From 7ef763d3051095d2cc3282890a8e84ba60af7b67 Mon Sep 17 00:00:00 2001
From: Dan Davison <dan.davison@temporal.io>
Date: Sun, 16 Feb 2025 14:27:52 -0500
Subject: [PATCH 01/11] Install uv

---
 .github/workflows/ci.yaml     | 1 +
 .github/workflows/python.yaml | 1 +
 2 files changed, 2 insertions(+)

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index b793aed8..27daa153 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -129,6 +129,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: '3.10'
+      - uses: astral-sh/setup-uv@v5
       - run: python -m pip install --upgrade wheel poetry poethepoet
       - run: poetry install --no-root
       - run: poe lint
diff --git a/.github/workflows/python.yaml b/.github/workflows/python.yaml
index 5adf1dab..0c676039 100644
--- a/.github/workflows/python.yaml
+++ b/.github/workflows/python.yaml
@@ -92,6 +92,7 @@ jobs:
         if: ${{ inputs.version-is-repo-ref }}
         with:
           workspaces: sdk-python/temporalio/bridge
+      - uses: astral-sh/setup-uv@v5
       - run: poetry install --no-root
         if: ${{ inputs.version-is-repo-ref }}
         working-directory: sdk-python

From 2f436aa614eb0a761b3750c21b12f211b2e5bec0 Mon Sep 17 00:00:00 2001
From: Dan Davison <dan.davison@temporal.io>
Date: Mon, 17 Feb 2025 11:16:14 -0500
Subject: [PATCH 02/11] Build wheel using uv

---
 .github/workflows/python.yaml | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/python.yaml b/.github/workflows/python.yaml
index 0c676039..272334af 100644
--- a/.github/workflows/python.yaml
+++ b/.github/workflows/python.yaml
@@ -78,7 +78,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: '3.10'
-      - run: python -m pip install --upgrade wheel poetry poethepoet
+      - run: python -m pip install poethepoet
 
       # Build SDK ==================================================
       - name: Install Protoc
@@ -93,13 +93,10 @@ jobs:
         with:
           workspaces: sdk-python/temporalio/bridge
       - uses: astral-sh/setup-uv@v5
-      - run: poetry install --no-root
+      - run: uv sync
         if: ${{ inputs.version-is-repo-ref }}
         working-directory: sdk-python
-      - run: poetry build
-        if: ${{ inputs.version-is-repo-ref }}
-        working-directory: sdk-python
-      - run: poe fix-wheel
+      - run: uv build
         if: ${{ inputs.version-is-repo-ref }}
         working-directory: sdk-python
       # ============================================================

From 2dd76bb5bdf775ec46d64b081d1cdf03372b2f6d Mon Sep 17 00:00:00 2001
From: Dan Davison <dan.davison@temporal.io>
Date: Mon, 17 Feb 2025 11:45:58 -0500
Subject: [PATCH 03/11] Use `uv tool` to install poetry and poe

---
 .github/workflows/python.yaml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/python.yaml b/.github/workflows/python.yaml
index 272334af..5cde4755 100644
--- a/.github/workflows/python.yaml
+++ b/.github/workflows/python.yaml
@@ -78,7 +78,9 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: '3.10'
-      - run: python -m pip install poethepoet
+      - uses: astral-sh/setup-uv@v5
+      - run: uv tool install poetry
+      - run: uv tool install poethepoet
 
       # Build SDK ==================================================
       - name: Install Protoc

From 956484b57cad23fe0bc718428c85e72b91d95bb3 Mon Sep 17 00:00:00 2001
From: Dan Davison <dan.davison@temporal.io>
Date: Mon, 17 Feb 2025 12:51:19 -0500
Subject: [PATCH 04/11] `uv tool install` not on PATH?

---
 .github/workflows/python.yaml | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/.github/workflows/python.yaml b/.github/workflows/python.yaml
index 5cde4755..d7fea4df 100644
--- a/.github/workflows/python.yaml
+++ b/.github/workflows/python.yaml
@@ -79,8 +79,7 @@ jobs:
         with:
           python-version: '3.10'
       - uses: astral-sh/setup-uv@v5
-      - run: uv tool install poetry
-      - run: uv tool install poethepoet
+      - run: python -m pip install poetry
 
       # Build SDK ==================================================
       - name: Install Protoc

From 8c7e1d4e0d23f85b1d92c20a9970ab1c42b1ee78 Mon Sep 17 00:00:00 2001
From: Dan Davison <dan.davison@temporal.io>
Date: Mon, 17 Feb 2025 13:52:26 -0500
Subject: [PATCH 05/11] Bump download-artifact version

---
 .github/workflows/php.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/php.yaml b/.github/workflows/php.yaml
index c9ef4a6e..cb246c72 100644
--- a/.github/workflows/php.yaml
+++ b/.github/workflows/php.yaml
@@ -38,7 +38,7 @@ jobs:
 
       - name: Download docker artifacts
         if: ${{ inputs.docker-image-artifact-name }}
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: ${{ inputs.docker-image-artifact-name }}
           path: /tmp/server-docker

From b65fc74483361bb7ab54ec8f78f9dd3bcb8aaff5 Mon Sep 17 00:00:00 2001
From: Dan Davison <dan.davison@temporal.io>
Date: Mon, 17 Feb 2025 19:19:49 -0500
Subject: [PATCH 06/11] Refactor

---
 sdkbuild/python.go | 92 +++++++++++++++++++++++++---------------------
 1 file changed, 50 insertions(+), 42 deletions(-)

diff --git a/sdkbuild/python.go b/sdkbuild/python.go
index f91087f7..a18e6ef3 100644
--- a/sdkbuild/python.go
+++ b/sdkbuild/python.go
@@ -73,50 +73,11 @@ func BuildPythonProgram(ctx context.Context, options BuildPythonProgramOptions)
 	// Use semantic version or path if it's a path
 	versionStr := strconv.Quote(strings.TrimPrefix(options.Version, "v"))
 	if strings.ContainsAny(options.Version, `/\`) {
-		// We expect a dist/ directory with a single whl file present
-		sdkPath, err := filepath.Abs(options.Version)
+		wheel, err := getWheel(ctx, options.Version)
 		if err != nil {
-			return nil, fmt.Errorf("unable to make sdk path absolute: %w", err)
-		}
-		triedBuilding := false
-
-	getWheels:
-		wheels, err := filepath.Glob(filepath.Join(sdkPath, "dist/*.whl"))
-		if err != nil {
-			return nil, fmt.Errorf("failed glob wheel lookup: %w", err)
-		} else if len(wheels) == 0 && !triedBuilding {
-			triedBuilding = true
-			// Try to build the project
-			cmd := exec.CommandContext(ctx, "poetry", "install", "--no-root")
-			cmd.Dir = sdkPath
-			cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr
-			err = cmd.Run()
-			if err != nil {
-				return nil, fmt.Errorf("problem installing deps when building sdk by path: %w", err)
-			}
-			cmd = exec.CommandContext(ctx, "poetry", "build")
-			cmd.Dir = sdkPath
-			cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr
-			err = cmd.Run()
-			if err != nil {
-				return nil, fmt.Errorf("problem buildling sdk by path: %w", err)
-			}
-			// This constitutes a legitimate use of goto, fight me.
-			goto getWheels
-		} else if len(wheels) != 1 {
-			return nil, fmt.Errorf("expected single dist wheel, found %v - consider cleaning dist dir", wheels)
-		}
-
-		absWheel, err := filepath.Abs(wheels[0])
-		if err != nil {
-			return nil, fmt.Errorf("unable to make wheel path absolute: %w", err)
-		}
-		// There's a strange bug in Poetry or somewhere deeper where, on Windows,
-		// the single drive letter has to be capitalized
-		if runtime.GOOS == "windows" && absWheel[1] == ':' {
-			absWheel = strings.ToUpper(absWheel[:1]) + absWheel[1:]
+			return nil, err
 		}
-		versionStr = "{ path = " + strconv.Quote(absWheel) + " }"
+		versionStr = "{ path = " + strconv.Quote(wheel) + " }"
 	}
 	pyProjectTOML := `
 [tool.poetry]
@@ -154,6 +115,53 @@ build-backend = "poetry.core.masonry.api"`
 	return &PythonProgram{dir}, nil
 }
 
+func getWheel(ctx context.Context, version string) (string, error) {
+	// We expect a dist/ directory with a single whl file present
+	sdkPath, err := filepath.Abs(version)
+	if err != nil {
+		return "", fmt.Errorf("unable to make sdk path absolute: %w", err)
+	}
+	triedBuilding := false
+
+getWheels:
+	wheels, err := filepath.Glob(filepath.Join(sdkPath, "dist/*.whl"))
+	if err != nil {
+		return "", fmt.Errorf("failed glob wheel lookup: %w", err)
+	} else if len(wheels) == 0 && !triedBuilding {
+		triedBuilding = true
+		// Try to build the project
+		cmd := exec.CommandContext(ctx, "poetry", "install", "--no-root")
+		cmd.Dir = sdkPath
+		cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr
+		err = cmd.Run()
+		if err != nil {
+			return "", fmt.Errorf("problem installing deps when buildling sdk by path: %w", err)
+		}
+		cmd = exec.CommandContext(ctx, "poetry", "build")
+		cmd.Dir = sdkPath
+		cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr
+		err = cmd.Run()
+		if err != nil {
+			return "", fmt.Errorf("problem buildling sdk by path: %w", err)
+		}
+		// This constitutes a legitimate use of goto, fight me.
+		goto getWheels
+	} else if len(wheels) != 1 {
+		return "", fmt.Errorf("expected single dist wheel, found %v - consider cleaning dist dir", wheels)
+	}
+
+	absWheel, err := filepath.Abs(wheels[0])
+	if err != nil {
+		return "", fmt.Errorf("unable to make wheel path absolute: %w", err)
+	}
+	// There's a strange bug in Poetry or somewhere deeper where, on Windows,
+	// the single drive letter has to be capitalized
+	if runtime.GOOS == "windows" && absWheel[1] == ':' {
+		absWheel = strings.ToUpper(absWheel[:1]) + absWheel[1:]
+	}
+	return absWheel, nil
+}
+
 // PythonProgramFromDir recreates the Python program from a Dir() result of a
 // BuildPythonProgram(). Note, the base directory of dir when it was built must
 // also be present.

From cd56a76902deb4949e9ee2f0d2f8038ac51f84fc Mon Sep 17 00:00:00 2001
From: Dan Davison <dan.davison@temporal.io>
Date: Mon, 17 Feb 2025 19:38:10 -0500
Subject: [PATCH 07/11] Remove unnecessary build-system

---
 sdkbuild/python.go | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/sdkbuild/python.go b/sdkbuild/python.go
index a18e6ef3..d72fb363 100644
--- a/sdkbuild/python.go
+++ b/sdkbuild/python.go
@@ -89,11 +89,7 @@ authors = ["Temporal Technologies Inc <sdk@temporal.io>"]
 [tool.poetry.dependencies]
 python = "^3.9"
 temporalio = ` + versionStr + `
-` + options.DependencyName + ` = { path = "../" }
-
-[build-system]
-requires = ["poetry-core>=1.0.0"]
-build-backend = "poetry.core.masonry.api"`
+` + options.DependencyName + ` = { path = "../" }`
 	if err := os.WriteFile(filepath.Join(dir, "pyproject.toml"), []byte(pyProjectTOML), 0644); err != nil {
 		return nil, fmt.Errorf("failed writing pyproject.toml: %w", err)
 	}

From e3af3ba610f2d723b6c3ea55ff3eaf775c44d577 Mon Sep 17 00:00:00 2001
From: Dan Davison <dan.davison@temporal.io>
Date: Mon, 17 Feb 2025 19:54:26 -0500
Subject: [PATCH 08/11] Migrate to uv

pyproject.toml migrated via `uvx migrate-to-uv`
---
 .github/workflows/ci.yaml     |   4 +-
 .github/workflows/python.yaml |   1 -
 README.md                     |   4 +-
 cmd/run_python.go             |   7 +-
 dockerfiles/py.Dockerfile     |  17 +-
 poetry.lock                   | 298 ----------------------------------
 pyproject.toml                |  40 +++--
 sdkbuild/python.go            |  68 ++++----
 uv.lock                       | 220 +++++++++++++++++++++++++
 9 files changed, 288 insertions(+), 371 deletions(-)
 delete mode 100644 poetry.lock
 create mode 100644 uv.lock

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 27daa153..b88aa751 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -130,8 +130,8 @@ jobs:
         with:
           python-version: '3.10'
       - uses: astral-sh/setup-uv@v5
-      - run: python -m pip install --upgrade wheel poetry poethepoet
-      - run: poetry install --no-root
+      - run: python -m pip install --upgrade wheel poethepoet
+      - run: uv sync
       - run: poe lint
 
   build-php:
diff --git a/.github/workflows/python.yaml b/.github/workflows/python.yaml
index d7fea4df..108ba7c1 100644
--- a/.github/workflows/python.yaml
+++ b/.github/workflows/python.yaml
@@ -79,7 +79,6 @@ jobs:
         with:
           python-version: '3.10'
       - uses: astral-sh/setup-uv@v5
-      - run: python -m pip install poetry
 
       # Build SDK ==================================================
       - name: Install Protoc
diff --git a/README.md b/README.md
index 6db70f62..84987e41 100644
--- a/README.md
+++ b/README.md
@@ -27,9 +27,7 @@ Prerequisites:
 - [Go](https://golang.org/) 1.17+
 - [JDK](https://adoptium.net/?variant=openjdk11&jvmVariant=hotspot) 11+
 - [Node](https://nodejs.org) 16+
-- [Python](https://www.python.org/) 3.10+
-  - [Poetry](https://python-poetry.org/): `poetry install`
-  - `setuptools`: `python -m pip install -U setuptools`
+- [uv](https://docs.astral.sh/uv/)
 - [.NET](https://dotnet.microsoft.com) 7+
 - [PHP](https://www.php.net/) 8.1+
   - [Composer](https://getcomposer.org/)
diff --git a/cmd/run_python.go b/cmd/run_python.go
index 52d840a5..0de450db 100644
--- a/cmd/run_python.go
+++ b/cmd/run_python.go
@@ -37,10 +37,9 @@ func (p *Preparer) BuildPythonProgram(ctx context.Context) (sdkbuild.Program, er
 	}
 
 	prog, err := sdkbuild.BuildPythonProgram(ctx, sdkbuild.BuildPythonProgramOptions{
-		BaseDir:        p.rootDir,
-		DirName:        p.config.DirName,
-		Version:        version,
-		DependencyName: "features",
+		BaseDir: p.rootDir,
+		DirName: p.config.DirName,
+		Version: version,
 	})
 	if err != nil {
 		return nil, fmt.Errorf("failed preparing: %w", err)
diff --git a/dockerfiles/py.Dockerfile b/dockerfiles/py.Dockerfile
index 805419d3..a3916790 100644
--- a/dockerfiles/py.Dockerfile
+++ b/dockerfiles/py.Dockerfile
@@ -18,8 +18,8 @@ RUN wget -q -O - https://sh.rustup.rs | sh -s -- -y
 
 ENV PATH="$PATH:/root/.cargo/bin"
 
-# Install poetry
-RUN pip install --no-cache-dir "poetry==1.2.2"
+# Install uv
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/
 
 WORKDIR /app
 
@@ -33,8 +33,7 @@ COPY go.mod go.sum main.go ./
 # Build the CLI
 RUN CGO_ENABLED=0 /usr/local/go/bin/go build -o temporal-features
 
-# Copy poetry config
-COPY poetry.lock pyproject.toml ./
+COPY uv.lock pyproject.toml ./
 
 ARG SDK_VERSION
 ARG SDK_REPO_URL
@@ -44,23 +43,19 @@ ARG SDK_REPO_REF
 ARG REPO_DIR_OR_PLACEHOLDER
 COPY ./${REPO_DIR_OR_PLACEHOLDER} ./${REPO_DIR_OR_PLACEHOLDER}
 
-# Prepare the feature for running. We need to use in-project venv so it is copied into smaller img.
-ENV POETRY_VIRTUALENVS_IN_PROJECT=true
+# Prepare the feature for running.
 RUN CGO_ENABLED=0 ./temporal-features prepare --lang py --dir prepared --version "$SDK_VERSION"
 
 # Copy the CLI and prepared feature to a smaller container for running
 FROM python:3.11-slim-bullseye
 
-# Poetry needed for running python tests
-RUN pip install --no-cache-dir "poetry==1.2.2"
-
 COPY --from=build /app/temporal-features /app/temporal-features
 COPY --from=build /app/features /app/features
 COPY --from=build /app/prepared /app/prepared
 COPY --from=build /app/harness/python /app/harness/python
 COPY --from=build /app/${REPO_DIR_OR_PLACEHOLDER} /app/${REPO_DIR_OR_PLACEHOLDER}
-COPY --from=build /app/poetry.lock /app/pyproject.toml /app/
+COPY --from=build /app/uv.lock /app/pyproject.toml /app/
+COPY --from=build /bin/uv /bin/uvx /bin/
 
 # Use entrypoint instead of command to "bake" the default command options
-ENV POETRY_VIRTUALENVS_IN_PROJECT=true
 ENTRYPOINT ["/app/temporal-features", "run", "--lang", "py", "--prepared-dir", "prepared"]
diff --git a/poetry.lock b/poetry.lock
deleted file mode 100644
index e5947dec..00000000
--- a/poetry.lock
+++ /dev/null
@@ -1,298 +0,0 @@
-# This file is automatically @generated by Poetry 2.0.1 and should not be changed by hand.
-
-[[package]]
-name = "black"
-version = "22.8.0"
-description = "The uncompromising code formatter."
-optional = false
-python-versions = ">=3.6.2"
-groups = ["dev"]
-files = [
-    {file = "black-22.8.0-cp310-cp310-macosx_10_9_universal2.whl", hash = "sha256:ce957f1d6b78a8a231b18e0dd2d94a33d2ba738cd88a7fe64f53f659eea49fdd"},
-    {file = "black-22.8.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:5107ea36b2b61917956d018bd25129baf9ad1125e39324a9b18248d362156a27"},
-    {file = "black-22.8.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:e8166b7bfe5dcb56d325385bd1d1e0f635f24aae14b3ae437102dedc0c186747"},
-    {file = "black-22.8.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:dd82842bb272297503cbec1a2600b6bfb338dae017186f8f215c8958f8acf869"},
-    {file = "black-22.8.0-cp310-cp310-win_amd64.whl", hash = "sha256:d839150f61d09e7217f52917259831fe2b689f5c8e5e32611736351b89bb2a90"},
-    {file = "black-22.8.0-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:a05da0430bd5ced89176db098567973be52ce175a55677436a271102d7eaa3fe"},
-    {file = "black-22.8.0-cp36-cp36m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:4a098a69a02596e1f2a58a2a1c8d5a05d5a74461af552b371e82f9fa4ada8342"},
-    {file = "black-22.8.0-cp36-cp36m-win_amd64.whl", hash = "sha256:5594efbdc35426e35a7defa1ea1a1cb97c7dbd34c0e49af7fb593a36bd45edab"},
-    {file = "black-22.8.0-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:a983526af1bea1e4cf6768e649990f28ee4f4137266921c2c3cee8116ae42ec3"},
-    {file = "black-22.8.0-cp37-cp37m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:3b2c25f8dea5e8444bdc6788a2f543e1fb01494e144480bc17f806178378005e"},
-    {file = "black-22.8.0-cp37-cp37m-win_amd64.whl", hash = "sha256:78dd85caaab7c3153054756b9fe8c611efa63d9e7aecfa33e533060cb14b6d16"},
-    {file = "black-22.8.0-cp38-cp38-macosx_10_9_universal2.whl", hash = "sha256:cea1b2542d4e2c02c332e83150e41e3ca80dc0fb8de20df3c5e98e242156222c"},
-    {file = "black-22.8.0-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:5b879eb439094751185d1cfdca43023bc6786bd3c60372462b6f051efa6281a5"},
-    {file = "black-22.8.0-cp38-cp38-macosx_11_0_arm64.whl", hash = "sha256:0a12e4e1353819af41df998b02c6742643cfef58282915f781d0e4dd7a200411"},
-    {file = "black-22.8.0-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:c3a73f66b6d5ba7288cd5d6dad9b4c9b43f4e8a4b789a94bf5abfb878c663eb3"},
-    {file = "black-22.8.0-cp38-cp38-win_amd64.whl", hash = "sha256:e981e20ec152dfb3e77418fb616077937378b322d7b26aa1ff87717fb18b4875"},
-    {file = "black-22.8.0-cp39-cp39-macosx_10_9_universal2.whl", hash = "sha256:8ce13ffed7e66dda0da3e0b2eb1bdfc83f5812f66e09aca2b0978593ed636b6c"},
-    {file = "black-22.8.0-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:32a4b17f644fc288c6ee2bafdf5e3b045f4eff84693ac069d87b1a347d861497"},
-    {file = "black-22.8.0-cp39-cp39-macosx_11_0_arm64.whl", hash = "sha256:0ad827325a3a634bae88ae7747db1a395d5ee02cf05d9aa7a9bd77dfb10e940c"},
-    {file = "black-22.8.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:53198e28a1fb865e9fe97f88220da2e44df6da82b18833b588b1883b16bb5d41"},
-    {file = "black-22.8.0-cp39-cp39-win_amd64.whl", hash = "sha256:bc4d4123830a2d190e9cc42a2e43570f82ace35c3aeb26a512a2102bce5af7ec"},
-    {file = "black-22.8.0-py3-none-any.whl", hash = "sha256:d2c21d439b2baf7aa80d6dd4e3659259be64c6f49dfd0f32091063db0e006db4"},
-    {file = "black-22.8.0.tar.gz", hash = "sha256:792f7eb540ba9a17e8656538701d3eb1afcb134e3b45b71f20b25c77a8db7e6e"},
-]
-
-[package.dependencies]
-click = ">=8.0.0"
-mypy-extensions = ">=0.4.3"
-pathspec = ">=0.9.0"
-platformdirs = ">=2"
-tomli = {version = ">=1.1.0", markers = "python_full_version < \"3.11.0a7\""}
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-types-protobuf = ">=3.20"
-typing-extensions = ">=4.2.0,<5.0.0"
-
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-optional = false
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-
-[metadata]
-lock-version = "2.1"
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diff --git a/pyproject.toml b/pyproject.toml
index 864bc9f8..4e8b9973 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,22 +1,34 @@
-[tool.poetry]
+[project]
 name = "features"
 version = "0.1.0"
 description = "Temporal SDK Features"
+authors = [{ name = "Temporal Technologies Inc", email = "sdk@temporal.io" }]
+requires-python = "~=3.9"
 license = "MIT"
-authors = ["Temporal Technologies Inc <sdk@temporal.io>"]
-packages = [
-  { include = "features" },
-  { include = "harness/python/**/*.py" },
+dependencies = ["temporalio>=1.9.0,<2"]
+
+[dependency-groups]
+dev = [
+    "mypy>=0.961,<0.962",
+    "black>=22.3.0,<23",
+    "isort>=5.10.1,<6",
 ]
 
-[tool.poetry.dependencies]
-python = "^3.9"
-temporalio = "^1.9.0"
+[tool.hatch.build.targets.sdist]
+include = [
+    "features",
+    "harness/python/**/*.py",
+]
 
-[tool.poetry.dev-dependencies]
-mypy = "^0.961"
-black = "^22.3.0"
-isort = "^5.10.1"
+[tool.hatch.build.targets.wheel]
+include = [
+    "features",
+    "harness/python/**/*.py",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
 [tool.poe.tasks]
 format = [{cmd = "black ."}, {cmd = "isort ."}]
@@ -30,7 +42,3 @@ lint-types = "mypy --explicit-package-bases --namespace-packages ."
 [tool.isort]
 profile = "black"
 skip_gitignore = true
-
-[build-system]
-requires = ["poetry-core>=1.0.0"]
-build-backend = "poetry.core.masonry.api"
diff --git a/sdkbuild/python.go b/sdkbuild/python.go
index d72fb363..04e216f5 100644
--- a/sdkbuild/python.go
+++ b/sdkbuild/python.go
@@ -7,7 +7,6 @@ import (
 	"os/exec"
 	"path/filepath"
 	"runtime"
-	"strconv"
 	"strings"
 )
 
@@ -20,8 +19,6 @@ type BuildPythonProgramOptions struct {
 	// a single wheel in the dist directory. Otherwise it is a specific version
 	// (with leading "v" is trimmed if present).
 	Version string
-	// Required Poetry dependency name of BaseDir.
-	DependencyName string
 	// If present, this directory is expected to exist beneath base dir. Otherwise
 	// a temporary dir is created.
 	DirName string
@@ -47,8 +44,6 @@ func BuildPythonProgram(ctx context.Context, options BuildPythonProgramOptions)
 		return nil, fmt.Errorf("version required")
 	} else if _, err := os.Stat(filepath.Join(options.BaseDir, "pyproject.toml")); err != nil {
 		return nil, fmt.Errorf("failed finding pyproject.toml in base dir: %w", err)
-	} else if options.DependencyName == "" {
-		return nil, fmt.Errorf("dependency name required")
 	}
 
 	// Create temp dir if needed that we will remove if creating is unsuccessful
@@ -70,40 +65,44 @@ func BuildPythonProgram(ctx context.Context, options BuildPythonProgramOptions)
 		}()
 	}
 
-	// Use semantic version or path if it's a path
-	versionStr := strconv.Quote(strings.TrimPrefix(options.Version, "v"))
-	if strings.ContainsAny(options.Version, `/\`) {
-		wheel, err := getWheel(ctx, options.Version)
-		if err != nil {
-			return nil, err
+	executeCommand := func(name string, args ...string) error {
+		cmd := exec.CommandContext(ctx, name, args...)
+		cmd.Dir = dir
+		cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr
+		if options.ApplyToCommand != nil {
+			if err := options.ApplyToCommand(ctx, cmd); err != nil {
+				return err
+			}
 		}
-		versionStr = "{ path = " + strconv.Quote(wheel) + " }"
+		return cmd.Run()
 	}
+
 	pyProjectTOML := `
-[tool.poetry]
+[project]
 name = "python-program-` + filepath.Base(dir) + `"
 version = "0.1.0"
 description = "Temporal SDK Python Test"
-authors = ["Temporal Technologies Inc <sdk@temporal.io>"]
-
-[tool.poetry.dependencies]
-python = "^3.9"
-temporalio = ` + versionStr + `
-` + options.DependencyName + ` = { path = "../" }`
+authors = [{ name = "Temporal Technologies Inc", email = "sdk@temporal.io" }]
+requires-python = "~=3.9"
+`
 	if err := os.WriteFile(filepath.Join(dir, "pyproject.toml"), []byte(pyProjectTOML), 0644); err != nil {
 		return nil, fmt.Errorf("failed writing pyproject.toml: %w", err)
 	}
 
-	// Install
-	cmd := exec.CommandContext(ctx, "poetry", "install", "--no-root", "-v")
-	cmd.Dir = dir
-	cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr
-	if options.ApplyToCommand != nil {
-		if err := options.ApplyToCommand(ctx, cmd); err != nil {
+	if strings.ContainsAny(options.Version, `/\`) {
+		// It's a path; install from wheel
+		wheel, err := getWheel(ctx, options.Version)
+		if err != nil {
 			return nil, err
 		}
+		executeCommand("uv", "add", wheel)
+	} else {
+		executeCommand("uv", "add", fmt.Sprintf("temporalio==%s", strings.TrimPrefix(options.Version, "v")))
 	}
-	if err := cmd.Run(); err != nil {
+	// Add the `features` python package
+	executeCommand("uv", "add", "--editable", "../")
+
+	if err := executeCommand("uv", "sync"); err != nil {
 		return nil, fmt.Errorf("failed installing: %w", err)
 	}
 
@@ -126,21 +125,18 @@ getWheels:
 	} else if len(wheels) == 0 && !triedBuilding {
 		triedBuilding = true
 		// Try to build the project
-		cmd := exec.CommandContext(ctx, "poetry", "install", "--no-root")
+		cmd := exec.CommandContext(ctx, "uv", "sync")
 		cmd.Dir = sdkPath
 		cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr
-		err = cmd.Run()
-		if err != nil {
-			return "", fmt.Errorf("problem installing deps when buildling sdk by path: %w", err)
+		if err := cmd.Run(); err != nil {
+			return "", fmt.Errorf("problem installing deps when building sdk by path: %w", err)
 		}
-		cmd = exec.CommandContext(ctx, "poetry", "build")
+		cmd = exec.CommandContext(ctx, "uv", "build")
 		cmd.Dir = sdkPath
 		cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr
-		err = cmd.Run()
-		if err != nil {
-			return "", fmt.Errorf("problem buildling sdk by path: %w", err)
+		if err := cmd.Run(); err != nil {
+			return "", fmt.Errorf("problem building sdk by path: %w", err)
 		}
-		// This constitutes a legitimate use of goto, fight me.
 		goto getWheels
 	} else if len(wheels) != 1 {
 		return "", fmt.Errorf("expected single dist wheel, found %v - consider cleaning dist dir", wheels)
@@ -178,7 +174,7 @@ func (p *PythonProgram) Dir() string { return p.dir }
 // name of the module.
 func (p *PythonProgram) NewCommand(ctx context.Context, args ...string) (*exec.Cmd, error) {
 	args = append([]string{"run", "python", "-m"}, args...)
-	cmd := exec.CommandContext(ctx, "poetry", args...)
+	cmd := exec.CommandContext(ctx, "uv", args...)
 	cmd.Dir = p.dir
 	cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr
 	return cmd, nil
diff --git a/uv.lock b/uv.lock
new file mode 100644
index 00000000..1da2bcb1
--- /dev/null
+++ b/uv.lock
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+    { name = "platformdirs" },
+    { name = "tomli", marker = "python_full_version < '3.11'" },
+    { name = "typing-extensions", marker = "python_full_version < '3.10'" },
+]
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From 18f0e9cd19952a64fa6ac8059ebb9c9228104804 Mon Sep 17 00:00:00 2001
From: Dan Davison <dan.davison@temporal.io>
Date: Mon, 17 Feb 2025 21:40:03 -0500
Subject: [PATCH 09/11] Use ruff instead of black and isort

---
 .../feature.py                                |   6 +-
 .../data_converter/binary_protobuf/feature.py |   1 +
 features/data_converter/codec/feature.py      |   1 +
 features/data_converter/json/feature.py       |   1 +
 .../data_converter/json_protobuf/feature.py   |   1 +
 harness/python/util.py                        |   6 +-
 pyproject.toml                                |  13 +--
 uv.lock                                       | 106 +++++-------------
 8 files changed, 41 insertions(+), 94 deletions(-)

diff --git a/features/continue_as_new/updates_do_not_block_continue_as_new/feature.py b/features/continue_as_new/updates_do_not_block_continue_as_new/feature.py
index cd607086..ac48af9f 100644
--- a/features/continue_as_new/updates_do_not_block_continue_as_new/feature.py
+++ b/features/continue_as_new/updates_do_not_block_continue_as_new/feature.py
@@ -110,9 +110,9 @@ async def get_event_types(run_id: str) -> set[EventType.ValueType]:
         update_event_types & await get_event_types(handle.first_execution_run_id)
     ), "Update should not appear in pre-CAN history"
 
-    assert update_event_types <= await get_event_types(
-        update_run_id
-    ), "Update events should appear in post-CAN history"
+    assert update_event_types <= await get_event_types(update_run_id), (
+        "Update events should appear in post-CAN history"
+    )
 
 
 register_feature(
diff --git a/features/data_converter/binary_protobuf/feature.py b/features/data_converter/binary_protobuf/feature.py
index c6397b77..25d73685 100644
--- a/features/data_converter/binary_protobuf/feature.py
+++ b/features/data_converter/binary_protobuf/feature.py
@@ -19,6 +19,7 @@
 
 EXPECTED_RESULT = DataBlob(data=bytes.fromhex("deadbeef"))
 
+
 # An echo workflow
 @workflow.defn
 class Workflow:
diff --git a/features/data_converter/codec/feature.py b/features/data_converter/codec/feature.py
index 0e8d4678..c17c86c6 100644
--- a/features/data_converter/codec/feature.py
+++ b/features/data_converter/codec/feature.py
@@ -21,6 +21,7 @@
 
 CODEC_ENCODING = "my_encoding"
 
+
 # An echo workflow
 @workflow.defn
 class Workflow:
diff --git a/features/data_converter/json/feature.py b/features/data_converter/json/feature.py
index 002cbd33..6b734e2e 100644
--- a/features/data_converter/json/feature.py
+++ b/features/data_converter/json/feature.py
@@ -15,6 +15,7 @@
 
 EXPECTED_RESULT: Result = {"spec": True}
 
+
 # An echo workflow
 @workflow.defn
 class Workflow:
diff --git a/features/data_converter/json_protobuf/feature.py b/features/data_converter/json_protobuf/feature.py
index cbfb060a..d2d28e85 100644
--- a/features/data_converter/json_protobuf/feature.py
+++ b/features/data_converter/json_protobuf/feature.py
@@ -13,6 +13,7 @@
 EXPECTED_RESULT = DataBlob(data=bytes.fromhex("deadbeef"))
 JSONP_decoder = JSONProtoPayloadConverter()
 
+
 # An echo workflow
 @workflow.defn
 class Workflow:
diff --git a/harness/python/util.py b/harness/python/util.py
index 2118e679..51dad340 100644
--- a/harness/python/util.py
+++ b/harness/python/util.py
@@ -71,6 +71,6 @@ async def assert_eq_eventually(
         if expected == last_value:
             return
         await asyncio.sleep(interval.total_seconds())
-    assert (
-        expected == last_value
-    ), f"timed out waiting for equal, asserted against last value of {last_value}"
+    assert expected == last_value, (
+        f"timed out waiting for equal, asserted against last value of {last_value}"
+    )
diff --git a/pyproject.toml b/pyproject.toml
index 4e8b9973..aef040fa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,8 +10,7 @@ dependencies = ["temporalio>=1.9.0,<2"]
 [dependency-groups]
 dev = [
     "mypy>=0.961,<0.962",
-    "black>=22.3.0,<23",
-    "isort>=5.10.1,<6",
+    "ruff>=0.9.6",
 ]
 
 [tool.hatch.build.targets.sdist]
@@ -31,14 +30,10 @@ requires = ["hatchling"]
 build-backend = "hatchling.build"
 
 [tool.poe.tasks]
-format = [{cmd = "black ."}, {cmd = "isort ."}]
+format = [{cmd = "uv run ruff check --select I --fix"}, {cmd = "uv run ruff format"}, ]
 lint = [
-  {cmd = "black --check ."},
-  {cmd = "isort --check-only ."},
+  {cmd = "uv run ruff check --select I"},
+  {cmd = "uv run ruff format --check"},
   {ref = "lint-types"},
 ]
 lint-types = "mypy --explicit-package-bases --namespace-packages ."
-
-[tool.isort]
-profile = "black"
-skip_gitignore = true
diff --git a/uv.lock b/uv.lock
index 1da2bcb1..fae37d23 100644
--- a/uv.lock
+++ b/uv.lock
@@ -2,54 +2,6 @@ version = 1
 revision = 1
 requires-python = ">=3.9, <4"
 
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-
 [[package]]
 name = "features"
 version = "0.1.0"
@@ -60,9 +12,8 @@ dependencies = [
 
 [package.dev-dependencies]
 dev = [
-    { name = "black" },
-    { name = "isort" },
     { name = "mypy" },
+    { name = "ruff" },
 ]
 
 [package.metadata]
@@ -70,18 +21,8 @@ requires-dist = [{ name = "temporalio", specifier = ">=1.9.0,<2" }]
 
 [package.metadata.requires-dev]
 dev = [
-    { name = "black", specifier = ">=22.3.0,<23" },
-    { name = "isort", specifier = ">=5.10.1,<6" },
     { name = "mypy", specifier = ">=0.961,<0.962" },
-]
-
-[[package]]
-name = "isort"
-version = "5.10.1"
-source = { registry = "https://pypi.org/simple" }
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+    { name = "ruff", specifier = ">=0.9.6" },
 ]
 
 [[package]]
@@ -117,24 +58,6 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/5c/eb/975c7c080f3223a5cdaff09612f3a5221e4ba534f7039db34c35d95fa6a5/mypy_extensions-0.4.3-py2.py3-none-any.whl", hash = "sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d", size = 4470 },
 ]
 
-[[package]]
-name = "pathspec"
-version = "0.10.1"
-source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/24/9f/a9ae1e6efa11992dba2c4727d94602bd2f6ee5f0dedc29ee2d5d572c20f7/pathspec-0.10.1.tar.gz", hash = "sha256:7ace6161b621d31e7902eb6b5ae148d12cfd23f4a249b9ffb6b9fee12084323d", size = 43155 }
-wheels = [
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-]
-
-[[package]]
-name = "platformdirs"
-version = "2.5.2"
-source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/ff/7b/3613df51e6afbf2306fc2465671c03390229b55e3ef3ab9dd3f846a53be6/platformdirs-2.5.2.tar.gz", hash = "sha256:58c8abb07dcb441e6ee4b11d8df0ac856038f944ab98b7be6b27b2a3c7feef19", size = 22529 }
-wheels = [
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-
 [[package]]
 name = "protobuf"
 version = "4.21.6"
@@ -164,6 +87,31 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/36/7a/87837f39d0296e723bb9b62bbb257d0355c7f6128853c78955f57342a56d/python_dateutil-2.8.2-py2.py3-none-any.whl", hash = "sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9", size = 247702 },
 ]
 
+[[package]]
+name = "ruff"
+version = "0.9.6"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/2a/e1/e265aba384343dd8ddd3083f5e33536cd17e1566c41453a5517b5dd443be/ruff-0.9.6.tar.gz", hash = "sha256:81761592f72b620ec8fa1068a6fd00e98a5ebee342a3642efd84454f3031dca9", size = 3639454 }
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 name = "six"
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From d184c3ce52e366572871a2886ec90366ad87ceab Mon Sep 17 00:00:00 2001
From: Dan Davison <dan.davison@temporal.io>
Date: Mon, 17 Feb 2025 22:18:34 -0500
Subject: [PATCH 10/11] wheel package not needed

---
 .github/workflows/ci.yaml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index b88aa751..dcb17e21 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -130,7 +130,8 @@ jobs:
         with:
           python-version: '3.10'
       - uses: astral-sh/setup-uv@v5
-      - run: python -m pip install --upgrade wheel poethepoet
+      # TODO: `uv tool install poethepoet` preferable but didn't seem to be installing into PATH
+      - run: python -m pip install poethepoet
       - run: uv sync
       - run: poe lint
 

From fa70ddb817455a72088b4a0ffd8b29a15d08a0f0 Mon Sep 17 00:00:00 2001
From: Dan Davison <dan.davison@temporal.io>
Date: Mon, 17 Feb 2025 22:19:10 -0500
Subject: [PATCH 11/11] install poe with uv tool

---
 .github/workflows/ci.yaml | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index dcb17e21..fc9f8f53 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -130,8 +130,7 @@ jobs:
         with:
           python-version: '3.10'
       - uses: astral-sh/setup-uv@v5
-      # TODO: `uv tool install poethepoet` preferable but didn't seem to be installing into PATH
-      - run: python -m pip install poethepoet
+      - run: uv tool install poethepoet
       - run: uv sync
       - run: poe lint