Support musl targets for x86_64 and aarch64

.github/workflows/ci.yml

@@ -22,6 +22,18 @@ jobs:
       - run: cargo test --quiet
       - run: cargo build --quiet --release
 
+  musl:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: x86_64-unknown-linux-musl
+      - name: Install musl toolchain
+        run: sudo apt-get update && sudo apt-get install -y musl-tools
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo build --quiet --release --target x86_64-unknown-linux-musl
+
   bench:
     runs-on: ubuntu-latest
     steps:

.github/workflows/release.yml

@@ -17,6 +17,10 @@ jobs:
             musl: true
           - target: aarch64-unknown-linux-gnu
             os: ubuntu-24.04-arm
+          - target: aarch64-unknown-linux-musl
+            os: ubuntu-24.04-arm
+            # musl support for ARM64 targets Alpine and other musl-libc systems on ARM.
+            musl: true
           - target: x86_64-apple-darwin
             # macos-13 (the last plain Intel image) was retired in Dec 2025;
             # macos-15-intel is the designated replacement.
@@ -75,7 +79,7 @@ jobs:
           if-no-files-found: error
           retention-days: 1
 
-  # Single fan-in publisher: four matrix legs racing to create the same
+  # Single fan-in publisher: six matrix legs racing to create the same
   # release is a known 422 flake in action-gh-release.
   release:
     needs: build

README.md

@@ -35,6 +35,8 @@ curl -fsSL https://postil.dev/install.sh | sh
 cargo install --git https://github.com/postil-dev/postil-cli --locked
 ```
 
+Prebuilt binaries are available for Linux (x86_64 and aarch64), macOS (Intel and Apple Silicon), and glibc and musl libc variants. The installer script automatically detects your system and platform and downloads the appropriate binary. For Alpine Linux and other musl-libc systems, the installer provides statically linked musl binaries.
+
 ## Quick start
 
 ```sh
@@ -209,6 +211,10 @@ Postil reviews only the new commits, marks earlier findings whose code was chang
 resolved, and carries still-open findings forward so the gate cannot be cleared by
 pushing an unrelated commit.
 
+Bitbucket incremental reviews are disabled unless
+`POSTIL_ENABLE_BITBUCKET_INCREMENTAL=1` is set. Set it only after validating the
+`/diff/{head}..{since}` compare path against the target Bitbucket deployment.
+
 ## The envelope
 
 `--output-json` prints a stable versioned envelope (`summary`, `silent`, `findings`,