715c8ef applied the evidence rule in one direction only: an `unknown_block`
(any INSERT a plain LINE happened to touch, filed at 0.3) could not *create*
a pid_dangling_line, but it could still *suppress* one. build_graph attaches
a line end that lands on such a box and invents port `p1` at the line's own
end, so `graph["dangling"]` is empty and `_dangling`, which only read that
list, called the line connected. A process line from P-101's discharge to
the sheet frame (a CTO title block is a block reference) passed
drawing_critique and the drawing_finalize gate; the same line stopping 2 mm
short of the frame was an error. Spec §11.1 says the end resolves to nothing
in both cases — a frame, a logo or a note symbol is nothing the drawing
vouches for.
`_dangling` now reads two sources with one rule: the graph's own dangling
rows (filtered to evidenced edges, as before) plus every end of an evidenced
edge whose ref points at an `unknown_block`, at that inferred port's x/y.
The `nearest` hint is computed the way the graph computes it for a free end
(nearest port within 10·tolerance, same space), over recognised nodes' ports
only, so the invented `p1` can never be the suggested fix; `detail["touches"]`
names the block the end sits on. The other direction is unchanged: a note
leader whose only anchor is an unknown_block is not evidenced and stays out.
Tests: the reviewer's repro (landing on the frame → error; graph attaches it,
dangling=[]), the stop-short control, the finalize gate raising on it, and
the nearest-port hint naming a catalogue valve's port 1 mm away rather than
the frame's inferred port.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
