Refactor MCP streamable HTTP helper to use native transports

[willccbb]

Summary

• replace the custom stdio bridge with a generic streamable HTTP helper that configures native MCP endpoints using placeholder-aware launch arguments
• document how to spin up or connect to StreamableHTTP servers following the official MCP guidance and point to a real remote provider example
• drop bridge-only dependencies now that the environment no longer vendors an HTTP proxy

Testing

• python -m compileall environments/mcp_env/src
• python - <<'PY' import sys from pathlib import Path sys.path.append(str(Path('environments/mcp_env').resolve()))

from mcp_env import build_streamable_http_server_config

config = build_streamable_http_server_config( name="demo", command="uv", args=["run", "script.py", "--", "--port", "{port}", "--host", "{host}", "--url", "{url}"], ) print(config["url"]) print(config["args"]) PY

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https://chatgpt.com/codex/tasks/task_e_68cd8600593c83268b073194eef6feb2