feat(athena): split into athena (interactive) and athena-junior (subagent)

Split the Athena council orchestrator into two distinct agents:
- athena: primary mode, interactive prompt with Question tool and switch_agent
- athena-junior: subagent mode, non-interactive prompt with structured JSON output

Key changes:
- Create athena-junior-agent.ts factory (mode=subagent, denies question+call_omo_agent)
- Revert athena agent.ts to primary mode (no env var switching)
- Make buildAthenaRuntimeGuidance mode-aware (strips action_paths for non-interactive)
- Add mode parameter to council_finalize tool
- Register athena-junior in builtin-agents, tool-config, model-requirements
- Replace "athena" with "athena-junior" in call_omo_agent ALLOWED_AGENTS
- Update all tests for new architecture

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/tools/call-omo-agent/constants.ts

@@ -6,7 +6,7 @@ export const ALLOWED_AGENTS = [
   "metis",
   "momus",
   "multimodal-looker",
-  "athena",
+  "athena-junior",
 ] as const
 
 export const CALL_OMO_AGENT_DESCRIPTION = `Spawn explore/librarian agent or custom agents. run_in_background REQUIRED (true=async with task_id, false=sync).

src/tools/call-omo-agent/tools.test.ts

@@ -512,7 +512,7 @@ describe("createCallOmoAgent", () => {
     expect(result).toContain("background_task.maxDepth=3")
   })
 
-  test("should accept athena as a valid agent type", async () => {
+  test("should accept athena-junior as a valid agent type", async () => {
     //#given
     const toolDef = createCallOmoAgent(mockCtx, mockBackgroundManager, [])
     const executeFunc = toolDef.execute as Function
@@ -522,7 +522,7 @@ describe("createCallOmoAgent", () => {
       {
         description: "Test",
         prompt: "Test prompt",
-        subagent_type: "athena",
+        subagent_type: "athena-junior",
         run_in_background: true,
       },
       { sessionID: "test", messageID: "msg", agent: "test", abort: new AbortController().signal }

src/tools/council-archive/create-council-finalize.ts

@@ -11,6 +11,7 @@ import {
   resolveCouncilIntent,
   COUNCIL_DEFAULTS,
 } from "../../agents/athena"
+import type { CouncilGuidanceMode } from "../../agents/athena"
 import type { CouncilFinalizeArgs, CouncilMemberResult, CouncilFinalizeResult } from "./types"
 
 export function createCouncilFinalize(
@@ -30,6 +31,10 @@ export function createCouncilFinalize(
         .describe(`Classified question intent used for runtime Athena guidance injection. Valid intents: ${getValidCouncilIntents().join(", ")}`),
       question: tool.schema.string().optional().describe("Original user question that triggered the council"),
       prompt_file: tool.schema.string().optional().describe("Path to the council prompt temp file (will be moved into the archive)"),
+      mode: tool.schema
+        .string()
+        .optional()
+        .describe('Council guidance mode: "interactive" (default) includes action paths with Question tool, "non-interactive" strips action paths for programmatic use'),
     },
     async execute(args: CouncilFinalizeArgs, toolContext) {
       const resolvedIntent = resolveCouncilIntent(args.intent)
@@ -154,7 +159,8 @@ export function createCouncilFinalize(
         members,
       }
 
-      const guidance = buildAthenaRuntimeGuidance(resolvedIntent)
+      const resolvedMode = (args.mode === "non-interactive" ? "non-interactive" : "interactive") as CouncilGuidanceMode
+      const guidance = buildAthenaRuntimeGuidance(resolvedIntent, resolvedMode)
       return JSON.stringify(result, null, 2) + "\n\n" + guidance
     },
   })

src/tools/council-archive/types.ts

@@ -4,6 +4,7 @@ export interface CouncilFinalizeArgs {
   intent: string
   question?: string
   prompt_file?: string
+  mode?: string
 }
 
 export interface CouncilMemberResult {