diff --git a/packages/core/src/agents/a2aUtils.ts b/packages/core/src/agents/a2aUtils.ts
index 311658118b..f1e66309d6 100644
--- a/packages/core/src/agents/a2aUtils.ts
+++ b/packages/core/src/agents/a2aUtils.ts
@@ -28,7 +28,7 @@ export function extractMessageText(message: Message | undefined): string {
 /**
  * Extracts text from a single Part.
  */
-export function extractPartText(part: Part): string {
+function extractPartText(part: Part): string {
   if (isTextPart(part)) {
     return part.text;
   }
diff --git a/packages/core/src/config/storage.ts b/packages/core/src/config/storage.ts
index bd0fec1c8e..2d7f5d8c2a 100644
--- a/packages/core/src/config/storage.ts
+++ b/packages/core/src/config/storage.ts
@@ -8,11 +8,14 @@ import * as path from 'node:path';
 import * as os from 'node:os';
 import * as crypto from 'node:crypto';
 import * as fs from 'node:fs';
-import { GEMINI_DIR, homedir } from '../utils/paths.js';
+import {
+  GEMINI_DIR,
+  homedir,
+  GOOGLE_ACCOUNTS_FILENAME,
+} from '../utils/paths.js';
 import { ProjectRegistry } from './projectRegistry.js';
 import { StorageMigration } from './storageMigration.js';
 
-export const GOOGLE_ACCOUNTS_FILENAME = 'google_accounts.json';
 export const OAUTH_FILE = 'oauth_creds.json';
 const TMP_DIR_NAME = 'tmp';
 const BIN_DIR_NAME = 'bin';
diff --git a/packages/core/src/ide/detect-ide.ts b/packages/core/src/ide/detect-ide.ts
index 40aae11b7f..c07ef8254c 100644
--- a/packages/core/src/ide/detect-ide.ts
+++ b/packages/core/src/ide/detect-ide.ts
@@ -38,7 +38,7 @@ export function isCloudShell(): boolean {
   return !!(process.env['EDITOR_IN_CLOUD_SHELL'] || process.env['CLOUD_SHELL']);
 }
 
-export function isJetBrains(): boolean {
+function isJetBrains(): boolean {
   return !!process.env['TERMINAL_EMULATOR']
     ?.toLowerCase()
     .includes('jetbrains');
diff --git a/packages/core/src/mcp/oauth-provider.ts b/packages/core/src/mcp/oauth-provider.ts
index d0c8987d4a..95cec40f50 100644
--- a/packages/core/src/mcp/oauth-provider.ts
+++ b/packages/core/src/mcp/oauth-provider.ts
@@ -17,8 +17,6 @@ import { coreEvents } from '../utils/events.js';
 import { debugLogger } from '../utils/debugLogger.js';
 import { getConsentForOauth } from '../utils/authConsent.js';
 
-export const OAUTH_DISPLAY_MESSAGE_EVENT = 'oauth-display-message' as const;
-
 /**
  * OAuth configuration for an MCP server.
  */
diff --git a/packages/core/src/scheduler/confirmation.ts b/packages/core/src/scheduler/confirmation.ts
index 5d98dd526e..67ae26d2eb 100644
--- a/packages/core/src/scheduler/confirmation.ts
+++ b/packages/core/src/scheduler/confirmation.ts
@@ -59,7 +59,7 @@ export interface ResolutionResult {
  * @param correlationId The correlationId to match.
  * @param signal An AbortSignal to cancel the wait and cleanup listeners.
  */
-export async function awaitConfirmation(
+async function awaitConfirmation(
   messageBus: MessageBus,
   correlationId: string,
   signal: AbortSignal,
diff --git a/packages/core/src/services/chatCompressionService.ts b/packages/core/src/services/chatCompressionService.ts
index 9878358966..44ffe90cf2 100644
--- a/packages/core/src/services/chatCompressionService.ts
+++ b/packages/core/src/services/chatCompressionService.ts
@@ -37,18 +37,18 @@ import { LlmRole } from '../telemetry/types.js';
  * Default threshold for compression token count as a fraction of the model's
  * token limit. If the chat history exceeds this threshold, it will be compressed.
  */
-export const DEFAULT_COMPRESSION_TOKEN_THRESHOLD = 0.5;
+const DEFAULT_COMPRESSION_TOKEN_THRESHOLD = 0.5;
 
 /**
  * The fraction of the latest chat history to keep. A value of 0.3
  * means that only the last 30% of the chat history will be kept after compression.
  */
-export const COMPRESSION_PRESERVE_THRESHOLD = 0.3;
+const COMPRESSION_PRESERVE_THRESHOLD = 0.3;
 
 /**
  * The budget for function response tokens in the preserved history.
  */
-export const COMPRESSION_FUNCTION_RESPONSE_TOKEN_BUDGET = 50_000;
+const COMPRESSION_FUNCTION_RESPONSE_TOKEN_BUDGET = 50_000;
 
 /**
  * Returns the index of the oldest item to keep when compressing. May return
diff --git a/packages/core/src/telemetry/loggers.ts b/packages/core/src/telemetry/loggers.ts
index bbc47cfac8..54bec22a65 100644
--- a/packages/core/src/telemetry/loggers.ts
+++ b/packages/core/src/telemetry/loggers.ts
@@ -32,7 +32,6 @@ import type {
   ConversationFinishedEvent,
   ChatCompressionEvent,
   MalformedJsonResponseEvent,
-  InvalidChunkEvent,
   ContentRetryEvent,
   ContentRetryFailureEvent,
   RipgrepFallbackEvent,
@@ -65,7 +64,6 @@ import {
   recordToolCallMetrics,
   recordChatCompressionMetrics,
   recordFileOperationMetric,
-  recordInvalidChunk,
   recordContentRetry,
   recordContentRetryFailure,
   recordModelRoutingMetrics,
@@ -470,22 +468,6 @@ export function logMalformedJsonResponse(
   });
 }
 
-export function logInvalidChunk(
-  config: Config,
-  event: InvalidChunkEvent,
-): void {
-  ClearcutLogger.getInstance(config)?.logInvalidChunkEvent(event);
-  bufferTelemetryEvent(() => {
-    const logger = logs.getLogger(SERVICE_NAME);
-    const logRecord: LogRecord = {
-      body: event.toLogBody(),
-      attributes: event.toOpenTelemetryAttributes(config),
-    };
-    logger.emit(logRecord);
-    recordInvalidChunk(config);
-  });
-}
-
 export function logContentRetry(
   config: Config,
   event: ContentRetryEvent,
diff --git a/packages/core/src/telemetry/metrics.ts b/packages/core/src/telemetry/metrics.ts
index 5d8dd90bd1..f7869cb980 100644
--- a/packages/core/src/telemetry/metrics.ts
+++ b/packages/core/src/telemetry/metrics.ts
@@ -617,7 +617,7 @@ let baselineComparisonHistogram: Histogram | undefined;
 let isMetricsInitialized = false;
 let isPerformanceMonitoringEnabled = false;
 
-export function getMeter(): Meter | undefined {
+function getMeter(): Meter | undefined {
   if (!cliMeter) {
     cliMeter = metrics.getMeter(SERVICE_NAME);
   }
@@ -1019,7 +1019,7 @@ function getGenAiOperationName(): GenAiOperationName {
 
 // Performance Monitoring Functions
 
-export function initializePerformanceMonitoring(config: Config): void {
+function initializePerformanceMonitoring(config: Config): void {
   const meter = getMeter();
   if (!meter) return;
 
diff --git a/packages/core/src/telemetry/semantic.ts b/packages/core/src/telemetry/semantic.ts
index 23623b5b3e..c05d110e9f 100644
--- a/packages/core/src/telemetry/semantic.ts
+++ b/packages/core/src/telemetry/semantic.ts
@@ -240,7 +240,7 @@ export function toChatMessage(content?: Content): ChatMessage {
   return message;
 }
 
-export function toOTelPart(part: Part): AnyPart {
+function toOTelPart(part: Part): AnyPart {
   if (part.thought) {
     if (part.text) {
       return new ReasoningPart(part.text);
@@ -287,7 +287,7 @@ export enum OTelRole {
   TOOL = 'tool',
 }
 
-export function toOTelRole(role?: string): OTelRole {
+function toOTelRole(role?: string): OTelRole {
   switch (role?.toLowerCase()) {
     case 'system':
       return OTelRole.SYSTEM;
@@ -322,7 +322,7 @@ export enum OTelFinishReason {
   ERROR = 'error',
 }
 
-export function toOTelFinishReason(finishReason?: string): OTelFinishReason {
+function toOTelFinishReason(finishReason?: string): OTelFinishReason {
   switch (finishReason) {
     // we have significantly more finish reasons than the spec
     case FinishReason.FINISH_REASON_UNSPECIFIED:
@@ -376,7 +376,7 @@ export interface ChatMessage {
   parts: AnyPart[];
 }
 
-export class TextPart {
+class TextPart {
   readonly type = 'text';
   content: string;
 
@@ -385,7 +385,7 @@ export class TextPart {
   }
 }
 
-export class ToolCallRequestPart {
+class ToolCallRequestPart {
   readonly type = 'tool_call';
   name?: string;
   id?: string;
@@ -398,7 +398,7 @@ export class ToolCallRequestPart {
   }
 }
 
-export class ToolCallResponsePart {
+class ToolCallResponsePart {
   readonly type = 'tool_call_response';
   response?: string;
   id?: string;
@@ -409,7 +409,7 @@ export class ToolCallResponsePart {
   }
 }
 
-export class ReasoningPart {
+class ReasoningPart {
   readonly type = 'reasoning';
   content: string;
 
@@ -418,7 +418,7 @@ export class ReasoningPart {
   }
 }
 
-export class GenericPart {
+class GenericPart {
   type: string;
   [key: string]: unknown;
 
diff --git a/packages/core/src/utils/toolCallContext.ts b/packages/core/src/utils/toolCallContext.ts
index c371d23783..e89d20ddef 100644
--- a/packages/core/src/utils/toolCallContext.ts
+++ b/packages/core/src/utils/toolCallContext.ts
@@ -21,7 +21,7 @@ export interface ToolCallContext {
 /**
  * AsyncLocalStorage instance for tool call context.
  */
-export const toolCallContext = new AsyncLocalStorage<ToolCallContext>();
+const toolCallContext = new AsyncLocalStorage<ToolCallContext>();
 
 /**
  * Runs a function within a tool call context.