Mythos

The Claude Code Glossary is a collection of terms used in 📝Claude Code, Anthropic's CLI for Claude, spanning built-in commands, configuration concepts, and the Brian-extended ecosystem layered on top.

Glossary

A

  • 📝AGENTS.md (Claude Code) — alternative instruction file read by Codex and other agents that don't load CLAUDE.md; commonly co-located for cross-tool compatibility.
  • 📝Auto Mode — opt-in mode where Claude Code makes routine decisions autonomously and only surfaces taste-level calls for explicit approval.

B

  • Background task — work the harness runs asynchronously via run_in_background=true, notifying the agent on completion instead of blocking the conversation.

C

  • 📝CLAUDE.md as Infrastructure — instruction file Claude Code auto-loads at session start; layered at project (./CLAUDE.md), user (~/.claude/CLAUDE.md), and system levels.
  • Claude Agent SDK — SDK for building custom Claude-powered agents with their own tool sets, permissions, and orchestration logic.
  • Claude Code — the subject of this glossary; available as terminal CLI, desktop app, web app, and IDE extensions for VS Code and JetBrains.
  • 📝Codex Integration for Claude Code — skill that wraps OpenAI's Codex CLI as a second-opinion reviewer inside Claude Code.
  • 📝Compaction (Claude Code) — automatic summarization the harness performs when conversation tokens approach the model's context limit.
  • 📝context window — total tokens the model can hold in a session; Opus 4.7 supports up to 1M with the [1m] model variant.

D

  • --dangerously-skip-permissions — CLI flag that pre-approves every tool call for the session, used for fully autonomous runs.
  • 📝/dream — Brian's slash command for capturing aspirational or speculative ideas directly into the library.

E

F

  • Fast mode — toggled by /fast; runs Opus with faster output, available on Opus 4.6 and 4.7.

H

  • 📝Headless Mode (Claude Code) — non-interactive Claude Code invoked via claude -p "<prompt>", used for scripting, CI, and automation.
  • 📝Hook (Claude Code) — shell command the harness executes in response to lifecycle events like SessionStart or UserPromptSubmit.

I

  • IDE integration — Claude Code extensions for VS Code, JetBrains, and Cursor that surface the CLI inside the editor.
  • /init — built-in slash command that generates a starter CLAUDE.md for a new project.

K

  • Keybindings — keyboard shortcuts configured in ~/.claude/keybindings.json, including chord bindings for multi-key shortcuts.

L

  • /loop — built-in skill that runs a prompt or slash command on a recurring interval, e.g. /loop 5m /foo.

M

  • 📝Model Context Protocol (MCP) — the standard for exposing tools, resources, and prompts to LLM agents.
  • 📝MCP Server — process implementing MCP that Claude Code connects to via stdio or HTTP to add domain-specific tools.
  • 📝Memory (Claude Code) — file-based persistence at ~/.claude/projects/<project>/memory/, indexed by MEMORY.md, that survives across conversations.
  • 📝Model (Claude Code) — the specific Claude model in use, switched via /model; current family is Opus 4.7, Sonnet 4.6, and Haiku 4.5.
  • 📝Claude Code Monitor Tool — built-in Monitor tool that streams output from a background task line by line.
  • 📝MythOS Claude Code Skill — Brian's skill connecting MythOS as an external memory and reference system for Claude Code.

O

  • Output style — alternative system prompt (e.g., "Explanatory") that changes how Claude responds, selected via settings.

P

  • 📝Permissions (Claude Code) — granular allow/ask/deny rules in settings.json controlling which tools, Bash commands, and MCP calls run without prompting.
  • 📝Plan Mode — read-only mode entered via EnterPlanMode where Claude proposes an approach before any writes, with user approval via ExitPlanMode.
  • 📝Claude Code Plugin — bundle of skills, slash commands, hooks, and subagents distributed as a single installable unit.
  • Prompt caching — Anthropic API feature that caches large repeated context across requests with a ~5-minute TTL.

R

  • /remember — built-in slash command that prompts Claude to save a piece of information to memory.
  • 📝Claude Code Routines — recurring remote agents that execute on a cron schedule.

S

  • /schedule — built-in skill for creating, updating, listing, or running scheduled remote agents.
  • 📝/scheduled — slash command surfacing scheduled jobs registered with the harness.
  • 📝Claude Code Scheduled Triggers — pattern for triggering Claude Code runs from external events.
  • Session — a single conversation instance with its own context, transcript, and memory access.
  • 📝Claude Code Sessions from Dispatch — pattern for spawning Claude Code sessions from a central dispatcher.
  • 📝settings.json (Claude Code) — configuration file at ~/.claude/settings.json (or .claude/settings.local.json per-project) controlling permissions, hooks, env vars, and MCP servers.
  • 📝Skill (Claude Code) — file-based capability with YAML frontmatter, invoked via the Skill tool when its description matches the task.
  • 📝Slash Command — user-typed /foo that invokes a built-in (like /help or /clear) or a skill registered via plugin.
  • 📝Claude Code Forked Sub-Agents — isolated task agents spawned via the Agent tool with their own context and tool access.
  • 📝Claude Code Swarm Mode — Brian's pattern for running multiple Claude Code instances in parallel coordination.

T

  • TaskCreate / TodoWrite — built-in tools for breaking work into trackable tasks with pending, in-progress, and completed states.
  • 📝Tool (Claude Code) — a capability Claude can invoke, whether built-in (Read, Write, Edit, Bash), MCP-provided, or skill-provided.

U

  • /ultrareview — user-triggered multi-agent cloud review of the current branch or a specified PR.
  • ultrathink — keyword in a user message that requests deeper reasoning on that turn.

W

  • WebFetch / WebSearch — built-in tools for retrieving URL content and running web searches.
  • 📝Worktree (Claude Code) — isolated git worktree created for agent work, spawned via isolation: "worktree" in the Agent tool.

Contexts

Created with 💜 by One Inc | Copyright 2026