init: seed framework reference content from agent-runtimes main repo

harnesses/capabilities/python-dev/v1/harness.yaml

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+kind: capability
+name: python-dev
+version: 1
+description: "Python dev tools: pytest, ruff, mypy, uv"
+requires: []
+
+packages:
+  apt: [python3-venv]
+  pip: [pytest, ruff, mypy, hypothesis, uv]
+
+env:
+  PIP_BREAK_SYSTEM_PACKAGES: "1"
+
+network_hosts:
+  - pypi.org
+  - files.pythonhosted.org
+
+scripts:
+  init: "./init.sh"

harnesses/capabilities/python-dev/v1/init.sh

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+#!/bin/bash
+# Python development capability layer initialization script
+
+set -euo pipefail
+
+echo "Initializing python-dev capability layer..."
+
+# If pyproject.toml exists, install project in development mode
+if [[ -f "/workspace/pyproject.toml" ]]; then
+    echo "Found pyproject.toml, installing project in development mode..."
+    cd /workspace
+
+    # Create virtual environment if it doesn't exist
+    if [[ ! -d ".venv" ]]; then
+        python3 -m venv .venv
+    fi
+
+    # Activate virtual environment
+    source .venv/bin/activate
+
+    # Install project in development mode with all dependencies
+    pip install -e ".[dev,test]" 2>/dev/null || pip install -e . 2>/dev/null || {
+        echo "Could not install with extras, trying basic install..."
+        pip install -e .
+    }
+
+    echo "Project installed in development mode"
+else
+    echo "No pyproject.toml found, skipping project installation"
+fi
+
+echo "Python development environment ready"