refactor(agents,core,frontends): typed kinds, prompts per kind, frontend agents as parameters

src/beaver_gateway/core/conversations.py

@@ -36,6 +36,7 @@ from claude_agent_sdk import (
 from sqlmodel import col, select
 
 from beaver_gateway.core.injects import InjectQueue, inject_header
+from beaver_gateway.core.kinds import KINDS, Kind
 from beaver_gateway.core.transcript import (
     messages_from_entries,
     render_messages,
@@ -77,7 +78,6 @@ __all__ = [
 
 _log = logging.getLogger("beaver_gateway.core.conversations")
 
-KINDS = ("master", "branch", "deep", "job", "fork")
 SEEDS = ("clean", "morning", "copy", "brief")
 _STATUSES = ("open", "merged", "closed", "archived")
 _DEFAULT_MERGE_PROMPT = (
@@ -91,7 +91,7 @@ _UNITS = {"s": 1, "m": 60, "h": 3600, "d": 86400}
 
 @dataclass(frozen=True, slots=True)
 class SeedContext:
-    kind: str
+    kind: Kind
     seed: str
     agent: str
     parent: Conversation | None
@@ -177,7 +177,7 @@ class Conversations:
     async def create(
         self,
         *,
-        kind: str,
+        kind: Kind,
         agent: str,
         parent: Conversation | None = None,
         title: str | None = None,
@@ -406,7 +406,7 @@ class Conversations:
         msg = f"unknown frontend {name!r}"
         raise ValueError(msg)
 
-    def default_agent(self, kind: str) -> str | None:
+    def default_agent(self, kind: Kind) -> str | None:
         for fe in self._frontends:
             if kind in fe.kinds and (agent := fe.agent_for(kind)):
                 return agent
@@ -426,7 +426,7 @@ class Conversations:
     async def spawn(
         self,
         *,
-        kind: str,
+        kind: Kind,
         agent: str | None = None,
         seed: str = "clean",
         parent: Conversation | None = None,