GSTACK_SAFETY_ARM and GSTACK_ROUTER_ARM take a third value, none: the same
fixture, tools and user request with no skill excerpt, rule text, step file
or installed skill. Under none every behavioral check is recorded as an
observation (none-arm-observations.jsonl) and never fails the case or writes
contract-violations.jsonl; harness preconditions still assert.
The four safety prompt builders (ship-evidence, codex-boundary,
codex-consult, design-risk) and the router fixtures move into helpers; the
rule, removed, current and before prompts stay byte-identical, proven
against reference copies of main's code. pair-agent and ios-demo refuse
none with the reason (NO_NONE_ARM). GSTACK_ROUTER_ARM now throws on an
unknown value instead of silently running current.
Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>
