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  1. 123

    Lambda MicroEgg

    lambda-microegg is a Rust e‑graph library that adds scoped, alpha‑aware binders and Miller‑style higher‑order patterns to the Egg framework, enabling capture‑avoiding substitution and higher‑order rewriting with modest performance overhead.

    Lobstersphilipzucker.com15 minHN3lobste.rs27
  2. 125

    Backups Aren't Simple

    Backups involve more than copying files; you need snapshot rotation, deduplication, and off‑site storage to meet RPO goals while controlling storage and bandwidth. Using proven tools like Borg or Restic and regularly testing restores simplifies the mental load.

    Hacker News front pagefilipovski.net8 minHN353222
  3. 126

    Our brain evolved from two primitive nervous systems that merged: Study

    A new study shows that the forebrain and hindbrain develop from distinct progenitor cells (OTX2‑expressing and GBX2‑expressing) in mouse, human, chicken, zebrafish and acorn worm embryos, suggesting the vertebrate brain originated from the merger of two primitive nervous systems over 550 M years ago. This insight enabled the first successful in‑vitro generation of human hindbrain motor neurons.

    Hacker News front pagenewscientist.com3 minHN13275
  4. 128

    Labeled matches: why is this not in every regex engine?

    The author shows how to label tokens (dates, money, emails, etc.) with a single regex pass using extended operators (`&` for intersection, `~` for complement) in the resharp library. A tiny benchmark compares 10 patterns against spaCy’s NER, reporting ~1.9 GB/s (≈4500× faster) on 8 threads. The post lists the concrete patterns and argues that for deterministic, regular‑language entities regex can…

    Lobstersiev.ee7 minHN5lobste.rs27
  5. 129

    Jev-Leftpad

    A joke npm package that pads strings by calling a TypeSafe LLM model, essentially replicating `padStart()` with unnecessary API calls. Not production‑ready and offers no real engineering insight.

    Hacker News front pagegithub.com1 minreleaseHN22887
  6. 132

    Reinventing issue tracking: Local-first and Git-native

    A devlog describing how Manganin’s issue tracker stores issues in a dedicated Git repo as plain files, after rejecting earlier approaches that tried to embed issue data in the code tree or Git refs. The author explains the pitfalls of using refs for issue storage, shows the low‑level Git commands needed for that approach, and then outlines the final design: a hidden sister repository where each i…

    Lobstersmanganin.dev6 minHN1lobste.rs27
  7. 136

    How Uber Protects Against Retry Storms

    Uber developed a context-aware mechanism to prevent retry storms in deep microservice dependency chains. It introduces "error ownership" where services claim errors they originate and unclaim errors they propagate, allowing upstream callers to make informed retry decisions and avoid amplifying load on already struggling services.

    Hacker News front pageuber.com12 minHN11949
  8. 141

    Accurate Models of AMD Matrix Cores

    The authors reverse‑engineer AMD’s CDNA matrix cores, build per‑architecture MATLAB models that match hardware bit‑for‑bit on 10 M random tests, and use them to compare AMD vs NVIDIA tensor‑core accuracy.

    Hacker News front pagearxiv.org2 minpaperHN7911
  9. 143

    How good are frontier models at physics?

    The authors audit six popular physics benchmarks by having domain experts re‑grade model outputs, fixing reference answers and removing ambiguous items. After correction, GPT‑5.6‑Sol’s mean@4 jumps from ~47 % to ~79 % on HLE‑Physics and from ~61 % to ~87 % on CMT‑Benchmark, with a corrected pass@4 of 94 % on 54 vetted CritPt challenges. The work shows current benchmarks severely under‑report LLM…

    Hacker News front pagearxiv.org2 minpaperHN9650
  10. 147

    Grok 4.7

    xAI announced Grok 4.7, a new LLM for coding and knowledge work. The post claims it’s twice as fast and half the price of comparable models, and shows a CursorBench 4.0 chart with a 46.3 % “Extra High” score at $6.01 average cost per task. No architecture details, training data, or engineering rationale are provided.

    Hacker News front pagex.ai2 minreleaseHN519440
  11. 148

    I vibed a proof of Conway's conjecture

    The author used Claude to generate a Lean formalisation and proof of Conway’s refinement conjecture for omnific (surreal) integers. The proof passes mechanical checks and informal review but lacks independent verification. The post narrates the workflow, token cost, and reflections on AI‑assisted theorem proving.

    Hacker News front pageoverreacted.io32 minHN269294
  12. 149

    PACT: Can Enterprise AI Assistants Be Trusted Under Pressure?

    PACT is a new benchmark designed to measure how well enterprise LLM agents follow compliance rules, especially when under user pressure. It found substantial variability across 22 models, with even the strongest assistants misapplying rules 6-10% of the time, and user pressure increasing violation rates by 65% on average.

    Hugging Face Daily Papersarxiv.org2 minpaper
  13. 150

    Why Does an NPM Math Library Need an Encrypted Loader?

    SafeDep discovered that several npm packages masquerading as mathjs contain an encrypted loader that only activates when a caller passes a particular matrix to the LU solver, using the matrix’s lower‑triangular factor as the decryption password. The loader decrypts and executes a multi‑stage remote‑access implant that talks to Slack, Telegram and a blockchain contract, and the same technique is r…

    Hacker News front pagesafedep.io10 minHN11535