The Loop Reference sheets, cookbooks, and writing on the agentic coding harnesses — Claude Code, Codex CLI, Cursor CLI, Gemini CLI. https://theloop.sh/ 2026-07-18T12:00:00Z Tate Jennings Claude Code /fork now spawns a background session https://theloop.sh/blog/claude-code-fork-goes-background 2026-07-18T12:00:00Z 2026-07-18T12:00:00Z Tate Jennings Claude Code 2.1.212 changes /fork to copy the conversation into an independent background session. The forked-subagent behavior it used to have moved to a new /subtask command. Claude Code adds circuit breakers for runaway agents https://theloop.sh/blog/claude-code-runaway-caps 2026-07-18T12:00:00Z 2026-07-18T12:00:00Z Tate Jennings Claude Code 2.1.212 caps web searches and subagent spawns at 200 per session, both tunable by environment variable, and moves MCP tool calls to the background after two minutes. Codex moved into the ChatGPT desktop app https://theloop.sh/blog/codex-app-merges-into-chatgpt 2026-07-18T12:00:00Z 2026-07-18T12:00:00Z Tate Jennings On July 9 the Codex app merged into the ChatGPT desktop app for macOS and Windows, and the GPT-5.6 model family — Sol, Terra, and Luna — became the recommended lineup across Codex CLI and the IDE extension. Cursor CLI adds model slash shortcuts https://theloop.sh/blog/cursor-model-slash-shortcuts 2026-07-18T12:00:00Z 2026-07-18T12:00:00Z Tate Jennings The July 6 Cursor CLI release lets you switch models by typing shortcuts like /opus or /composer, defaults new installs to Auto routing, and gives /fast a quick toggle. Claude Code moved MCP auth to a subcommand https://theloop.sh/blog/claude-code-mcp-login 2026-07-13T12:00:00Z 2026-07-13T12:00:00Z Tate Jennings Week 26 adds claude mcp login and claude mcp logout, so you can authenticate a configured MCP server from the shell instead of the interactive /mcp menu. Codex CLI can web-search from inside code mode https://theloop.sh/blog/codex-web-search-in-code-mode 2026-07-13T12:00:00Z 2026-07-13T12:00:00Z Tate Jennings Codex CLI 0.139 lets code mode run standalone web searches and get plaintext results mid-task, and 0.138 hands a live CLI thread off to Codex Desktop with /app. Every harness put the agent on your phone https://theloop.sh/blog/coding-agents-on-your-phone 2026-07-13T12:00:00Z 2026-07-13T12:00:00Z Tate Jennings Cursor, Claude Code, and Codex all shipped ways to launch, watch, or steer agents from a phone in 2026. The three take different bets on how much you do from mobile. Cursor 3.11 adds side chats https://theloop.sh/blog/cursor-side-chats 2026-07-13T12:00:00Z 2026-07-13T12:00:00Z Tate Jennings A side chat runs a parallel conversation with /side or /btw while the main agent keeps working, so a clarifying question no longer derails the run or its context.