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row 166: strike the unserved plane FFI subprocess spawn path (its env secret resolved at the spawn) - #866
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… and is struck; a plane-driven subprocess open is refused at the seam Row 166 (ARCHITECT 2026-10-13, F11). The only production caller of pipe::open_subprocess (egress.rs:562) passed an empty program allowlist, and command_admissible requires an absolute path ON that allowlist. So every plane-driven open was refused before resolve_child_env, and the command decode, the host-side env secret resolution (resolve_linked_string at the spawn, a request path), the child lifecycle and the pipe registry ran in no served path. Nothing in the tree opened a pipe any other way: RawConn answers Unsupported. - egress_open: EgressKind::Subprocess answers Refused at the seam, before anything on the descriptor is decoded or resolved (the same answer every plane got). - pipe.rs keeps the two vtable slots. Each answers as it did for every pipe a plane could name (Gone), after the host-context and out-pointer checks, failing closed on a caught panic. - pipe_tests: the FFI refusal cell now carries a secret env record and asserts both slots answer Gone for any pipe and Refused for a null out-pointer. The cells that drove the struck mechanics through a host-authored allowlist (a posture no served path held) go with them.
… the ten hits #866's strike drained (Law 9: the ceiling ratchets down to the measure)
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Row 166, per the ARCHITECT ruling of 2026-10-13 (F11: unserved code is deleted with proof).
Reachability proof
pipe::open_subprocesshas one production caller,plane_host/egress.rs:562, which passes&[]as the program allowlist.command_admissible(pipe.rs:278) requires an absolute path that is ON the allowlist, so it is false for every input. It runs beforeresolve_child_env(pipe.rs:296-299 vs :309).resolve_linked_stringat the spawn, on a request path), the child lifecycle and the pipe registry were reached only bypipe_teststhrough a host-authored allowlist that no served path holds.Change
EgressKind::SubprocessanswersRefusedat the seam, before anything is decoded. Every plane saw the same answer before.pipe.rskeeps onlypipe_read/pipe_write: Refused on a bad host context or null out-pointer, otherwise Gone, Fault on a caught panic.pipe_tests: the FFI refusal cell carries a secret env record and asserts the slots' answers. The cells that drove the struck mechanics go with them.Gates whose ledgers name pipe.rs still match:
one-memory-abi:c-unwind(the slots stay extern "C-unwind") and constructionknown_sites(catch_unwind stays).Independent of #863/#864/#865.