feat(cli): add 'bunx oh-my-opencode run' command for persistent agent sessions (#228)

- Add new 'run' command using @opencode-ai/sdk to manage agent sessions
- Implement recursive descendant session checking (waits for ALL nested child sessions)
- Add completion conditions: all todos done + all descendant sessions idle
- Add SSE event processing for session state tracking
- Fix todo-continuation-enforcer to clean up session tracking
- Comprehensive test coverage with memory-safe test patterns

Unlike 'opencode run', this command ensures the agent completes all tasks
by recursively waiting for nested background agent sessions before exiting.

🤖 Generated with assistance of OhMyOpenCode (https://github.com/code-yeongyu/oh-my-opencode)

src/cli/run/completion.ts

@@ -0,0 +1,79 @@
+import pc from "picocolors"
+import type { RunContext, Todo, ChildSession, SessionStatus } from "./types"
+
+export async function checkCompletionConditions(ctx: RunContext): Promise<boolean> {
+  try {
+    if (!await areAllTodosComplete(ctx)) {
+      return false
+    }
+
+    if (!await areAllChildrenIdle(ctx)) {
+      return false
+    }
+
+    return true
+  } catch {
+    // API errors are transient - silently continue polling
+    return false
+  }
+}
+
+async function areAllTodosComplete(ctx: RunContext): Promise<boolean> {
+  const todosRes = await ctx.client.session.todo({ path: { id: ctx.sessionID } })
+  const todos = (todosRes.data ?? []) as Todo[]
+
+  const incompleteTodos = todos.filter(
+    (t) => t.status !== "completed" && t.status !== "cancelled"
+  )
+
+  if (incompleteTodos.length > 0) {
+    console.log(pc.dim(`  Waiting: ${incompleteTodos.length} todos remaining`))
+    return false
+  }
+
+  return true
+}
+
+async function areAllChildrenIdle(ctx: RunContext): Promise<boolean> {
+  const allStatuses = await fetchAllStatuses(ctx)
+  return areAllDescendantsIdle(ctx, ctx.sessionID, allStatuses)
+}
+
+async function fetchAllStatuses(
+  ctx: RunContext
+): Promise<Record<string, SessionStatus>> {
+  const statusRes = await ctx.client.session.status()
+  return (statusRes.data ?? {}) as Record<string, SessionStatus>
+}
+
+async function areAllDescendantsIdle(
+  ctx: RunContext,
+  sessionID: string,
+  allStatuses: Record<string, SessionStatus>
+): Promise<boolean> {
+  const childrenRes = await ctx.client.session.children({
+    path: { id: sessionID },
+  })
+  const children = (childrenRes.data ?? []) as ChildSession[]
+
+  for (const child of children) {
+    const status = allStatuses[child.id]
+    if (status && status.type !== "idle") {
+      console.log(
+        pc.dim(`  Waiting: session ${child.id.slice(0, 8)}... is ${status.type}`)
+      )
+      return false
+    }
+
+    const descendantsIdle = await areAllDescendantsIdle(
+      ctx,
+      child.id,
+      allStatuses
+    )
+    if (!descendantsIdle) {
+      return false
+    }
+  }
+
+  return true
+}