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/hooks/auto-update-checker/index.ts

@@ -7,7 +7,34 @@ import { getConfigLoadErrors, clearConfigLoadErrors } from "../../shared/config-
 import type { AutoUpdateCheckerOptions } from "./types"
 
 export function createAutoUpdateCheckerHook(ctx: PluginInput, options: AutoUpdateCheckerOptions = {}) {
-  const { showStartupToast = true } = options
+  const { showStartupToast = true, isSisyphusEnabled = false } = options
+
+  const getToastMessage = (isUpdate: boolean, latestVersion?: string): string => {
+    if (isSisyphusEnabled) {
+      return isUpdate
+        ? `Sisyphus on steroids is steering OpenCode.\nv${latestVersion} available. Restart to apply.`
+        : `Sisyphus on steroids is steering OpenCode.`
+    }
+    return isUpdate
+      ? `OpenCode is now on Steroids. oMoMoMoMo...\nv${latestVersion} available. Restart OpenCode to apply.`
+      : `OpenCode is now on Steroids. oMoMoMoMo...`
+  }
+
+  const showVersionToast = async (version: string | null): Promise<void> => {
+    const displayVersion = version ?? "unknown"
+    await ctx.client.tui
+      .showToast({
+        body: {
+          title: `OhMyOpenCode ${displayVersion}`,
+          message: getToastMessage(false),
+          variant: "info" as const,
+          duration: 5000,
+        },
+      })
+      .catch(() => {})
+    log(`[auto-update-checker] Startup toast shown: v${displayVersion}`)
+  }
+
   let hasChecked = false
 
   return {
@@ -27,7 +54,7 @@ export function createAutoUpdateCheckerHook(ctx: PluginInput, options: AutoUpdat
           log("[auto-update-checker] Skipped: local development mode")
           if (showStartupToast) {
             const version = getLocalDevVersion(ctx.directory) ?? getCachedVersion()
-            await showVersionToast(ctx, version)
+            await showVersionToast(version)
           }
           return
         }
@@ -35,7 +62,7 @@ export function createAutoUpdateCheckerHook(ctx: PluginInput, options: AutoUpdat
         if (result.isPinned) {
           log(`[auto-update-checker] Skipped: version pinned to ${result.currentVersion}`)
           if (showStartupToast) {
-            await showVersionToast(ctx, result.currentVersion)
+            await showVersionToast(result.currentVersion)
           }
           return
         }
@@ -43,7 +70,7 @@ export function createAutoUpdateCheckerHook(ctx: PluginInput, options: AutoUpdat
         if (!result.needsUpdate) {
           log("[auto-update-checker] No update needed")
           if (showStartupToast) {
-            await showVersionToast(ctx, result.currentVersion)
+            await showVersionToast(result.currentVersion)
           }
           return
         }
@@ -54,7 +81,7 @@ export function createAutoUpdateCheckerHook(ctx: PluginInput, options: AutoUpdat
           .showToast({
             body: {
               title: `OhMyOpenCode ${result.latestVersion}`,
-              message: `OpenCode is now on Steroids. oMoMoMoMo...\nv${result.latestVersion} available. Restart OpenCode to apply.`,
+              message: getToastMessage(true, result.latestVersion ?? undefined),
               variant: "info" as const,
               duration: 8000,
             },
@@ -91,21 +118,6 @@ async function showConfigErrorsIfAny(ctx: PluginInput): Promise<void> {
   clearConfigLoadErrors()
 }
 
-async function showVersionToast(ctx: PluginInput, version: string | null): Promise<void> {
-  const displayVersion = version ?? "unknown"
-  await ctx.client.tui
-    .showToast({
-      body: {
-        title: `OhMyOpenCode ${displayVersion}`,
-        message: `OpenCode is now on Steroids. oMoMoMoMo...`,
-        variant: "info" as const,
-        duration: 5000,
-      },
-    })
-    .catch(() => {})
-  log(`[auto-update-checker] Startup toast shown: v${displayVersion}`)
-}
-
 export type { UpdateCheckResult, AutoUpdateCheckerOptions } from "./types"
 export { checkForUpdate } from "./checker"
 export { invalidatePackage, invalidateCache } from "./cache"