developer-tools
Developer demo shows private Siri model routing, not a shipped Claude or ChatGPT switch News
A macOS demonstration shows private Siri hooks for model delegation and a replaceable inference provider, but Apple has not released a public iPhone model-picker or third-party Siri entitlement.
RTK claims up to 90% token savings for coding agents. A 1,740-run cost test found about 5%. News
Quesma ran 1,740 coding-agent attempts with and without RTK, a popular open-source tool that compresses terminal output before an AI agent reads it, and found it cut one setup's total bill by about 5% while raising another's by about 5%, even as RTK's own counter reported an 89% reduction.
Flask's creator ran an AI 'software factory' for 35 hours and got nothing of value News
Armin Ronacher, creator of the Flask web framework, wrote on 7 September 2026 that OpenAI's GPT-6 Astra is impressive but writes compressed, hard-to-review code, and that an unattended 35-hour agent run cost about $1,200 and produced nothing useful; a post from his company Earendil found agent-written code roughly twice as verbose as established human projects.
OpenAI turns the Codex harness into a product with an Agents API News
OpenAI put an Agents API into public beta on 10 September 2026 that lets developers build on the same managed Codex harness its own products use, with OpenAI handling session orchestration, context compaction and recovery - making the scaffolding around the model, rather than the model, the thing being sold.
Spotify's Portal cuts coding-agent context use, but not the need to check the work News
Spotify reports about 90% lower bulk-read input use with a routing harness for coding agents, while warning that the delegated worker missed a subtle thread-safety bug.
Google's Antigravity terms ban third-party clients, and name one by name News
Google's Antigravity Additional Terms state that using third-party software to access the service is a breach of the agreement, naming OpenClaw with Antigravity OAuth as the example, with suspension or termination of Antigravity and Gemini CLI accounts as the stated penalty.
Anthropic published a working commerce agent, and left out the parts everyone else adds News
Anthropic released a commerce agent blueprint and runnable repository on September 2, 2026 built on a single Claude model in one agent loop, explicitly rejecting the intent router and specialised sub-agents that most production designs use, with checkout handoff and staged merchant writes enforced in code.
OpenAI open-sourced the agent loop, not the model News
OpenAI released the Codex harness under Apache-2.0, opening the execution runtime that powers its app, CLI, and IDE extension, and on August 24 deprecated the older codex mcp-server command in favor of the new app server.
A proxy with 49,000 stars keeps Claude Code and swaps the model News
Free Claude Code, an MIT-licensed local proxy that lets Claude Code talk to roughly 50 other model providers while preserving Anthropic's wire protocol, has passed 49,000 GitHub stars, and its per-tier routing shows exactly which layer users actually value.
MCP is rebuilding its authorization around agents instead of people in browsers News
The Model Context Protocol's new roadmap, published August 22, says its current authorization model assumes a human approving access in a browser while the real callers are increasingly cloud agents and sub-agents, and proposes cryptographic client binding and workload identity to close the gap.
DeepSeek shipped an agent runtime where even the loop is a plugin News
DeepSeek published deepseek-harness, an MIT-licensed agent runtime in which models, tools, skills, sessions, sandboxes, storage, scheduling, the interface, and the agent loop itself are all plugins that can be swapped from configuration.
llama.cpp tagged v0.1.0 after ten thousand build numbers News
The most widely used local AI inference engine published its first semantic version tag on August 17, 2026, after years of releasing by build number, while a pending contribution adds a speculative-decoding mode that adjusts its own draft depth on the fly.
Cursor built its own GitHub News
Cursor shipped Origin, a git forge with repository hosting, pull requests and GitHub mirroring built directly into the company's AI coding platform, in early beta for paying customers only.
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.
worktrunk v0.77.0 Tool
A command-line tool for managing Git worktrees, designed for running several AI coding agents in parallel on one repository. The 8 September release improves the wt list layout and makes JSON schema 2 the default.
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.
llm 0.35 Tool
Simon Willison's command-line tool and Python library for running prompts against many model providers from a terminal, with logging to SQLite; the 0.35 release adds support for the newly shipped gpt-6-astra model.
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.
NVIDIA Nsight AI (CUDA MCP server) Tool
A vendor-hosted Model Context Protocol server that gives coding agents current CUDA documentation and code examples, plus a self-hosted blueprint for teams that cannot call out. First connection authenticates with an NVIDIA Developer account, and the docs include a one-line command to register it with common agent CLIs.
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.
Google Antigravity Tool
Google's agentic coding environment, free during its public preview, built to run Gemini models as autonomous agents across an editor, a terminal and a browser rather than as an inline autocomplete.
Free Claude Code Tool
MIT-licensed local proxy that lets Claude Code, Codex, OpenCode and other coding agents run against roughly 50 different providers, preserving Anthropic's wire protocol so the client never notices. Routes each internal model tier to a different upstream.
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.
Cursor Origin Tool
Cursor's own git forge, now in early beta: create repositories, push and pull with standard git, mirror a GitHub repo in, browse and search code in the browser, and open and merge pull requests without leaving the Cursor platform. Available on Pro, Teams and Enterprise plans; not on free.
Codex app-server Tool
OpenAI's now-open-source agent harness, exposed as a bidirectional JSON-RPC server you can embed in your own application: persistent threads, streamed events, mid-turn interruption, client-owned tools, and human approval handoffs. Apache-2.0.
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.
Codex Harness Tool
The Apache 2.0 agent runtime behind OpenAI's Codex, usable directly if you would rather run the loop yourself than buy the managed version. Ships as a CLI for bounded jobs, an SDK for programmatic control, and an app-server for persistent threads with human approvals.
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 Skills API Tool
Now generally available on the Claude Platform. Skills are folders of instructions, scripts, and templates managed as first-class API objects with create, list, get, delete, and version endpoints. They attach to a request by identifier, execute inside the code-execution sandbox, and up to twenty can ride along on a single call.
Claude Files API Tool
Generally available alongside the Skills API. Upload a file once, get an identifier, and reference it across later requests instead of re-sending contents; download files produced by skills or code execution; list, retrieve, and delete. Files are scoped to the workspace rather than to an end user.
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.
Berd Tool
Block's open-source Tauri desktop application for working with AI agents, wrapping the Goose backend over a WebSocket connection and adding projects, skills, extensions, automations, providers and session history in one window. Apache 2.0.
Armature Leaderboards Tool
Tracks which developer tools coding agents actually choose when asked to build something, using synthetic company-like repositories, frozen persona prompts and pinned agent CLIs in sandboxed runs. Every session behind every number is published and replayable. Note the disclosed conflict: Armature sells ranking optimisation to tool vendors.
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.