Render(v) treats JSON as the model: in -json mode it prints v as JSON;
otherwise it paints it as text — object scalars on one line as key=value
(keys blue, values bright white: a structural key/value distinction, not
semantic color), nested objects indented, arrays one block per element,
field order preserved via an order-keeping JSON decode. EmitJSON(v) is
the JSON-only arm for commands that paint their own text. Operates on
JSON only, so core stays protobuf-free (NFR-4).
Adds White to the palette. The example gains an `inspect` command
demoing Render (text vs -json). design.md FR-4.5/4.6 document the
renderer and the "JSON is always the full record; synopsis-vs-detail is
text-only" principle.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Reusable, generics-based CLI extracted from vpp-evpn's cmd/evpnc:
a declarative command tree (Node[C]) from which dispatch, '?'-help and
TAB-completion are derived, an interactive Shell[C], dynamic slot
resolvers (context-dependent via captured args), text-or-JSON output
(Emit), and color helpers (Paint/Label/KV). Builds on Linux and OpenBSD
(readline termios override). Includes a self-contained example and a
design proposal under docs/.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Pim van Pelt