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Had an amazing last few days working with the community! On Thursday I had the opportunity to run a workshop with SeattleJS covering LangChain's Deep Agents agentic harness with Tavily and Elastic's Agent Builder to build out a powerful technology research application.
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Then it was northward to the Vancouver Cloud Summit to hang out at our booth and act as judge for the Elastic-sponsored Hackathon. It's truly amazing what an enthusiastic and empowered group can create in such little time!
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Later this week I'll be at the Women in Data Science Puget Sound conference with a quick workshop in Python for Deep Agents. It's open to all and has a fantastic lineup of talks and workshops. I love conference season!
widspugetsound.org/
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