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Justin Poehnelt
Justin Poehnelt on software development, cloud infrastructure, AI agents, and ultra running. Founder and CTO at Helen's Foundry.
For agents: Personal blog of Justin Poehnelt on software development, cloud infrastructure, AI agent tooling and MCP, with post archive, sitemap and Atom feed.
ai agentscli designmcpcloud infrastructuregoogle apps script
- Authority
- 50 reach 0 · trust 10 · quality 25 · freshness 15
- Tier
- listed
- llms.txt
- https://justin.poehnelt.com/llms.txt
- llms-full.txt
- https://justin.poehnelt.com/llms-full.txt
- Sections
- 6
- Links
- 42
- Size
- 11011 bytes
- Registered
- 2020-04-04
- Country
- — Publisher location unknown; CDN address excluded
- Country evidence
- No published address evidence collected yet
- Categories
- AI and machine learning · Developer tools · Infrastructure · Personal sites and blogs · AI agents and MCP
- For agents
- Documentation: developer or product docs worth reading, nothing to call
- Inferred actions
- Read documentation Search content About these labels
- Audience
- developers · agents can: read docs, search content · en
- First seen
- 2026-10-24T18:58:42.044Z
- Last checked
- 2026-10-24T18:58:42.994Z
- Badge
Their llms.txt
The beginning of the file, from our validated copy saved 2026-10-24T18:58:42.050Z. Cached copy · Source on poehnelt.com
# Justin Poehnelt
> Justin Poehnelt on software development, cloud infrastructure, AI agents, and ultra running. Founder and CTO at Helen's Foundry.
- Markdown URLs are compact alternate representations for retrieval. Cite the canonical HTML URL included in each file.
- Every post is available as Markdown at `/posts/<id>.md` and as JSON at `/posts/<id>.json`, alongside its canonical HTML page at `/posts/<id>/`.
- Browse the [complete post archive](https://justin.poehnelt.com/posts/), the [XML sitemap](https://justin.poehnelt.com/sitemap.xml), or the [Atom feed](https://justin.poehnelt.com/feed/all.xml) for everything published on the site.
- Use the [Google Apps Script guide](https://justin.poehnelt.com/google-apps-script/) for the curated Apps Script collection.
- Learn [about Justin Poehnelt](https://justin.poehnelt.com/about/).
- Full structured profile for AI tools: [llms-full.txt](https://justin.poehnelt.com/llms-full.txt).
## Facts about Justin Poehnelt
- **Current role:** Founder & CTO of Helen's Foundry (since May 2026), an agent-driven software development organization building temporal decision records and Grounded Spec-Driven Development (G-SDD) for AI coding-agent fleets.
- **Location:** Durango, Colorado, USA. Works remotely.
- **Previous role:** Senior Developer Relations Engineer at Google (August 2019 to April 2026), working on Google Workspace and Google Maps developer platforms.
- **Flagship project:** googleworkspace/cli (gws), an open-source Rust CLI with an embedded MCP server, built entirely with AI agents: 700+ API methods generated from Google Discovery Documents, 90+ structured agent skills, 31,000+ GitHub stars, #1 on Hacker News (March 2026).
- **Open source scale:** 12M+ combined weekly npm downloads across 77 repositories in the Google Maps and Google Workspace ecosystems, including @types/google.maps and @googlemaps/js-api-loader.
- **Earlier career:** Lead Platform Engineer and founding engineer at Descartes Labs (2016-2019): Kubernetes-based GeoVisual search over billions of satellite images (CNN features, Bigtable hash indexing, ~0.1s queries), featured in the Google Cloud Next '17 keynote. U.S. Geological Survey (2014-2016): sole full-stack developer for the NASA MEaSUREs project mapping cropland across continental Africa.
- **Publications:** "Visual search over billions of aerial and satellite images," Computer Vision and Image Understanding (2020); "Automated cropland mapping of continental Africa using Google Earth Engine cloud computing," ISPRS Journal of Photogrammetry and Remote Sensing 126 (2017), DOI: 10.1016/j.isprsjprs.2017.01.019; "You Need to Rewrite Your CLI for AI Agents" and "The MCP Abstraction Tax" (2026).
- **Current projects:** Tracios (LoRa mesh off-grid event tracking: embedded Rust firmware on nRF52, TDMA mesh protocol, TAK/CoT gateway); IronProse (Rust fiction-writing toolchain: custom prose AST, LLM distillation to GLiNER fine-tuning to ONNX export, models on Hugging Face); gline-rs an
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