Devdigest - Tech News & Insights

JavaScript Event Loop: Microtasks Always Beat Macrotasks

The event loop's single rule—drain microtasks before taking the next macrotask—explains every surprising async ordering. This guide walks through the call stack, Web APIs, and queues, with concrete examples of setTimeout, Promise, and async/await behavior.

5 min read·about 5 hours ago

Anthropic Study: AI Assistants Hinder Junior Devs From Learning Debugging

Developer Tools

Trending

Anthropic Study: AI Assistants Hinder Junior Devs From Learning Debugging

A randomized controlled trial by Anthropic researchers found that junior software engineers using an AI assistant learned less and performed worse on debugging tasks compared to those coding by hand. The study coins the term 'never-skilling' to describe novices who fail to develop critical skills due to AI reliance.

3 min read·about 7 hours ago

In-Kernel L7 Firewall with eBPF Hits 200ns Decisions

Cybersecurity

Trending

In-Kernel L7 Firewall with eBPF Hits 200ns Decisions

A new firewall from the yeet.cx team runs HTTP/2 header matching in the kernel using eBPF and Aho-Corasick automata, achieving sub-microsecond decisions. It handles HPACK dynamic tables and allows policy changes via git push without restarts.

5 min read·about 8 hours ago

Mass Assignment Vulnerabilities: How One JSON Field Hands Attackers Admin Access

Cybersecurity

Trending

Mass Assignment Vulnerabilities: How One JSON Field Hands Attackers Admin Access

Mass assignment vulnerabilities let attackers inject unauthorized fields into API requests, leading to privilege escalation, data corruption, and multi-tenancy bypass. The article explains the attack, the GitHub 2012 incident, and three concrete defensive layers using Zod, typed DTOs, and readonly fields.

4 min read·about 11 hours ago

Zephyr Cloud's Bug-Hunting Agent Runs 24/7, Finds Silent Failures

Developer Tools

Trending

Zephyr Cloud's Bug-Hunting Agent Runs 24/7, Finds Silent Failures

A two-agent system hunts bugs in a real desktop app every hour, filing high-confidence issues and even fixing them. The key insight: making the agent honest about what it found, rather than just prolific.

5 min read·about 12 hours ago

KiCad and JLCPCB: My First Custom PCB Assembly

Developer Tools

Trending

KiCad and JLCPCB: My First Custom PCB Assembly

A developer recounts designing a BME280 sensor module PCB using KiCad, ordering from JLCPCB, and hand-assembling it with a Hakko iron and Quick hot air station. The board worked on first try, demonstrating a complete end-to-end custom PCB workflow.

3 min read·about 13 hours ago

Shadowaudit 0.1.0: CLI catches undocumented Express.js routes in CI

Developer Tools

Trending

Shadowaudit 0.1.0: CLI catches undocumented Express.js routes in CI

Shadowaudit is a static analysis CLI that scans Express.js codebases for undocumented and unauthenticated routes before they merge to production. It compares actual route definitions against OpenAPI specs and fails CI pipelines on critical findings.

5 min read·about 15 hours ago

Trending

Express Plumbing, Error Handling & Node Internals Explained

This article explains Express middleware like express.json(), cookie-parser, and Router, plus error handling patterns including async errors, error middleware, and unhandled rejections. It's part 4 of a series on Node.js internals.

4 min read·about 15 hours ago

Buf Releases protobuf-py: Full Protobuf Spec, Pure Python, Rust Accelerator

Developer Tools

Trending

Buf Releases protobuf-py: Full Protobuf Spec, Pure Python, Rust Accelerator

Buf announces protobuf-py, a complete Protocol Buffers library for Python written from scratch. It passes the entire Protobuf conformance suite, generates readable typed Python, has no runtime dependencies, and optionally uses a Rust accelerator to match C-based upb performance in production workloads.

5 min read·1 day ago

EF Core 11 Prunes Redundant Joins in Split Queries

Developer Tools

Trending

EF Core 11 Prunes Redundant Joins in Split Queries

EF Core 11 preview 3 optimizes AsSplitQuery by removing unnecessary JOINs and ORDER BY columns from collection queries, cutting runtime by ~9.5% and allocations by ~9.6% in benchmarks.

3 min read·1 day ago

100 Lines of Lisp: An AI Agent That Writes Its Own Tools

Artificial Intelligence

Trending

100 Lines of Lisp: An AI Agent That Writes Its Own Tools

An 8-line recursive agent loop in Common Lisp, backed by a single eval-based tool, lets an LLM write and execute arbitrary code at runtime—including building its own web search function from scratch. The post revives Lisp's symbolic AI roots for modern agent architectures.

4 min read·1 day ago

Trending

UPI Payment Architecture: Inside the 2,272 Crore Transaction Pipeline

A deep dive into the hidden architecture of India's UPI payment system, which processed 2,272 crore transactions in June 2026. We trace a single payment from the app through sponsor banks, the NPCI switch, and the payee's bank, revealing why some banks dominate receiving and why technical failures are now rarer than business declines.

4 min read·1 day ago

Biff.graph: Query Your Clojure Codebase as a Unified Graph

Developer Tools

Trending

Biff.graph: Query Your Clojure Codebase as a Unified Graph

biff.graph is a lightweight (~600 lines) Clojure library that lets you query your database and business logic as a single, extendable graph. It's a simpler alternative to Pathom, designed to be easier to understand while still supporting batch resolvers and caching. Version 2.0.0-rc7 is available now as part of the Biff framework.

3 min read·1 day ago

Trending

Igropyr: Erlang-Style Actor Web Server in Pure Chez Scheme

Igropyr is a web server written in pure Chez Scheme that implements Erlang-style actors, fault tolerance via supervisors, hot code swapping, and conversation continuations for multi-request dialogues. It achieves ~35k req/s on a laptop with zero-downtime deployments and structured fault reporting to clients.

4 min read·1 day ago

Simple Fluids Can Fracture: New Physics for Engineers

Developer Tools

Trending

Simple Fluids Can Fracture: New Physics for Engineers

Researchers at Drexel University discovered that simple, non-elastic fluids like hydrocarbon blends can undergo brittle fracture under extensional stress, challenging long-held assumptions in fluid mechanics. The cracks propagate at 500-1500 m/s, far faster than in complex fluids, and occur at a critical stress of 2 megapascals.

3 min read·2 days ago

xAI Grok CLI 0.2.93 Uploads Secrets and Whole Repo Unredacted

Artificial Intelligence

Trending

xAI Grok CLI 0.2.93 Uploads Secrets and Whole Repo Unredacted

A wire-level analysis of xAI's Grok Build CLI reveals it transmits file contents, including .env secrets, to xAI's servers unredacted. The tool also uploads the entire repository as a git bundle to Google Cloud Storage, even when the agent is told not to read files. Disabling "Improve the model" does not stop the uploads.

3 min read·2 days ago

Trending

ZeroFS vs. S3 Files: POSIX on Object Storage, Differing Trade-offs

Amazon S3 Files and ZeroFS both mount POSIX filesystems on object storage, but diverge radically in storage layout, cost, and S3 API visibility. S3 Files preserves one-file-one-object mapping with async export; ZeroFS packs, compresses, and encrypts data into opaque segments, trading direct S3 access for efficiency and client-side encryption.

4 min read·2 days ago

Trending

Stop Storing JWTs in localStorage: The Secure Way

Storing JWT tokens in localStorage is vulnerable to XSS. The article compares memory storage, httpOnly cookies, and refresh token patterns, concluding that httpOnly cookies with CSRF protection are the most secure approach for web apps.

3 min read·3 days ago

Trending

China's Long March 10B First Flight: Net-Catch Booster Recovery

China's CASC successfully recovered the first stage of its Long March 10B rocket using a net-based catch system on an offshore vessel. This marks the third enterprise (after SpaceX and Blue Origin) to achieve orbital-class booster recovery, using a novel approach that reduces payload penalties.

3 min read·3 days ago

Trending

Cloud Run CPU Throttling: Why Background Tasks Freeze After Response

On Cloud Run's default request-based CPU mode, post-response background tasks freeze until the next request arrives. This article explains the root cause, how to diagnose it by injecting traffic, and the fix: move latency-critical work inline or switch to instance-based CPU allocation.

5 min read·3 days ago

The Signal in the Noise

The Signal in the Noise

JavaScript Event Loop: Microtasks Always Beat Macrotasks

Anthropic Study: AI Assistants Hinder Junior Devs From Learning Debugging

In-Kernel L7 Firewall with eBPF Hits 200ns Decisions

Mass Assignment Vulnerabilities: How One JSON Field Hands Attackers Admin Access

Zephyr Cloud's Bug-Hunting Agent Runs 24/7, Finds Silent Failures

Trending Now

KiCad and JLCPCB: My First Custom PCB Assembly

Shadowaudit 0.1.0: CLI catches undocumented Express.js routes in CI

Express Plumbing, Error Handling & Node Internals Explained

Buf Releases protobuf-py: Full Protobuf Spec, Pure Python, Rust Accelerator

100 Lines of Lisp: An AI Agent That Writes Its Own Tools

EF Core 11 Prunes Redundant Joins in Split Queries

Latest Articles

JavaScript Event Loop: Microtasks Always Beat Macrotasks

Anthropic Study: AI Assistants Hinder Junior Devs From Learning Debugging

In-Kernel L7 Firewall with eBPF Hits 200ns Decisions

Mass Assignment Vulnerabilities: How One JSON Field Hands Attackers Admin Access

Zephyr Cloud's Bug-Hunting Agent Runs 24/7, Finds Silent Failures

KiCad and JLCPCB: My First Custom PCB Assembly

Shadowaudit 0.1.0: CLI catches undocumented Express.js routes in CI

Express Plumbing, Error Handling & Node Internals Explained

Buf Releases protobuf-py: Full Protobuf Spec, Pure Python, Rust Accelerator

EF Core 11 Prunes Redundant Joins in Split Queries

100 Lines of Lisp: An AI Agent That Writes Its Own Tools

UPI Payment Architecture: Inside the 2,272 Crore Transaction Pipeline

Biff.graph: Query Your Clojure Codebase as a Unified Graph

Igropyr: Erlang-Style Actor Web Server in Pure Chez Scheme

Simple Fluids Can Fracture: New Physics for Engineers

xAI Grok CLI 0.2.93 Uploads Secrets and Whole Repo Unredacted

ZeroFS vs. S3 Files: POSIX on Object Storage, Differing Trade-offs

Stop Storing JWTs in localStorage: The Secure Way

China's Long March 10B First Flight: Net-Catch Booster Recovery

Cloud Run CPU Throttling: Why Background Tasks Freeze After Response

JavaScript Event Loop: Microtasks Always Beat Macrotasks

Anthropic Study: AI Assistants Hinder Junior Devs From Learning Debugging

In-Kernel L7 Firewall with eBPF Hits 200ns Decisions

Mass Assignment Vulnerabilities: How One JSON Field Hands Attackers Admin Access

Zephyr Cloud's Bug-Hunting Agent Runs 24/7, Finds Silent Failures

Trending Now

KiCad and JLCPCB: My First Custom PCB Assembly

Shadowaudit 0.1.0: CLI catches undocumented Express.js routes in CI

Express Plumbing, Error Handling & Node Internals Explained

Buf Releases protobuf-py: Full Protobuf Spec, Pure Python, Rust Accelerator

100 Lines of Lisp: An AI Agent That Writes Its Own Tools

EF Core 11 Prunes Redundant Joins in Split Queries

Latest Articles

JavaScript Event Loop: Microtasks Always Beat Macrotasks

Anthropic Study: AI Assistants Hinder Junior Devs From Learning Debugging

In-Kernel L7 Firewall with eBPF Hits 200ns Decisions

Mass Assignment Vulnerabilities: How One JSON Field Hands Attackers Admin Access

Zephyr Cloud's Bug-Hunting Agent Runs 24/7, Finds Silent Failures

KiCad and JLCPCB: My First Custom PCB Assembly

Shadowaudit 0.1.0: CLI catches undocumented Express.js routes in CI

Express Plumbing, Error Handling & Node Internals Explained

Buf Releases protobuf-py: Full Protobuf Spec, Pure Python, Rust Accelerator

EF Core 11 Prunes Redundant Joins in Split Queries

100 Lines of Lisp: An AI Agent That Writes Its Own Tools

UPI Payment Architecture: Inside the 2,272 Crore Transaction Pipeline

Biff.graph: Query Your Clojure Codebase as a Unified Graph

Igropyr: Erlang-Style Actor Web Server in Pure Chez Scheme

Simple Fluids Can Fracture: New Physics for Engineers

xAI Grok CLI 0.2.93 Uploads Secrets and Whole Repo Unredacted

ZeroFS vs. S3 Files: POSIX on Object Storage, Differing Trade-offs

Stop Storing JWTs in localStorage: The Secure Way

China's Long March 10B First Flight: Net-Catch Booster Recovery

Cloud Run CPU Throttling: Why Background Tasks Freeze After Response