Author: Xiaomeng Wang
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Minimal setup for inter AI agent communication with herdr
herdr has no network layer of its own, just a local socket. Turns out that’s enough: SSH forwarding gets two agents on different machines talking both ways, no server required.
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Where Facebook hides the permalink
Five ways to grab a Facebook post’s link that all fail, the one place the link is actually sitting, and how to make sure you never capture the wrong one.
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Your Server Has Been Trying to Tell You Something
A compute box with no mail stack, taught to reach real inboxes through a mailbox we already owned. Plus the parts every send-only Postfix tutorial skips, and the failure that shows up only once it works.
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Torch Visualized: The Operations
Fifty PyTorch tensor operations, one 3D figure each: input and output superimposed at a shared origin, with the runnable call and the shape change on every page.
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Train a Transformer on Silicon: #3 The Memory Is the Chip
v0’s die was 85% SRAM. H01 packs the flat memory map with liveness analysis and an early-SGD reschedule — 145,952 words down to 90,896, the die from 6.99 to 4.55 mm², 35% smaller — without changing one logic gate. The compute was never the problem; the memory was.
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Train a Transformer on Silicon: #2 A Decoder Is Just an Encoder with a Mask
v0 is done: a nanoGPT-faithful decoder layer that trains itself — forward, backprop, and SGD update — bit-exact against a golden model and taken to a clean 45 nm layout. The compute fit in 0.117 mm² of logic; the memory took 85% of the die.
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Train a Transformer on Silicon: #1 Backprop on a Chip
Most AI chips run a model someone else trained; this one does the training itself — forward pass, backpropagation, and weight update, in fixed-point RTL, all the way down to a 45 nm layout.
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Publication-Quality Chip Layout Figures from Innovus, Headlessly
Innovus has no vector export and its GUI screenshots don’t scale. Here’s a fully scripted pipeline: a headless 16,000-pixel render, block coordinates pulled from the P&R database, a zero-residual pixel-to-micron calibration, and a matplotlib wrapper that turns it all into a self-describing PDF/SVG figure.
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Benchmarking 17 AI Models on Razavi’s Analog Design Questions
I re-ran Behzad Razavi’s ‘Analog Mind’ LLM experiments across 17 model configurations, with a controlled anonymized grader and ngspice as the referee. The methodology moved scores as much as the models did.
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One Prompt, One Complete IEEE Transactions Project with Claude Code
A single copy-pasteable prompt that makes Claude Code scaffold a complete IEEE Transactions LaTeX project: main manuscript, S-numbered supplementary materials, a shared author file, and a full revision workflow – with no dependencies beyond a TeX distribution and make.
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Train a Transformer on Silicon: #0 The Genesis
Start here — the series hub A short intro to a series where I build a chip that trains a transformer — and document the whole thing, mistakes included. What this is I’m building a digital chip that trains a transformer on-chip — not just runs it, but actually learns: forward pass, backpropagation, and weight…
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Hello from WP-CLI: KaTeX & Code Block Pro
This post was created from the terminal with WP-CLI, then edited again from the terminal to add the two elements below — a live equation and a syntax-highlighted code block, both rendered by this blog’s existing plugins. A little math, via the KaTeX plugin Euler’s identity sits inline in the text: . A display equation…
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Replacing Your Python Script With Another Program: os.execvp
I wanted a small launcher for Claude Code that read its settings from a YAML file — env vars, flags, working directory, that kind of thing. Something I could version-control and tweak without remembering a 200-character invocation. My first attempt printed the command line. My second attempt was better, and along the way I finally…
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Cadence IC25.1: “Failed to find licenses Virtuoso_ADE_Artist” and How to Fix the Virtuoso Hotfix Install
I spent a good chunk of time upgrading Cadence Virtuoso’s optimizer (AOP) from IC25.1 base to the ISR4 hotfix. What should’ve been a routine update turned into two rabbit holes: the optimizer was checking for a license that doesn’t exist on most servers, and the hotfix installer kept dying on symlinks that point to each…