feat(SDK) Add Python SDK implementation for #3010 (#3494)

* Codex worktree snapshot: startup-cleanup

Co-authored-by: Codex

* Add Python SDK real smoke test

Adds a repository-only real E2E smoke script for the Python SDK, plus npm and developer documentation entry points.

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

* fix(sdk-python): address review findings — bugs, type safety, and test coverage

- Fix prepare_spawn_info: JS files now use "node" instead of sys.executable
- Fix protocol.py: correct total=False misuse on 7 TypedDicts (required fields were optional)
- Fix query.py: add _closed guard in _ensure_started, suppress exceptions in close()
- Fix sync_query.py: prevent close() deadlock, add context manager, add timeouts
- Fix transport.py: handle malformed JSON lines, add _closed guard in start()
- Fix validation.py: use uuid.RFC_4122 instead of magic UUID
- Fix __init__.py: export TextBlock, widen query_sync signature
- Remove dead code: ensure_not_aborted, write_json_line, _thread_error
- Add 12 new tests (29 → 41): context managers, JSON skip, closed guards, spawn info, timeouts

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

* fix(sdk-python): address wenshao review — session_id, bool validation, debug stderr

- Fix continue_session=True generating a wrong random session_id
- Add _as_optional_bool helper for strict type validation on bool fields
- Default debug stderr to sys.stderr when no custom callback is provided

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

* fix(sdk-python): address remaining wenshao review feedback

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

* test(cli): harden settings dialog restart prompt test

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

* fix(sdk-python): review fixes — UUID compat, stderr fallback, sync cleanup

- Remove UUID version restriction to support v6/v7/v8 (RFC 9562)
- Always write to sys.stderr when stderr callback raises (was silent when debug=False)
- Prevent duplicate _STOP sentinel in SyncQuery.close() via _stop_sent flag
- Add ruff format --check to CI workflow
- Fix smoke_real.py version guard: fail early before imports instead of NameError
- Apply ruff format to existing files

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

* fix(sdk-python): remaining review fixes — exit_code attr, guard strictness, sync timeout

- Add exit_code attribute to ProcessExitError for programmatic access
- Strengthen is_control_response/is_control_cancel guards to require
  payload fields, preventing misrouting of malformed messages
- Expose control_request_timeout property on Query so SyncQuery uses
  the configured timeout instead of a hardcoded 30s default
- Use dataclasses.replace() instead of direct mutation on frozen-style
  QueryOptions in query() factory
- Add ResourceWarning in SyncQuery.__del__ when not properly closed

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

* fix(sdk-python): add exit_code default and guard __del__ against partial GC

- Give ProcessExitError.exit_code a default value (-1) so user code can
  construct the exception with just a message string
- Wrap SyncQuery.__del__ in try/except AttributeError to prevent crashes
  when the object is partially garbage-collected

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

* fix(sdk-python): review fixes — resource leak, type safety, CI matrix, docs

- Fix SyncQuery.__del__ to call close() on GC instead of only warning
- Replace hasattr duck-type check with isinstance(prompt, AsyncIterable)
- Type-validate permission_mode/auth_type in QueryOptions.from_mapping
- Use TypeGuard return types on all is_sdk_*/is_control_* predicates
- Add 5s margin to sync wrapper timeouts to prevent error type masking
- Expand CI matrix to test Python 3.10, 3.11, 3.12
- Change ProcessExitError.exit_code default from -1 to None
- Add stderr to docs QueryOptions listing
- Update README sync example to use context manager pattern

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

* fix(sdk-python): preserve iterator exhaustion state and suppress detached task warning

- Add _exhausted flag to Query.__anext__ and SyncQuery.__next__ so
  repeated iteration after end-of-stream raises Stop(Async)Iteration
  instead of blocking forever.
- Remove re-raise in _initialize() to prevent asyncio
  "Task exception was never retrieved" warning on detached tasks;
  the error is already surfaced via _finish_with_error().

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

* fix(sdk-python): reject mcp_servers at validation time and add iterator/init tests

- Reject mcp_servers in validate_query_options() with a clear error
  instead of advertising MCP support to the CLI and then failing at
  runtime when mcp_message arrives.
- Remove dead mcp_servers branch from _initialize().
- Add tests for async/sync iterator exhaustion, detached init task
  warning suppression, and mcp_servers validation.

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

* fix(sdk-python): fix ruff lint errors in new tests

- Use ControlRequestTimeoutError instead of bare Exception (B017)
- Fix import sorting for stdlib vs third-party (I001)
- Break long line to stay within 88-char limit (E501)

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

* style(sdk-python): apply ruff format to new tests

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

---------

Co-authored-by: jinye.djy <jinye.djy@alibaba-inc.com>
Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

.github/workflows/sdk-python.yml

@@ -0,0 +1,59 @@
+name: 'SDK Python'
+
+on:
+  pull_request:
+    branches:
+      - 'main'
+      - 'release/**'
+    paths:
+      - 'packages/sdk-python/**'
+      - 'docs/developers/sdk-python.md'
+      - 'docs/developers/_meta.ts'
+      - 'README.md'
+      - 'package.json'
+      - '.github/workflows/sdk-python.yml'
+  push:
+    branches:
+      - 'main'
+      - 'release/**'
+    paths:
+      - 'packages/sdk-python/**'
+      - 'docs/developers/sdk-python.md'
+      - 'docs/developers/_meta.ts'
+      - 'README.md'
+      - 'package.json'
+      - '.github/workflows/sdk-python.yml'
+
+jobs:
+  sdk-python:
+    name: 'SDK Python (${{ matrix.python-version }})'
+    runs-on: 'ubuntu-latest'
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.10', '3.11', '3.12']
+    steps:
+      - name: 'Checkout'
+        uses: 'actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8' # ratchet:actions/checkout@v5
+
+      - name: 'Set up Python'
+        uses: 'actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065' # ratchet:actions/setup-python@v5
+        with:
+          python-version: '${{ matrix.python-version }}'
+
+      - name: 'Install SDK test dependencies'
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -e 'packages/sdk-python[dev]'
+
+      - name: 'Run Ruff'
+        run: 'python -m ruff check --config packages/sdk-python/pyproject.toml packages/sdk-python'
+
+      - name: 'Run Ruff Format'
+        run: 'python -m ruff format --check --config packages/sdk-python/pyproject.toml packages/sdk-python'
+
+      - name: 'Run Mypy'
+        run: 'python -m mypy --config-file packages/sdk-python/pyproject.toml packages/sdk-python/src'
+
+      - name: 'Run Pytest'
+        run: 'python -m pytest -c packages/sdk-python/pyproject.toml packages/sdk-python/tests -q'