SScott Cochran1d ago · 8 min readTOPAK: Every Agent Is ByzantineTL;DR TOPAK is an architecture pattern for agentic AI collaboration that is inspired by "Safe by Design" principles. T (TLA+): Formally verifiable state evolution that is testable, checkable, and som1grippinghand.dev
EErik RekolaOct 22 · 22 min readTLA+ on my own tools, in numbersThis is the fourth and last part of the series that began with Twelve days of TLA+ on my own tools, continued in Thirteen review rounds and one rollback and went on with Three outside reviews of my TL4Mturva.dev
EErik RekolaOct 17 · 10 min readThree outside reviews of my TLA+ modelsThis is the third part of the series that began with Twelve days of TLA+ on my own tools and continued in Thirteen review rounds and one rollback. Part 2 ended with five fix rounds of the first outsidturva.dev
EErik RekolaOct 9 · 7 min readTwelve days of TLA+ on my own toolsOn 22 September Boris Cherny, who created Claude Code, wrote on X that he had used Opus 5.5 to formally verify the Claude Agent SDK with Lean. Further down his post he added, "TLA+ also works well. I 1turva.dev
999 sunnySep 22 · 7 min readAn executable proof trail beats a spectacular claimEpistemic status: Independent clean-room replay of a public Lean 4 artifact (v1.0.0) for a weakened Goldbach-type statement about the Liouville function. I am reporting what rebuilt and what I checkedsunny99.hashnode.dev
MManu ShuklaAug 3 · 14 min readOpenAI's Astra solved 10 open problems for $2,000: the lesson is the verifierOpenAI's Astra solved 10 open problems for $2,000: the lesson is the verifier Summary. On 1 August 2026 OpenAI published ten results in mathematics and theoretical computer science, all produced by anecorpit.hashnode.dev
VVaibhav TekamJul 14 · 8 min readAI Can Migrate Your COBOL to Java. It Can't Prove It Didn't Break Anything. We Built the Part That Does. Every bank, insurer, and government system running on a mainframe today is sitting on COBOL that nobody wants to touch and nobody can afford to leave alone. AI coding agents have made the migration ittech4biz-solutions.hashnode.dev
JJeremy LongshoreJul 1 · 14 min readDeep Dive Part 4: Z3 Formal Verification, the Three-Layer Stack, and Claude Code as ArchitectEvery AI-governance product running today uses some version of LLM-as-a-judge: feed the agent's output to a second model and ask it whether the first model behaved. It is probabilistic reasoning aboutjeremylongshore.hashnode.dev
JJason VertreesJun 3 · 4 min readTwo Quiet Results, One Shared Lesson: Where Capability Gains Are Coming From NowTwo pieces of news showed up this week that are easy to miss in isolation but worth reading together. The first is a developer demonstration: an apparent Opus 4.8 model produced a formally verified prjvertrees.hashnode.dev
LLilian CariouFeb 1 · 14 min readMum, I'm auditing a math heavy codebase, what do I do ?I spent 3 days including saturday and sunday deriving formulas from the Gyro ECLP whitepaper. Line by line. Variable by variable. By Sunday night, I understood the math beautifully, and had found exactly zero bugs. That weekend taught me something im...rasengansec.hashnode.dev
