# velvet — RSS Amplifier Recent posts from the 4 feeds in the RSS Amplifier directory that cover velvet. Page: Feed: --- ## [Sette Picasso](https://brushstrokesandfaultlines.substack.com/p/sette-picasso) _2026-08-17 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ The Velvet Blade II, Chapter 12 ## [When the Hard Part Stops Being Hard](https://proofsandintuitions.net/2026/08/14/when-the-hard-part-stops-being-hard/) _2026-08-14 · Ilya Sergey · Proofs and Intuitions_ A few days ago, a paper I co-authored, Tracking Borrows with Regular Expressions, was accepted to OOPSLA’26. It presents a new type system for Move, a Rust-style smart contract language, built on a rather cute idea: using regular expressions to capture heap reachability. I won’t go into the technical details here. What I want to talk about instead is how the paper was made and how the publication… ## [Dopo Francoforte](https://brushstrokesandfaultlines.substack.com/p/dopo-francoforte) _2026-08-06 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ The Velvet Blade II, Chapter 11 ## [Time's Conversation](https://brushstrokesandfaultlines.substack.com/p/times-conversation) _2026-08-06 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ B&F Vol. 12, August 2026 ## [Fif](https://www.wavlake.com/album/00a79aac-e98f-4876-9ac8-3402149df202) _2026-08-01 · DJ High Yona · Fif_ [Listen](https://op3.dev/e,pg=14eea730-6e8d-5f42-beb8-92cc32bbc875/https://d12wklypp119aj.cloudfront.net/track/d56616d3-c005-4b7e-a52f-e2d21746cbf5.mp3) ## [Carte, Stanze, Rotture](https://brushstrokesandfaultlines.substack.com/p/carte-stanze-rotture) _2026-07-11 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ The Velvet Blade II, Chapter Ten ## [Office Work](https://brushstrokesandfaultlines.substack.com/p/office-work) _2026-07-03 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ The Velvet Blade II, Vignette 44 ## [The White Duck](https://brushstrokesandfaultlines.substack.com/p/the-white-duck) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ The Velvet Blade II, Vignette 43 ## [Where Memory Stands](https://brushstrokesandfaultlines.substack.com/p/where-memory-stands) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ On mountains, monuments, walls, and the warning written plainly before us ## [Stonewall Is Not A Relic](https://brushstrokesandfaultlines.substack.com/p/stonewall-is-not-a-relic) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ Stonewall is a strange name for a place where something broke open. ## [Open coordination for humans & AI (Sponsored)](https://crawlproof.com/a/8maX8nh4nmf9) _2026-07-01 · **Sponsored**_ Shared schemas and CLI tooling to validate, route, and audit human-agent workflows. ## [The Sacred Site and The State](https://brushstrokesandfaultlines.substack.com/p/the-sacred-site-and-the-state) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ A shrine does not always announce itself with bells. ## [Landmark Decisions](https://brushstrokesandfaultlines.substack.com/p/landmark-decisions) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ Not every monument is made of stone. ## [The Art That Wants to Go Home](https://brushstrokesandfaultlines.substack.com/p/the-art-that-wants-to-go-home) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ There are objects in museums that appear calm because glass has taught them stillness. ## [The Museum Under Siege](https://brushstrokesandfaultlines.substack.com/p/the-museum-under-siege) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ A museum does not have to burn to be under siege. ## [When Statues Fall](https://brushstrokesandfaultlines.substack.com/p/when-statues-fall) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ A statue does not fall all at once. ## [The Stone that Learns to Lie](https://brushstrokesandfaultlines.substack.com/p/the-stone-that-learns-to-lie) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ A monument begins with ambition. ## [Shrines on Foreign Soil](https://brushstrokesandfaultlines.substack.com/p/shrines-on-foreign-soil) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ There are places where a nation becomes smaller than its dead. ## [The Obelisk and The Nation](https://brushstrokesandfaultlines.substack.com/p/the-obelisk-and-the-nation) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ There is something almost too simple about the Washington Monument. ## [The Gods On The Hill](https://brushstrokesandfaultlines.substack.com/p/the-gods-on-the-hill) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ Before the monument became a postcard, it was a climb. ## [The Wall Before The Word](https://brushstrokesandfaultlines.substack.com/p/the-wall-before-the-word) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ Before we had monuments, we had walls. ## [8.1% APY Plus Free Stock (Sponsored)](https://crawlproof.com/a/FQANxYkH9elV) _2026-07-01 · **Sponsored**_ Claim 8.1% APY and up to $1,030 in SK hynix and Nvidia stock. ## [When Awe Became Architecture](https://brushstrokesandfaultlines.substack.com/p/when-awe-became-architecture) _2026-07-01 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ Before the monument had a name, there was awe. ## [Terzo Strumento](https://brushstrokesandfaultlines.substack.com/p/terzo-strumento) _2026-06-26 · Brushstrokes and Faultlines · Brushstrokes and Faultlines_ The Velvet Blade II, Chapter 9 ## [Liveness Proofs in Veil, Part I: The First Step](https://proofsandintuitions.net/2026/06/24/liveness-proofs-in-veil-part-1/) _2026-06-24 · Qiyuan Zhao · Proofs and Intuitions_ Safety property means “nothing bad happens during the run of a program”; liveness property means “the program eventually does something good”. In this post, we walk through a simple proof of a liveness property in Veil, using a basic consensus protocol as an example. ## [On the Unreasonable Effectiveness of Property-Based Testing for Validating Formal Specifications](https://proofsandintuitions.net/2026/05/18/property-based-testing-specifications/) _2026-05-18 · Yueyang Feng · Proofs and Intuitions_ In this post, we show that property-based testing (PBT) is surprisingly effective for validating LLM-synthesised specifications of Lean programs: it is a cheap alternative to symbolic proofs, which helped to detect underspecification in 10% of the specs in state-of-the-art benchmarks for verified code generation. ## [Verifying Move Borrow Checker in Lean: an Experiment in AI-Assisted PL Metatheory](https://proofsandintuitions.net/2026/03/18/move-borrow-checker-lean/) _2026-03-18 · Ilya Sergey · Proofs and Intuitions_ I formalised and proved the correctness of Move’s new borrow checker in Lean: 39,000 lines of mechanised metatheory, produced in under a month with the help of an AI coding assistant. This post tells the story of how it went and what it means for the future of PL research. ## [Verifying Distributed Protocols in Veil](https://proofsandintuitions.net/2026/02/09/distributed-verification-veil/) _2026-02-09 · Ilya Sergey · Proofs and Intuitions_ In this post, we discuss how to formalise, test, and prove the correctness of a classic distributed protocol by combining model checking, automated deductive verification, and AI-powered invariant inference in Veil, a new auto-active Lean-based verifier for distributed protocols. ## [Multi-Modal Program Verification in Velvet](https://proofsandintuitions.net/2026/01/21/multi-modal-verification-velvet/) _2026-01-21 · Ilya Sergey · Proofs and Intuitions_ In this post, we will show how to specify and verify imperative programs in Lean 4 using Velvet—an embedded verifier, which relies on a combination of automated symbolic and AI-assisted theorem proving techniques. ## [Hello, World!](https://proofsandintuitions.net/2026/01/10/hello-world/) _2026-01-10 · Ilya Sergey · Proofs and Intuitions_ Welcome to Proofs and Intuitions! This is a blog about mathematics, formal verification, and the ideas that connect them.