Strip dead OTel event noise from telemetry compatibility paths

The open build no longer exports OpenTelemetry events, but several user-prompt, tool, hook, API, and survey paths were still constructing and calling a no-op logOTelEvent helper. This removes those dead calls, drops the now-unused helper module, and deletes an unreferenced GrowthBook experiment event artifact so the remaining compatibility layer is less distracting during future audits.

Constraint: Keep the local logEvent and tracing compatibility surfaces untouched where they still structure control flow
Constraint: Avoid touching unrelated bridge and session changes already present in the worktree
Rejected: Remove sessionTracing compatibility entirely | Call surface is still broad and intertwined with non-telemetry control flow
Rejected: Leave no-op OTel event calls in place | They add audit noise without preserving behavior
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Continue treating remaining telemetry-named helpers as removable only when their call sites are proven behavior-free
Tested: bun test src/services/analytics/index.test.ts src/components/FeedbackSurvey/submitTranscriptShare.test.ts
Tested: bun run ./scripts/build.ts
Not-tested: bun x tsc --noEmit (repository has pre-existing unrelated type errors)

src/utils/hooks.ts

@@ -55,7 +55,6 @@ import {
   logEvent,
   type AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS,
 } from 'src/services/analytics/index.js'
-import { logOTelEvent } from './telemetry/events.js'
 import { ALLOWED_OFFICIAL_MARKETPLACE_NAMES } from './plugins/schemas.js'
 import {
   startHookSpan,
@@ -2071,18 +2070,6 @@ async function* executeHooks({
     ? jsonStringify(getHookDefinitionsForTelemetry(matchingHooks))
     : '[]'
 
-  // Log hook execution start to OTEL (only for beta tracing)
-  if (isBetaTracingEnabled()) {
-    void logOTelEvent('hook_execution_start', {
-      hook_event: hookEvent,
-      hook_name: hookName,
-      num_hooks: String(matchingHooks.length),
-      managed_only: String(shouldAllowManagedHooksOnly()),
-      hook_definitions: hookDefinitionsJson,
-      hook_source: shouldAllowManagedHooksOnly() ? 'policySettings' : 'merged',
-    })
-  }
-
   // Start hook span for beta tracing
   const hookSpan = startHookSpan(
     hookEvent,
@@ -2943,25 +2930,6 @@ async function* executeHooks({
     totalDurationMs,
   })
 
-  // Log hook execution completion to OTEL (only for beta tracing)
-  if (isBetaTracingEnabled()) {
-    const hookDefinitionsComplete =
-      getHookDefinitionsForTelemetry(matchingHooks)
-
-    void logOTelEvent('hook_execution_complete', {
-      hook_event: hookEvent,
-      hook_name: hookName,
-      num_hooks: String(matchingHooks.length),
-      num_success: String(outcomes.success),
-      num_blocking: String(outcomes.blocking),
-      num_non_blocking_error: String(outcomes.non_blocking_error),
-      num_cancelled: String(outcomes.cancelled),
-      managed_only: String(shouldAllowManagedHooksOnly()),
-      hook_definitions: jsonStringify(hookDefinitionsComplete),
-      hook_source: shouldAllowManagedHooksOnly() ? 'policySettings' : 'merged',
-    })
-  }
-
   // End hook span for beta tracing
   endHookSpan(hookSpan, {
     numSuccess: outcomes.success,

src/utils/processUserInput/processTextPrompt.ts

@@ -9,7 +9,6 @@ import type {
 import { logEvent } from '../../services/analytics/index.js'
 import type { PermissionMode } from '../../types/permissions.js'
 import { createUserMessage } from '../messages.js'
-import { logOTelEvent, redactIfDisabled } from '../telemetry/events.js'
 import { startInteractionSpan } from '../telemetry/sessionTracing.js'
 import {
   matchesKeepGoingKeyword,
@@ -37,25 +36,6 @@ export function processTextPrompt(
       : input.find(block => block.type === 'text')?.text || ''
   startInteractionSpan(userPromptText)
 
-  // Emit user_prompt OTEL event for both string (CLI) and array (SDK/VS Code)
-  // input shapes. Previously gated on `typeof input === 'string'`, so VS Code
-  // sessions never emitted user_prompt (anthropics/claude-code#33301).
-  // For array input, use the LAST text block: createUserContent pushes the
-  // user's message last (after any <ide_selection>/attachment context blocks),
-  // so .findLast gets the actual prompt. userPromptText (first block) is kept
-  // unchanged for startInteractionSpan to preserve existing span attributes.
-  const otelPromptText =
-    typeof input === 'string'
-      ? input
-      : input.findLast(block => block.type === 'text')?.text || ''
-  if (otelPromptText) {
-    void logOTelEvent('user_prompt', {
-      prompt_length: String(otelPromptText.length),
-      prompt: redactIfDisabled(otelPromptText),
-      'prompt.id': promptId,
-    })
-  }
-
   const isNegative = matchesNegativeKeyword(userPromptText)
   const isKeepGoing = matchesKeepGoingKeyword(userPromptText)
   logEvent('tengu_input_prompt', {

src/utils/telemetry/events.ts

@@ -1,14 +0,0 @@
-/**
- * OpenTelemetry event egress is disabled in this build.
- */
-
-export function redactIfDisabled(_content: string): string {
-  return '<REDACTED>'
-}
-
-export async function logOTelEvent(
-  _eventName: string,
-  _metadata: { [key: string]: string | undefined } = {},
-): Promise<void> {
-  return
-}