feat: forward agent display identity to prompts

bot_bottle/contrib/claude/agent_provider.py

@@ -38,6 +38,27 @@ def _skills_dir(guest_home: str) -> str:
 def _prompt_path(guest_home: str) -> str:
     return f"{guest_home}/.bot-bottle-prompt.txt"
 
+
+def _display_identity_prompt(label: str, color: str) -> str:
+    lines: list[str] = []
+    if label:
+        lines.append(f"Name: {label}")
+    if color:
+        lines.append(f"Color: {color}")
+    if not lines:
+        return ""
+    return "Bot-bottle agent display identity:\n" + "\n".join(lines)
+
+
+def _prepend_display_identity(prompt_file: Path, label: str, color: str) -> bool:
+    identity = _display_identity_prompt(label, color)
+    original = prompt_file.read_text() if prompt_file.exists() else ""
+    if not identity:
+        return bool(original)
+    prompt_file.write_text(f"{identity}\n\n{original}" if original else f"{identity}\n")
+    return True
+
+
 _RUNTIME = AgentProviderRuntime(
     template="claude",
     command="claude",
@@ -106,6 +127,7 @@ class ClaudeAgentProvider(AgentProvider):
             env_vars["CLAUDE_CODE_OAUTH_TOKEN"] = "egress-placeholder"
             hidden_env_names = frozenset({"CLAUDE_CODE_OAUTH_TOKEN"})
 
+        has_prompt = _prepend_display_identity(prompt_file, label, color)
         return AgentProvisionPlan(
             template=_RUNTIME.template,
             command=_RUNTIME.command,
@@ -117,6 +139,7 @@ class ClaudeAgentProvider(AgentProvider):
             prompt_file=prompt_file,
             env_vars=env_vars,
             guest_env=resolved_guest_env,
+            has_prompt=has_prompt,
             files=files,
             egress_routes=egress_routes,
             hidden_env_names=hidden_env_names,
@@ -158,7 +181,7 @@ class ClaudeAgentProvider(AgentProvider):
             user="root",
         )
         agent = plan.spec.manifest.agents[plan.spec.agent_name]
-        return prompt_path if agent.prompt else None
+        return prompt_path if plan.agent_provision.has_prompt or agent.prompt else None
 
     def provision(self, plan: "BottlePlan", bottle: "Bottle") -> None:
         """Apply the claude-side declarative provision steps from