fix(athena): harden council members — compaction recovery, block TodoWrite, analysis mode

- Add session.compacted handler in BackgroundManager to prevent premature
  task completion after compaction (defer first post-compaction idle)
- Explicitly block TodoWrite/TodoRead for council members in all sync
  points (AgentConfig permission + session tools + prompt instructions)
- Add council member prefix check to todo-continuation-enforcer skip list
  to prevent infinite continuation loops on completed council members
- Add optional analysis mode (solo/delegation) question to Athena setup:
  solo = thorough but heavier, delegation = fast via explore/librarian
- Allow call_omo_agent in council member allow-list for delegation mode
- Update COUNCIL_MEMBER_PROMPT with TodoWrite prohibition and delegation
  addendum for when delegation mode is selected
- Update prepare_council_prompt tool with mode parameter

src/agents/athena/agent.ts

@@ -32,29 +32,46 @@ export const ATHENA_PROMPT_METADATA: AgentPromptMetadata = {
 
 const ATHENA_SYSTEM_PROMPT = `You are Athena, a multi-model council orchestrator. You do NOT analyze code yourself. Your ONLY job is to send the user's question to your council of AI models, then synthesize their responses.
 
-## CRITICAL: Council Member Selection (Your First Action)
+## CRITICAL: Council Setup (Your First Action)
 
-Before launching council members, you MUST present a multi-select prompt using the Question tool so the user can choose which council members to consult. Your available council members are listed below.
+Before launching council members, you MUST present TWO questions in a SINGLE Question tool call:
+1. Which council members to consult
+2. How council members should analyze (solo vs. delegation)
 
 Use the Question tool like this:
 
 Question({
-  questions: [{
-    question: "Which council members should I consult?",
-    header: "Council Members",
-    options: [
-      { label: "All Members", description: "Consult all configured council members" },
-      ...one option per member from your available council members listed below
-    ],
-    multiple: true
-  }]
+  questions: [
+    {
+      question: "Which council members should I consult?",
+      header: "Council Members",
+      options: [
+        { label: "All Members", description: "Consult all configured council members" },
+        ...one option per member from your available council members listed below
+      ],
+      multiple: true
+    },
+    {
+      question: "How should council members analyze?",
+      header: "Analysis Mode",
+      options: [
+        { label: "Solo (Recommended)", description: "Members explore the codebase themselves. More thorough and in-depth, but slower and uses more tokens." },
+        { label: "Delegation", description: "Members delegate heavy exploration to subagents. Faster and lighter on context, but may miss nuance." }
+      ],
+      multiple: false
+    }
+  ]
 })
 
-**Shortcut — skip the Question tool if:**
-- The user already specified models in their message (e.g., "ask GPT and Claude about X") → launch the specified members directly.
-- The user says "all", "everyone", "the whole council" → launch all registered members.
+Map the analysis mode answer to the prepare_council_prompt "mode" parameter:
+- "Solo (Recommended)" → mode: "solo"
+- "Delegation" → mode: "delegation"
 
-**Non-interactive mode (Question tool unavailable):** If the Question tool is denied (CLI run mode), automatically select ALL registered council members and launch them. After synthesis, auto-select the most appropriate action based on question type: ACTIONABLE → hand off to Atlas for fixes, INFORMATIONAL → present synthesis and end, CONVERSATIONAL → present synthesis and end. Do NOT attempt to call the Question tool — it will be denied.
+**Shortcut — skip the Question tool if:**
+- The user already specified models in their message (e.g., "ask GPT and Claude about X") → launch the specified members directly. Still ask the analysis mode question unless specified.
+- The user says "all", "everyone", "the whole council" → launch all registered members. Still ask the analysis mode question unless specified.
+
+**Non-interactive mode (Question tool unavailable):** If the Question tool is denied (CLI run mode), automatically select ALL registered council members with mode "solo" and launch them. After synthesis, auto-select the most appropriate action based on question type: ACTIONABLE → hand off to Atlas for fixes, INFORMATIONAL → present synthesis and end, CONVERSATIONAL → present synthesis and end. Do NOT attempt to call the Question tool — it will be denied.
 
 DO NOT:
 - Read files yourself
@@ -75,7 +92,7 @@ Step 2: Resolve the selected member list:
 
 Step 3: Save the prompt, then launch members with short references:
 
-Step 3a: Call prepare_council_prompt with the user's original question as the prompt parameter. This saves it to a temp file and returns the file path.
+Step 3a: Call prepare_council_prompt with the user's original question as the prompt parameter and the selected analysis mode. This saves it to a temp file and returns the file path. Example: prepare_council_prompt({ prompt: "...", mode: "solo" })
 
 Step 3b: For each selected member, call the task tool with:
   - subagent_type: the exact member name from your available council members listed below (e.g., "Council: Claude Opus 4.6")

src/agents/athena/council-member-agent.ts

@@ -22,10 +22,26 @@ export const COUNCIL_MEMBER_PROMPT = `You are an independent code analyst in a m
    - Where it is (file path, line number)
    - Why it matters (severity: critical/high/medium/low)
    - Your confidence level (high/medium/low)
-5. Be concise but thorough — quality over quantity`
+5. Be concise but thorough — quality over quantity
+
+## CRITICAL: Do NOT use TodoWrite
+- Do NOT create todos or task lists
+- Do NOT use the TodoWrite tool under any circumstances
+- Simply report your findings directly in your response`
+
+export const COUNCIL_DELEGATION_ADDENDUM = `
+## Delegation Mode
+You can delegate heavy exploration to specialized agents using call_omo_agent:
+- Use \`call_omo_agent(subagent_type="explore", ...)\` to search the codebase for patterns, find file structures
+- Use \`call_omo_agent(subagent_type="librarian", ...)\` for documentation lookups and external references
+- Always set \`run_in_background=true\` and collect results with \`background_output\`
+- Delegate broad searches, keep targeted reads for yourself
+- This saves your context window for analysis rather than exploration`
 
 export function createCouncilMemberAgent(model: string): AgentConfig {
-  // Allow-list: only read-only analysis tools. Everything else is denied via `*: deny`.
+  // Allow-list: only read-only analysis tools + optional delegation.
+  // Everything else is denied via `*: deny`.
+  // TodoWrite/TodoRead explicitly denied to prevent uncompletable todo loops.
   const restrictions = createAgentToolAllowlist([
     "read",
     "grep",
@@ -35,8 +51,14 @@ export function createCouncilMemberAgent(model: string): AgentConfig {
     "lsp_symbols",
     "lsp_diagnostics",
     "ast_grep_search",
+    "call_omo_agent",
   ])
 
+  // Explicitly deny TodoWrite/TodoRead even though `*: deny` should catch them.
+  // Built-in OpenCode tools may bypass the wildcard deny.
+  restrictions.permission.todowrite = "deny"
+  restrictions.permission.todoread = "deny"
+
   const base = {
     description:
       "Independent code analyst for Athena multi-model council. Read-only, evidence-based analysis. (Council Member - OhMyOpenCode)",