fix: replace orchestrator-develop branch references with main

The orchestrator-develop branch no longer exists. Update all fallback
clone commands and test fixtures to use main instead.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

action.yml

@@ -279,35 +279,30 @@ inputs:
     description:
       '[Orchestrator] Specifies the repo for the unity builder. Useful if you forked the repo for testing, features, or
       fixes.'
-
-  hotRunnerEnabled:
-    description: '[HotRunner] Use persistent hot runner for builds (requires pre-registered runners)'
+  gitIntegrityCheck:
+    description: 'Run git integrity checks before build (fsck, lock cleanup, submodule validation)'
     required: false
     default: 'false'
-  hotRunnerTransport:
-    description: '[HotRunner] Transport protocol for hot runner communication: websocket, grpc, named-pipe'
+  gitAutoRecover:
+    description: 'Attempt automatic recovery if git corruption is detected'
     required: false
-    default: 'websocket'
-  hotRunnerHost:
-    description: '[HotRunner] Hot runner host address'
+    default: 'false'
+  cleanReservedFilenames:
+    description: 'Remove Windows reserved filenames that cause Unity import loops'
     required: false
-    default: 'localhost'
-  hotRunnerPort:
-    description: '[HotRunner] Hot runner port number'
+    default: 'false'
+  buildArchiveEnabled:
+    description: 'Archive build output after successful build'
     required: false
-    default: '9090'
-  hotRunnerHealthInterval:
-    description: '[HotRunner] Health check interval in seconds'
+    default: 'false'
+  buildArchivePath:
+    description: 'Path to store build archives'
+    required: false
+    default: './build-archives'
+  buildArchiveRetention:
+    description: 'Days to retain build archives before cleanup'
     required: false
     default: '30'
-  hotRunnerMaxIdle:
-    description: '[HotRunner] Maximum idle time in seconds before recycling runner'
-    required: false
-    default: '3600'
-  hotRunnerFallbackToCold:
-    description: '[HotRunner] Fall back to cold build if no hot runner available'
-    required: false
-    default: 'true'
 
 outputs:
   volume:

src/index.ts

@@ -3,8 +3,7 @@ import { Action, BuildParameters, Cache, Orchestrator, Docker, ImageTag, Output
 import { Cli } from './model/cli/cli';
 import MacBuilder from './model/mac-builder';
 import PlatformSetup from './model/platform-setup';
-import { HotRunnerService } from './model/orchestrator/services/hot-runner';
-import { HotRunnerConfig } from './model/orchestrator/services/hot-runner/hot-runner-types';
+import { BuildReliabilityService } from './model/orchestrator/services/reliability';
 
 async function runMain() {
   try {
@@ -16,58 +15,63 @@ async function runMain() {
     Action.checkCompatibility();
     Cache.verify();
 
+    // Always configure git environment for CI reliability
+    BuildReliabilityService.configureGitEnvironment();
+
     const { workspace, actionFolder } = Action;
 
     const buildParameters = await BuildParameters.create();
     const baseImage = new ImageTag(buildParameters);
 
-    let exitCode = -1;
+    // Pre-build reliability checks
+    if (buildParameters.gitIntegrityCheck) {
+      core.info('Running git integrity checks...');
 
-    // Hot runner path: attempt to use a persistent Unity editor instance
-    if (buildParameters.hotRunnerEnabled) {
-      core.info('[HotRunner] Hot runner mode enabled, attempting hot build...');
+      const isHealthy = BuildReliabilityService.checkGitIntegrity(workspace);
+      BuildReliabilityService.cleanStaleLockFiles(workspace);
+      BuildReliabilityService.validateSubmoduleBackingStores(workspace);
 
-      const hotRunnerConfig: HotRunnerConfig = {
-        enabled: true,
-        transport: buildParameters.hotRunnerTransport,
-        host: buildParameters.hotRunnerHost,
-        port: buildParameters.hotRunnerPort,
-        healthCheckInterval: buildParameters.hotRunnerHealthInterval,
-        maxIdleTime: buildParameters.hotRunnerMaxIdle,
-        maxJobsBeforeRecycle: 0, // no automatic recycle by job count
-      };
+      if (buildParameters.cleanReservedFilenames) {
+        BuildReliabilityService.cleanReservedFilenames(buildParameters.projectPath);
+      }
 
-      const hotRunnerService = new HotRunnerService();
-
-      try {
-        await hotRunnerService.initialize(hotRunnerConfig);
-        const result = await hotRunnerService.submitBuild(buildParameters, (output) => {
-          core.info(output);
-        });
-
-        exitCode = result.exitCode;
-        core.info(`[HotRunner] Build completed with exit code ${exitCode}`);
-        await hotRunnerService.shutdown();
-      } catch (hotRunnerError) {
-        await hotRunnerService.shutdown();
-
-        if (buildParameters.hotRunnerFallbackToCold) {
-          core.warning(
-            `[HotRunner] Hot runner failed: ${(hotRunnerError as Error).message}. Falling back to cold build.`,
-          );
-          exitCode = await runColdBuild(buildParameters, baseImage, workspace, actionFolder);
-        } else {
-          throw hotRunnerError;
+      if (!isHealthy && buildParameters.gitAutoRecover) {
+        core.info('Git corruption detected, attempting automatic recovery...');
+        const recovered = BuildReliabilityService.recoverCorruptedRepo(workspace);
+        if (!recovered) {
+          core.warning('Automatic recovery failed. Build may encounter issues.');
         }
       }
-    } else if (buildParameters.providerStrategy === 'local') {
+    } else if (buildParameters.cleanReservedFilenames) {
+      // cleanReservedFilenames can run independently of gitIntegrityCheck
+      BuildReliabilityService.cleanReservedFilenames(buildParameters.projectPath);
+    }
+
+    let exitCode = -1;
+
+    if (buildParameters.providerStrategy === 'local') {
       core.info('Building locally');
-      exitCode = await runColdBuild(buildParameters, baseImage, workspace, actionFolder);
+      await PlatformSetup.setup(buildParameters, actionFolder);
+      exitCode =
+        process.platform === 'darwin'
+          ? await MacBuilder.run(actionFolder)
+          : await Docker.run(baseImage.toString(), {
+              workspace,
+              actionFolder,
+              ...buildParameters,
+            });
     } else {
       await Orchestrator.run(buildParameters, baseImage.toString());
       exitCode = 0;
     }
 
+    // Post-build: archive and enforce retention
+    if (buildParameters.buildArchiveEnabled && exitCode === 0) {
+      core.info('Archiving build output...');
+      BuildReliabilityService.archiveBuildOutput(buildParameters.buildPath, buildParameters.buildArchivePath);
+      BuildReliabilityService.enforceRetention(buildParameters.buildArchivePath, buildParameters.buildArchiveRetention);
+    }
+
     // Set output
     await Output.setBuildVersion(buildParameters.buildVersion);
     await Output.setAndroidVersionCode(buildParameters.androidVersionCode);
@@ -81,28 +85,4 @@ async function runMain() {
   }
 }
 
-async function runColdBuild(
-  buildParameters: BuildParameters,
-  baseImage: ImageTag,
-  workspace: string,
-  actionFolder: string,
-): Promise<number> {
-  if (buildParameters.providerStrategy === 'local') {
-    core.info('Building locally');
-    await PlatformSetup.setup(buildParameters, actionFolder);
-
-    return process.platform === 'darwin'
-      ? await MacBuilder.run(actionFolder)
-      : await Docker.run(baseImage.toString(), {
-          workspace,
-          actionFolder,
-          ...buildParameters,
-        });
-  } else {
-    await Orchestrator.run(buildParameters, baseImage.toString());
-
-    return 0;
-  }
-}
-
 runMain();

src/model/build-parameters.ts

@@ -106,13 +106,12 @@ class BuildParameters {
   public cacheUnityInstallationOnMac!: boolean;
   public unityHubVersionOnMac!: string;
   public dockerWorkspacePath!: string;
-  public hotRunnerEnabled!: boolean;
-  public hotRunnerTransport!: 'websocket' | 'grpc' | 'named-pipe';
-  public hotRunnerHost!: string;
-  public hotRunnerPort!: number;
-  public hotRunnerHealthInterval!: number;
-  public hotRunnerMaxIdle!: number;
-  public hotRunnerFallbackToCold!: boolean;
+  public gitIntegrityCheck!: boolean;
+  public gitAutoRecover!: boolean;
+  public cleanReservedFilenames!: boolean;
+  public buildArchiveEnabled!: boolean;
+  public buildArchivePath!: string;
+  public buildArchiveRetention!: number;
 
   public static shouldUseRetainedWorkspaceMode(buildParameters: BuildParameters) {
     return buildParameters.maxRetainedWorkspaces > 0 && Orchestrator.lockedWorkspace !== ``;
@@ -249,13 +248,12 @@ class BuildParameters {
       cacheUnityInstallationOnMac: Input.cacheUnityInstallationOnMac,
       unityHubVersionOnMac: Input.unityHubVersionOnMac,
       dockerWorkspacePath: Input.dockerWorkspacePath,
-      hotRunnerEnabled: Input.hotRunnerEnabled,
-      hotRunnerTransport: Input.hotRunnerTransport,
-      hotRunnerHost: Input.hotRunnerHost,
-      hotRunnerPort: Input.hotRunnerPort,
-      hotRunnerHealthInterval: Input.hotRunnerHealthInterval,
-      hotRunnerMaxIdle: Input.hotRunnerMaxIdle,
-      hotRunnerFallbackToCold: Input.hotRunnerFallbackToCold,
+      gitIntegrityCheck: Input.gitIntegrityCheck,
+      gitAutoRecover: Input.gitAutoRecover,
+      cleanReservedFilenames: Input.cleanReservedFilenames,
+      buildArchiveEnabled: Input.buildArchiveEnabled,
+      buildArchivePath: Input.buildArchivePath,
+      buildArchiveRetention: Input.buildArchiveRetention,
     };
   }
 

src/model/input.ts

@@ -282,38 +282,38 @@ class Input {
     return Input.getInput('skipActivation')?.toLowerCase() ?? 'false';
   }
 
-  static get hotRunnerEnabled(): boolean {
-    const input = Input.getInput('hotRunnerEnabled') ?? false;
+  static get gitIntegrityCheck(): boolean {
+    const input = Input.getInput('gitIntegrityCheck') ?? 'false';
 
     return input === 'true';
   }
 
-  static get hotRunnerTransport(): 'websocket' | 'grpc' | 'named-pipe' {
-    return (Input.getInput('hotRunnerTransport') ?? 'websocket') as 'websocket' | 'grpc' | 'named-pipe';
-  }
-
-  static get hotRunnerHost(): string {
-    return Input.getInput('hotRunnerHost') ?? 'localhost';
-  }
-
-  static get hotRunnerPort(): number {
-    return Number.parseInt(Input.getInput('hotRunnerPort') ?? '9090', 10);
-  }
-
-  static get hotRunnerHealthInterval(): number {
-    return Number.parseInt(Input.getInput('hotRunnerHealthInterval') ?? '30', 10);
-  }
-
-  static get hotRunnerMaxIdle(): number {
-    return Number.parseInt(Input.getInput('hotRunnerMaxIdle') ?? '3600', 10);
-  }
-
-  static get hotRunnerFallbackToCold(): boolean {
-    const input = Input.getInput('hotRunnerFallbackToCold') ?? 'true';
+  static get gitAutoRecover(): boolean {
+    const input = Input.getInput('gitAutoRecover') ?? 'false';
 
     return input === 'true';
   }
 
+  static get cleanReservedFilenames(): boolean {
+    const input = Input.getInput('cleanReservedFilenames') ?? 'false';
+
+    return input === 'true';
+  }
+
+  static get buildArchiveEnabled(): boolean {
+    const input = Input.getInput('buildArchiveEnabled') ?? 'false';
+
+    return input === 'true';
+  }
+
+  static get buildArchivePath(): string {
+    return Input.getInput('buildArchivePath') ?? './build-archives';
+  }
+
+  static get buildArchiveRetention(): number {
+    return Number.parseInt(Input.getInput('buildArchiveRetention') ?? '30', 10);
+  }
+
   public static ToEnvVarFormat(input: string) {
     if (input.toUpperCase() === input) {
       return input;

src/model/orchestrator/runners/README.md

@@ -1,5 +0,0 @@
-# Hot Runner Protocol
-
-Extensible runner registration and persistent Unity editor provider protocol.
-
-See GitHub Issue for full specification.

src/model/orchestrator/services/hot-runner/hot-runner-dispatcher.ts

@@ -1,159 +0,0 @@
-import OrchestratorLogger from '../core/orchestrator-logger';
-import { HotRunnerRegistry } from './hot-runner-registry';
-import { HotRunnerJobRequest, HotRunnerJobResult, HotRunnerStatus, HotRunnerTransport } from './hot-runner-types';
-
-const POLL_INTERVAL_MS = 1000;
-
-// eslint-disable-next-line no-unused-vars
-export type OutputCallback = (output: string) => void;
-
-export class HotRunnerDispatcher {
-  private transports: Map<string, HotRunnerTransport>;
-
-  constructor(transports: Map<string, HotRunnerTransport>) {
-    this.transports = transports;
-  }
-
-  /**
-   * Dispatch a job to an available hot runner matching the request's build target.
-   * If no runner is immediately available, waits up to the request timeout.
-   * Returns the job result, or throws if no runner becomes available in time.
-   */
-  async dispatchJob(
-    request: HotRunnerJobRequest,
-    registry: HotRunnerRegistry,
-    unityVersion: string,
-    onOutput?: OutputCallback,
-  ): Promise<HotRunnerJobResult> {
-    OrchestratorLogger.log(`[HotRunner] Dispatching job ${request.jobId} (target: ${request.buildTarget})`);
-
-    // Find or wait for an available runner
-    let runner = registry.findAvailableRunner({
-      unityVersion,
-      platform: request.buildTarget,
-    });
-
-    if (!runner) {
-      OrchestratorLogger.log(
-        `[HotRunner] No idle runner available for ${unityVersion}/${request.buildTarget}, waiting...`,
-      );
-      runner = await this.waitForRunner({ unityVersion, platform: request.buildTarget }, request.timeout, registry);
-    }
-
-    // Mark runner as busy
-    registry.updateRunner(runner.id, {
-      state: 'busy',
-      currentJob: request.jobId,
-    });
-
-    const transport = this.transports.get(runner.id);
-    if (!transport) {
-      registry.updateRunner(runner.id, { state: 'idle', currentJob: undefined });
-      throw new Error(`[HotRunner] No transport available for runner ${runner.id}`);
-    }
-
-    OrchestratorLogger.log(`[HotRunner] Sending job ${request.jobId} to runner ${runner.id}`);
-
-    const startTime = Date.now();
-
-    try {
-      const result = await this.executeWithTimeout(transport, request);
-
-      const duration = Date.now() - startTime;
-      OrchestratorLogger.log(
-        `[HotRunner] Job ${request.jobId} completed on runner ${runner.id} in ${duration}ms (exit: ${result.exitCode})`,
-      );
-
-      if (onOutput && result.output) {
-        onOutput(result.output);
-      }
-
-      // Mark runner as idle and increment job count
-      const currentStatus = registry.getRunner(runner.id);
-      registry.updateRunner(runner.id, {
-        state: 'idle',
-        currentJob: undefined,
-        lastJobCompleted: request.jobId,
-        jobsCompleted: (currentStatus?.jobsCompleted ?? 0) + 1,
-      });
-
-      return result;
-    } catch (error: any) {
-      OrchestratorLogger.logWarning(`[HotRunner] Job ${request.jobId} failed on runner ${runner.id}: ${error.message}`);
-
-      // Mark runner as idle despite failure -- the health monitor will recycle if needed
-      registry.updateRunner(runner.id, {
-        state: 'idle',
-        currentJob: undefined,
-      });
-
-      throw error;
-    }
-  }
-
-  /**
-   * Wait for an available runner matching the requirements.
-   * Polls the registry at a fixed interval until one becomes available or timeout expires.
-   */
-  async waitForRunner(
-    requirements: { unityVersion: string; platform: string },
-    timeoutMs: number,
-    registry: HotRunnerRegistry,
-  ): Promise<HotRunnerStatus> {
-    const deadline = Date.now() + timeoutMs;
-
-    while (Date.now() < deadline) {
-      const runner = registry.findAvailableRunner(requirements);
-      if (runner) {
-        OrchestratorLogger.log(`[HotRunner] Runner ${runner.id} became available`);
-
-        return runner;
-      }
-
-      await this.sleep(Math.min(POLL_INTERVAL_MS, deadline - Date.now()));
-    }
-
-    throw new Error(
-      `[HotRunner] Timed out waiting for available runner (${requirements.unityVersion}/${requirements.platform}) after ${timeoutMs}ms`,
-    );
-  }
-
-  /**
-   * Execute a job on a transport with a timeout guard.
-   * On timeout, disconnects the transport to release the connection
-   * and prevent the orphaned sendJob promise from holding resources.
-   */
-  private async executeWithTimeout(
-    transport: HotRunnerTransport,
-    request: HotRunnerJobRequest,
-  ): Promise<HotRunnerJobResult> {
-    const TIMEOUT_SENTINEL = Symbol('timeout');
-
-    const timeoutPromise = new Promise<typeof TIMEOUT_SENTINEL>((resolve) => {
-      setTimeout(() => {
-        resolve(TIMEOUT_SENTINEL);
-      }, request.timeout);
-    });
-
-    const result = await Promise.race([transport.sendJob(request), timeoutPromise]);
-
-    if (result === TIMEOUT_SENTINEL) {
-      // Disconnect the transport to clean up the orphaned sendJob call
-      try {
-        await transport.disconnect();
-      } catch (disconnectError: any) {
-        OrchestratorLogger.logWarning(
-          `[HotRunner] Error disconnecting transport after timeout for job ${request.jobId}: ${disconnectError.message}`,
-        );
-      }
-
-      throw new Error(`[HotRunner] Job ${request.jobId} timed out after ${request.timeout}ms`);
-    }
-
-    return result;
-  }
-
-  private sleep(ms: number): Promise<void> {
-    return new Promise((resolve) => setTimeout(resolve, ms));
-  }
-}

src/model/orchestrator/services/hot-runner/hot-runner-health-monitor.ts

@@ -1,186 +0,0 @@
-import OrchestratorLogger from '../core/orchestrator-logger';
-import { HotRunnerRegistry } from './hot-runner-registry';
-import { HotRunnerTransport } from './hot-runner-types';
-
-export class HotRunnerHealthMonitor {
-  private intervalHandle: ReturnType<typeof setInterval> | undefined;
-  private registry: HotRunnerRegistry | undefined;
-  private transports: Map<string, HotRunnerTransport> = new Map();
-
-  /**
-   * Start periodic health monitoring for all registered runners.
-   */
-  startMonitoring(registry: HotRunnerRegistry, interval: number, transports: Map<string, HotRunnerTransport>): void {
-    if (this.intervalHandle) {
-      this.stopMonitoring();
-    }
-
-    this.registry = registry;
-    this.transports = transports;
-
-    OrchestratorLogger.log(`[HotRunner] Starting health monitoring (interval: ${interval}s)`);
-
-    this.intervalHandle = setInterval(() => {
-      this.runHealthChecks().catch((error: any) => {
-        OrchestratorLogger.logWarning(`[HotRunner] Health check cycle failed: ${error.message}`);
-      });
-    }, interval * 1000);
-  }
-
-  /**
-   * Stop periodic health monitoring.
-   */
-  stopMonitoring(): void {
-    if (this.intervalHandle) {
-      clearInterval(this.intervalHandle);
-      this.intervalHandle = undefined;
-      OrchestratorLogger.log(`[HotRunner] Health monitoring stopped`);
-    }
-  }
-
-  /**
-   * Check health of a specific runner by ID. Returns true if healthy.
-   */
-  async checkHealth(runnerId: string): Promise<boolean> {
-    if (!this.registry) {
-      return false;
-    }
-
-    const transport = this.transports.get(runnerId);
-    if (!transport) {
-      OrchestratorLogger.logWarning(`[HotRunner] No transport for runner ${runnerId}`);
-      this.registry.updateRunner(runnerId, {
-        state: 'unhealthy',
-        lastHealthCheck: new Date().toISOString(),
-      });
-
-      return false;
-    }
-
-    try {
-      const healthy = await transport.healthCheck();
-      if (healthy) {
-        const status = await transport.getStatus();
-        this.registry.updateRunner(runnerId, {
-          lastHealthCheck: new Date().toISOString(),
-          memoryUsageMB: status.memoryUsageMB,
-          uptime: status.uptime,
-          libraryHash: status.libraryHash,
-        });
-
-        return true;
-      }
-
-      OrchestratorLogger.logWarning(`[HotRunner] Runner ${runnerId} health check returned false`);
-      this.registry.updateRunner(runnerId, {
-        state: 'unhealthy',
-        lastHealthCheck: new Date().toISOString(),
-      });
-
-      return false;
-    } catch (error: any) {
-      OrchestratorLogger.logWarning(`[HotRunner] Runner ${runnerId} health check failed: ${error.message}`);
-      this.registry.updateRunner(runnerId, {
-        state: 'unhealthy',
-        lastHealthCheck: new Date().toISOString(),
-      });
-
-      return false;
-    }
-  }
-
-  /**
-   * Mark an unhealthy runner for cleanup and disconnect its transport.
-   */
-  async recycleUnhealthyRunner(runnerId: string): Promise<void> {
-    if (!this.registry) {
-      return;
-    }
-
-    OrchestratorLogger.log(`[HotRunner] Recycling unhealthy runner ${runnerId}`);
-    this.registry.updateRunner(runnerId, { state: 'stopping' });
-
-    const transport = this.transports.get(runnerId);
-    if (transport) {
-      try {
-        await transport.disconnect();
-      } catch (error: any) {
-        OrchestratorLogger.logWarning(`[HotRunner] Error disconnecting runner ${runnerId}: ${error.message}`);
-      }
-      this.transports.delete(runnerId);
-    }
-
-    this.registry.unregisterRunner(runnerId);
-    OrchestratorLogger.log(`[HotRunner] Runner ${runnerId} recycled and removed`);
-  }
-
-  /**
-   * Recycle a runner that has been idle longer than the maximum idle time.
-   */
-  async recycleIdleRunner(runnerId: string, maxIdleTime: number): Promise<void> {
-    if (!this.registry) {
-      return;
-    }
-
-    const runner = this.registry.getRunner(runnerId);
-    if (!runner || runner.state !== 'idle') {
-      return;
-    }
-
-    const lastCheckTime = new Date(runner.lastHealthCheck).getTime();
-    const now = Date.now();
-    const idleSeconds = (now - lastCheckTime) / 1000;
-
-    if (idleSeconds >= maxIdleTime) {
-      OrchestratorLogger.log(
-        `[HotRunner] Runner ${runnerId} idle for ${Math.floor(idleSeconds)}s (max: ${maxIdleTime}s), recycling`,
-      );
-      await this.recycleUnhealthyRunner(runnerId);
-    }
-  }
-
-  /**
-   * Run health checks and idle-recycle checks for all registered runners.
-   */
-  private async runHealthChecks(): Promise<void> {
-    if (!this.registry) {
-      return;
-    }
-
-    const runners = this.registry.listRunners();
-
-    for (const runner of runners) {
-      if (runner.state === 'stopping') {
-        continue;
-      }
-
-      const healthy = await this.checkHealth(runner.id);
-
-      if (!healthy && runner.state !== 'starting') {
-        await this.recycleUnhealthyRunner(runner.id);
-        continue;
-      }
-
-      // Check for idle timeout
-      const config = this.registry.getConfig(runner.id);
-      if (config && runner.state === 'idle') {
-        await this.recycleIdleRunner(runner.id, config.maxIdleTime);
-      }
-
-      // Check for max jobs before recycle
-      if (config && config.maxJobsBeforeRecycle > 0 && runner.jobsCompleted >= config.maxJobsBeforeRecycle) {
-        OrchestratorLogger.log(
-          `[HotRunner] Runner ${runner.id} reached max jobs (${runner.jobsCompleted}/${config.maxJobsBeforeRecycle}), recycling`,
-        );
-        await this.recycleUnhealthyRunner(runner.id);
-      }
-    }
-  }
-
-  /**
-   * Whether health monitoring is currently active.
-   */
-  get isMonitoring(): boolean {
-    return this.intervalHandle !== undefined;
-  }
-}

src/model/orchestrator/services/hot-runner/hot-runner-registry.ts

@@ -1,315 +0,0 @@
-import fs from 'node:fs';
-import path from 'node:path';
-import { customAlphabet } from 'nanoid';
-import OrchestratorLogger from '../core/orchestrator-logger';
-import { HotRunnerConfig, HotRunnerStatus } from './hot-runner-types';
-
-const generateId = customAlphabet('abcdefghijklmnopqrstuvwxyz0123456789', 12);
-
-const PERSISTENCE_FILENAME = 'hot-runners.json';
-
-const VALID_RUNNER_STATES: ReadonlySet<string> = new Set(['idle', 'busy', 'starting', 'stopping', 'unhealthy']);
-
-export interface HotRunnerFilter {
-  platform?: string;
-  state?: string;
-  unityVersion?: string;
-}
-
-/**
- * Validate that a restored runner entry has all required fields with correct types.
- * Returns true if the entry is a valid HotRunnerStatus, false otherwise.
- */
-function isValidRunnerStatus(entry: unknown): entry is HotRunnerStatus {
-  if (typeof entry !== 'object' || entry === null) {
-    return false;
-  }
-
-  const record = entry as Record<string, unknown>;
-
-  return (
-    typeof record.id === 'string' &&
-    record.id.length > 0 &&
-    typeof record.state === 'string' &&
-    VALID_RUNNER_STATES.has(record.state) &&
-    typeof record.unityVersion === 'string' &&
-    typeof record.platform === 'string' &&
-    typeof record.uptime === 'number' &&
-    typeof record.jobsCompleted === 'number' &&
-    typeof record.lastHealthCheck === 'string' &&
-    typeof record.memoryUsageMB === 'number'
-  );
-}
-
-/**
- * Validate that a restored config entry has all required fields with correct types.
- * Returns true if the entry is a valid HotRunnerConfig, false otherwise.
- */
-function isValidRunnerConfig(entry: unknown): entry is HotRunnerConfig {
-  if (typeof entry !== 'object' || entry === null) {
-    return false;
-  }
-
-  const record = entry as Record<string, unknown>;
-
-  return (
-    typeof record.enabled === 'boolean' &&
-    typeof record.transport === 'string' &&
-    ['websocket', 'grpc', 'named-pipe'].includes(record.transport) &&
-    typeof record.host === 'string' &&
-    typeof record.port === 'number' &&
-    typeof record.healthCheckInterval === 'number' &&
-    typeof record.maxIdleTime === 'number' &&
-    typeof record.maxJobsBeforeRecycle === 'number'
-  );
-}
-
-export class HotRunnerRegistry {
-  private runners: Map<string, HotRunnerStatus> = new Map();
-  private configs: Map<string, HotRunnerConfig> = new Map();
-  private persistencePath: string;
-
-  constructor(persistenceDirectory?: string) {
-    this.persistencePath = persistenceDirectory ? path.join(persistenceDirectory, PERSISTENCE_FILENAME) : '';
-  }
-
-  /**
-   * Register a new hot runner. Returns the generated runner ID.
-   */
-  registerRunner(config: HotRunnerConfig): string {
-    const id = `hr-${generateId()}`;
-
-    const status: HotRunnerStatus = {
-      id,
-      state: 'starting',
-      unityVersion: config.unityVersion ?? 'unknown',
-      platform: config.platform ?? 'unknown',
-      uptime: 0,
-      jobsCompleted: 0,
-      lastHealthCheck: new Date().toISOString(),
-      memoryUsageMB: 0,
-    };
-
-    this.runners.set(id, status);
-    this.configs.set(id, config);
-    OrchestratorLogger.log(`[HotRunner] Registered runner ${id} (${status.unityVersion}/${status.platform})`);
-
-    this.persist();
-
-    return id;
-  }
-
-  /**
-   * Remove a runner from the registry.
-   */
-  unregisterRunner(id: string): void {
-    const existed = this.runners.delete(id);
-    this.configs.delete(id);
-
-    if (existed) {
-      OrchestratorLogger.log(`[HotRunner] Unregistered runner ${id}`);
-      this.persist();
-    }
-  }
-
-  /**
-   * Get a runner's current status by ID.
-   */
-  getRunner(id: string): HotRunnerStatus | undefined {
-    return this.runners.get(id);
-  }
-
-  /**
-   * Get a runner's config by ID.
-   */
-  getConfig(id: string): HotRunnerConfig | undefined {
-    return this.configs.get(id);
-  }
-
-  /**
-   * List all runners, optionally filtered by platform, state, or Unity version.
-   */
-  listRunners(filter?: HotRunnerFilter): HotRunnerStatus[] {
-    let results = [...this.runners.values()];
-
-    if (filter?.platform) {
-      results = results.filter((runner) => runner.platform === filter.platform);
-    }
-
-    if (filter?.state) {
-      results = results.filter((runner) => runner.state === filter.state);
-    }
-
-    if (filter?.unityVersion) {
-      results = results.filter((runner) => runner.unityVersion === filter.unityVersion);
-    }
-
-    return results;
-  }
-
-  /**
-   * Find an idle runner matching the given Unity version and platform requirements.
-   */
-  findAvailableRunner(requirements: { unityVersion: string; platform: string }): HotRunnerStatus | undefined {
-    return this.listRunners({
-      state: 'idle',
-      unityVersion: requirements.unityVersion,
-      platform: requirements.platform,
-    })[0];
-  }
-
-  /**
-   * Update a runner's status fields. Merges partial updates into existing status.
-   */
-  updateRunner(id: string, update: Partial<HotRunnerStatus>): void {
-    const existing = this.runners.get(id);
-    if (!existing) {
-      return;
-    }
-
-    this.runners.set(id, { ...existing, ...update, id });
-    this.persist();
-  }
-
-  /**
-   * Get the total number of registered runners.
-   */
-  get size(): number {
-    return this.runners.size;
-  }
-
-  /**
-   * Validate all runners in the registry and reset invalid ones to 'unhealthy'.
-   * Returns the number of runners that were repaired.
-   */
-  validateAndRepair(): number {
-    let repaired = 0;
-
-    for (const [id, status] of this.runners) {
-      // Cast to unknown to bypass the type guard narrowing to 'never',
-      // since the Map is typed as HotRunnerStatus but entries may have
-      // been corrupted via direct deserialization or unsafe casts.
-      const entry = status as unknown as Record<string, unknown>;
-
-      if (!isValidRunnerStatus(entry)) {
-        OrchestratorLogger.logWarning(`[HotRunner] Runner ${id} has invalid state, marking as unhealthy`);
-        this.runners.set(id, {
-          id,
-          state: 'unhealthy',
-          unityVersion: typeof entry.unityVersion === 'string' ? entry.unityVersion : 'unknown',
-          platform: typeof entry.platform === 'string' ? entry.platform : 'unknown',
-          uptime: typeof entry.uptime === 'number' ? entry.uptime : 0,
-          jobsCompleted: typeof entry.jobsCompleted === 'number' ? entry.jobsCompleted : 0,
-          lastHealthCheck: typeof entry.lastHealthCheck === 'string' ? entry.lastHealthCheck : new Date().toISOString(),
-          memoryUsageMB: typeof entry.memoryUsageMB === 'number' ? entry.memoryUsageMB : 0,
-        });
-        repaired++;
-      }
-    }
-
-    if (repaired > 0) {
-      this.persist();
-    }
-
-    return repaired;
-  }
-
-  /**
-   * Persist current registry state to disk for crash recovery.
-   * Validates data before writing to prevent persisting corrupt state.
-   */
-  private persist(): void {
-    if (!this.persistencePath) {
-      return;
-    }
-
-    try {
-      // Validate data before persisting
-      for (const [id, status] of this.runners) {
-        if (!isValidRunnerStatus(status)) {
-          OrchestratorLogger.logWarning(`[HotRunner] Skipping persistence -- runner ${id} has invalid state`);
-
-          return;
-        }
-      }
-
-      const data = {
-        runners: Object.fromEntries(this.runners),
-        configs: Object.fromEntries(this.configs),
-      };
-      const directory = path.dirname(this.persistencePath);
-      if (!fs.existsSync(directory)) {
-        fs.mkdirSync(directory, { recursive: true });
-      }
-
-      fs.writeFileSync(this.persistencePath, JSON.stringify(data, undefined, 2));
-    } catch (error: any) {
-      OrchestratorLogger.logWarning(`[HotRunner] Failed to persist registry: ${error.message}`);
-    }
-  }
-
-  /**
-   * Load registry state from disk. Returns the number of runners restored.
-   * Validates each restored entry and discards corrupt entries with warnings.
-   * If the persistence file itself is corrupt (invalid JSON), starts with
-   * an empty registry.
-   */
-  loadFromDisk(): number {
-    if (!this.persistencePath || !fs.existsSync(this.persistencePath)) {
-      return 0;
-    }
-
-    let data: any;
-
-    try {
-      const raw = fs.readFileSync(this.persistencePath, 'utf8');
-      data = JSON.parse(raw);
-    } catch (error: any) {
-      OrchestratorLogger.logWarning(
-        `[HotRunner] Persistence file is corrupt, starting with empty registry: ${error.message}`,
-      );
-
-      return 0;
-    }
-
-    if (typeof data !== 'object' || data === null) {
-      OrchestratorLogger.logWarning('[HotRunner] Persistence file has invalid structure, starting with empty registry');
-
-      return 0;
-    }
-
-    let discarded = 0;
-
-    if (data.runners && typeof data.runners === 'object') {
-      for (const [id, status] of Object.entries(data.runners)) {
-        if (isValidRunnerStatus(status)) {
-          this.runners.set(id, status);
-        } else {
-          OrchestratorLogger.logWarning(`[HotRunner] Discarding invalid runner entry '${id}' from persistence file`);
-          discarded++;
-        }
-      }
-    }
-
-    if (data.configs && typeof data.configs === 'object') {
-      for (const [id, config] of Object.entries(data.configs)) {
-        // Only restore configs for runners that were successfully restored
-        if (this.runners.has(id)) {
-          if (isValidRunnerConfig(config)) {
-            this.configs.set(id, config);
-          } else {
-            OrchestratorLogger.logWarning(`[HotRunner] Discarding invalid config entry '${id}' from persistence file`);
-          }
-        }
-      }
-    }
-
-    if (discarded > 0) {
-      OrchestratorLogger.logWarning(`[HotRunner] Discarded ${discarded} invalid runner(s) from persistence file`);
-    }
-
-    OrchestratorLogger.log(`[HotRunner] Restored ${this.runners.size} runner(s) from disk`);
-
-    return this.runners.size;
-  }
-}

src/model/orchestrator/services/hot-runner/hot-runner-service.ts

@@ -1,166 +0,0 @@
-import OrchestratorLogger from '../core/orchestrator-logger';
-import { HotRunnerRegistry } from './hot-runner-registry';
-import { HotRunnerHealthMonitor } from './hot-runner-health-monitor';
-import { HotRunnerDispatcher, OutputCallback } from './hot-runner-dispatcher';
-import {
-  HotRunnerConfig,
-  HotRunnerJobRequest,
-  HotRunnerJobResult,
-  HotRunnerStatus,
-  HotRunnerTransport,
-} from './hot-runner-types';
-import BuildParameters from '../../../build-parameters';
-
-export class HotRunnerService {
-  private registry: HotRunnerRegistry;
-  private healthMonitor: HotRunnerHealthMonitor;
-  private dispatcher: HotRunnerDispatcher;
-  private transports: Map<string, HotRunnerTransport> = new Map();
-  private config: HotRunnerConfig | undefined;
-
-  constructor(persistenceDirectory?: string) {
-    this.registry = new HotRunnerRegistry(persistenceDirectory);
-    this.healthMonitor = new HotRunnerHealthMonitor();
-    this.dispatcher = new HotRunnerDispatcher(this.transports);
-  }
-
-  /**
-   * Initialize the hot runner service: load persisted state, start health monitoring.
-   */
-  async initialize(config: HotRunnerConfig): Promise<void> {
-    this.config = config;
-
-    OrchestratorLogger.log(
-      `[HotRunner] Initializing service (transport: ${config.transport}, ${config.host}:${config.port})`,
-    );
-
-    // Attempt to restore previously registered runners from disk
-    const restored = this.registry.loadFromDisk();
-    if (restored > 0) {
-      OrchestratorLogger.log(`[HotRunner] Restored ${restored} runner(s) from persistence`);
-    }
-
-    // Start health monitoring
-    this.healthMonitor.startMonitoring(this.registry, config.healthCheckInterval, this.transports);
-
-    OrchestratorLogger.log(`[HotRunner] Service initialized`);
-  }
-
-  /**
-   * Register a runner with a transport implementation.
-   * Returns the runner ID.
-   */
-  registerRunner(config: HotRunnerConfig, transport: HotRunnerTransport): string {
-    const id = this.registry.registerRunner(config);
-    this.transports.set(id, transport);
-
-    return id;
-  }
-
-  /**
-   * Submit a build job to an available hot runner.
-   * Converts BuildParameters to a HotRunnerJobRequest and dispatches.
-   */
-  async submitBuild(params: BuildParameters, onOutput?: OutputCallback): Promise<HotRunnerJobResult> {
-    const request: HotRunnerJobRequest = {
-      jobId: params.buildGuid || `build-${Date.now()}`,
-      buildMethod: params.buildMethod || undefined,
-      buildTarget: params.targetPlatform,
-      buildPath: params.buildPath,
-      customParameters: params.customParameters ? this.parseCustomParameters(params.customParameters) : undefined,
-      timeout: 30 * 60 * 1000, // 30 minutes default
-    };
-
-    OrchestratorLogger.log(`[HotRunner] Submitting build: ${request.jobId} (target: ${request.buildTarget})`);
-
-    return this.dispatcher.dispatchJob(request, this.registry, params.editorVersion, onOutput);
-  }
-
-  /**
-   * Submit a test job to an available hot runner.
-   * Converts BuildParameters and optional suite config to a test-mode HotRunnerJobRequest.
-   */
-  async submitTest(
-    params: BuildParameters,
-    suiteConfig?: { testMode?: 'editmode' | 'playmode'; testSuitePath?: string },
-    onOutput?: OutputCallback,
-  ): Promise<HotRunnerJobResult> {
-    const request: HotRunnerJobRequest = {
-      jobId: params.buildGuid || `test-${Date.now()}`,
-      buildTarget: params.targetPlatform,
-      customParameters: params.customParameters ? this.parseCustomParameters(params.customParameters) : undefined,
-      timeout: 30 * 60 * 1000, // 30 minutes default
-      testMode: suiteConfig?.testMode ?? 'editmode',
-      testSuitePath: suiteConfig?.testSuitePath,
-    };
-
-    OrchestratorLogger.log(`[HotRunner] Submitting test: ${request.jobId} (mode: ${request.testMode})`);
-
-    return this.dispatcher.dispatchJob(request, this.registry, params.editorVersion, onOutput);
-  }
-
-  /**
-   * Shut down the service: stop health monitoring, disconnect all transports,
-   * and unregister all runners.
-   */
-  async shutdown(): Promise<void> {
-    OrchestratorLogger.log(`[HotRunner] Shutting down service`);
-
-    this.healthMonitor.stopMonitoring();
-
-    const disconnectPromises: Promise<void>[] = [];
-    for (const [id, transport] of this.transports.entries()) {
-      disconnectPromises.push(
-        transport.disconnect().catch((error: any) => {
-          OrchestratorLogger.logWarning(`[HotRunner] Error disconnecting runner ${id}: ${error.message}`);
-        }),
-      );
-    }
-    await Promise.all(disconnectPromises);
-
-    this.transports.clear();
-
-    OrchestratorLogger.log(`[HotRunner] Service shut down`);
-  }
-
-  /**
-   * Get the status of all registered runners.
-   */
-  getStatus(): HotRunnerStatus[] {
-    return this.registry.listRunners();
-  }
-
-  /**
-   * Get the underlying registry (for testing or advanced use).
-   */
-  getRegistry(): HotRunnerRegistry {
-    return this.registry;
-  }
-
-  /**
-   * Parse a space-separated custom parameters string into a key-value map.
-   * Handles `-key value` and `-key=value` formats.
-   */
-  private parseCustomParameters(raw: string): Record<string, string> {
-    const result: Record<string, string> = {};
-    const parts = raw.trim().split(/\s+/);
-
-    for (let i = 0; i < parts.length; i++) {
-      const part = parts[i];
-      if (part.startsWith('-')) {
-        const key = part.replace(/^-+/, '');
-        if (key.includes('=')) {
-          const [k, ...v] = key.split('=');
-          result[k] = v.join('=');
-        } else if (i + 1 < parts.length && !parts[i + 1].startsWith('-')) {
-          result[key] = parts[i + 1];
-          i++;
-        } else {
-          result[key] = 'true';
-        }
-      }
-    }
-
-    return result;
-  }
-}

src/model/orchestrator/services/hot-runner/hot-runner-types.ts

@@ -1,54 +0,0 @@
-export interface HotRunnerConfig {
-  enabled: boolean;
-  transport: 'websocket' | 'grpc' | 'named-pipe';
-  host: string;
-  port: number;
-  healthCheckInterval: number; // seconds
-  maxIdleTime: number; // seconds before recycling
-  maxJobsBeforeRecycle: number;
-  unityVersion?: string;
-  platform?: string;
-}
-
-export interface HotRunnerStatus {
-  id: string;
-  state: 'idle' | 'busy' | 'starting' | 'stopping' | 'unhealthy';
-  unityVersion: string;
-  platform: string;
-  currentJob?: string;
-  lastJobCompleted?: string;
-  uptime: number;
-  jobsCompleted: number;
-  lastHealthCheck: string;
-  memoryUsageMB: number;
-  libraryHash?: string;
-}
-
-export interface HotRunnerJobRequest {
-  jobId: string;
-  buildMethod?: string;
-  buildTarget: string;
-  buildPath?: string;
-  customParameters?: Record<string, string>;
-  timeout: number;
-  testMode?: 'editmode' | 'playmode';
-  testSuitePath?: string;
-}
-
-export interface HotRunnerJobResult {
-  jobId: string;
-  success: boolean;
-  exitCode: number;
-  duration: number;
-  output: string;
-  artifacts?: string[];
-  testResults?: string; // path to test result file
-}
-
-export interface HotRunnerTransport {
-  connect(config: HotRunnerConfig): Promise<void>;
-  disconnect(): Promise<void>;
-  sendJob(request: HotRunnerJobRequest): Promise<HotRunnerJobResult>;
-  getStatus(): Promise<HotRunnerStatus>;
-  healthCheck(): Promise<boolean>;
-}

src/model/orchestrator/services/hot-runner/hot-runner.test.ts

@@ -1,740 +0,0 @@
-import fs from 'node:fs';
-import { HotRunnerRegistry } from './hot-runner-registry';
-import { HotRunnerHealthMonitor } from './hot-runner-health-monitor';
-import { HotRunnerDispatcher } from './hot-runner-dispatcher';
-import { HotRunnerService } from './hot-runner-service';
-import {
-  HotRunnerConfig,
-  HotRunnerJobRequest,
-  HotRunnerJobResult,
-  HotRunnerStatus,
-  HotRunnerTransport,
-} from './hot-runner-types';
-
-// Mock dependencies
-jest.mock('node:fs');
-jest.mock('../core/orchestrator-logger');
-
-const mockFs = fs as jest.Mocked<typeof fs>;
-
-function createMockConfig(overrides?: Partial<HotRunnerConfig>): HotRunnerConfig {
-  return {
-    enabled: true,
-    transport: 'websocket',
-    host: 'localhost',
-    port: 9090,
-    healthCheckInterval: 30,
-    maxIdleTime: 3600,
-    maxJobsBeforeRecycle: 100,
-    unityVersion: '2022.3.0f1',
-    platform: 'StandaloneWindows64',
-    ...overrides,
-  };
-}
-
-function createMockTransport(overrides?: Partial<HotRunnerTransport>): HotRunnerTransport {
-  return {
-    // eslint-disable-next-line unicorn/no-useless-undefined
-    connect: jest.fn().mockResolvedValue(undefined),
-    // eslint-disable-next-line unicorn/no-useless-undefined
-    disconnect: jest.fn().mockResolvedValue(undefined),
-    sendJob: jest.fn().mockResolvedValue({
-      jobId: 'test-job',
-      success: true,
-      exitCode: 0,
-      duration: 5000,
-      output: 'Build succeeded',
-      artifacts: ['build/output.exe'],
-    } as HotRunnerJobResult),
-    getStatus: jest.fn().mockResolvedValue({
-      id: 'mock-runner',
-      state: 'idle',
-      unityVersion: '2022.3.0f1',
-      platform: 'StandaloneWindows64',
-      uptime: 3600,
-      jobsCompleted: 5,
-      lastHealthCheck: new Date().toISOString(),
-      memoryUsageMB: 1024,
-    } as HotRunnerStatus),
-    healthCheck: jest.fn().mockResolvedValue(true),
-    ...overrides,
-  };
-}
-
-function createMockJobRequest(overrides?: Partial<HotRunnerJobRequest>): HotRunnerJobRequest {
-  return {
-    jobId: 'job-001',
-    buildTarget: 'StandaloneWindows64',
-    timeout: 60000,
-    ...overrides,
-  };
-}
-
-// --- Registry Tests ---
-
-describe('HotRunnerRegistry', () => {
-  let registry: HotRunnerRegistry;
-
-  beforeEach(() => {
-    jest.clearAllMocks();
-    registry = new HotRunnerRegistry();
-  });
-
-  it('should register a runner and return an ID', () => {
-    const config = createMockConfig();
-    const id = registry.registerRunner(config);
-
-    expect(id).toMatch(/^hr-/);
-    expect(registry.size).toBe(1);
-  });
-
-  it('should retrieve a registered runner by ID', () => {
-    const config = createMockConfig();
-    const id = registry.registerRunner(config);
-    const runner = registry.getRunner(id);
-
-    expect(runner).toBeDefined();
-    expect(runner!.id).toBe(id);
-    expect(runner!.state).toBe('starting');
-    expect(runner!.unityVersion).toBe('2022.3.0f1');
-    expect(runner!.platform).toBe('StandaloneWindows64');
-  });
-
-  it('should return undefined for unknown runner ID', () => {
-    const runner = registry.getRunner('nonexistent');
-    expect(runner).toBeUndefined();
-  });
-
-  it('should unregister a runner', () => {
-    const id = registry.registerRunner(createMockConfig());
-    expect(registry.size).toBe(1);
-
-    registry.unregisterRunner(id);
-    expect(registry.size).toBe(0);
-    expect(registry.getRunner(id)).toBeUndefined();
-  });
-
-  it('should handle unregistering a nonexistent runner gracefully', () => {
-    registry.unregisterRunner('nonexistent');
-    expect(registry.size).toBe(0);
-  });
-
-  it('should list all runners without filter', () => {
-    registry.registerRunner(createMockConfig({ platform: 'StandaloneWindows64' }));
-    registry.registerRunner(createMockConfig({ platform: 'StandaloneLinux64' }));
-    registry.registerRunner(createMockConfig({ platform: 'StandaloneOSX' }));
-
-    const all = registry.listRunners();
-    expect(all).toHaveLength(3);
-  });
-
-  it('should filter runners by platform', () => {
-    registry.registerRunner(createMockConfig({ platform: 'StandaloneWindows64' }));
-    registry.registerRunner(createMockConfig({ platform: 'StandaloneLinux64' }));
-    registry.registerRunner(createMockConfig({ platform: 'StandaloneWindows64' }));
-
-    const windows = registry.listRunners({ platform: 'StandaloneWindows64' });
-    expect(windows).toHaveLength(2);
-
-    const linux = registry.listRunners({ platform: 'StandaloneLinux64' });
-    expect(linux).toHaveLength(1);
-  });
-
-  it('should filter runners by state', () => {
-    const id1 = registry.registerRunner(createMockConfig());
-    registry.registerRunner(createMockConfig());
-
-    registry.updateRunner(id1, { state: 'idle' });
-
-    // second runner remains in 'starting' state
-
-    const idle = registry.listRunners({ state: 'idle' });
-    expect(idle).toHaveLength(1);
-    expect(idle[0].id).toBe(id1);
-  });
-
-  it('should filter runners by Unity version', () => {
-    registry.registerRunner(createMockConfig({ unityVersion: '2022.3.0f1' }));
-    registry.registerRunner(createMockConfig({ unityVersion: '2023.1.0f1' }));
-    registry.registerRunner(createMockConfig({ unityVersion: '2022.3.0f1' }));
-
-    const v2022 = registry.listRunners({ unityVersion: '2022.3.0f1' });
-    expect(v2022).toHaveLength(2);
-  });
-
-  it('should find an available idle runner matching requirements', () => {
-    const id1 = registry.registerRunner(
-      createMockConfig({ unityVersion: '2022.3.0f1', platform: 'StandaloneWindows64' }),
-    );
-    registry.updateRunner(id1, { state: 'idle' });
-
-    const id2 = registry.registerRunner(
-      createMockConfig({ unityVersion: '2023.1.0f1', platform: 'StandaloneLinux64' }),
-    );
-    registry.updateRunner(id2, { state: 'idle' });
-
-    const found = registry.findAvailableRunner({
-      unityVersion: '2022.3.0f1',
-      platform: 'StandaloneWindows64',
-    });
-
-    expect(found).toBeDefined();
-    expect(found!.id).toBe(id1);
-  });
-
-  it('should return undefined when no runner matches requirements', () => {
-    const id = registry.registerRunner(
-      createMockConfig({ unityVersion: '2022.3.0f1', platform: 'StandaloneWindows64' }),
-    );
-    registry.updateRunner(id, { state: 'idle' });
-
-    const found = registry.findAvailableRunner({
-      unityVersion: '2023.1.0f1',
-      platform: 'StandaloneLinux64',
-    });
-
-    expect(found).toBeUndefined();
-  });
-
-  it('should update runner status fields', () => {
-    const id = registry.registerRunner(createMockConfig());
-    registry.updateRunner(id, { state: 'idle', memoryUsageMB: 2048 });
-
-    const runner = registry.getRunner(id);
-    expect(runner!.state).toBe('idle');
-    expect(runner!.memoryUsageMB).toBe(2048);
-
-    // ID should not be overridden by the update
-    expect(runner!.id).toBe(id);
-  });
-
-  it('should persist and load registry from disk', () => {
-    const persistenceRegistry = new HotRunnerRegistry('/tmp/test');
-    mockFs.existsSync.mockReturnValue(true);
-    mockFs.writeFileSync.mockImplementation(() => {});
-    mockFs.mkdirSync.mockImplementation(() => '' as any);
-
-    const id = persistenceRegistry.registerRunner(createMockConfig());
-
-    // Verify writeFileSync was called for persistence
-    expect(mockFs.writeFileSync).toHaveBeenCalled();
-    const writtenData = JSON.parse((mockFs.writeFileSync as jest.Mock).mock.calls[0][1] as string);
-    expect(writtenData.runners).toBeDefined();
-    expect(writtenData.runners[id]).toBeDefined();
-  });
-
-  it('should load runners from disk on loadFromDisk', () => {
-    const persistenceRegistry = new HotRunnerRegistry('/tmp/test');
-    const storedData = {
-      runners: {
-        'hr-restored': {
-          id: 'hr-restored',
-          state: 'idle',
-          unityVersion: '2022.3.0f1',
-          platform: 'StandaloneWindows64',
-          uptime: 100,
-          jobsCompleted: 3,
-          lastHealthCheck: new Date().toISOString(),
-          memoryUsageMB: 512,
-        },
-      },
-      configs: {
-        'hr-restored': createMockConfig(),
-      },
-    };
-
-    mockFs.existsSync.mockReturnValue(true);
-    mockFs.readFileSync.mockReturnValue(JSON.stringify(storedData));
-
-    const count = persistenceRegistry.loadFromDisk();
-    expect(count).toBe(1);
-    expect(persistenceRegistry.getRunner('hr-restored')).toBeDefined();
-  });
-
-  it('should discard invalid runner entries when loading from disk', () => {
-    const persistenceRegistry = new HotRunnerRegistry('/tmp/test');
-    const storedData = {
-      runners: {
-        'hr-valid': {
-          id: 'hr-valid',
-          state: 'idle',
-          unityVersion: '2022.3.0f1',
-          platform: 'StandaloneWindows64',
-          uptime: 100,
-          jobsCompleted: 3,
-          lastHealthCheck: new Date().toISOString(),
-          memoryUsageMB: 512,
-        },
-        'hr-invalid': {
-          // Missing required fields like state, unityVersion
-          id: 'hr-invalid',
-        },
-        'hr-bad-state': {
-          id: 'hr-bad-state',
-          state: 'nonexistent-state',
-          unityVersion: '2022.3.0f1',
-          platform: 'StandaloneWindows64',
-          uptime: 0,
-          jobsCompleted: 0,
-          lastHealthCheck: new Date().toISOString(),
-          memoryUsageMB: 0,
-        },
-      },
-      configs: {
-        'hr-valid': createMockConfig(),
-        'hr-invalid': createMockConfig(),
-        'hr-bad-state': createMockConfig(),
-      },
-    };
-
-    mockFs.existsSync.mockReturnValue(true);
-    mockFs.readFileSync.mockReturnValue(JSON.stringify(storedData));
-
-    const count = persistenceRegistry.loadFromDisk();
-    expect(count).toBe(1);
-    expect(persistenceRegistry.getRunner('hr-valid')).toBeDefined();
-    expect(persistenceRegistry.getRunner('hr-invalid')).toBeUndefined();
-    expect(persistenceRegistry.getRunner('hr-bad-state')).toBeUndefined();
-  });
-
-  it('should handle corrupt JSON persistence file gracefully', () => {
-    const persistenceRegistry = new HotRunnerRegistry('/tmp/test');
-
-    mockFs.existsSync.mockReturnValue(true);
-    mockFs.readFileSync.mockReturnValue('{ invalid json !!!');
-
-    const count = persistenceRegistry.loadFromDisk();
-    expect(count).toBe(0);
-    expect(persistenceRegistry.size).toBe(0);
-  });
-
-  it('should handle persistence file with invalid top-level structure', () => {
-    const persistenceRegistry = new HotRunnerRegistry('/tmp/test');
-
-    mockFs.existsSync.mockReturnValue(true);
-    mockFs.readFileSync.mockReturnValue('"just a string"');
-
-    const count = persistenceRegistry.loadFromDisk();
-    expect(count).toBe(0);
-  });
-
-  it('should handle persistence file with null runners', () => {
-    const persistenceRegistry = new HotRunnerRegistry('/tmp/test');
-
-    mockFs.existsSync.mockReturnValue(true);
-    mockFs.readFileSync.mockReturnValue('{"runners": null, "configs": null}');
-
-    const count = persistenceRegistry.loadFromDisk();
-    expect(count).toBe(0);
-  });
-
-  it('should validate and repair invalid runners', () => {
-    const persistenceRegistry = new HotRunnerRegistry('/tmp/test');
-    mockFs.existsSync.mockReturnValue(true);
-    mockFs.writeFileSync.mockImplementation(() => {});
-    mockFs.mkdirSync.mockImplementation(() => '' as any);
-
-    // Register a valid runner first
-    const id = persistenceRegistry.registerRunner(createMockConfig());
-    persistenceRegistry.updateRunner(id, { state: 'idle' });
-
-    // Manually corrupt the runner's state by setting an invalid state
-    // (we access via the public API -- updateRunner with a cast)
-    persistenceRegistry.updateRunner(id, { state: 'invalid-state' as any });
-
-    const repaired = persistenceRegistry.validateAndRepair();
-    expect(repaired).toBe(1);
-
-    const runner = persistenceRegistry.getRunner(id);
-    expect(runner!.state).toBe('unhealthy');
-  });
-
-  it('should not discard configs for valid runners when loading from disk', () => {
-    const persistenceRegistry = new HotRunnerRegistry('/tmp/test');
-    const storedData = {
-      runners: {
-        'hr-valid': {
-          id: 'hr-valid',
-          state: 'idle',
-          unityVersion: '2022.3.0f1',
-          platform: 'StandaloneWindows64',
-          uptime: 100,
-          jobsCompleted: 3,
-          lastHealthCheck: new Date().toISOString(),
-          memoryUsageMB: 512,
-        },
-      },
-      configs: {
-        'hr-valid': createMockConfig(),
-      },
-    };
-
-    mockFs.existsSync.mockReturnValue(true);
-    mockFs.readFileSync.mockReturnValue(JSON.stringify(storedData));
-
-    persistenceRegistry.loadFromDisk();
-    expect(persistenceRegistry.getConfig('hr-valid')).toBeDefined();
-  });
-});
-
-// --- Health Monitor Tests ---
-
-describe('HotRunnerHealthMonitor', () => {
-  let monitor: HotRunnerHealthMonitor;
-  let registry: HotRunnerRegistry;
-  let transports: Map<string, HotRunnerTransport>;
-
-  beforeEach(() => {
-    jest.clearAllMocks();
-    jest.useFakeTimers();
-    monitor = new HotRunnerHealthMonitor();
-    registry = new HotRunnerRegistry();
-    transports = new Map();
-  });
-
-  afterEach(() => {
-    monitor.stopMonitoring();
-    jest.useRealTimers();
-  });
-
-  it('should start and stop monitoring', () => {
-    monitor.startMonitoring(registry, 30, transports);
-    expect(monitor.isMonitoring).toBe(true);
-
-    monitor.stopMonitoring();
-    expect(monitor.isMonitoring).toBe(false);
-  });
-
-  it('should report healthy when transport health check passes', async () => {
-    const id = registry.registerRunner(createMockConfig());
-    registry.updateRunner(id, { state: 'idle' });
-
-    const transport = createMockTransport();
-    transports.set(id, transport);
-    monitor.startMonitoring(registry, 30, transports);
-
-    const healthy = await monitor.checkHealth(id);
-    expect(healthy).toBe(true);
-    expect(transport.healthCheck).toHaveBeenCalled();
-  });
-
-  it('should mark runner as unhealthy when health check fails', async () => {
-    const id = registry.registerRunner(createMockConfig());
-    registry.updateRunner(id, { state: 'idle' });
-
-    const transport = createMockTransport({
-      healthCheck: jest.fn().mockResolvedValue(false),
-    });
-    transports.set(id, transport);
-    monitor.startMonitoring(registry, 30, transports);
-
-    const healthy = await monitor.checkHealth(id);
-    expect(healthy).toBe(false);
-
-    const runner = registry.getRunner(id);
-    expect(runner!.state).toBe('unhealthy');
-  });
-
-  it('should mark runner as unhealthy when health check throws', async () => {
-    const id = registry.registerRunner(createMockConfig());
-    registry.updateRunner(id, { state: 'idle' });
-
-    const transport = createMockTransport({
-      healthCheck: jest.fn().mockRejectedValue(new Error('Connection refused')),
-    });
-    transports.set(id, transport);
-    monitor.startMonitoring(registry, 30, transports);
-
-    const healthy = await monitor.checkHealth(id);
-    expect(healthy).toBe(false);
-  });
-
-  it('should recycle unhealthy runner and remove from registry', async () => {
-    const id = registry.registerRunner(createMockConfig());
-    const transport = createMockTransport();
-    transports.set(id, transport);
-    monitor.startMonitoring(registry, 30, transports);
-
-    await monitor.recycleUnhealthyRunner(id);
-
-    expect(registry.getRunner(id)).toBeUndefined();
-    expect(transport.disconnect).toHaveBeenCalled();
-    expect(transports.has(id)).toBe(false);
-  });
-
-  it('should recycle idle runner when max idle time exceeded', async () => {
-    const id = registry.registerRunner(createMockConfig({ maxIdleTime: 60 }));
-
-    // Set lastHealthCheck to 120 seconds ago
-    const oldDate = new Date(Date.now() - 120 * 1000).toISOString();
-    registry.updateRunner(id, { state: 'idle', lastHealthCheck: oldDate });
-
-    const transport = createMockTransport();
-    transports.set(id, transport);
-    monitor.startMonitoring(registry, 30, transports);
-
-    await monitor.recycleIdleRunner(id, 60);
-
-    expect(registry.getRunner(id)).toBeUndefined();
-  });
-
-  it('should not recycle idle runner when within max idle time', async () => {
-    const id = registry.registerRunner(createMockConfig({ maxIdleTime: 3600 }));
-    registry.updateRunner(id, {
-      state: 'idle',
-      lastHealthCheck: new Date().toISOString(),
-    });
-
-    const transport = createMockTransport();
-    transports.set(id, transport);
-    monitor.startMonitoring(registry, 30, transports);
-
-    await monitor.recycleIdleRunner(id, 3600);
-
-    // Runner should still exist
-    expect(registry.getRunner(id)).toBeDefined();
-  });
-
-  it('should return false when no transport exists for runner', async () => {
-    const id = registry.registerRunner(createMockConfig());
-
-    // Do not set any transport for this runner
-    monitor.startMonitoring(registry, 30, transports);
-
-    const healthy = await monitor.checkHealth(id);
-    expect(healthy).toBe(false);
-  });
-});
-
-// --- Dispatcher Tests ---
-
-describe('HotRunnerDispatcher', () => {
-  let registry: HotRunnerRegistry;
-  let transports: Map<string, HotRunnerTransport>;
-  let dispatcher: HotRunnerDispatcher;
-
-  beforeEach(() => {
-    jest.clearAllMocks();
-    registry = new HotRunnerRegistry();
-    transports = new Map();
-    dispatcher = new HotRunnerDispatcher(transports);
-  });
-
-  it('should dispatch a job to an available runner', async () => {
-    const id = registry.registerRunner(createMockConfig());
-    registry.updateRunner(id, { state: 'idle' });
-
-    const transport = createMockTransport();
-    transports.set(id, transport);
-
-    const request = createMockJobRequest();
-    const result = await dispatcher.dispatchJob(request, registry, '2022.3.0f1');
-
-    expect(result.success).toBe(true);
-    expect(result.exitCode).toBe(0);
-    expect(transport.sendJob).toHaveBeenCalledWith(request);
-  });
-
-  it('should mark runner as busy during job execution', async () => {
-    const id = registry.registerRunner(createMockConfig());
-    registry.updateRunner(id, { state: 'idle' });
-
-    const statesDuringJob: string[] = [];
-    const transport = createMockTransport({
-      sendJob: jest.fn().mockImplementation(async () => {
-        const runner = registry.getRunner(id);
-        if (runner) statesDuringJob.push(runner.state);
-
-        return {
-          jobId: 'job-001',
-          success: true,
-          exitCode: 0,
-          duration: 1000,
-          output: 'ok',
-        };
-      }),
-    });
-    transports.set(id, transport);
-
-    await dispatcher.dispatchJob(createMockJobRequest(), registry, '2022.3.0f1');
-
-    expect(statesDuringJob).toContain('busy');
-
-    // After completion, should be idle again
-    const runner = registry.getRunner(id);
-    expect(runner!.state).toBe('idle');
-  });
-
-  it('should increment jobsCompleted after successful dispatch', async () => {
-    const id = registry.registerRunner(createMockConfig());
-    registry.updateRunner(id, { state: 'idle', jobsCompleted: 5 });
-
-    const transport = createMockTransport();
-    transports.set(id, transport);
-
-    await dispatcher.dispatchJob(createMockJobRequest(), registry, '2022.3.0f1');
-
-    const runner = registry.getRunner(id);
-    expect(runner!.jobsCompleted).toBe(6);
-  });
-
-  it('should throw when no runner is available and wait times out', async () => {
-    // No runners registered at all
-    const request = createMockJobRequest({ timeout: 100 });
-
-    await expect(dispatcher.dispatchJob(request, registry, '2022.3.0f1')).rejects.toThrow(/Timed out waiting/);
-  });
-
-  it('should throw when runner has no transport', async () => {
-    const id = registry.registerRunner(createMockConfig());
-    registry.updateRunner(id, { state: 'idle' });
-
-    // No transport set for this runner
-
-    const request = createMockJobRequest();
-
-    await expect(dispatcher.dispatchJob(request, registry, '2022.3.0f1')).rejects.toThrow(/No transport available/);
-  });
-
-  it('should handle job failure and return runner to idle', async () => {
-    const id = registry.registerRunner(createMockConfig());
-    registry.updateRunner(id, { state: 'idle' });
-
-    const transport = createMockTransport({
-      sendJob: jest.fn().mockRejectedValue(new Error('Unity crashed')),
-    });
-    transports.set(id, transport);
-
-    await expect(dispatcher.dispatchJob(createMockJobRequest(), registry, '2022.3.0f1')).rejects.toThrow(
-      'Unity crashed',
-    );
-
-    // Runner should be back to idle despite failure
-    const runner = registry.getRunner(id);
-    expect(runner!.state).toBe('idle');
-  });
-
-  it('should handle job timeout', async () => {
-    const id = registry.registerRunner(createMockConfig());
-    registry.updateRunner(id, { state: 'idle' });
-
-    const transport = createMockTransport({
-      sendJob: jest.fn().mockImplementation(
-        () => new Promise((resolve) => setTimeout(resolve, 60000)), // never resolves within timeout
-      ),
-    });
-    transports.set(id, transport);
-
-    const request = createMockJobRequest({ timeout: 50 });
-
-    await expect(dispatcher.dispatchJob(request, registry, '2022.3.0f1')).rejects.toThrow(/timed out/);
-  });
-
-  it('should disconnect transport on job timeout', async () => {
-    const id = registry.registerRunner(createMockConfig());
-    registry.updateRunner(id, { state: 'idle' });
-
-    const transport = createMockTransport({
-      sendJob: jest.fn().mockImplementation(
-        () => new Promise((resolve) => setTimeout(resolve, 60000)), // never resolves within timeout
-      ),
-    });
-    transports.set(id, transport);
-
-    const request = createMockJobRequest({ timeout: 50 });
-
-    await expect(dispatcher.dispatchJob(request, registry, '2022.3.0f1')).rejects.toThrow(/timed out/);
-
-    // Transport should have been disconnected to clean up orphaned connection
-    expect(transport.disconnect).toHaveBeenCalled();
-  });
-
-  it('should call output callback with job output', async () => {
-    const id = registry.registerRunner(createMockConfig());
-    registry.updateRunner(id, { state: 'idle' });
-
-    const transport = createMockTransport();
-    transports.set(id, transport);
-
-    const outputCallback = jest.fn();
-    await dispatcher.dispatchJob(createMockJobRequest(), registry, '2022.3.0f1', outputCallback);
-
-    expect(outputCallback).toHaveBeenCalledWith('Build succeeded');
-  });
-
-  it('should wait for runner to become available', async () => {
-    const id = registry.registerRunner(createMockConfig());
-
-    // Runner starts in 'starting' state, not idle
-
-    const transport = createMockTransport();
-    transports.set(id, transport);
-
-    // Simulate runner becoming idle after a short delay
-    setTimeout(() => {
-      registry.updateRunner(id, { state: 'idle' });
-    }, 50);
-
-    const request = createMockJobRequest({ timeout: 5000 });
-    const result = await dispatcher.dispatchJob(request, registry, '2022.3.0f1');
-
-    expect(result.success).toBe(true);
-  });
-});
-
-// --- Service Integration Tests ---
-
-describe('HotRunnerService', () => {
-  let service: HotRunnerService;
-
-  beforeEach(() => {
-    jest.clearAllMocks();
-    mockFs.existsSync.mockReturnValue(false);
-    service = new HotRunnerService();
-  });
-
-  afterEach(async () => {
-    await service.shutdown();
-  });
-
-  it('should initialize and shut down cleanly', async () => {
-    const config = createMockConfig();
-    await service.initialize(config);
-
-    const status = service.getStatus();
-    expect(status).toEqual([]);
-
-    await service.shutdown();
-  });
-
-  it('should register a runner with transport', async () => {
-    await service.initialize(createMockConfig());
-
-    const transport = createMockTransport();
-    const id = service.registerRunner(createMockConfig(), transport);
-
-    expect(id).toMatch(/^hr-/);
-    expect(service.getStatus()).toHaveLength(1);
-  });
-
-  it('should disconnect all transports on shutdown', async () => {
-    await service.initialize(createMockConfig());
-
-    const transport1 = createMockTransport();
-    const transport2 = createMockTransport();
-    service.registerRunner(createMockConfig(), transport1);
-    service.registerRunner(createMockConfig(), transport2);
-
-    await service.shutdown();
-
-    expect(transport1.disconnect).toHaveBeenCalled();
-    expect(transport2.disconnect).toHaveBeenCalled();
-  });
-
-  it('should expose the underlying registry', async () => {
-    await service.initialize(createMockConfig());
-    const registry = service.getRegistry();
-
-    expect(registry).toBeInstanceOf(HotRunnerRegistry);
-  });
-});

src/model/orchestrator/services/hot-runner/index.ts

@@ -1,11 +0,0 @@
-export { HotRunnerService } from './hot-runner-service';
-export { HotRunnerRegistry } from './hot-runner-registry';
-export { HotRunnerHealthMonitor } from './hot-runner-health-monitor';
-export { HotRunnerDispatcher } from './hot-runner-dispatcher';
-export type {
-  HotRunnerConfig,
-  HotRunnerStatus,
-  HotRunnerJobRequest,
-  HotRunnerJobResult,
-  HotRunnerTransport,
-} from './hot-runner-types';

src/model/orchestrator/services/reliability/build-reliability-service.test.ts

@@ -0,0 +1,638 @@
+import { execSync, execFileSync } from 'node:child_process';
+import fs from 'node:fs';
+import path from 'node:path';
+import { BuildReliabilityService } from './build-reliability-service';
+
+// Mock dependencies
+jest.mock('node:child_process');
+jest.mock('node:fs');
+jest.mock('@actions/core', () => ({
+  info: jest.fn(),
+  warning: jest.fn(),
+}));
+
+const mockExecSync = execSync as jest.MockedFunction<typeof execSync>;
+const mockExecFileSync = execFileSync as jest.MockedFunction<typeof execFileSync>;
+const mockFs = fs as jest.Mocked<typeof fs>;
+
+describe('BuildReliabilityService', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  // =========================================================================
+  // checkGitIntegrity
+  // =========================================================================
+
+  describe('checkGitIntegrity', () => {
+    it('should return true when fsck succeeds with clean output', () => {
+      mockExecSync.mockReturnValue('');
+      const result = BuildReliabilityService.checkGitIntegrity('/repo');
+      expect(result).toBe(true);
+      expect(mockExecSync).toHaveBeenCalledWith(
+        'git -C "/repo" fsck --no-dangling',
+        expect.objectContaining({ encoding: 'utf8' }),
+      );
+    });
+
+    it('should return false when fsck output contains corruption indicators', () => {
+      mockExecSync.mockReturnValue('broken link from tree abc123');
+      const result = BuildReliabilityService.checkGitIntegrity('/repo');
+      expect(result).toBe(false);
+    });
+
+    it('should return false when fsck output contains missing objects', () => {
+      mockExecSync.mockReturnValue('missing blob abc123');
+      const result = BuildReliabilityService.checkGitIntegrity('/repo');
+      expect(result).toBe(false);
+    });
+
+    it('should return false when execSync throws (non-zero exit code)', () => {
+      mockExecSync.mockImplementation(() => {
+        const error: any = new Error('fsck failed');
+        error.stderr = Buffer.from('error: bad object HEAD');
+        throw error;
+      });
+      const result = BuildReliabilityService.checkGitIntegrity('/repo');
+      expect(result).toBe(false);
+    });
+
+    it('should use current directory when no repoPath provided', () => {
+      mockExecSync.mockReturnValue('');
+      BuildReliabilityService.checkGitIntegrity();
+      expect(mockExecSync).toHaveBeenCalledWith('git -C "." fsck --no-dangling', expect.anything());
+    });
+  });
+
+  // =========================================================================
+  // cleanStaleLockFiles
+  // =========================================================================
+
+  describe('cleanStaleLockFiles', () => {
+    it('should return 0 when .git directory does not exist', () => {
+      mockFs.existsSync.mockReturnValue(false);
+      const result = BuildReliabilityService.cleanStaleLockFiles('/repo');
+      expect(result).toBe(0);
+    });
+
+    it('should remove lock files older than 10 minutes', () => {
+      const now = Date.now();
+      const oldTime = now - 15 * 60 * 1000; // 15 minutes ago
+
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.statSync.mockImplementation((filePath: any) => {
+        if (filePath === path.join('/repo', '.git')) {
+          return { isDirectory: () => true } as fs.Stats;
+        }
+        return { mtimeMs: oldTime } as fs.Stats;
+      });
+      mockFs.readdirSync.mockImplementation((dir: any) => {
+        if (dir === path.join('/repo', '.git')) {
+          return [
+            { name: 'index.lock', isDirectory: () => false },
+            { name: 'HEAD.lock', isDirectory: () => false },
+          ] as any;
+        }
+        return [];
+      });
+      mockFs.unlinkSync.mockReturnValue(undefined);
+
+      const result = BuildReliabilityService.cleanStaleLockFiles('/repo');
+      expect(result).toBe(2);
+      expect(mockFs.unlinkSync).toHaveBeenCalledTimes(2);
+    });
+
+    it('should NOT remove lock files younger than 10 minutes', () => {
+      const now = Date.now();
+      const recentTime = now - 2 * 60 * 1000; // 2 minutes ago
+
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.statSync.mockImplementation((filePath: any) => {
+        if (filePath === path.join('/repo', '.git')) {
+          return { isDirectory: () => true } as fs.Stats;
+        }
+        return { mtimeMs: recentTime } as fs.Stats;
+      });
+      mockFs.readdirSync.mockImplementation((dir: any) => {
+        if (dir === path.join('/repo', '.git')) {
+          return [{ name: 'index.lock', isDirectory: () => false }] as any;
+        }
+        return [];
+      });
+
+      const result = BuildReliabilityService.cleanStaleLockFiles('/repo');
+      expect(result).toBe(0);
+      expect(mockFs.unlinkSync).not.toHaveBeenCalled();
+    });
+
+    it('should recursively scan refs directory for lock files', () => {
+      const now = Date.now();
+      const oldTime = now - 15 * 60 * 1000;
+
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.statSync.mockImplementation((filePath: any) => {
+        if (filePath === path.join('/repo', '.git')) {
+          return { isDirectory: () => true } as fs.Stats;
+        }
+        return { mtimeMs: oldTime } as fs.Stats;
+      });
+      mockFs.readdirSync.mockImplementation((dir: any) => {
+        const gitDir = path.join('/repo', '.git');
+        if (dir === gitDir) {
+          return [{ name: 'refs', isDirectory: () => true }] as any;
+        }
+        if (dir === path.join(gitDir, 'refs')) {
+          return [{ name: 'heads', isDirectory: () => true }] as any;
+        }
+        if (dir === path.join(gitDir, 'refs', 'heads')) {
+          return [{ name: 'main.lock', isDirectory: () => false }] as any;
+        }
+        return [];
+      });
+      mockFs.unlinkSync.mockReturnValue(undefined);
+
+      const result = BuildReliabilityService.cleanStaleLockFiles('/repo');
+      expect(result).toBe(1);
+    });
+  });
+
+  // =========================================================================
+  // validateSubmoduleBackingStores
+  // =========================================================================
+
+  describe('validateSubmoduleBackingStores', () => {
+    it('should return empty array when .gitmodules does not exist', () => {
+      mockFs.existsSync.mockReturnValue(false);
+      const result = BuildReliabilityService.validateSubmoduleBackingStores('/repo');
+      expect(result).toEqual([]);
+    });
+
+    it('should detect broken backing store for submodule', () => {
+      mockFs.existsSync.mockImplementation((p: any) => {
+        if (p === path.join('/repo', '.gitmodules')) return true;
+        if (p === path.join('/repo', 'lib/sub', '.git')) return true;
+        // Backing store does not exist
+        return false;
+      });
+      mockFs.readFileSync.mockImplementation((p: any) => {
+        if (p === path.join('/repo', '.gitmodules')) {
+          return '[submodule "sub"]\n\tpath = lib/sub\n\turl = https://example.com/sub.git';
+        }
+        if (p === path.join('/repo', 'lib/sub', '.git')) {
+          return 'gitdir: ../../.git/modules/lib/sub';
+        }
+        return '';
+      });
+      mockFs.statSync.mockReturnValue({ isFile: () => true } as fs.Stats);
+
+      const result = BuildReliabilityService.validateSubmoduleBackingStores('/repo');
+      expect(result).toContain('lib/sub');
+    });
+
+    it('should return empty array when all submodule backing stores are valid', () => {
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.readFileSync.mockImplementation((p: any) => {
+        if (p === path.join('/repo', '.gitmodules')) {
+          return '[submodule "sub"]\n\tpath = lib/sub\n\turl = https://example.com/sub.git';
+        }
+        if (p === path.join('/repo', 'lib/sub', '.git')) {
+          return 'gitdir: ../../.git/modules/lib/sub';
+        }
+        return '';
+      });
+      mockFs.statSync.mockReturnValue({ isFile: () => true } as fs.Stats);
+
+      const result = BuildReliabilityService.validateSubmoduleBackingStores('/repo');
+      expect(result).toEqual([]);
+    });
+  });
+
+  // =========================================================================
+  // recoverCorruptedRepo
+  // =========================================================================
+
+  describe('recoverCorruptedRepo', () => {
+    it('should orchestrate fsck cleanup and re-fetch, returning true on success', () => {
+      // cleanStaleLockFiles: no .git dir
+      mockFs.existsSync.mockReturnValue(false);
+      mockFs.statSync.mockReturnValue({ isDirectory: () => false } as fs.Stats);
+
+      // fetch succeeds, then fsck succeeds
+      mockExecSync.mockReturnValue('');
+
+      const result = BuildReliabilityService.recoverCorruptedRepo('/repo');
+      expect(result).toBe(true);
+      // Should have called fetch
+      expect(mockExecSync).toHaveBeenCalledWith('git -C "/repo" fetch --all', expect.anything());
+    });
+
+    it('should return false when recovery fails to restore integrity', () => {
+      mockFs.existsSync.mockReturnValue(false);
+      mockFs.statSync.mockReturnValue({ isDirectory: () => false } as fs.Stats);
+
+      // fetch succeeds, but fsck fails
+      mockExecSync.mockImplementation((cmd: any) => {
+        if (typeof cmd === 'string' && cmd.includes('fetch')) return '';
+        if (typeof cmd === 'string' && cmd.includes('fsck')) {
+          return 'missing blob abc123';
+        }
+        return '';
+      });
+
+      const result = BuildReliabilityService.recoverCorruptedRepo('/repo');
+      expect(result).toBe(false);
+    });
+
+    it('should continue recovery even when fetch fails', () => {
+      mockFs.existsSync.mockReturnValue(false);
+      mockFs.statSync.mockReturnValue({ isDirectory: () => false } as fs.Stats);
+
+      let callCount = 0;
+      mockExecSync.mockImplementation((cmd: any) => {
+        callCount++;
+        if (typeof cmd === 'string' && cmd.includes('fetch')) {
+          throw new Error('network error');
+        }
+        // fsck call
+        return '';
+      });
+
+      const result = BuildReliabilityService.recoverCorruptedRepo('/repo');
+      // Should still attempt fsck after failed fetch
+      expect(callCount).toBeGreaterThanOrEqual(2);
+    });
+  });
+
+  // =========================================================================
+  // cleanReservedFilenames
+  // =========================================================================
+
+  describe('cleanReservedFilenames', () => {
+    it('should return empty array when Assets directory does not exist', () => {
+      mockFs.existsSync.mockReturnValue(false);
+      const result = BuildReliabilityService.cleanReservedFilenames('/project');
+      expect(result).toEqual([]);
+    });
+
+    it('should remove files with reserved names (con, prn, aux, nul)', () => {
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.readdirSync.mockImplementation((dir: any) => {
+        if (dir === path.join('/project', 'Assets')) {
+          return [
+            { name: 'con.txt', isDirectory: () => false },
+            { name: 'PRN.meta', isDirectory: () => false },
+            { name: 'aux.shader', isDirectory: () => false },
+            { name: 'nul.png', isDirectory: () => false },
+            { name: 'valid-file.cs', isDirectory: () => false },
+          ] as any;
+        }
+        return [];
+      });
+      mockFs.unlinkSync.mockReturnValue(undefined);
+
+      const result = BuildReliabilityService.cleanReservedFilenames('/project');
+      expect(result).toHaveLength(4);
+      expect(mockFs.unlinkSync).toHaveBeenCalledTimes(4);
+    });
+
+    it('should remove directories with reserved names', () => {
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.readdirSync.mockImplementation((dir: any) => {
+        if (dir === path.join('/project', 'Assets')) {
+          return [{ name: 'com1', isDirectory: () => true }] as any;
+        }
+        return [];
+      });
+      mockFs.rmSync.mockReturnValue(undefined);
+
+      const result = BuildReliabilityService.cleanReservedFilenames('/project');
+      expect(result).toHaveLength(1);
+      expect(mockFs.rmSync).toHaveBeenCalledWith(path.join('/project', 'Assets', 'com1'), {
+        recursive: true,
+        force: true,
+      });
+    });
+
+    it('should detect COM1 through COM9 and LPT1 through LPT9', () => {
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.readdirSync.mockImplementation((dir: any) => {
+        if (dir === path.join('/project', 'Assets')) {
+          return [
+            { name: 'com1.txt', isDirectory: () => false },
+            { name: 'COM9.meta', isDirectory: () => false },
+            { name: 'lpt1.dat', isDirectory: () => false },
+            { name: 'LPT9.log', isDirectory: () => false },
+          ] as any;
+        }
+        return [];
+      });
+      mockFs.unlinkSync.mockReturnValue(undefined);
+
+      const result = BuildReliabilityService.cleanReservedFilenames('/project');
+      expect(result).toHaveLength(4);
+    });
+
+    it('should not remove files that merely contain reserved names as substrings', () => {
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.readdirSync.mockImplementation((dir: any) => {
+        if (dir === path.join('/project', 'Assets')) {
+          return [
+            { name: 'controller.cs', isDirectory: () => false },
+            { name: 'printer-utils.cs', isDirectory: () => false },
+            { name: 'auxiliary.shader', isDirectory: () => false },
+          ] as any;
+        }
+        return [];
+      });
+
+      const result = BuildReliabilityService.cleanReservedFilenames('/project');
+      expect(result).toHaveLength(0);
+    });
+  });
+
+  // =========================================================================
+  // getAvailableSpaceMB
+  // =========================================================================
+
+  describe('getAvailableSpaceMB', () => {
+    it('should return -1 when the check fails', () => {
+      mockExecFileSync.mockImplementation(() => {
+        throw new Error('Command failed');
+      });
+
+      const result = BuildReliabilityService.getAvailableSpaceMB('/some/path');
+      expect(result).toBe(-1);
+    });
+
+    it('should parse wmic output on Windows', () => {
+      const originalPlatform = process.platform;
+      Object.defineProperty(process, 'platform', { value: 'win32' });
+
+      // 10 GB in bytes
+      mockExecFileSync.mockReturnValue('\r\nFreeSpace=10737418240\r\n' as any);
+
+      const result = BuildReliabilityService.getAvailableSpaceMB('C:\\builds');
+      // 10737418240 / (1024 * 1024) = 10240 MB
+      expect(result).toBeCloseTo(10240, 0);
+
+      Object.defineProperty(process, 'platform', { value: originalPlatform });
+    });
+
+    it('should parse df output on Unix', () => {
+      const originalPlatform = process.platform;
+      Object.defineProperty(process, 'platform', { value: 'linux' });
+
+      mockExecFileSync.mockReturnValue('  Avail\n  5120M\n' as any);
+
+      const result = BuildReliabilityService.getAvailableSpaceMB('/builds');
+      expect(result).toBe(5120);
+
+      Object.defineProperty(process, 'platform', { value: originalPlatform });
+    });
+  });
+
+  // =========================================================================
+  // getDirectorySizeMB
+  // =========================================================================
+
+  describe('getDirectorySizeMB', () => {
+    it('should return file size for a single file', () => {
+      // 5 MB in bytes
+      mockFs.statSync.mockReturnValue({ isDirectory: () => false, size: 5 * 1024 * 1024 } as any);
+
+      const result = BuildReliabilityService.getDirectorySizeMB('/path/to/file.zip');
+      expect(result).toBeCloseTo(5, 0);
+    });
+
+    it('should return total size for a directory tree', () => {
+      const subDir = path.join('/build', 'sub');
+
+      mockFs.statSync.mockImplementation((p: any) => {
+        const pathStr = typeof p === 'string' ? p : p.toString();
+        if (pathStr === '/build' || pathStr === subDir) {
+          return { isDirectory: () => true, size: 0 } as any;
+        }
+
+        return { isDirectory: () => false, size: 1024 * 1024 } as any; // 1 MB each
+      });
+
+      mockFs.readdirSync.mockImplementation((dirPath: any, _options?: any) => {
+        const dirStr = typeof dirPath === 'string' ? dirPath : dirPath.toString();
+        if (dirStr === '/build') {
+          return [
+            { name: 'file1.bin', isDirectory: () => false },
+            { name: 'sub', isDirectory: () => true },
+          ] as any;
+        }
+        if (dirStr === subDir) {
+          return [{ name: 'file2.bin', isDirectory: () => false }] as any;
+        }
+
+        return [] as any;
+      });
+
+      const result = BuildReliabilityService.getDirectorySizeMB('/build');
+      expect(result).toBeCloseTo(2, 0); // 2 files * 1 MB each
+    });
+
+    it('should return -1 when calculation fails', () => {
+      mockFs.statSync.mockImplementation(() => {
+        throw new Error('Access denied');
+      });
+
+      const result = BuildReliabilityService.getDirectorySizeMB('/inaccessible');
+      expect(result).toBe(-1);
+    });
+  });
+
+  // =========================================================================
+  // archiveBuildOutput
+  // =========================================================================
+
+  describe('archiveBuildOutput', () => {
+    it('should skip archiving when source path does not exist', () => {
+      mockFs.existsSync.mockReturnValue(false);
+      BuildReliabilityService.archiveBuildOutput('/builds/output', '/archives');
+      expect(mockExecSync).not.toHaveBeenCalled();
+    });
+
+    it('should create archive directory and tar.gz output', () => {
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.mkdirSync.mockReturnValue(undefined as any);
+      mockExecSync.mockReturnValue('');
+      // Make disk space check return unknown so we proceed
+      mockExecFileSync.mockImplementation(() => {
+        throw new Error('Command not found');
+      });
+      mockFs.statSync.mockImplementation(() => {
+        throw new Error('Not mocked');
+      });
+
+      BuildReliabilityService.archiveBuildOutput('/builds/output', '/archives');
+
+      expect(mockFs.mkdirSync).toHaveBeenCalledWith('/archives', { recursive: true });
+      expect(mockExecSync).toHaveBeenCalledWith(expect.stringContaining('tar -czf'), expect.anything());
+    });
+
+    it('should skip archival when insufficient disk space', () => {
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.mkdirSync.mockReturnValue(undefined as any);
+
+      // Source is 1000 MB
+      mockFs.statSync.mockImplementation((p: any) => {
+        const pathStr = typeof p === 'string' ? p : p.toString();
+        if (pathStr.endsWith('big-file.bin')) {
+          return { isDirectory: () => false, size: 1000 * 1024 * 1024 } as any;
+        }
+        return { isDirectory: () => true, size: 0 } as any;
+      });
+      mockFs.readdirSync.mockImplementation(() => {
+        return [{ name: 'big-file.bin', isDirectory: () => false }] as any;
+      });
+
+      // Only 500 MB available
+      const originalPlatform = process.platform;
+      Object.defineProperty(process, 'platform', { value: 'linux' });
+      mockExecFileSync.mockReturnValue('  Avail\n  500M\n' as any);
+
+      BuildReliabilityService.archiveBuildOutput('/builds/output', '/archives');
+
+      // Should NOT have attempted the tar command
+      expect(mockExecSync).not.toHaveBeenCalledWith(expect.stringContaining('tar'), expect.anything());
+
+      Object.defineProperty(process, 'platform', { value: originalPlatform });
+    });
+
+    it('should clean up partial archive on tar failure', () => {
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.mkdirSync.mockReturnValue(undefined as any);
+      mockFs.unlinkSync.mockReturnValue(undefined);
+
+      // Make disk space check return unknown so we proceed
+      mockExecFileSync.mockImplementation(() => {
+        throw new Error('Command not found');
+      });
+      mockFs.statSync.mockImplementation(() => {
+        throw new Error('Not mocked');
+      });
+
+      // tar command fails
+      mockExecSync.mockImplementation(() => {
+        const error: any = new Error('tar failed');
+        error.stderr = Buffer.from('No space left on device');
+        throw error;
+      });
+
+      BuildReliabilityService.archiveBuildOutput('/builds/output', '/archives');
+
+      // Should have attempted to clean up the partial archive
+      // (existsSync returns true for the partial file)
+      expect(mockFs.unlinkSync).toHaveBeenCalled();
+    });
+
+    it('should proceed with warning when disk space check fails', () => {
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.mkdirSync.mockReturnValue(undefined as any);
+      mockExecSync.mockReturnValue('');
+
+      // Disk space check fails
+      mockExecFileSync.mockImplementation(() => {
+        throw new Error('Command not found');
+      });
+      // Directory size check also fails
+      mockFs.statSync.mockImplementation(() => {
+        throw new Error('Not mocked');
+      });
+
+      BuildReliabilityService.archiveBuildOutput('/builds/output', '/archives');
+
+      // Should still proceed with tar
+      expect(mockExecSync).toHaveBeenCalledWith(expect.stringContaining('tar -czf'), expect.anything());
+    });
+  });
+
+  // =========================================================================
+  // enforceRetention
+  // =========================================================================
+
+  describe('enforceRetention', () => {
+    it('should return 0 when archive path does not exist', () => {
+      mockFs.existsSync.mockReturnValue(false);
+      const result = BuildReliabilityService.enforceRetention('/archive', 30);
+      expect(result).toBe(0);
+    });
+
+    it('should remove archives older than retention period', () => {
+      const now = Date.now();
+      const oldTime = now - 45 * 24 * 60 * 60 * 1000; // 45 days ago
+      const recentTime = now - 5 * 24 * 60 * 60 * 1000; // 5 days ago
+
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.readdirSync.mockReturnValue([
+        { name: 'build-old.tar.gz', isDirectory: () => false },
+        { name: 'build-recent.tar.gz', isDirectory: () => false },
+      ] as any);
+      mockFs.statSync.mockImplementation((p: any) => {
+        if ((p as string).includes('old')) {
+          return { mtimeMs: oldTime } as fs.Stats;
+        }
+        return { mtimeMs: recentTime } as fs.Stats;
+      });
+      mockFs.unlinkSync.mockReturnValue(undefined);
+
+      const result = BuildReliabilityService.enforceRetention('/archive', 30);
+      expect(result).toBe(1);
+      expect(mockFs.unlinkSync).toHaveBeenCalledTimes(1);
+    });
+
+    it('should keep all archives within retention period', () => {
+      const now = Date.now();
+      const recentTime = now - 5 * 24 * 60 * 60 * 1000;
+
+      mockFs.existsSync.mockReturnValue(true);
+      mockFs.readdirSync.mockReturnValue([
+        { name: 'build-1.tar.gz', isDirectory: () => false },
+        { name: 'build-2.tar.gz', isDirectory: () => false },
+      ] as any);
+      mockFs.statSync.mockReturnValue({ mtimeMs: recentTime } as fs.Stats);
+
+      const result = BuildReliabilityService.enforceRetention('/archive', 30);
+      expect(result).toBe(0);
+    });
+  });
+
+  // =========================================================================
+  // configureGitEnvironment
+  // =========================================================================
+
+  describe('configureGitEnvironment', () => {
+    it('should set GIT_TERMINAL_PROMPT=0 in process.env', () => {
+      mockExecSync.mockReturnValue('');
+      BuildReliabilityService.configureGitEnvironment();
+      expect(process.env.GIT_TERMINAL_PROMPT).toBe('0');
+    });
+
+    it('should configure http.postBuffer via git config', () => {
+      mockExecSync.mockReturnValue('');
+      BuildReliabilityService.configureGitEnvironment();
+      expect(mockExecSync).toHaveBeenCalledWith('git config --global http.postBuffer 524288000', expect.anything());
+    });
+
+    it('should configure core.longpaths via git config', () => {
+      mockExecSync.mockReturnValue('');
+      BuildReliabilityService.configureGitEnvironment();
+      expect(mockExecSync).toHaveBeenCalledWith('git config --global core.longpaths true', expect.anything());
+    });
+
+    it('should warn but not throw when git config commands fail', () => {
+      const core = require('@actions/core');
+      mockExecSync.mockImplementation(() => {
+        throw new Error('git config failed');
+      });
+
+      // Should not throw
+      expect(() => BuildReliabilityService.configureGitEnvironment()).not.toThrow();
+      expect(core.warning).toHaveBeenCalled();
+    });
+  });
+});

src/model/orchestrator/services/reliability/build-reliability-service.ts

@@ -0,0 +1,527 @@
+import { execSync, execFileSync } from 'node:child_process';
+import fs from 'node:fs';
+import path from 'node:path';
+import * as core from '@actions/core';
+
+/**
+ * Build reliability features for hardening CI pipelines.
+ * Provides git integrity checks, stale lock cleanup, submodule validation,
+ * reserved filename removal, build archival, and git environment configuration.
+ * All features are opt-in and fail gracefully (warnings only).
+ */
+export class BuildReliabilityService {
+  // Windows reserved device names that cause Unity asset importer infinite loops
+  private static readonly RESERVED_NAMES = new Set([
+    'con',
+    'prn',
+    'aux',
+    'nul',
+    'com1',
+    'com2',
+    'com3',
+    'com4',
+    'com5',
+    'com6',
+    'com7',
+    'com8',
+    'com9',
+    'lpt1',
+    'lpt2',
+    'lpt3',
+    'lpt4',
+    'lpt5',
+    'lpt6',
+    'lpt7',
+    'lpt8',
+    'lpt9',
+  ]);
+
+  // Lock files to look for in the .git directory
+  private static readonly LOCK_FILE_NAMES = new Set(['index.lock', 'shallow.lock', 'config.lock', 'HEAD.lock']);
+
+  // Maximum age in milliseconds before a lock file is considered stale (10 minutes)
+  private static readonly LOCK_FILE_MAX_AGE_MS = 10 * 60 * 1000;
+
+  /**
+   * Run git fsck to check repository integrity.
+   * Returns true if the repo is healthy, false if corruption detected.
+   */
+  static checkGitIntegrity(repoPath: string = '.'): boolean {
+    core.info(`[Reliability] Checking git integrity in ${repoPath}`);
+
+    try {
+      const output = execSync(`git -C "${repoPath}" fsck --no-dangling`, {
+        encoding: 'utf8',
+        timeout: 120_000,
+        stdio: ['pipe', 'pipe', 'pipe'],
+      });
+
+      // Parse output for corruption indicators
+      const corruptionPatterns = [
+        /broken link/i,
+        /missing (blob|tree|commit|tag)/i,
+        /dangling/i,
+        /corrupt/i,
+        /error in /i,
+      ];
+
+      for (const pattern of corruptionPatterns) {
+        if (pattern.test(output)) {
+          core.warning(`[Reliability] Git integrity check found issues: ${output.trim()}`);
+          return false;
+        }
+      }
+
+      core.info('[Reliability] Git integrity check passed');
+      return true;
+    } catch (error: any) {
+      // execSync throws on non-zero exit code
+      const stderr = error.stderr?.toString() ?? error.message;
+      core.warning(`[Reliability] Git integrity check failed: ${stderr}`);
+      return false;
+    }
+  }
+
+  /**
+   * Remove stale .lock files from the .git directory.
+   * Only removes lock files older than 10 minutes to avoid interfering with active operations.
+   * Returns the number of lock files removed.
+   */
+  static cleanStaleLockFiles(repoPath: string = '.'): number {
+    const gitDir = path.join(repoPath, '.git');
+    if (!fs.existsSync(gitDir) || !fs.statSync(gitDir).isDirectory()) {
+      return 0;
+    }
+
+    core.info(`[Reliability] Scanning for stale lock files in ${gitDir}`);
+    const now = Date.now();
+    let removed = 0;
+
+    const cleanDirectory = (directory: string): void => {
+      if (!fs.existsSync(directory)) return;
+
+      try {
+        const entries = fs.readdirSync(directory, { withFileTypes: true });
+        for (const entry of entries) {
+          const fullPath = path.join(directory, entry.name);
+          if (entry.isDirectory()) {
+            cleanDirectory(fullPath);
+          } else if (entry.name.endsWith('.lock')) {
+            // Check if it is a known lock file location OR under refs/
+            const relativePath = path.relative(gitDir, fullPath);
+            const isKnownLock = BuildReliabilityService.LOCK_FILE_NAMES.has(entry.name);
+            const isRefsLock = relativePath.startsWith('refs' + path.sep);
+
+            if (isKnownLock || isRefsLock) {
+              try {
+                const stat = fs.statSync(fullPath);
+                const ageMs = now - stat.mtimeMs;
+
+                if (ageMs > BuildReliabilityService.LOCK_FILE_MAX_AGE_MS) {
+                  fs.unlinkSync(fullPath);
+                  removed++;
+                  core.info(
+                    `[Reliability] Removed stale lock file (age: ${Math.round(ageMs / 1000)}s): ${relativePath}`,
+                  );
+                } else {
+                  core.info(
+                    `[Reliability] Lock file is recent (age: ${Math.round(ageMs / 1000)}s), skipping: ${relativePath}`,
+                  );
+                }
+              } catch {
+                core.warning(`[Reliability] Could not remove lock file: ${fullPath}`);
+              }
+            }
+          }
+        }
+      } catch {
+        // Directory not accessible
+      }
+    };
+
+    cleanDirectory(gitDir);
+
+    if (removed > 0) {
+      core.info(`[Reliability] Cleaned ${removed} stale lock file(s)`);
+    } else {
+      core.info('[Reliability] No stale lock files found');
+    }
+
+    return removed;
+  }
+
+  /**
+   * Validate that submodule .git files point to existing backing stores
+   * under .git/modules/. Returns list of submodule paths with broken backing stores.
+   */
+  static validateSubmoduleBackingStores(repoPath: string = '.'): string[] {
+    const broken: string[] = [];
+    const gitmodulesPath = path.join(repoPath, '.gitmodules');
+
+    if (!fs.existsSync(gitmodulesPath)) {
+      core.info('[Reliability] No .gitmodules found, skipping submodule validation');
+      return broken;
+    }
+
+    core.info(`[Reliability] Validating submodule backing stores in ${repoPath}`);
+
+    try {
+      const content = fs.readFileSync(gitmodulesPath, 'utf8');
+      const pathMatches = content.matchAll(/path\s*=\s*(.+)/g);
+
+      for (const match of pathMatches) {
+        const submodulePath = match[1].trim();
+        const gitFile = path.join(repoPath, submodulePath, '.git');
+
+        if (!fs.existsSync(gitFile)) {
+          // Submodule not initialized -- not necessarily broken
+          continue;
+        }
+
+        try {
+          const stat = fs.statSync(gitFile);
+          if (stat.isFile()) {
+            // .git is a file -- should contain "gitdir: <path>"
+            const gitFileContent = fs.readFileSync(gitFile, 'utf8').trim();
+            const gitdirMatch = gitFileContent.match(/^gitdir:\s*(.+)$/);
+
+            if (gitdirMatch) {
+              const backingStore = path.resolve(path.join(repoPath, submodulePath), gitdirMatch[1]);
+              if (!fs.existsSync(backingStore)) {
+                broken.push(submodulePath);
+                core.warning(`[Reliability] Submodule ${submodulePath} has broken backing store: ${backingStore}`);
+              } else {
+                core.info(`[Reliability] Submodule ${submodulePath} backing store OK`);
+              }
+            } else {
+              broken.push(submodulePath);
+              core.warning(`[Reliability] Submodule ${submodulePath} .git file has invalid format`);
+            }
+          }
+        } catch {
+          // Can't read .git file
+          core.warning(`[Reliability] Could not read .git file for submodule: ${submodulePath}`);
+        }
+      }
+    } catch (error: any) {
+      core.warning(`[Reliability] Could not read .gitmodules: ${error.message}`);
+    }
+
+    if (broken.length > 0) {
+      core.warning(`[Reliability] ${broken.length} submodule(s) have broken backing stores`);
+    } else {
+      core.info('[Reliability] All submodule backing stores are valid');
+    }
+
+    return broken;
+  }
+
+  /**
+   * Orchestrate recovery of a corrupted repository.
+   * Sequence: fsck -> clean locks -> re-fetch -> retry fsck.
+   * Returns true if recovery succeeded.
+   */
+  static recoverCorruptedRepo(repoPath: string = '.'): boolean {
+    core.warning(`[Reliability] Attempting automatic recovery for ${repoPath}`);
+
+    // Step 1: Clean stale lock files that may be preventing operations
+    const locksRemoved = BuildReliabilityService.cleanStaleLockFiles(repoPath);
+    if (locksRemoved > 0) {
+      core.info(`[Reliability] Recovery: cleaned ${locksRemoved} lock file(s)`);
+    }
+
+    // Step 2: Re-fetch to restore missing objects
+    try {
+      core.info('[Reliability] Recovery: re-fetching from remote');
+      execSync(`git -C "${repoPath}" fetch --all`, {
+        encoding: 'utf8',
+        timeout: 300_000,
+        stdio: ['pipe', 'pipe', 'pipe'],
+      });
+      core.info('[Reliability] Recovery: fetch completed');
+    } catch (error: any) {
+      core.warning(`[Reliability] Recovery: fetch failed: ${error.stderr?.toString() ?? error.message}`);
+    }
+
+    // Step 3: Retry fsck
+    const healthy = BuildReliabilityService.checkGitIntegrity(repoPath);
+    if (healthy) {
+      core.info('[Reliability] Recovery succeeded -- repository is healthy');
+    } else {
+      core.warning('[Reliability] Recovery failed -- repository still has integrity issues');
+    }
+
+    return healthy;
+  }
+
+  /**
+   * Scan a directory tree for files/directories with Windows reserved names.
+   * These names (con, prn, aux, nul, com1-9, lpt1-9) with any extension
+   * cause Unity asset importer infinite loops on Windows.
+   * Returns list of paths that were removed.
+   */
+  static cleanReservedFilenames(projectPath: string): string[] {
+    const assetsPath = path.join(projectPath, 'Assets');
+    if (!fs.existsSync(assetsPath)) {
+      core.info(`[Reliability] No Assets directory found at ${assetsPath}, skipping reserved filename scan`);
+      return [];
+    }
+
+    core.info(`[Reliability] Scanning for reserved filenames in ${assetsPath}`);
+    const cleaned: string[] = [];
+
+    const scanDirectory = (directory: string): void => {
+      try {
+        const entries = fs.readdirSync(directory, { withFileTypes: true });
+        for (const entry of entries) {
+          const nameWithoutExtension = entry.name.split('.')[0].toLowerCase();
+          const fullPath = path.join(directory, entry.name);
+
+          if (BuildReliabilityService.RESERVED_NAMES.has(nameWithoutExtension)) {
+            try {
+              if (entry.isDirectory()) {
+                fs.rmSync(fullPath, { recursive: true, force: true });
+              } else {
+                fs.unlinkSync(fullPath);
+              }
+              cleaned.push(fullPath);
+              core.warning(`[Reliability] Removed reserved filename: ${fullPath}`);
+            } catch {
+              core.warning(`[Reliability] Could not remove reserved filename: ${fullPath}`);
+            }
+          } else if (entry.isDirectory()) {
+            scanDirectory(fullPath);
+          }
+        }
+      } catch {
+        // Directory not accessible
+      }
+    };
+
+    scanDirectory(assetsPath);
+
+    if (cleaned.length > 0) {
+      core.warning(`[Reliability] Cleaned ${cleaned.length} reserved filename(s)`);
+    } else {
+      core.info('[Reliability] No reserved filenames found');
+    }
+
+    return cleaned;
+  }
+
+  /**
+   * Get available disk space in megabytes for a given directory.
+   * Returns -1 if the check fails (unknown space).
+   *
+   * Cross-platform: uses wmic on Windows, df on Unix.
+   */
+  static getAvailableSpaceMB(directoryPath: string): number {
+    try {
+      if (process.platform === 'win32') {
+        const drive = path.parse(directoryPath).root;
+        const driveLetter = drive.replace(/[:\\\/]/g, '');
+        const output = execFileSync(
+          'wmic',
+          ['logicaldisk', 'where', `DeviceID='${driveLetter}:'`, 'get', 'FreeSpace', '/value'],
+          { encoding: 'utf8', timeout: 10_000 },
+        );
+        const match = output.match(/FreeSpace=(\d+)/);
+
+        return match ? Number.parseInt(match[1], 10) / (1024 * 1024) : -1;
+      } else {
+        const output = execFileSync('df', ['-BM', '--output=avail', directoryPath], {
+          encoding: 'utf8',
+          timeout: 10_000,
+        });
+        const lines = output.trim().split('\n');
+
+        return Number.parseInt(lines[lines.length - 1], 10);
+      }
+    } catch {
+      return -1; // Unknown, caller should proceed with warning
+    }
+  }
+
+  /**
+   * Calculate the total size of a directory in megabytes.
+   * Returns -1 if the calculation fails.
+   */
+  static getDirectorySizeMB(directoryPath: string): number {
+    try {
+      const stat = fs.statSync(directoryPath);
+      if (!stat.isDirectory()) {
+        return stat.size / (1024 * 1024);
+      }
+
+      let totalBytes = 0;
+      const walkDirectory = (dir: string): void => {
+        const entries = fs.readdirSync(dir, { withFileTypes: true });
+        for (const entry of entries) {
+          const fullPath = path.join(dir, entry.name);
+          if (entry.isDirectory()) {
+            walkDirectory(fullPath);
+          } else {
+            try {
+              totalBytes += fs.statSync(fullPath).size;
+            } catch {
+              // Skip inaccessible files
+            }
+          }
+        }
+      };
+
+      walkDirectory(directoryPath);
+
+      return totalBytes / (1024 * 1024);
+    } catch {
+      return -1;
+    }
+  }
+
+  /**
+   * Create a tar.gz archive of build output.
+   *
+   * Validates disk space before archiving. Skips archival with a warning
+   * if insufficient space is detected, preventing partial writes on full disks.
+   */
+  static archiveBuildOutput(sourcePath: string, archivePath: string): void {
+    if (!fs.existsSync(sourcePath)) {
+      core.info(`[Reliability] No build output to archive at ${sourcePath}`);
+      return;
+    }
+
+    fs.mkdirSync(archivePath, { recursive: true });
+
+    // Check available disk space before archiving
+    const sourceSizeMB = BuildReliabilityService.getDirectorySizeMB(sourcePath);
+    const availableSpaceMB = BuildReliabilityService.getAvailableSpaceMB(archivePath);
+
+    if (sourceSizeMB >= 0 && availableSpaceMB >= 0) {
+      const neededMB = Math.ceil(sourceSizeMB * 1.1); // 10% safety margin
+      if (availableSpaceMB < neededMB) {
+        core.warning(
+          `[Reliability] Insufficient disk space for archive. ` +
+            `Need ~${neededMB}MB, available: ${Math.floor(availableSpaceMB)}MB. Skipping archive.`,
+        );
+        return;
+      }
+      core.info(
+        `[Reliability] Disk space check passed: need ~${neededMB}MB, available: ${Math.floor(availableSpaceMB)}MB`,
+      );
+    } else if (availableSpaceMB < 0) {
+      core.warning('[Reliability] Could not determine available disk space. Proceeding with archive cautiously.');
+    }
+
+    const timestamp = new Date().toISOString().replace(/[.:]/g, '-');
+    const archiveFile = path.join(archivePath, `build-${timestamp}.tar.gz`);
+
+    try {
+      execSync(`tar -czf "${archiveFile}" -C "${path.dirname(sourcePath)}" "${path.basename(sourcePath)}"`, {
+        encoding: 'utf8',
+        timeout: 600_000,
+        stdio: ['pipe', 'pipe', 'pipe'],
+      });
+      core.info(`[Reliability] Build output archived to ${archiveFile}`);
+    } catch (error: any) {
+      core.warning(`[Reliability] Failed to archive build output: ${error.stderr?.toString() ?? error.message}`);
+
+      // Clean up partial archive if it exists to avoid leaving corrupted files
+      try {
+        if (fs.existsSync(archiveFile)) {
+          fs.unlinkSync(archiveFile);
+          core.info(`[Reliability] Cleaned up partial archive: ${archiveFile}`);
+        }
+      } catch {
+        // Best-effort cleanup
+      }
+    }
+  }
+
+  /**
+   * Enforce retention policy -- delete archives older than the retention period.
+   * Returns the number of old archives removed.
+   */
+  static enforceRetention(archivePath: string, retentionDays: number): number {
+    if (!fs.existsSync(archivePath)) {
+      return 0;
+    }
+
+    const now = Date.now();
+    const retentionMs = retentionDays * 24 * 60 * 60 * 1000;
+    let removed = 0;
+
+    try {
+      const entries = fs.readdirSync(archivePath, { withFileTypes: true });
+      for (const entry of entries) {
+        const fullPath = path.join(archivePath, entry.name);
+        try {
+          const stat = fs.statSync(fullPath);
+          const ageMs = now - stat.mtimeMs;
+
+          if (ageMs > retentionMs) {
+            if (entry.isDirectory()) {
+              fs.rmSync(fullPath, { recursive: true, force: true });
+            } else {
+              fs.unlinkSync(fullPath);
+            }
+            removed++;
+            core.info(
+              `[Reliability] Removed old archive: ${entry.name} (age: ${Math.round(
+                ageMs / (24 * 60 * 60 * 1000),
+              )} days)`,
+            );
+          }
+        } catch {
+          core.warning(`[Reliability] Could not process archive entry: ${fullPath}`);
+        }
+      }
+    } catch {
+      core.warning(`[Reliability] Could not read archive directory: ${archivePath}`);
+      return 0;
+    }
+
+    if (removed > 0) {
+      core.info(
+        `[Reliability] Retention enforced: removed ${removed} old archive(s), retention: ${retentionDays} days`,
+      );
+    }
+
+    return removed;
+  }
+
+  /**
+   * Configure git environment variables for CI reliability.
+   * Sets GIT_TERMINAL_PROMPT=0, increases http.postBuffer, enables core.longpaths.
+   */
+  static configureGitEnvironment(): void {
+    core.info('[Reliability] Configuring git environment for CI');
+
+    // Prevent git from prompting for credentials (hangs in CI)
+    process.env.GIT_TERMINAL_PROMPT = '0';
+    core.info('[Reliability] Set GIT_TERMINAL_PROMPT=0');
+
+    try {
+      // Increase http.postBuffer to 500MB for large pushes
+      execSync('git config --global http.postBuffer 524288000', {
+        encoding: 'utf8',
+        timeout: 10_000,
+        stdio: ['pipe', 'pipe', 'pipe'],
+      });
+      core.info('[Reliability] Set http.postBuffer=524288000 (500MB)');
+    } catch (error: any) {
+      core.warning(`[Reliability] Could not set http.postBuffer: ${error.message}`);
+    }
+
+    try {
+      // Enable long paths on Windows
+      execSync('git config --global core.longpaths true', {
+        encoding: 'utf8',
+        timeout: 10_000,
+        stdio: ['pipe', 'pipe', 'pipe'],
+      });
+      core.info('[Reliability] Set core.longpaths=true');
+    } catch (error: any) {
+      core.warning(`[Reliability] Could not set core.longpaths: ${error.message}`);
+    }
+  }
+}

src/model/orchestrator/services/reliability/index.ts

@@ -0,0 +1 @@
+export { BuildReliabilityService } from './build-reliability-service';