Add display names to all core agents via name field

Sisyphus (Ultraworker), Hephaestus (Deep Agent), Prometheus (Plan Builder),
Atlas (Plan Executor), Metis (Plan Consultant), Momus (Plan Critic).

Requires opencode fix: Agent.get() fallback to name-based lookup when key
lookup fails, since opencode stores agent.name in messages and reuses it
for subsequent Agent.get() calls.

src/agents/atlas/agent.ts

@@ -99,6 +99,7 @@ export function createAtlasAgent(ctx: OrchestratorContext): AgentConfig {
   ])
 
   const baseConfig = {
+    name: "Atlas (Plan Executor)",
     description:
       "Orchestrates work via task() to complete ALL tasks in a todo list until fully done. (Atlas - OhMyOpenCode)",
     mode: MODE,

src/agents/hephaestus.ts

@@ -633,6 +633,7 @@ export function createHephaestusAgent(
     : buildHephaestusPrompt([], tools, skills, categories, useTaskSystem);
 
   return {
+    name: "Hephaestus (Deep Agent)",
     description:
       "Autonomous Deep Worker - goal-oriented execution with GPT 5.2 Codex. Explores thoroughly before acting, uses explore/librarian agents for comprehensive context, completes tasks end-to-end. Inspired by AmpCode deep mode. (Hephaestus - OhMyOpenCode)",
     mode: MODE,

src/agents/metis.ts

@@ -311,6 +311,7 @@ const metisRestrictions = createAgentToolRestrictions([
 
 export function createMetisAgent(model: string): AgentConfig {
   return {
+    name: "Metis (Plan Consultant)",
     description:
       "Pre-planning consultant that analyzes requests to identify hidden intentions, ambiguities, and AI failure points. (Metis - OhMyOpenCode)",
     mode: MODE,

src/agents/momus.ts

@@ -197,6 +197,7 @@ export function createMomusAgent(model: string): AgentConfig {
   ])
 
   const base = {
+    name: "Momus (Plan Critic)",
     description:
       "Expert reviewer for evaluating work plans against rigorous clarity, verifiability, and completeness standards. (Momus - OhMyOpenCode)",
     mode: MODE,

src/agents/sisyphus.ts

@@ -539,6 +539,7 @@ export function createSisyphusAgent(
     call_omo_agent: "deny",
   } as AgentConfig["permission"];
   const base = {
+    name: "Sisyphus (Ultraworker)",
     description:
       "Powerful AI orchestrator. Plans obsessively with todos, assesses search complexity before exploration, delegates strategically via category+skills combinations. Uses explore for internal code (parallel-friendly), librarian for external docs. (Sisyphus - OhMyOpenCode)",
     mode: MODE,

src/plugin-handlers/prometheus-agent-config-builder.ts

@@ -66,7 +66,7 @@ export async function buildPrometheusAgentConfig(params: {
     params.pluginPrometheusOverride?.maxTokens ?? categoryConfig?.maxTokens;
 
   const base: Record<string, unknown> = {
-    name: "prometheus",
+    name: "Prometheus (Plan Builder)",
     ...(resolvedModel ? { model: resolvedModel } : {}),
     ...(variantToUse ? { variant: variantToUse } : {}),
     mode: "all",