the loop
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The / loop

Reference sheets, cookbooks, and writing on the agentic coding harnesses. The sheets are re-derived weekly from the upstream docs — every section traces to a fetched source, and each sheet is also available as raw JSON.

❯ claude-codeClaude CodeTerminal-native agentic coding harness.Anthropic · v2.1.319 · verified 7 November 2026 ❯ codex-cliCodex CLIUse Codex from your terminal and scripts — OpenAI's agentic coding CLI.OpenAI · v0.167.0 · verified 9 November 2026 ❯ cursor-cliCursor CLICursor's AI coding agent, run directly from your terminal.Cursor · vv2026.10.22 · verified 26 October 2026 ❯ antigravity-cliAntigravity CLIThe terminal-first surface to interact with Antigravity agents.Google · v1.5.3 · verified 9 November 2026

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Claude Code can deny permission prompts instead of waiting on themClaude Code 2.1.319 adds the permissions.denyInsteadOfPrompting setting. A tool call that would wait on a permission prompt is denied and the turn continues, in terminal sessions, subagents and teammates. Claude Code adds CLAUDE_CODE_DISABLE_FEATURE_FLAGS and changes auto mode when flags are offClaude Code 2.1.319 adds an environment variable that stops feature-flag fetching without turning off telemetry, and changes auto mode so that sessions with flags off no longer fall back to the built-in classifier unless you set CLAUDE_CODE_AUTO_MODE_SERVER=0. Claude Code runs MCP tasks in the backgroundClaude Code 2.1.319 supports MCP tasks in the terminal. When an MCP server runs a tool call as a task, Claude Code backgrounds it and reports the result when it finishes. Two environment variables turn this off. Claude Code's self-paced /loop now ends if an iteration doesn't rescheduleClaude Code 2.1.319 changes self-paced /loop so a turn that finishes without rescheduling ends the loop, instead of getting one fallback wakeup. Set CLAUDE_CODE_LOOP_KEEPALIVE=1 to keep the old behavior. Cursor CLI's Grep and Glob now search folders outside the workspaceSince Cursor CLI v2026.10.15, Grep and Glob search a folder outside your open workspace when the agent asks for one, instead of quietly searching the workspace and returning results from the wrong place. Antigravity CLI replaces Gemini CLI for individual accountsSince June 18, 2026, Gemini CLI no longer serves free or Google AI Pro and Ultra accounts; those users moved to Antigravity CLI. Gemini CLI continues for Gemini Code Assist enterprise customers, and The Loop now tracks Antigravity CLI instead. Cursor CLI post-tool hooks now fire for subagentsSince Cursor CLI v2026.10.17, postToolUse and postToolUseFailure hooks that match the Task tool run when a subagent finishes or fails, and hooks inside a subagent receive the subagent's own transcript path. Claude Code caps concurrent prompt and agent hooksVersion 2.1.312 limits prompt and agent hooks to 24 running at a time per session, subagents included, plus 12 that have waited past their event's timeout, and rounds any timeout under one second up to one second.