diff --git a/pkgs/r/riscv-virt-rt.lua b/pkgs/r/riscv-virt-rt.lua
index d339d82..5442dab 100644
--- a/pkgs/r/riscv-virt-rt.lua
+++ b/pkgs/r/riscv-virt-rt.lua
@@ -52,6 +52,13 @@ package = {
                 },
                 sha256 = "71fc43daa4903d4f3037c204bd2b3be9aea56371b123a4529cc8c0c8c9b7f525",
             },
+            ["0.4.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/riscv-virt-rt/archive/refs/tags/0.4.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/riscv-virt-rt/releases/download/0.4.0/riscv-virt-rt-0.4.0.tar.gz",
+                },
+                sha256 = "2eef43aefb00905236a72d49924129c379e9d085fafdc4dd5c868e8a52b0414e",
+            },
         },
         macosx = {
             deps = { "xim:qemu-riscv@9.2.4-1" },
@@ -76,6 +83,13 @@ package = {
                 },
                 sha256 = "71fc43daa4903d4f3037c204bd2b3be9aea56371b123a4529cc8c0c8c9b7f525",
             },
+            ["0.4.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/riscv-virt-rt/archive/refs/tags/0.4.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/riscv-virt-rt/releases/download/0.4.0/riscv-virt-rt-0.4.0.tar.gz",
+                },
+                sha256 = "2eef43aefb00905236a72d49924129c379e9d085fafdc4dd5c868e8a52b0414e",
+            },
         },
         windows = {
             deps = { "xim:qemu-riscv@9.2.4-1" },
@@ -100,6 +114,13 @@ package = {
                 },
                 sha256 = "71fc43daa4903d4f3037c204bd2b3be9aea56371b123a4529cc8c0c8c9b7f525",
             },
+            ["0.4.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/riscv-virt-rt/archive/refs/tags/0.4.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/riscv-virt-rt/releases/download/0.4.0/riscv-virt-rt-0.4.0.tar.gz",
+                },
+                sha256 = "2eef43aefb00905236a72d49924129c379e9d085fafdc4dd5c868e8a52b0414e",
+            },
         },
     },
 
diff --git a/pkgs/s/std-freestanding-alloc-kal.lua b/pkgs/s/std-freestanding-alloc-kal.lua
new file mode 100644
index 0000000..bccf5d0
--- /dev/null
+++ b/pkgs/s/std-freestanding-alloc-kal.lua
@@ -0,0 +1,55 @@
+-- std-freestanding-alloc-kal — one of the allocator implementations the
+-- freestanding subset can bind.
+--
+-- Form A because mcpp looks for a package manifest at the package ROOT, and
+-- Form B would leave it one level down inside the tarball's wrap directory.
+--
+-- ⚠️ NO `deps`. The package depends on `openkal` for the C declarations it is
+-- written against, and that is an mcpp dependency declared in its own
+-- manifest — not an xim payload. Nothing here needs installing.
+--
+-- The consumer does not name this package. `std-freestanding`'s `alloc-kal`
+-- feature pulls it, because the feature both states the requirement and brings
+-- an implementation; see that package's `[feature-deps]`.
+package = {
+    spec        = "1",
+    namespace   = "mcpplibs",
+    name        = "std-freestanding-alloc-kal",
+    description = "The replaceable allocation functions for the freestanding subset, forwarded to openkal",
+    licenses    = {"Apache-2.0"},
+    repo        = "https://github.com/mcpplibs/std-freestanding-alloc-kal",
+    type        = "package",
+
+    xpm = {
+        linux = {
+            ["0.1.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/std-freestanding-alloc-kal/archive/refs/tags/0.1.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/std-freestanding-alloc-kal/releases/download/0.1.0/std-freestanding-alloc-kal-0.1.0.tar.gz",
+                },
+                sha256 = "6d3c746e5013655464fd47de54868e06c81a3563046d6bff58c9cb28e689e899",
+            },
+        },
+        macosx = {
+            ["0.1.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/std-freestanding-alloc-kal/archive/refs/tags/0.1.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/std-freestanding-alloc-kal/releases/download/0.1.0/std-freestanding-alloc-kal-0.1.0.tar.gz",
+                },
+                sha256 = "6d3c746e5013655464fd47de54868e06c81a3563046d6bff58c9cb28e689e899",
+            },
+        },
+        windows = {
+            ["0.1.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/std-freestanding-alloc-kal/archive/refs/tags/0.1.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/std-freestanding-alloc-kal/releases/download/0.1.0/std-freestanding-alloc-kal-0.1.0.tar.gz",
+                },
+                sha256 = "6d3c746e5013655464fd47de54868e06c81a3563046d6bff58c9cb28e689e899",
+            },
+        },
+    },
+
+    -- The package's own manifest, inside the tarball's wrap directory.
+    mcpp = "*/mcpp.toml",
+}
diff --git a/pkgs/s/std-freestanding-alloc-libc.lua b/pkgs/s/std-freestanding-alloc-libc.lua
new file mode 100644
index 0000000..aead352
--- /dev/null
+++ b/pkgs/s/std-freestanding-alloc-libc.lua
@@ -0,0 +1,50 @@
+-- std-freestanding-alloc-libc — the sibling of std-freestanding-alloc-kal,
+-- forwarding to the target's C library instead of to openkal.
+--
+-- ⚠️ Exactly one of the two may be in a graph. Both provide the
+-- `freestanding-allocator` capability, and `operator new` is a whole-program
+-- singleton: the resolver reports two providers by name, which is the reason
+-- the choice is made through a capability rather than by whichever definition
+-- the linker happened to see first.
+package = {
+    spec        = "1",
+    namespace   = "mcpplibs",
+    name        = "std-freestanding-alloc-libc",
+    description = "The replaceable allocation functions for the freestanding subset, forwarded to the target's C library",
+    licenses    = {"Apache-2.0"},
+    repo        = "https://github.com/mcpplibs/std-freestanding-alloc-libc",
+    type        = "package",
+
+    xpm = {
+        linux = {
+            ["0.1.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/std-freestanding-alloc-libc/archive/refs/tags/0.1.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/std-freestanding-alloc-libc/releases/download/0.1.0/std-freestanding-alloc-libc-0.1.0.tar.gz",
+                },
+                sha256 = "019d13c2363a0a3487f9e2664ef3f533724edb46deb9badf2ea21298e932505c",
+            },
+        },
+        macosx = {
+            ["0.1.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/std-freestanding-alloc-libc/archive/refs/tags/0.1.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/std-freestanding-alloc-libc/releases/download/0.1.0/std-freestanding-alloc-libc-0.1.0.tar.gz",
+                },
+                sha256 = "019d13c2363a0a3487f9e2664ef3f533724edb46deb9badf2ea21298e932505c",
+            },
+        },
+        windows = {
+            ["0.1.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/std-freestanding-alloc-libc/archive/refs/tags/0.1.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/std-freestanding-alloc-libc/releases/download/0.1.0/std-freestanding-alloc-libc-0.1.0.tar.gz",
+                },
+                sha256 = "019d13c2363a0a3487f9e2664ef3f533724edb46deb9badf2ea21298e932505c",
+            },
+        },
+    },
+
+    -- The package's own manifest, inside the tarball's wrap directory.
+    mcpp = "*/mcpp.toml",
+}
diff --git a/pkgs/s/std-freestanding-nolibc.lua b/pkgs/s/std-freestanding-nolibc.lua
new file mode 100644
index 0000000..c42c214
--- /dev/null
+++ b/pkgs/s/std-freestanding-nolibc.lua
@@ -0,0 +1,53 @@
+-- std-freestanding-nolibc — the five C functions a freestanding C++
+-- translation unit still reaches for, for targets that have declined one.
+--
+-- ⚠️ FOR THE ZERO-LIBC TIER ONLY. mcpp contributes a dependency package's
+-- object files to the consumer's link unconditionally, so a project whose
+-- board package links `-lc` would get two definitions of `memcpy`. The
+-- intended consumer sets `[target.<triple>].sysroot = ""`.
+--
+-- Four of the five are an obligation rather than a convenience: a freestanding
+-- implementation provides memcpy, memmove, memset and memcmp because the
+-- compiler lowers structure assignment and array initialisation onto them.
+package = {
+    spec        = "1",
+    namespace   = "mcpplibs",
+    name        = "std-freestanding-nolibc",
+    description = "memcpy, memmove, memset, memcmp and strlen for targets with no C library",
+    licenses    = {"Apache-2.0"},
+    repo        = "https://github.com/mcpplibs/std-freestanding-nolibc",
+    type        = "package",
+
+    xpm = {
+        linux = {
+            ["0.1.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/std-freestanding-nolibc/archive/refs/tags/0.1.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/std-freestanding-nolibc/releases/download/0.1.0/std-freestanding-nolibc-0.1.0.tar.gz",
+                },
+                sha256 = "280ffe0180e0bd19ef94d4655c564507c4799e5c72ac7624d58722cb8aac363a",
+            },
+        },
+        macosx = {
+            ["0.1.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/std-freestanding-nolibc/archive/refs/tags/0.1.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/std-freestanding-nolibc/releases/download/0.1.0/std-freestanding-nolibc-0.1.0.tar.gz",
+                },
+                sha256 = "280ffe0180e0bd19ef94d4655c564507c4799e5c72ac7624d58722cb8aac363a",
+            },
+        },
+        windows = {
+            ["0.1.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/std-freestanding-nolibc/archive/refs/tags/0.1.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/std-freestanding-nolibc/releases/download/0.1.0/std-freestanding-nolibc-0.1.0.tar.gz",
+                },
+                sha256 = "280ffe0180e0bd19ef94d4655c564507c4799e5c72ac7624d58722cb8aac363a",
+            },
+        },
+    },
+
+    -- The package's own manifest, inside the tarball's wrap directory.
+    mcpp = "*/mcpp.toml",
+}
diff --git a/pkgs/s/std-freestanding.lua b/pkgs/s/std-freestanding.lua
index dc96c0d..5c7adc6 100644
--- a/pkgs/s/std-freestanding.lua
+++ b/pkgs/s/std-freestanding.lua
@@ -30,6 +30,13 @@ package = {
                 },
                 sha256 = "c0026e6aa85d207b3dd00c3f2fe2674174c2e25d86a162f64fe70742420efb00",
             },
+            ["0.3.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/std-freestanding/archive/refs/tags/0.3.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/std-freestanding/releases/download/0.3.0/std-freestanding-0.3.0.tar.gz",
+                },
+                sha256 = "04c02fc42d1fb608a831ff6a1c780a4c12901d8d1d680bd602cb4ff439eedf9a",
+            },
         },
         macosx = {
             ["0.2.0"] = {
@@ -39,6 +46,13 @@ package = {
                 },
                 sha256 = "c0026e6aa85d207b3dd00c3f2fe2674174c2e25d86a162f64fe70742420efb00",
             },
+            ["0.3.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/std-freestanding/archive/refs/tags/0.3.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/std-freestanding/releases/download/0.3.0/std-freestanding-0.3.0.tar.gz",
+                },
+                sha256 = "04c02fc42d1fb608a831ff6a1c780a4c12901d8d1d680bd602cb4ff439eedf9a",
+            },
         },
         windows = {
             ["0.2.0"] = {
@@ -48,6 +62,13 @@ package = {
                 },
                 sha256 = "c0026e6aa85d207b3dd00c3f2fe2674174c2e25d86a162f64fe70742420efb00",
             },
+            ["0.3.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/std-freestanding/archive/refs/tags/0.3.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/std-freestanding/releases/download/0.3.0/std-freestanding-0.3.0.tar.gz",
+                },
+                sha256 = "04c02fc42d1fb608a831ff6a1c780a4c12901d8d1d680bd602cb4ff439eedf9a",
+            },
         },
     },