build_nodes dry-runs the generator's intents through filter_applicable
and recorded the rejections only when NOTHING applied. A partial reject
-- e.g. a connect on a branch handle the node does not declare, one the
generator postprocess could not re-home and apply_connect now refuses --
kept the applicable intents and dropped the rest with no log line and no
diagnostic, leaving that arm unwired on the canvas without a trace.
A partial reject now logs a warning naming each dropped op, its args
(minus a create_node's config body) and the reason, and appends a
build_nodes diagnostic with the same list; the applicable intents are
still returned. The total-reject path is unchanged.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>