Mission uses a small domain vocabulary on purpose.

Concept	Meaning
Mission	Long-lived unit of engineering work
Running Mission instance	Live daemon-owned Mission Entity
Mission workflow definition	Repository-owned workflow law
Mission task	Executable unit of Mission work
Mission artifact	Tracked operator-facing file
Agent execution	Daemon-managed runtime execution
Entity	Daemon-addressable domain object with behavior

When code or docs need a new term, add it to CONTEXT.md or reuse an existing one. Stale synonyms make the architecture harder to operate.