refactor: wave 2 - split atlas, auto-update-checker, session-recovery, todo-enforcer, background-task hooks

- Extract atlas/ into 15 focused modules (hook, event handler, tool policies, types, etc.)
- Split auto-update-checker into checker/ and hook/ subdirectories with single-purpose files
- Decompose session-recovery into separate recovery strategy files per error type
- Extract todo-continuation-enforcer from monolith to directory with dedicated modules
- Split background-task/tools.ts into individual tool creator files
- Extract command-executor, tmux-utils into focused sub-modules
- Split config/schema.ts into domain-specific schema files
- Decompose cli/config-manager.ts into focused modules
- Rollback skill-mcp-manager, model-availability, index.ts splits that broke tests
- Fix all import path depths for moved files (../../ -> ../../../)
- Add explicit type annotations to resolve TS7006 implicit any errors

Typecheck: 0 errors
Tests: 2359 pass, 5 fail (all pre-existing)

src/config/schema/oh-my-opencode-config.ts

@@ -0,0 +1,57 @@
+import { z } from "zod"
+import { AnyMcpNameSchema } from "../../mcp/types"
+import { BuiltinAgentNameSchema, BuiltinSkillNameSchema } from "./agent-names"
+import { AgentOverridesSchema } from "./agent-overrides"
+import { BabysittingConfigSchema } from "./babysitting"
+import { BackgroundTaskConfigSchema } from "./background-task"
+import { BrowserAutomationConfigSchema } from "./browser-automation"
+import { CategoriesConfigSchema } from "./categories"
+import { ClaudeCodeConfigSchema } from "./claude-code"
+import { CommentCheckerConfigSchema } from "./comment-checker"
+import { BuiltinCommandNameSchema } from "./commands"
+import { ExperimentalConfigSchema } from "./experimental"
+import { GitMasterConfigSchema } from "./git-master"
+import { HookNameSchema } from "./hooks"
+import { NotificationConfigSchema } from "./notification"
+import { RalphLoopConfigSchema } from "./ralph-loop"
+import { SkillsConfigSchema } from "./skills"
+import { SisyphusConfigSchema } from "./sisyphus"
+import { SisyphusAgentConfigSchema } from "./sisyphus-agent"
+import { TmuxConfigSchema } from "./tmux"
+import { WebsearchConfigSchema } from "./websearch"
+
+export const OhMyOpenCodeConfigSchema = z.object({
+  $schema: z.string().optional(),
+  /** Enable new task system (default: false) */
+  new_task_system_enabled: z.boolean().optional(),
+  /** Default agent name for `oh-my-opencode run` (env: OPENCODE_DEFAULT_AGENT) */
+  default_run_agent: z.string().optional(),
+  disabled_mcps: z.array(AnyMcpNameSchema).optional(),
+  disabled_agents: z.array(BuiltinAgentNameSchema).optional(),
+  disabled_skills: z.array(BuiltinSkillNameSchema).optional(),
+  disabled_hooks: z.array(HookNameSchema).optional(),
+  disabled_commands: z.array(BuiltinCommandNameSchema).optional(),
+  /** Disable specific tools by name (e.g., ["todowrite", "todoread"]) */
+  disabled_tools: z.array(z.string()).optional(),
+  agents: AgentOverridesSchema.optional(),
+  categories: CategoriesConfigSchema.optional(),
+  claude_code: ClaudeCodeConfigSchema.optional(),
+  sisyphus_agent: SisyphusAgentConfigSchema.optional(),
+  comment_checker: CommentCheckerConfigSchema.optional(),
+  experimental: ExperimentalConfigSchema.optional(),
+  auto_update: z.boolean().optional(),
+  skills: SkillsConfigSchema.optional(),
+  ralph_loop: RalphLoopConfigSchema.optional(),
+  background_task: BackgroundTaskConfigSchema.optional(),
+  notification: NotificationConfigSchema.optional(),
+  babysitting: BabysittingConfigSchema.optional(),
+  git_master: GitMasterConfigSchema.optional(),
+  browser_automation_engine: BrowserAutomationConfigSchema.optional(),
+  websearch: WebsearchConfigSchema.optional(),
+  tmux: TmuxConfigSchema.optional(),
+  sisyphus: SisyphusConfigSchema.optional(),
+  /** Migration history to prevent re-applying migrations (e.g., model version upgrades) */
+  _migrations: z.array(z.string()).optional(),
+})
+
+export type OhMyOpenCodeConfig = z.infer<typeof OhMyOpenCodeConfigSchema>