diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..5fe3721
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,40 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  zig:
+    name: Zig 0.16
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+
+      - uses: mlugg/setup-zig@v2
+        with:
+          version: 0.16.0
+
+      - name: Check formatting
+        run: zig fmt --check $(git ls-files '*.zig')
+
+      - name: Run tests
+        # Zig 0.16's x86_64 Linux Debug compiler crashes while compiling the
+        # CLI test root; ReleaseSafe preserves runtime checks and test coverage.
+        run: zig build test -Doptimize=ReleaseSafe -j1 --summary all
+
+      - name: Build
+        run: zig build -Doptimize=ReleaseSafe --summary all
+
+      - name: Smoke test the CLI
+        run: |
+          ./zig-out/bin/cell-render --synthetic gradient --width 16 --height 4 --mode density --color none
+          ./zig-out/bin/cell-render --input testdata/diagonal.ppm --width 1 --height 1 --mode partition --partition quadrant --color none
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 66648d1..816fc8e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+## v0.2.0 - 2026-07-28
+
 ### Library
 
 - Added a **Mermaid `mindmap`** frontend (`src/diagram/mermaid/mindmap.zig`): an
diff --git a/VERSION_CHECKLIST.md b/VERSION_CHECKLIST.md
index e30a3c8..f96173e 100644
--- a/VERSION_CHECKLIST.md
+++ b/VERSION_CHECKLIST.md
@@ -1,6 +1,6 @@
-# v0.1.0 Tag Checklist
+# v0.2.0 Tag Checklist
 
-Use this before cutting the first public tag.
+Use this before cutting the v0.2.0 public tag.
 
 ## Required Checks
 
@@ -15,18 +15,18 @@ zig build run -- --input testdata/diagonal.ppm --width 1 --height 1 --mode parti
 
 ## Release Notes
 
-- Raw RGBA core API.
-- Density, half-block, quadrant, and Braille output.
-- Ordered dithering.
-- Streaming ANSI writer.
-- Synthetic CLI inputs.
-- PPM/PAM fixture input outside core.
-- Synthetic benchmark command.
+- Semantic Mermaid rendering for flowcharts, sequences, state, class, ER, C4,
+  architecture, card, and mindmap diagrams.
+- Shared `CellCanvas` terminal drawing substrate.
+- Sextant and octant sub-cell image partitions.
+- Floyd-Steinberg dithering and ANSI 16/256-color output.
+- Real-font headless visual review with `glyphshot`.
+- Automated quality corpus and visual-gallery tooling.
 
 ## Pre-Tag Review
 
 - Confirm `build.zig.zon` version.
-- Confirm `CHANGELOG.md` has the intended v0.1.0 section.
+- Confirm `CHANGELOG.md` has the intended v0.2.0 section.
 - Confirm no decoder is exported from `src/root.zig`.
 - Confirm benchmark numbers are refreshed or explicitly marked as historical.
 - Confirm GitHub remote is correct.
@@ -34,7 +34,7 @@ zig build run -- --input testdata/diagonal.ppm --width 1 --height 1 --mode parti
 ## Tag Commands
 
 ```sh
-git tag -a v0.1.0 -m "v0.1.0"
+git tag -a v0.2.0 -m "v0.2.0"
 git push origin main
-git push origin v0.1.0
+git push origin v0.2.0
 ```
diff --git a/build.zig.zon b/build.zig.zon
index 73153d3..0fbf7cf 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -1,6 +1,6 @@
 .{
     .name = .image_to_ascii,
-    .version = "0.1.0",
+    .version = "0.2.0",
     .fingerprint = 0x55f66561244cdf41, // Changing this has security and trust implications.
     .minimum_zig_version = "0.16.0",
     .dependencies = .{