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/config/schema.ts

@@ -17,7 +17,7 @@ const AgentPermissionSchema = z.object({
 })
 
 export const BuiltinAgentNameSchema = z.enum([
-  "OmO",
+  "Sisyphus",
   "oracle",
   "librarian",
   "explore",
@@ -29,8 +29,8 @@ export const BuiltinAgentNameSchema = z.enum([
 export const OverridableAgentNameSchema = z.enum([
   "build",
   "plan",
-  "OmO",
-  "OmO-Plan",
+  "Sisyphus",
+  "Planner-Sisyphus",
   "oracle",
   "librarian",
   "explore",
@@ -84,8 +84,8 @@ export const AgentOverrideConfigSchema = z.object({
 export const AgentOverridesSchema = z.object({
   build: AgentOverrideConfigSchema.optional(),
   plan: AgentOverrideConfigSchema.optional(),
-  OmO: AgentOverrideConfigSchema.optional(),
-  "OmO-Plan": AgentOverrideConfigSchema.optional(),
+  Sisyphus: AgentOverrideConfigSchema.optional(),
+  "Planner-Sisyphus": AgentOverrideConfigSchema.optional(),
   oracle: AgentOverrideConfigSchema.optional(),
   librarian: AgentOverrideConfigSchema.optional(),
   explore: AgentOverrideConfigSchema.optional(),
@@ -102,7 +102,7 @@ export const ClaudeCodeConfigSchema = z.object({
   hooks: z.boolean().optional(),
 })
 
-export const OmoAgentConfigSchema = z.object({
+export const SisyphusAgentConfigSchema = z.object({
   disabled: z.boolean().optional(),
 })
 
@@ -120,7 +120,7 @@ export const OhMyOpenCodeConfigSchema = z.object({
   agents: AgentOverridesSchema.optional(),
   claude_code: ClaudeCodeConfigSchema.optional(),
   google_auth: z.boolean().optional(),
-  omo_agent: OmoAgentConfigSchema.optional(),
+  sisyphus_agent: SisyphusAgentConfigSchema.optional(),
   experimental: ExperimentalConfigSchema.optional(),
 })
 
@@ -129,7 +129,7 @@ export type AgentOverrideConfig = z.infer<typeof AgentOverrideConfigSchema>
 export type AgentOverrides = z.infer<typeof AgentOverridesSchema>
 export type AgentName = z.infer<typeof AgentNameSchema>
 export type HookName = z.infer<typeof HookNameSchema>
-export type OmoAgentConfig = z.infer<typeof OmoAgentConfigSchema>
+export type SisyphusAgentConfig = z.infer<typeof SisyphusAgentConfigSchema>
 export type ExperimentalConfig = z.infer<typeof ExperimentalConfigSchema>
 
 export { McpNameSchema, type McpName } from "../mcp/types"