Algorithms
↗Building a QR code, one cell at a time
Start with a message. Follow its bytes through error correction, grid placement, and masking. Play the construction, step through each cell, or jump to any stage.
FIELD NOTES
A closer look at the work.
Technical stories grounded in the repositories: the problem, the implementation, and what the code actually shows.
47 stories
Cloud & delivery
↗A deployment is complete when the receipt says so
V39's controller connects repository identity, release evidence, and service access.
Business applications
↗An invitation should grant exactly the work someone needs
Rodeo Operations connects people, assignments, and access without making every user an administrator.
Algorithms
↗A barcode starts with an encoding decision
Data Matrix makes a small image carry structured information. The interesting work happens before the pixels.
Algorithms
↗Recovering data after the symbols change
A small Reed–Solomon example makes error correction tangible.
AI & knowledge
↗A small Rust client with a very specific personality
Crabby Dan is an early command-line AI experiment whose entire request path is easy to inspect.
Hardware
↗Keeping time when the radio is hard to hear
Just a Clock connects a time signal, a real-time clock, and a bright display—and documents how they interfere.
Barcode engineering
↗From text to a verified barcode
Part 1 of 6. Follow the same six characters through QR, Data Matrix and Aztec, then check the rendered images with an independent decoder.
Cloud & delivery
↗Make the next release earn production traffic
A two-instance reference demonstrates deployment as a sequence of verifiable transitions.
Cloud & delivery
↗When infrastructure becomes a frozen contract
AWS Setup preserves how the platform was created while keeping ordinary releases away from provisioning.
Hardware
↗A one-time code you can see across the room
Clockthenticator explores authentication codes on a small embedded display.
Hardware
↗Connecting a physical display to a web experience
A clock and a survey link share an embedded display.
Creative tools
↗Aligning two images one triangle at a time
A small Canvas experiment makes image correspondence visible.
AI & knowledge
↗A dictionary entry as structured data
The Ukrainian dictionary repository makes lexical information available to software.
Cloud & delivery
↗The service collection behind a deployment workflow
A historical repository captures small services, shared utilities, and an earlier delivery model.
Cloud & delivery
↗Turn an address plan into something you can inspect
CIDR planning becomes easier when the ranges, conflicts, and gaps share one model.
Cloud & delivery
↗Give infrastructure actions a visible control surface
CIDR Runner organizes operational capabilities behind explicit HTTP routes.
Developer tools
↗Make a local service workspace observable
DenoBar gives many small development services a shared operational vocabulary.
Developer tools
↗Promote the changes you mean to keep
Dir Diode treats agent workspaces as explicit overlays instead of automatic mirrors.
Algorithms
↗Learning a protocol by implementing its boundary
The service name is TSDB; the inspected implementation is a focused Redis-style data store.
Developer tools
↗A design system that travels with the application
Stokes UI makes shared interface decisions explicit and locally reusable.
Creative tools
↗Music as an editable punch card
Player Piano connects a visual score, browser playback, and a small portable file format.
Algorithms
↗Preserving barcode output through a hosting migration
QR Card moves an existing encoder interface into a restricted service without changing its output.
Creative tools
↗A comic page is a geometry problem—and a writing surface
Inkframe treats panels, gutters, artwork, and lettering as editable parts of one document.
AI & knowledge
↗An answer is only useful if you can inspect its source
The Rules Desk connects retrieval to immutable editions and citation lines.
Algorithms
↗Make a barcode workbench carry its regression evidence
Deno ZXing preserves known encoder behavior while adapting the service boundary.
Creative tools
↗Keep the recording immutable; edit the decisions
Sticher models an audio session as instructions over original recordings.
Creative tools
↗Four animation lanes, one coordinated formation
Forklift Choreography turns motion into an editable score.
AI & knowledge
↗Study the mistakes you were most sure about
AWS Recall combines domain-weighted practice with confidence-aware review.
Business applications
↗Retry a sale without selling it twice
Cashbox treats concurrency and uncertain acknowledgements as normal operating conditions.
Creative tools
↗A tiny reaction clip, with the whole edit staying local
Tinyloop turns a short moment into an animated GIF without uploading the recording.
Business applications
↗Keep the source statement next to the scenario
Evidence Ledger separates original evidence from editable planning state.
Cloud & delivery
↗An operations workspace should know when it has no authority
Extracting a local AWS tool means preserving its interface while making its hosted limits explicit.
AI & knowledge
↗Move a learning toolkit without hiding its dependencies
The hosted learning category preserves useful workflows and identifies the adapters still required.
Creative tools
↗A soundboard in the browser has different powers from a desktop
The operations category adapts media tools to a narrower hosted environment.
Developer tools
↗Name a deployment tool by what it can actually do
The hosted deployment category currently exposes a navigation service, with a narrow runtime contract.
Developer tools
↗A migration can preserve a category before it has a runtime adapter
Reference Workspace is a useful example of documenting what a package contains—and what it does not yet expose.
Business applications
↗Move the document workflow, keep the documents private
The household category shows how a local file-oriented tool can be adapted to hosted storage.
Creative tools
↗One workspace, several kinds of creative document
The creative category connects focused tools through a common hosted contract.
AI & knowledge
↗Keep saved media useful when processing is unavailable
The subscriptions category draws a clear line between browsing retained work and running external media jobs.
Business applications
↗Give a personal workflow its own service boundary
The application workspace extracts a focused workflow from a larger local toolkit.
Cloud & delivery
↗Three sites, one AWS platform
How stokes91.com, forit.us, and cgrarodeo.v39.us share a load balancer and a blue/green deployment system while keeping publishing access, hostnames, and HTTPS behavior distinct.
Barcode engineering
↗How QR turns character pairs into a masked symbol
Part 2 of 6. Encode ABC123 as alphanumeric pairs, add parity, place the bits and inspect the selected mask.
Barcode engineering
↗How Data Matrix packs triples and places codewords
Part 3 of 6. Work through C40 arithmetic, Reed–Solomon parity, Utah patterns and the dimensions needed to render the entire symbol.
Barcode engineering
↗How Aztec builds words around a central finder
Part 4 of 6. Trace mode choices, six-bit data words, two kinds of parity and the layers surrounding Aztec’s bullseye.
Barcode engineering
↗How module coordinates become GIF pixels
Part 5 of 6. Render the encoders’ coordinates, preserve their geometry and inspect the image bytes that an independent reader actually sees.
Barcode engineering
↗What independent decoding proves and where the encoder fails
Part 6 of 6. Reproduce 23 successful round trips, inspect five failing edge cases and separate image fidelity from message correctness.