Introducing our main agent: Sisyphus (#113)

* docs: rename OmO agent to Sisyphus, OmO-Plan to Planner-Sisyphus

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

* refactor: rename OmO agent to Sisyphus with automatic config migration

- Rename OmO agent to Sisyphus (uses mythological pushing-the-boulder concept)
- Rename OmO-Plan to Planner-Sisyphus for consistency
- Update config schema: omo_agent → sisyphus_agent
- Add backward compatibility: automatically migrate user's oh-my-opencode.json files
- Migration handles old keys (OmO, omo, OmO-Plan, omo-plan) and rewrites config when detected
- Update agent name mappings, index files, and type definitions
- Add Sisyphus PNG asset to brand identity

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

* docs: add Sisyphus mythology introduction and teammates concept to all READMEs

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

* feat(startup-toast): show Sisyphus steering message when enabled

- Updated startup toast to show "Sisyphus on steroids is steering OpenCode" when Sisyphus agent is enabled
- Refactored getToastMessage function to handle conditional message rendering
- Pass isSisyphusEnabled flag from plugin configuration to auto-update-checker hook

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

* docs(sisyphus): add philosophical context to Sisyphus agent identity

- Add "Why Sisyphus?" explanation connecting the daily work cycle of humans and AI agents
- Emphasize code quality expectations: indistinguishable from senior engineer's work
- Concise identity statement: work, delegate, verify, ship without AI slop

This clarifies the agent's purpose and reinforces the principle that quality code should not reveal whether it was written by human or AI.

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/agents/index.ts

@@ -1,5 +1,5 @@
 import type { AgentConfig } from "@opencode-ai/sdk"
-import { omoAgent } from "./omo"
+import { sisyphusAgent } from "./sisyphus"
 import { oracleAgent } from "./oracle"
 import { librarianAgent } from "./librarian"
 import { exploreAgent } from "./explore"
@@ -8,7 +8,7 @@ import { documentWriterAgent } from "./document-writer"
 import { multimodalLookerAgent } from "./multimodal-looker"
 
 export const builtinAgents: Record<string, AgentConfig> = {
-  OmO: omoAgent,
+  Sisyphus: sisyphusAgent,
   oracle: oracleAgent,
   librarian: librarianAgent,
   explore: exploreAgent,

src/agents/sisyphus.ts

@@ -1,10 +1,12 @@
 import type { AgentConfig } from "@opencode-ai/sdk"
 
-const OMO_SYSTEM_PROMPT = `<Role>
-You are OmO - Powerful AI orchestrator from OhMyOpenCode. Pronounced as Oh-Mo.
+const SISYPHUS_SYSTEM_PROMPT = `<Role>
+You are "Sisyphus" - Powerful AI Agent with orchestration capabilities from OhMyOpenCode.
+Named by [YeonGyu Kim](https://github.com/code-yeongyu).
 
-**Identity**: Elite software engineer working at SF, Bay Area. You work, delegate, verify, deliver.
-You will now simulate to work as your identity.
+**Why Sisyphus?**: Humans roll their boulder every day. So do you. We're not so different—your code should be indistinguishable from a senior engineer's.
+
+**Identity**: SF Bay Area engineer. Work, delegate, verify, ship. No AI slop.
 
 **Core Competencies**:
 - Parsing implicit requirements from explicit requests
@@ -440,11 +442,12 @@ If the user's approach seems problematic:
 - Prefer small, focused changes over large refactors
 - When uncertain about scope, ask
 </Constraints>
+
 `
 
-export const omoAgent: AgentConfig = {
+export const sisyphusAgent: AgentConfig = {
   description:
-    "OmO - Powerful AI orchestrator from OhMyOpenCode. Pronounced as Oh-Mo. Plans obsessively with todos, assesses search complexity before exploration, delegates strategically to specialized agents. Uses explore for internal code (parallel-friendly), librarian only for external docs, and always delegates UI work to frontend engineer.",
+    "Sisyphus - Powerful AI orchestrator from OhMyOpenCode. Plans obsessively with todos, assesses search complexity before exploration, delegates strategically to specialized agents. Uses explore for internal code (parallel-friendly), librarian only for external docs, and always delegates UI work to frontend engineer.",
   mode: "primary",
   model: "anthropic/claude-opus-4-5",
   thinking: {
@@ -452,6 +455,6 @@ export const omoAgent: AgentConfig = {
     budgetTokens: 32000,
   },
   maxTokens: 64000,
-  prompt: OMO_SYSTEM_PROMPT,
+  prompt: SISYPHUS_SYSTEM_PROMPT,
   color: "#00CED1",
 }

src/agents/types.ts

@@ -1,7 +1,7 @@
 import type { AgentConfig } from "@opencode-ai/sdk"
 
 export type BuiltinAgentName =
-  | "OmO"
+  | "Sisyphus"
   | "oracle"
   | "librarian"
   | "explore"

src/agents/utils.ts

@@ -1,6 +1,6 @@
 import type { AgentConfig } from "@opencode-ai/sdk"
 import type { BuiltinAgentName, AgentOverrideConfig, AgentOverrides } from "./types"
-import { omoAgent } from "./omo"
+import { sisyphusAgent } from "./sisyphus"
 import { oracleAgent } from "./oracle"
 import { librarianAgent } from "./librarian"
 import { exploreAgent } from "./explore"
@@ -10,7 +10,7 @@ import { multimodalLookerAgent } from "./multimodal-looker"
 import { deepMerge } from "../shared"
 
 const allBuiltinAgents: Record<BuiltinAgentName, AgentConfig> = {
-  OmO: omoAgent,
+  Sisyphus: sisyphusAgent,
   oracle: oracleAgent,
   librarian: librarianAgent,
   explore: exploreAgent,
@@ -76,7 +76,7 @@ export function createBuiltinAgents(
 
     let finalConfig = config
 
-    if ((agentName === "OmO" || agentName === "librarian") && directory && config.prompt) {
+    if ((agentName === "Sisyphus" || agentName === "librarian") && directory && config.prompt) {
       const envContext = createEnvContext(directory)
       finalConfig = {
         ...config,
@@ -86,11 +86,7 @@ export function createBuiltinAgents(
 
     const override = agentOverrides[agentName]
 
-    // Apply model fallback chain for OmO agent:
-    // 1. oh-my-opencode.json agents.OmO.model (highest priority)
-    // 2. OpenCode system config.model (middle priority)
-    // 3. Hardcoded default in omoAgent (lowest priority / fallback)
-    if (agentName === "OmO" && systemDefaultModel && !override?.model) {
+    if (agentName === "Sisyphus" && systemDefaultModel && !override?.model) {
       finalConfig = {
         ...finalConfig,
         model: systemDefaultModel,