Beads: add dependency

Semantics

This skill links two tasks so that one depends on (is blocked by / is a child of) another.

Note: Beads supports several relationship types; the essential command from the README is:

bd dep add <child> <parent>

Procedure

1. Confirm which task is the child and which is the parent (blocker).
2. Run:

bd dep add <child-id> <parent-id>

3. Optionally verify by showing the child: