feat(cli): arc-reactor startup banner for init/serve/ask (#397)

src/openjarvis/cli/_banner.py

@@ -0,0 +1,41 @@
+"""Startup banner — arc-reactor logo + OpenJarvis wordmark."""
+
+# ruff: noqa: E501 — Rich markup tags inflate source-line length; the rendered
+# banner stays under 80 displayed columns.
+
+from __future__ import annotations
+
+# Reactor on the left (5 lines, ~12 cols) + small ASCII wordmark on the right.
+# Last line carries the tagline so the whole block stays under 8 lines / 80 cols.
+_BANNER_LINES = (
+    r"   [blue]╭─────╮[/blue]      [bold bright_blue] ___                  _                 _    [/]",
+    r"  [blue]╱[/blue] [bright_blue]╭───╮[/bright_blue] [blue]╲[/blue]    [bold bright_blue]/ _ \ _ __  ___ _ _  | | __ _ _ ___  _(_)___[/]",
+    r" [blue]│[/blue]  [bright_blue]│[/bright_blue] [bold bright_white]◉[/] [bright_blue]│[/bright_blue]  [blue]│[/blue]  [bold bright_blue]| | | | '_ \/ -_) ' \ | |/ _` | '_\ V /| (_-<[/]",
+    r"  [blue]╲[/blue] [bright_blue]╰───╯[/bright_blue] [blue]╱[/blue]    [bold bright_blue]\___/| .__/\___|_||_||_|\__,_|_|  \_/ |_/__/[/]",
+    r"   [blue]╰─────╯[/blue]          [dim]|_|[/dim]     [cyan]Private AI on your machine[/cyan]",
+)
+
+_PLAIN_BANNER = (
+    r"   ╭─────╮       ___                  _                 _    ",
+    r"  ╱ ╭───╮ ╲     / _ \ _ __  ___ _ _  | | __ _ _ ___  _(_)___ ",
+    r" │  │ ◉ │  │   | | | | '_ \/ -_) ' \ | |/ _` | '_\ V /| (_-< ",
+    r"  ╲ ╰───╯ ╱     \___/| .__/\___|_||_||_|\__,_|_|  \_/ |_/__/ ",
+    r"   ╰─────╯           |_|     Private AI on your machine     ",
+)
+
+
+def print_banner(quiet: bool = False) -> None:
+    """Print the OpenJarvis startup banner. No-op when quiet."""
+    if quiet:
+        return
+    try:
+        from rich.console import Console
+
+        console = Console()
+        for line in _BANNER_LINES:
+            console.print(line, highlight=False)
+        console.print()
+    except ImportError:
+        for line in _PLAIN_BANNER:
+            print(line)
+        print()

src/openjarvis/cli/ask.py

@@ -11,6 +11,7 @@ import click
 from rich.console import Console
 from rich.table import Table
 
+from openjarvis.cli._banner import print_banner
 from openjarvis.cli._tool_names import resolve_tool_names
 from openjarvis.cli.hints import hint_no_engine
 from openjarvis.core.config import load_config
@@ -587,7 +588,9 @@ def _print_profile(
         "(default: ~/.openjarvis/knowledge.db)."
     ),
 )
+@click.pass_context
 def ask(
+    ctx: click.Context,
     query: tuple[str, ...],
     model_name: str | None,
     engine_key: str | None,
@@ -603,6 +606,8 @@ def ask(
     knowledge_db: str | None,
 ) -> None:
     """Ask Jarvis a question."""
+    quiet = (ctx.obj or {}).get("quiet", False) or output_json
+    print_banner(quiet=quiet)
     console = Console(stderr=True)
     query_text = " ".join(query)
 

src/openjarvis/cli/init_cmd.py

@@ -11,6 +11,7 @@ from rich.console import Console
 from rich.markup import escape
 from rich.panel import Panel
 
+from openjarvis.cli._banner import print_banner
 from openjarvis.cli._bootstrap import detect_cloud_keys
 from openjarvis.cli.model import find_model_spec, hf_download, ollama_pull
 from openjarvis.cli.scan_cmd import PrivacyScanner
@@ -290,7 +291,9 @@ def _do_download(engine: str, model: str, spec, console: Console) -> None:
     hidden=True,
     help="Run init non-interactively; called by the bare-jarvis first-run guard.",
 )
+@click.pass_context
 def init(
+    ctx: click.Context,
     force: bool,
     config: Optional[Path],
     full_config: bool = False,
@@ -303,6 +306,7 @@ def init(
     from_bare_jarvis: bool = False,
 ) -> None:
     """Detect hardware and generate ~/.openjarvis/config.toml."""
+    print_banner(quiet=(ctx.obj or {}).get("quiet", False))
     console = Console()
 
     # Cloud auto-detect — inform user if a key is in env.

src/openjarvis/cli/serve.py

@@ -8,6 +8,7 @@ import sys
 import click
 from rich.console import Console
 
+from openjarvis.cli._banner import print_banner
 from openjarvis.core.config import load_config
 from openjarvis.core.events import EventBus
 from openjarvis.engine import (
@@ -40,7 +41,9 @@ logger = logging.getLogger(__name__)
     default=None,
     help="Agent for non-streaming requests (simple, orchestrator, react, openhands).",
 )
+@click.pass_context
 def serve(
+    ctx: click.Context,
     host: str | None,
     port: int | None,
     engine_key: str | None,
@@ -48,6 +51,7 @@ def serve(
     agent_name: str | None,
 ) -> None:
     """Start the OpenAI-compatible API server."""
+    print_banner(quiet=(ctx.obj or {}).get("quiet", False))
     console = Console(stderr=True)
 
     # Check for server dependencies