From fec44de5d4746824d9275e7dbe1bff3b3de12ac3 Mon Sep 17 00:00:00 2001
From: Christian <christianpavilonis@outlook.com>
Date: Wed, 18 Feb 2026 11:05:54 -0600
Subject: [PATCH 1/7] Support for spin framework

---
 crates/mocktioneer-adapter-spin/Cargo.toml | 23 +++++++++
 crates/mocktioneer-adapter-spin/spin.toml  | 16 ++++++
 crates/mocktioneer-adapter-spin/src/lib.rs | 12 +++++
 edgezero.toml                              | 57 ++++++++++++++--------
 4 files changed, 88 insertions(+), 20 deletions(-)
 create mode 100644 crates/mocktioneer-adapter-spin/Cargo.toml
 create mode 100644 crates/mocktioneer-adapter-spin/spin.toml
 create mode 100644 crates/mocktioneer-adapter-spin/src/lib.rs

diff --git a/crates/mocktioneer-adapter-spin/Cargo.toml b/crates/mocktioneer-adapter-spin/Cargo.toml
new file mode 100644
index 0000000..6b1ae6d
--- /dev/null
+++ b/crates/mocktioneer-adapter-spin/Cargo.toml
@@ -0,0 +1,23 @@
+[package]
+name = "mocktioneer-adapter-spin"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[lib]
+crate-type = ["cdylib"]
+path = "src/lib.rs"
+
+[features]
+default = ["spin"]
+spin = ["edgezero-adapter-spin/spin"]
+
+[dependencies]
+mocktioneer-core = { workspace = true }
+edgezero-adapter-spin = { workspace = true }
+anyhow = { workspace = true }
+
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+edgezero-adapter-spin = { workspace = true, features = ["spin"] }
+edgezero-core = { workspace = true }
+spin-sdk = { workspace = true }
diff --git a/crates/mocktioneer-adapter-spin/spin.toml b/crates/mocktioneer-adapter-spin/spin.toml
new file mode 100644
index 0000000..cba7826
--- /dev/null
+++ b/crates/mocktioneer-adapter-spin/spin.toml
@@ -0,0 +1,16 @@
+spin_manifest_version = 2
+
+[application]
+name = "mocktioneer-adapter-spin"
+version = "0.1.0"
+
+[[trigger.http]]
+route = "/..."
+component = "mocktioneer"
+
+[component.mocktioneer]
+source = "../../target/wasm32-wasip1/release/mocktioneer_adapter_spin.wasm"
+allowed_outbound_hosts = ["https://*:*"]
+[component.mocktioneer.build]
+command = "cargo build --target wasm32-wasip1 --release"
+watch = ["src/**/*.rs", "Cargo.toml"]
diff --git a/crates/mocktioneer-adapter-spin/src/lib.rs b/crates/mocktioneer-adapter-spin/src/lib.rs
new file mode 100644
index 0000000..604b2c0
--- /dev/null
+++ b/crates/mocktioneer-adapter-spin/src/lib.rs
@@ -0,0 +1,12 @@
+#[cfg(target_arch = "wasm32")]
+use mocktioneer_core::MocktioneerApp;
+#[cfg(target_arch = "wasm32")]
+use spin_sdk::http::{IncomingRequest, IntoResponse};
+#[cfg(target_arch = "wasm32")]
+use spin_sdk::http_component;
+
+#[cfg(target_arch = "wasm32")]
+#[http_component]
+async fn handle(req: IncomingRequest) -> anyhow::Result<impl IntoResponse> {
+    edgezero_adapter_spin::run_app::<MocktioneerApp>(req).await
+}
diff --git a/edgezero.toml b/edgezero.toml
index e8f7e8c..81d1f25 100644
--- a/edgezero.toml
+++ b/edgezero.toml
@@ -11,140 +11,140 @@ id = "root"
 path = "/"
 methods = ["GET"]
 handler = "mocktioneer_core::routes::handle_root"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "root_options"
 path = "/"
 methods = ["OPTIONS"]
 handler = "mocktioneer_core::routes::handle_options"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "openrtb_auction"
 path = "/openrtb2/auction"
 methods = ["POST"]
 handler = "mocktioneer_core::routes::handle_openrtb_auction"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "openrtb_options"
 path = "/openrtb2/auction"
 methods = ["OPTIONS"]
 handler = "mocktioneer_core::routes::handle_options"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "static_img"
 path = "/static/img/{size}"
 methods = ["GET"]
 handler = "mocktioneer_core::routes::handle_static_img"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "static_img_options"
 path = "/static/img/{size}"
 methods = ["OPTIONS"]
 handler = "mocktioneer_core::routes::handle_options"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "static_creatives"
 path = "/static/creatives/{size}"
 methods = ["GET"]
 handler = "mocktioneer_core::routes::handle_static_creatives"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "static_creatives_options"
 path = "/static/creatives/{size}"
 methods = ["OPTIONS"]
 handler = "mocktioneer_core::routes::handle_options"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "click"
 path = "/click"
 methods = ["GET"]
 handler = "mocktioneer_core::routes::handle_click"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "click_options"
 path = "/click"
 methods = ["OPTIONS"]
 handler = "mocktioneer_core::routes::handle_options"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "pixel"
 path = "/pixel"
 methods = ["GET"]
 handler = "mocktioneer_core::routes::handle_pixel"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "pixel_options"
 path = "/pixel"
 methods = ["OPTIONS"]
 handler = "mocktioneer_core::routes::handle_options"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "aps_bid"
 path = "/e/dtb/bid"
 methods = ["POST"]
 handler = "mocktioneer_core::routes::handle_aps_bid"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "aps_bid_options"
 path = "/e/dtb/bid"
 methods = ["OPTIONS"]
 handler = "mocktioneer_core::routes::handle_options"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "aps_win"
 path = "/aps/win"
 methods = ["GET"]
 handler = "mocktioneer_core::routes::handle_aps_win"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "aps_win_options"
 path = "/aps/win"
 methods = ["OPTIONS"]
 handler = "mocktioneer_core::routes::handle_options"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "adserver_mediate"
 path = "/adserver/mediate"
 methods = ["POST"]
 handler = "mocktioneer_core::routes::handle_adserver_mediate"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "adserver_mediate_options"
 path = "/adserver/mediate"
 methods = ["OPTIONS"]
 handler = "mocktioneer_core::routes::handle_options"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "sizes"
 path = "/_/sizes"
 methods = ["GET"]
 handler = "mocktioneer_core::routes::handle_sizes"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 [[triggers.http]]
 id = "sizes_options"
 path = "/_/sizes"
 methods = ["OPTIONS"]
 handler = "mocktioneer_core::routes::handle_options"
-adapters = ["axum", "cloudflare", "fastly"]
+adapters = ["axum", "cloudflare", "fastly", "spin"]
 
 # Edge Cookie (EC) sync endpoints
 
@@ -243,3 +243,20 @@ serve = "fastly compute serve -C crates/mocktioneer-adapter-fastly"
 endpoint = "mocktioneerlog"
 level = "info"
 echo_stdout = false
+
+[adapters.spin.adapter]
+crate = "crates/mocktioneer-adapter-spin"
+manifest = "crates/mocktioneer-adapter-spin/spin.toml"
+
+[adapters.spin.build]
+target = "wasm32-wasip1"
+profile = "release"
+features = ["spin"]
+
+[adapters.spin.commands]
+build = "cargo build --release --target wasm32-wasip1 -p mocktioneer-adapter-spin"
+serve = "spin up --from crates/mocktioneer-adapter-spin"
+deploy = "spin deploy --from crates/mocktioneer-adapter-spin"
+
+[adapters.spin.logging]
+level = "info"

From b4a55be93be4fd8e57bd5dc684a0da36c8e5cd46 Mon Sep 17 00:00:00 2001
From: Christian <christianpavilonis@outlook.com>
Date: Wed, 18 Feb 2026 11:06:17 -0600
Subject: [PATCH 2/7] Ignore .spin/logs directories

---
 .gitignore | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.gitignore b/.gitignore
index a147ad9..380c166 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,10 @@
 **/bin/
 **/pkg/
 
+# Spin runtime logs
+.spin/logs/
+**/.spin/logs/
+
 # env
 .env
 

From 1f36eaabe7dba898e1a8cde4b2e1704c0ae4b595 Mon Sep 17 00:00:00 2001
From: Christian <christianpavilonis@outlook.com>
Date: Wed, 1 Apr 2026 19:06:57 -0500
Subject: [PATCH 3/7] Address PR review feedback

- Add mocktioneer-adapter-spin to workspace members
- Add edgezero-adapter-spin and spin-sdk to workspace dependencies
- Add license.workspace = true to adapter Cargo.toml
- Fix duplicate edgezero-adapter-spin dependency, set default = []
- Add module doc and cfg_attr for non-WASM host compilation
- Update to Spin 3: manifest v3, wasm32-wasip2 target, spin-sdk 5.2
- Add -p flag to spin.toml and edgezero.toml build commands
- Update CI feature check to include spin
---
 .github/workflows/test.yml                 |   2 +-
 Cargo.lock                                 | 132 ++++++++++++++++++++-
 Cargo.toml                                 |   5 +
 crates/mocktioneer-adapter-spin/Cargo.toml |   5 +-
 crates/mocktioneer-adapter-spin/spin.toml  |   6 +-
 crates/mocktioneer-adapter-spin/src/lib.rs |   9 ++
 edgezero.toml                              |   4 +-
 7 files changed, 153 insertions(+), 10 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3759cc3..8d8031c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -56,7 +56,7 @@ jobs:
         run: cargo test --workspace --all-targets
 
       - name: Check feature compilation
-        run: cargo check --workspace --all-targets --features "fastly cloudflare"
+        run: cargo check --workspace --all-targets --features "fastly cloudflare spin"
 
   playwright:
     name: playwright tests
diff --git a/Cargo.lock b/Cargo.lock
index 1350f22..89f19d9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -633,6 +633,23 @@ dependencies = [
  "log-fastly",
 ]
 
+[[package]]
+name = "edgezero-adapter-spin"
+version = "0.1.0"
+source = "git+https://github.com/stackpop/edgezero.git?branch=main#ce6bcf74b529d9066d08ba87b2971af8379eb29e"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "brotli",
+ "bytes",
+ "edgezero-core",
+ "flate2",
+ "futures",
+ "futures-util",
+ "log",
+ "spin-sdk",
+]
+
 [[package]]
 name = "edgezero-core"
 version = "0.1.0"
@@ -934,7 +951,7 @@ dependencies = [
  "cfg-if",
  "js-sys",
  "libc",
- "wasi",
+ "wasi 0.11.1+wasi-snapshot-preview1",
  "wasm-bindgen",
 ]
 
@@ -1430,7 +1447,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a69bcab0ad47271a0234d9422b131806bf3968021e5dc9328caf2d4cd58557fc"
 dependencies = [
  "libc",
- "wasi",
+ "wasi 0.11.1+wasi-snapshot-preview1",
  "windows-sys 0.61.2",
 ]
 
@@ -1470,6 +1487,17 @@ dependencies = [
  "mocktioneer-core",
 ]
 
+[[package]]
+name = "mocktioneer-adapter-spin"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "edgezero-adapter-spin",
+ "edgezero-core",
+ "mocktioneer-core",
+ "spin-sdk",
+]
+
 [[package]]
 name = "mocktioneer-core"
 version = "0.1.0"
@@ -1903,6 +1931,16 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "routefinder"
+version = "0.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0971d3c8943a6267d6bd0d782fdc4afa7593e7381a92a3df950ff58897e066b5"
+dependencies = [
+ "smartcow",
+ "smartstring",
+]
+
 [[package]]
 name = "rustc-hash"
 version = "2.1.1"
@@ -2228,6 +2266,26 @@ version = "1.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "67b1b7a3b5fe4f1376887184045fcf45c69e92af734b7aaddc05fb777b6fbd03"
 
+[[package]]
+name = "smartcow"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "656fcb1c1fca8c4655372134ce87d8afdf5ec5949ebabe8d314be0141d8b5da2"
+dependencies = [
+ "smartstring",
+]
+
+[[package]]
+name = "smartstring"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fb72c633efbaa2dd666986505016c32c3044395ceaf881518399d2f4127ee29"
+dependencies = [
+ "autocfg",
+ "static_assertions",
+ "version_check",
+]
+
 [[package]]
 name = "socket2"
 version = "0.6.2"
@@ -2238,6 +2296,52 @@ dependencies = [
  "windows-sys 0.60.2",
 ]
 
+[[package]]
+name = "spin-executor"
+version = "5.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bba409d00af758cd5de128da4a801e891af0545138f66a688f025f6d4e33870b"
+dependencies = [
+ "futures",
+ "once_cell",
+ "wasi 0.13.1+wasi-0.2.0",
+]
+
+[[package]]
+name = "spin-macro"
+version = "5.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f959f16928e3c023468e41da9ebb77442e2ce22315e8dab11508fe76b3567ee1"
+dependencies = [
+ "anyhow",
+ "bytes",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "spin-sdk"
+version = "5.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8951c7c4ab7f87f332d497789eeed9631c8116988b628b4851eb2fa999ead019"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "bytes",
+ "chrono",
+ "form_urlencoded",
+ "futures",
+ "http",
+ "once_cell",
+ "routefinder",
+ "spin-executor",
+ "spin-macro",
+ "thiserror 2.0.18",
+ "wasi 0.13.1+wasi-0.2.0",
+ "wit-bindgen",
+]
+
 [[package]]
 name = "spki"
 version = "0.7.3"
@@ -2254,6 +2358,12 @@ version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ce2be8dc25455e1f91df71bfa12ad37d7af1092ae736f3a6cd0e37bc7810596"
 
+[[package]]
+name = "static_assertions"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
+
 [[package]]
 name = "strsim"
 version = "0.11.1"
@@ -2707,6 +2817,15 @@ version = "0.11.1+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
 
+[[package]]
+name = "wasi"
+version = "0.13.1+wasi-0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f43d1c36145feb89a3e61aa0ba3e582d976a8ab77f1474aa0adb80800fe0cf8"
+dependencies = [
+ "wit-bindgen-rt",
+]
+
 [[package]]
 name = "wasip2"
 version = "1.0.2+wasi-0.2.9"
@@ -3173,6 +3292,15 @@ dependencies = [
  "wit-parser",
 ]
 
+[[package]]
+name = "wit-bindgen-rt"
+version = "0.24.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b0780cf7046630ed70f689a098cd8d56c5c3b22f2a7379bbdb088879963ff96"
+dependencies = [
+ "bitflags 2.10.0",
+]
+
 [[package]]
 name = "wit-bindgen-rust"
 version = "0.51.0"
diff --git a/Cargo.toml b/Cargo.toml
index dc47c31..d770b06 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,6 +4,7 @@ members = [
   "crates/mocktioneer-adapter-axum",
   "crates/mocktioneer-adapter-cloudflare",
   "crates/mocktioneer-adapter-fastly",
+  "crates/mocktioneer-adapter-spin",
 ]
 resolver = "2"
 
@@ -24,9 +25,13 @@ ed25519-dalek = "2.1"
 edgezero-adapter-axum = { git = "https://github.com/stackpop/edgezero.git", branch = "main", package = "edgezero-adapter-axum", default-features = false }
 edgezero-adapter-cloudflare = { git = "https://github.com/stackpop/edgezero.git", branch = "main", package = "edgezero-adapter-cloudflare", default-features = false }
 edgezero-adapter-fastly = { git = "https://github.com/stackpop/edgezero.git", branch = "main", package = "edgezero-adapter-fastly", default-features = false }
+edgezero-adapter-spin = { git = "https://github.com/stackpop/edgezero.git", branch = "main", package = "edgezero-adapter-spin", default-features = false }
 edgezero-cli = { git = "https://github.com/stackpop/edgezero.git", branch = "main", package = "edgezero-cli" }
 edgezero-core = { git = "https://github.com/stackpop/edgezero.git", branch = "main", package = "edgezero-core" }
 fastly = "0.12.1"
+# Keep the Spin SDK surface minimal; the adapter only uses `#[http_component]`
+# and HTTP request/response types.
+spin-sdk = { version = "5.2", default-features = false }
 futures = { version = "0.3", features = ["std", "executor"] }
 futures-util = "0.3.32"
 handlebars = "6"
diff --git a/crates/mocktioneer-adapter-spin/Cargo.toml b/crates/mocktioneer-adapter-spin/Cargo.toml
index 6b1ae6d..2e155e8 100644
--- a/crates/mocktioneer-adapter-spin/Cargo.toml
+++ b/crates/mocktioneer-adapter-spin/Cargo.toml
@@ -3,18 +3,19 @@ name = "mocktioneer-adapter-spin"
 version = "0.1.0"
 edition = "2021"
 publish = false
+license.workspace = true
 
 [lib]
 crate-type = ["cdylib"]
 path = "src/lib.rs"
 
 [features]
-default = ["spin"]
+default = []
 spin = ["edgezero-adapter-spin/spin"]
 
 [dependencies]
-mocktioneer-core = { workspace = true }
 edgezero-adapter-spin = { workspace = true }
+mocktioneer-core = { workspace = true }
 anyhow = { workspace = true }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
diff --git a/crates/mocktioneer-adapter-spin/spin.toml b/crates/mocktioneer-adapter-spin/spin.toml
index cba7826..bebe77e 100644
--- a/crates/mocktioneer-adapter-spin/spin.toml
+++ b/crates/mocktioneer-adapter-spin/spin.toml
@@ -1,4 +1,4 @@
-spin_manifest_version = 2
+spin_manifest_version = 3
 
 [application]
 name = "mocktioneer-adapter-spin"
@@ -9,8 +9,8 @@ route = "/..."
 component = "mocktioneer"
 
 [component.mocktioneer]
-source = "../../target/wasm32-wasip1/release/mocktioneer_adapter_spin.wasm"
+source = "../../target/wasm32-wasip2/release/mocktioneer_adapter_spin.wasm"
 allowed_outbound_hosts = ["https://*:*"]
 [component.mocktioneer.build]
-command = "cargo build --target wasm32-wasip1 --release"
+command = "cargo build --target wasm32-wasip2 --release -p mocktioneer-adapter-spin"
 watch = ["src/**/*.rs", "Cargo.toml"]
diff --git a/crates/mocktioneer-adapter-spin/src/lib.rs b/crates/mocktioneer-adapter-spin/src/lib.rs
index 604b2c0..72eddc7 100644
--- a/crates/mocktioneer-adapter-spin/src/lib.rs
+++ b/crates/mocktioneer-adapter-spin/src/lib.rs
@@ -1,3 +1,12 @@
+//! Spin adapter for Mocktioneer.
+//!
+//! This crate is a `cdylib` targeting `wasm32-wasip2`. All runtime code is
+//! gated behind `#[cfg(target_arch = "wasm32")]` so the crate compiles (but is
+//! empty) on the host target, allowing `cargo fmt`, `cargo clippy`, and
+//! `cargo test` to run across the whole workspace without pulling in WASM-only
+//! dependencies.
+#![cfg_attr(not(target_arch = "wasm32"), allow(dead_code, unused_imports))]
+
 #[cfg(target_arch = "wasm32")]
 use mocktioneer_core::MocktioneerApp;
 #[cfg(target_arch = "wasm32")]
diff --git a/edgezero.toml b/edgezero.toml
index 81d1f25..2e49014 100644
--- a/edgezero.toml
+++ b/edgezero.toml
@@ -249,12 +249,12 @@ crate = "crates/mocktioneer-adapter-spin"
 manifest = "crates/mocktioneer-adapter-spin/spin.toml"
 
 [adapters.spin.build]
-target = "wasm32-wasip1"
+target = "wasm32-wasip2"
 profile = "release"
 features = ["spin"]
 
 [adapters.spin.commands]
-build = "cargo build --release --target wasm32-wasip1 -p mocktioneer-adapter-spin"
+build = "cargo build --release --target wasm32-wasip2 -p mocktioneer-adapter-spin"
 serve = "spin up --from crates/mocktioneer-adapter-spin"
 deploy = "spin deploy --from crates/mocktioneer-adapter-spin"
 

From ced16ee1a974d67ae28188a7c13e50d02023a4bb Mon Sep 17 00:00:00 2001
From: Christian <christianpavilonis@outlook.com>
Date: Thu, 16 Apr 2026 17:05:37 -0500
Subject: [PATCH 4/7] Address final PR review feedback

- Move edgezero-core to base [dependencies] with feature-unification comment
- Tighten allowed_outbound_hosts to [] in spin.toml
- Add echo_stdout = true to spin logging config in edgezero.toml
- Update CI gate docs to include spin feature in cargo check command
---
 CLAUDE.md                                  | 2 +-
 crates/mocktioneer-adapter-spin/Cargo.toml | 2 +-
 crates/mocktioneer-adapter-spin/spin.toml  | 2 +-
 edgezero.toml                              | 1 +
 4 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/CLAUDE.md b/CLAUDE.md
index 7073360..26cac29 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -161,7 +161,7 @@ Every PR must pass:
 1. `cargo fmt --all -- --check`
 2. `cargo clippy --workspace --all-targets --all-features -- -D warnings`
 3. `cargo test --workspace --all-targets`
-4. `cargo check --workspace --all-targets --features "fastly cloudflare"`
+4. `cargo check --workspace --all-targets --features "fastly cloudflare spin"`
 5. Playwright e2e tests (`tests/playwright/`)
 6. ESLint + Prettier on `docs/`
 
diff --git a/crates/mocktioneer-adapter-spin/Cargo.toml b/crates/mocktioneer-adapter-spin/Cargo.toml
index 2e155e8..1dee257 100644
--- a/crates/mocktioneer-adapter-spin/Cargo.toml
+++ b/crates/mocktioneer-adapter-spin/Cargo.toml
@@ -15,10 +15,10 @@ spin = ["edgezero-adapter-spin/spin"]
 
 [dependencies]
 edgezero-adapter-spin = { workspace = true }
+edgezero-core = { workspace = true } # direct dep for Cargo feature unification; same pattern as cloudflare/fastly adapters
 mocktioneer-core = { workspace = true }
 anyhow = { workspace = true }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 edgezero-adapter-spin = { workspace = true, features = ["spin"] }
-edgezero-core = { workspace = true }
 spin-sdk = { workspace = true }
diff --git a/crates/mocktioneer-adapter-spin/spin.toml b/crates/mocktioneer-adapter-spin/spin.toml
index bebe77e..9e16a32 100644
--- a/crates/mocktioneer-adapter-spin/spin.toml
+++ b/crates/mocktioneer-adapter-spin/spin.toml
@@ -10,7 +10,7 @@ component = "mocktioneer"
 
 [component.mocktioneer]
 source = "../../target/wasm32-wasip2/release/mocktioneer_adapter_spin.wasm"
-allowed_outbound_hosts = ["https://*:*"]
+allowed_outbound_hosts = []
 [component.mocktioneer.build]
 command = "cargo build --target wasm32-wasip2 --release -p mocktioneer-adapter-spin"
 watch = ["src/**/*.rs", "Cargo.toml"]
diff --git a/edgezero.toml b/edgezero.toml
index 2e49014..08fced7 100644
--- a/edgezero.toml
+++ b/edgezero.toml
@@ -260,3 +260,4 @@ deploy = "spin deploy --from crates/mocktioneer-adapter-spin"
 
 [adapters.spin.logging]
 level = "info"
+echo_stdout = true

From 2124608d40d3d383ddd624368ed874c4334ca1e4 Mon Sep 17 00:00:00 2001
From: Christian <christianpavilonis@outlook.com>
Date: Thu, 23 Apr 2026 11:41:06 -0500
Subject: [PATCH 5/7] Tighten Spin adapter review follow-ups

---
 CLAUDE.md                                  | 21 ++++++++++++---------
 crates/mocktioneer-adapter-spin/Cargo.toml |  4 ++--
 crates/mocktioneer-adapter-spin/spin.toml  |  2 +-
 crates/mocktioneer-adapter-spin/src/lib.rs |  2 +-
 edgezero.toml                              |  2 +-
 5 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/CLAUDE.md b/CLAUDE.md
index 26cac29..e867689 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -5,10 +5,10 @@
 Mocktioneer is a deterministic OpenRTB banner bidder for edge platforms. It lets
 you test client integrations (Prebid.js, Prebid Server, custom SDKs) without
 depending on third-party bidders or origin backends. Write once, deploy to
-Fastly Compute, Cloudflare Workers, or native Axum servers. The codebase is a
-Cargo workspace with 4 crates under `crates/`, a VitePress documentation site
-under `docs/`, Playwright e2e tests under `tests/playwright/`, and CI workflows
-under `.github/workflows/`.
+Fastly Compute, Cloudflare Workers, Fermyon Spin, or native Axum servers. The
+codebase is a Cargo workspace with 5 crates under `crates/`, a VitePress
+documentation site under `docs/`, Playwright e2e tests under
+`tests/playwright/`, and CI workflows under `.github/workflows/`.
 
 ## Workspace Layout
 
@@ -18,6 +18,7 @@ crates/
   mocktioneer-adapter-axum/       # Native Axum HTTP server
   mocktioneer-adapter-cloudflare/ # Cloudflare Workers bridge (wasm32-unknown-unknown)
   mocktioneer-adapter-fastly/     # Fastly Compute bridge (wasm32-wasip1)
+  mocktioneer-adapter-spin/       # Fermyon Spin bridge (wasm32-wasip2)
 docs/                             # VitePress documentation site (Node.js)
 examples/                         # curl/shell scripts for endpoint demos
 tests/playwright/                 # Playwright e2e tests (creative visibility, sizes)
@@ -64,11 +65,12 @@ faster iteration since nearly all business logic lives there.
 
 ## Compilation Targets
 
-| Adapter    | Target                   | Notes                              |
-| ---------- | ------------------------ | ---------------------------------- |
-| Fastly     | `wasm32-wasip1`          | Requires Viceroy for local testing |
-| Cloudflare | `wasm32-unknown-unknown` | Requires `wrangler` for dev/deploy |
-| Axum       | Native (host triple)     | Standard Tokio runtime             |
+| Adapter    | Target                   | Notes                                 |
+| ---------- | ------------------------ | ------------------------------------- |
+| Fastly     | `wasm32-wasip1`          | Requires Viceroy for local testing    |
+| Cloudflare | `wasm32-unknown-unknown` | Requires `wrangler` for dev/deploy    |
+| Spin       | `wasm32-wasip2`          | Requires `spin` CLI for local/deploy  |
+| Axum       | Native (host triple)     | Standard Tokio runtime                |
 
 ## Coding Conventions
 
@@ -290,6 +292,7 @@ Custom commands live in `.claude/commands/`:
 | Axum adapter entry | `crates/mocktioneer-adapter-axum/src/main.rs`      |
 | Cloudflare adapter | `crates/mocktioneer-adapter-cloudflare/src/lib.rs` |
 | Fastly adapter     | `crates/mocktioneer-adapter-fastly/src/main.rs`    |
+| Spin adapter       | `crates/mocktioneer-adapter-spin/src/lib.rs`       |
 | Playwright tests   | `tests/playwright/`                                |
 | Example scripts    | `examples/`                                        |
 | CI tests           | `.github/workflows/test.yml`                       |
diff --git a/crates/mocktioneer-adapter-spin/Cargo.toml b/crates/mocktioneer-adapter-spin/Cargo.toml
index 1dee257..991a803 100644
--- a/crates/mocktioneer-adapter-spin/Cargo.toml
+++ b/crates/mocktioneer-adapter-spin/Cargo.toml
@@ -15,10 +15,10 @@ spin = ["edgezero-adapter-spin/spin"]
 
 [dependencies]
 edgezero-adapter-spin = { workspace = true }
-edgezero-core = { workspace = true } # direct dep for Cargo feature unification; same pattern as cloudflare/fastly adapters
+edgezero-core = { workspace = true }
 mocktioneer-core = { workspace = true }
-anyhow = { workspace = true }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
+anyhow = { workspace = true }
 edgezero-adapter-spin = { workspace = true, features = ["spin"] }
 spin-sdk = { workspace = true }
diff --git a/crates/mocktioneer-adapter-spin/spin.toml b/crates/mocktioneer-adapter-spin/spin.toml
index 9e16a32..e731d36 100644
--- a/crates/mocktioneer-adapter-spin/spin.toml
+++ b/crates/mocktioneer-adapter-spin/spin.toml
@@ -12,5 +12,5 @@ component = "mocktioneer"
 source = "../../target/wasm32-wasip2/release/mocktioneer_adapter_spin.wasm"
 allowed_outbound_hosts = []
 [component.mocktioneer.build]
-command = "cargo build --target wasm32-wasip2 --release -p mocktioneer-adapter-spin"
+command = "cargo build --release --target wasm32-wasip2 -p mocktioneer-adapter-spin"
 watch = ["src/**/*.rs", "Cargo.toml"]
diff --git a/crates/mocktioneer-adapter-spin/src/lib.rs b/crates/mocktioneer-adapter-spin/src/lib.rs
index 72eddc7..bd71e31 100644
--- a/crates/mocktioneer-adapter-spin/src/lib.rs
+++ b/crates/mocktioneer-adapter-spin/src/lib.rs
@@ -5,7 +5,7 @@
 //! empty) on the host target, allowing `cargo fmt`, `cargo clippy`, and
 //! `cargo test` to run across the whole workspace without pulling in WASM-only
 //! dependencies.
-#![cfg_attr(not(target_arch = "wasm32"), allow(dead_code, unused_imports))]
+#![cfg_attr(not(target_arch = "wasm32"), allow(dead_code))]
 
 #[cfg(target_arch = "wasm32")]
 use mocktioneer_core::MocktioneerApp;
diff --git a/edgezero.toml b/edgezero.toml
index 08fced7..944fa50 100644
--- a/edgezero.toml
+++ b/edgezero.toml
@@ -255,8 +255,8 @@ features = ["spin"]
 
 [adapters.spin.commands]
 build = "cargo build --release --target wasm32-wasip2 -p mocktioneer-adapter-spin"
-serve = "spin up --from crates/mocktioneer-adapter-spin"
 deploy = "spin deploy --from crates/mocktioneer-adapter-spin"
+serve = "spin up --from crates/mocktioneer-adapter-spin"
 
 [adapters.spin.logging]
 level = "info"

From d48c69019951ccf3ff0a761cf08ee7476c63cffa Mon Sep 17 00:00:00 2001
From: Christian <christianpavilonis@outlook.com>
Date: Fri, 29 May 2026 10:25:22 -0500
Subject: [PATCH 6/7] Address remaining Spin PR feedback

---
 .github/workflows/test.yml                 | 2 +-
 crates/mocktioneer-adapter-spin/Cargo.toml | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8d8031c..935029f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -47,7 +47,7 @@ jobs:
         run: rustup target add wasm32-wasip1
 
       - name: Setup Viceroy
-        run: cargo install viceroy --locked
+        run: cargo install viceroy --version 0.17.0 --locked
 
       - name: Fetch dependencies (locked)
         run: cargo fetch --locked
diff --git a/crates/mocktioneer-adapter-spin/Cargo.toml b/crates/mocktioneer-adapter-spin/Cargo.toml
index 991a803..5ca3736 100644
--- a/crates/mocktioneer-adapter-spin/Cargo.toml
+++ b/crates/mocktioneer-adapter-spin/Cargo.toml
@@ -14,7 +14,6 @@ default = []
 spin = ["edgezero-adapter-spin/spin"]
 
 [dependencies]
-edgezero-adapter-spin = { workspace = true }
 edgezero-core = { workspace = true }
 mocktioneer-core = { workspace = true }
 

From e96c2b63a300c706ae880aeeaa10e04dd1181d3f Mon Sep 17 00:00:00 2001
From: Christian <christianpavilonis@outlook.com>
Date: Wed, 10 Jun 2026 11:54:17 -0500
Subject: [PATCH 7/7] Fix Spin wasm CI check

---
 .github/workflows/test.yml                 | 7 +++++--
 crates/mocktioneer-adapter-spin/src/lib.rs | 3 ++-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 935029f..f25a82e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -43,8 +43,8 @@ jobs:
         with:
           toolchain: ${{ steps.rust-version.outputs.rust-version }}
 
-      - name: Add wasm32-wasi target
-        run: rustup target add wasm32-wasip1
+      - name: Add WASM targets
+        run: rustup target add wasm32-wasip1 wasm32-wasip2
 
       - name: Setup Viceroy
         run: cargo install viceroy --version 0.17.0 --locked
@@ -58,6 +58,9 @@ jobs:
       - name: Check feature compilation
         run: cargo check --workspace --all-targets --features "fastly cloudflare spin"
 
+      - name: Check Spin WASM target
+        run: cargo check --target wasm32-wasip2 -p mocktioneer-adapter-spin --features spin
+
   playwright:
     name: playwright tests
     runs-on: ubuntu-latest
diff --git a/crates/mocktioneer-adapter-spin/src/lib.rs b/crates/mocktioneer-adapter-spin/src/lib.rs
index bd71e31..22e4a97 100644
--- a/crates/mocktioneer-adapter-spin/src/lib.rs
+++ b/crates/mocktioneer-adapter-spin/src/lib.rs
@@ -17,5 +17,6 @@ use spin_sdk::http_component;
 #[cfg(target_arch = "wasm32")]
 #[http_component]
 async fn handle(req: IncomingRequest) -> anyhow::Result<impl IntoResponse> {
-    edgezero_adapter_spin::run_app::<MocktioneerApp>(req).await
+    edgezero_adapter_spin::run_app::<MocktioneerApp>(include_str!("../../../edgezero.toml"), req)
+        .await
 }