developer-tools
The benchmarks say Opus 5 improved; the people using it disagree News
Anthropic reports Opus 5 as state of the art on coding and knowledge work, while developers on Hacker News and Reddit describe a model that overreaches and burns tokens, and the Claude Code system prompt grew by 48,736 tokens in a single release.
Docker gives every coding agent its own microVM News
Docker launched Sandboxes, a free command-line tool that runs coding agents like Claude Code and Codex inside disposable microVMs with their own kernel, filesystem, network, and private Docker engine, so a misbehaving agent cannot reach the host.
Two papers attack the same waste: coding agents rediscovering the same repository every session News
CodeNib builds reusable lexical, semantic and structural views of a repository per commit and cuts an agent's exploration tokens by 50 to 87%, while a companion benchmark finally measures the file-finding stage that patch-success scores hide.
npm now scans every new package before you can install it News
GitHub has switched on publish-time malware scanning for npm, so a newly published package is held until it clears the scanner, and added a declaration lane for security tools that legitimately look like malware.
Anthropic says it deleted over 80% of Claude Code's system prompt with no measurable loss News
Anthropic reports removing more than 80% of Claude Code's system prompt for its newest models without measurable degradation on internal coding evaluations, moving the deleted guidance into tool schemas, skills and memory instead.
Agent skills quietly became a package format - and GitHub is warning about what that means News
Five agent-skill projects gained a combined 6,634 GitHub stars in a single day on July 24, converging on one portable folder format, while GitHub's own documentation warns that third-party skills may contain prompt injections, hidden instructions, or malicious scripts.
OpenAI Codex Only Lets You Fill 272K of a 400K Window, On Purpose News
OpenAI's Codex coding agent exposes a 272,000-token input budget inside a 400,000-token model window, reserving the rest for output, and users frustrated by early auto-compaction have mistaken the reserve for a downgrade.
xAI open-sourced its coding agent, then locked the door behind it News
xAI published Grok Build, its agentic coding harness and terminal interface, under the permissive Apache 2.0 license -- but its contributing guide states that external contributions are not accepted, and the repository is a one-way bot-pushed mirror of an internal monorepo.
OpenAI is selling a $230 keyboard with a dial for how hard the AI thinks News
OpenAI has launched Codex Micro, a $230 mechanical control deck built with accessory maker Work Louder that puts agent status on RGB keys and reasoning effort on a physical rotary dial.
Zig's creator says the 'AI rewrote our codebase' story is marketing, not a win News
Andrew Kelley and a widely-shared essay argue the celebrated AI-assisted rewrites shipped 'unreviewed slop' - fluent code that looks correct but hides systemic bugs, a review failure rather than proof of AI or language superiority.
Developers are shipping their own kill switch for coding agents that run 'rm -rf' News
An open-source tool called Destructive Command Guard intercepts and blocks catastrophic commands like 'git reset --hard' and 'rm -rf' before AI coding agents can execute them, and has drawn more than 3,000 GitHub stars across nearly every major agent.
Microsoft's Flint gives AI agents a reliable way to make charts News
Microsoft open-sourced Flint, a compact chart specification language that lets AI agents describe a visualization in structured JSON and compile it reliably to Vega-Lite, ECharts, or Chart.js, instead of hand-writing brittle plotting code.
A repo collecting every major AI's hidden system prompt is topping GitHub News
A GitHub repository gathering the extracted system prompts of nearly every major AI product — from Claude and GPT to Gemini, Grok, and Cursor — surged up the trending charts, part of a week dominated by AI-agent infrastructure tooling.
GitHub Copilot moved everyone to metered billing -- and developers are furious News
On June 1, GitHub switched all Copilot plans to usage-based billing with monthly AI Credits, and heavy agentic users report burning through their allotment in hours, triggering a backlash and threats to leave.
Alibaba reportedly bans Claude Code over an alleged hidden backdoor News
Alibaba is reportedly banning Claude Code internally from July 10 after a researcher's analysis alleged the tool silently checked users' network and timezone settings against lists of Chinese firms; Anthropic says the mechanism was anti-abuse and is being removed.
Google ships a faster, cheaper image model and hands developers conversational video editing News
A lightweight version of Google's image model now makes a picture in about four seconds for a fraction of a cent, while a new video model lets developers edit clips by talking to it.
Claude Code was quietly fingerprinting requests through a hidden mark in the date News
A reverse-engineer found that Claude Code secretly changes tiny characters in the date it sends the model - a covert marker aimed at spotting resellers and copycats.
A trust wobble hits AI coding tools: hidden reasoning and a runaway bug News
Two heated developer threads converge on one worry -- whether you can trust what an AI coding assistant shows you it's thinking, and what it quietly does to your machine.
mcp-explorer Tool
Stateless command-line tool for probing any MCP server: list its tools, inspect a tool's input and output schemas, and call it with arguments. Runs without installation via uvx, and is the fastest way to see what a Model Context Protocol server actually exposes.
mattpocock/skills Tool
A small, composable set of engineering workflow skills - design review, issue triage, test-driven development, spec generation - deliberately built to plug into your process rather than own it. Installs into any harness that reads the Agent Skills format.
localskills.sh Tool
A versioned registry and distribution layer for coding-agent skills. A skill is a folder rooted in SKILL.md with optional scripts, references and assets; versions are immutable and hash-tracked, and installs land in each agent's native location. Its MCP server also lets an agent search and load a skill mid-task, though that copy lives only in the current context window unless installed locally.
ego-lite Tool
A macOS browser built so a human and an agent can browse in parallel without fighting over the same window. Ships a substantive browser-automation skill defining a Playwright-like JavaScript surface for agents to drive it.
design.md Tool
A simple convention from Google Labs for writing a DESIGN.md file that gives an AI coding assistant the context and intent it needs before it starts writing code, aimed at fewer wrong turns on bigger tasks.
codebase-memory-mcp Tool
Indexes an entire codebase into a persistent, queryable knowledge graph so AI agents can understand large projects fast. Supports a huge range of programming languages, answers queries near-instantly, and ships as a single dependency-free binary.
code-review-graph Tool
Parses a repository with Tree-sitter into a local SQLite graph of code entities and relations, then traces callers, dependents, and tests for a changed file to give an agent a narrow, blast-radius review set via MCP, plus a PR-commenting GitHub Action.
chrome-devtools-mcp Tool
An official MCP server that lets coding agents control and inspect a live Chrome browser, exposing DevTools automation, debugging, and performance analysis to AI assistants.
Skybridge Tool
A framework for building MCP-native apps -- interactive tools an AI assistant can open and use directly, pitched as 'MCP apps are the new website.'
Semgrep Tool
Static-analysis security scanner that finds vulnerability classes like broken access control in real codebases, increasingly paired with AI models in its pipeline. Its public benchmark work this week is also a useful, honest reference for how well current models actually find security bugs.
PyLate Tool
A training and retrieval library for late-interaction models, built on Sentence Transformers, for people who want to fine-tune a retriever on their own corpus rather than use an off-the-shelf embedding API.
Prelint Tool
Reviews every pull request against a repository's own specs and decision documents rather than just lint and test failures, checking whether the change matches stated product intent. Integrates with GitHub and GitLab at one dollar per completed review.
OfficeCLI Tool
A command-line tool that lets AI agents read and edit Word, Excel, and PowerPoint files, one of the week's fastest-rising agent-infrastructure repos on GitHub.
Headroom Tool
A drop-in proxy that sits between your coding assistant and the AI model and automatically compresses bulky tool outputs, logs, and retrieved text before they reach the model — cutting token usage sharply without changing your code.
Grok Build Tool
xAI's agentic coding harness and terminal interface, published under Apache 2.0. Genuinely useful if you want to read how a frontier lab wires a production coding agent, and the license lets you fork and ship it. Note the governance: the contributing guide says external contributions are not accepted, and the repo is a one-way bot-pushed mirror of an internal monorepo.
Firecrawl Tool
A hosted API that crawls, scrapes and structures web pages into clean text for agents and retrieval pipelines, handling the JavaScript rendering and rate limiting you would otherwise build yourself.
FastMCP Tool
A Python toolkit that turns ordinary functions into Model Context Protocol tools, resources, and prompts with generated schemas, validation, and docs, and a client that handles transport negotiation, auth, and protocol lifecycle.
ECC Tool
Cross-host configuration for coding agents: shared skills, rules, commands and hooks plus security scans and gates that work across Claude Code, Codex and others, so one policy set follows you between harnesses.
Docker Sandboxes (sbx) Tool
Free command-line tool that runs coding agents inside disposable microVMs with their own kernel, filesystem, network, and private Docker engine, so an unsupervised agent cannot reach the host. Supports Claude Code, Codex, Copilot, Cursor, Gemini and others on macOS, Windows, and Linux; commercial use included at no cost.
DeerFlow Tool
ByteDance's open-source agent harness that breaks a long task into specialist sub-agents running in parallel, executes code safely in sandboxes, keeps memory across sessions, and produces reports, slides, and pages; built on LangChain and works with multiple model providers.
Codex Micro Tool
A $230 mechanical control deck for driving OpenAI's Codex agents, built with keyboard maker Work Louder. 13 switches, a joystick, a touch sensor, RGB keys showing live agent status, and a rotary dial that adjusts reasoning effort -- turning an API parameter into a physical knob. Nothing it does is impossible with keyboard shortcuts; the pitch is ambient awareness when supervising several agents at once.
Claude Video Tool
A /watch skill that downloads a video, extracts adaptive keyframes, pulls existing captions or falls back to Whisper transcription, and hands the material to the host coding agent. An input adapter rather than a planner.
Claude Code Tool
Anthropic's command-line coding agent that reads a whole codebase, edits files, runs tests and fixes failures on its own; it is the tool behind Anthropic's disclosure that Claude now authors most of its production code.
Am I in The Stack? Tool
Lets a developer check whether their GitHub repositories were included in The Stack code dataset, and points to BigCode's removal process. Opted-out repositories are dropped before each patch release.