scripts/c6-presence-watcher.py and friends carry a Python port of
`wifi_densepose_bfld::PrivacyClass`. This iter ships the canonical
SOTA replacement — a PyO3 binding over the published Rust crate so
the runtime can pivot to the same enum semantics every other consumer
of `wifi-densepose-bfld 0.3.0` already uses.
New file: `python/src/bindings/privacy_gate.rs` (~155 LOC)
- `#[pyclass] PrivacyClass {Raw, Derived, Anonymous, Restricted}`
- `.allows_network`, `.allows_matter`, `.allows_hap`, `.as_u8` getters
- `PrivacyClass.from_u8(v)` / `PrivacyClass.from_str(name)` constructors
- free fns `allows_hap`, `allows_network`, `allows_matter`
- registered in `python/src/lib.rs` via `bindings::privacy_gate::register`
Cargo.toml gains `wifi-densepose-bfld = { version = "0.3.0", path = ... }`
as a hard dep; numpy + pyo3 + the existing core/vitals deps unchanged.
ADR-125 §2.1.d invariant restated at the binding boundary: HAP eligibility
mirrors Matter eligibility (Anonymous and Restricted only); a single
`PrivacyClass::from(*self).allows_matter()` call is the gate truth-source.
Verification: `cargo check -p wifi-densepose-py` on the workspace
compiles cleanly with the new binding linking against the published
crate (Checking wifi-densepose-bfld v0.3.0 ✓, Checking
wifi-densepose-py v2.0.0-alpha.1 ✓).
Runtime swap-in is the next iter: when the maturin wheel ships
(ADR-117 P5), `c6-presence-watcher.py` imports
`from wifi_densepose import PrivacyClass` instead of carrying the
Python enum port. Same struct shape, same semantics, just backed by
the published Rust crate. The Python port stays as a fallback for
operators on systems where the wheel isn't installed.
Refs ADR-118 §2.1, ADR-125 §2.1.d, ADR-117 §5.7 (binding strategy).
Co-Authored-By: claude-flow <ruv@ruv.net>
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