feat(console): add themed Rich console

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: olivermeyer

pyproject.toml

@@ -51,6 +51,7 @@ requires-python = ">=3.11, <3.15"
 
 dependencies = [
     "pydantic>=2,<3",
+    "rich>=14,<15",
 ]
 
 [dependency-groups]

src/aignostics_foundry_core/AGENTS.md

@@ -8,12 +8,26 @@ This file provides an overview of all modules in `aignostics_foundry_core`, thei
 
 | Module | Purpose | Description |
 |--------|---------|-------------|
+| **console** | Themed terminal output | Module-level `console` object (Rich `Console`) with colour theme and `_get_console()` factory |
 | **health** | Service health checks | `Health` model and `HealthStatus` enum for tree-structured health status |
 
 ## Module Descriptions
 
 <!-- For each module, document its purpose, features, dependencies, and usage. -->
 
+### console
+
+**Themed Rich console for structured terminal output**
+
+- **Purpose**: Provides a module-level `console` object pre-configured with a colour theme for consistent, styled terminal output across all Foundry components
+- **Key Features**:
+  - `console` — module-level `Console` singleton, ready to use
+  - Colour theme: `success` (green), `info` / `logging.level.info` (purple4), `warning` (yellow1), `error` (red1), `debug` (light_cyan3)
+  - `AIGNOSTICS_CONSOLE_WIDTH` env var — overrides console width (defaults to Rich's auto-detect, 80 in non-TTY environments)
+  - `legacy_windows=False` — modern Windows terminal support
+- **Location**: `aignostics_foundry_core/console.py`
+- **Dependencies**: `rich>=13`
+
 ### health
 
 **Tree-structured health status for service health checks**
@@ -47,12 +61,22 @@ This file provides an overview of all modules in `aignostics_foundry_core`, thei
 ┌──────────────┴──────────────┐
 │    aignostics_foundry_core  │
 ├─────────────────────────────┤
+│           console           │
 │           health            │
 └─────────────────────────────┘
 ```
 
 ## Usage Examples
 
+```python
+from aignostics_foundry_core import console
+
+# Print with theme styles
+console.print("[success]Done![/success]")
+console.print("[warning]Caution: retrying...[/warning]")
+console.print("[error]Failed to connect.[/error]")
+```
+
 ```python
 from aignostics_foundry_core.health import Health, HealthStatus
 

src/aignostics_foundry_core/__init__.py

@@ -1 +1,4 @@
-"""Foundational infrastructure for Foundry components."""
+"""Foundational infrastructure for Foundry components.
+
+We do NOT export any of the public APIs of the Foundry components here; see docs/decisions/0002-module-structure.md.
+"""

src/aignostics_foundry_core/console.py

@@ -0,0 +1,31 @@
+"""Themed rich console."""
+
+import os
+
+from rich.console import Console
+from rich.theme import Theme
+
+
+def _get_console() -> Console:
+    """Get a themed rich console.
+
+    The console width can be set via the AIGNOSTICS_CONSOLE_WIDTH environment variable.
+
+    Returns:
+        Console: The themed rich console.
+    """
+    return Console(
+        theme=Theme({
+            "logging.level.info": "purple4",
+            "debug": "light_cyan3",
+            "success": "green",
+            "info": "purple4",
+            "warning": "yellow1",
+            "error": "red1",
+        }),
+        width=int(os.environ.get("AIGNOSTICS_CONSOLE_WIDTH", "0")) or None,
+        legacy_windows=False,  # Modern Windows (10+) doesn't need width adjustment
+    )
+
+
+console = _get_console()

tests/aignostics_foundry_core/console_test.py

@@ -0,0 +1,43 @@
+"""Tests for console module."""
+
+import importlib
+import sys
+
+import pytest
+from rich.console import Console
+
+from aignostics_foundry_core.console import console
+
+EXPECTED_THEME_KEYS = ["success", "info", "warning", "error", "debug", "logging.level.info"]
+
+
+class TestConsole:
+    """Tests for the themed rich console module."""
+
+    @pytest.mark.unit
+    def test_console_is_console_instance(self) -> None:
+        """Module-level console is a rich.console.Console instance."""
+        assert isinstance(console, Console)
+
+    @pytest.mark.unit
+    @pytest.mark.sequential
+    def test_console_default_width(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        """Module-level console has Rich's default width (80) when env var is not set."""
+        monkeypatch.delenv("AIGNOSTICS_CONSOLE_WIDTH", raising=False)
+        reloaded = importlib.reload(sys.modules["aignostics_foundry_core.console"])
+        assert reloaded.console.width == 80
+
+    @pytest.mark.unit
+    @pytest.mark.sequential
+    def test_console_custom_width(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        """Module-level console uses width from AIGNOSTICS_CONSOLE_WIDTH env var."""
+        monkeypatch.setenv("AIGNOSTICS_CONSOLE_WIDTH", "100")
+        reloaded = importlib.reload(sys.modules["aignostics_foundry_core.console"])
+        assert reloaded.console.width == 100
+
+    @pytest.mark.unit
+    def test_console_theme_contains_expected_keys(self) -> None:
+        """Console can render text with all required theme style names without error."""
+        for key in EXPECTED_THEME_KEYS:
+            style = console.get_style(key)
+            assert style is not None, f"Theme style '{key}' should be defined on the console."