diff --git a/tools/codegen/src/lib.rs b/tools/codegen/src/lib.rs
index 4211e679..41ced542 100644
--- a/tools/codegen/src/lib.rs
+++ b/tools/codegen/src/lib.rs
@@ -2,11 +2,89 @@
 
 #![allow(clippy::missing_panics_doc, clippy::too_long_first_doc_paragraph)]
 
-use std::{env, path::Path};
+use std::{collections::BTreeMap, env, path::Path};
 
 pub use install_action_manifest_schema::*;
+use serde_derive::Deserialize;
 
 #[must_use]
 pub fn workspace_root() -> &'static Path {
     Path::new(env!("CARGO_MANIFEST_DIR").strip_suffix("tools/codegen").unwrap())
 }
+
+#[derive(Debug, Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct BaseManifest {
+    /// Link to the GitHub repository.
+    pub repository: String,
+    /// Alternative link for the project.  Automatically detected if possible.
+    pub website: Option<String>,
+    /// Markdown syntax for links to licenses.  Automatically detected if possible.
+    pub license_markdown: Option<String>,
+    /// Prefix of release tag.
+    pub tag_prefix: String,
+    /// Crate name, if this is Rust crate.
+    pub rust_crate: Option<String>,
+    pub default_major_version: Option<String>,
+    /// Asset name patterns.
+    pub asset_name: Option<StringOrArray>,
+    /// Path to binaries in archive. Default to `${tool}${exe}`.
+    pub bin: Option<StringOrArray>,
+    pub signing: Option<Signing>,
+    #[serde(default)]
+    pub broken: Vec<semver::Version>,
+    pub version_range: Option<String>,
+    /// Use glibc build if host_env is gnu.
+    #[serde(default)]
+    pub prefer_linux_gnu: bool,
+    /// Check that the version is yanked not only when updating the manifest,
+    /// but also when running the action.
+    #[serde(default)]
+    pub immediate_yank_reflection: bool,
+    pub platform: BTreeMap<HostPlatform, BaseManifestPlatformInfo>,
+}
+impl BaseManifest {
+    /// Validate the manifest.
+    pub fn validate(&self) {
+        for bin in self.bin.iter().chain(self.platform.values().flat_map(|m| &m.bin)) {
+            assert!(!bin.as_slice().is_empty());
+            for bin in bin.as_slice() {
+                let file_name = Path::new(bin).file_name().unwrap().to_str().unwrap();
+                if !self.repository.ends_with("/xbuild") {
+                    assert!(
+                        !(file_name.contains("${version") || file_name.contains("${rust")),
+                        "{bin}"
+                    );
+                }
+            }
+        }
+        if self.platform.is_empty() {
+            panic!("At least one platform must be specified");
+        }
+    }
+}
+
+#[derive(Debug, Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct Signing {
+    pub kind: SigningKind,
+}
+
+#[derive(Debug, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "kebab-case")]
+#[serde(deny_unknown_fields)]
+pub enum SigningKind {
+    /// algorithm: minisign
+    /// public key: package.metadata.binstall.signing.pubkey at Cargo.toml
+    /// <https://github.com/cargo-bins/cargo-binstall/blob/HEAD/SIGNING.md>
+    MinisignBinstall,
+}
+
+#[derive(Debug, Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct BaseManifestPlatformInfo {
+    /// Asset name patterns. Default to the value at `BaseManifest::asset_name`.
+    pub asset_name: Option<StringOrArray>,
+    /// Path to binaries in archive. Default to the value at `BaseManifest::bin`.
+    pub bin: Option<StringOrArray>,
+}
diff --git a/tools/manifest-schema/src/lib.rs b/tools/manifest-schema/src/lib.rs
index cfcf2ae1..573680bc 100644
--- a/tools/manifest-schema/src/lib.rs
+++ b/tools/manifest-schema/src/lib.rs
@@ -41,7 +41,6 @@ use core::{
     fmt, slice,
     str::FromStr,
 };
-use std::path::Path;
 
 use serde::{
     de::{self, Deserialize, Deserializer},
@@ -245,83 +244,6 @@ pub struct ManifestTemplateDownloadInfo {
     pub bin: Option<StringOrArray>,
 }
 
-#[derive(Debug, Deserialize)]
-#[serde(deny_unknown_fields)]
-pub struct BaseManifest {
-    /// Link to the GitHub repository.
-    pub repository: String,
-    /// Alternative link for the project.  Automatically detected if possible.
-    pub website: Option<String>,
-    /// Markdown syntax for links to licenses.  Automatically detected if possible.
-    pub license_markdown: Option<String>,
-    /// Prefix of release tag.
-    pub tag_prefix: String,
-    /// Crate name, if this is Rust crate.
-    pub rust_crate: Option<String>,
-    pub default_major_version: Option<String>,
-    /// Asset name patterns.
-    pub asset_name: Option<StringOrArray>,
-    /// Path to binaries in archive. Default to `${tool}${exe}`.
-    pub bin: Option<StringOrArray>,
-    pub signing: Option<Signing>,
-    #[serde(default)]
-    pub broken: Vec<semver::Version>,
-    pub version_range: Option<String>,
-    /// Use glibc build if host_env is gnu.
-    #[serde(default)]
-    pub prefer_linux_gnu: bool,
-    /// Check that the version is yanked not only when updating the manifest,
-    /// but also when running the action.
-    #[serde(default)]
-    pub immediate_yank_reflection: bool,
-    pub platform: BTreeMap<HostPlatform, BaseManifestPlatformInfo>,
-}
-impl BaseManifest {
-    /// Validate the manifest.
-    pub fn validate(&self) {
-        for bin in self.bin.iter().chain(self.platform.values().flat_map(|m| &m.bin)) {
-            assert!(!bin.as_slice().is_empty());
-            for bin in bin.as_slice() {
-                let file_name = Path::new(bin).file_name().unwrap().to_str().unwrap();
-                if !self.repository.ends_with("/xbuild") {
-                    assert!(
-                        !(file_name.contains("${version") || file_name.contains("${rust")),
-                        "{bin}"
-                    );
-                }
-            }
-        }
-        if self.platform.is_empty() {
-            panic!("At least one platform must be specified");
-        }
-    }
-}
-
-#[derive(Debug, Deserialize)]
-#[serde(deny_unknown_fields)]
-pub struct Signing {
-    pub kind: SigningKind,
-}
-
-#[derive(Debug, Deserialize, PartialEq, Eq)]
-#[serde(rename_all = "kebab-case")]
-#[serde(deny_unknown_fields)]
-pub enum SigningKind {
-    /// algorithm: minisign
-    /// public key: package.metadata.binstall.signing.pubkey at Cargo.toml
-    /// <https://github.com/cargo-bins/cargo-binstall/blob/HEAD/SIGNING.md>
-    MinisignBinstall,
-}
-
-#[derive(Debug, Deserialize)]
-#[serde(deny_unknown_fields)]
-pub struct BaseManifestPlatformInfo {
-    /// Asset name patterns. Default to the value at `BaseManifest::asset_name`.
-    pub asset_name: Option<StringOrArray>,
-    /// Path to binaries in archive. Default to the value at `BaseManifest::bin`.
-    pub bin: Option<StringOrArray>,
-}
-
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 #[serde(untagged)]
 pub enum StringOrArray {