cursor

A guard hook that crashes or times out lets the dangerous command through in most coding agents. Fail closed for pre-action guards, fail open for everything else, and make the script fail closed by itself because Copilot, Codex and Gemini CLI treat a timeout as allow. Compared on Claude Code 2.1.295+, Cursor hooks, Copilot CLI 1.0.105, Codex and Gemini CLI, with a portable guard script.

Wire Cursor Rollouts (launched September 23, 2026) to your CI and to Datadog so every PR, including the ones a cloud agent wrote, gets a rollout plan before merge and per-environment checks at deploy, 20 minutes, 1 hour, 1 day and 3 days. Covers the DeploymentsService API, a GitHub Actions job, the Datadog MCP data source, and the gotchas that leave changes stuck in Pending.

A practical setup for Cursor Projects: prepare the repo so every worker starts warm, seed the Project's shared Context with a plan, conventions and a slice ledger, cut the work into disjoint PR-sized slices, and let subscriptions keep it moving. Covers Cursor 3.24, plan and admin gates, and the gotchas of a Context that lives outside git.

MCP is a JSON-RPC protocol that lets any AI host call tools, read resources and use prompts from any server, the way LSP did for language support. Here is how it works on the wire under revision 2026-07-28, captured from a real server, and why VS Code, Visual Studio, JetBrains, Xcode, Zed and Cursor all converged on it.

Move a repo, its Cursor cloud agents, automations, Bugbot, and CI from GitHub to Cursor Origin without a flag day: mirror first, rewire agents and CI while GitHub is still the source of truth, then cut over with Detach from GitHub or the reversible inbound_to_outbound mirror transition. Covers what breaks, the Origin CLI and API calls, a ref-parity check, and the rollback path.

Claude Code 2.1.277 reads AGENTS.md natively, so Cursor, Claude Code, and most Copilot surfaces can now share one instructions file. Here is the checklist for merging three drifted rule files into AGENTS.md, which bridge files to delete, the one Copilot file you still have to generate, and a CI check that keeps them from drifting again.

A side chat branches off what the agent already knows; a subagent goes and finds out something new. Claude Code's /btw has no tools at all, Cursor's /btw opens a full agent, and a plain subagent sees none of your conversation. A decision guide for Claude Code 2.1.278 and Cursor 3.11+.

Four ways to run Cursor Self-Hosted Machines workers for Cloud Agents, compared on isolation, pickup latency, session limits, per-session cost, and where the team service-account key ends up. Vercel Sandbox is the default pick, AWS Lambda MicroVMs if agents must reach your VPC.

A September 2026 comparison of GitHub Copilot code review, Cursor Bugbot, and anthropics/claude-code-action@v1 running the code-review plugin: what each one reads, what it skips, what it costs per review, and which to put on which repo.

Agent Execution Timed Out, ERROR_EXTENSION_HOST_TIMEOUT and Timeout waiting for EverythingProvider are one failure: Cursor's extension host missed its 60 s startup budget. Read exthost.log first, then fix the right cause: endpoint security, a VPN capturing loopback, a corrupt state database, or an extension.