US Slams Door On Foreign Home Routers!

The way CTRL-C in Postgres CLI cancels queries is incredibly hack-y

Key Points

• psql sends CancelRequest out-of-band and currently in plaintext, even under strict TLS.
• libpq (since PostgreSQL 17) supports TLS-encrypted cancellations; some drivers already use it.
• Protocol v3.2 introduces longer cancellation keys to reduce brute-force risk; psql refactor is pending.

World Cup Trophy Theft: Gangsters, Spies and the Dog That Found It

Key Points

• The trophy vanished from Westminster Hall on March 20, 1966, between two guard checks.
• It was recovered a week later in Upper Norwood, south London, by the dog Pickles.
• The article suggests the incident involved more than the recovery, hinting at wider criminal and security dimensions.

Plane and ground vehicle collide at New York's LaGuardia airport halting flights

Key Points

• FAA imposes ground stop at LaGuardia after plane–vehicle collision
• CRJ 900 with 76 people onboard sustains significant damage; injuries reported
• NTSB launches investigation; NYPD/FDNY warn of closures and delays

AI Proteomics Competition 2026 – $13K Prize, Internships and Compute Support

Key Points

• Inaugural challenge centers on PSM rescoring to improve proteomics data reliability.
• Two tracks handle ~45M and ~300M PSMs, each with independent awards (¥90,000 total).
• Preprocessed annotated DDA datasets in Parquet format streamline participation.

Walmart: ChatGPT checkout converted 3x worse than website

Key Points

• Walmart found in-chat ChatGPT purchases converted at one-third the rate of website click-throughs.
• OpenAI is retiring Instant Checkout in favor of merchant-handled app-based checkout.
• Walmart will integrate its Sparky chatbot into ChatGPT while keeping checkout within Walmart’s system.

POSSE – Publish on your Own Site, Syndicate Elsewhere

Key Points

• Publish first on your site, then syndicate with links back to the original (POSSE).
• Maintain canonical URLs and ownership; avoid PESOS’s third‑party dependence.
• Use permashortlinks and backfeed to enhance discovery and consolidate responses.

Show HN: The King Wen Permutation: [52, 10, 2]

Key Points

• Permutation between binary and King Wen orders has cycle lengths [52, 10, 2].
• No fixed points; 81% of hexagrams are in the 52-cycle.
• Claimed to be previously unreported in the literature.

White-Collar AI Apocalypse Narrative Is Just Another Bullshit

Key Points

• Customer support employment has rebounded toward pre‑Covid levels despite AI capability claims.
• LLM+RAG systems can automate many routine cases, but exception handling dominates cost and effort.
• Semi‑decidable work and long‑tail cases limit full automation by current tools.

Show HN: Agent Kernel – Three Markdown files that make any AI agent stateful

Key Points

• Three Markdown files plus a Git repo provide persistent memory for AI coding agents.
• Two-tier memory model: mutable knowledge and append-only session notes.
• Works with multiple agents and tools; each agent runs in its own repository.

A Bilingual Localization for Pillars of Eternity (EN and ZH)

Key Points

• Bilingual display (EN + ZH) preserves tone and supports comprehension in a text-heavy CRPG.
• The idea traces back to a 2015 Obsidian forum post advocating side-by-side language presentation.
• Scale and literary nuance were the main obstacles: thousands of strings across base and expansions.

Dataframe 1.0.0.0

Key Points

• New DataFrame.Typed API ensures compile-time schema safety
• Arrow C Data interface enables Haskell–Python (Polars) interoperability
• Lazy engine handles out-of-memory datasets and hits 1BRC benchmark times

I Built an AI Receptionist for a Luxury Mechanic Shop – Part 1

Key Points

• RAG-based knowledge system using Voyage AI embeddings and MongoDB Atlas vector search ensures grounded answers.
• Anthropic Claude generates concise, policy-constrained responses from retrieved documents.
• Vapi integrates telephony with STT (Deepgram), TTS (ElevenLabs), and a FastAPI webhook for real-time calls.

Migrating to the EU

Key Points

• Email moved from Fastmail to Uberspace to retain flexible send‑as and multi‑domain features.
• Calendars/contacts self‑hosted via Nextcloud (CalDAV/CardDAV) with Thunderbird and DAVx5.
• Website and domains migrated to Uberspace and hosting.de, replacing Hetzner VPS and Namecheap.

GitHub appears to be struggling with measly three nines availability

Key Points

• Core GitHub services experienced issues on February 9, with resolution confirmed by 19:29 UTC.
• Copilot had policy propagation problems from Feb 9 to Feb 10, affecting newly enabled models for some users.
• Status transparency changes and unofficial data point to broader reliability concerns; Enterprise Cloud SLA targets 99.9% uptime.

General Motors Is Assisting with the Restoration of a Rare EV1

Key Points

• GM is supplying parts and formal support for EV1 VIN 212’s restoration, announced March 11, 2026.
• Project V212 targets a drivable, public return by November 2026; the team is documenting progress on YouTube.
• GM highlighted the EV1’s foundational technologies and its current EV initiatives (batteries, charging, V2H/V2G).

Jazz CRJ9 at New York on Mar 22nd 2026, collision with fire truck on runway

Key Points

• CRJ-900 landing at LaGuardia collided with a fire truck crossing runway 04.
• Both pilots died; multiple injuries to passengers and firefighters were reported.
• LaGuardia closed; NTSB deployed investigators; NOTAMs and METARs detailed conditions and closures.

Attractive students no longer receive better results as classes moved online

Key Points

• In‑person beauty premium appears in non‑quantitative, interaction‑heavy courses.
• Female beauty premium disappears online; male premium persists.
• Findings suggest discrimination may drive female in‑person grade advantages.

Bombadil: Property-based testing for web UIs by Antithesis

Key Points

• Bombadil is an experimental property-based testing tool for web UIs by Antithesis.
• A fix to the LTL evaluator prevents duplicate violation reports when not using --exit-on-violation.
• Runs across local environments, CI pipelines, and the Antithesis platform.

Fyn: An uv fork with new features, bug fixes, stripped telemetry

Key Points

• Forked from uv, fyn removes telemetry, adds features, and fixes bugs while aiming to replace multiple Python tooling components.
• Provides project management (universal lockfile, task runner), environment activation, dependency upgrades, and script/tool workflows.
• Supports Python version management, pip-compatible interface, workspaces with a global cache, and cross-platform operation.

An Unsolicited Guide to Being a Researcher [pdf]

Key Points

• Prioritize collaboration by avoiding bottlenecks and communicating proactively.
• Keep presentations concise and key-idea focused, with legible results.
• Manage literature by focusing on a niche and building a solid toolbox and network.

Cyberattack on vehicle breathalyzer company leaves drivers stranded in the US

Key Points

• Cyberattack on March 14 has halted Intoxalock’s calibration services, immobilizing some vehicles.
• Impacts reported across multiple states; Intoxalock serves about 150,000 drivers in 46 states.
• No details given on attack type, data exposure, or recovery timeline.

Fear and Fragility: The Glass Delusion and Its History

Key Points

• King Charles VI’s belief that he was made of glass exemplifies the historical syndrome.
• Traumatic events—the 1392 violent episode and the 1393 Bal des Ardents—preceded his delusion.
• Scholarly accounts, including Gill Speak’s 1990 study, document varied forms and geographic spread of the delusion.

If Dspy is so great, why isn't anyone using it?

Key Points

• DSPy shows lower apparent adoption than LangChain but is reportedly used in production by several companies.
• The author argues DSPy’s abstractions are harder to learn, which deters adoption despite benefits.
• A staged example demonstrates how teams evolve from simple prompts to versioned templates and structured outputs.

Study: 'Security Fatigue' May Weaken Digital Defenses

Key Points

• Escalating security demands can cause employee “security fatigue,” leading to disengagement.
• Fatigue is most likely when security tasks impede core job responsibilities.
• Training, simplification, and integrated workflows help maintain compliance despite fatigue.

Wikipedia bans eight editors, six of them anti-Israel

Key Points

• Wikipedia’s Arbitration Committee banned eight editors from Arab-Israeli conflict articles for misconduct, not content disagreements.
• External reports allege coordinated campaigns by some editors to promote pro-Palestinian, pro-Hamas, and pro-Iran narratives on Wikipedia.
• The Anti-Defamation League, recently labeled unreliable on this topic by some editors, welcomed the disciplinary actions and called for broader corrective measures.

Nanopositioning Metrology, Gödel, and Bootstraps

Key Points

• Independent, standards-traceable metrology (e.g., laser interferometry) is required to verify nanopositioning systems.
• Time-domain measurements best capture performance metrics like stability and settling; frequency-domain tests should target resonances with external sensors.
• Practical resolution should be gauged by 1σ of independently measured positional noise (~1/6 peak-to-peak).

Cyber.mil serving file downloads using TLS certificate which expired 3 days ago

Key Points

• Certificate renewal is causing download issues on the DoD Cyber Exchange.
• Civilian-network users can proceed via the browser’s “Advanced” option on the warning page.
• Further assistance is available through topic-specific contacts listed on the Help page.

America tells private firms to "hack back"

Key Points

• U.S. adopts an aggressive new cyber strategy amid Iranian cyber threats.
• Handala claims a major breach of Stryker with extensive data wiping and disruption.
• Iran’s cyber operations often respond to Middle East conflicts, projecting impact into the U.S.

Is it a pint?

Key Points

• Questioning of whether labeled pints contain a full pint led to investigation.
• Findings spurred the creation of Pint Patrol, a grassroots movement.
• The movement seeks honest serving sizes for beer, wine, and cider in the United States.

Show HN: Threadprocs – executables sharing one address space (0-copy pointers)

Key Points

• Shared address space enables zero-copy pointer sharing across executables.
• libtproc provides auxv-based scratch space for discovery and IPC bootstrapping.
• Supports Linux (aarch64/x86_64) with clear build, test, and usage instructions.

Side-Effectful Expressions in C (2023)

Key Points

• C’s assignment expressions and pre/post-increment/decrement are criticized as side-effectful constructs that harm clarity.
• An implicit narrowing from uint64_t to uint16_t compiles without warnings under clang -Wall, highlighting a safety issue.
• The article argues computations fit expression trees, while side effects should be expressed as ordered sequences.

Orbán's top opponent says Hungary's alleged Russian backchannel 'treason'

Key Points

• Hungarian opposition leader Péter Magyar calls alleged sharing of EU Council details with Russia “treason” and demands an investigation.
• A Washington Post report alleges Foreign Minister Péter Szijjártó gave Russia live updates from EU meetings and has visited Moscow 16 times since 2022.
• Prime Minister Viktor Orbán orders a probe into alleged wiretapping, while the European Commission and Poland’s prime minister seek clarifications and highlight long-standing concerns.

Trivy under attack again: Widespread GitHub Actions tag compromise secrets

Key Points

• 75 version tags in aquasecurity/trivy-action were force-pushed to malicious commits, impacting many GitHub workflows.
• Payload exfiltrates CI/CD secrets; only tag @0.35.0 is confirmed unaffected at reporting time.
• Maintainers attribute the breach to residual access from earlier compromised credentials despite rotation.

BIO: The Bao I/O Coprocessor

Key Points

• BIO is introduced as the I/O co-processor inside the Baochip-1x SoC, with practical code examples.
• An RP2040-generation PIO clone on FPGA showed high resource use and timing issues versus a VexRiscv CPU core.
• PIO’s powerful, complex instructions contribute to long critical paths, motivating BIO’s architectural strategy.

Unix philosophy is dead Long live something else?

Key Points

• The UNIX philosophy is shown as fragmented and inconsistently defined across time and practitioners.
• Core UNIX utilities like `cat`, `sed`, and `grep` exemplify how real tools deviate from the minimalist “one thing well” ideal.
• Modern usage trends favor large, multi-purpose tools and even compiled languages for tasks once handled by shell scripts.

Digs: Offline-first iOS app to browse your Discogs vinyl collection

Key Points

• Offline-first iOS app that syncs and browses Discogs collections by folders with incremental updates.
• Local-first stack: React Native/Expo, TypeScript, SQLite + Drizzle, OAuth via Discogs API, iOS Keychain.
• Custom token-bucket rate limiter handles Discogs’ 60 RPM constraint; app is free with no ads/tracking.

Coke fires worker injured on the job, keeping him would be hard on the company

Key Points

• Company cited “frustration of employment” to terminate an injured 35-year employee due to alleged undue hardship.
• Worker reports severe injury from a malfunctioning 907 kg door after prior warnings; benefits were cut and no severance was provided.
• Coca-Cola Canada Bottling is a large, independent firm with a new $75M AI-enabled Calgary facility, prompting questions about accommodation capacity.

The quadratic problem nobody fixed

Key Points

• Linear-time promises apply to single matches; iterating all matches can be O(m·n²).
• Rust regex docs acknowledge the issue and suggest early-exit as a mitigation.
• Benchmarks confirm worst-case quadratic scaling in RE2, Go, and Rust engines.

I tried Karpathy's Autoresearch on an old research project

Key Points

• Constrained LLM-driven loop edited train.py under a structured program with quick iterations.
• Used Ukiyo-eVG dataset with heatmap inputs; CLIP-based model (~90M params) on RTX 4090.
• Achieved ~54% reduction in mean rank over 42 experiments in a single day.

The machine didn't take your craft. You gave it up

Key Points

• The article argues that new tools and machines do not inherently remove a person’s love for their craft; they reveal existing priorities and values.
• It critiques Marx’s concept of alienation, claiming it denies the individual’s role as the ultimate authority over their relationship to work.
• Modern concerns about AI tools like LLMs displacing developers are framed as a general tension between what people enjoy and what the market rewards.

Local Stack Archived their GitHub repo and requires an account to run

Key Points

• Repository archived and development consolidated into one unified image.
• Free non‑commercial Hobby plan in LocalStack for AWS matches the archived project’s capabilities.
• Run and manage LocalStack via the CLI and Docker; install awslocal for service interactions.

Anchor: Hardware-based authentication using SanDisk USB devices

Key Points

• Uses SanDisk USB devices as a hardware factor for authentication
• Grants database access only when an authorized device is connected
• Repository is available on GitHub for download and review

AI Risks "Hypernormal" Science

Key Points

• AI’s strength in prediction risks reinforcing existing frameworks, not replacing them.
• Historical examples show new representations can be more valuable than more detail.
• Building AI that proposes new conceptual vocabularies is presented as a remedy.

An Incoherent Rust

Key Points

• Rust’s coherence and orphan rules limit trait implementations, affecting how crates interoperate.
• Foundational crates like serde become entrenched because alternatives require widespread additional support.
• Coherence prevents conflicting impls, illustrated by compiler errors and a HashSet example.

California sheriff running for governor seizes >650k 2025 election ballots

Key Points

• Sheriff Chad Bianco seized more than 650,000 ballots from California’s 2025 election to investigate alleged irregularities in Proposition 50 voting.
• State officials, including attorney general Rob Bonta, say there is no evidence of widespread voter fraud and report only a 103-vote discrepancy.
• A court-appointed special master will oversee a physical recount of the seized ballots amid warnings that the move could erode trust in elections.

American Aviation Is Near Collapse

Key Points

• Unpaid TSA staff during a partial DHS shutdown fueled long security lines at major airports.
• A collision at LaGuardia halted flights and caused widespread cancellations, with knock-on effects regionally.
• Outdated, understaffed ATC systems and regulatory lapses are cited as systemic contributors to recent incidents.

Dune3d: A parametric 3D CAD application

Key Points

• Parametric 3D CAD with STEP, fillets, and chamfers
• Built on Open CASCADE and Solvespace’s solver, with performance patches
• Cross-platform builds, docs, samples, and community support available

Bets on US-Iran ceasefire show signs of insider knowledge, say experts

Key Points

• New wallets placed concentrated bets on a US–Iran ceasefire, echoing past timely wagers.
• Polymarket odds spiked, with over $21 million wagered on the outcome.
• Resolution requires public confirmation from both the US and Iran for a “Yes” outcome.

How I'm Productive with Claude Code

Key Points

• Automated PR creation via a Claude Code /git-pr skill reduced manual effort and context switching.
• Switching to SWC enabled sub-second server restarts, improving iteration speed and focus.
• Unique port ranges per Git worktree enabled parallel previews and multi-branch development.

The Minimalist Entrepreneur – Claude Code Skills

Key Points

• A Claude Code plugin provides command-based skills aligned with the stages in *The Minimalist Entrepreneur* framework.
• Installation is done via cloning a GitHub repository and installing it as a plugin in Claude Code.
• The skills cover the full journey from finding community and validating ideas to building, selling, pricing, marketing, growing, and defining company culture.

The Treasury just declared the U.S. insolvent

Key Points

• FY2025: $6.06T assets vs. $47.78T liabilities; net position -$41.72T (excl. social insurance).
• 75-year unfunded social insurance obligations rose to $88.4T; fiscal gap widened to 4.7% of GDP.
• GAO again issued a disclaimer of opinion; proposals include H.R. 3289 and an Article V Convention.

Conway's Game of Life, in real life

Key Points

• 17×17 LED/switch matrix driven by an AVR128DA64 with multiplexed rows/columns
• High‑current LED pulsing (~150 mA per LED) with MOSFET drivers and 20 Ω resistors
• Firmware safety: blackout‑window updates and watchdog reset (~15 ms)

Flipper Zero gets an AI upgrade

Key Points

• V3SP3R brings an AI chatbot interface to Flipper Zero via an Android app compiled from GitHub.
• The AI automates technical tasks and includes user confirmation safeguards for risky actions.
• Early community response on Reddit is tepid; no iOS version is available.

Printable Claude Code Cheat Sheet (auto-updated daily)

Key Points

• Version v2.1.81 adds --bare, preview --channels, effort frontmatter, and /fork→/branch.
• MCP servers support HTTP/stdio/SSE, with interactive management via /mcp.
• Memory (CLAUDE.md), Git worktrees, and context/voice features streamline developer workflows.

Next-generation electricity is almost here

Key Points

• TerraPower gains U.S. approval to build an advanced nuclear reactor in Wyoming.
• Fervo’s enhanced geothermal shows sustained output; Utah plant expected online this year.
• Fusion efforts progress via tokamak and stellarator projects, with key milestones approaching.

The machine didn't take your craft. You gave it up.

Key Points

• Tools change incentives but do not inherently remove one’s passion for craft.
• The article critiques Marx’s alienation concept and emphasizes individual agency.
• Modern feelings of being “pushed away from coding” are framed as market-choice tensions.

FCC adds "routers produced in foreign countries" to covered list [pdf]

Key Points

• Routers produced in foreign countries have been added to the FCC Covered List.
• Action follows a March 20, 2026 National Security Determination by an interagency body.
• Cited risks include supply chain vulnerabilities and severe cybersecurity threats to U.S. infrastructure.

Hacker Mints $80M USD Worth of USR Stablecoins

Key Points

• At least $80M in unbacked USR was minted via a smart contract exploit.
• About $25M was siphoned and converted to ETH; ~$55M was contained by the protocol.
• USR de-pegged sharply, with prices reported as low as $0.025 and around $0.20 within 24 hours.

Ju Ci (锔瓷): The Ancient Art of Repairing Porcelain

Key Points

• Ju ci dates back to the Song dynasty and is depicted in 13th-century Chinese art.
• UNESCO recognizes Ju ci as intangible cultural heritage.
• The technique uses drilled holes and metal staples to repair and reinforce broken porcelain.

Show HN: Cq – Stack Overflow for AI coding agents

Key Points

• Mozilla AI proposes “cq,” a shared knowledge base for AI agents modeled on Stack Overflow.
• Stack Overflow’s usage decline amid LLM adoption is cited as motivation for agent-focused knowledge sharing.
• The post advocates for open, standardized, sustainable approaches as agents evolve.

A retro terminal music player inspired by Winamp

Key Points

• Terminal-based music player with visualizers, EQ, and playlist features
• Wide source support: local files, streams, major platforms, and Navidrome
• Multiple install paths and radio features, plus extensive documentation

Windows 3.1 tiled background .bmp archive

Key Points

• Archive of original Windows 3.1 tiled background .bmp images
• Gallery view shows each pattern as a seamless tile
• Resource for preservation, reference, and reuse of classic UI assets

IRIX 3dfx Voodoo driver and glide2x IRIX port

Key Points

• SST1 (Voodoo1) support on SGI O2 (IP32) under IRIX 6.5.30 is demonstrated.
• Driver, Glide port, and hinv tool sources are available on GitHub.
• Logs and tests confirm device mapping and basic rendering at 640x480.

Talking Liquid Glass with Apple

Key Points

• Apple hosted a three-day Liquid Glass workshop in NYC with hands-on support from Developer Relations and a SwiftUI engineer.
• The author concludes Liquid Glass is a permanent design direction following discussions at the workshop.
• The piece contrasts past WWDC formats with current, smaller workshops as more useful for day-to-day engineering.

Pentagon Adopts New Limits for Journalists After Court Loss

Key Points

• Pentagon to close internal press workspace and move access to an outside annex.
• Escorts now required for all journalists entering the Pentagon.
• Credential rules to be revised with clearer definitions after court ruling.

No, Windows Start does not use React

Key Points

• The Start menu is not built with React; reports conflated technologies.
• Only the Recommended section uses React Native for Windows, calling WinUI 3 without a webview.
• Settings is not web-based; these choices predate recent AI changes.

Abusing Customizable Selects

Key Points

• Opt in to customizable selects with ::picker() and appearance: base-select.
• Options can include nested HTML for richer, stylable labels.
• Graceful fallback ensures standard selects in non-supporting browsers.

AI boom risks widening wealth divide, says BlackRock's Larry Fink

Key Points

• Fink warns AI could widen inequality by concentrating gains among a few firms and investors.
• Market risk concerns include potential corrections tied to soaring AI valuations, per the Bank of England.
• He urges broader participation in capital markets over homeownership to share in future growth.

Study: Workers who fall for 'corporate bullshit' may be worse at their jobs

Key Points

• Employees impressed by corporate jargon showed lower analytical thinking, reflection, and fluid intelligence.
• Researchers used a custom “corporate bullshit generator” mixed with real executive quotes to test responses.
• Findings, drawn from four studies with 1,000 office workers, link jargon susceptibility to poorer decisions.

I Created My First AI-Assisted Pull Request and I Feel Like a Fraud

Key Points

• AI-assisted PR added ERB syntax highlighting to Chroma for Hugo and was merged.
• The author felt impostor syndrome and reduced enjoyment despite delivering value.
• AI use is expected at work, emphasizing speed and outcomes over craftsmanship.

Epoch confirms GPT5.4 Pro solved a Frontier Math Open Problem for the first time

Key Points

• GPT‑5.4 Pro enabled the first elicited solution; confirmation and publication write‑up are planned.
• A new testing scaffold showed multiple models can solve the problem.
• The problem targets improved lower bounds for H(n) via hypergraph constructions with specified constraints.

TI-89 Height-Mapped Raycaster

Key Points

• Height‑mapped raycaster and procedural dungeon crawler for TI‑89 built on the 2002 FAT Engine.
• Standard TI‑89 supports full textured/sprite engine; Titanium requires standalone flat‑shaded build.
• Dockerized GCC4TI toolchain, libusb transfer tools, and additional optimized demos are provided.

US bans new foreign-made consumer Internet routers

Key Points

• New foreign-made consumer routers require FCC approval to be imported or sold in the U.S.
• Manufacturers must disclose foreign ties and plan to shift production to the U.S.
• Possible DoD/DHS exceptions exist, but none are currently listed.

Sunsetting the Techempower Framework Benchmarks

Key Points

• Project has been sunset and repository archived on Mar 24, 2026.
• Benchmarks ran for over a decade with 20+ result rounds covering many languages.
• Past results and history remain available for reference.

Box of Secrets: Discreetly modding an apartment intercom with Matter

Key Points

• Default admin credentials and an unlocked enclosure exposed the intercom’s router.
• A configuration export on a NetComm-based router allowed resetting root access.
• The project aims to link the DoorKing intercom with Apple Home, with further steps implied but not shown.

Gerd Faltings, who proved the Mordell conjecture, wins the Abel Prize

Key Points

• Gerd Faltings wins the Abel Prize for proving the Mordell conjecture in 1983.
• Faltings’s theorem shows finiteness of rational points on higher-degree curves, foundational to arithmetic geometry.
• Faltings extended his results in 1991 and contributed to p-adic Hodge theory; the selection committee praised his towering impact.

Cuba's Fragile Power Grid Finds a Powerful New Partner

Key Points

• China is boosting Cuba’s renewable build-out with solar exports, nearly 100 solar parks by 2028, and the La Herradura 1 wind farm.
• Cuba’s grid failure followed a weekslong U.S. oil blockade; power was restored after about 29–30 hours.
• Cuba’s transition needs an estimated $8–$10 billion over the next decade, far beyond current domestic resources.

BIO – The Bao I/O Co-Processor

Key Points

• BIO is the Baochip-1x I/O co-processor; the article covers its design and programming examples.
• Raspberry Pi’s PIO is dissected as a reference, including its minimal-instruction SPI capability.
• FPGA analysis shows PIO’s high resource use and long critical paths, informing BIO’s design choices.