Developer Tools & APIs
Claude Code mods let developers rewrite the agent from the inside out
Anthropic's new mods system lets developers write TypeScript functions that hook into Claude Code's pipeline, add UI, and replace built-in features.
Topic
Developer Tools
55 posts about Developer Tools from Simon Carter.
Agents & Automation
OpenAI DevDay 2026: ChatGPT becomes a collaborative workspace and agent platform
ChatGPT Space, Plugin Extensions, cloud Codex, the Decisions API, MCP Events, and Sign in with ChatGPT all shipped at DevDay 2026.
Security & Governance
OpenAI patches named macOS security vulnerability CVE-2026-100754 in Codex
OpenAI has fixed CVE-2026-100754 in Codex version 26.924.20706 for macOS. All macOS Codex users should update immediately.
Developer Tools & APIs
Anthropic opens a self-serve plugin submission portal for Claude
Anthropic's new portal at claude.ai/directory/manage lets paid-plan developers submit, track, and publish Claude plugins, with MCP 2.0 support built in.
Agents & Automation
Claude Code Projects beta lets one conversation coordinate parallel cloud threads
Anthropic's redesigned Claude Code Projects coordinates parallel cloud sessions with shared memory and mobile steering, now in beta for select Pro and Max users.
Developer Tools & APIs
Claude Code v2.1.278 moves auto-mode classifier server-side, removing billing overhead for API and enterprise users
Claude Code v2.1.278 runs the auto-mode safety classifier server-side by default, ending classifier overhead charges for API and enterprise users.
Security & Governance
Claude Code 2.1.268 patches silent deny-rule bypasses and MCP secret leakage
Claude Code 2.1.268 fixes silent security boundary failures via symlinks and shell commands, plus stops MCP configs leaking secrets in plaintext.
Developer Tools & APIs
Claude Code's 11 September release: plugin evals, output-style switching, and a broad reliability sweep
Claude Code ships plugin eval scoring, /output-style switching, Bash-edit diffs, and dozens of reliability fixes in its 11 September release.
Developer Tools & APIs
OpenAI opens the Agents API in public beta: giving every developer the same managed harness that powers Codex
The Agents API public beta lets developers spin up long-running cloud agents using OpenAI's own orchestration infrastructure, at no extra fee.
Models & Assistants
ChatGPT Images 2.5 is here: faster generation, a sketch tool, and two new API models
OpenAI's Images 2.5 replaces 2.0 across all ChatGPT tiers and the API, cutting latency by 50% and adding Sketch, comment editing, and two new model IDs.
Agents & Automation
Codex Remote is now generally available on all ChatGPT plans
Codex Remote reached GA on 25 June 2026, letting every paid ChatGPT subscriber start, steer, and approve Codex work from their phone via secure QR pairing.
Developer Tools & APIs
Claude Code sets Fable 5.1 as default model and adds a fullscreen diff panel
Claude Code v2.1.257 makes Fable 5.1 the default model, adds a live /diff panel, surfaces headless commands, and fixes a batch of bugs.
Developer Tools & APIs
Claude Code's 29 August update: faster startup, a much smaller Linux download, and better token visibility
Claude Code now starts before the sandbox loads, the Linux binary shrinks from ~340 MB to ~75 MB, and /cost, /usage, and /tasks get per-command token detail.
Agents & Automation
ChatGPT's site tools let websites hand AI agents a proper API: no scraping required
OpenAI's Site Tools feature lets ChatGPT use structured tools websites expose via WebMCP, working inside your live signed-in session.
Developer Tools & APIs
Claude Code v2.1.243 adds loop token visibility, curated model picker, contracted pricing, and granular prompt-cache controls
Claude Code v2.1.243 ships four developer-facing additions: loop token breakdowns, modelPicker curation, contracted modelPricing, and split prompt-cache TTLs.
Developer Tools & APIs
Claude Files API graduates to general availability
The Files API beta header is no longer required on /v1/files endpoints, simplifying file-grounded Claude API integrations from 20 August 2026.
Developer Tools & APIs
Claude Code v2.1.233: GitLab MR support, per-user spend attribution, and Linux memory limits for Bash
Claude Code v2.1.233 adds GitLab MR URL support, opt-in per-user identity forwarding, Linux memory cgroup limits, and a configurable WebFetch cache TTL.
Models & Assistants
OpenAI previews Ultrafast: GPT-5.6 Sol at 750 tokens per second, powered by Cerebras
OpenAI's new Ultrafast API tier runs GPT-5.6 Sol up to 14× faster than standard, hitting 750 tokens/sec via Cerebras hardware.
Agents & Automation
Claude Code auto mode becomes the default on 14 August 2026 for Pro, Max, and Team plans
Anthropic's AI classifier replaces per-action approval prompts in Claude Code, catching 89% of dangerous commands vs 13.6% for human reviewers.
Developer Tools & APIs
Codex gets portable Agent Plugins, MCP 2026-07-28 support, and Bedrock caching
Codex v0.147.0 ships portable Agent Plugins with cross-catalog search, the latest MCP spec, Amazon Bedrock caching, and smarter approval workflows.
Developer Tools & APIs
Sign in with ChatGPT: OpenAI launches its first cross-platform identity system
OpenAI's 'Sign in with ChatGPT' beta lets users authenticate into Airtable, GitLab, HubSpot, Notion, Supabase, and Vercel directly from ChatGPT.
Developer Tools & APIs
MCP 2026-07-28: Stateless Core, Hardened Auth, and Official Extensions Land Across Claude
The fifth MCP spec drops stateful sessions for a request/response core, hardens OAuth/OIDC auth, and graduates MCP Apps and Tasks as versioned extensions.
Developer Tools & APIs
Claude Code v2.1.178: Precise Tool Permissions, Smarter Config Resolution, and Safer Sub-Agents
Claude Code's latest release adds parameter-level permission syntax, proximity-based .claude/ directory resolution, and pre-launch safety screening for sub-agents.
Developer Tools & APIs
GitHub Copilot CLI v1.0.72 & v1.0.73: Critical Infinite-Loop Fix and Sandbox Security Tightening
Two back-to-back Copilot CLI releases fix a dangerous agentStop infinite-loop bug, tighten macOS sandbox defaults, and patch Anthropic subagent reliability.
Developer Tools & APIs
Anthropic pauses its Agent SDK billing change on the day it was supposed to launch
Anthropic pulled back its planned Agent SDK credit separation on June 15, the day it was set to go live, saying it will rework the plan before any future change.
Developer Tools & APIs
Claude Code v2.1.169: Safe Mode, /cd Command, and a Pile of Bug Fixes
Claude Code v2.1.169 adds --safe-mode for clean troubleshooting sessions, a /cd command that preserves prompt cache, and fixes for Windows, background agents, and enterprise MCP policies.
Developer Tools & APIs
Claude for Chrome is now generally available: what the browser extension means for your dev workflow
Anthropic's Claude for Chrome extension has exited preview and is now generally available to all direct paid plan users, bringing browser automation into Claude Code.
Agents & Automation
Claude Code Auto Mode now works on Amazon Bedrock, Google Vertex AI, and Microsoft Foundry
Claude Code v2.1.158 extends Auto Mode to enterprise cloud providers via a single environment variable, for Opus 4.7 and 4.8 users.
Agents & Automation
Codex is now in the ChatGPT mobile app — live sessions, approvals, and full project context from your phone
OpenAI brings Codex to iOS and Android, letting developers monitor, approve, and steer long-running coding sessions remotely across all plans.
Developer Tools & APIs
OpenAI's GPT-Realtime-2.1 Brings Better Reasoning and 25% Lower Latency to Voice Agents
OpenAI ships gpt-realtime-2.1 and gpt-realtime-2.1-mini with improved reasoning, noise handling, and a 25%+ p95 latency cut across all Realtime voice models.
Agents & Automation
Anthropic updates Claude Managed Agents: self-hosted sandboxes, mid-session tool swapping, and cache diagnostics
Anthropic ships three Claude Managed Agents platform updates giving enterprise developers more infrastructure control, runtime flexibility, and prompt-cache transparency.
Developer Tools & APIs
Codex CLI v0.139.0: Code Mode Can Now Search the Web Mid-Task, and Complex Tool Schemas Finally Stay Intact
Codex CLI v0.139.0 lets code mode call web search directly, including from nested JS tool calls, and fixes oneOf/allOf schema preservation for MCP tools.
Agents & Automation
Claude Code v2.1.172: Nested Sub-Agents, Background Jobs, and a Raft of Bug Fixes
Claude Code v2.1.172 ships nested sub-agents up to 5 levels deep, background job syntax, plugin search, smarter Bedrock region handling, and 30 fixes.
Developer Tools & APIs
Gemini Code Assist and Gemini CLI are shutting down for consumer tiers on June 18, 2026 — here's how to migrate to Antigravity
Google is retiring Gemini Code Assist IDE extensions and Gemini CLI for free, Pro, and Ultra users on June 18, 2026. Migration to Antigravity CLI is required.
Developer Tools & APIs
Codex gets Chrome DevTools Protocol access in new Developer Mode
Codex's new Developer mode gives the agent controlled CDP access to profile JavaScript, inspect network traffic, and debug live browser state.
Developer Tools & APIs
Codex now imports your Claude Code setup — and it's built right into onboarding
OpenAI's latest Codex update adds guided migration from Claude Code and Claude Cowork, plus a revamped plugins screen with filters and keyboard navigation.
Weekly Digest
AI product notes: week of 8 June 2026
A weekly roundup of smaller AI product updates, release-note items, and admin changes worth tracking.
Developer Tools & APIs
Anthropic adds an observability dashboard and in-app submission flow for Claude MCP connector owners
Claude's new public-beta dashboard gives MCP connector owners usage metrics, error diagnostics, and latency data — plus a direct submission flow to the connectors directory.
Developer Tools & APIs
Claude Code Gets Push Notifications, Fullscreen TUI, and Smarter Session Resume
Five focused updates to Claude Code: mobile push notifications, /tui fullscreen mode, PR URL resume, Bedrock tier control, and project purge.
Developer Tools & APIs
Codex CLI Gets Session Archiving, Clickable Terminal Links, and Safer Remote Control
The latest Codex CLI update adds session archiving, OSC 8 hyperlinks in TUI markdown, richer MCP status, and short-lived WebSocket tokens for remote control.
Developer Tools & APIs
Claude Code v2.1.160: Faster auto mode, fewer CI headaches, and a raft of bug fixes
Claude Code v2.1.160 cuts auto mode classifier latency, fixes Bedrock/Vertex/Foundry CI failures, and resolves Bazel, OneDrive, CJK, and voice mode bugs.
Agents & Automation
OpenAI lets Plus and Pro subscribers buy extra Codex usage credits, with optional auto top-up
ChatGPT Plus and Pro users can now purchase additional Codex usage credits beyond their plan limits, with an auto top-up option to keep work flowing.
Developer Tools & APIs
Claude Code v2.1.163: Version Guardrails, Plugin Management, and a Sweep of Windows Fixes
Claude Code's latest release adds enterprise version enforcement, a /plugin list command, hook improvements, and fixes a pile of Windows and terminal rendering issues.
Developer Tools & APIs
Google Gemini API now supports event-driven webhooks — no more polling for batch jobs
Google's Gemini API now pushes notifications when batch jobs and long-running operations finish, eliminating the need to poll for status.
Consumer AI
ChatGPT's Codex profile now shows your usage stats and lets you share a personal card
OpenAI has added activity insights and shareable profile cards to Codex, letting consumer ChatGPT users review and share their usage highlights.
Developer Tools & APIs
Claude Code: 'workflow' renamed to 'ultracode', parallel Bash bug fixed, and OTEL team-level metrics added
Claude Code renames its dynamic-workflow trigger to 'ultracode', fixes a Bash parallel batch bug, tidies the MCP panel, and adds OTEL resource-attribute labels.
Developer Tools & APIs
Claude Code Now Auto-Loads Plugins from Local Directories — No Marketplace Required
Claude Code gains filesystem-first plugin loading from .claude/skills, a scaffolding command, autocomplete, and hot-reload — no marketplace needed.
Security & Governance
Codex CLI 0.137.0: Git Hook Blocking, WebSocket Hardening, and Windows Sandbox Setup
Codex CLI 0.137.0 closes three command-safety gaps and adds an alpha Windows elevated sandbox provisioning path for admins.
Agents & Automation
GitHub's new Copilot desktop app gives you a control room for parallel AI agent sessions
GitHub's standalone Copilot app brings a unified dashboard for managing multiple AI agent sessions, with Agent Merge, sandboxing, and an SDK now GA.
Developer Tools & APIs
GitHub Copilot Now Bills by Token: What the Switch to AI Credits Means for Your Workflow
GitHub Copilot replaced flat premium request units with token-based AI Credits on June 1, 2026. Here's what changed and who it affects most.
Agents & Automation
Google Antigravity 2.0: A Standalone Desktop App Built Around Agents, Not Editors
Google's Antigravity 2.0 ships as a standalone desktop app with multi-agent orchestration, subagent teamwork preview, and direct Google Cloud enterprise integration.
Agents & Automation
Google's Managed Agents API lets you spin up a full agentic sandbox with one API call
Google's new Managed Agents API provisions a Gemini-powered agent inside an isolated Linux sandbox in a single API call — no infrastructure required.
Developer Tools & APIs
Anthropic Acquires Stainless: What It Means for Developers Building on Claude
Anthropic has acquired Stainless, the startup behind every official Claude SDK and MCP server generator, in a deal reportedly worth over $300M.
Developer Tools & APIs
OpenAI launches GPT-Realtime-2, GPT-Realtime-Translate, and GPT-Realtime-Whisper in its API
OpenAI releases three purpose-built voice models in its Realtime API, bringing GPT-5-class reasoning, live translation, and streaming transcription to developers.
Agents & Automation
Claude Code comes to Slack: tag @Claude in a thread and get back a pull request
Anthropic's Claude Code now integrates with Slack, letting teams trigger full coding sessions from chat threads and receive completed PRs without leaving the app.