diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b35a5bda..1a109094 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,6 +22,8 @@ env:
   RUST_BACKTRACE: 1
   RUSTFLAGS: -D warnings
   RUSTUP_MAX_RETRIES: 10
+  # NB: sync with miri job's --exclude option
+  EXCLUDE: --exclude install-action-internal-codegen
 
 defaults:
   run:
@@ -32,6 +34,16 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  miri:
+    uses: taiki-e/github-actions/.github/workflows/miri.yml@main
+    with:
+      event_name: ${{ github.event_name }}
+      # NB: sync with env.EXCLUDE
+      args: --exclude install-action-internal-codegen
+  msrv:
+    uses: taiki-e/github-actions/.github/workflows/msrv.yml@main
+    with:
+      event_name: ${{ github.event_name }}
   tidy:
     uses: taiki-e/github-actions/.github/workflows/tidy.yml@main
     permissions:
@@ -265,3 +277,25 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           PR_NUMBER: ${{ steps.create-pull-request.outputs.pull-request-number }}
         if: github.repository_owner == 'taiki-e' && (github.event_name == 'schedule' || github.event_name == 'push' && github.ref == 'refs/heads/main') && steps.diff.outputs.success == 'false' && (steps.create-pull-request.outputs.pull-request-operation == 'created' || steps.create-pull-request.outputs.pull-request-operation == 'updated')
+
+  manifest-schema:
+    strategy:
+      fail-fast: false
+      matrix:
+        rust:
+          - stable
+          - beta
+          - nightly
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    steps:
+      - uses: taiki-e/checkout-action@v1
+      - uses: taiki-e/github-actions/install-rust@main
+        with:
+          toolchain: ${{ matrix.rust }}
+      - uses: taiki-e/install-action@cargo-hack
+      - uses: taiki-e/install-action@cargo-minimal-versions
+      - run: cargo test --workspace --all-features ${EXCLUDE}
+      - run: cargo hack build --workspace --no-private --feature-powerset --no-dev-deps
+      - run: cargo minimal-versions build --workspace --no-private --detach-path-deps=skip-exact --all-features
+      - run: cargo minimal-versions build --workspace --no-private --detach-path-deps=skip-exact --all-features --direct
diff --git a/tools/manifest-schema/Cargo.toml b/tools/manifest-schema/Cargo.toml
index 124df45c..e7ba380d 100644
--- a/tools/manifest-schema/Cargo.toml
+++ b/tools/manifest-schema/Cargo.toml
@@ -2,16 +2,33 @@
 name = "install-action-manifest-schema"
 version = "0.1.0"
 edition = "2021"
-license = "MIT OR Apache-2.0"
+rust-version = "1.79" # Align to cargo-binstall: https://crates.io/crates/cargo-binstall
+license = "Apache-2.0 OR MIT"
+repository = "https://github.com/taiki-e/install-action"
+keywords = []
+categories = []
+description = """
+Structured access to the install-action manifests.
+"""
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
+
+[package.metadata.cargo_check_external_types]
+# The following are external types that are allowed to be exposed in our public API.
+allowed_external_types = [
+    "semver::*",
+    "serde::*",
+]
+
+[lib]
+doc-scrape-examples = false
 
 # Note: semver and serde are public dependencies.
 [dependencies]
 semver = { version = "1", features = ["serde"] }
-serde = "1"
-serde_derive = "1"
+serde = "1.0.165"
+serde_derive = "1.0.165"
 
 [lints]
 workspace = true
-
-[package.metadata.cargo_check_external_types]
-allowed_external_types = ["semver::*", "serde::*"]
diff --git a/tools/manifest-schema/src/lib.rs b/tools/manifest-schema/src/lib.rs
index ffe6426e..332da160 100644
--- a/tools/manifest-schema/src/lib.rs
+++ b/tools/manifest-schema/src/lib.rs
@@ -1,5 +1,28 @@
 // SPDX-License-Identifier: Apache-2.0 OR MIT
 
+/*!
+Structured access to the install-action manifests.
+*/
+
+#![doc(test(
+    no_crate_inject,
+    attr(
+        deny(warnings, rust_2018_idioms, single_use_lifetimes),
+        allow(dead_code, unused_variables)
+    )
+))]
+#![warn(
+    // Lints that may help when writing public library.
+    missing_debug_implementations,
+    // missing_docs,
+    clippy::alloc_instead_of_core,
+    // clippy::exhaustive_enums,
+    // clippy::exhaustive_structs,
+    clippy::impl_trait_in_params,
+    // clippy::missing_inline_in_public_items,
+    // clippy::std_instead_of_alloc,
+    // clippy::std_instead_of_core,
+)]
 #![allow(clippy::missing_panics_doc, clippy::too_long_first_doc_paragraph)]
 
 use std::{
@@ -303,7 +326,7 @@ impl StringOrArray {
         }
     }
     #[must_use]
-    pub fn map(&self, mut f: impl FnMut(&String) -> String) -> Self {
+    pub fn map<F: FnMut(&String) -> String>(&self, mut f: F) -> Self {
         match self {
             Self::String(s) => Self::String(f(s)),
             Self::Array(v) => Self::Array(v.iter().map(f).collect()),