Load this when the request is a head rather than a body: a drawn face that\nbreathes, blinks, moves its eyes and turns a few degrees off axis. Every rule below\nis owned by FACE.md; this file says when to open it and what\nit will not do for you.
\n\uD83D\uDCD6 A failure line ends with the command that prints its row of the guide —\n (see rigc guide <RULE>). Run that command first, before reading anything else:\nit prints that rule's row of the shipped guide and nothing else. rigc guide §<n>\n(and §<n>.<m>, §<n>.<m>.<k>) prints the section's heading, own prose and\nsubsection index from docs/AUTHORING.md; add --all to include subsection\nbodies. A leaf prints its full text either way. Sizes describe full ledger spans;\n--all with a rule name is refused, exit 2. A compile error points at its stable\nCE_ code row. rigc guide §5.1.<k> prints a numbered compile-error group of\nat most 30,000 UTF-8 bytes, and rigc guide §5.1 prints the introduction and\nindex within that same limit; only legacy uncoded library errors point at §5.1.
build writes nothing on a red gate, and there\nis no flag that changes that — AUTHORING §0.deform key states every vertex it\nmoves; the geometry a turn implies is evaluated by you and written into the spec,\nnever inferred by the compiler — AUTHORING §4 and FACE §1.A deform key's own geometry is measured now.\nA39_DEFORM_KEEPS_TRIANGLE_WINDING refuses a key that folds a mesh inside out —\nper key, per interpolated span between two keys, per frame and per skin — and\nnames the reversed triangles with their signed areas. invariants.deformMayFold\nin the rig spec is the one declared exemption, so reach for it when the slot\nfolds on purpose and never to quiet a refusal you have not read. It is an\narchetype rule: a --profile spine build prints PROF for it and says\nnothing about the fold, so author under --profile rig-play.
What A39 still cannot say is whether the projection was the right one —\nnothing measures whether 12° was the angle the shot wanted. FACE §9.2 is that\ndemonstration, three builds with one of them refused, and §9.3 is the\ndifferential audit and the three limits it does not lift.
deform timeline field by field\nand what rigc refuses in it (§4), the failure map (§5–§6), the editor's\nconventions (§10).Every guide linked here is in the installed package at node_modules/rig-c/docs/,\nwhich is the copy that matches the rigc you run; the links go to the repository's\nmain. Inside the Claude Code plugin the same files are at ${CLAUDE_PLUGIN_ROOT}/docs/.
The install line and the build → validate → render → check loop are in the rigc\nskill.