chore(8.0): modernize toolchain + position Bun as a runtime

Consumer-invisible modernization pass — no public API or runtime-behavior
change; dist for the override-only files is byte-identical.

Toolchain:
- CI: GitHub Actions matrix — Node 22/24 (test:unit) + Bun latest (test:bun).
- engines: node ">=22" (was "22.x"), bun ">=1.1.0".
- tsconfig: isolatedModules + noImplicitOverride; add the 33 `override`
  modifiers the flag requires across storage/integrations/vfs/transaction.
- deps: @types/node ^22; add prettier; drop dead standard-version,
  @rollup/plugin-* and the redundant embedded eslintConfig (flat
  eslint.config.js is the active config — verified identical lint output).

paramValidation: replace the top-level `await import('node:os'/'node:fs')`
with static ESM imports. The top-level-await form poisoned the module graph;
static imports also drop the browser/edge fallback branches no supported
runtime reaches (8.0 is Node/Bun/Deno-only).

Bun positioning: recommend Bun as a runtime (`bun add` / `bun run`), which is
green (test:bun 8/8). Drop single-binary `bun build --compile` as a target —
native addons cannot embed into it, and Bun 1.3.10 has a `--compile` codegen
regression around top-level await. Rename the Bun test to bun-runtime-test.ts
and correct docs that overclaimed single-binary support.

Gates: typecheck 0, build 0, test:unit 1743/1743, test:bun 8/8.

src/integrations/odata/ODataIntegration.ts

@@ -253,7 +253,7 @@ export class ODataIntegration extends IntegrationBase implements HTTPIntegration
   /**
    * Get augmentation manifest
    */
-  getManifest(): Record<string, any> {
+  override getManifest(): Record<string, any> {
     return {
       id: 'odata',
       name: 'OData Integration',

src/integrations/sheets/GoogleSheetsIntegration.ts

@@ -283,7 +283,7 @@ export class GoogleSheetsIntegration
   /**
    * Get manifest
    */
-  getManifest(): Record<string, any> {
+  override getManifest(): Record<string, any> {
     return {
       id: 'sheets',
       name: 'Google Sheets Integration',

src/integrations/sse/SSEIntegration.ts

@@ -292,7 +292,7 @@ export class SSEIntegration
   /**
    * Get manifest
    */
-  getManifest(): Record<string, any> {
+  override getManifest(): Record<string, any> {
     return {
       id: 'sse',
       name: 'SSE Streaming',

src/integrations/webhooks/WebhookIntegration.ts

@@ -262,7 +262,7 @@ export class WebhookIntegration extends IntegrationBase {
   /**
    * Get manifest
    */
-  getManifest(): Record<string, any> {
+  override getManifest(): Record<string, any> {
     return {
       id: 'webhooks',
       name: 'Webhooks',

src/storage/adapters/fileSystemStorage.ts

@@ -164,7 +164,7 @@ export class FileSystemStorage extends BaseStorage {
    *
    * @returns FileSystem-optimized batch configuration
    */
-  public getBatchConfig(): StorageBatchConfig {
+  public override getBatchConfig(): StorageBatchConfig {
     return {
       maxBatchSize: 500,
       batchDelayMs: 0,
@@ -180,7 +180,7 @@ export class FileSystemStorage extends BaseStorage {
   /**
    * Initialize the storage adapter
    */
-  public async init(): Promise<void> {
+  public override async init(): Promise<void> {
     if (this.isInitialized) {
       return
     }
@@ -952,7 +952,7 @@ export class FileSystemStorage extends BaseStorage {
    *
    * @param prefix - Storage-root-relative directory prefix to remove.
    */
-  public async removeRawPrefix(prefix: string): Promise<void> {
+  public override async removeRawPrefix(prefix: string): Promise<void> {
     await this.ensureInitialized()
     await fs.promises.rm(path.join(this.rootDir, prefix), { recursive: true, force: true })
   }
@@ -966,7 +966,7 @@ export class FileSystemStorage extends BaseStorage {
    *
    * @param paths - Storage-root-relative object paths previously written.
    */
-  public async syncRawObjects(paths: string[]): Promise<void> {
+  public override async syncRawObjects(paths: string[]): Promise<void> {
     await this.ensureInitialized()
     const parentDirs = new Set<string>()
 
@@ -1539,7 +1539,7 @@ export class FileSystemStorage extends BaseStorage {
   // Removed 10 *_internal method overrides - now inherit from BaseStorage's type-first implementation
   // Removed 2 pagination methods (getNounsWithPagination, getVerbsWithPagination) - use BaseStorage's implementation
 
-  public supportsMultiProcessLocking(): boolean {
+  public override supportsMultiProcessLocking(): boolean {
     return true
   }
 
@@ -1557,7 +1557,7 @@ export class FileSystemStorage extends BaseStorage {
    *      `lastHeartbeat` is older than `WRITER_STALE_THRESHOLD_MS` (60s).
    * Stale locks are overwritten with a warning. `force: true` overrides even live locks.
    */
-  public async acquireWriterLock(options?: { force?: boolean }): Promise<WriterLockInfo | null> {
+  public override async acquireWriterLock(options?: { force?: boolean }): Promise<WriterLockInfo | null> {
     await this.ensureInitialized()
     await this.ensureDirectoryExists(this.lockDir)
 
@@ -1639,7 +1639,7 @@ export class FileSystemStorage extends BaseStorage {
     return info
   }
 
-  public async releaseWriterLock(): Promise<void> {
+  public override async releaseWriterLock(): Promise<void> {
     if (this.writerLockHeartbeat) {
       clearInterval(this.writerLockHeartbeat)
       this.writerLockHeartbeat = undefined
@@ -1664,7 +1664,7 @@ export class FileSystemStorage extends BaseStorage {
     }
   }
 
-  public async readWriterLock(): Promise<WriterLockInfo | null> {
+  public override async readWriterLock(): Promise<WriterLockInfo | null> {
     await this.ensureInitialized()
     const lockFile = path.join(this.lockDir, FileSystemStorage.WRITER_LOCK_FILE)
     try {
@@ -1749,7 +1749,7 @@ export class FileSystemStorage extends BaseStorage {
    * `locks/_flush_responses/` with the same request ID. Stale `.req` files
    * (>FLUSH_REQUEST_TTL_MS) are garbage-collected on every tick.
    */
-  public startFlushRequestWatcher(onRequest: () => Promise<void>): void {
+  public override startFlushRequestWatcher(onRequest: () => Promise<void>): void {
     if (this.flushWatcherInterval) return // already watching
     this.flushWatcherOnRequest = onRequest
 
@@ -1772,7 +1772,7 @@ export class FileSystemStorage extends BaseStorage {
     }
   }
 
-  public stopFlushRequestWatcher(): void {
+  public override stopFlushRequestWatcher(): void {
     if (this.flushWatcherInterval) {
       clearInterval(this.flushWatcherInterval)
       this.flushWatcherInterval = undefined
@@ -1851,7 +1851,7 @@ export class FileSystemStorage extends BaseStorage {
    * Inspector side: drop a `.req` file and poll for the corresponding `.ack`.
    * Returns true if the writer acknowledged in time, false on timeout.
    */
-  public async requestFlushOverFilesystem(timeoutMs: number): Promise<boolean> {
+  public override async requestFlushOverFilesystem(timeoutMs: number): Promise<boolean> {
     await this.ensureInitialized()
     const reqDir = path.join(this.lockDir, FileSystemStorage.FLUSH_REQUEST_DIR)
     const ackDir = path.join(this.lockDir, FileSystemStorage.FLUSH_RESPONSE_DIR)

src/storage/adapters/memoryStorage.ts

@@ -69,7 +69,7 @@ export class MemoryStorage extends BaseStorage {
    *
    * @returns Memory-optimized batch configuration
    */
-  public getBatchConfig(): StorageBatchConfig {
+  public override getBatchConfig(): StorageBatchConfig {
     return {
       maxBatchSize: 1000,
       batchDelayMs: 0,
@@ -86,7 +86,7 @@ export class MemoryStorage extends BaseStorage {
    * Initialize the storage adapter
    * Calls super.init() to initialize GraphAdjacencyIndex and type statistics
    */
-  public async init(): Promise<void> {
+  public override async init(): Promise<void> {
     await super.init()
   }
 

src/storage/baseStorage.ts

@@ -1551,7 +1551,7 @@ export abstract class BaseStorage extends BaseStorageAdapter {
    * - Early termination when offset + limit entities collected
    * - Memory efficient: Never loads full dataset
    */
-  public async getNounsWithPagination(options: {
+  public override async getNounsWithPagination(options: {
     limit: number
     offset: number
     cursor?: string  // Opaque resume token from a prior page's nextCursor; when set it supersedes offset (O(N) walk, no re-scan)
@@ -1717,7 +1717,7 @@ export abstract class BaseStorage extends BaseStorageAdapter {
    * - Memory efficient: Never loads full dataset
    * - Inline filtering for sourceId, targetId, verbType
    */
-  public async getVerbsWithPagination(options: {
+  public override async getVerbsWithPagination(options: {
     limit: number
     offset: number
     cursor?: string  // Opaque resume token from a prior page's nextCursor; when set it supersedes offset (O(N) walk, no re-scan)
@@ -2442,13 +2442,13 @@ export abstract class BaseStorage extends BaseStorageAdapter {
    * Clear all data from storage
    * This method should be implemented by each specific adapter
    */
-  public abstract clear(): Promise<void>
+  public abstract override clear(): Promise<void>
 
   /**
    * Get information about storage usage and capacity
    * This method should be implemented by each specific adapter
    */
-  public abstract getStorageStatus(): Promise<{
+  public abstract override getStorageStatus(): Promise<{
     type: string
     used: number
     quota: number | null
@@ -2957,7 +2957,7 @@ export abstract class BaseStorage extends BaseStorageAdapter {
    *
    * @public - Inherited from BaseStorageAdapter
    */
-  public getBatchConfig(): StorageBatchConfig {
+  public override getBatchConfig(): StorageBatchConfig {
     // Conservative defaults - adapters should override with their actual limits
     return {
       maxBatchSize: 100,
@@ -3513,7 +3513,7 @@ export abstract class BaseStorage extends BaseStorageAdapter {
    * writer flush — the same silent-stale failure mode that once produced
    * zero counts from `brain.stats()`.
    */
-  public async flushCounts(): Promise<void> {
+  public override async flushCounts(): Promise<void> {
     await super.flushCounts()
     await this.saveTypeStatistics()
     await this.saveSubtypeStatistics()
@@ -4297,7 +4297,7 @@ export abstract class BaseStorage extends BaseStorageAdapter {
    * Save statistics data to storage (public interface)
    * @param statistics The statistics data to save
    */
-  public async saveStatistics(statistics: StatisticsData): Promise<void> {
+  public override async saveStatistics(statistics: StatisticsData): Promise<void> {
     return this.saveStatisticsData(statistics)
   }
 
@@ -4305,7 +4305,7 @@ export abstract class BaseStorage extends BaseStorageAdapter {
    * Get statistics data from storage (public interface)
    * @returns Promise that resolves to the statistics data or null if not found
    */
-  public async getStatistics(): Promise<StatisticsData | null> {
+  public override async getStatistics(): Promise<StatisticsData | null> {
     return this.getStatisticsData()
   }
 
@@ -4314,7 +4314,7 @@ export abstract class BaseStorage extends BaseStorageAdapter {
    * This method should be implemented by each specific adapter
    * @param statistics The statistics data to save
    */
-  protected abstract saveStatisticsData(
+  protected abstract override saveStatisticsData(
     statistics: StatisticsData
   ): Promise<void>
 
@@ -4323,5 +4323,5 @@ export abstract class BaseStorage extends BaseStorageAdapter {
    * This method should be implemented by each specific adapter
    * @returns Promise that resolves to the statistics data or null if not found
    */
-  protected abstract getStatisticsData(): Promise<StatisticsData | null>
+  protected abstract override getStatisticsData(): Promise<StatisticsData | null>
 }

src/transaction/errors.ts

@@ -26,7 +26,7 @@ export class TransactionExecutionError extends TransactionError {
     message: string,
     public readonly operationIndex: number,
     public readonly operationName: string | undefined,
-    public readonly cause: Error
+    public override readonly cause: Error
   ) {
     super(message, {
       operationIndex,

src/utils/paramValidation.ts

@@ -10,15 +10,13 @@ import { NounType, VerbType } from '../types/graphTypes.js'
 import { prodLog } from './logger.js'
 import { findCallerLocation } from './callerLocation.js'
 
-// Dynamic import for Node.js os and fs modules
-let os: any = null
-let fs: any = null
-try {
-  os = await import('node:os')
-  fs = await import('node:fs')
-} catch (e) {
-  // OS/FS modules not available
-}
+// 8.0 is Node/Bun/Deno-only (no browser path), so `node:os` / `node:fs` are
+// always present — static ESM imports instead of a top-level `await import()`.
+// The TLA form poisoned the module graph with a top-level await, which `bun
+// build --compile` refuses; the static form also drops the browser/edge
+// fallback branches that no supported runtime can reach.
+import * as os from 'node:os'
+import * as fs from 'node:fs'
 
 const getSystemMemory = (): number => {
   if (os) {

src/vfs/streams/VFSReadStream.ts

@@ -25,7 +25,7 @@ export class VFSReadStream extends Readable {
     this.position = options.start || 0
   }
 
-  async _read(size: number): Promise<void> {
+  override async _read(size: number): Promise<void> {
     try {
       // Lazy load entity
       if (!this.entity) {
@@ -58,7 +58,7 @@ export class VFSReadStream extends Readable {
     }
   }
 
-  _destroy(error: Error | null, callback: (error?: Error | null) => void): void {
+  override _destroy(error: Error | null, callback: (error?: Error | null) => void): void {
     // Clean up resources
     this.entity = null
     this.data = null

src/vfs/streams/VFSWriteStream.ts

@@ -28,7 +28,7 @@ export class VFSWriteStream extends Writable {
     }
   }
 
-  async _write(
+  override async _write(
     chunk: any,
     encoding: BufferEncoding,
     callback: (error?: Error | null) => void
@@ -52,7 +52,7 @@ export class VFSWriteStream extends Writable {
     }
   }
 
-  async _final(callback: (error?: Error | null) => void): Promise<void> {
+  override async _final(callback: (error?: Error | null) => void): Promise<void> {
     try {
       await this._flush()
       callback()
@@ -78,7 +78,7 @@ export class VFSWriteStream extends Writable {
     this.chunks = []
   }
 
-  _destroy(error: Error | null, callback: (error?: Error | null) => void): void {
+  override _destroy(error: Error | null, callback: (error?: Error | null) => void): void {
     // Clean up resources
     this.chunks = []
     this._closed = true