JS Wei (Jack) Sun

NVIDIA bets on Cosmos 3, Willison endorses 'cancel AI,' Datasette ships 1.0a32

Every URL the pipeline pulled into ranking for this issue — primary sources plus the supporting and contradicting findings each Researcher returned. Inline citations in the issue point back here.

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Sources

Welcome NVIDIA Cosmos 3: The First Open Omni-model for Physical AI Reasoning and Action huggingface.co

The solution might be cancelling my AI subscription simonwillison.net

The solution might be cancelling my AI subscription I find this post by David Wilson very relatable. David lists 16+ projects he’s spun up with AI tooling, and concludes: I didn’t mean to build most of these things. Usually the Claude session started with something like ” write a quick script for X ”, and one hour later the result is not a quick script for X , nor in the usual case is my problem solved, whatever the original itch happened to be. On that last point, this technology is horrific f…

datasette 1.0a32 simonwillison.net

Release: datasette 1.0a32 A minor bugfix release. Fixes a bug with INSERT … RETURNING queries via the new /db/-/execute-write endpoint and a bunch of base_url issues which showed up when I was experimenting with Service Workers yesterday. Tags: datasette , annotated-release-notes

References

Vital Law / Wolters Kluwer (Youngblood v. Nvidia complaint summary) vitallaw.com

NVIDIA allegedly downloaded over 38 million video URLs from YouTube using virtual machines and proxy services to bypass the platform’s anti-scraping blocks… plaintiffs argue that NVIDIA violated Section 1201 by circumventing technological protection measures.

Liang et al., ‘Mixture-of-Transformers’ (arXiv 2411.04996) arxiv.org

In the Transfusion setting, a 7B MoT model matches the dense baseline’s image performance using only one-third of the FLOPs

AI Business Weekly — DeepMind Genie 3 vs NVIDIA Cosmos comparison aibusinessweekly.net

Genie 3 maintains a visual memory of approximately one minute, ensuring environmental consistency… NVIDIA’s Cosmos 3 focuses more on shorter, high-accuracy ‘imagination’ cycles for robots, predicting up to 30 seconds of future state

Runaker, ‘The sim-to-real gap isn’t about physics — it’s about time’ (Medium) runaker.medium.com

Even if a model understands gravity, it may fail in the real world due to latency issues—the 50–100ms lag in physical servos that a simulator often overlooks.

HeadsUpAI — NVIDIA adopts OpenMDW 1.1 headsupai.io

if a provider releases a model under OpenMDW but withholds a significant portion of the training dataset, they could still claim ‘open source’ status while maintaining a proprietary edge

Hyper.ai roundup on V-JEPA 2 vs generative world models hyper.ai

V-JEPA 2 has demonstrated the ability to perform zero-shot planning on real hardware (such as Franka arms) in seconds, requiring only 62 hours of robotic data… generative ‘world-action models’ often result in minutes of computation for a single action

Hacker News thread 48345896 (comment by akvadrako) news.ycombinator.com

20 minutes of back-and-forth prompting… the official documentation contained the exact solution in a condensed form that would have taken only 5 to 10 minutes… ‘WTF am I doing with my time?!’

ISCAP 2025 proceedings — generative AI and ADHD developers iscap.us

Junior developers with ADHD can see productivity gains of up to 55% in code generation… neurodiverse professionals report 25% higher satisfaction with AI tools compared to their neurotypical peers

dev.to — ‘The Skill Atrophy Crisis’ (Karsulkar, 2026) dev.to

developers who fully delegate tasks to AI perform 17% worse on conceptual debugging quizzes compared to those who code manually

Tembo blog — AI technical debt (citing GitClear) tembo.io

an eightfold increase in duplicated code blocks and a historic low in refactoring activity

Simon Willison — ‘Agentic Engineering Patterns’ (Feb 2026) simonwillison.net

a ‘five-word prompt’ — use red/green TDD — which directs agents to write a failing test, implement the solution, and then verify the pass… start projects from thin templates

PCMag — Replit AI agent deletes SaaStr production database (July 2025) pcmag.com

the agent panicked after seeing empty queries and attempted to fabricate data to hide its errors, despite explicit instructions to ‘freeze’ changes

Simon Willison — Pyodide ASGI in the browser simonwillison.net

The Service Worker intercepts all same-origin requests under /app/ and routes them through the Python ASGI protocol, letting the browser treat generated HTML as a standard web page — finally enabling execution that the original Web Worker model blocked.

simonwillison.net — service-workers tag simonwillison.net

Serving .wasm through a Service Worker without careful handling breaks the browser’s compiled-code caching, forcing expensive Wasm re-compilation on every visit; initial Pyodide load still requires ~30MB of binaries.

sqlite.org — RETURNING docs sqlite.org

RETURNING was added in SQLite 3.35.0 (2021); it cannot reflect changes made by triggers, cannot be used as a subquery, and top-level aggregate or window functions are not permitted in the expression list.

SQLAlchemy issue #6047 github.com

Python’s sqlite3 executemany() executes the statement for each parameter set but discards all returned rows — maintainers kept the behavior for PEP 249 backward compatibility, frustrating developers expecting a list of generated IDs from bulk inserts.

Datasette changelog (1.0 alpha series) docs.datasette.io

execute_write_fn() now defaults to transaction mode after early implementers reported frequent ‘database locked’ errors when failing to manually wrap writes in transactions.

simonwillison.net — datasette tag (base_url history) simonwillison.net

base_url remains ‘a magnet for issues’ — hardcoded paths in the UI and certain JSON/CSV export links have repeatedly bypassed the setting, and 2025 reports describe ‘double-prefixing’ regressions like /data/data/table in Kubernetes Ingress and jupyter-server-proxy setups.

Jack Sun

Jack Sun, writing.

Engineer · Bay Area

Hands-on with agentic AI all day — building frameworks, reading what industry ships, occasionally writing them down.

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