diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 0b0c314..029ac60 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -20,3 +20,18 @@ jobs:
key: rustup-v1-${{ runner.os }}-${{ hashFiles('mise.toml') }}
- uses: jdx/mise-action@v4
- run: mise run check
+
+ cross-platform:
+ name: cargo test (${{ matrix.os }})
+ runs-on: ${{ matrix.os }}
+ strategy:
+ fail-fast: false
+ matrix:
+ os:
+ - ubuntu-latest
+ - macos-latest
+ - windows-latest
+ steps:
+ - uses: actions/checkout@v6
+ - uses: dtolnay/rust-toolchain@stable
+ - run: cargo test --workspace
diff --git a/Cargo.lock b/Cargo.lock
index 7805f2c..8b549d7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,85 @@
# 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 = "atomic-waker"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
+
+[[package]]
+name = "axum"
+version = "0.8.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "31b698c5f9a010f6573133b09e0de5408834d0c82f8d7475a89fc1867a71cd90"
+dependencies = [
+ "axum-core",
+ "bytes",
+ "form_urlencoded",
+ "futures-util",
+ "http",
+ "http-body",
+ "http-body-util",
+ "hyper",
+ "hyper-util",
+ "itoa",
+ "matchit",
+ "memchr",
+ "mime",
+ "percent-encoding",
+ "pin-project-lite",
+ "serde_core",
+ "serde_json",
+ "serde_path_to_error",
+ "serde_urlencoded",
+ "sync_wrapper",
+ "tokio",
+ "tower",
+ "tower-layer",
+ "tower-service",
+ "tracing",
+]
+
+[[package]]
+name = "axum-core"
+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08c78f31d7b1291f7ee735c1c6780ccde7785daae9a9206026862dab7d8792d1"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "http",
+ "http-body",
+ "http-body-util",
+ "mime",
+ "pin-project-lite",
+ "sync_wrapper",
+ "tower-layer",
+ "tower-service",
+ "tracing",
+]
+
+[[package]]
+name = "bytes"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ae3f5d315924270530207e2a68396c3cc547f6dca3fbdca317cfb1a51edb593"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
+
[[package]]
name = "feder-core"
version = "0.1.0"
@@ -9,6 +88,18 @@ dependencies = [
"feder-vocab",
]
+[[package]]
+name = "feder-runtime-server"
+version = "0.1.0"
+dependencies = [
+ "axum",
+ "feder-core",
+ "feder-vocab",
+ "tokio",
+ "tracing",
+ "tracing-subscriber",
+]
+
[[package]]
name = "feder-vocab"
version = "0.1.0"
@@ -18,6 +109,128 @@ dependencies = [
"serde_json",
]
+[[package]]
+name = "form_urlencoded"
+version = "1.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb4cb245038516f5f85277875cdaa4f7d2c9a0fa0468de06ed190163b1581fcf"
+dependencies = [
+ "percent-encoding",
+]
+
+[[package]]
+name = "futures-channel"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "07bbe89c50d7a535e539b8c17bc0b49bdb77747034daa8087407d655f3f7cc1d"
+dependencies = [
+ "futures-core",
+]
+
+[[package]]
+name = "futures-core"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e3450815272ef58cec6d564423f6e755e25379b217b0bc688e295ba24df6b1d"
+
+[[package]]
+name = "futures-task"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "037711b3d59c33004d3856fbdc83b99d4ff37a24768fa1be9ce3538a1cde4393"
+
+[[package]]
+name = "futures-util"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "389ca41296e6190b48053de0321d02a77f32f8a5d2461dd38762c0593805c6d6"
+dependencies = [
+ "futures-core",
+ "futures-task",
+ "pin-project-lite",
+ "slab",
+]
+
+[[package]]
+name = "http"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6970f50e31d6fc17d3fa27329444bfa74e196cf62e95052a3f6fee181dba6425"
+dependencies = [
+ "bytes",
+ "itoa",
+]
+
+[[package]]
+name = "http-body"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1efedce1fb8e6913f23e0c92de8e62cd5b772a67e7b3946df930a62566c93184"
+dependencies = [
+ "bytes",
+ "http",
+]
+
+[[package]]
+name = "http-body-util"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b021d93e26becf5dc7e1b75b1bed1fd93124b374ceb73f43d4d4eafec896a64a"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "http",
+ "http-body",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "httparse"
+version = "1.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6dbf3de79e51f3d586ab4cb9d5c3e2c14aa28ed23d180cf89b4df0454a69cc87"
+
+[[package]]
+name = "httpdate"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df3b46402a9d5adb4c86a0cf463f42e19994e3ee891101b1841f30a545cb49a9"
+
+[[package]]
+name = "hyper"
+version = "1.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55281c53a1894c864990125767da440a4e630446785086f52523b20033b74498"
+dependencies = [
+ "atomic-waker",
+ "bytes",
+ "futures-channel",
+ "futures-core",
+ "http",
+ "http-body",
+ "httparse",
+ "httpdate",
+ "itoa",
+ "pin-project-lite",
+ "smallvec",
+ "tokio",
+]
+
+[[package]]
+name = "hyper-util"
+version = "0.1.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96547c2556ec9d12fb1578c4eaf448b04993e7fb79cbaad930a656880a6bdfa0"
+dependencies = [
+ "bytes",
+ "http",
+ "http-body",
+ "hyper",
+ "pin-project-lite",
+ "tokio",
+ "tower-service",
+]
+
[[package]]
name = "iri-string"
version = "0.7.12"
@@ -33,12 +246,89 @@ version = "1.0.18"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"
+[[package]]
+name = "lazy_static"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
+
+[[package]]
+name = "libc"
+version = "0.2.186"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68ab91017fe16c622486840e4c83c9a37afeff978bd239b5293d61ece587de66"
+
+[[package]]
+name = "log"
+version = "0.4.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ceec5bc11778974d1bcb055b18002eba7f4b3518b6a0081b3af5f21666da9ad"
+
+[[package]]
+name = "matchers"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d1525a2a28c7f4fa0fc98bb91ae755d1e2d1505079e05539e35bc876b5d65ae9"
+dependencies = [
+ "regex-automata",
+]
+
+[[package]]
+name = "matchit"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47e1ffaa40ddd1f3ed91f717a33c8c0ee23fff369e3aa8772b9605cc1d22f4c3"
+
[[package]]
name = "memchr"
version = "2.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6b947ae49db0d222b1dbc6b113ce7248a3fc3a6ca21b696717bfc000ba4484d8"
+[[package]]
+name = "mime"
+version = "0.3.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
+
+[[package]]
+name = "mio"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02bd0af71c67b473010cbbc60715ee815645a4dc942899111f494b4b737d6fda"
+dependencies = [
+ "libc",
+ "wasi",
+ "windows-sys",
+]
+
+[[package]]
+name = "nu-ansi-term"
+version = "0.50.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5"
+dependencies = [
+ "windows-sys",
+]
+
+[[package]]
+name = "once_cell"
+version = "1.21.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50"
+
+[[package]]
+name = "percent-encoding"
+version = "2.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
+
+[[package]]
+name = "pin-project-lite"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a89322df9ebe1c1578d689c92318e070967d1042b512afbe49518723f4e6d5cd"
+
[[package]]
name = "proc-macro2"
version = "1.0.106"
@@ -57,6 +347,29 @@ dependencies = [
"proc-macro2",
]
+[[package]]
+name = "regex-automata"
+version = "0.4.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e1dd4122fc1595e8162618945476892eefca7b88c52820e74af6262213cae8f"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.8.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d6f6ff9a378485b298a5286656da665ba74413d36db0979633275d2e708145d4"
+
+[[package]]
+name = "ryu"
+version = "1.0.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9774ba4a74de5f7b1c1451ed6cd5285a32eddb5cccb8cc655a4e50009e06477f"
+
[[package]]
name = "serde"
version = "1.0.228"
@@ -100,6 +413,60 @@ dependencies = [
"zmij",
]
+[[package]]
+name = "serde_path_to_error"
+version = "0.1.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10a9ff822e371bb5403e391ecd83e182e0e77ba7f6fe0160b795797109d1b457"
+dependencies = [
+ "itoa",
+ "serde",
+ "serde_core",
+]
+
+[[package]]
+name = "serde_urlencoded"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3491c14715ca2294c4d6a88f15e84739788c1d030eed8c110436aafdaa2f3fd"
+dependencies = [
+ "form_urlencoded",
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "sharded-slab"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f40ca3c46823713e0d4209592e8d6e826aa57e928f09752619fc696c499637f6"
+dependencies = [
+ "lazy_static",
+]
+
+[[package]]
+name = "slab"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c790de23124f9ab44544d7ac05d60440adc586479ce501c1d6d7da3cd8c9cf5"
+
+[[package]]
+name = "smallvec"
+version = "1.15.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ed6a63f02c8539c91a8685a86f4099661ba3da017932f6ebbea6de3f0fa7c90"
+
+[[package]]
+name = "socket2"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52d1cfed4120b4d927bf7c0f86d2087a4a7d6027c906d9f9d525a80573b9be51"
+dependencies = [
+ "libc",
+ "windows-sys",
+]
+
[[package]]
name = "syn"
version = "2.0.117"
@@ -111,12 +478,169 @@ dependencies = [
"unicode-ident",
]
+[[package]]
+name = "sync_wrapper"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0bf256ce5efdfa370213c1dabab5935a12e49f2c58d15e9eac2870d3b4f27263"
+
+[[package]]
+name = "thread_local"
+version = "1.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f60246a4944f24f6e018aa17cdeffb7818b76356965d03b07d6a9886e8962185"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "tokio"
+version = "1.52.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8fc7f01b389ac15039e4dc9531aa973a135d7a4135281b12d7c1bc79fd57fffe"
+dependencies = [
+ "libc",
+ "mio",
+ "pin-project-lite",
+ "socket2",
+ "tokio-macros",
+ "windows-sys",
+]
+
+[[package]]
+name = "tokio-macros"
+version = "2.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "385a6cb71ab9ab790c5fe8d67f1645e6c450a7ce006a33de03daa956cf70a496"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "tower"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebe5ef63511595f1344e2d5cfa636d973292adc0eec1f0ad45fae9f0851ab1d4"
+dependencies = [
+ "futures-core",
+ "futures-util",
+ "pin-project-lite",
+ "sync_wrapper",
+ "tokio",
+ "tower-layer",
+ "tower-service",
+ "tracing",
+]
+
+[[package]]
+name = "tower-layer"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "121c2a6cda46980bb0fcd1647ffaf6cd3fc79a013de288782836f6df9c48780e"
+
+[[package]]
+name = "tower-service"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8df9b6e13f2d32c91b9bd719c00d1958837bc7dec474d94952798cc8e69eeec3"
+
+[[package]]
+name = "tracing"
+version = "0.1.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63e71662fa4b2a2c3a26f570f037eb95bb1f85397f3cd8076caed2f026a6d100"
+dependencies = [
+ "log",
+ "pin-project-lite",
+ "tracing-attributes",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-attributes"
+version = "0.1.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7490cfa5ec963746568740651ac6781f701c9c5ea257c58e057f3ba8cf69e8da"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "tracing-core"
+version = "0.1.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db97caf9d906fbde555dd62fa95ddba9eecfd14cb388e4f491a66d74cd5fb79a"
+dependencies = [
+ "once_cell",
+ "valuable",
+]
+
+[[package]]
+name = "tracing-log"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee855f1f400bd0e5c02d150ae5de3840039a3f54b025156404e34c23c03f47c3"
+dependencies = [
+ "log",
+ "once_cell",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb7f578e5945fb242538965c2d0b04418d38ec25c79d160cd279bf0731c8d319"
+dependencies = [
+ "matchers",
+ "nu-ansi-term",
+ "once_cell",
+ "regex-automata",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
+]
+
[[package]]
name = "unicode-ident"
version = "1.0.24"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
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+version = "0.11.1+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
+
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+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
+
+[[package]]
+name = "windows-sys"
+version = "0.61.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc"
+dependencies = [
+ "windows-link",
+]
+
[[package]]
name = "zmij"
version = "1.0.21"
diff --git a/Cargo.toml b/Cargo.toml
index c56d565..b7439be 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,6 +2,7 @@
members = [
"crates/feder-core",
"crates/feder-vocab",
+ "crates/feder-runtime-server",
]
resolver = "3"
diff --git a/crates/feder-core/src/lib.rs b/crates/feder-core/src/lib.rs
index 8254263..c4c4631 100644
--- a/crates/feder-core/src/lib.rs
+++ b/crates/feder-core/src/lib.rs
@@ -1,3 +1,19 @@
+// Feder: A portable ActivityPub core for many runtimes.
+// Copyright (C) 2026 Feder contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see .
+
//! Portable ActivityPub core logic for Feder.
#![no_std]
diff --git a/crates/feder-runtime-server/Cargo.toml b/crates/feder-runtime-server/Cargo.toml
new file mode 100644
index 0000000..d47ac66
--- /dev/null
+++ b/crates/feder-runtime-server/Cargo.toml
@@ -0,0 +1,16 @@
+[package]
+name = "feder-runtime-server"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+
+[dependencies]
+feder-core = { path = "../feder-core" }
+feder-vocab = { path = "../feder-vocab" }
+axum = "0.8"
+tokio = { version = "1", features = ["macros", "net", "rt-multi-thread"] }
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+
+[lints]
+workspace = true
diff --git a/crates/feder-runtime-server/README.md b/crates/feder-runtime-server/README.md
new file mode 100644
index 0000000..77a93c1
--- /dev/null
+++ b/crates/feder-runtime-server/README.md
@@ -0,0 +1,54 @@
+Feder Runtime Server
+====================
+
+Runnable server runtime for Feder on standard operating systems.
+
+This crate currently starts a local development server with one configured
+actor and a health check endpoint. ActivityPub discovery, inbox handling,
+storage, signing, and delivery are intentionally left to later issues.
+
+
+Run
+---
+
+On Unix shells:
+
+~~~~ sh
+RUST_LOG=info cargo run -p feder-runtime-server
+~~~~
+
+On PowerShell:
+
+~~~~ powershell
+$env:RUST_LOG = "info"; cargo run -p feder-runtime-server
+~~~~
+
+On cmd.exe:
+
+~~~~ bat
+set RUST_LOG=info && cargo run -p feder-runtime-server
+~~~~
+
+The default local actor is:
+
+~~~~ text
+http://127.0.0.1:3000/users/alice
+~~~~
+
+The server listens on:
+
+~~~~ text
+127.0.0.1:3000
+~~~~
+
+Check the process:
+
+~~~~ sh
+curl -i http://127.0.0.1:3000/healthz
+~~~~
+
+Expected response:
+
+~~~~ text
+HTTP/1.1 204 No Content
+~~~~
diff --git a/crates/feder-runtime-server/src/app.rs b/crates/feder-runtime-server/src/app.rs
new file mode 100644
index 0000000..0480a75
--- /dev/null
+++ b/crates/feder-runtime-server/src/app.rs
@@ -0,0 +1,55 @@
+// Feder: A portable ActivityPub core for many runtimes.
+// Copyright (C) 2026 Feder contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see .
+
+use std::sync::{Arc, Mutex};
+
+use crate::config::RuntimeConfig;
+use axum::{Router, http::StatusCode, routing::get};
+use feder_core::{FederConfig, FederCore};
+use feder_vocab::Actor;
+
+#[derive(Clone)]
+pub struct AppState {
+ pub core: Arc>,
+}
+
+impl AppState {
+ pub fn from_config(config: &RuntimeConfig) -> Self {
+ let actor = Actor::person(
+ config.actor_id.clone(),
+ config.inbox.clone(),
+ config.outbox.clone(),
+ );
+
+ let core = FederCore::new(FederConfig::new(actor));
+
+ Self {
+ core: Arc::new(Mutex::new(core)),
+ }
+ }
+}
+
+pub fn build_router(config: &RuntimeConfig) -> Router {
+ let state = AppState::from_config(config);
+
+ Router::new()
+ .route("/healthz", get(healthz))
+ .with_state(state)
+}
+
+async fn healthz() -> StatusCode {
+ StatusCode::NO_CONTENT
+}
diff --git a/crates/feder-runtime-server/src/config.rs b/crates/feder-runtime-server/src/config.rs
new file mode 100644
index 0000000..838d714
--- /dev/null
+++ b/crates/feder-runtime-server/src/config.rs
@@ -0,0 +1,45 @@
+// Feder: A portable ActivityPub core for many runtimes.
+// Copyright (C) 2026 Feder contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see .
+
+use std::net::SocketAddr;
+
+use feder_vocab::Iri;
+
+pub struct RuntimeConfig {
+ pub bind: SocketAddr,
+ pub actor_id: Iri,
+ pub inbox: Iri,
+ pub outbox: Iri,
+}
+
+impl RuntimeConfig {
+ pub fn default_local() -> Self {
+ Self {
+ actor_id: "http://127.0.0.1:3000/users/alice"
+ .parse()
+ .expect("valid default actor IRI"),
+ inbox: "http://127.0.0.1:3000/users/alice/inbox"
+ .parse()
+ .expect("valid default inbox IRI"),
+ outbox: "http://127.0.0.1:3000/users/alice/outbox"
+ .parse()
+ .expect("valid default outbox IRI"),
+ bind: "127.0.0.1:3000"
+ .parse()
+ .expect("valid default bind address"),
+ }
+ }
+}
diff --git a/crates/feder-runtime-server/src/error.rs b/crates/feder-runtime-server/src/error.rs
new file mode 100644
index 0000000..30ba25c
--- /dev/null
+++ b/crates/feder-runtime-server/src/error.rs
@@ -0,0 +1,17 @@
+// Feder: A portable ActivityPub core for many runtimes.
+// Copyright (C) 2026 Feder contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see .
+
+pub type Error = Box;
diff --git a/crates/feder-runtime-server/src/lib.rs b/crates/feder-runtime-server/src/lib.rs
new file mode 100644
index 0000000..193ab15
--- /dev/null
+++ b/crates/feder-runtime-server/src/lib.rs
@@ -0,0 +1,19 @@
+// Feder: A portable ActivityPub core for many runtimes.
+// Copyright (C) 2026 Feder contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see .
+
+pub mod app;
+pub mod config;
+pub mod error;
diff --git a/crates/feder-runtime-server/src/main.rs b/crates/feder-runtime-server/src/main.rs
new file mode 100644
index 0000000..92dfcee
--- /dev/null
+++ b/crates/feder-runtime-server/src/main.rs
@@ -0,0 +1,34 @@
+// Feder: A portable ActivityPub core for many runtimes.
+// Copyright (C) 2026 Feder contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see .
+
+use feder_runtime_server::{app::build_router, config::RuntimeConfig, error::Error};
+
+#[tokio::main]
+async fn main() -> Result<(), Error> {
+ tracing_subscriber::fmt()
+ .with_env_filter(tracing_subscriber::EnvFilter::from_default_env())
+ .init();
+
+ let config = RuntimeConfig::default_local();
+ let app = build_router(&config);
+
+ tracing::info!(bind = %&config.bind, actor = %&config.actor_id, "starting Feder runtime");
+
+ let listener = tokio::net::TcpListener::bind(config.bind).await?;
+ axum::serve(listener, app).await?;
+
+ Ok(())
+}
diff --git a/crates/feder-vocab/src/lib.rs b/crates/feder-vocab/src/lib.rs
index f806167..ab1a5b6 100644
--- a/crates/feder-vocab/src/lib.rs
+++ b/crates/feder-vocab/src/lib.rs
@@ -1,3 +1,19 @@
+// Feder: A portable ActivityPub core for many runtimes.
+// Copyright (C) 2026 Feder contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see .
+
//! Minimal Activity Vocabulary types for Feder.
#![no_std]
//!
diff --git a/crates/feder-vocab/tests/phase1_shapes.rs b/crates/feder-vocab/tests/phase1_shapes.rs
index 371e682..2526841 100644
--- a/crates/feder-vocab/tests/phase1_shapes.rs
+++ b/crates/feder-vocab/tests/phase1_shapes.rs
@@ -1,3 +1,19 @@
+// Feder: A portable ActivityPub core for many runtimes.
+// Copyright (C) 2026 Feder contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see .
+
use feder_vocab::{
ACTIVITYSTREAMS_CONTEXT, Accept, Create, Follow, Iri, Note, Reference, References,
};