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/cli/config-manager/add-plugin-to-opencode-config.ts

@@ -0,0 +1,82 @@
+import { readFileSync, writeFileSync } from "node:fs"
+import type { ConfigMergeResult } from "../types"
+import { getConfigDir } from "./config-context"
+import { ensureConfigDirectoryExists } from "./ensure-config-directory-exists"
+import { formatErrorWithSuggestion } from "./format-error-with-suggestion"
+import { detectConfigFormat } from "./opencode-config-format"
+import { parseOpenCodeConfigFileWithError, type OpenCodeConfig } from "./parse-opencode-config-file"
+import { getPluginNameWithVersion } from "./plugin-name-with-version"
+
+const PACKAGE_NAME = "oh-my-opencode"
+
+export async function addPluginToOpenCodeConfig(currentVersion: string): Promise<ConfigMergeResult> {
+  try {
+    ensureConfigDirectoryExists()
+  } catch (err) {
+    return {
+      success: false,
+      configPath: getConfigDir(),
+      error: formatErrorWithSuggestion(err, "create config directory"),
+    }
+  }
+
+  const { format, path } = detectConfigFormat()
+  const pluginEntry = await getPluginNameWithVersion(currentVersion)
+
+  try {
+    if (format === "none") {
+      const config: OpenCodeConfig = { plugin: [pluginEntry] }
+      writeFileSync(path, JSON.stringify(config, null, 2) + "\n")
+      return { success: true, configPath: path }
+    }
+
+    const parseResult = parseOpenCodeConfigFileWithError(path)
+    if (!parseResult.config) {
+      return {
+        success: false,
+        configPath: path,
+        error: parseResult.error ?? "Failed to parse config file",
+      }
+    }
+
+    const config = parseResult.config
+    const plugins = config.plugin ?? []
+    const existingIndex = plugins.findIndex((p) => p === PACKAGE_NAME || p.startsWith(`${PACKAGE_NAME}@`))
+
+    if (existingIndex !== -1) {
+      if (plugins[existingIndex] === pluginEntry) {
+        return { success: true, configPath: path }
+      }
+      plugins[existingIndex] = pluginEntry
+    } else {
+      plugins.push(pluginEntry)
+    }
+
+    config.plugin = plugins
+
+    if (format === "jsonc") {
+      const content = readFileSync(path, "utf-8")
+      const pluginArrayRegex = /"plugin"\s*:\s*\[([\s\S]*?)\]/
+      const match = content.match(pluginArrayRegex)
+
+      if (match) {
+        const formattedPlugins = plugins.map((p) => `"${p}"`).join(",\n    ")
+        const newContent = content.replace(pluginArrayRegex, `"plugin": [\n    ${formattedPlugins}\n  ]`)
+        writeFileSync(path, newContent)
+      } else {
+        const newContent = content.replace(/^(\s*\{)/, `$1\n  "plugin": ["${pluginEntry}"],`)
+        writeFileSync(path, newContent)
+      }
+    } else {
+      writeFileSync(path, JSON.stringify(config, null, 2) + "\n")
+    }
+
+    return { success: true, configPath: path }
+  } catch (err) {
+    return {
+      success: false,
+      configPath: path,
+      error: formatErrorWithSuggestion(err, "update opencode config"),
+    }
+  }
+}

src/cli/config-manager/add-provider-config.ts

@@ -0,0 +1,54 @@
+import { writeFileSync } from "node:fs"
+import type { ConfigMergeResult, InstallConfig } from "../types"
+import { getConfigDir } from "./config-context"
+import { ensureConfigDirectoryExists } from "./ensure-config-directory-exists"
+import { formatErrorWithSuggestion } from "./format-error-with-suggestion"
+import { detectConfigFormat } from "./opencode-config-format"
+import { parseOpenCodeConfigFileWithError, type OpenCodeConfig } from "./parse-opencode-config-file"
+import { ANTIGRAVITY_PROVIDER_CONFIG } from "./antigravity-provider-configuration"
+
+export function addProviderConfig(config: InstallConfig): ConfigMergeResult {
+  try {
+    ensureConfigDirectoryExists()
+  } catch (err) {
+    return {
+      success: false,
+      configPath: getConfigDir(),
+      error: formatErrorWithSuggestion(err, "create config directory"),
+    }
+  }
+
+  const { format, path } = detectConfigFormat()
+
+  try {
+    let existingConfig: OpenCodeConfig | null = null
+    if (format !== "none") {
+      const parseResult = parseOpenCodeConfigFileWithError(path)
+      if (parseResult.error && !parseResult.config) {
+        existingConfig = {}
+      } else {
+        existingConfig = parseResult.config
+      }
+    }
+
+    const newConfig = { ...(existingConfig ?? {}) }
+    const providers = (newConfig.provider ?? {}) as Record<string, unknown>
+
+    if (config.hasGemini) {
+      providers.google = ANTIGRAVITY_PROVIDER_CONFIG.google
+    }
+
+    if (Object.keys(providers).length > 0) {
+      newConfig.provider = providers
+    }
+
+    writeFileSync(path, JSON.stringify(newConfig, null, 2) + "\n")
+    return { success: true, configPath: path }
+  } catch (err) {
+    return {
+      success: false,
+      configPath: path,
+      error: formatErrorWithSuggestion(err, "add provider config"),
+    }
+  }
+}

src/cli/config-manager/antigravity-provider-configuration.ts

@@ -0,0 +1,64 @@
+/**
+ * Antigravity Provider Configuration
+ *
+ * IMPORTANT: Model names MUST use `antigravity-` prefix for stability.
+ *
+ * Since opencode-antigravity-auth v1.3.0, models use a variant system:
+ * - `antigravity-gemini-3-pro` with variants: low, high
+ * - `antigravity-gemini-3-flash` with variants: minimal, low, medium, high
+ *
+ * Legacy tier-suffixed names (e.g., `antigravity-gemini-3-pro-high`) still work
+ * but variants are the recommended approach.
+ *
+ * @see https://github.com/NoeFabris/opencode-antigravity-auth#models
+ */
+export const ANTIGRAVITY_PROVIDER_CONFIG = {
+  google: {
+    name: "Google",
+    models: {
+      "antigravity-gemini-3-pro": {
+        name: "Gemini 3 Pro (Antigravity)",
+        limit: { context: 1048576, output: 65535 },
+        modalities: { input: ["text", "image", "pdf"], output: ["text"] },
+        variants: {
+          low: { thinkingLevel: "low" },
+          high: { thinkingLevel: "high" },
+        },
+      },
+      "antigravity-gemini-3-flash": {
+        name: "Gemini 3 Flash (Antigravity)",
+        limit: { context: 1048576, output: 65536 },
+        modalities: { input: ["text", "image", "pdf"], output: ["text"] },
+        variants: {
+          minimal: { thinkingLevel: "minimal" },
+          low: { thinkingLevel: "low" },
+          medium: { thinkingLevel: "medium" },
+          high: { thinkingLevel: "high" },
+        },
+      },
+      "antigravity-claude-sonnet-4-5": {
+        name: "Claude Sonnet 4.5 (Antigravity)",
+        limit: { context: 200000, output: 64000 },
+        modalities: { input: ["text", "image", "pdf"], output: ["text"] },
+      },
+      "antigravity-claude-sonnet-4-5-thinking": {
+        name: "Claude Sonnet 4.5 Thinking (Antigravity)",
+        limit: { context: 200000, output: 64000 },
+        modalities: { input: ["text", "image", "pdf"], output: ["text"] },
+        variants: {
+          low: { thinkingConfig: { thinkingBudget: 8192 } },
+          max: { thinkingConfig: { thinkingBudget: 32768 } },
+        },
+      },
+      "antigravity-claude-opus-4-5-thinking": {
+        name: "Claude Opus 4.5 Thinking (Antigravity)",
+        limit: { context: 200000, output: 64000 },
+        modalities: { input: ["text", "image", "pdf"], output: ["text"] },
+        variants: {
+          low: { thinkingConfig: { thinkingBudget: 8192 } },
+          max: { thinkingConfig: { thinkingBudget: 32768 } },
+        },
+      },
+    },
+  },
+}

src/cli/config-manager/auth-plugins.ts

@@ -0,0 +1,64 @@
+import { writeFileSync } from "node:fs"
+import type { ConfigMergeResult, InstallConfig } from "../types"
+import { getConfigDir } from "./config-context"
+import { ensureConfigDirectoryExists } from "./ensure-config-directory-exists"
+import { formatErrorWithSuggestion } from "./format-error-with-suggestion"
+import { detectConfigFormat } from "./opencode-config-format"
+import { parseOpenCodeConfigFileWithError, type OpenCodeConfig } from "./parse-opencode-config-file"
+
+export async function fetchLatestVersion(packageName: string): Promise<string | null> {
+  try {
+    const res = await fetch(`https://registry.npmjs.org/${packageName}/latest`)
+    if (!res.ok) return null
+    const data = (await res.json()) as { version: string }
+    return data.version
+  } catch {
+    return null
+  }
+}
+
+export async function addAuthPlugins(config: InstallConfig): Promise<ConfigMergeResult> {
+  try {
+    ensureConfigDirectoryExists()
+  } catch (err) {
+    return {
+      success: false,
+      configPath: getConfigDir(),
+      error: formatErrorWithSuggestion(err, "create config directory"),
+    }
+  }
+
+  const { format, path } = detectConfigFormat()
+
+  try {
+    let existingConfig: OpenCodeConfig | null = null
+    if (format !== "none") {
+      const parseResult = parseOpenCodeConfigFileWithError(path)
+      if (parseResult.error && !parseResult.config) {
+        existingConfig = {}
+      } else {
+        existingConfig = parseResult.config
+      }
+    }
+
+    const plugins: string[] = existingConfig?.plugin ?? []
+
+    if (config.hasGemini) {
+      const version = await fetchLatestVersion("opencode-antigravity-auth")
+      const pluginEntry = version ? `opencode-antigravity-auth@${version}` : "opencode-antigravity-auth"
+      if (!plugins.some((p) => p.startsWith("opencode-antigravity-auth"))) {
+        plugins.push(pluginEntry)
+      }
+    }
+
+    const newConfig = { ...(existingConfig ?? {}), plugin: plugins }
+    writeFileSync(path, JSON.stringify(newConfig, null, 2) + "\n")
+    return { success: true, configPath: path }
+  } catch (err) {
+    return {
+      success: false,
+      configPath: path,
+      error: formatErrorWithSuggestion(err, "add auth plugins to config"),
+    }
+  }
+}

src/cli/config-manager/bun-install.ts

@@ -0,0 +1,60 @@
+import { getConfigDir } from "./config-context"
+
+const BUN_INSTALL_TIMEOUT_SECONDS = 60
+const BUN_INSTALL_TIMEOUT_MS = BUN_INSTALL_TIMEOUT_SECONDS * 1000
+
+export interface BunInstallResult {
+  success: boolean
+  timedOut?: boolean
+  error?: string
+}
+
+export async function runBunInstall(): Promise<boolean> {
+  const result = await runBunInstallWithDetails()
+  return result.success
+}
+
+export async function runBunInstallWithDetails(): Promise<BunInstallResult> {
+  try {
+    const proc = Bun.spawn(["bun", "install"], {
+      cwd: getConfigDir(),
+      stdout: "pipe",
+      stderr: "pipe",
+    })
+
+    const timeoutPromise = new Promise<"timeout">((resolve) =>
+      setTimeout(() => resolve("timeout"), BUN_INSTALL_TIMEOUT_MS)
+    )
+    const exitPromise = proc.exited.then(() => "completed" as const)
+    const result = await Promise.race([exitPromise, timeoutPromise])
+
+    if (result === "timeout") {
+      try {
+        proc.kill()
+      } catch {
+        /* intentionally empty - process may have already exited */
+      }
+      return {
+        success: false,
+        timedOut: true,
+        error: `bun install timed out after ${BUN_INSTALL_TIMEOUT_SECONDS} seconds. Try running manually: cd ~/.config/opencode && bun i`,
+      }
+    }
+
+    if (proc.exitCode !== 0) {
+      const stderr = await new Response(proc.stderr).text()
+      return {
+        success: false,
+        error: stderr.trim() || `bun install failed with exit code ${proc.exitCode}`,
+      }
+    }
+
+    return { success: true }
+  } catch (err) {
+    const message = err instanceof Error ? err.message : String(err)
+    return {
+      success: false,
+      error: `bun install failed: ${message}. Is bun installed? Try: curl -fsSL https://bun.sh/install | bash`,
+    }
+  }
+}

src/cli/config-manager/config-context.ts

@@ -0,0 +1,46 @@
+import { getOpenCodeConfigPaths } from "../../shared"
+import type {
+  OpenCodeBinaryType,
+  OpenCodeConfigPaths,
+} from "../../shared/opencode-config-dir-types"
+
+export interface ConfigContext {
+  binary: OpenCodeBinaryType
+  version: string | null
+  paths: OpenCodeConfigPaths
+}
+
+let configContext: ConfigContext | null = null
+
+export function initConfigContext(binary: OpenCodeBinaryType, version: string | null): void {
+  const paths = getOpenCodeConfigPaths({ binary, version })
+  configContext = { binary, version, paths }
+}
+
+export function getConfigContext(): ConfigContext {
+  if (!configContext) {
+    const paths = getOpenCodeConfigPaths({ binary: "opencode", version: null })
+    configContext = { binary: "opencode", version: null, paths }
+  }
+  return configContext
+}
+
+export function resetConfigContext(): void {
+  configContext = null
+}
+
+export function getConfigDir(): string {
+  return getConfigContext().paths.configDir
+}
+
+export function getConfigJson(): string {
+  return getConfigContext().paths.configJson
+}
+
+export function getConfigJsonc(): string {
+  return getConfigContext().paths.configJsonc
+}
+
+export function getOmoConfigPath(): string {
+  return getConfigContext().paths.omoConfig
+}

src/cli/config-manager/deep-merge-record.ts

@@ -0,0 +1,29 @@
+export function deepMergeRecord<TTarget extends Record<string, unknown>>(
+  target: TTarget,
+  source: Partial<TTarget>
+): TTarget {
+  const result: TTarget = { ...target }
+
+  for (const key of Object.keys(source) as Array<keyof TTarget>) {
+    const sourceValue = source[key]
+    const targetValue = result[key]
+
+    if (
+      sourceValue !== null &&
+      typeof sourceValue === "object" &&
+      !Array.isArray(sourceValue) &&
+      targetValue !== null &&
+      typeof targetValue === "object" &&
+      !Array.isArray(targetValue)
+    ) {
+      result[key] = deepMergeRecord(
+        targetValue as Record<string, unknown>,
+        sourceValue as Record<string, unknown>
+      ) as TTarget[keyof TTarget]
+    } else if (sourceValue !== undefined) {
+      result[key] = sourceValue as TTarget[keyof TTarget]
+    }
+  }
+
+  return result
+}

src/cli/config-manager/detect-current-config.ts

@@ -0,0 +1,78 @@
+import { existsSync, readFileSync } from "node:fs"
+import { parseJsonc } from "../../shared"
+import type { DetectedConfig } from "../types"
+import { getOmoConfigPath } from "./config-context"
+import { detectConfigFormat } from "./opencode-config-format"
+import { parseOpenCodeConfigFileWithError } from "./parse-opencode-config-file"
+
+function detectProvidersFromOmoConfig(): {
+  hasOpenAI: boolean
+  hasOpencodeZen: boolean
+  hasZaiCodingPlan: boolean
+  hasKimiForCoding: boolean
+} {
+  const omoConfigPath = getOmoConfigPath()
+  if (!existsSync(omoConfigPath)) {
+    return { hasOpenAI: true, hasOpencodeZen: true, hasZaiCodingPlan: false, hasKimiForCoding: false }
+  }
+
+  try {
+    const content = readFileSync(omoConfigPath, "utf-8")
+    const omoConfig = parseJsonc<Record<string, unknown>>(content)
+    if (!omoConfig || typeof omoConfig !== "object") {
+      return { hasOpenAI: true, hasOpencodeZen: true, hasZaiCodingPlan: false, hasKimiForCoding: false }
+    }
+
+    const configStr = JSON.stringify(omoConfig)
+    const hasOpenAI = configStr.includes('"openai/')
+    const hasOpencodeZen = configStr.includes('"opencode/')
+    const hasZaiCodingPlan = configStr.includes('"zai-coding-plan/')
+    const hasKimiForCoding = configStr.includes('"kimi-for-coding/')
+
+    return { hasOpenAI, hasOpencodeZen, hasZaiCodingPlan, hasKimiForCoding }
+  } catch {
+    return { hasOpenAI: true, hasOpencodeZen: true, hasZaiCodingPlan: false, hasKimiForCoding: false }
+  }
+}
+
+export function detectCurrentConfig(): DetectedConfig {
+  const result: DetectedConfig = {
+    isInstalled: false,
+    hasClaude: true,
+    isMax20: true,
+    hasOpenAI: true,
+    hasGemini: false,
+    hasCopilot: false,
+    hasOpencodeZen: true,
+    hasZaiCodingPlan: false,
+    hasKimiForCoding: false,
+  }
+
+  const { format, path } = detectConfigFormat()
+  if (format === "none") {
+    return result
+  }
+
+  const parseResult = parseOpenCodeConfigFileWithError(path)
+  if (!parseResult.config) {
+    return result
+  }
+
+  const openCodeConfig = parseResult.config
+  const plugins = openCodeConfig.plugin ?? []
+  result.isInstalled = plugins.some((p) => p.startsWith("oh-my-opencode"))
+
+  if (!result.isInstalled) {
+    return result
+  }
+
+  result.hasGemini = plugins.some((p) => p.startsWith("opencode-antigravity-auth"))
+
+  const { hasOpenAI, hasOpencodeZen, hasZaiCodingPlan, hasKimiForCoding } = detectProvidersFromOmoConfig()
+  result.hasOpenAI = hasOpenAI
+  result.hasOpencodeZen = hasOpencodeZen
+  result.hasZaiCodingPlan = hasZaiCodingPlan
+  result.hasKimiForCoding = hasKimiForCoding
+
+  return result
+}

src/cli/config-manager/ensure-config-directory-exists.ts

@@ -0,0 +1,9 @@
+import { existsSync, mkdirSync } from "node:fs"
+import { getConfigDir } from "./config-context"
+
+export function ensureConfigDirectoryExists(): void {
+  const configDir = getConfigDir()
+  if (!existsSync(configDir)) {
+    mkdirSync(configDir, { recursive: true })
+  }
+}

src/cli/config-manager/format-error-with-suggestion.ts

@@ -0,0 +1,39 @@
+interface NodeError extends Error {
+  code?: string
+}
+
+function isPermissionError(err: unknown): boolean {
+  const nodeErr = err as NodeError
+  return nodeErr?.code === "EACCES" || nodeErr?.code === "EPERM"
+}
+
+function isFileNotFoundError(err: unknown): boolean {
+  const nodeErr = err as NodeError
+  return nodeErr?.code === "ENOENT"
+}
+
+export function formatErrorWithSuggestion(err: unknown, context: string): string {
+  if (isPermissionError(err)) {
+    return `Permission denied: Cannot ${context}. Try running with elevated permissions or check file ownership.`
+  }
+
+  if (isFileNotFoundError(err)) {
+    return `File not found while trying to ${context}. The file may have been deleted or moved.`
+  }
+
+  if (err instanceof SyntaxError) {
+    return `JSON syntax error while trying to ${context}: ${err.message}. Check for missing commas, brackets, or invalid characters.`
+  }
+
+  const message = err instanceof Error ? err.message : String(err)
+
+  if (message.includes("ENOSPC")) {
+    return `Disk full: Cannot ${context}. Free up disk space and try again.`
+  }
+
+  if (message.includes("EROFS")) {
+    return `Read-only filesystem: Cannot ${context}. Check if the filesystem is mounted read-only.`
+  }
+
+  return `Failed to ${context}: ${message}`
+}

src/cli/config-manager/generate-omo-config.ts

@@ -0,0 +1,6 @@
+import type { InstallConfig } from "../types"
+import { generateModelConfig } from "../model-fallback"
+
+export function generateOmoConfig(installConfig: InstallConfig): Record<string, unknown> {
+  return generateModelConfig(installConfig)
+}

src/cli/config-manager/npm-dist-tags.ts

@@ -0,0 +1,21 @@
+export interface NpmDistTags {
+  latest?: string
+  beta?: string
+  next?: string
+  [tag: string]: string | undefined
+}
+
+const NPM_FETCH_TIMEOUT_MS = 5000
+
+export async function fetchNpmDistTags(packageName: string): Promise<NpmDistTags | null> {
+  try {
+    const res = await fetch(`https://registry.npmjs.org/-/package/${packageName}/dist-tags`, {
+      signal: AbortSignal.timeout(NPM_FETCH_TIMEOUT_MS),
+    })
+    if (!res.ok) return null
+    const data = (await res.json()) as NpmDistTags
+    return data
+  } catch {
+    return null
+  }
+}

src/cli/config-manager/opencode-binary.ts

@@ -0,0 +1,40 @@
+import type { OpenCodeBinaryType } from "../../shared/opencode-config-dir-types"
+import { initConfigContext } from "./config-context"
+
+const OPENCODE_BINARIES = ["opencode", "opencode-desktop"] as const
+
+interface OpenCodeBinaryResult {
+  binary: OpenCodeBinaryType
+  version: string
+}
+
+async function findOpenCodeBinaryWithVersion(): Promise<OpenCodeBinaryResult | null> {
+  for (const binary of OPENCODE_BINARIES) {
+    try {
+      const proc = Bun.spawn([binary, "--version"], {
+        stdout: "pipe",
+        stderr: "pipe",
+      })
+      const output = await new Response(proc.stdout).text()
+      await proc.exited
+      if (proc.exitCode === 0) {
+        const version = output.trim()
+        initConfigContext(binary, version)
+        return { binary, version }
+      }
+    } catch {
+      continue
+    }
+  }
+  return null
+}
+
+export async function isOpenCodeInstalled(): Promise<boolean> {
+  const result = await findOpenCodeBinaryWithVersion()
+  return result !== null
+}
+
+export async function getOpenCodeVersion(): Promise<string | null> {
+  const result = await findOpenCodeBinaryWithVersion()
+  return result?.version ?? null
+}

src/cli/config-manager/opencode-config-format.ts

@@ -0,0 +1,17 @@
+import { existsSync } from "node:fs"
+import { getConfigJson, getConfigJsonc } from "./config-context"
+
+export type ConfigFormat = "json" | "jsonc" | "none"
+
+export function detectConfigFormat(): { format: ConfigFormat; path: string } {
+  const configJsonc = getConfigJsonc()
+  const configJson = getConfigJson()
+
+  if (existsSync(configJsonc)) {
+    return { format: "jsonc", path: configJsonc }
+  }
+  if (existsSync(configJson)) {
+    return { format: "json", path: configJson }
+  }
+  return { format: "none", path: configJson }
+}

src/cli/config-manager/parse-opencode-config-file.ts

@@ -0,0 +1,48 @@
+import { readFileSync, statSync } from "node:fs"
+import { parseJsonc } from "../../shared"
+import { formatErrorWithSuggestion } from "./format-error-with-suggestion"
+
+interface ParseConfigResult {
+  config: OpenCodeConfig | null
+  error?: string
+}
+
+export interface OpenCodeConfig {
+  plugin?: string[]
+  [key: string]: unknown
+}
+
+function isEmptyOrWhitespace(content: string): boolean {
+  return content.trim().length === 0
+}
+
+export function parseOpenCodeConfigFileWithError(path: string): ParseConfigResult {
+  try {
+    const stat = statSync(path)
+    if (stat.size === 0) {
+      return { config: null, error: `Config file is empty: ${path}. Delete it or add valid JSON content.` }
+    }
+
+    const content = readFileSync(path, "utf-8")
+    if (isEmptyOrWhitespace(content)) {
+      return { config: null, error: `Config file contains only whitespace: ${path}. Delete it or add valid JSON content.` }
+    }
+
+    const config = parseJsonc<OpenCodeConfig>(content)
+
+    if (config === null || config === undefined) {
+      return { config: null, error: `Config file parsed to null/undefined: ${path}. Ensure it contains valid JSON.` }
+    }
+
+    if (typeof config !== "object" || Array.isArray(config)) {
+      return {
+        config: null,
+        error: `Config file must contain a JSON object, not ${Array.isArray(config) ? "an array" : typeof config}: ${path}`,
+      }
+    }
+
+    return { config }
+  } catch (err) {
+    return { config: null, error: formatErrorWithSuggestion(err, `parse config file ${path}`) }
+  }
+}

src/cli/config-manager/plugin-name-with-version.ts

@@ -0,0 +1,19 @@
+import { fetchNpmDistTags } from "./npm-dist-tags"
+
+const PACKAGE_NAME = "oh-my-opencode"
+const PRIORITIZED_TAGS = ["latest", "beta", "next"] as const
+
+export async function getPluginNameWithVersion(currentVersion: string): Promise<string> {
+  const distTags = await fetchNpmDistTags(PACKAGE_NAME)
+
+  if (distTags) {
+    const allTags = new Set([...PRIORITIZED_TAGS, ...Object.keys(distTags)])
+    for (const tag of allTags) {
+      if (distTags[tag] === currentVersion) {
+        return `${PACKAGE_NAME}@${tag}`
+      }
+    }
+  }
+
+  return `${PACKAGE_NAME}@${currentVersion}`
+}

src/cli/config-manager/write-omo-config.ts

@@ -0,0 +1,67 @@
+import { existsSync, readFileSync, statSync, writeFileSync } from "node:fs"
+import { parseJsonc } from "../../shared"
+import type { ConfigMergeResult, InstallConfig } from "../types"
+import { getConfigDir, getOmoConfigPath } from "./config-context"
+import { deepMergeRecord } from "./deep-merge-record"
+import { ensureConfigDirectoryExists } from "./ensure-config-directory-exists"
+import { formatErrorWithSuggestion } from "./format-error-with-suggestion"
+import { generateOmoConfig } from "./generate-omo-config"
+
+function isEmptyOrWhitespace(content: string): boolean {
+  return content.trim().length === 0
+}
+
+export function writeOmoConfig(installConfig: InstallConfig): ConfigMergeResult {
+  try {
+    ensureConfigDirectoryExists()
+  } catch (err) {
+    return {
+      success: false,
+      configPath: getConfigDir(),
+      error: formatErrorWithSuggestion(err, "create config directory"),
+    }
+  }
+
+  const omoConfigPath = getOmoConfigPath()
+
+  try {
+    const newConfig = generateOmoConfig(installConfig)
+
+    if (existsSync(omoConfigPath)) {
+      try {
+        const stat = statSync(omoConfigPath)
+        const content = readFileSync(omoConfigPath, "utf-8")
+
+        if (stat.size === 0 || isEmptyOrWhitespace(content)) {
+          writeFileSync(omoConfigPath, JSON.stringify(newConfig, null, 2) + "\n")
+          return { success: true, configPath: omoConfigPath }
+        }
+
+        const existing = parseJsonc<Record<string, unknown>>(content)
+        if (!existing || typeof existing !== "object" || Array.isArray(existing)) {
+          writeFileSync(omoConfigPath, JSON.stringify(newConfig, null, 2) + "\n")
+          return { success: true, configPath: omoConfigPath }
+        }
+
+        const merged = deepMergeRecord(existing, newConfig)
+        writeFileSync(omoConfigPath, JSON.stringify(merged, null, 2) + "\n")
+      } catch (parseErr) {
+        if (parseErr instanceof SyntaxError) {
+          writeFileSync(omoConfigPath, JSON.stringify(newConfig, null, 2) + "\n")
+          return { success: true, configPath: omoConfigPath }
+        }
+        throw parseErr
+      }
+    } else {
+      writeFileSync(omoConfigPath, JSON.stringify(newConfig, null, 2) + "\n")
+    }
+
+    return { success: true, configPath: omoConfigPath }
+  } catch (err) {
+    return {
+      success: false,
+      configPath: omoConfigPath,
+      error: formatErrorWithSuggestion(err, "write oh-my-opencode config"),
+    }
+  }
+}