Add RFC for Qwen-Code CLI Output Formats and IPC Stream JSON Capability

.gitignore

@@ -48,4 +48,221 @@ logs/
 # GHA credentials
 gha-creds-*.json
 
-QWEN.md
+QWEN.md
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[codz]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#   Usually these files are written by a python script from a template
+#   before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py.cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
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+local_settings.py
+db.sqlite3
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+# Sphinx documentation
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+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
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+# Pipfile.lock
+
+# UV
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+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+# uv.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+# poetry.lock
+# poetry.toml
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#   pdm recommends including project-wide configuration in pdm.toml, but excluding .pdm-python.
+#   https://pdm-project.org/en/latest/usage/project/#working-with-version-control
+# pdm.lock
+# pdm.toml
+.pdm-python
+.pdm-build/
+
+# pixi
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+# pixi.lock
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+#   in the .venv directory. It is recommended not to include this directory in version control.
+.pixi
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# Redis
+*.rdb
+*.aof
+*.pid
+
+# RabbitMQ
+mnesia/
+rabbitmq/
+rabbitmq-data/
+
+# ActiveMQ
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+
+# SageMath parsed files
+*.sage.py
+
+# Environments
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+ENV/
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+
+# Spyder project settings
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+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#   JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#   be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
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+# .idea/
+
+# Abstra
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+#   Learn more at https://abstra.io/docs
+.abstra/
+
+# Visual Studio Code
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+#   that can be found at https://github.com/github/gitignore/blob/main/Global/VisualStudioCode.gitignore
+#   and can be added to the global gitignore or merged into this file. However, if you prefer, 
+#   you could uncomment the following to ignore the entire vscode folder
+# .vscode/
+
+# Ruff stuff:
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+
+# PyPI configuration file
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+
+# Marimo
+marimo/_static/
+marimo/_lsp/
+__marimo__/
+
+# Streamlit
+.streamlit/secrets.toml

docs/cli/index.md

@@ -27,3 +27,42 @@ Qwen Code executes the command and prints the output to your terminal. Note that
 ```bash
 qwen -p "What is fine tuning?"
 ```
+
+### Structured stream-json mode
+
+For programmatic integrations, Qwen Code supports structured JSON Lines input and output:
+
+- `--output-format stream-json` switches stdout to emit Claude-compatible envelopes (`user`, `assistant`, `result`, etc.).
+- `--input-format stream-json` lets you pipe newline-delimited JSON requests into stdin (e.g., control requests and user messages).
+- `--include-partial-messages` enables incremental `stream_event` deltas alongside the final assistant message.
+
+Example one-shot invocation:
+
+```bash
+echo '{"type":"user","message":{"content":"List supported flags"}}' \
+  | qwen --input-format stream-json --output-format stream-json
+```
+
+When run in this mode, every stdout line is a standalone JSON object you can parse reliably. Control responses (for example, acknowledging `control_request.initialize`) are also written using the same envelope schema.
+
+To keep a session open for multiple messages, omit `--prompt` and keep stdin open (for example, by running the CLI directly and typing JSON lines):
+
+```bash
+npm run stream-json-session
+```
+
+The process will remain active until EOF (`Ctrl+D`) or an explicit `control_request.interrupt`, making it suitable for SDK transports that maintain a persistent subprocess connection.
+
+The repository also provides a minimal Python client sample at
+`docs/examples/stream-json/simple_stream_json_client.py`. The script is adapted
+from `third-party/anthropics/claude-agent-sdk-python/examples/quick_start.py`
+and illustrates how to drive the session lifecycle with `control_request`, while
+showcasing a short multi-turn exchange (sending several `user` messages in a
+row):
+
+```bash
+python docs/examples/stream-json/simple_stream_json_client.py
+```
+
+Each log entry is separated with `------` and prefixed with `[client]` or `[cli]`
+to make debugging the JSON stream easier.