From e8adebdd6e5712261d6201ded0dd0cec8a55e919 Mon Sep 17 00:00:00 2001
From: Matthias Wende <code@matthiaswende.de>
Date: Mon, 6 Apr 2026 14:20:42 +0200
Subject: [PATCH 1/2] ci: add GitHub Actions workflow

---
 .github/workflows/ci.yml | 62 ++++++++++++++++++++++++++++++++++++++++
 README.md                |  3 ++
 2 files changed, 65 insertions(+)
 create mode 100644 .github/workflows/ci.yml

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..d80b51d
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,62 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  fmt:
+    name: Formatting
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+      - run: cargo fmt -- --check
+
+  clippy:
+    name: Clippy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo clippy --all-targets --all-features -- -D warnings
+
+  test:
+    name: Tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo test --all-features
+
+  coverage:
+    name: Coverage
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: llvm-tools-preview
+      - uses: Swatinem/rust-cache@v2
+      - name: Install cargo-llvm-cov
+        uses: taiki-e/install-action@cargo-llvm-cov
+      - name: Generate coverage
+        run: cargo llvm-cov --all-features --lcov --output-path lcov.info
+      - name: Print coverage summary
+        run: cargo llvm-cov report --summary-only
+      - name: Upload to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          files: lcov.info
+          fail_ci_if_error: false
+          # token: ${{ secrets.CODECOV_TOKEN }}  # required for private repos
diff --git a/README.md b/README.md
index 942a789..709cbb8 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
 # tiny-mb
 
+[![CI](https://github.com/mattwend/tiny-mb/actions/workflows/ci.yml/badge.svg)](https://github.com/mattwend/tiny-mb/actions/workflows/ci.yml)
+[![codecov](https://codecov.io/gh/mattwend/tiny-mb/branch/main/graph/badge.svg)](https://codecov.io/gh/mattwend/tiny-mb)
+
 Small Rust Modbus library with typed request/response PDUs and a reusable Modbus TCP transport.
 
 ## Features

From 12cb8e5bf0ba6890830ef4fb17ec2d9061791bf1 Mon Sep 17 00:00:00 2001
From: Matthias Wende <code@matthiaswende.de>
Date: Mon, 6 Apr 2026 14:21:19 +0200
Subject: [PATCH 2/2] ci: add codecov configuration

---
 codecov.yml | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 codecov.yml

diff --git a/codecov.yml b/codecov.yml
new file mode 100644
index 0000000..4e6a1d1
--- /dev/null
+++ b/codecov.yml
@@ -0,0 +1,22 @@
+codecov:
+  require_ci_to_pass: true
+
+coverage:
+  precision: 2
+  round: nearest
+  range: 0...100
+
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 1%
+    patch:
+      default:
+        target: auto
+        threshold: 1%
+
+comment:
+  layout: "diff, flags, files"
+  behavior: default
+  require_changes: false