diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b0f63d1..80551f0 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -40,8 +40,9 @@ jobs:
       - name: Build wheel and sdist
         run: python -m build
 
+      # upload-artifact is still on v6; download-artifact moved to v7 for Node 24.
       - name: Upload release artifacts
-        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
         with:
           name: python-package-distributions
           path: dist/
@@ -58,18 +59,57 @@ jobs:
 
     steps:
       - name: Download release artifacts
-        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
+        uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131 # v7
         with:
           name: python-package-distributions
           path: dist/
 
+      - name: Check whether version already exists on PyPI
+        id: check-pypi-version
+        env:
+          # Keep this in sync with [project.name] in pyproject.toml.
+          PACKAGE_NAME: oacp-cli
+          PACKAGE_VERSION: ${{ github.ref_name }}
+        run: |
+          python - <<'PY'
+          import json
+          import os
+          import urllib.error
+          import urllib.request
+
+          package = os.environ["PACKAGE_NAME"]
+          version = os.environ["PACKAGE_VERSION"].removeprefix("v")
+          url = f"https://pypi.org/pypi/{package}/json"
+
+          try:
+              with urllib.request.urlopen(url, timeout=30) as response:
+                  releases = json.load(response).get("releases", {})
+          except urllib.error.HTTPError as exc:
+              if exc.code == 404:
+                  releases = {}
+              else:
+                  raise
+
+          version_exists = version in releases
+          with open(os.environ["GITHUB_OUTPUT"], "a", encoding="utf-8") as fh:
+              fh.write(f"version_exists={'true' if version_exists else 'false'}\n")
+
+          if version_exists:
+              print(f"PyPI already has {package} {version}; skipping publish.")
+          else:
+              print(f"PyPI does not have {package} {version}; proceeding with publish.")
+          PY
+
       - name: Publish to PyPI
+        if: steps.check-pypi-version.outputs.version_exists != 'true'
         uses: pypa/gh-action-pypi-publish@ed0c53931b1dc9bd32cbe73a98c7f6766f8a527e # v1.13.0
 
+      - name: Skip duplicate PyPI publish
+        if: steps.check-pypi-version.outputs.version_exists == 'true'
+        run: echo "PyPI already has ${GITHUB_REF_NAME#v}; skipping upload."
+
   github-release:
-    needs:
-      - build
-      - publish-pypi
+    needs: build
     runs-on: ubuntu-latest
     permissions:
       contents: write
@@ -78,13 +118,19 @@ jobs:
       - name: Check out repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
+      # download-artifact v7 is the current Node 24-compatible major.
       - name: Download release artifacts
-        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
+        uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131 # v7
         with:
           name: python-package-distributions
           path: dist/
 
-      - name: Create GitHub Release
+      - name: Create or update GitHub Release
         env:
           GH_TOKEN: ${{ github.token }}
-        run: gh release create "${GITHUB_REF_NAME}" dist/* --generate-notes --verify-tag
+        run: |
+          if gh release view "${GITHUB_REF_NAME}" >/dev/null 2>&1; then
+            gh release upload "${GITHUB_REF_NAME}" dist/* --clobber
+          else
+            gh release create "${GITHUB_REF_NAME}" dist/* --generate-notes --verify-tag
+          fi
diff --git a/.gitignore b/.gitignore
index 7278175..8450f7b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,9 @@
 .oacp
 .agent-hub
+.agents/
 AGENTS.md
 CLAUDE.md
+GEMINI.md
 .worktrees/
 __pycache__/
 *.pyc
diff --git a/README.md b/README.md
index 270a292..43e4a66 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,10 @@
 # OACP — Open Agent Coordination Protocol
 
+[![PyPI](https://img.shields.io/pypi/v/oacp-cli)](https://pypi.org/project/oacp-cli/)
 [![License](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](LICENSE)
+[![Claude Code](https://img.shields.io/badge/Runtime-Claude_Code-6B4FBB.svg)](https://claude.ai/code)
+[![Codex](https://img.shields.io/badge/Runtime-Codex-74AA9C.svg)](https://openai.com/index/codex/)
+[![PRs Welcome](https://img.shields.io/badge/PRs-Welcome-brightgreen)](https://github.com/kiloloop/oacp/pulls)
 
 **Empowering solo founders to coordinate AI agents, with human-in-the-loop for control.**
 
diff --git a/pyproject.toml b/pyproject.toml
index 621e4d3..60b70aa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "oacp-cli"
-version = "0.1.0rc1"
+version = "0.1.0"
 description = "Open Agent Coordination Protocol CLI for file-based multi-agent workflows"
 readme = "README.md"
 license = "Apache-2.0"
diff --git a/tests/test_github_workflows.py b/tests/test_github_workflows.py
index ac5d2cd..2d3d946 100644
--- a/tests/test_github_workflows.py
+++ b/tests/test_github_workflows.py
@@ -50,13 +50,29 @@ def test_release_workflow_publishes_with_trusted_publishing() -> None:
     publish_job = workflow["jobs"]["publish-pypi"]
     assert publish_job["environment"]["name"] == "pypi"
     assert publish_job["permissions"]["id-token"] == "write"
-    assert publish_job["steps"][0]["uses"].startswith("actions/download-artifact@")
-    assert publish_job["steps"][-1]["uses"].startswith("pypa/gh-action-pypi-publish@")
+    publish_step_names = {step["name"]: step for step in publish_job["steps"]}
+    assert publish_step_names["Download release artifacts"]["uses"].startswith(
+        "actions/download-artifact@"
+    )
+    assert publish_step_names["Check whether version already exists on PyPI"]["id"] == (
+        "check-pypi-version"
+    )
+    assert publish_step_names["Publish to PyPI"]["if"] == (
+        "steps.check-pypi-version.outputs.version_exists != 'true'"
+    )
+    assert publish_step_names["Publish to PyPI"]["uses"].startswith(
+        "pypa/gh-action-pypi-publish@"
+    )
+    assert publish_step_names["Skip duplicate PyPI publish"]["if"] == (
+        "steps.check-pypi-version.outputs.version_exists == 'true'"
+    )
 
     release_job = workflow["jobs"]["github-release"]
-    assert set(release_job["needs"]) == {"build", "publish-pypi"}
+    assert release_job["needs"] == "build"
     assert release_job["permissions"]["contents"] == "write"
     release_step_names = {step["name"]: step for step in release_job["steps"]}
     assert release_step_names["Check out repository"]["uses"].startswith("actions/checkout@")
     assert release_step_names["Download release artifacts"]["uses"].startswith("actions/download-artifact@")
-    assert "gh release create" in release_step_names["Create GitHub Release"]["run"]
+    assert "gh release view" in release_step_names["Create or update GitHub Release"]["run"]
+    assert "gh release upload" in release_step_names["Create or update GitHub Release"]["run"]
+    assert "gh release create" in release_step_names["Create or update GitHub Release"]["run"]