fix: align SkillTool schema error output

src/entrypoints/cli.tsx

@@ -8,34 +8,6 @@ import {
   validateProviderEnvOrExit,
 } from '../utils/providerValidation.js'
 
-// OpenClaude: polyfill globalThis.File for Node < 20.
-// undici v7 references `File` at module evaluation time (webidl type
-// assertions). Node 18 lacks the global, causing a ReferenceError inside
-// the bundled __commonJS require chain which deadlocks the process when a
-// proxy is configured (configureGlobalAgents → require_undici).
-// eslint-disable-next-line custom-rules/no-top-level-side-effects
-if (typeof globalThis.File === 'undefined') {
-  try {
-    // Node 18.13+ exposes File in node:buffer but not as a global.
-    // eslint-disable-next-line @typescript-eslint/no-require-imports
-    const { File: NodeFile } = require('node:buffer')
-    // @ts-expect-error -- polyfilling missing global
-    globalThis.File = NodeFile
-  } catch {
-    // Absolute fallback: stub so `MakeTypeAssertion(File)` doesn't throw.
-    // @ts-expect-error -- minimal polyfill
-    globalThis.File = class File extends Blob {
-      name: string
-      lastModified: number
-      constructor(parts: BlobPart[], name: string, opts?: FilePropertyBag) {
-        super(parts, opts)
-        this.name = name
-        this.lastModified = opts?.lastModified ?? Date.now()
-      }
-    }
-  }
-}
-
 // OpenClaude: disable experimental API betas by default.
 // Tool search (defer_loading), global cache scope, and context management
 // require internal API support not available to external accounts → 500.

src/services/api/codexShim.test.ts

@@ -201,117 +201,6 @@ describe('Codex request translation', () => {
     ])
   })
 
-  test('preserves Grep tool pattern field in Codex strict schemas', () => {
-    const tools = convertToolsToResponsesTools([
-      {
-        name: 'Grep',
-        description: 'Search file contents',
-        input_schema: {
-          type: 'object',
-          properties: {
-            pattern: { type: 'string', description: 'Search pattern' },
-            path: { type: 'string' },
-          },
-          required: ['pattern'],
-          additionalProperties: false,
-        },
-      },
-    ])
-
-    expect(tools).toEqual([
-      {
-        type: 'function',
-        name: 'Grep',
-        description: 'Search file contents',
-        parameters: {
-          type: 'object',
-          properties: {
-            pattern: { type: 'string', description: 'Search pattern' },
-            path: { type: 'string' },
-          },
-          required: ['pattern', 'path'],
-          additionalProperties: false,
-        },
-        strict: true,
-      },
-    ])
-  })
-
-  test('preserves Glob tool pattern field in Codex strict schemas', () => {
-    const tools = convertToolsToResponsesTools([
-      {
-        name: 'Glob',
-        description: 'Find files by pattern',
-        input_schema: {
-          type: 'object',
-          properties: {
-            pattern: { type: 'string', description: 'Glob pattern' },
-            path: { type: 'string' },
-          },
-          required: ['pattern'],
-          additionalProperties: false,
-        },
-      },
-    ])
-
-    expect(tools).toEqual([
-      {
-        type: 'function',
-        name: 'Glob',
-        description: 'Find files by pattern',
-        parameters: {
-          type: 'object',
-          properties: {
-            pattern: { type: 'string', description: 'Glob pattern' },
-            path: { type: 'string' },
-          },
-          required: ['pattern', 'path'],
-          additionalProperties: false,
-        },
-        strict: true,
-      },
-    ])
-  })
-
-  test('strips validator pattern keyword but keeps string field named pattern in Codex schemas', () => {
-    const tools = convertToolsToResponsesTools([
-      {
-        name: 'RegexProbe',
-        description: 'Probe regex schema handling',
-        input_schema: {
-          type: 'object',
-          properties: {
-            pattern: {
-              type: 'string',
-              pattern: '^[a-z]+$',
-            },
-          },
-          required: ['pattern'],
-          additionalProperties: false,
-        },
-      },
-    ])
-
-    expect(tools).toEqual([
-      {
-        type: 'function',
-        name: 'RegexProbe',
-        description: 'Probe regex schema handling',
-        parameters: {
-          type: 'object',
-          properties: {
-            pattern: {
-              type: 'string',
-            },
-          },
-          required: ['pattern'],
-          additionalProperties: false,
-        },
-        strict: true,
-      },
-    ])
-  })
-
   test('removes unsupported uri format from strict Responses schemas', () => {
     const tools = convertToolsToResponsesTools([
       {

src/services/api/openaiShim.test.ts

@@ -261,73 +261,6 @@ test('preserves Gemini tool call extra_content in follow-up requests', async ()
   })
 })
 
-test('preserves Grep tool pattern field in OpenAI-compatible schemas', async () => {
-  let requestBody: Record<string, unknown> | undefined
-
-  globalThis.fetch = (async (_input, init) => {
-    requestBody = JSON.parse(String(init?.body))
-
-    return new Response(
-      JSON.stringify({
-        id: 'chatcmpl-grep-schema',
-        model: 'qwen/qwen3.6-plus',
-        choices: [
-          {
-            message: {
-              role: 'assistant',
-              content: 'done',
-            },
-            finish_reason: 'stop',
-          },
-        ],
-        usage: {
-          prompt_tokens: 12,
-          completion_tokens: 4,
-          total_tokens: 16,
-        },
-      }),
-      {
-        headers: {
-          'Content-Type': 'application/json',
-        },
-      },
-    )
-  }) as FetchType
-
-  const client = createOpenAIShimClient({}) as OpenAIShimClient
-
-  await client.beta.messages.create({
-    model: 'qwen/qwen3.6-plus',
-    system: 'test system',
-    messages: [{ role: 'user', content: 'Use Grep' }],
-    tools: [
-      {
-        name: 'Grep',
-        description: 'Search file contents',
-        input_schema: {
-          type: 'object',
-          properties: {
-            pattern: { type: 'string', description: 'Search pattern' },
-            path: { type: 'string' },
-          },
-          required: ['pattern'],
-          additionalProperties: false,
-        },
-      },
-    ],
-    max_tokens: 64,
-    stream: false,
-  })
-
-  const tools = requestBody?.tools as Array<Record<string, unknown>> | undefined
-  const grepTool = tools?.find(tool => (tool.function as Record<string, unknown>)?.name === 'Grep') as
-    | { function?: { parameters?: { properties?: Record<string, unknown>; required?: string[] } } }
-    | undefined
-
-  expect(Object.keys(grepTool?.function?.parameters?.properties ?? {})).toContain('pattern')
-  expect(grepTool?.function?.parameters?.required).toContain('pattern')
-})
-
 test('does not infer Gemini mode from OPENAI_BASE_URL path substrings', async () => {
   let capturedAuthorization: string | null = null
 

src/services/api/openaiShim.ts

@@ -195,12 +195,10 @@ function convertContentBlocks(
         // handled separately
         break
       case 'thinking':
-      case 'redacted_thinking':
+        // Append thinking as text with a marker for models that support reasoning
-        // Strip thinking blocks for OpenAI-compatible providers.
+        if (block.thinking) {
-        // These are Anthropic-specific content types that 3P providers
+          parts.push({ type: 'text', text: `<thinking>${block.thinking}</thinking>` })
-        // don't understand. Serializing them as <thinking> text corrupts
+        }
-        // multi-turn context: the model sees the tags as part of its
-        // previous reply and may mimic or misattribute them.
         break
       default:
         if (block.text) {

src/services/tools/toolExecution.test.ts

@@ -0,0 +1,33 @@
+import { describe, expect, test } from 'bun:test'
+
+import { SkillTool } from '../../tools/SkillTool/SkillTool.js'
+import {
+  getSchemaValidationErrorOverride,
+  getSchemaValidationToolUseResult,
+} from './toolExecution.js'
+
+describe('getSchemaValidationErrorOverride', () => {
+  test('returns actionable missing-skill error for SkillTool', () => {
+    expect(getSchemaValidationErrorOverride(SkillTool, {})).toBe(
+      'Missing skill name. Pass the slash command name as the skill parameter (e.g., skill: "commit" for /commit, skill: "review-pr" for /review-pr).',
+    )
+  })
+
+  test('does not override unrelated tool schema failures', () => {
+    expect(getSchemaValidationErrorOverride({ name: 'Read' } as never, {})).toBe(
+      null,
+    )
+  })
+
+  test('does not override SkillTool when skill is present', () => {
+    expect(
+      getSchemaValidationErrorOverride(SkillTool, { skill: 'commit' }),
+    ).toBe(null)
+  })
+
+  test('uses the actionable override for structured toolUseResult too', () => {
+    expect(getSchemaValidationToolUseResult(SkillTool, {} as never)).toBe(
+      'InputValidationError: Missing skill name. Pass the slash command name as the skill parameter (e.g., skill: "commit" for /commit, skill: "review-pr" for /review-pr).',
+    )
+  })
+})

src/services/tools/toolExecution.ts

@@ -43,6 +43,7 @@ import { FILE_READ_TOOL_NAME } from '../../tools/FileReadTool/prompt.js'
 import { FILE_WRITE_TOOL_NAME } from '../../tools/FileWriteTool/prompt.js'
 import { NOTEBOOK_EDIT_TOOL_NAME } from '../../tools/NotebookEditTool/constants.js'
 import { POWERSHELL_TOOL_NAME } from '../../tools/PowerShellTool/toolName.js'
+import { SKILL_TOOL_NAME } from '../../tools/SkillTool/constants.js'
 import { parseGitCommitId } from '../../tools/shared/gitOperationTracking.js'
 import {
   isDeferredTool,
@@ -596,6 +597,31 @@ export function buildSchemaNotSentHint(
   )
 }
 
+export function getSchemaValidationErrorOverride(
+  tool: Tool,
+  input: unknown,
+): string | null {
+  if (tool.name !== SKILL_TOOL_NAME || !input || typeof input !== 'object') {
+    return null
+  }
+
+  const skill = (input as { skill?: unknown }).skill
+  if (skill === undefined || skill === null) {
+    return 'Missing skill name. Pass the slash command name as the skill parameter (e.g., skill: "commit" for /commit, skill: "review-pr" for /review-pr).'
+  }
+
+  return null
+}
+
+export function getSchemaValidationToolUseResult(
+  tool: Tool,
+  input: unknown,
+  fallbackMessage?: string,
+): string {
+  const override = getSchemaValidationErrorOverride(tool, input)
+  return `InputValidationError: ${override ?? fallbackMessage ?? ''}`
+}
+
 async function checkPermissionsAndCallTool(
   tool: Tool,
   toolUseID: string,
@@ -614,7 +640,9 @@ async function checkPermissionsAndCallTool(
   // Validate input types with zod (surprisingly, the model is not great at generating valid input)
   const parsedInput = tool.inputSchema.safeParse(input)
   if (!parsedInput.success) {
-    let errorContent = formatZodValidationError(tool.name, parsedInput.error)
+    const fallbackErrorContent = formatZodValidationError(tool.name, parsedInput.error)
+    let errorContent =
+      getSchemaValidationErrorOverride(tool, input) ?? fallbackErrorContent
 
     const schemaHint = buildSchemaNotSentHint(
       tool,
@@ -672,7 +700,11 @@ async function checkPermissionsAndCallTool(
               tool_use_id: toolUseID,
             },
           ],
-          toolUseResult: `InputValidationError: ${parsedInput.error.message}`,
+          toolUseResult: getSchemaValidationToolUseResult(
+            tool,
+            input,
+            parsedInput.error.message,
+          ),
           sourceToolAssistantUUID: assistantMessage.uuid,
         }),
       },

src/tools/SkillTool/SkillTool.test.ts

@@ -0,0 +1,31 @@
+import { describe, expect, test } from 'bun:test'
+
+import { SkillTool } from './SkillTool.js'
+
+describe('SkillTool missing parameter handling', () => {
+  test('missing skill stays required at the schema level', async () => {
+    const parsed = SkillTool.inputSchema.safeParse({})
+
+    expect(parsed.success).toBe(false)
+  })
+
+  test('validateInput still returns an actionable error when called with missing skill', async () => {
+    const result = await SkillTool.validateInput?.({} as never, {
+      options: { tools: [] },
+      messages: [],
+    } as never)
+
+    expect(result).toEqual({
+      result: false,
+      message:
+        'Missing skill name. Pass the slash command name as the skill parameter (e.g., skill: "commit" for /commit, skill: "review-pr" for /review-pr).',
+      errorCode: 1,
+    })
+  })
+
+  test('valid skill input still parses and validates', async () => {
+    const parsed = SkillTool.inputSchema.safeParse({ skill: 'commit' })
+
+    expect(parsed.success).toBe(true)
+  })
+})

src/tools/SkillTool/SkillTool.ts

@@ -352,6 +352,16 @@ export const SkillTool: Tool<InputSchema, Output, Progress> = buildTool({
   toAutoClassifierInput: ({ skill }) => skill ?? '',
 
   async validateInput({ skill }, context): Promise<ValidationResult> {
+    if (!skill || typeof skill !== 'string') {
+      return {
+        result: false,
+        message:
+          'Missing skill name. Pass the slash command name as the skill parameter ' +
+          '(e.g., skill: "commit" for /commit, skill: "review-pr" for /review-pr).',
+        errorCode: 1,
+      }
+    }
+
     // Skills are just skill names, no arguments
     const trimmed = skill.trim()
     if (!trimmed) {
@@ -434,7 +444,7 @@ export const SkillTool: Tool<InputSchema, Output, Progress> = buildTool({
     context,
   ): Promise<PermissionDecision> {
     // Skills are just skill names, no arguments
-    const trimmed = skill.trim()
+    const trimmed = skill ?? ''
 
     // Remove leading slash if present (for compatibility)
     const commandName = trimmed.startsWith('/') ? trimmed.substring(1) : trimmed
@@ -592,7 +602,7 @@ export const SkillTool: Tool<InputSchema, Output, Progress> = buildTool({
     // - Skill is a prompt-based skill
 
     // Skills are just names, with optional arguments
-    const trimmed = skill.trim()
+    const trimmed = skill ?? ''
 
     // Remove leading slash if present (for compatibility)
     const commandName = trimmed.startsWith('/') ? trimmed.substring(1) : trimmed

src/utils/api.test.ts

@@ -1,6 +1,7 @@
 import { expect, test } from 'bun:test'
 import { z } from 'zod/v4'
 import { getEmptyToolPermissionContext, type Tool, type Tools } from '../Tool.js'
+import { SkillTool } from '../tools/SkillTool/SkillTool.js'
 import { toolToAPISchema } from './api.js'
 
 test('toolToAPISchema preserves provider-specific schema keywords in input_schema', async () => {
@@ -64,3 +65,16 @@ test('toolToAPISchema preserves provider-specific schema keywords in input_schem
     },
   })
 })
+
+test('toolToAPISchema keeps skill required for SkillTool', async () => {
+  const schema = await toolToAPISchema(SkillTool, {
+    getToolPermissionContext: async () => getEmptyToolPermissionContext(),
+    tools: [] as unknown as Tools,
+    agents: [],
+  })
+
+  expect((schema as { input_schema: unknown }).input_schema).toMatchObject({
+    type: 'object',
+    required: ['skill'],
+  })
+})

src/utils/context.ts

@@ -72,23 +72,16 @@ export function getContextWindowForModel(
     return 1_000_000
   }
 
-  // OpenAI-compatible provider — use known context windows for the model.
+  // OpenAI-compatible provider — use known context windows for the model
-  // Unknown models get a conservative 8k default so auto-compact triggers
+  if (
-  // before hitting a hard context_window_exceeded error (issue #248 finding 3).
-  const isOpenAIProvider =
     isEnvTruthy(process.env.CLAUDE_CODE_USE_OPENAI) ||
     isEnvTruthy(process.env.CLAUDE_CODE_USE_GEMINI) ||
     isEnvTruthy(process.env.CLAUDE_CODE_USE_GITHUB)
-  if (isOpenAIProvider) {
+  ) {
     const openaiWindow = getOpenAIContextWindow(model)
     if (openaiWindow !== undefined) {
       return openaiWindow
     }
-    console.error(
-      `[context] Warning: model "${model}" not in context window table — using conservative 8k default. ` +
-      'Add it to src/utils/model/openaiContextWindows.ts for accurate compaction.',
-    )
-    return 8_000
   }
 
   const cap = getModelCapability(model)

src/utils/conversationRecovery.hooks.test.ts

@@ -69,93 +69,3 @@ test('loadConversationForResume rejects oversized transcripts before resume hook
   )
   expect(hookSpy).not.toHaveBeenCalled()
 })
-
-test('deserializeMessagesWithInterruptDetection strips thinking blocks only for OpenAI-compatible providers', async () => {
-  const serializedMessages = [
-    user(id(10), 'hello'),
-    {
-      type: 'assistant',
-      uuid: id(11),
-      parentUuid: id(10),
-      timestamp: ts,
-      cwd: '/tmp',
-      sessionId,
-      version: 'test',
-      message: {
-        role: 'assistant',
-        content: [
-          { type: 'thinking', thinking: 'secret reasoning' },
-          { type: 'text', text: 'visible reply' },
-        ],
-      },
-    },
-    {
-      type: 'assistant',
-      uuid: id(12),
-      parentUuid: id(11),
-      timestamp: ts,
-      cwd: '/tmp',
-      sessionId,
-      version: 'test',
-      message: {
-        role: 'assistant',
-        content: [{ type: 'thinking', thinking: 'only hidden reasoning' }],
-      },
-    },
-    user(id(13), 'follow up'),
-  ]
-
-  mock.module('./model/providers.js', () => ({
-    getAPIProvider: () => 'openai',
-    isOpenAICompatibleProvider: (provider: string) =>
-      provider === 'openai' ||
-      provider === 'gemini' ||
-      provider === 'github' ||
-      provider === 'codex',
-  }))
-
-  const openaiModule = await import(`./conversationRecovery.ts?provider=openai-${Date.now()}`)
-  const thirdParty = openaiModule.deserializeMessagesWithInterruptDetection(serializedMessages as never[])
-  const thirdPartyAssistantMessages = thirdParty.messages.filter(
-    message => message.type === 'assistant',
-  )
-
-  expect(thirdPartyAssistantMessages).toHaveLength(2)
-  expect(thirdPartyAssistantMessages[0]?.message?.content).toEqual([
-    { type: 'text', text: 'visible reply' },
-  ])
-  expect(
-    JSON.stringify(thirdPartyAssistantMessages.map(message => message.message?.content)),
-  ).not.toContain('secret reasoning')
-  expect(
-    JSON.stringify(thirdPartyAssistantMessages.map(message => message.message?.content)),
-  ).not.toContain('only hidden reasoning')
-
-  mock.restore()
-  mock.module('./model/providers.js', () => ({
-    getAPIProvider: () => 'bedrock',
-    isOpenAICompatibleProvider: (provider: string) =>
-      provider === 'openai' ||
-      provider === 'gemini' ||
-      provider === 'github' ||
-      provider === 'codex',
-  }))
-
-  const bedrockModule = await import(`./conversationRecovery.ts?provider=bedrock-${Date.now()}`)
-  const anthropicCompatible = bedrockModule.deserializeMessagesWithInterruptDetection(serializedMessages as never[])
-  const anthropicAssistantMessages = anthropicCompatible.messages.filter(
-    message => message.type === 'assistant',
-  )
-
-  expect(anthropicAssistantMessages).toHaveLength(2)
-  expect(anthropicAssistantMessages[0]?.message?.content).toEqual([
-    { type: 'thinking', thinking: 'secret reasoning' },
-    { type: 'text', text: 'visible reply' },
-  ])
-  expect(
-    JSON.stringify(anthropicAssistantMessages.map(message => message.message?.content)),
-  ).toContain('secret reasoning')
-  expect(
-    JSON.stringify(anthropicAssistantMessages.map(message => message.message?.content)),
-  ).not.toContain('only hidden reasoning')
-})

src/utils/conversationRecovery.test.ts

@@ -13,7 +13,6 @@ const originalSimple = process.env.CLAUDE_CODE_SIMPLE
 const sessionId = '00000000-0000-4000-8000-000000001999'
 const ts = '2026-04-02T00:00:00.000Z'
 
-
 function id(n: number): string {
   return `00000000-0000-4000-8000-${String(n).padStart(12, '0')}`
 }
@@ -77,3 +76,4 @@ test('loadConversationForResume rejects oversized reconstructed transcripts', as
     'Reconstructed transcript is too large to resume safely',
   )
 })
+

src/utils/conversationRecovery.ts

@@ -24,7 +24,6 @@ import {
   type FileHistorySnapshot,
 } from './fileHistory.js'
 import { logError } from './log.js'
-import { getAPIProvider } from './model/providers.js'
 import {
   createAssistantMessage,
   createUserMessage,
@@ -178,25 +177,6 @@ export type DeserializeResult = {
   turnInterruptionState: TurnInterruptionState
 }
 
-/**
- * Remove thinking/redacted_thinking content blocks from assistant messages.
- * Messages that become empty after stripping are removed entirely.
- */
-function stripThinkingBlocks(messages: NormalizedMessage[]): NormalizedMessage[] {
-  return messages.reduce<NormalizedMessage[]>((acc, msg) => {
-    if (msg.type !== 'assistant' || !Array.isArray(msg.message?.content)) {
-      acc.push(msg)
-      return acc
-    }
-    const filtered = msg.message.content.filter(
-      (block: { type?: string }) => block.type !== 'thinking' && block.type !== 'redacted_thinking',
-    )
-    if (filtered.length === 0) return acc
-    acc.push({ ...msg, message: { ...msg.message, content: filtered } })
-    return acc
-  }, [])
-}
-
 /**
  * Deserializes messages from a log file into the format expected by the REPL.
  * Filters unresolved tool uses, orphaned thinking messages, and appends a
@@ -247,19 +227,10 @@ export function deserializeMessagesWithInterruptDetection(
       filteredToolUses,
     ) as NormalizedMessage[]
 
-    // Strip thinking/redacted_thinking content blocks from assistant messages
-    // when resuming against a 3P provider. These Anthropic-specific blocks cause
-    // 400 errors or context corruption on OpenAI-compatible providers (issue #248 finding 5).
-    const provider = getAPIProvider()
-    const isThirdPartyProvider = provider !== 'firstParty' && provider !== 'bedrock' && provider !== 'vertex' && provider !== 'foundry'
-    const thinkingStripped = isThirdPartyProvider
-      ? stripThinkingBlocks(filteredThinking)
-      : filteredThinking
-
     // Filter out assistant messages with only whitespace text content.
     // This can happen when model outputs "\n\n" before thinking, user cancels mid-stream.
     const filteredMessages = filterWhitespaceOnlyAssistantMessages(
-      thinkingStripped,
+      filteredThinking,
     ) as NormalizedMessage[]
 
     const internalState = detectTurnInterruption(filteredMessages)

src/utils/ripgrep.test.ts

@@ -1,52 +1,11 @@
 import { expect, test } from 'bun:test'
-import path from 'path'
 
-import { resolveRipgrepConfig, wrapRipgrepUnavailableError } from './ripgrep.js'
+import { wrapRipgrepUnavailableError } from './ripgrep.ts'
-
-const MOCK_BUILTIN_PATH = path.normalize(
-  process.platform === 'win32'
-    ? `vendor/ripgrep/${process.arch}-win32/rg.exe`
-    : `vendor/ripgrep/${process.arch}-${process.platform}/rg`,
-)
-
-test('ripgrepCommand falls back to system rg when builtin binary is missing', () => {
-  const config = resolveRipgrepConfig({
-    userWantsSystemRipgrep: false,
-    bundledMode: false,
-    builtinCommand: MOCK_BUILTIN_PATH,
-    builtinExists: false,
-    systemExecutablePath: '/usr/bin/rg',
-    processExecPath: '/fake/bun',
-  })
-
-  expect(config).toMatchObject({
-    mode: 'system',
-    command: 'rg',
-    args: [],
-  })
-})
-
-test('ripgrepCommand keeps builtin mode when bundled binary exists', () => {
-  const config = resolveRipgrepConfig({
-    userWantsSystemRipgrep: false,
-    bundledMode: false,
-    builtinCommand: MOCK_BUILTIN_PATH,
-    builtinExists: true,
-    systemExecutablePath: '/usr/bin/rg',
-    processExecPath: '/fake/bun',
-  })
-
-  expect(config).toMatchObject({
-    mode: 'builtin',
-    command: MOCK_BUILTIN_PATH,
-    args: [],
-  })
-})
 
 test('wrapRipgrepUnavailableError explains missing packaged fallback', () => {
   const error = wrapRipgrepUnavailableError(
     { code: 'ENOENT', message: 'spawn rg ENOENT' },
-    { mode: 'builtin', command: 'C:\\fake\\vendor\\ripgrep\\rg.exe', args: [] },
+    { mode: 'builtin', command: 'C:\\fake\\vendor\\ripgrep\\rg.exe' },
     'win32',
   )
 
@@ -59,7 +18,7 @@ test('wrapRipgrepUnavailableError explains missing packaged fallback', () => {
 test('wrapRipgrepUnavailableError explains missing system ripgrep', () => {
   const error = wrapRipgrepUnavailableError(
     { code: 'ENOENT', message: 'spawn rg ENOENT' },
-    { mode: 'system', command: 'rg', args: [] },
+    { mode: 'system', command: 'rg' },
     'linux',
   )
 

src/utils/ripgrep.ts

@@ -1,6 +1,5 @@
 import type { ChildProcess, ExecFileException } from 'child_process'
 import { execFile, spawn } from 'child_process'
-import { existsSync } from 'fs'
 import memoize from 'lodash-es/memoize.js'
 import { homedir } from 'os'
 import * as path from 'path'
@@ -31,72 +30,40 @@ type RipgrepConfig = {
 
 type RipgrepErrorLike = Pick<NodeJS.ErrnoException, 'code' | 'message'>
 
-function isErrnoException(error: unknown): error is NodeJS.ErrnoException {
+const getRipgrepConfig = memoize((): RipgrepConfig => {
-  return error instanceof Error
+  const userWantsSystemRipgrep = isEnvDefinedFalsy(
-}
+    process.env.USE_BUILTIN_RIPGREP,
+  )
 
-type ResolveRipgrepConfigArgs = {
+  // Try system ripgrep if user wants it
-  userWantsSystemRipgrep: boolean
+  if (userWantsSystemRipgrep) {
-  bundledMode: boolean
+    const { cmd: systemPath } = findExecutable('rg', [])
-  builtinCommand: string
+    if (systemPath !== 'rg') {
-  builtinExists: boolean
+      // SECURITY: Use command name 'rg' instead of systemPath to prevent PATH hijacking
-  systemExecutablePath: string
+      // If we used systemPath, a malicious ./rg.exe in current directory could be executed
-  processExecPath?: string
+      // Using just 'rg' lets the OS resolve it safely with NoDefaultCurrentDirectoryInExePath protection
-}
+      return { mode: 'system', command: 'rg', args: [] }
-
+    }
-export function resolveRipgrepConfig({
-  userWantsSystemRipgrep,
-  bundledMode,
-  builtinCommand,
-  builtinExists,
-  systemExecutablePath,
-  processExecPath = process.execPath,
-}: ResolveRipgrepConfigArgs): RipgrepConfig {
-  if (userWantsSystemRipgrep && systemExecutablePath !== 'rg') {
-    // SECURITY: Use command name 'rg' instead of systemExecutablePath to prevent PATH hijacking
-    return { mode: 'system', command: 'rg', args: [] }
   }
 
-  if (bundledMode) {
+  // In bundled (native) mode, ripgrep is statically compiled into bun-internal
+  // and dispatches based on argv[0]. We spawn ourselves with argv0='rg'.
+  if (isInBundledMode()) {
     return {
       mode: 'embedded',
-      command: processExecPath,
+      command: process.execPath,
       args: ['--no-config'],
       argv0: 'rg',
     }
   }
 
-  if (builtinExists) {
-    return { mode: 'builtin', command: builtinCommand, args: [] }
-  }
-
-  if (systemExecutablePath !== 'rg') {
-    return { mode: 'system', command: 'rg', args: [] }
-  }
-
-  return { mode: 'builtin', command: builtinCommand, args: [] }
-}
-
-const getRipgrepConfig = memoize((): RipgrepConfig => {
-  const userWantsSystemRipgrep = isEnvDefinedFalsy(
-    process.env.USE_BUILTIN_RIPGREP,
-  )
-  const bundledMode = isInBundledMode()
   const rgRoot = path.resolve(__dirname, 'vendor', 'ripgrep')
-  const builtinCommand =
+  const command =
     process.platform === 'win32'
       ? path.resolve(rgRoot, `${process.arch}-win32`, 'rg.exe')
       : path.resolve(rgRoot, `${process.arch}-${process.platform}`, 'rg')
-  const builtinExists = existsSync(builtinCommand)
-  const { cmd: systemExecutablePath } = findExecutable('rg', [])
 
-  return resolveRipgrepConfig({
+  return { mode: 'builtin', command, args: [] }
-    userWantsSystemRipgrep,
-    bundledMode,
-    builtinCommand,
-    builtinExists,
-    systemExecutablePath,
-  })
 })
 
 export function ripgrepCommand(): {
@@ -357,9 +324,7 @@ async function ripGrepFileCount(
       if (settled) return
       settled = true
       reject(
-        isErrnoException(err) && err.code === 'ENOENT'
+        err.code === 'ENOENT' ? wrapRipgrepUnavailableError(err) : err,
-          ? wrapRipgrepUnavailableError(err)
-          : err,
       )
     })
   })
@@ -423,9 +388,7 @@ export async function ripGrepStream(
       if (settled) return
       settled = true
       reject(
-        isErrnoException(err) && err.code === 'ENOENT'
+        err.code === 'ENOENT' ? wrapRipgrepUnavailableError(err) : err,
-          ? wrapRipgrepUnavailableError(err)
-          : err,
       )
     })
   })
@@ -473,9 +436,7 @@ export async function ripGrep(
       const CRITICAL_ERROR_CODES = ['ENOENT', 'EACCES', 'EPERM']
       if (CRITICAL_ERROR_CODES.includes(error.code as string)) {
         reject(
-          isErrnoException(error) && error.code === 'ENOENT'
+          error.code === 'ENOENT' ? wrapRipgrepUnavailableError(error) : error,
-            ? wrapRipgrepUnavailableError(error)
-            : error,
         )
         return
       }

src/utils/schemaSanitizer.test.ts

@@ -1,68 +0,0 @@
-import { describe, expect, test } from 'bun:test'
-
-import { sanitizeSchemaForOpenAICompat } from './schemaSanitizer'
-
-describe('sanitizeSchemaForOpenAICompat', () => {
-  test('preserves Grep-like properties.pattern while keeping it required', () => {
-    const schema = {
-      type: 'object',
-      properties: {
-        pattern: {
-          type: 'string',
-          description: 'The regular expression pattern to search for in file contents',
-        },
-        path: { type: 'string' },
-        glob: { type: 'string' },
-      },
-      required: ['pattern'],
-    }
-
-    const sanitized = sanitizeSchemaForOpenAICompat(schema)
-    const properties = sanitized.properties as Record<string, unknown> | undefined
-
-    expect(Object.keys(properties ?? {})).toEqual(['pattern', 'path', 'glob'])
-    expect(properties?.pattern).toEqual({
-      type: 'string',
-      description: 'The regular expression pattern to search for in file contents',
-    })
-    expect(sanitized.required).toEqual(['pattern'])
-  })
-
-  test('preserves Glob-like properties.pattern while keeping it required', () => {
-    const schema = {
-      type: 'object',
-      properties: {
-        pattern: {
-          type: 'string',
-          description: 'The glob pattern to match files against',
-        },
-        path: { type: 'string' },
-      },
-      required: ['pattern'],
-    }
-
-    const sanitized = sanitizeSchemaForOpenAICompat(schema)
-    const properties = sanitized.properties as Record<string, unknown> | undefined
-
-    expect(Object.keys(properties ?? {})).toEqual(['pattern', 'path'])
-    expect(properties?.pattern).toEqual({
-      type: 'string',
-      description: 'The glob pattern to match files against',
-    })
-    expect(sanitized.required).toEqual(['pattern'])
-  })
-
-  test('strips JSON Schema validator pattern from string schemas', () => {
-    const schema = {
-      type: 'string',
-      pattern: '^[a-z]+$',
-      minLength: 1,
-    }
-
-    const sanitized = sanitizeSchemaForOpenAICompat(schema)
-
-    expect(sanitized).toEqual({
-      type: 'string',
-    })
-  })
-})

src/utils/schemaSanitizer.ts

@@ -33,15 +33,6 @@ function stripSchemaKeywords(schema: unknown, keywords: Set<string>): unknown {
 
   const result: Record<string, unknown> = {}
   for (const [key, value] of Object.entries(schema)) {
-    if (key === 'properties' && isSchemaRecord(value)) {
-      const sanitizedProps: Record<string, unknown> = {}
-      for (const [propName, propSchema] of Object.entries(value)) {
-        sanitizedProps[propName] = stripSchemaKeywords(propSchema, keywords)
-      }
-      result[key] = sanitizedProps
-      continue
-    }
-
     if (keywords.has(key)) {
       continue
     }
@@ -224,13 +215,10 @@ export function sanitizeSchemaForOpenAICompat(
     }
   }
 
-  const properties = isSchemaRecord(record.properties)
+  if (Array.isArray(record.required) && isSchemaRecord(record.properties)) {
-    ? record.properties
-    : undefined
-
-  if (Array.isArray(record.required) && properties) {
     record.required = record.required.filter(
-      (value): value is string => typeof value === 'string' && value in properties,
+      (value): value is string =>
+        typeof value === 'string' && value in record.properties,
     )
   }