The content branch says what to study. The proof branch says what result to reach. A milestone belongs to a program's shared pool; a path selects and orders milestones. A lesson can contribute to a milestone without moving under it. Owner/admin author milestones; a program director with organization-scoped assignment may operate paths within that scope.
Object
In Mike Academy
What it changes
Lesson
First tool call
Teaches a technique; lives in the course outline
Contribution
That lesson prepares Ship a working agent
Connects teaching to the outcome; points to a lesson or resource
Milestone
Ship a working agent
Names the outcome and success criteria
Path
Agentic AI Developer journey
Orders selected milestones for each enrollment
Define and connect the outcome
Define Ship a working agent
As an owner/admin, open Agentic AI Developer → Milestones and create Ship a working agent. Give it a testable objective: the agent calls a tool and handles its result. State the evidence that would count. The milestone enters the program's shared pool; Milestones API exposes creation and ordering.
Show what prepares it
Attach First tool call as a contribution. The lesson stays in Build an agent → Tool calling; the contribution only says that it prepares this outcome. An API contribution targets exactly one lesson or resource. Attach contribution details that choice.
Choose a path for enrollment
In Paths, select milestones from the program's pool and order them. A path can use only a subset, so inspect the sequence before promoting a version for future enrollments. The Paths API exposes alternative paths, immutable versions and primary promotion. Add the Submit your agent demo task to Ship a working agent when the outcome should require member evidence. A contribution alone is neither a submission nor a reviewed task.
Path change
Existing enrollment
Future enrollment
Save a new version
Keeps its assigned version
Continues using the current primary version until promotion
Promote a version
Does not switch paths
Receives the newly primary version
Reorder courses/lessons
Alters the content outline
Does not itself create a new path version
Warning
If an enrolled member still sees the previous milestone order, inspect the path version stored on that enrollment. Promoting a path version affects future enrollments, not existing ones. Do not “fix” an old enrollment by silently assuming the primary path overwrote it.
