diff --git a/toolchain/triplet/VersionInfo.bzl b/toolchain/VersionInfo.bzl
similarity index 100%
rename from toolchain/triplet/VersionInfo.bzl
rename to toolchain/VersionInfo.bzl
diff --git a/toolchain/triplet/VersionedInfo.bzl b/toolchain/VersionedInfo.bzl
similarity index 100%
rename from toolchain/triplet/VersionedInfo.bzl
rename to toolchain/VersionedInfo.bzl
diff --git a/toolchain/constraint/BUILD.bazel b/toolchain/constraint/BUILD.bazel
index a35ed05a23e70f40d455b310b225645264a387bb..8b0c1d7a245995b6217ad6b37c20016120650219 100644
--- a/toolchain/constraint/BUILD.bazel
+++ b/toolchain/constraint/BUILD.bazel
@@ -1,3 +1,4 @@
+load("//toolchain/couplet:couplets.bzl", "COUPLETS")
 load("//toolchain/triplet:triplets.bzl", "TRIPLETS")
 
 [
@@ -9,6 +10,15 @@ load("//toolchain/triplet:triplets.bzl", "TRIPLETS")
     for t in TRIPLETS
 ]
 
+[
+    config_setting(
+        name = c.value,
+        constraint_values = c.constraints,
+        visibility = ["//visibility:public"],
+    )
+    for c in COUPLETS
+]
+
 alias(
     name = "local",
     actual = "//toolchain/local:constraint",
diff --git a/toolchain/couplet/BUILD.bazel b/toolchain/couplet/BUILD.bazel
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/toolchain/couplet/CoupletInfo.bzl b/toolchain/couplet/CoupletInfo.bzl
new file mode 100644
index 0000000000000000000000000000000000000000..23980010c6283bbb186f7159449b074975f06ff7
--- /dev/null
+++ b/toolchain/couplet/CoupletInfo.bzl
@@ -0,0 +1,52 @@
+load("@bazel_skylib//lib:types.bzl", "types")
+load("//toolchain:VersionedInfo.bzl", "VersionedInfo")
+load("//toolchain:split.bzl", "split")
+
+visibility("//toolchain/...")
+
+def init(value):
+    """
+    Initializes a `CoupletInfo` provider.
+
+    Processes `value` into the constituent parts.
+
+    Args:
+      value: A machine couplet which can be kebab-separated such as `aarch64-linux.6.13`
+
+    Returns:
+      A mapping of keywords for the `couplet_info` raw constructor.
+    """
+    if not types.is_string(value):
+        fail("`CoupletInfo.value` must be a `str`: {}".format(value))
+
+    cpu, vendor, os = split(value, "-", {
+        2: lambda c, o: (c, None, o),
+        3: lambda c, v, o: (c, v, o),
+    })
+
+    os = VersionedInfo(os)
+
+    constraints = [
+        "cpu:{}".format(cpu),
+        "os:{}".format(os.kind),
+    ]
+
+    if os.version:
+        constraints.append("os/{}:{}".format(os.kind, os.version.value))
+
+    return {
+        "value": value,
+        "cpu": cpu,
+        "vendor": vendor,
+        "os": os,
+        "constraints": tuple([
+            Label("//toolchain/constraint/{}".format(c))
+            for c in constraints
+        ]),
+    }
+
+CoupletInfo, couplet_info = provider(
+    "A machine couplet. Has the associated compatible Bazel constraints.",
+    fields = ("value", "cpu", "vendor", "os", "constraints"),
+    init = init,
+)
diff --git a/toolchain/couplet/couplets.bzl b/toolchain/couplet/couplets.bzl
new file mode 100644
index 0000000000000000000000000000000000000000..3a679f2a41d93f5b1693e5377df18f9e617fc241
--- /dev/null
+++ b/toolchain/couplet/couplets.bzl
@@ -0,0 +1,14 @@
+load("@local//:triplet.bzl", LOCAL = "TRIPLET")
+load(":CoupletInfo.bzl", "CoupletInfo")
+
+visibility("//toolchain/...")
+
+COUPLETS = (
+    CoupletInfo("{}-{}".format(LOCAL.cpu, LOCAL.os.value)),
+    CoupletInfo("arm64-linux"),
+    CoupletInfo("amd64-linux"),
+    CoupletInfo("arm64-windows"),
+    CoupletInfo("amd64-windows"),
+    CoupletInfo("arm64-macos"),
+    CoupletInfo("amd64-macos"),
+)
diff --git a/toolchain/couplet/defs.bzl b/toolchain/couplet/defs.bzl
new file mode 100644
index 0000000000000000000000000000000000000000..cabbcae2a04971aa2a660ece6f1c280f9fa89eb2
--- /dev/null
+++ b/toolchain/couplet/defs.bzl
@@ -0,0 +1,5 @@
+load(":CoupletInfo.bzl", _CoupletInfo = "CoupletInfo")
+
+visibility("public")
+
+ToolchainCoupletInfo = _CoupletInfo
diff --git a/toolchain/local/triplet/libc.bzl b/toolchain/local/triplet/libc.bzl
index 8847461d98d8926483bed16e45970dcdbbe7c075..828f3b546783af7be654fc8bad84f939f7bff27a 100644
--- a/toolchain/local/triplet/libc.bzl
+++ b/toolchain/local/triplet/libc.bzl
@@ -1,5 +1,5 @@
-load("//toolchain/triplet:split.bzl", "split")
-load("//toolchain/triplet:VersionedInfo.bzl", "VersionedInfo")
+load("//toolchain:split.bzl", "split")
+load("//toolchain:VersionedInfo.bzl", "VersionedInfo")
 
 visibility("//toolchain/local/triplet/...")
 
diff --git a/toolchain/local/triplet/os.bzl b/toolchain/local/triplet/os.bzl
index b2a9afcb70bd78209cb10d20b3d1f8a3c790502f..206238e6e601725f2d6624319030b1a73ed6d77b 100644
--- a/toolchain/local/triplet/os.bzl
+++ b/toolchain/local/triplet/os.bzl
@@ -1,5 +1,5 @@
-load("//toolchain/triplet:split.bzl", "split")
-load("//toolchain/triplet:VersionedInfo.bzl", "VersionedInfo")
+load("//toolchain:split.bzl", "split")
+load("//toolchain:VersionedInfo.bzl", "VersionedInfo")
 
 visibility("//toolchain/local/triplet/...")
 
diff --git a/toolchain/platform/BUILD.bazel b/toolchain/platform/BUILD.bazel
index dec518b8ec1566382a6a192d4aad0c39079ce121..7941575580d6b478a5af214ef044603aa11a2220 100644
--- a/toolchain/platform/BUILD.bazel
+++ b/toolchain/platform/BUILD.bazel
@@ -1,3 +1,4 @@
+load("//toolchain/couplet:couplets.bzl", "COUPLETS")
 load("//toolchain/triplet:triplets.bzl", "TRIPLETS")
 
 [
@@ -11,20 +12,11 @@ load("//toolchain/triplet:triplets.bzl", "TRIPLETS")
 
 [
     platform(
-        name = "{}-{}".format(cpu, os),
-        constraint_values = [
-            "//toolchain/constraint/cpu:{}".format(cpu),
-            "//toolchain/constraint/os:{}".format(os),
-        ],
-    )
-    for cpu, os in (
-        ("amd64", "linux"),
-        ("arm64", "linux"),
-        ("amd64", "windows"),
-        ("arm64", "windows"),
-        ("amd64", "macos"),
-        ("arm64", "macos"),
+        name = c.value,
+        constraint_values = c.constraints,
+        visibility = ["//visibility:public"],
     )
+    for c in COUPLETS
 ]
 
 alias(
diff --git a/toolchain/triplet/split.bzl b/toolchain/split.bzl
similarity index 100%
rename from toolchain/triplet/split.bzl
rename to toolchain/split.bzl
diff --git a/toolchain/triplet/TripletInfo.bzl b/toolchain/triplet/TripletInfo.bzl
index 99ee803ba1da869eece508f9db424ba120dfe202..bb92fac9abf302c20e763cb7208eba155351763f 100644
--- a/toolchain/triplet/TripletInfo.bzl
+++ b/toolchain/triplet/TripletInfo.bzl
@@ -1,6 +1,6 @@
 load("@bazel_skylib//lib:types.bzl", "types")
-load(":VersionedInfo.bzl", "VersionedInfo")
-load(":split.bzl", "split")
+load("//toolchain:VersionedInfo.bzl", "VersionedInfo")
+load("//toolchain:split.bzl", "split")
 
 visibility("//toolchain/...")
 
diff --git a/toolchain/triplet/triplets.bzl b/toolchain/triplet/triplets.bzl
index 213651e1d740060049826573cce1200242f863bb..163839193b6270117cab01634859ddcbb5dfc8d1 100644
--- a/toolchain/triplet/triplets.bzl
+++ b/toolchain/triplet/triplets.bzl
@@ -7,4 +7,10 @@ TRIPLETS = (
     LOCAL,
     TripletInfo("arm64-linux-gnu"),
     TripletInfo("amd64-linux-gnu"),
+    TripletInfo("arm64-linux-musl"),
+    TripletInfo("amd64-linux-musl"),
+    TripletInfo("arm64-macos-darwin"),
+    TripletInfo("amd64-macos-darwin"),
+    TripletInfo("arm64-windows-ucrt"),
+    TripletInfo("amd64-windows-ucrt"),
 )