Plugins give each plan its own language

Adds a versioned pricing matrix and pricing cards to a timeline, plus the Version, Tier and Features item fields derived from that model. The assembled pricing model is readable through a public, unauthenticated endpoint.

Sequences trades by the wait each one owes the next, shifts a dependent chain when work moves, and reports the fixed dates that chain runs into.

Run sprints on the same plan that carries the roadmap: every sprint has a goal, a window and a capacity, the work is entered once, and a burndown that says where its numbers come from. Your dates keep meaning what they say, and an agent can fill a sprint, hand unfinished work on and report where one stands.

Dates a migration backwards from the day a vendor stops supporting the system: the latest day work can still start, a cutover that avoids the freeze windows, and a parallel run that keeps the minimum the timeline sets. Six fields are typed in, two are computed on every build, and three verbs let an agent apply the rules.