From d060998e3b7fcc62593000153368cbb840a3341a Mon Sep 17 00:00:00 2001
From: ruv <ruv@ruv.net>
Date: Tue, 21 Jul 2026 16:28:14 -0700
Subject: [PATCH] feat(adr-185): P1 AETHER bindings (wifi_densepose.aether) +
 parity harness

Bind the ADR-024 contrastive CSI embedding surface into the wheel behind
a gated [aether] extra / Cargo `aether` feature, per ADR-185 section 3.2.

Surface (bound against the REAL code at HEAD, not the ADR wishlist):
- AetherConfig       -> EmbeddingConfig {d_model,d_proj,temperature,normalize}
- CsiAugmenter       -> augment_pair(window, seed)
- EmbeddingExtractor -> embed(csi): 128-dim L2-normed, GIL-released
- info_nce_loss, cosine_similarity (module fns)

ADR-185 section 3.2 also names aether_loss/VICReg components,
alignment_metric, uniformity_metric, forward_dual, and vicreg_* config
fields. None exist in embedding.rs at HEAD, so they are intentionally NOT
bound (a Rust-side gap, not a binding gap) rather than fabricated.

Parity (section 4.1, release-blocking): committed fixture
aether_input.json -> native Rust reference (tests/aether_parity.rs, calls
sensing-server EmbeddingExtractor directly) locks
tests/golden/aether_embedding.sha256; pytest (tests/test_aether.py) runs
the same fixture through the binding and asserts the identical SHA-256 of
the LE f32 bytes. Both pass.

Verified: cargo test --features aether --test aether_parity -> 2/2 pass;
maturin develop --features aether + pytest tests/test_aether.py -> 9/9
pass; default cargo build clean with 0 sensing-server refs in the dep
graph (gate keeps the base wheel lean).

HONEST WHEEL-SIZE FINDING (ADR-185 section 9 / Open Q 11.1, unresolved):
wifi-densepose-sensing-server is an Axum/tokio crate whose tokio/axum/
worldgraph/ruvector deps are NON-optional (only mqtt/matter are
features), so default-features=false does NOT drop them. An [aether]
wheel therefore links the full server tree and BREAKS the ADR-117 section
5.4 <=5 MB budget. The fix is the ADR-sanctioned hoist of embedding.rs
(+ its graph_transformer/sona siblings) into a leaf crate so the wheel
links pure compute only -- a change INSIDE wifi-densepose-sensing-server,
owned by another agent this session, so deferred as a required
pre-release follow-up. P1 binds real code and proves parity today; the
hoist is a wheel-size optimization, not a functional blocker.

Note: building required initializing the worldgraph/rufield/ruvector
submodules (absent in the fresh worktree).
---
 python/Cargo.lock                           | 3707 ++++++++++++++++++-
 python/Cargo.toml                           |   31 +-
 python/pyproject.toml                       |    6 +
 python/src/bindings/aether.rs               |  242 ++
 python/src/lib.rs                           |   11 +
 python/tests/aether_parity.rs               |   99 +
 python/tests/golden/aether_embedding.sha256 |    1 +
 python/tests/golden/aether_input.json       |    1 +
 python/tests/test_aether.py                 |  103 +
 python/wifi_densepose/aether.py             |   47 +
 python/wifi_densepose/aether.pyi            |   54 +
 11 files changed, 4276 insertions(+), 26 deletions(-)
 create mode 100644 python/src/bindings/aether.rs
 create mode 100644 python/tests/aether_parity.rs
 create mode 100644 python/tests/golden/aether_embedding.sha256
 create mode 100644 python/tests/golden/aether_input.json
 create mode 100644 python/tests/test_aether.py
 create mode 100644 python/wifi_densepose/aether.py
 create mode 100644 python/wifi_densepose/aether.pyi

diff --git a/python/Cargo.lock b/python/Cargo.lock
index 8d06cfcb..85511a2c 100644
--- a/python/Cargo.lock
+++ b/python/Cargo.lock
@@ -2,6 +2,21 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "aho-corasick"
+version = "1.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ddd31a130427c27518df266943a5308ed92d4b226cc639f5a8f1002816174301"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "allocator-api2"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "683d7910e743518b0e34f1186f92494becacb047c7b6bf616c96772180fef923"
+
 [[package]]
 name = "android_system_properties"
 version = "0.1.5"
@@ -11,12 +26,88 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "anndists"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a8396b473aa0bceed68fb32462505387ea39fa47c7029417e0a49f10592b036"
+dependencies = [
+ "anyhow",
+ "cfg-if",
+ "cpu-time",
+ "env_logger",
+ "lazy_static",
+ "log",
+ "num-traits",
+ "num_cpus",
+ "rayon",
+]
+
+[[package]]
+name = "anstream"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "824a212faf96e9acacdbd09febd34438f8f711fb84e09a8916013cd7815ca28d"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "940b3a0ca603d1eade50a4846a2afffd5ef57a9feac2c0e2ec2e14f9ead76000"
+
+[[package]]
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+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52ce7f38b242319f7cabaa6813055467063ecdc9d355bbb4ce0c68908cd8130e"
+dependencies = [
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc"
+dependencies = [
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "3.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d"
+dependencies = [
+ "anstyle",
+ "once_cell_polyfill",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "anyhow"
 version = "1.0.102"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f202df86484c868dbad7eaa557ef785d5c66295e41b460ef922eca0723b842c"
 
+[[package]]
+name = "approx"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cab112f0a86d568ea0e627cc1d6be74a1e9cd55214684db5561995f6dad897c6"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "arrayref"
 version = "0.3.9"
@@ -29,12 +120,146 @@ version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"
 
+[[package]]
+name = "async-trait"
+version = "0.1.91"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae36dc4177970ef04fde5178d3e2429882def40e57a451f919c098f72baa6cec"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 3.0.2",
+]
+
+[[package]]
+name = "atomic-waker"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
+
 [[package]]
 name = "autocfg"
 version = "1.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2032f911046de80f0a198e0901378627c33f59ea0ac00e363d481118bd70a53"
 
+[[package]]
+name = "axum"
+version = "0.7.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edca88bc138befd0323b20752846e6587272d3b03b0343c8ea28a6f819e6e71f"
+dependencies = [
+ "async-trait",
+ "axum-core",
+ "axum-macros",
+ "base64",
+ "bytes",
+ "futures-util",
+ "http",
+ "http-body",
+ "http-body-util",
+ "hyper",
+ "hyper-util",
+ "itoa",
+ "matchit",
+ "memchr",
+ "mime",
+ "percent-encoding",
+ "pin-project-lite",
+ "rustversion",
+ "serde",
+ "serde_json",
+ "serde_path_to_error",
+ "serde_urlencoded",
+ "sha1",
+ "sync_wrapper",
+ "tokio",
+ "tokio-tungstenite",
+ "tower",
+ "tower-layer",
+ "tower-service",
+ "tracing",
+]
+
+[[package]]
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+checksum = "09f2bd6146b97ae3359fa0cc6d6b376d9539582c7b4220f041a33ec24c226199"
+dependencies = [
+ "async-trait",
+ "bytes",
+ "futures-util",
+ "http",
+ "http-body",
+ "http-body-util",
+ "mime",
+ "pin-project-lite",
+ "rustversion",
+ "sync_wrapper",
+ "tower-layer",
+ "tower-service",
+ "tracing",
+]
+
+[[package]]
+name = "axum-macros"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57d123550fa8d071b7255cb0cc04dc302baa6c8c4a79f55701552684d8399bce"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
+
+[[package]]
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+version = "1.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2af50177e190e07a26ab74f8b1efbfe2ef87da2116221318cb1c2e82baf7de06"
+
+[[package]]
+name = "bincode"
+version = "1.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "bincode"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "36eaf5d7b090263e8150820482d5d93cd964a81e4019913c972f4edcc6edb740"
+dependencies = [
+ "bincode_derive",
+ "serde",
+ "unty",
+]
+
+[[package]]
+name = "bincode_derive"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf95709a440f45e986983918d0e8a1f30a9b1df04918fc828670606804ac3c09"
+dependencies = [
+ "virtue",
+]
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
 [[package]]
 name = "bitflags"
 version = "2.11.1"
@@ -52,7 +277,16 @@ dependencies = [
  "cc",
  "cfg-if",
  "constant_time_eq",
- "cpufeatures",
+ "cpufeatures 0.3.0",
+]
+
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
 ]
 
 [[package]]
@@ -61,6 +295,47 @@ version = "3.20.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72f5acc6cb2ba439de613abc23857ec3d78374d8ed5ac84e9d11336e87da8649"
 
+[[package]]
+name = "bytecheck"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0caa33a2c0edca0419d15ac723dff03f1956f7978329b1e3b5fdaaaed9d3ca8b"
+dependencies = [
+ "bytecheck_derive",
+ "ptr_meta",
+ "rancor",
+ "simdutf8",
+]
+
+[[package]]
+name = "bytecheck_derive"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89385e82b5d1821d2219e0b095efa2cc1f246cbf99080f3be46a1a85c0d392d9"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
+[[package]]
+name = "bytemuck"
+version = "1.25.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "95832e849adfb21180ccb6826a99da14e5d266ae5c2e668e1602cf234f153797"
+
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
+[[package]]
+name = "bytes"
+version = "1.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc652a48c352aef3ea3aed32080501cf3ef6ed5da78602a020c991775b0aff04"
+
 [[package]]
 name = "cc"
 version = "1.2.62"
@@ -71,12 +346,35 @@ dependencies = [
  "shlex",
 ]
 
+[[package]]
+name = "cesu8"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d43a04d8753f35258c91f8ec639f792891f748a1edbd759cf1dcea3382ad83c"
+
 [[package]]
 name = "cfg-if"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
+[[package]]
+name = "cfg_aliases"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f079e83a288787bcd14a6aea84cee5c87a67c5a3e660c30f557a3d24761b3527"
+
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+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d524456ba66e72eb8b115ff89e01e497f8e6d11d78b70b1aa13c0fbd97540a81"
+dependencies = [
+ "cfg-if",
+ "cpufeatures 0.3.0",
+ "rand_core 0.10.1",
+]
+
 [[package]]
 name = "chrono"
 version = "0.4.44"
@@ -91,18 +389,109 @@ dependencies = [
  "windows-link",
 ]
 
+[[package]]
+name = "clap"
+version = "4.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d91e0c145792ef73a6ad36d27c75ac09f1832222a3c209689d90f534685ee5b7"
+dependencies = [
+ "clap_builder",
+ "clap_derive",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f09628afdcc538b57f3c6341e9c8e9970f18e4a481690a64974d7023bd33548b"
+dependencies = [
+ "anstream",
+ "anstyle",
+ "clap_lex",
+ "strsim",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d012d2b9d65aca7f18f4d9878a045bc17899bba951561ba5ec3c2ba1eed9a061"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn 3.0.2",
+]
+
+[[package]]
+name = "clap_lex"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c8d4a3bb8b1e0c1050499d1815f5ab16d04f0959b233085fb31653fbfc9d98f9"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
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+version = "4.6.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba5a308b75df32fe02788e748662718f03fde005016435c444eea572398219fd"
+dependencies = [
+ "bytes",
+ "memchr",
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+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d52eff69cd5e647efe296129160853a42795992097e8af39800e1060caeea9b"
 
+[[package]]
+name = "core-foundation"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2a6cd9ae233e7f62ba4e9353e81a88df7fc8a5987b8d445b4d90c879bd156f6"
+dependencies = [
+ "core-foundation-sys",
+ "libc",
+]
+
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 version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
 
+[[package]]
+name = "cpu-time"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e9e393a7668fe1fad3075085b86c781883000b4ede868f43627b34a87c8b7ded"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "cpufeatures"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
+dependencies = [
+ "libc",
+]
+
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 name = "cpufeatures"
 version = "0.3.0"
@@ -127,30 +516,406 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "217698eaf96b4a3f0bc4f3662aaa55bdf913cd54d7204591faa790070c6d0853"
 
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+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1137cd7e7fc0fb5d3c5a8678be38ec56e819125d8d7907411fe24ccb943faca8"
+dependencies = [
+ "crossbeam-channel",
+ "crossbeam-deque",
+ "crossbeam-epoch",
+ "crossbeam-queue",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-channel"
+version = "0.5.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d85363c37faeca707aef026efa9f3b34d077bce547e48f770770625c6013679e"
+dependencies = [
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5181e0de7b61eb03a81e347d6dd8797bae9da5146707b51077e2d71a54ec0ceb"
+dependencies = [
+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d6914041f254d6e9176c01941b21115dcfb7089e55135a35411081bd106ef3f"
+dependencies = [
+ "crossbeam-utils",
+]
+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
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+
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+
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+ "icu_locale_core",
+ "writeable",
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+ "zerofrom",
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+ "zerovec",
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+dependencies = [
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+ "icu_properties",
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@@ -254,12 +1340,134 @@ dependencies = [
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 ]
 
+[[package]]
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+ "serde_core",
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+ "quote",
+ "syn 2.0.117",
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+ "cesu8",
+ "cfg-if",
+ "combine",
+ "jni-sys 0.3.1",
+ "log",
+ "thiserror 1.0.69",
+ "walkdir",
+ "windows-sys 0.45.0",
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+
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+dependencies = [
+ "cfg-if",
+ "combine",
+ "jni-macros",
+ "jni-sys 0.4.1",
+ "log",
+ "simd_cesu8",
+ "thiserror 2.0.18",
+ "walkdir",
+ "windows-link",
+]
+
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "rustc_version",
+ "simd_cesu8",
+ "syn 2.0.117",
+]
+
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+dependencies = [
+ "jni-sys 0.4.1",
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+
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+dependencies = [
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+
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+dependencies = [
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
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@@ -272,6 +1480,12 @@ dependencies = [
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 ]
 
+[[package]]
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+checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
+
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@@ -284,12 +1498,78 @@ version = "0.2.186"
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 checksum = "68ab91017fe16c622486840e4c83c9a37afeff978bd239b5293d61ece587de66"
 
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+
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+
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+
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+checksum = "224399e74b87b5f3557511d98dff8b14089b3dadafcab6bb93eab67d3aace965"
+dependencies = [
+ "scopeguard",
+]
+
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 source = "registry+https://github.com/rust-lang/crates.io-index"
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+checksum = "234cf4f4a04dc1f57e24b96cc0cd600cf2af460d4161ac5ecdd0af8e1f3b2a38"
+dependencies = [
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+
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+
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+checksum = "d640282b302c0bb0a2a8e0233ead9035e3bed871f0b7e81fe4a1ec829765db44"
+dependencies = [
+ "libc",
+]
+
+[[package]]
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+checksum = "d1525a2a28c7f4fa0fc98bb91ae755d1e2d1505079e05539e35bc876b5d65ae9"
+dependencies = [
+ "regex-automata",
+]
+
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+checksum = "0e7465ac9959cc2b1404e8e2367b43684a6d13790fe23056cc8c6c5a6b7bcb94"
+
 [[package]]
 name = "matrixmultiply"
 version = "0.3.10"
@@ -306,6 +1586,15 @@ version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
 
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+checksum = "d1219ed1b7f229ee7104d281dd01d6802fe28bb6e95d292942c4daacdeb798c0"
+dependencies = [
+ "libc",
+]
+
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@@ -315,6 +1604,173 @@ dependencies = [
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 ]
 
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bebe548a4e74b80ecb8dd058e352a91fed9e5685c49c5d3fa5062520c660c6c9"
+dependencies = [
+ "midstreamer-temporal-compare",
+ "nalgebra",
+ "ndarray 0.16.1",
+ "serde",
+ "thiserror 2.0.18",
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+
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+ "futures",
+ "js-sys",
+ "quinn",
+ "rcgen",
+ "rustls-platform-verifier 0.6.2",
+ "serde",
+ "thiserror 2.0.18",
+ "tokio",
+ "tracing",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
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+
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+ "tokio",
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+ "combine",
+ "libc",
+ "mach2",
+ "nix",
+ "sysctl",
+ "thiserror 2.0.18",
+ "widestring",
+ "windows",
+]
+
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+dependencies = [
+ "approx",
+ "matrixmultiply",
+ "nalgebra-macros",
+ "num-complex",
+ "num-rational",
+ "num-traits",
+ "simba",
+ "typenum",
+]
+
+[[package]]
+name = "nalgebra-macros"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "254a5372af8fc138e36684761d3c0cdb758a4410e938babcff1c860ce14ddbfc"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "465500e14ea162429d264d44189adc38b199b62b1c21eea9f69e4b73cb03bbf2"
+dependencies = [
+ "libc",
+ "log",
+ "openssl",
+ "openssl-probe",
+ "openssl-sys",
+ "schannel",
+ "security-framework",
+ "security-framework-sys",
+ "tempfile",
+]
+
 [[package]]
 name = "ndarray"
 version = "0.16.1"
@@ -328,6 +1784,7 @@ dependencies = [
  "portable-atomic",
  "portable-atomic-util",
  "rawpointer",
+ "serde",
 ]
 
 [[package]]
@@ -346,6 +1803,37 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "nix"
+version = "0.30.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74523f3a35e05aba87a1d978330aef40f67b0304ac79c1c00b294c9830543db6"
+dependencies = [
+ "bitflags 2.11.1",
+ "cfg-if",
+ "cfg_aliases",
+ "libc",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5"
+dependencies = [
+ "windows-sys 0.61.2",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c89e69e7e0f03bea5ef08013795c25018e101932225a656383bd384495ecc367"
+dependencies = [
+ "num-integer",
+ "num-traits",
+]
+
 [[package]]
 name = "num-complex"
 version = "0.4.6"
@@ -355,6 +1843,12 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "num-conv"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "521739c6d2bac4aa25192232afe6841231376b2b26d4d9fae5ecf8ca5772e441"
+
 [[package]]
 name = "num-integer"
 version = "0.1.46"
@@ -364,6 +1858,17 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "num-rational"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f83d14da390562dca69fc84082e73e548e1ad308d24accdedd2720017cb37824"
+dependencies = [
+ "num-bigint",
+ "num-integer",
+ "num-traits",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.19"
@@ -371,6 +1876,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
 dependencies = [
  "autocfg",
+ "libm",
+]
+
+[[package]]
+name = "num_cpus"
+version = "1.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91df4bbde75afed763b708b7eee1e8e7651e02d97f6d5dd763e89367e957b23b"
+dependencies = [
+ "hermit-abi",
+ "libc",
 ]
 
 [[package]]
@@ -385,7 +1901,7 @@ dependencies = [
  "num-integer",
  "num-traits",
  "pyo3",
- "rustc-hash",
+ "rustc-hash 1.1.0",
 ]
 
 [[package]]
@@ -394,12 +1910,141 @@ version = "1.21.4"
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 checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50"
 
+[[package]]
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+
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+checksum = "77823a27f0babb03091cb9ed9ef80af3b39dbc82f97e8fa530374b7dafd87a45"
+dependencies = [
+ "bitflags 2.11.1",
+ "cfg-if",
+ "foreign-types",
+ "libc",
+ "openssl-macros",
+ "openssl-sys",
+]
+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a948666b637a0f465e8564c73e89d4dde00d72d4d473cc972f390fc3dcee7d9c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
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+
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+
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+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
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@@ -745,7 +3812,7 @@ dependencies = [
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+ "syn 2.0.117",
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+ "thiserror 2.0.18",
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-version = "0.3.0"
+version = "0.3.1"
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+ "blake3",
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+ "thiserror 2.0.18",
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+[[package]]
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+ "wifi-densepose-bfld",
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+ "wifi-densepose-ruvector",
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+
+[[package]]
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+ "chrono",
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+ "serde_json",
+ "sha2",
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+ "wifi-densepose-sensing-server",
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+dependencies = [
+ "rufield-core",
+ "rufield-fusion",
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+ "serde",
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+ "tokio",
+ "tower-http",
+ "tracing",
+ "tracing-subscriber",
+ "ureq",
+ "wifi-densepose-bfld",
+ "wifi-densepose-engine",
+ "wifi-densepose-geo",
+ "wifi-densepose-hardware",
+ "wifi-densepose-rufield",
+ "wifi-densepose-signal",
+ "wifi-densepose-wifiscan",
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+ "ruvector-attention",
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+ "ruvector-solver",
+ "serde",
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+ "thiserror 2.0.18",
+ "uuid",
+ "wifi-densepose-core",
+ "wifi-densepose-ruvector",
+]
+
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+version = "0.3.1"
 dependencies = [
  "serde",
  "tracing",
 ]
 
+[[package]]
+name = "wifi-densepose-wifiscan"
+version = "0.3.1"
+dependencies = [
+ "serde",
+ "tracing",
+ "windows-sys 0.59.0",
+]
+
+[[package]]
+name = "wifi-densepose-worldgraph"
+version = "0.3.2"
+dependencies = [
+ "petgraph",
+ "serde",
+ "serde_json",
+ "thiserror 2.0.18",
+ "wifi-densepose-geo",
+]
+
+[[package]]
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+version = "0.3.9"
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+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
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+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
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+checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
+dependencies = [
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
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+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e686886bc078bc1b0b600cac0147aadb815089b6e4da64016cbd754b6342700f"
+dependencies = [
+ "windows-targets 0.48.5",
+]
+
 [[package]]
 name = "windows-core"
 version = "0.62.2"
@@ -856,7 +4174,7 @@ checksum = "053e2e040ab57b9dc951b72c264860db7eb3b0200ba345b4e4c3b14f67855ddf"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -867,7 +4185,7 @@ checksum = "3f316c4a2570ba26bbec722032c4099d8c8bc095efccdc15688708623367e358"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -894,6 +4212,229 @@ dependencies = [
  "windows-link",
 ]
 
+[[package]]
+name = "windows-sys"
+version = "0.45.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75283be5efb2831d37ea142365f009c02ec203cd29a3ebecbc093d52315b66d0"
+dependencies = [
+ "windows-targets 0.42.2",
+]
+
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+checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
+dependencies = [
+ "windows-targets 0.52.6",
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+
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+dependencies = [
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+
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+checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc"
+dependencies = [
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+
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+checksum = "8e5180c00cd44c9b1c88adb3693291f1cd93605ded80c250a75d472756b4d071"
+dependencies = [
+ "windows_aarch64_gnullvm 0.42.2",
+ "windows_aarch64_msvc 0.42.2",
+ "windows_i686_gnu 0.42.2",
+ "windows_i686_msvc 0.42.2",
+ "windows_x86_64_gnu 0.42.2",
+ "windows_x86_64_gnullvm 0.42.2",
+ "windows_x86_64_msvc 0.42.2",
+]
+
+[[package]]
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+ "windows_aarch64_msvc 0.48.5",
+ "windows_i686_gnu 0.48.5",
+ "windows_i686_msvc 0.48.5",
+ "windows_x86_64_gnu 0.48.5",
+ "windows_x86_64_gnullvm 0.48.5",
+ "windows_x86_64_msvc 0.48.5",
+]
+
+[[package]]
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+dependencies = [
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+ "windows_aarch64_msvc 0.52.6",
+ "windows_i686_gnu 0.52.6",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc 0.52.6",
+ "windows_x86_64_gnu 0.52.6",
+ "windows_x86_64_gnullvm 0.52.6",
+ "windows_x86_64_msvc 0.52.6",
+]
+
+[[package]]
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+
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+[[package]]
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+[[package]]
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+
+[[package]]
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+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
+
+[[package]]
+name = "winnow"
+version = "0.7.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df79d97927682d2fd8adb29682d1140b343be4ac0f08fd68b7765d9c059d3945"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "wit-bindgen"
 version = "0.51.0"
@@ -930,7 +4471,7 @@ dependencies = [
  "heck",
  "indexmap",
  "prettyplease",
- "syn",
+ "syn 2.0.117",
  "wasm-metadata",
  "wit-bindgen-core",
  "wit-component",
@@ -946,7 +4487,7 @@ dependencies = [
  "prettyplease",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.117",
  "wit-bindgen-core",
  "wit-bindgen-rust",
 ]
@@ -958,7 +4499,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9d66ea20e9553b30172b5e831994e35fbde2d165325bec84fc43dbf6f4eb9cb2"
 dependencies = [
  "anyhow",
- "bitflags",
+ "bitflags 2.11.1",
  "indexmap",
  "log",
  "serde",
@@ -988,6 +4529,124 @@ dependencies = [
  "wasmparser",
 ]
 
+[[package]]
+name = "writeable"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ffae5123b2d3fc086436f8834ae3ab053a283cfac8fe0a0b8eaae044768a4c4"
+
+[[package]]
+name = "yasna"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e17bb3549cc1321ae1296b9cdc2698e2b6cb1992adfa19a8c72e5b7a738f44cd"
+dependencies = [
+ "time",
+]
+
+[[package]]
+name = "yoke"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "709fe23a0424b6a435d82152b1bd3fdfb0833487d5fa90d05d42762a9891fef5"
+dependencies = [
+ "stable_deref_trait",
+ "yoke-derive",
+ "zerofrom",
+]
+
+[[package]]
+name = "yoke-derive"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de844c262c8848816172cef550288e7dc6c7b7814b4ee56b3e1553f275f1858e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+ "synstructure",
+]
+
+[[package]]
+name = "zerocopy"
+version = "0.8.55"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5a105cd7b140f6eeec8acff2ea38135d3cab283ada58540f629fe51e46696eb"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
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+version = "0.8.55"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
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+ "zerofrom-derive",
+]
+
+[[package]]
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+ "synstructure",
+]
+
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+
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+ "yoke",
+ "zerofrom",
+]
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+dependencies = [
+ "yoke",
+ "zerofrom",
+ "zerovec-derive",
+]
+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "zmij"
 version = "1.0.21"
diff --git a/python/Cargo.toml b/python/Cargo.toml
index c781ac53..de69defc 100644
--- a/python/Cargo.toml
+++ b/python/Cargo.toml
@@ -23,6 +23,15 @@ name = "wifi_densepose_native"
 crate-type = ["cdylib", "rlib"]
 path = "src/lib.rs"
 
+# ADR-185 §3.1 — optional pip extras map to Cargo features so the
+# default wheel links none of the SOTA subsystems. P1 wires `aether`.
+[features]
+default = []
+# ADR-185 P1 — AETHER contrastive CSI embeddings. Pulls the backing
+# `wifi-densepose-sensing-server` crate (see the honest wheel-size note
+# on that dep below).
+aether = ["dep:wifi-densepose-sensing-server"]
+
 [dependencies]
 # PyO3 with abi3-py310 — one compiled binary covers Python 3.10, 3.11,
 # 3.12, 3.13, and any future 3.x that keeps the stable ABI (ADR-117 §5.4).
@@ -50,6 +59,24 @@ wifi-densepose-bfld = { version = "0.3.0", path = "../v2/crates/wifi-densepose-b
 # the future P3 CsiFrame numpy round-trip.
 numpy = "0.22"
 
+# ADR-185 P1 — AETHER backing crate (contrastive `embedding` module,
+# ADR-024). Optional + gated behind the `aether` feature.
+#
+# HONEST WHEEL-SIZE NOTE (ADR-185 §9 / Open Q §11.1): this crate is an
+# Axum/tokio server crate. `default-features = false` does NOT drop
+# tokio/axum here — they are non-optional deps (only `mqtt`/`matter`
+# are features). So an `[aether]` wheel currently links the full
+# sensing-server dependency tree, breaking the ADR-117 §5.4 ≤5 MB
+# budget. The ADR-sanctioned fix is to hoist `embedding.rs` (+ its
+# `graph_transformer`/`sona` siblings) into a leaf crate so the wheel
+# links only pure compute — a Rust-side refactor inside
+# `wifi-densepose-sensing-server`, owned by another agent this session.
+# P1 binds against the real code and proves parity; the leaf-crate
+# hoist is the required pre-release follow-up.
+wifi-densepose-sensing-server = { version = "0.3.0", path = "../v2/crates/wifi-densepose-sensing-server", optional = true, default-features = false }
+
 [dev-dependencies]
-# Doc-test infrastructure for the Python-facing examples in the bound
-# Rust functions. Lands properly in P2 once #[pyfunction]s exist to test.
+# ADR-185 §4.1 parity harness — SHA-256 the native-Rust reference
+# embedding and read the committed golden fixture.
+sha2 = "0.10"
+serde_json = "1"
diff --git a/python/pyproject.toml b/python/pyproject.toml
index 92089b58..a4d09486 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -48,6 +48,12 @@ client = [
     "websockets>=12.0",
     "paho-mqtt>=2.1",
 ]
+# ADR-185 P1 — AETHER contrastive embeddings. Unlike `client`, this
+# extra carries no pure-Python deps: it is a marker for a *compiled*
+# feature build (`maturin ... --features aether` / a cibuildwheel
+# feature axis, ADR-185 §3.1). Installing the base wheel and importing
+# `wifi_densepose.aether` raises a clear ImportError naming this extra.
+aether = []
 # Developer dependencies for running the test suite + lint.
 dev = [
     "pytest>=8.0",
diff --git a/python/src/bindings/aether.rs b/python/src/bindings/aether.rs
new file mode 100644
index 00000000..373db340
--- /dev/null
+++ b/python/src/bindings/aether.rs
@@ -0,0 +1,242 @@
+//! ADR-185 P1 — PyO3 bindings for AETHER contrastive CSI embeddings.
+//!
+//! Surfaces the **pure-sync** contrastive-embedding compute from
+//! `wifi-densepose-sensing-server::embedding` (ADR-024) into
+//! `wifi_densepose.aether`:
+//!
+//! - `AetherConfig`      — wraps `EmbeddingConfig` (d_model / d_proj /
+//!                          temperature / normalize)
+//! - `CsiAugmenter`      — SimCLR-style augmentation pair generator
+//! - `EmbeddingExtractor`— backbone + projection → 128-dim L2-normed embedding
+//! - `info_nce_loss`     — NT-Xent contrastive loss (module function)
+//! - `cosine_similarity` — re-ID similarity helper (module function)
+//!
+//! ## Honest scope vs ADR-185 §3.2
+//!
+//! ADR-185 §3.2 names an aspirational surface (`aether_loss` returning
+//! VICReg components, `alignment_metric`, `uniformity_metric`,
+//! `forward_dual`, an `AetherConfig` with `vicreg_*` fields). Those do
+//! **not** exist in the backing crate at HEAD — `embedding.rs` exposes
+//! `EmbeddingConfig { d_model, d_proj, temperature, normalize }`,
+//! `info_nce_loss` (plain `f32`), `CsiAugmenter::augment_pair`, and
+//! `EmbeddingExtractor::extract`. This binding surfaces **what actually
+//! exists** rather than fabricating the ADR's wished-for API. The
+//! VICReg loss / metric surface is a Rust-side gap, not a binding gap.
+//!
+//! ## GIL release strategy (per ADR-117 §7, matching bindings/vitals.rs)
+//!
+//! `extract`, `augment_pair`, and `info_nce_loss` are pure-sync matrix
+//! ops touching no Python objects, so they run inside
+//! `py.allow_threads(|| ...)`.
+
+use pyo3::prelude::*;
+
+use wifi_densepose_sensing_server::embedding::{
+    info_nce_loss as rust_info_nce_loss, CsiAugmenter, EmbeddingConfig, EmbeddingExtractor,
+};
+use wifi_densepose_sensing_server::graph_transformer::TransformerConfig;
+
+// ─── AetherConfig ────────────────────────────────────────────────────
+
+/// Configuration for the contrastive embedding model.
+///
+/// Python:
+/// ```python
+/// from wifi_densepose.aether import AetherConfig
+/// cfg = AetherConfig(d_model=64, d_proj=128, temperature=0.07, normalize=True)
+/// ```
+#[pyclass(frozen, name = "AetherConfig")]
+#[derive(Clone)]
+pub struct PyAetherConfig {
+    inner: EmbeddingConfig,
+}
+
+#[pymethods]
+impl PyAetherConfig {
+    #[new]
+    #[pyo3(signature = (d_model=64, d_proj=128, temperature=0.07, normalize=true))]
+    fn new(d_model: usize, d_proj: usize, temperature: f32, normalize: bool) -> Self {
+        Self {
+            inner: EmbeddingConfig {
+                d_model,
+                d_proj,
+                temperature,
+                normalize,
+            },
+        }
+    }
+
+    #[getter]
+    fn d_model(&self) -> usize {
+        self.inner.d_model
+    }
+
+    #[getter]
+    fn d_proj(&self) -> usize {
+        self.inner.d_proj
+    }
+
+    #[getter]
+    fn temperature(&self) -> f32 {
+        self.inner.temperature
+    }
+
+    #[getter]
+    fn normalize(&self) -> bool {
+        self.inner.normalize
+    }
+
+    fn __repr__(&self) -> String {
+        format!(
+            "AetherConfig(d_model={}, d_proj={}, temperature={}, normalize={})",
+            self.inner.d_model, self.inner.d_proj, self.inner.temperature, self.inner.normalize,
+        )
+    }
+}
+
+// ─── CsiAugmenter ────────────────────────────────────────────────────
+
+/// SimCLR-style CSI augmentation. `augment_pair` returns two distinct
+/// augmented views of the same CSI window for contrastive pretraining.
+///
+/// Python:
+/// ```python
+/// from wifi_densepose.aether import CsiAugmenter
+/// aug = CsiAugmenter()
+/// view_a, view_b = aug.augment_pair(window, seed=42)
+/// ```
+#[pyclass(name = "CsiAugmenter")]
+pub struct PyCsiAugmenter {
+    inner: CsiAugmenter,
+}
+
+#[pymethods]
+impl PyCsiAugmenter {
+    #[new]
+    fn new() -> Self {
+        Self {
+            inner: CsiAugmenter::new(),
+        }
+    }
+
+    /// Produce two augmented views `(view_a, view_b)` of `window`
+    /// (frames × subcarriers) using the deterministic `seed`. GIL is
+    /// released during augmentation.
+    fn augment_pair(
+        &self,
+        py: Python<'_>,
+        window: Vec<Vec<f32>>,
+        seed: u64,
+    ) -> (Vec<Vec<f32>>, Vec<Vec<f32>>) {
+        py.allow_threads(|| self.inner.augment_pair(&window, seed))
+    }
+
+    fn __repr__(&self) -> String {
+        "CsiAugmenter(SimCLR-style CSI augmentation)".to_string()
+    }
+}
+
+// ─── EmbeddingExtractor ──────────────────────────────────────────────
+
+/// Full AETHER embedding extractor: CSI→pose transformer backbone +
+/// projection head → a `d_proj`-dim (default 128) L2-normalized
+/// embedding. Weights are deterministically seeded, so `embed` is a
+/// pure function of its input for a fixed config.
+///
+/// Python:
+/// ```python
+/// from wifi_densepose.aether import AetherConfig, EmbeddingExtractor
+/// ext = EmbeddingExtractor(n_subcarriers=56, config=AetherConfig())
+/// emb = ext.embed(window)          # list[float], len == config.d_proj
+/// ```
+#[pyclass(name = "EmbeddingExtractor")]
+pub struct PyEmbeddingExtractor {
+    inner: EmbeddingExtractor,
+    embedding_dim: usize,
+}
+
+#[pymethods]
+impl PyEmbeddingExtractor {
+    /// Construct an extractor. The transformer backbone is sized from
+    /// `n_subcarriers` and `config.d_model`; `config.d_proj` sets the
+    /// embedding dimension.
+    #[new]
+    #[pyo3(signature = (n_subcarriers, config, n_keypoints=17, n_heads=4, n_gnn_layers=2))]
+    fn new(
+        n_subcarriers: usize,
+        config: PyAetherConfig,
+        n_keypoints: usize,
+        n_heads: usize,
+        n_gnn_layers: usize,
+    ) -> Self {
+        let e_config = config.inner.clone();
+        let t_config = TransformerConfig {
+            n_subcarriers,
+            n_keypoints,
+            d_model: e_config.d_model,
+            n_heads,
+            n_gnn_layers,
+        };
+        let embedding_dim = e_config.d_proj;
+        Self {
+            inner: EmbeddingExtractor::new(t_config, e_config),
+            embedding_dim,
+        }
+    }
+
+    /// Extract an embedding from a CSI window (frames × subcarriers).
+    /// Returns a `d_proj`-length vector (L2-normed when the config's
+    /// `normalize` is set). GIL released during the forward pass.
+    fn embed(&mut self, py: Python<'_>, csi_features: Vec<Vec<f32>>) -> Vec<f32> {
+        py.allow_threads(|| self.inner.extract(&csi_features))
+    }
+
+    #[getter]
+    fn embedding_dim(&self) -> usize {
+        self.embedding_dim
+    }
+
+    fn __repr__(&self) -> String {
+        format!("EmbeddingExtractor(embedding_dim={})", self.embedding_dim)
+    }
+}
+
+// ─── Module functions ────────────────────────────────────────────────
+
+/// InfoNCE (NT-Xent) contrastive loss between two batches of embeddings.
+/// Delegates to the identical Rust implementation. GIL released.
+#[pyfunction]
+#[pyo3(signature = (embeddings_a, embeddings_b, temperature=0.07))]
+fn info_nce_loss(
+    py: Python<'_>,
+    embeddings_a: Vec<Vec<f32>>,
+    embeddings_b: Vec<Vec<f32>>,
+    temperature: f32,
+) -> f32 {
+    py.allow_threads(|| rust_info_nce_loss(&embeddings_a, &embeddings_b, temperature))
+}
+
+/// Cosine similarity between two embeddings — the re-ID scoring
+/// primitive. Byte-identical to the private `cosine_similarity` in the
+/// backing crate (same dot-product / norm formula, `f32`).
+#[pyfunction]
+fn cosine_similarity(a: Vec<f32>, b: Vec<f32>) -> f32 {
+    let n = a.len().min(b.len());
+    let dot: f32 = (0..n).map(|i| a[i] * b[i]).sum();
+    let na = (0..n).map(|i| a[i] * a[i]).sum::<f32>().sqrt();
+    let nb = (0..n).map(|i| b[i] * b[i]).sum::<f32>().sqrt();
+    if na > 1e-10 && nb > 1e-10 {
+        dot / (na * nb)
+    } else {
+        0.0
+    }
+}
+
+pub fn register(m: &Bound<'_, PyModule>) -> PyResult<()> {
+    m.add_class::<PyAetherConfig>()?;
+    m.add_class::<PyCsiAugmenter>()?;
+    m.add_class::<PyEmbeddingExtractor>()?;
+    m.add_function(wrap_pyfunction!(info_nce_loss, m)?)?;
+    m.add_function(wrap_pyfunction!(cosine_similarity, m)?)?;
+    Ok(())
+}
diff --git a/python/src/lib.rs b/python/src/lib.rs
index b30faf75..520007cd 100644
--- a/python/src/lib.rs
+++ b/python/src/lib.rs
@@ -17,6 +17,8 @@
 use pyo3::prelude::*;
 
 mod bindings {
+    #[cfg(feature = "aether")]
+    pub mod aether;
     pub mod bfld;
     pub mod keypoint;
     pub mod pose;
@@ -43,6 +45,8 @@ fn build_features() -> Vec<&'static str> {
     feats.push("p2-pose-bindings"); // BoundingBox + PersonPose + PoseEstimate
     feats.push("p3-vitals-bindings"); // BreathingExtractor + HeartRateExtractor + VitalEstimate
     feats.push("p3.5-bfld-bindings"); // BfldFrame + BfldReport + BfldKind (stub Rust)
+    #[cfg(feature = "aether")]
+    feats.push("p6-aether-bindings"); // ADR-185 P1 — AETHER contrastive embeddings
     feats
 }
 
@@ -85,5 +89,12 @@ fn wifi_densepose_native(m: &Bound<'_, PyModule>) -> PyResult<()> {
     // the published `wifi-densepose-bfld 0.3.0` crate, not the Python port).
     // Closes ADR-125 §2.1.d at the binding boundary.
     bindings::privacy_gate::register(m)?;
+
+    // ADR-185 P1 — AETHER contrastive CSI embedding bindings, compiled
+    // and registered only under the `aether` feature so the default
+    // wheel links none of the sensing-server dependency tree.
+    #[cfg(feature = "aether")]
+    bindings::aether::register(m)?;
+
     Ok(())
 }
diff --git a/python/tests/aether_parity.rs b/python/tests/aether_parity.rs
new file mode 100644
index 00000000..0c833987
--- /dev/null
+++ b/python/tests/aether_parity.rs
@@ -0,0 +1,99 @@
+//! ADR-185 §4.1 — AETHER bit-for-bit parity: native-Rust reference half.
+//!
+//! Produces the golden 128-dim embedding by calling the canonical
+//! `wifi-densepose-sensing-server::embedding` code DIRECTLY (no PyO3),
+//! for the committed `tests/golden/aether_input.json` fixture, and locks
+//! its SHA-256 into `tests/golden/aether_embedding.sha256`.
+//!
+//! The pytest half (`tests/test_aether.py`) independently runs the same
+//! fixture through the Python binding and asserts the identical hash —
+//! together they prove the binding is byte-identical to native Rust.
+//!
+//! Regeneration (only when the Rust subsystem intentionally changes):
+//! delete `tests/golden/aether_embedding.sha256` and re-run
+//! `cargo test --features aether`.
+#![cfg(feature = "aether")]
+
+use std::fs;
+use std::path::PathBuf;
+
+use sha2::{Digest, Sha256};
+use wifi_densepose_sensing_server::embedding::{EmbeddingConfig, EmbeddingExtractor};
+use wifi_densepose_sensing_server::graph_transformer::TransformerConfig;
+
+fn golden_dir() -> PathBuf {
+    PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .join("tests")
+        .join("golden")
+}
+
+fn load_input() -> Vec<Vec<f32>> {
+    let raw = fs::read_to_string(golden_dir().join("aether_input.json"))
+        .expect("read aether_input.json fixture");
+    let rows: Vec<Vec<f64>> = serde_json::from_str(&raw).expect("parse aether_input.json");
+    rows.into_iter()
+        .map(|row| row.into_iter().map(|x| x as f32).collect())
+        .collect()
+}
+
+/// Build the extractor identically to the Python binding's default
+/// construction: `AetherConfig()` + `EmbeddingExtractor(n_subcarriers=56, cfg)`.
+fn embed_native(input: &[Vec<f32>]) -> Vec<f32> {
+    let e_config = EmbeddingConfig {
+        d_model: 64,
+        d_proj: 128,
+        temperature: 0.07,
+        normalize: true,
+    };
+    let t_config = TransformerConfig {
+        n_subcarriers: 56,
+        n_keypoints: 17,
+        d_model: 64,
+        n_heads: 4,
+        n_gnn_layers: 2,
+    };
+    let mut ext = EmbeddingExtractor::new(t_config, e_config);
+    ext.extract(input)
+}
+
+fn sha256_le(embedding: &[f32]) -> String {
+    let mut hasher = Sha256::new();
+    for &x in embedding {
+        hasher.update(x.to_le_bytes());
+    }
+    hasher
+        .finalize()
+        .iter()
+        .map(|b| format!("{b:02x}"))
+        .collect()
+}
+
+#[test]
+fn native_embedding_is_128_dim_unit_norm() {
+    let emb = embed_native(&load_input());
+    assert_eq!(emb.len(), 128, "AETHER embedding must be 128-dim");
+    let norm: f32 = emb.iter().map(|x| x * x).sum::<f32>().sqrt();
+    assert!(
+        (norm - 1.0).abs() < 1e-4,
+        "embedding must be L2-normalized, got norm={norm}"
+    );
+}
+
+#[test]
+fn native_embedding_matches_committed_golden() {
+    let emb = embed_native(&load_input());
+    let got = sha256_le(&emb);
+    let path = golden_dir().join("aether_embedding.sha256");
+    match fs::read_to_string(&path) {
+        Ok(expected) => assert_eq!(
+            got,
+            expected.trim(),
+            "native AETHER embedding hash drifted from committed golden \
+             (intentional? delete the .sha256 and regenerate)"
+        ),
+        Err(_) => {
+            fs::write(&path, &got).expect("write golden sha256");
+            panic!("no committed golden found; wrote {got}. Re-run to verify parity.");
+        }
+    }
+}
diff --git a/python/tests/golden/aether_embedding.sha256 b/python/tests/golden/aether_embedding.sha256
new file mode 100644
index 00000000..f06d0f88
--- /dev/null
+++ b/python/tests/golden/aether_embedding.sha256
@@ -0,0 +1 @@
+b315bd0c19f44409f9dec5677c30dec657327e46df81c249ddbd509e0ba541c2
\ No newline at end of file
diff --git a/python/tests/golden/aether_input.json b/python/tests/golden/aether_input.json
new file mode 100644
index 00000000..80bdbc63
--- /dev/null
+++ b/python/tests/golden/aether_input.json
@@ -0,0 +1 @@
+[[0.0, 0.00390625, 0.0078125, 0.01171875, 0.015625, 0.01953125, 0.0234375, 0.02734375, 0.03125, 0.03515625, 0.0390625, 0.04296875, 0.046875, 0.05078125, 0.0546875, 0.05859375, 0.0625, 0.06640625, 0.0703125, 0.07421875, 0.078125, 0.08203125, 0.0859375, 0.08984375, 0.09375, 0.09765625, 0.1015625, 0.10546875, 0.109375, 0.11328125, 0.1171875, 0.12109375, 0.125, 0.12890625, 0.1328125, 0.13671875, 0.140625, 0.14453125, 0.1484375, 0.15234375, 0.15625, 0.16015625, 0.1640625, 0.16796875, 0.171875, 0.17578125, 0.1796875, 0.18359375, 0.1875, 0.19140625, 0.1953125, 0.19921875, 0.203125, 0.20703125, 0.2109375, 0.21484375], [0.21875, 0.22265625, 0.2265625, 0.23046875, 0.234375, 0.23828125, 0.2421875, 0.24609375, 0.25, 0.25390625, 0.2578125, 0.26171875, 0.265625, 0.26953125, 0.2734375, 0.27734375, 0.28125, 0.28515625, 0.2890625, 0.29296875, 0.296875, 0.30078125, 0.3046875, 0.30859375, 0.3125, 0.31640625, 0.3203125, 0.32421875, 0.328125, 0.33203125, 0.3359375, 0.33984375, 0.34375, 0.34765625, 0.3515625, 0.35546875, 0.359375, 0.36328125, 0.3671875, 0.37109375, 0.375, 0.37890625, 0.3828125, 0.38671875, 0.390625, 0.39453125, 0.3984375, 0.40234375, 0.40625, 0.41015625, 0.4140625, 0.41796875, 0.421875, 0.42578125, 0.4296875, 0.43359375], [0.4375, 0.44140625, 0.4453125, 0.44921875, 0.453125, 0.45703125, 0.4609375, 0.46484375, 0.46875, 0.47265625, 0.4765625, 0.48046875, 0.484375, 0.48828125, 0.4921875, 0.49609375, 0.5, 0.50390625, 0.5078125, 0.51171875, 0.515625, 0.51953125, 0.5234375, 0.52734375, 0.53125, 0.53515625, 0.5390625, 0.54296875, 0.546875, 0.55078125, 0.5546875, 0.55859375, 0.5625, 0.56640625, 0.5703125, 0.57421875, 0.578125, 0.58203125, 0.5859375, 0.58984375, 0.59375, 0.59765625, 0.6015625, 0.60546875, 0.609375, 0.61328125, 0.6171875, 0.62109375, 0.625, 0.62890625, 0.6328125, 0.63671875, 0.640625, 0.64453125, 0.6484375, 0.65234375], [0.65625, 0.66015625, 0.6640625, 0.66796875, 0.671875, 0.67578125, 0.6796875, 0.68359375, 0.6875, 0.69140625, 0.6953125, 0.69921875, 0.703125, 0.70703125, 0.7109375, 0.71484375, 0.71875, 0.72265625, 0.7265625, 0.73046875, 0.734375, 0.73828125, 0.7421875, 0.74609375, 0.75, 0.75390625, 0.7578125, 0.76171875, 0.765625, 0.76953125, 0.7734375, 0.77734375, 0.78125, 0.78515625, 0.7890625, 0.79296875, 0.796875, 0.80078125, 0.8046875, 0.80859375, 0.8125, 0.81640625, 0.8203125, 0.82421875, 0.828125, 0.83203125, 0.8359375, 0.83984375, 0.84375, 0.84765625, 0.8515625, 0.85546875, 0.859375, 0.86328125, 0.8671875, 0.87109375], [0.875, 0.87890625, 0.8828125, 0.88671875, 0.890625, 0.89453125, 0.8984375, 0.90234375, 0.90625, 0.91015625, 0.9140625, 0.91796875, 0.921875, 0.92578125, 0.9296875, 0.93359375, 0.9375, 0.94140625, 0.9453125, 0.94921875, 0.953125, 0.95703125, 0.9609375, 0.96484375, 0.96875, 0.97265625, 0.9765625, 0.98046875, 0.984375, 0.98828125, 0.9921875, 0.99609375, 0.0, 0.00390625, 0.0078125, 0.01171875, 0.015625, 0.01953125, 0.0234375, 0.02734375, 0.03125, 0.03515625, 0.0390625, 0.04296875, 0.046875, 0.05078125, 0.0546875, 0.05859375, 0.0625, 0.06640625, 0.0703125, 0.07421875, 0.078125, 0.08203125, 0.0859375, 0.08984375], [0.09375, 0.09765625, 0.1015625, 0.10546875, 0.109375, 0.11328125, 0.1171875, 0.12109375, 0.125, 0.12890625, 0.1328125, 0.13671875, 0.140625, 0.14453125, 0.1484375, 0.15234375, 0.15625, 0.16015625, 0.1640625, 0.16796875, 0.171875, 0.17578125, 0.1796875, 0.18359375, 0.1875, 0.19140625, 0.1953125, 0.19921875, 0.203125, 0.20703125, 0.2109375, 0.21484375, 0.21875, 0.22265625, 0.2265625, 0.23046875, 0.234375, 0.23828125, 0.2421875, 0.24609375, 0.25, 0.25390625, 0.2578125, 0.26171875, 0.265625, 0.26953125, 0.2734375, 0.27734375, 0.28125, 0.28515625, 0.2890625, 0.29296875, 0.296875, 0.30078125, 0.3046875, 0.30859375], [0.3125, 0.31640625, 0.3203125, 0.32421875, 0.328125, 0.33203125, 0.3359375, 0.33984375, 0.34375, 0.34765625, 0.3515625, 0.35546875, 0.359375, 0.36328125, 0.3671875, 0.37109375, 0.375, 0.37890625, 0.3828125, 0.38671875, 0.390625, 0.39453125, 0.3984375, 0.40234375, 0.40625, 0.41015625, 0.4140625, 0.41796875, 0.421875, 0.42578125, 0.4296875, 0.43359375, 0.4375, 0.44140625, 0.4453125, 0.44921875, 0.453125, 0.45703125, 0.4609375, 0.46484375, 0.46875, 0.47265625, 0.4765625, 0.48046875, 0.484375, 0.48828125, 0.4921875, 0.49609375, 0.5, 0.50390625, 0.5078125, 0.51171875, 0.515625, 0.51953125, 0.5234375, 0.52734375], [0.53125, 0.53515625, 0.5390625, 0.54296875, 0.546875, 0.55078125, 0.5546875, 0.55859375, 0.5625, 0.56640625, 0.5703125, 0.57421875, 0.578125, 0.58203125, 0.5859375, 0.58984375, 0.59375, 0.59765625, 0.6015625, 0.60546875, 0.609375, 0.61328125, 0.6171875, 0.62109375, 0.625, 0.62890625, 0.6328125, 0.63671875, 0.640625, 0.64453125, 0.6484375, 0.65234375, 0.65625, 0.66015625, 0.6640625, 0.66796875, 0.671875, 0.67578125, 0.6796875, 0.68359375, 0.6875, 0.69140625, 0.6953125, 0.69921875, 0.703125, 0.70703125, 0.7109375, 0.71484375, 0.71875, 0.72265625, 0.7265625, 0.73046875, 0.734375, 0.73828125, 0.7421875, 0.74609375]]
\ No newline at end of file
diff --git a/python/tests/test_aether.py b/python/tests/test_aether.py
new file mode 100644
index 00000000..fc9a7c20
--- /dev/null
+++ b/python/tests/test_aether.py
@@ -0,0 +1,103 @@
+"""ADR-185 P1 — AETHER binding tests, incl. the §4.1 bit-for-bit parity gate.
+
+The parity test packs the binding's embedding to little-endian f32 bytes
+and asserts its SHA-256 equals the committed golden produced by the
+native-Rust reference (`tests/aether_parity.rs`). A mismatch is a
+release blocker, not a warning.
+"""
+
+from __future__ import annotations
+
+import hashlib
+import json
+import math
+import struct
+from pathlib import Path
+
+import pytest
+
+from wifi_densepose import aether
+
+GOLDEN = Path(__file__).parent / "golden"
+
+
+def load_input() -> list[list[float]]:
+    return json.loads((GOLDEN / "aether_input.json").read_text())
+
+
+def build_extractor() -> aether.EmbeddingExtractor:
+    # Must match the native-Rust reference construction exactly.
+    cfg = aether.AetherConfig(d_model=64, d_proj=128, temperature=0.07, normalize=True)
+    return aether.EmbeddingExtractor(n_subcarriers=56, config=cfg)
+
+
+def test_config_roundtrips_fields() -> None:
+    cfg = aether.AetherConfig(d_model=64, d_proj=128, temperature=0.07, normalize=True)
+    assert cfg.d_model == 64
+    assert cfg.d_proj == 128
+    assert abs(cfg.temperature - 0.07) < 1e-6
+    assert cfg.normalize is True
+
+
+def test_embedding_shape_and_unit_norm() -> None:
+    emb = build_extractor().embed(load_input())
+    assert len(emb) == 128
+    norm = math.sqrt(sum(x * x for x in emb))
+    assert abs(norm - 1.0) < 1e-4, f"expected unit-norm embedding, got {norm}"
+
+
+def test_bit_for_bit_parity_with_native_rust() -> None:
+    """The release-blocking §4.1 gate: binding output == native Rust, byte-for-byte."""
+    emb = build_extractor().embed(load_input())
+    packed = b"".join(struct.pack("<f", x) for x in emb)
+    got = hashlib.sha256(packed).hexdigest()
+    expected = (GOLDEN / "aether_embedding.sha256").read_text().strip()
+    assert got == expected, (
+        "Python binding embedding diverged from the native-Rust golden "
+        f"({got} != {expected}) — PyO3 marshalling is not byte-identical."
+    )
+
+
+def test_embedding_is_deterministic() -> None:
+    ext = build_extractor()
+    inp = load_input()
+    assert ext.embed(inp) == ext.embed(inp)
+
+
+def test_cosine_similarity_self_is_one() -> None:
+    v = [0.1 * i - 0.5 for i in range(32)]
+    assert abs(aether.cosine_similarity(v, v) - 1.0) < 1e-5
+
+
+def test_cosine_similarity_orthogonal_is_zero() -> None:
+    a = [1.0, 0.0, 0.0, 0.0]
+    b = [0.0, 1.0, 0.0, 0.0]
+    assert abs(aether.cosine_similarity(a, b)) < 1e-6
+
+
+def test_info_nce_loss_identical_batch_is_log_n() -> None:
+    # Identical embeddings → all similarities equal → loss == ln(N).
+    emb = [[1.0, 0.0, 0.0]] * 4
+    loss = aether.info_nce_loss(emb, emb, 0.07)
+    assert abs(loss - math.log(4)) < 0.1
+
+
+def test_augment_pair_preserves_shape_and_differs() -> None:
+    window = load_input()
+    view_a, view_b = aether.CsiAugmenter().augment_pair(window, seed=42)
+    assert len(view_a) == len(window)
+    assert len(view_b) == len(window)
+    assert len(view_a[0]) == len(window[0])
+    differs = any(
+        abs(x - y) > 1e-6
+        for ra, rb in zip(view_a, view_b)
+        for x, y in zip(ra, rb)
+    )
+    assert differs, "augment_pair should return two distinct views"
+
+
+def test_base_wheel_import_error_message() -> None:
+    # This wheel HAS the extra, so the import succeeds; assert the guard
+    # message is present in source so the base-wheel path stays honest.
+    src = (Path(aether.__file__)).read_text()
+    assert "pip install wifi-densepose[aether]" in src
diff --git a/python/wifi_densepose/aether.py b/python/wifi_densepose/aether.py
new file mode 100644
index 00000000..1e56aed2
--- /dev/null
+++ b/python/wifi_densepose/aether.py
@@ -0,0 +1,47 @@
+"""AETHER — contrastive CSI embeddings & re-identification (ADR-024, ADR-185 P1).
+
+Self-supervised 128-dim L2-normalized embeddings for WiFi CSI: room
+fingerprinting, person re-identification, and anomaly scoring, computed
+entirely offline by the Rust core (no server, no network).
+
+Available **only** when the wheel was built with the ``[aether]`` extra::
+
+    pip install wifi-densepose[aether]
+
+Quick start::
+
+    from wifi_densepose.aether import AetherConfig, EmbeddingExtractor, cosine_similarity
+
+    ext = EmbeddingExtractor(n_subcarriers=56, config=AetherConfig())
+    a = ext.embed(window_a)          # list[float], length == config.d_proj (128)
+    b = ext.embed(window_b)
+    score = cosine_similarity(a, b)  # re-ID similarity in [-1, 1]
+"""
+
+from __future__ import annotations
+
+from wifi_densepose import _native
+
+# The AETHER symbols are compiled into `_native` only under the Rust
+# `aether` feature. In a base (`pip install wifi-densepose`) wheel they
+# are absent — surface a clear, actionable error naming the extra
+# (ADR-185 §6 acceptance criterion).
+if not hasattr(_native, "AetherConfig"):
+    raise ImportError(
+        "wifi_densepose.aether is not available in this wheel. "
+        "It requires the 'aether' extra:  pip install wifi-densepose[aether]"
+    )
+
+AetherConfig = _native.AetherConfig
+CsiAugmenter = _native.CsiAugmenter
+EmbeddingExtractor = _native.EmbeddingExtractor
+info_nce_loss = _native.info_nce_loss
+cosine_similarity = _native.cosine_similarity
+
+__all__ = [
+    "AetherConfig",
+    "CsiAugmenter",
+    "EmbeddingExtractor",
+    "info_nce_loss",
+    "cosine_similarity",
+]
diff --git a/python/wifi_densepose/aether.pyi b/python/wifi_densepose/aether.pyi
new file mode 100644
index 00000000..3cce9094
--- /dev/null
+++ b/python/wifi_densepose/aether.pyi
@@ -0,0 +1,54 @@
+"""Type stubs for the AETHER bindings (ADR-185 P1).
+
+Present only when the wheel is built with the ``[aether]`` extra. The
+top-level ``wifi_densepose`` package does not re-export these names, so
+``mypy --strict`` sees them only via ``from wifi_densepose.aether import ...``.
+"""
+
+from __future__ import annotations
+
+class AetherConfig:
+    def __init__(
+        self,
+        d_model: int = ...,
+        d_proj: int = ...,
+        temperature: float = ...,
+        normalize: bool = ...,
+    ) -> None: ...
+    @property
+    def d_model(self) -> int: ...
+    @property
+    def d_proj(self) -> int: ...
+    @property
+    def temperature(self) -> float: ...
+    @property
+    def normalize(self) -> bool: ...
+    def __repr__(self) -> str: ...
+
+class CsiAugmenter:
+    def __init__(self) -> None: ...
+    def augment_pair(
+        self, window: list[list[float]], seed: int
+    ) -> tuple[list[list[float]], list[list[float]]]: ...
+    def __repr__(self) -> str: ...
+
+class EmbeddingExtractor:
+    def __init__(
+        self,
+        n_subcarriers: int,
+        config: AetherConfig,
+        n_keypoints: int = ...,
+        n_heads: int = ...,
+        n_gnn_layers: int = ...,
+    ) -> None: ...
+    def embed(self, csi_features: list[list[float]]) -> list[float]: ...
+    @property
+    def embedding_dim(self) -> int: ...
+    def __repr__(self) -> str: ...
+
+def info_nce_loss(
+    embeddings_a: list[list[float]],
+    embeddings_b: list[list[float]],
+    temperature: float = ...,
+) -> float: ...
+def cosine_similarity(a: list[float], b: list[float]) -> float: ...