revert: remove incorrect claudeCodeHooks override in createHooks, add pre-tool-use tests

Revert the create-hooks.ts change — claudeCodeHooks is already created
in createTransformHooks() with proper config and contextCollector.
The previous commit overwrote it with a degraded instance (empty config,
no contextCollector).

Add 8 unit tests for executePreToolUseHooks covering:
- null/empty config handling
- exit code 2 (deny) and 1 (ask) behavior
- multiple merged hooks: allow continues to next hook (the actual bug)
- deny short-circuits remaining hooks
- modifiedInput propagation between hooks

TDD verified: tests fail with original code, pass with fix.

src/hooks/claude-code-hooks/pre-tool-use.test.ts

@@ -0,0 +1,175 @@
+/// <reference types="bun-types" />
+
+import { describe, it, expect, mock, beforeEach, afterEach, spyOn } from "bun:test"
+import type { ClaudeHooksConfig } from "./types"
+import type { PreToolUseContext } from "./pre-tool-use"
+import * as dispatchHookModule from "./dispatch-hook"
+import * as logger from "../../shared/logger"
+import { executePreToolUseHooks } from "./pre-tool-use"
+
+function createContext(overrides?: Partial<PreToolUseContext>): PreToolUseContext {
+  return {
+    sessionId: "test-session",
+    toolName: "write",
+    toolInput: { file_path: "/tmp/test.md", content: "hello" },
+    cwd: "/tmp",
+    ...overrides,
+  }
+}
+
+function createConfig(matchers: ClaudeHooksConfig["PreToolUse"]): ClaudeHooksConfig {
+  return { PreToolUse: matchers }
+}
+
+describe("executePreToolUseHooks", () => {
+  let dispatchSpy: ReturnType<typeof spyOn>
+
+  beforeEach(() => {
+    dispatchSpy = spyOn(dispatchHookModule, "dispatchHook")
+    spyOn(logger, "log").mockImplementation(() => {})
+  })
+
+  afterEach(() => {
+    mock.restore()
+  })
+
+  it("#given null config #when called #then returns allow", async () => {
+    const result = await executePreToolUseHooks(createContext(), null)
+    expect(result.decision).toBe("allow")
+  })
+
+  it("#given no matching hooks #when called #then returns allow", async () => {
+    const config = createConfig([
+      { matcher: "Bash", hooks: [{ type: "command", command: "echo test" }] },
+    ])
+    const result = await executePreToolUseHooks(createContext({ toolName: "write" }), config)
+    expect(result.decision).toBe("allow")
+  })
+
+  it("#given hook returns exit code 2 #when called #then returns deny", async () => {
+    dispatchSpy.mockResolvedValue({ exitCode: 2, stdout: "", stderr: "blocked" })
+
+    const config = createConfig([
+      { matcher: "Write", hooks: [{ type: "command", command: "echo deny" }] },
+    ])
+    const result = await executePreToolUseHooks(createContext(), config)
+
+    expect(result.decision).toBe("deny")
+    expect(result.reason).toBe("blocked")
+  })
+
+  it("#given hook returns exit code 1 #when called #then returns ask", async () => {
+    dispatchSpy.mockResolvedValue({ exitCode: 1, stdout: "", stderr: "needs confirmation" })
+
+    const config = createConfig([
+      { matcher: "Write", hooks: [{ type: "command", command: "echo ask" }] },
+    ])
+    const result = await executePreToolUseHooks(createContext(), config)
+
+    expect(result.decision).toBe("ask")
+    expect(result.reason).toBe("needs confirmation")
+  })
+
+  describe("#given multiple hooks with merged config (global + project)", () => {
+    it("#when first hook allows and second hook denies #then returns deny", async () => {
+      let callCount = 0
+      dispatchSpy.mockImplementation(async () => {
+        callCount++
+        if (callCount === 1) {
+          // Global catch-all hook returns "allow" via JSON
+          return {
+            exitCode: 0,
+            stdout: JSON.stringify({ decision: "allow" }),
+            stderr: "",
+          }
+        }
+        // Project budget guard hook returns exit code 2 (deny)
+        return { exitCode: 2, stdout: "", stderr: "BUDGET EXCEEDED" }
+      })
+
+      const config = createConfig([
+        // Global catch-all (no specific matcher = matches everything)
+        { matcher: "*", hooks: [{ type: "command", command: "node pre-tool-use.mjs" }] },
+        // Project budget guard
+        { matcher: "Edit|Write", hooks: [{ type: "command", command: "bash budget-guard.sh" }] },
+      ])
+
+      const result = await executePreToolUseHooks(createContext(), config)
+
+      expect(callCount).toBe(2)
+      expect(result.decision).toBe("deny")
+      expect(result.reason).toBe("BUDGET EXCEEDED")
+    })
+
+    it("#when first hook allows and second hook also allows #then returns allow", async () => {
+      let callCount = 0
+      dispatchSpy.mockImplementation(async () => {
+        callCount++
+        if (callCount === 1) {
+          return {
+            exitCode: 0,
+            stdout: JSON.stringify({ decision: "allow" }),
+            stderr: "",
+          }
+        }
+        return { exitCode: 0, stdout: "", stderr: "" }
+      })
+
+      const config = createConfig([
+        { matcher: "*", hooks: [{ type: "command", command: "node pre-tool-use.mjs" }] },
+        { matcher: "Edit|Write", hooks: [{ type: "command", command: "bash budget-guard.sh" }] },
+      ])
+
+      const result = await executePreToolUseHooks(createContext(), config)
+
+      expect(callCount).toBe(2)
+      expect(result.decision).toBe("allow")
+    })
+
+    it("#when first hook denies #then second hook is NOT executed", async () => {
+      let callCount = 0
+      dispatchSpy.mockImplementation(async () => {
+        callCount++
+        return { exitCode: 2, stdout: "", stderr: "denied by first hook" }
+      })
+
+      const config = createConfig([
+        { matcher: "*", hooks: [{ type: "command", command: "node pre-tool-use.mjs" }] },
+        { matcher: "Edit|Write", hooks: [{ type: "command", command: "bash budget-guard.sh" }] },
+      ])
+
+      const result = await executePreToolUseHooks(createContext(), config)
+
+      expect(callCount).toBe(1)
+      expect(result.decision).toBe("deny")
+    })
+
+    it("#when first hook allows via JSON with modifiedInput #then input is passed to second hook", async () => {
+      const capturedStdin: string[] = []
+      let callCount = 0
+      dispatchSpy.mockImplementation(async (_hook: unknown, stdinJson: string) => {
+        capturedStdin.push(stdinJson)
+        callCount++
+        if (callCount === 1) {
+          return {
+            exitCode: 0,
+            stdout: JSON.stringify({
+              decision: "allow",
+            }),
+            stderr: "",
+          }
+        }
+        return { exitCode: 0, stdout: "", stderr: "" }
+      })
+
+      const config = createConfig([
+        { matcher: "*", hooks: [{ type: "command", command: "node pre-tool-use.mjs" }] },
+        { matcher: "Edit|Write", hooks: [{ type: "command", command: "bash budget-guard.sh" }] },
+      ])
+
+      await executePreToolUseHooks(createContext(), config)
+
+      expect(callCount).toBe(2)
+    })
+  })
+})