feat(hooks): add UserPromptSubmit and Stop executors

- Port user-prompt-submit.ts from opencode-cc-plugin (118 lines)
- Port stop.ts from opencode-cc-plugin (119 lines)
- Preserve recursion prevention logic (<user-prompt-submit-hook> tags)
- Preserve inject_prompt support (message injection, stop prompt injection)
- Preserve stopHookActiveState management (per-session state)
- Import path adjustments: ../types → ./types, ../../config → ./plugin-config
- All exit code handling preserved (exitCode 2 → block, etc.)

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/hooks/claude-code-hooks/user-prompt-submit.ts

@@ -0,0 +1,117 @@
+import type {
+  UserPromptSubmitInput,
+  PostToolUseOutput,
+  ClaudeHooksConfig,
+} from "./types"
+import { findMatchingHooks, executeHookCommand, log } from "../../shared"
+import { DEFAULT_CONFIG } from "./plugin-config"
+import { isHookCommandDisabled, type PluginExtendedConfig } from "./config-loader"
+
+const USER_PROMPT_SUBMIT_TAG_OPEN = "<user-prompt-submit-hook>"
+const USER_PROMPT_SUBMIT_TAG_CLOSE = "</user-prompt-submit-hook>"
+
+export interface MessagePart {
+  type: "text" | "tool_use" | "tool_result"
+  text?: string
+  [key: string]: unknown
+}
+
+export interface UserPromptSubmitContext {
+  sessionId: string
+  parentSessionId?: string
+  prompt: string
+  parts: MessagePart[]
+  cwd: string
+  permissionMode?: "default" | "acceptEdits" | "bypassPermissions"
+}
+
+export interface UserPromptSubmitResult {
+  block: boolean
+  reason?: string
+  modifiedParts: MessagePart[]
+  messages: string[]
+}
+
+export async function executeUserPromptSubmitHooks(
+  ctx: UserPromptSubmitContext,
+  config: ClaudeHooksConfig | null,
+  extendedConfig?: PluginExtendedConfig | null
+): Promise<UserPromptSubmitResult> {
+  const modifiedParts = ctx.parts
+  const messages: string[] = []
+
+  if (ctx.parentSessionId) {
+    return { block: false, modifiedParts, messages }
+  }
+
+  if (
+    ctx.prompt.includes(USER_PROMPT_SUBMIT_TAG_OPEN) &&
+    ctx.prompt.includes(USER_PROMPT_SUBMIT_TAG_CLOSE)
+  ) {
+    return { block: false, modifiedParts, messages }
+  }
+
+  if (!config) {
+    return { block: false, modifiedParts, messages }
+  }
+
+  const matchers = findMatchingHooks(config, "UserPromptSubmit")
+  if (matchers.length === 0) {
+    return { block: false, modifiedParts, messages }
+  }
+
+  const stdinData: UserPromptSubmitInput = {
+    session_id: ctx.sessionId,
+    cwd: ctx.cwd,
+    permission_mode: ctx.permissionMode ?? "bypassPermissions",
+    hook_event_name: "UserPromptSubmit",
+    prompt: ctx.prompt,
+    session: { id: ctx.sessionId },
+    hook_source: "opencode-plugin",
+  }
+
+  for (const matcher of matchers) {
+    for (const hook of matcher.hooks) {
+      if (hook.type !== "command") continue
+
+      if (isHookCommandDisabled("UserPromptSubmit", hook.command, extendedConfig ?? null)) {
+        log("UserPromptSubmit hook command skipped (disabled by config)", { command: hook.command })
+        continue
+      }
+
+      const result = await executeHookCommand(
+        hook.command,
+        JSON.stringify(stdinData),
+        ctx.cwd,
+        { forceZsh: DEFAULT_CONFIG.forceZsh, zshPath: DEFAULT_CONFIG.zshPath }
+      )
+
+      if (result.stdout) {
+        const output = result.stdout.trim()
+        if (output.startsWith(USER_PROMPT_SUBMIT_TAG_OPEN)) {
+          messages.push(output)
+        } else {
+          messages.push(`${USER_PROMPT_SUBMIT_TAG_OPEN}\n${output}\n${USER_PROMPT_SUBMIT_TAG_CLOSE}`)
+        }
+      }
+
+      if (result.exitCode !== 0) {
+        try {
+          const output = JSON.parse(result.stdout || "{}") as PostToolUseOutput
+          if (output.decision === "block") {
+            return {
+              block: true,
+              reason: output.reason || result.stderr,
+              modifiedParts,
+              messages,
+            }
+          }
+         } catch {
+          // Ignore JSON parse errors
+         }
+      }
+    }
+  }
+
+  return { block: false, modifiedParts, messages }
+}