Query loop
The runtime cycle that drives model requests, streamed output, tool calls, retries, and compaction.
Why it matters: It is the true execution core.
src/query.tssrc/QueryEngine.ts
Glossary
Key concepts and terms
Use this page when a file or flow mentions concepts like query loop, MCP, or permission mode before you have the full context.
ToolUseContext
The rich execution context passed into tools.
Why it matters: It proves tools are runtime citizens.
src/Tool.ts
Permission mode
A runtime autonomy profile such as default, plan, acceptEdits, or bypassPermissions.
Why it matters: It shapes how Claude Code balances autonomy and safety.
src/types/permissions.tssrc/utils/permissions/permissionSetup.ts
Skill
A packaged capability or workflow description loaded by Claude Code.
Why it matters: Skills let knowledge ship alongside code.
src/skills/loadSkillsDir.tssrc/skills/bundled/index.ts
Plugin
A higher-level extension package that can contribute commands, skills, hooks, MCP servers, and more.
Why it matters: Plugins widen the ecosystem surface.
src/utils/plugins/pluginLoader.tssrc/types/plugin.ts
MCP
Model Context Protocol for tool/resource interoperability.
Why it matters: It is a central interoperability layer in Claude Code.
src/services/mcp/client.tssrc/entrypoints/mcp.ts
Bridge mode
A remote-control mode that lets a local environment become an execution target.
Why it matters: It shows Claude Code is more than a local prompt tool.
src/bridge/bridgeMain.ts
Session storage
The persistence layer for transcript durability, resume support, and compatibility handling.
Why it matters: It turns short chats into durable workspaces.
src/utils/sessionStorage.ts