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.
Op
A single tool-native command a target composes (long form: operation); the middle of the work hierarchy (Spell to Op to Target). Op in full.
Buzz
The language magusfiles are written in (the .buzz engine). Buzz in full.
Affected
The set of projects touched by a change; magus affected <target> runs a target only over them. Affected 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.
Trace
OpenTelemetry's name for one whole magus invocation; every target it runs is a span beneath it. Trace in full.
Span
OpenTelemetry's name for one unit of work under a trace: a target execution, whose sub-operations are child spans. An output reference points at a span's captured output. Span 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.
Invocation
One magus process's recorded facts (the targets it finished, their outcomes, the lease it acted as, and the session it ran in when a host delivered one), kept in a repo-scoped store every worktree shares. magus session lists them; the store prunes itself by last-fact age. Invocation 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.