feat(agents): named and labelled agents with optional ANSI color

Chunk 1 (schema + storage): BottleSpec, ActiveAgent, and BottleMetadata
gain label and color fields. Both docker and smolmachines backends
persist them to metadata.json on prepare and surface them in
enumerate_active_agents(). AgentProvider.provision_plan() passes
label/color through to the Claude provider, which injects them into
claude.json so claude-code displays the session name and color in its
header. Codex provider accepts and ignores the knobs.

Chunk 2 (curses modal + display): cmd_start presents a two-step curses
modal — first edit the label (first keystroke replaces the pre-fill),
then optionally pick a color. cli list active renders label with ANSI
escape codes when the terminal supports it, falling back to agent_name
when no label is set.

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

bot_bottle/cli/list.py

@@ -3,12 +3,47 @@
 from __future__ import annotations
 
 import argparse
+import os
 import sys
 
 from ..backend import enumerate_active_agents
 from ..manifest import Manifest
 from ._common import PROG, USER_CWD
 
+_ANSI_COLOR_CODES: dict[str, str] = {
+    "black": "\033[30m",
+    "red": "\033[31m",
+    "green": "\033[32m",
+    "yellow": "\033[33m",
+    "blue": "\033[34m",
+    "magenta": "\033[35m",
+    "cyan": "\033[36m",
+    "white": "\033[37m",
+    "bright-black": "\033[90m",
+    "bright-red": "\033[91m",
+    "bright-green": "\033[92m",
+    "bright-yellow": "\033[93m",
+    "bright-blue": "\033[94m",
+    "bright-magenta": "\033[95m",
+    "bright-cyan": "\033[96m",
+    "bright-white": "\033[97m",
+}
+_ANSI_RESET = "\033[0m"
+
+
+def _ansi_label(text: str, color: str) -> str:
+    if not color:
+        return text
+    if not sys.stdout.isatty():
+        return text
+    term = os.environ.get("TERM", "")
+    if term in ("dumb", ""):
+        return text
+    code = _ANSI_COLOR_CODES.get(color)
+    if not code:
+        return text
+    return f"{code}{text}{_ANSI_RESET}"
+
 
 def cmd_list(argv: list[str]) -> int:
     parser = argparse.ArgumentParser(prog=f"{PROG} list", add_help=True)
@@ -27,11 +62,11 @@ def cmd_list(argv: list[str]) -> int:
     if not active:
         print("no active bot-bottle bottles", file=sys.stderr)
         return 0
-    # One line per bottle: `<backend>\t<slug>\t<agent>\t<status>`.
-    # Tab-separated keeps the format stable for shell pipelines;
-    # the dashboard renders the same data through its own
-    # formatter.
+    # One line per bottle: `<backend>\t<slug>\t<label>\t<services>`.
+    # Tab-separated keeps the format stable for shell pipelines.
     for b in active:
         services = ",".join(b.services) if b.services else "-"
-        print(f"{b.backend_name}\t{b.slug}\t{b.agent_name}\t{services}")
+        display_name = b.label if b.label else b.agent_name
+        colored_name = _ansi_label(display_name, b.color)
+        print(f"{b.backend_name}\t{b.slug}\t{colored_name}\t{services}")
     return 0