diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..61f91f2
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,32 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  offline-suite:
+    name: pytest + ruff + mypy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Install (editable + dev extras)
+        run: |
+          python -m pip install --upgrade pip
+          pip install -e ".[dev]"
+
+      - name: Tests (offline, deterministic)
+        # Mirrors FAST=1 in scripts/reproduce_all.sh: the slow SIGKILL
+        # recovery suite stays a local/pre-release gate.
+        run: pytest -q -m "not slow"
+
+      - name: Ruff
+        run: ruff check
+
+      - name: mypy (strict)
+        run: mypy src/agentcorp
diff --git a/README.md b/README.md
index 709d0f9..3cf8f40 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # AgentCorp — Recursive Delivery OS
 
+[![CI](https://github.com/CodeAlex52/AgentCorp/actions/workflows/ci.yml/badge.svg)](https://github.com/CodeAlex52/AgentCorp/actions/workflows/ci.yml)
+
 > `(git repo, natural-language PRD)` → **reviewed, tested delivery** + auditable event ledger + reproducible benchmark report.
 
 AgentCorp is a local-first, event-sourced, crash-recoverable, budget-bounded multi-agent