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VarBear
 
#SoftwareEngineering #Programming #DevTools
 
 
🔍 Inside this Issue
 
 
Speed demons meet failure modes: 100X workflows, LSM‑tree guts, a DRM takedown—and a smart bed bricked by an AWS sneeze. If moving faster without breaking users is your sport, pull the thread; the details inside are worth it.

🚀 100X Faster: How We Supercharged Netflix Maestro’s Workflow Engine
🗄️ Build Your Own Database
🪝 Discussion of the Benefits and Drawbacks of the Git Pre-Commit Hook
🛏️ Even Your Bed Isn’t Safe from AWS Outages - Eight Sleep Learns the Hard Way
🕵️ How I Reversed Amazon's Kindle Web Obfuscation Because Their App Sucked
📈 Measuring Engineering Productivity
🤖 State of AI Report 2025
🔧 You already have a git server

Keep your stack fast, your hooks sharp, and your fallbacks offline-ready.

Have a great week!
FAUN.dev() Team
 
 
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ℹ️ News, Updates & Announcements
 
faun.dev faun.dev
 
Arkade’s New Off-Chain Protocol Promises Smoother Bitcoin Transactions
 
 
Ark Labs just dropped the public beta of Arkade, a dev platform on the Ark protocol built for offchain Bitcoin payments and batching.

The roadmap? Bigger scripting. Tighter security. More integrations to actually do stuff with Bitcoin beyond hold it and hope.
 
 
faun.dev faun.dev
 
Even Your Bed Isn’t Safe from AWS Outages - Eight Sleep Learns the Hard Way
 
 
An AWS hiccup on Oct 20 knocked out Eight Sleep's smart beds. No heat. No data. Just expensive rectangles. Now they're building an "outage mode" so the beds still work when the cloud flakes out.
 
 
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ClouDNS offers Free DNS zone migration for all new customers!
 
 
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🔗 Stories, Tutorials & Articles
 
yeldirium.de yeldirium.de
 
Discussion of the Benefits and Drawbacks of the Git Pre-Commit Hook
 
 
Pre-commit hooks catch secrets and fix formatting before bad stuff hits your repo. But if they’re clunky or slow, devs bail. Tools like Pre-Commit, Husky, and devenv are trying to fix that. devenv stands out - hooks are baked right into your Nix env, no extra glue scripts.
 
 
stateof.ai stateof.ai
 
State of AI Report 2025
 
 
The 2025 State of AI Report just landed - China’s catching up fast on reasoning and coding. Models like DeepSeek, Qwen, and Kimi are starting to nip at OpenAI’s heels.

AI is thinking longer-term now. Reinforced reasoning and rubric-style feedback are pushing models into deeper, more deliberate planning. Embodied systems? Already moving. Gemini Robotics is out here running “Chain-of-Action” workflows in the real world. Think LLM meets robot arms.

Use is booming too. Forty-four percent of U.S. firms now pay for AI tools. Meanwhile, sovereign-backed multi-gigawatt datacenters are popping up. Scale like that screams industrial era.
 
 
maurycyz.com maurycyz.com
 
You already have a git server
 
 
A plain-old git repo on an SSH-accessible server can double as a lean deployment rig. Drop in some git hooks - like a post-receive - and every push can kick off static site builds or publish code on the spot. No extra tools. Just Git doing Git things.

Turns basic Git infra into a no-frills CI/CD pipeline. Cuts out the middleman.
 
 
justoffbyone.com justoffbyone.com
 
Measuring Engineering Productivity
 
 
A former engineering leader lays out a no-nonsense framework for tracking team output without turning into Big Brother. Think: daily Slack updates, weekly GitHub changelogs, tight 1:1s, demo-fueled All-Hands, and auto-verified deploys. It leans on public artifacts, not peeking over shoulders - and puts the reporting work where it belongs: on managers.
 
 
blog.pixelmelt.dev blog.pixelmelt.dev
 
How I Reversed Amazon's Kindle Web Obfuscation Because Their App Sucked
 
 
A developer cracked Kindle Cloud Reader’s font obfuscation, sidestepping randomized glyph swaps with SVG rendering and SSIM-powered perceptual hashing to rebuild actual EPUBs. Amazon rotates font mappings every five pages, using finicky micro-paths to jam scrapers and derail OCR. It wasn’t enough.

System shift: DRM is getting messier. Text scraping is out. Image parsing is the new game.
 
 
netflixtechblog.com netflixtechblog.com
 
100X Faster: How We Supercharged Netflix Maestro’s Workflow Engine
 
 
The Maestro engine has been revamped for jaw-dropping improvement: a speed boost of 100X with overhead slashed from seconds to milliseconds. The groundbreaking redesign delivers massive performance gains, solving past workflow development hurdles and elevating user experiences sky-high!
 
 
nan.fyi nan.fyi
 
Build Your Own Database   ✅
 
 
LSM trees fix the mess naive key-value stores run into. They blend in-memory sorted indexes with append-only disk files to keep things snappy. Writes get logged, not scattered. Reads stay fast. When files pile up, compaction and segmenting kick in to keep storage lean.

This is a rewrite of the storage playbook. LSM trees lean hard into write performance and memory smarts. Systems like LevelDB and DynamoDB run on them for a reason: scale demands it.
 
 

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⚙️ Tools, Apps & Software
 
github.com github.com
 
CodebuffAI/codebuff
 
 
Generate code from the terminal!
 
 
github.com github.com
 
Michael-A-Kuykendall/shimmy
 
 
Python-free Rust inference server - OpenAI-API compatible. GGUF + SafeTensors, hot model swap, auto-discovery, single binary.
 
 
github.com github.com
 
Shubhamsaboo/awesome-llm-apps
 
 
Collection of awesome LLM apps with AI Agents and RAG using OpenAI, Anthropic, Gemini and opensource models.
 
 
github.com github.com
 
Zie619/n8n-workflows
 
 
A professionally organized collection of 2,057 n8n workflows with a lightning-fast documentation system that provides instant search, analysis, and browsing capabilities.
 
 
github.com github.com
 
AllexVeldman/pyoci
 
 
Publish and install private python packages using OCI/docker registries.
 
 

👉 Spread the word and help developers find and follow your Open Source project by promoting it on FAUN. Get in touch for more information.

 
🤔 Did you know?
 
 
Did you know setting CPU limits in Kubernetes can introduce hidden latency? At the kernel level, the Linux CFS quota uses a default 100 ms period (cpu.cfs_period_us=100 000) and once a container uses up its quota (cpu.cfs_quota_us) it’s throttled for the rest of the window. This means a short burst like a GC pause or TLS handshake could cause a ~100 ms stall - even if your service seems idle.
 
 
😂 Meme of the week
 
 
 
 
🤖 Once, SenseiOne Said
 
 
"We chase 'zero config' until the day we need the one knob the vendor didn’t expose. Convenience scales right up to the first exception. If you can't fork it, you don't control it."
— SenseiOne
 

(*) SenseiOne is FAUN.dev’s work-in-progress AI agent

 
👤 This Week's Human
 
 
This Week’s Human is Geoffrey Dayrit, Senior Lead Technical Program Manager, Global Security Services at Lumen Technologies. He leads programs for CMMC 2.0 compliance, GRC, IT asset and vulnerability management, and security audits - standing up a Global Security PMO grounded in the NIST Cybersecurity Framework; previously at S3 Shared Service Solutions, he ran a consortium portfolio with 9 senior executives to deliver concrete member‑experience and process improvements.
 

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❤️ Thanks for reading
 
 
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VarBear #500: Even Your Bed Isn’t Safe from AWS Outages
Legend: ✅ = Editor's Choice / ♻️ = Old but Gold / ⭐ = Promoted / 🔰 = Beginner Friendly

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