Module graph 

Task dependencies from what tasks.md documents, and which tasks are ready.

Edges come only from structure and from IDs written in task text; nothing is inferred:

• Phases. Foundational waits on all earlier phases; each user-story phase waits on the earlier non-story phases only, so stories are independent of each other; polish, convergence and unrecognised phases wait on all earlier phases.
• Subsections. A ### subsection waits on the earlier subsections of its phase (tests before implementation).
• [P] runs. A [P] task waits on the previous non-[P] task; a non-[P] task waits on the whole preceding [P] run, or on the previous task when there is no run.
• Explicit. depends on T012 / after T012 in the task text.

In declared mode (the Format line documents (depends on …)) the written references are the complete order within a phase: subsection and [P] edges are dropped, phase order is kept.

In chain mode (OpenSpec) a group waits on every earlier group and a task on the one before it in its group; written references are added.

Dangling references and cycles are errors; the tasks involved are blocked.

Enums

PhaseKind

What a phase heading says the phase is.

Functions

classify

Classifies a phase by its heading and whether its tasks carry story labels.

schedule

Builds the schedule of parsed, with graph.* diagnostics.