# The Deep Feed > Long-form research on AI. One institutional byline. Published when a piece is ready, not before. Tagline: Long-form research on AI. Site: https://www.thedeepfeed.ai Author: The Deep Feed ## Latest piece ### Mastra in production: the advanced patterns I actually ship I have shipped Mastra across six TypeScript codebases over the full 1.x line — a market-intelligence API, an autonomous-CMO product, a crypto trading agent, a personal assistant. This is the comprehensive operator playbook: memory's four layers, tools and workflows, supervisors, MCP on both ends, RAG and evals, the free server and auth layers, observability, the whole 1.x migration history, and the production bugs that taught me the most. Read: https://www.thedeepfeed.ai/posts/2026-06-26-mastra-advanced-patterns-in-production/ · Markdown: https://www.thedeepfeed.ai/posts/2026-06-26-mastra-advanced-patterns-in-production.md ## Recent posts - [Mastra in production: the advanced patterns I actually ship](https://www.thedeepfeed.ai/posts/2026-06-26-mastra-advanced-patterns-in-production/) — I have shipped Mastra across six TypeScript codebases over the full 1.x line — a market-intelligence API, an autonomous-CMO product, a crypto trading agent, a personal assistant. This is the comprehensive operator playbook: memory's four layers, tools and workflows, supervisors, MCP on both ends, RAG and evals, the free server and auth layers, observability, the whole 1.x migration history, and the production bugs that taught me the most. (Tools, 2026-06-26) - [The agent-eval startups raising on a metric nobody trusts](https://www.thedeepfeed.ai/posts/2026-06-25-agent-eval-startups-metric-nobody-trusts/) — Investors have poured serious capital into agent evaluation, observability and benchmarking. **Braintrust** raised **$80M at $800M**, **LangChain** **$125M at $1.25B**, **LMArena** **$100M then $150M at $1.7B**, **Patronus** a fresh **$50M Series B** on June 25. The product they sell is a number. The research says the number is broken: up to **100%** relative error on agent benchmarks, **27** private variants gaming one leaderboard, and a 1MB blind script beating frontier agents. (Business, 2026-06-25) - [The open-weight reasoning gap is now 3.4 months, and the math is public](https://www.thedeepfeed.ai/posts/2026-06-24-open-weight-reasoning-gap-three-months/) — On June 16, GLM-5.2 became the leading open-weight model on the Artificial Analysis Intelligence Index v4.1 at **51**, ahead of every Google model and **3.4 months** behind the equally-capable closed model. The smallest gap on record is now **2.2 months** (DeepSeek V4 Pro). The peak was **9.8 months** in December 2024. The reasoning frontier the closed labs owned outright is now a quarter-year head start, priced in the open. (Models, 2026-06-24) - [Cursor Compile 2026: the vertical stack lands, and a warning on the same stage](https://www.thedeepfeed.ai/posts/2026-06-23-cursor-compile-2026-vertical-stack-and-the-warning/) — At its first Compile conference, Cursor announced a from-scratch model on SpaceX compute, Origin (a GitHub rival), and Cursor Mobile. Its design lead used the stage to warn the result could be slop with working buttons. (Agents, 2026-06-23) - [How much is the harness worth? The year the number got measured](https://www.thedeepfeed.ai/posts/2026-06-22-how-much-is-the-harness-worth-measuring-agent-scaffolds/) — Six weeks after agent harness engineering got named, the empirical question arrived: how much of a coding agent's score is the model, and how much is the scaffold around it. Four 2026 papers put numbers on it — and the numbers are larger than almost anyone guessed. (Agents, 2026-06-22) - [Supermemory open-sourced its memory engine. The moat moved somewhere else](https://www.thedeepfeed.ai/posts/2026-06-21-supermemory-open-source-memory-engine-moat/) — On June 10 Supermemory shipped its graph engine as a local binary anyone can run for free. Reading the repo, the docs, and the benchmark fight shows the giveaway is a distribution play, not a surrender. (Agents, 2026-06-21) - [The week sovereign AI got a price: mapping the raises the export shutoff triggered](https://www.thedeepfeed.ai/posts/2026-06-20-sovereign-ai-funding-wave-mapped/) — In one mid-June week, Dream raised $260M, Sarvam closed $234M, Odyssey $310M and General Intuition ~$300M — all filed under 'sovereign AI.' The export-control shutoff turned a marketing phrase into a procurement requirement. But the label hides two very different bets. (Business, 2026-06-20) - [When Sanders and Trump want the same 50%: AI's ownership question goes bipartisan](https://www.thedeepfeed.ai/posts/2026-06-19-ai-public-ownership-left-right-convergence/) — Bernie Sanders introduced a bill to take a 50% public stake in the largest AI firms. Days earlier, Trump floated the government taking equity too. When the socialist left and the nationalist right reach for the same lever, the interesting question isn't the policy — it's what they both saw. (Policy, 2026-06-19) - [Wall Street's Claude blackout and the export control that enforces itself](https://www.thedeepfeed.ai/posts/2026-06-18-wall-street-claude-blackout-export-control/) — JPMorgan cut Hong Kong staff off from Claude on June 18, weeks after Goldman did the same. The reason wasn't security — it was licensing fine print. That is how a vague export control the courts would never uphold gets enforced anyway: by private compliance teams. (Policy, 2026-06-18) - [SuperServe, field-tested: what 356 live assertions reveal about an agent runtime](https://www.thedeepfeed.ai/posts/2026-06-17-superserve-field-tested-agent-runtime/) — SuperServe's landing page makes four promises. We drove the live API 356 ways across 24 test phases — booting every template, running nine agent runtimes, executing a multi-agent swarm — to map the gap between the spec sheet and the substrate. (Tools, 2026-06-17) - [Vercel's eve and the agent-as-a-directory bet](https://www.thedeepfeed.ai/posts/2026-06-21-vercel-eve-agent-framework-directory-of-files/) — Vercel open-sourced eve at Ship London — a framework where an agent is a folder of files. We built 75 agents on it and ran an adversarial review. Here's what holds up, what breaks, and the stateful-on-stateless tension the launch posts skip. (Tools, 2026-06-17) - [44% of YC's Spring 2026 batch is the same company. That's the bet.](https://www.thedeepfeed.ai/posts/2026-06-16-yc-spring-2026-agent-batch-bet-against-moats/) — A founder analyzed all 196 YC Spring 2026 companies and found 86 are the same shape: AI-native B2B Agent-as-a-Service. That convergence is YC's 2024 vertical-agent thesis executed at scale — and a wager that speed beats defensibility. (Business, 2026-06-16) ## Categories - [Models](https://www.thedeepfeed.ai/categories/models/) - [Agents](https://www.thedeepfeed.ai/categories/agents/) - [Products](https://www.thedeepfeed.ai/categories/products/) - [Business](https://www.thedeepfeed.ai/categories/business/) - [Research](https://www.thedeepfeed.ai/categories/research/) - [Tools](https://www.thedeepfeed.ai/categories/tools/) - [People](https://www.thedeepfeed.ai/categories/people/) - [Policy](https://www.thedeepfeed.ai/categories/policy/) ## Editorial - [About](https://www.thedeepfeed.ai/about) - [Masthead](https://www.thedeepfeed.ai/masthead) - [Corrections](https://www.thedeepfeed.ai/corrections) - [Contact](https://www.thedeepfeed.ai/contact) - [Privacy](https://www.thedeepfeed.ai/privacy) ## Machine-readable surfaces - [llms.txt — agent index](https://www.thedeepfeed.ai/llms.txt) - [llms-full.txt — full corpus](https://www.thedeepfeed.ai/llms-full.txt) - [RSS feed](https://www.thedeepfeed.ai/rss.xml) - [Sitemap](https://www.thedeepfeed.ai/sitemap-index.xml) - [OpenAPI service description](https://www.thedeepfeed.ai/.well-known/openapi.json) - [API catalog](https://www.thedeepfeed.ai/.well-known/api-catalog) (RFC 9727) - [AI plugin manifest](https://www.thedeepfeed.ai/.well-known/ai-plugin.json)