Tag: cursor

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.

Use Cursor's /goal command to keep a cloud agent working toward one finish line across many turns. Covers writing a verifiable objective, pinning a Custom Mode playbook, pairing it with /loop and subscriptions, the CLI's durable goals, and how to stop a goal that ignores Stop.

Cursor's Self-Hosted Machines, shipped September 2, 2026, move Cloud Agent tool calls onto hardware you own while inference stays in Cursor's cloud. The agent worker CLI, My Machines vs Team Pools, the three outbound hosts, and the data that still leaves your network.

The cold start of a subagent is not what costs you money. Measured across 117 real Claude Code subagent transcripts, startup context was 0.6% to 18% of each agent's total spend. Depth is expensive because every layer runs its own agentic loop and hands the layer above a summary instead of evidence. Here is the compression test that tells you which layer to delete.

Agent Plugins 1.0.0 standardizes exactly two component types: skills and MCP servers. Slash commands, hooks, subagents, rules, LSP servers, permission config and secrets all stay vendor-specific. Here is the field-by-field matrix across Claude Code, Cursor, Copilot and Codex, and which layout to author in.

A server that vanished from /mcp with no error is almost always an allowlist. Run claude mcp add on the same server: the add path prints the reason the load path swallows.

Cursor shipped Builds for Cloud Agents on August 13, 2026: a bootable filesystem snapshot of an already prepared machine. Cursor reports 3x faster time to first token. The lever you control is the install vs start split in .cursor/environment.json.