diff --git a/.forgejo/workflows/ci.yml b/.forgejo/workflows/ci.yml
new file mode 100644
index 0000000..84e5e36
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+++ b/.forgejo/workflows/ci.yml
@@ -0,0 +1,41 @@
+# Forgejo Actions CI for Colibri.
+#
+# Gates every push to main and every pull request on the same checks agents are
+# expected to run locally (./scripts/ci-checks.sh): rustfmt, clippy, workspace
+# tests, and the markdown format gate. This is what would have caught the
+# build-break that PR #23 had to fix.
+#
+# Requirements (verify on the Forgejo instance):
+#   - A registered Forgejo Actions runner whose labels include `ubuntu-latest`
+#     (adjust `runs-on` below to match your runner's label if different).
+#   - The runner can pull the `rust` and `node` container images and reach
+#     crates.io / npm for dependencies.
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  rust:
+    runs-on: ubuntu-latest
+    container: rust:1.95
+    steps:
+      - uses: actions/checkout@v4
+      - name: Ensure rustfmt + clippy are present
+        run: rustup component add rustfmt clippy
+      - name: cargo fmt --check
+        run: cargo fmt --check
+      - name: cargo clippy (warnings = errors)
+        run: cargo clippy --workspace --all-targets -- -D warnings
+      - name: cargo test --workspace
+        run: cargo test --workspace
+
+  markdown:
+    runs-on: ubuntu-latest
+    container: node:20
+    steps:
+      - uses: actions/checkout@v4
+      - name: Markdown format gate
+        run: ./scripts/check-format.sh
diff --git a/scripts/ci-checks.sh b/scripts/ci-checks.sh
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index 0000000..bf33164
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+++ b/scripts/ci-checks.sh
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+#!/bin/sh
+# Run every repository gate, the same set CI runs. Use this before pushing.
+#
+#   ./scripts/ci-checks.sh
+#
+# Gates: rustfmt, clippy (warnings = errors), workspace tests, markdown format.
+
+set -eu
+
+ROOT_DIR="$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)"
+cd "$ROOT_DIR"
+
+echo "==> cargo fmt --check"
+cargo fmt --check
+
+echo "==> cargo clippy --workspace --all-targets -- -D warnings"
+cargo clippy --workspace --all-targets -- -D warnings
+
+echo "==> cargo test --workspace"
+cargo test --workspace
+
+echo "==> markdown format gate"
+./scripts/check-format.sh
+
+echo "All checks passed."