Workspace
The magus root directory that owns a set of projects and shared config; the unit magus operates over. Workspace in full.
Project
A directory magus recognizes as a unit of work (it has a magusfile); the unit of caching, scheduling, and dependency tracking. Project in full.
Magusfile
The magusfile.buzz that declares a project's targets (as export funs) and binds its spells. Magusfile in full.
Target
A named operation (build, test, ...) you invoke with magus run <target>; it may compose a spell's tool-native operations and depend on other targets. Target in full.
Manifest
The file that declares what a package is: its name, dependencies, entry points and tool config (go.mod, package.json, pyproject.toml, Cargo.toml). How the workspace builds, tests and lints the package belongs in the magusfile, not in the manifest's scripts. Manifest in full.
Cache
The content-addressed store magus consults before running a target, so unchanged work is skipped. Cache in full.
CI
An ordinary target you compose yourself with ctx.needs; magus does not hardcode its stages. It is the anchor magus affected ci keys off, and ci strips the rw charm. CI in full.
Knowledge graph
The queryable graph of a workspace's spells, targets, docs, and code relationships; query it with magus query/explain/path. Knowledge graph in full.
Agent
A model working through an agent host such as Claude Code, Codex, Cursor or OpenCode. magus treats an agent as one more caller of its CLI, MCP tools and console, held to the same checks as a person. Agent in full.
An action a model can call through its host: a name, a description, a typed input and a result. magus serves its tools over MCP, each a read of the workspace model or a run of the CLI it already has. Tool in full.
Run
One target executing under one magus invocation, such as magus run test web or magus affected ci. A run keeps its captured output behind an output reference. Every magus run is a run whether or not any job asked for it; see Job for how the two relate. Run in full.