Harvest sweep, batch 3 of 6 (first half).
Composite::declared_taps() walks the blueprint depth-first collecting
(tap name, source wire, column kind), names bare at every depth —
mirroring inline_composite's hoist, where a tap's name IS the flat
graph's load-bearing identifier — and bounds-total over invalid wires
(compile's validate_wiring stays the real gate). The CLI view loads
like --params (FILE gates the authored root name, a content id does
not), prints one 'name node.field Kind' row per tap, and renders the
tap-less case as a stderr note with empty stdout, exit 0.
Closes the recovery-only discovery loop: since #333 the only way to
learn a blueprint's declared tap names was provoking the undeclared-tap
refusal roster.
closes#337
claude
c39f5e4762