diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 89011bf0f5..d25d3641a5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,15 +36,17 @@ jobs:
     if: (github.event_name == 'push' || (github.event_name == 'workflow_dispatch' && inputs.release_pr && github.ref == 'refs/heads/release-please--branches--main') || github.event.pull_request.head.repo.fork) && (github.event_name != 'push' || github.event.head_commit.message != 'codegen metadata')
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        with:
+          persist-credentials: false
 
-      - name: Set up Rye
-        uses: eifinger/setup-rye@c694239a43768373e87d0103d7f547027a23f3c8
+      - name: Set up uv
+        uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
         with:
-          version: '0.44.0'
+          version: '0.12.5'
           enable-cache: true
 
       - name: Install dependencies
-        run: rye sync --all-features
+        run: ./scripts/ci-bootstrap
 
       - name: Run lints
         run: ./scripts/lint
@@ -61,26 +63,26 @@ jobs:
         with:
           persist-credentials: false
 
-      - name: Set up Rye
-        uses: eifinger/setup-rye@c694239a43768373e87d0103d7f547027a23f3c8
+      - name: Set up uv
+        uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
         with:
-          version: '0.44.0'
+          version: '0.12.5'
           enable-cache: true
 
       - name: Install dependencies
-        run: rye sync --all-features
+        run: ./scripts/ci-bootstrap
 
       - name: Run build
-        run: rye build
+        run: uv build
 
       - name: Validate Python version metadata
-        run: rye run python scripts/utils/validate-python-version-wheel.py
+        run: .venv/bin/python scripts/utils/validate-python-version-wheel.py
 
       - name: Validate Bedrock wheel
-        run: rye run python scripts/utils/validate-bedrock-wheel.py
+        run: .venv/bin/python scripts/utils/validate-bedrock-wheel.py
 
       - name: Validate HTTPX2 wheel on Python 3.10
-        run: rye run python scripts/utils/validate-httpx2-wheel.py
+        run: .venv/bin/python scripts/utils/validate-httpx2-wheel.py
 
       - name: Set up Python 3.9 for resolver rejection
         uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
@@ -154,6 +156,8 @@ jobs:
         python-version: ["3.10", "3.14"]
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        with:
+          persist-credentials: false
 
       - name: Set up Python ${{ matrix.python-version }}
         id: setup-python
@@ -161,19 +165,18 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
-      - name: Set up Rye
-        uses: eifinger/setup-rye@c694239a43768373e87d0103d7f547027a23f3c8
+      - name: Set up uv
+        uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
         with:
-          version: '0.44.0'
+          version: '0.12.5'
           enable-cache: false
 
       - name: Select Python ${{ matrix.python-version }}
         run: |
-          rye toolchain register "${{ steps.setup-python.outputs.python-path }}"
-          rye pin --relaxed --no-update-requires-python "${{ matrix.python-version }}"
+          echo 'UV_PYTHON=${{ steps.setup-python.outputs.python-path }}' >> "$GITHUB_ENV"
 
       - name: Bootstrap
-        run: ./scripts/bootstrap
+        run: ./scripts/ci-bootstrap
 
       - name: Run tests
         run: ./scripts/test
@@ -185,6 +188,8 @@ jobs:
     if: github.event_name == 'push' || (github.event_name == 'workflow_dispatch' && inputs.release_pr && github.ref == 'refs/heads/release-please--branches--main') || github.event.pull_request.head.repo.fork
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        with:
+          persist-credentials: false
 
       - name: Set up Python 3.14
         id: setup-python
@@ -192,17 +197,15 @@ jobs:
         with:
           python-version: '3.14'
 
-      - name: Set up Rye
-        uses: eifinger/setup-rye@c694239a43768373e87d0103d7f547027a23f3c8
+      - name: Set up uv
+        uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
         with:
-          version: '0.44.0'
+          version: '0.12.5'
           enable-cache: false
 
       - name: Install HTTPX2 test dependencies
         run: |
-          rye toolchain register "${{ steps.setup-python.outputs.python-path }}"
-          rye pin --relaxed --no-update-requires-python 3.14
-          rye sync --all-features
+          UV_PYTHON="${{ steps.setup-python.outputs.python-path }}" ./scripts/ci-bootstrap
 
       - name: Run tests with HTTPX and HTTPX2 installed
         env:
@@ -219,28 +222,30 @@ jobs:
     name: examples
     environment: ci
     runs-on: ${{ startsWith(github.repository, 'stainless-sdks/') && 'depot-ubuntu-24.04' || 'ubuntu-latest' }}
-    if: github.repository == 'openai/openai-python' && (github.event_name == 'push' || github.event.pull_request.head.repo.fork) && (github.event_name != 'push' || github.event.head_commit.message != 'codegen metadata')
+    if: github.repository == 'openai/openai-python' && github.event_name == 'push' && github.ref == 'refs/heads/main'
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        with:
+          persist-credentials: false
 
-      - name: Set up Rye
-        uses: eifinger/setup-rye@c694239a43768373e87d0103d7f547027a23f3c8
+      - name: Set up uv
+        uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
         with:
-          version: '0.44.0'
+          version: '0.12.5'
           enable-cache: true
       - name: Install dependencies
         run: |
-          rye sync --all-features
+          ./scripts/ci-bootstrap
 
       - env:
           OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
         run: |
-            rye run python examples/demo.py
+            .venv/bin/python examples/demo.py
       - env:
           OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
         run: |
-            rye run python examples/async_demo.py
+            .venv/bin/python examples/async_demo.py
 
   python-policy:
     timeout-minutes: 5
@@ -289,24 +294,23 @@ jobs:
           python-version: ${{ matrix.python-version }}
           allow-prereleases: ${{ matrix.experimental }}
 
-      - name: Set up Rye
-        uses: eifinger/setup-rye@c694239a43768373e87d0103d7f547027a23f3c8
+      - name: Set up uv
+        uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
         with:
-          version: '0.44.0'
+          version: '0.12.5'
           enable-cache: false
 
       - name: Select Python ${{ matrix.python-version }}
         run: |
-          rye toolchain register "${{ steps.setup-python.outputs.python-path }}"
-          rye pin --relaxed --no-update-requires-python "${{ matrix.python-version }}"
+          echo 'UV_PYTHON=${{ steps.setup-python.outputs.python-path }}' >> "$GITHUB_ENV"
 
       - name: Install dependencies
-        run: rye sync --all-features
+        run: ./scripts/ci-bootstrap
 
       - name: Smoke-test the supported runtime
         run: |
-          rye run python -c 'import openai; from openai import AsyncOpenAI, OpenAI'
-          rye run pytest -o addopts= --quiet \
+          .venv/bin/python -c 'import openai; from openai import AsyncOpenAI, OpenAI'
+          .venv/bin/pytest -o addopts= --quiet \
             tests/test_client.py \
             tests/test_streaming.py \
             tests/lib/test_pydantic.py
diff --git a/.github/workflows/detect-breaking-changes.yml b/.github/workflows/detect-breaking-changes.yml
index db660c03cf..e4d332ba65 100644
--- a/.github/workflows/detect-breaking-changes.yml
+++ b/.github/workflows/detect-breaking-changes.yml
@@ -39,65 +39,21 @@ jobs:
         with:
           # Ensure we can check out the pull request base in the script below.
           fetch-depth: ${{ env.FETCH_DEPTH }}
+          persist-credentials: false
 
-      - name: Set up Rye
-        uses: eifinger/setup-rye@c694239a43768373e87d0103d7f547027a23f3c8
+      - name: Set up uv
+        uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
         with:
-          version: '0.44.0'
+          version: '0.12.5'
           enable-cache: true
       - name: Install dependencies
         run: |
-          rye sync --all-features
+          ./scripts/ci-bootstrap
       - name: Detect removed symbols
         run: |
-          rye run python scripts/detect-breaking-changes.py "$BASE_SHA"
+          .venv/bin/python scripts/detect-breaking-changes.py "$BASE_SHA"
 
       - name: Detect breaking changes
         run: |
           test -f ./scripts/detect-breaking-changes || { echo "Missing scripts/detect-breaking-changes"; exit 1; }
           ./scripts/detect-breaking-changes "$BASE_SHA"
-
-  agents_sdk:
-    runs-on: 'ubuntu-latest'
-    name: Detect Agents SDK regressions
-    if: github.repository == 'openai/openai-python' && (github.event_name == 'pull_request' || (inputs.release_pr && github.ref == 'refs/heads/release-please--branches--main'))
-    steps:
-      # Setup this sdk
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
-        with:
-          path: openai-python
-
-      - name: Set up Rye
-        uses: eifinger/setup-rye@c694239a43768373e87d0103d7f547027a23f3c8
-        with:
-          version: '0.44.0'
-          enable-cache: true
-          working-directory: openai-python
-
-      - name: Install dependencies
-        working-directory: openai-python
-        run: |
-          rye sync --all-features
-
-      # Setup the agents lib
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
-        with:
-          repository: openai/openai-agents-python
-          path: openai-agents-python
-
-      - name: Setup uv
-        uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86 # v5
-        with:
-          enable-cache: true
-
-      - name: Link to local SDK
-        working-directory: openai-agents-python
-        run: uv add ../openai-python
-
-      - name: Install dependencies
-        working-directory: openai-agents-python
-        run: make sync
-
-      - name: Run integration type checks
-        working-directory: openai-agents-python
-        run: make mypy
diff --git a/noxfile.py b/noxfile.py
index 53bca7ff2a..13f6347b7a 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -1,9 +1,15 @@
+from pathlib import Path
+
 import nox
 
 
 @nox.session(reuse_venv=True, name="test-pydantic-v1")
 def test_pydantic_v1(session: nox.Session) -> None:
-    session.install("-r", "requirements-dev.lock")
+    # The CI bridge resolves a runtime-specific lock outside the source distribution.
+    requirements = Path(".venv/requirements-dev.lock")
+    if not requirements.is_file():
+        requirements = Path("requirements-dev.lock")
+    session.install("-r", str(requirements))
     session.install("pydantic<2")
 
     session.run("pytest", "--showlocals", "--ignore=tests/functional", *session.posargs)
diff --git a/scripts/ci-bootstrap b/scripts/ci-bootstrap
new file mode 100755
index 0000000000..9021d2eab8
--- /dev/null
+++ b/scripts/ci-bootstrap
@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -euo pipefail
+cd "$(dirname "$0")/.."
+
+# Bridge the old Rye baseline until the main-to-next toolchain sync.
+uv venv --allow-existing --python "${UV_PYTHON:-$(cat .python-version)}" .venv
+
+# Rye re-resolved this non-universal lock after selecting each matrix runtime.
+# Expose its dev dependency array as a uv group without changing project metadata.
+requirements_dir=$(mktemp -d)
+trap 'rm -rf "$requirements_dir"' EXIT
+{
+  printf '[dependency-groups]\n'
+  sed -n '/^dev-dependencies = \[/,/^]/p' pyproject.toml | sed '1s/dev-dependencies/dev/'
+} > "$requirements_dir/pyproject.toml"
+# Preserve the reviewed root lock and keep the CI-only lock out of distributions.
+cp requirements-dev.lock .venv/requirements-dev.lock
+# Require compatible wheels: older NumPy metadata omits its Python upper bound.
+uv pip compile pyproject.toml --all-extras --only-binary=:all: \
+  --group "$requirements_dir/pyproject.toml:dev" \
+  --python .venv/bin/python --output-file .venv/requirements-dev.lock
+printf '\n-e .\n' >> .venv/requirements-dev.lock
+uv pip sync --python .venv/bin/python .venv/requirements-dev.lock
diff --git a/scripts/lint b/scripts/lint
index 275a2bf1a1..3ecc450a22 100755
--- a/scripts/lint
+++ b/scripts/lint
@@ -6,11 +6,13 @@ cd "$(dirname "$0")/.."
 
 if [ "$1" = "--fix" ]; then
   echo "==> Running lints with --fix"
-  rye run fix:ruff
+  .venv/bin/ruff check --fix .
 else
   echo "==> Running lints"
-  rye run lint
+  .venv/bin/ruff check .
+  PATH="$PWD/.venv/bin:$PATH" ./scripts/run-pyright
+  .venv/bin/mypy .
 fi
 
 echo "==> Making sure it imports"
-rye run python -c 'import openai'
+.venv/bin/python -c 'import openai'
diff --git a/scripts/test b/scripts/test
index daff369239..342485f8ae 100755
--- a/scripts/test
+++ b/scripts/test
@@ -59,7 +59,7 @@ if [ "${OPENAI_TEST_HTTP_CLIENT:-httpx}" = "httpx2" ]; then
 fi
 
 echo "==> Running tests"
-rye run pytest "$@"
+.venv/bin/pytest "$@"
 
 echo "==> Running Pydantic v1 tests"
-rye run nox -s test-pydantic-v1 -- "$@"
+.venv/bin/nox -s test-pydantic-v1 -- "$@"