Mayphus Tang

The Tailscale subnet route that was approved but never arrived

An approved Tailscale subnet route never reached my phone because the tightened tailnet policy gave no one access to that subnet; one ACL rule fixed it.

My IP camera, live on a Roku TV

A TP-Link camera's 4K HEVC RTSP stream, transcoded on pb62 to 1080p H.264 HLS and played by a small sideloaded Roku channel.

A silent Roku remote, and a bug in my diagnostic

An unresolved Roku voice failure led me to a race in my own diagnostic and an early key-release event worth isolating.

Content-first design

A quiet reading interface, with familiar neutral colours, clear hierarchy and room for the content.

From hands-on operations to AI-assisted systems engineering

How my operations and repair experience connects to AI-assisted work, with a practical learning plan for diagnosis, verification, delegation, and recovery.

Reconstructing an unattended Ubuntu install from local media

A remembered mini-PC deployment decision, tested through a new isolated reconstruction: one unattended legacy Ubuntu installation, an instrumented disk boot, and explicit…

Understanding computer systems

A connected learning guide to files, processes, storage, services, networking and boot, with distinct Linux and FreeBSD paths and evidence from real investigations.

A local Android preview for my GoSure 3201

I traced the local control path of my Philips GoSure 3201 and built a small Android app that showed its live camera stream.

Building a Responses gateway with explicit limits

An archived local gateway connected Responses clients to model-provider endpoints while keeping translation, streaming, credentials, and unsupported features explicit.

From a U-Boot prompt to FreeBSD in RAM

A September 2026 NanoPi R2S experiment proved a FreeBSD single-user shell with a RAM-backed root, then separately verified a persistent SD installation.

An iPad at the front, a workspace behind it

How I am moving my personal work toward an iPad interface, a local Ubuntu workspace, and AI tools that carry out the technical steps.

GPT-124M from scratch: benchmarking and restart recovery

A randomly initialized GPT-124M trained on 1,000,341,504 tokens using free Kaggle T4s, with verified cross-session recovery and final in-domain evaluation.

Making a four-province expressway atlas lighter

A four-province OpenStreetMap atlas: static snapshots, quarter-degree data partitions, and smaller viewport loads, with visual QA still unfinished.

An experimental FreeBSD USB Ethernet workaround for the NanoPi R2S

A recorded NanoPi R2S experiment: delaying USB3 link power management improved RTL8153B initialization, while actual U1/U2 transitions and a general repair remain unproven.

From silent UART to a working NanoPi R2S

An evidence-led NanoPi R2S investigation: isolate an unreliable UART path, identify a wrong Rockchip image, boot Alpine Linux, and map the RK3328 SD-card chain.

Twelve volts, one wrong pin

OpenLens: a local-first camera that admits what it does not know

Building a portable multilingual learning companion, testing offline vision on Android, and keeping model uncertainty visible.

A TinyStories model on my RP2040 board

Training, quantizing, and physically verifying a tiny Transformer on a custom Raspberry Pi Pico display board through intention-and-observation collaboration with an AI agent.

The real value of an AI agent

The old depth camera was not dead

A week of verified loops

AI-centered robot stack

I do not think ROS 2 should be the center of a modern robot.

Sugar from a soldier

Testing a grandmother’s memory of Japanese soldiers giving sweets to children in wartime Liu Yuan against Japanese and international records.

How I work with AI

A short explanation of how I use ChatGPT, Codex, Git, and Mayphus as one practical workflow.

A Roku remote through Tailscale

How any available Wi-Fi, manual IP entry, and Tailscale made the official Roku app remote work from outside home.

I’m going to finish investigating the three TP-Link security cameras with the new ChatGPT…

I am trying to develop a workflow that lets me work mostly on the go—with mobile devices,…

I am trying to develop a workflow that lets me work mostly on the go—with mobile devices, ChatGPT, AI, and Codex—while leaving time for life away from the desk.

ChatGPT desktop quietly added passkey/password support to its in-app browser — something…

ChatGPT desktop quietly added passkey/password support to its in-app browser — something I’ve wanted for weeks.

chatgpt, work, codex may share ui.

I used ChatGPT Atlas as my main browser and loved it, even though it’s no longer…

I used ChatGPT Atlas as my main browser and loved it, even though it’s no longer maintained.

Some people dislike GPT-5.6 and the “super app.” I think they’re amazing.

codex in-app browser needs passkey support @thsottiaux

Today's realization: I'm not at my best when answering from memory.

Looks inside Roku Remote

My Roku Remote voice feature don't works weeks ago, and today all buttons don't works.

Forget the superapp.

June 29, 2026

A YouTube Short.

Just migrated my codebase to my mini PC.

My Roku remote can’t listen to me.

I don’t remember the commands anymore.

@naval Humans should do the work, AI should do the documenting.

After reinstalling the Codex mobile app and pairing it again, sync issues disappeared.

Fixed a sync issue between Codex Desktop and the mobile app.

I just realized I first tried ROS almost 10 years ago.

February 10, 2026

A YouTube Short.

February 11, 2026

A YouTube Short.

Found these old photos today.

June 25, 2026

A YouTube Short.

June 25, 2026

A YouTube Short.

June 12, 2026

A YouTube Short.

Today I learned how to flip an egg pancake in a pan

A YouTube Short.

June 11, 2026

A YouTube Short.

my lithium battery burn by itself.

Router service recovery through a Tailscale jump

A short operations note on recovering a router service through an independent Tailscale jump host when direct access is gone.

A generated Flypy double-pinyin skin.

June 10, 2026

A YouTube Short.

Rime Input Method and Yuanshu Input method's Schema and Skin generator.

I am building a single, unified Racket project to orchestrate my entire personal…

I am building a single, unified Racket project to orchestrate my entire personal infrastructure.

A tiny FreeBSD jail doc fix

A short note on fixing relative symlinks in the FreeBSD Handbook's NullFS thin-jail recipe.

I just used my Emacs to check my homelab computer k3s's service when I am out of home.

In September 2025, I contributed a small fix to weapp-vite, a Vite-based build tool for…

In September 2025, I contributed a small fix to weapp-vite, a Vite-based build tool for WeChat mini-programs.

Just powered through a 50 KM ride.

I implemented RP2040 official minimal design example.

Made my first ESP32.

Made a simple displayer.

First day of 2025.

Booting my new Raspberry Pi Zero 2 W. What should I make? #raspberrypizero #diy #rpizero

A YouTube Short.

I tear down my electric cervical neck massager

A YouTube video.

I tear down my electric cervical neck massager #teardown #massager #diy

A YouTube Short.

I am trying to repair my stuck MacBook key

A YouTube video.

Repair my stuck MacBook key, easy but need practice and patience #macrepair #techrepair #diy

A dated short clip about a stuck MacBook key.

destroyed my wife’s mirror. Fixing it now. Replaced bad battery #fix #mirror #diy #diyrepair

A YouTube Short.

My DIY page turner.

3d print a Batman

The archived photograph shows a flat white bat-emblem-shaped 3D print on a textured printer bed.

migrated my website from #github pages to #cloudflare pages.

Witness the Majestic Qiantang River Tidal Bore: Nature’s Ultimate Spectacle!

Working on my uniorg powered #astrojs website.

Switch from a content consumer to a content creator.

These containers should have gone to many corners of the world.

FreeBSD is my favorite.

Excited to share my first open source contribution!

My first PCB.

my wife’s gift. #sewingmachine 11 pm still happy working

A YouTube Short.

I love Thailand.

@ubuntu try the new autoinstall install method.

Start to practice free talk.

@ollama Awesome, saved my old desktop.

A minimalism diet.

Lazy cat, busy weekend. #cat #weekend #wfh

A YouTube Short.

Making Century Egg.

Making Century Egg. Warping lime now, then wait for the magic of time. #centuryegg #chinesefood

A YouTube Short.

Start running again.

voice input is so great way to input text messages.

I love Emacs org-mode to take notes.

Chinese launch, tomato, eggs and rice. Eat with my big spoon. So delicious. #chinesefood #wfh

A YouTube Short.

My cat snores

A YouTube Short.

Planned a 65.5-kilometer walk from Hangzhou to Zhuji.

Early Bing Chat and ChatGPT experiments: connecting EdgeGPT to Emacs, then relaying…

Early Bing Chat and ChatGPT experiments: connecting EdgeGPT to Emacs, then relaying messages between the two chatbots.

Installing GNU Guix System on a workstation.

Building my ROS robot vehicle.

Working like a professional in an abandoned office at university, trying to learn ROS.

At university, I helped others get this linear actuator moving.

These photos are from a mechanical competition in November 2016.

My first time using an AT89X51 microcontroller.

3 TP-Link Security Cameras

Curiosity teardown note for three TP-Link security cameras: power-on observations, reset and app behavior, internal modules, UART wiring, and hardware design clues.

AI-native website interfaces

An evolving proposal for websites built around AI-readable investigation objects, with the human interface as one view.

Alpine Builder

Historical Alpine Linux image-building work for NanoPi boards, adapted from FriendlyARM’s official builder.

An osmanthus map with evidence, not promises

Nineteen destinations around Hangzhou, Keqiao, Jiaxing and Huzhou, with a real basemap and dated evidence.

Biology diagram source study

Archive record of Racket cell and DNA drawing generators; the recovered SVG outputs are not published on this page.

Books

Browse Chinese classics by title or category and read them in vertical pages with source notes.

Boot evidence and recovery planning

Read a startup sequence as a series of bounded handoffs, using the NanoPi R2S records to separate console, loader, kernel, root filesystem and networking evidence.

Calculus canvas source study

Archive record of TypeScript limit, slope and midpoint-sum studies; no live widget is hosted here.

Cangjie Tree

Archived Cangjie 6 code-prefix tree with character candidates and historical test evidence; current live interaction is unverified.

Cell Field

A restored generative field of hand-drawn cellular forms, preserved for screen and print.

Chemistry

An archived Racket formula parser with recovered element-count examples and seven passing parser and mass-calculation tests.

Coordinating AI tools: access, ideas and evidence

An experiment in complementary AI access and learning through comparison, with demonstrated results, a failed phone route and open questions.

Eight Trigrams

A recovered Racket Bagua drawing declares eight trigram patterns around a central taijitu; its generated SVG was reproduced byte for byte.

Electronic Learning Book Repair

Repair note for a toddler's electronic learning book: inspect the power path, clean the battery compartment, replace batteries, and verify the fix.

Flower Studies

Archived Racket flower drawings with eight recovered programs and eight saved images, including a sunflower built from repeated petals and a golden-angle seed pattern.

FreeBSD

A short personal introduction to FreeBSD: what it is, why I used it, and what stayed with me.

Geologic Clock

Generated deep-time visual study.

Gulangyu Tile Patterns

Twelve geometric studies reconstructed approximately from a Gulangyu staircase photograph.

Hanzi Matrix

Browse the preserved 3,500-character dataset, with pinyin search and recorded character details.

Honglou

Source-to-book typesetting study for a 120-chapter Dream of the Red Chamber edition, with a recorded September 2026 print and mobile release.

How a computer reads a handwritten digit

Draw a digit and follow its real 8×8 pixels through a small neural network to ten probabilities.

Infrastructure

The main site is published from one private repository: GitHub Actions runs Check and Ship, Wrangler uploads one reviewed Worker version, and promotion deploys that same version.

Input Foundry

Independent Rime and Yuanshu keyboard workbench with live previews, downloadable packages, and AI-assisted custom work.

IPA Chart

An interactive IPA reference chart with 14 preserved local audio samples.

LambdaCAD

Archived LambdaCAD experiment with a Racket model parser, CadQuery backend, browser editor, and documented enclosure example.

LeRobot

Early LeRobot training study followed by a separate SO-101 simulation pipeline; documented outcomes are historical, not new hardware tests.

Linux — files, users and permissions

Learn to separate a pathname, a file's metadata and the identity of the process trying to use it, with read-only Ubuntu 24.04 exercises.

Linux — networking and packages

Inspect local addresses, routes, listening sockets and package records on Ubuntu 24.04 without changing network configuration or installing software.

Linux — processes, services and logs

Distinguish a running process, a systemd service and a journal observation before attempting a repair on Ubuntu 24.04.

Linux Disk Layout

Visual map of a GPT-partitioned Linux install disk: EFI, boot, root, swap, home, and backup GPT metadata.

Mahjong

Mahjong was a local four-player draw-and-discard prototype built with Racket.

Mayphus Store

A small, single-merchant commerce project built on Cloudflare, with physical products, private digital downloads and owner administration through AI tools.

Milk Teeth

Archived visual study of primary-tooth eruption, with the original animation schedule distinguished from clinical reference ranges.

Motif

A restored Racket drawing DSL explored through geometric and decorative motifs.

Nano Pi Teardown

Hardware teardown note from the Nano Pi stream: open the enclosure, remove the SD card, inspect RK3328, RAM, Ethernet chips, USB-C, reset, debug pins, and power-management…

Natural Language City Map

A record of a bounded OpenStreetMap query workflow, with a public API that returns map features.

Neon Harbor — Fly & Drive

Fly or drive six vehicles through an original Tokyo-inspired fictional city, with landmark runs and free exploration.

Operating a small service through change

A practical guide to dependencies, provisioning, recovery, migration and handoff, using a fictional service rather than a historical case study.

Origami

Archived origami crease and folding-step concept; this page preserves a text outline.

Paths, filesystems and storage devices

Separate a pathname from its filesystem and underlying device, inspect temporary storage without changing it, and distinguish redundancy from a recoverable backup.

Photos

Gallery of public photos attached to notes.

Polychron

Search and compare 505 preserved Chinese regnal-era records and inspect the complete timeline.

Projectile-motion study

Archive record of a Racket projectile-motion study; its default SVG was reproduced during recovery but is not published here.

Racket Mathematics and 3D

A recovered Racket 3D study combines a damped radial surface and helix, with a preserved plot and a 2,025-vertex OBJ mesh.

Reading a FreeBSD system before changing it

A FreeBSD 15.1 learning path through identity, permissions, packages, processes, services, logs and networking, using read-only observations.

Résumé Builder

A local résumé workspace with editable English and Chinese drafts, shared facts, review checks and Typst PDF exports.

SO-101

A working record from camera-guided MuJoCo learning to agent-assisted physical SO-101 setup, calibration, and fault isolation.

Solar Term Wheel

A recovered Racket wheel renders 24 labelled sectors and seasonal icons; its highlighted term comes from fixed date ranges rather than astronomical calculation.

Starflash

Guided macOS SD and USB image flasher CLI with standalone Ubuntu autoinstall support.

Sudoku

An archived Racket Sudoku solver with a recovered puzzle fixture and nine passing board, candidate and solution tests.

Systems learning starts with an observation

Follow a request across a shell, process and file boundary, then run a disposable file exercise with an explicitly recorded Ubuntu test result.

Tetris

Archived Racket Tetris implementation and cross-language study; this page does not host a playable game.

Trime

Archived Android Rime keyboard-configuration work; no current Trime compatibility or public config download is verified.

Understanding a FreeBSD jail's boundaries

Inspect FreeBSD jail identity and filesystem boundaries, distinguish shared-kernel isolation from a VM, and reason about networking, storage and lifecycle without creating a…

Unicode Map

Archived Unicode browser and inspector study; the launch video preserves the original interface.

Unix Timeline

A preserved Unix lineage chart extended through 2026, with zoom to inspect its branches and labels.

Vertical Book

Earlier traditional Chinese vertical-layout experiment; a later, separate Chinese Book Lab release demonstrates related bookmaking work.

Voronoi diagram study

Archive record of a seven-site Racket drawing; its saved image and source are not published here.

Work with me

Help with GitHub Actions and Cloudflare deployment failures, or a Rime and Yuanshu configuration that fits how you type.

World History Chart

Compare nine selected historical periods on a shared timeline, with dates, qualifications and museum or university sources.

Wuxue speech recognition

A visual guide to the Wuxue speech project: private recordings, LoRA adaptation, evaluation limits, and an original-versus-adapted demo.