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+## Purpose
+
+Define the supported Python interpreter version range for the project workspace, container images, and CI pipeline, ensuring all environments converge on a single Python baseline.
+
+## Requirements
+
+### Requirement: Workspace-wide supported Python version
+The system SHALL declare a single, consistent supported Python interpreter version range across the `uv` workspace root and every workspace member (`apps/device-host-agent`, `apps/cloud-api`, `packages/cloud-platform`), such that the range admits Python 3.13 and excludes Python 3.14, so that `paddlepaddle` (which has no Python 3.14 wheel available on PyPI) can be installed in every environment that follows the project's documented setup.
+
+#### Scenario: Workspace resolves and syncs on Python 3.13
+- **WHEN** an operator runs `uv python install 3.13` followed by `uv sync --locked --all-packages` in the repository root
+- **THEN** the sync succeeds and provisions a `.venv` using a Python 3.13 interpreter, with `uv.lock` resolved against that interpreter
+
+#### Scenario: A Python 3.14 interpreter is rejected
+- **WHEN** `uv` attempts to resolve or sync the workspace against a Python 3.14 interpreter
+- **THEN** `uv` reports the interpreter as incompatible with the declared `requires-python` range, rather than silently proceeding
+
+### Requirement: Container and CI images match the declared Python baseline
+The system SHALL build its Docker image and Jenkins CI pipeline using a base image whose Python version matches the workspace's declared `requires-python` range, so that containerized and CI environments never diverge from what local development targets.
+
+#### Scenario: Docker image build uses the supported Python version
+- **WHEN** the project's `Dockerfile` is built
+- **THEN** the resulting image's base image is `astral-sh/uv:python3.13-bookworm-slim`
+
+#### Scenario: CI pipeline uses the supported Python version
+- **WHEN** the Jenkins pipeline defined in `Jenkinsfile` executes
+- **THEN** it runs inside the `astral-sh/uv:python3.13-bookworm-slim` image