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

@@ -279,30 +279,35 @@ inputs:
     description:
       '[Orchestrator] Specifies the repo for the unity builder. Useful if you forked the repo for testing, features, or
       fixes.'
-  gitIntegrityCheck:
-    description: 'Run git integrity checks before build (fsck, lock cleanup, submodule validation)'
+
+  hotRunnerEnabled:
+    description: '[HotRunner] Use persistent hot runner for builds (requires pre-registered runners)'
     required: false
     default: 'false'
-  gitAutoRecover:
-    description: 'Attempt automatic recovery if git corruption is detected'
+  hotRunnerTransport:
+    description: '[HotRunner] Transport protocol for hot runner communication: websocket, grpc, named-pipe'
     required: false
-    default: 'false'
-  cleanReservedFilenames:
-    description: 'Remove Windows reserved filenames that cause Unity import loops'
+    default: 'websocket'
+  hotRunnerHost:
+    description: '[HotRunner] Hot runner host address'
     required: false
-    default: 'false'
-  buildArchiveEnabled:
-    description: 'Archive build output after successful build'
+    default: 'localhost'
+  hotRunnerPort:
+    description: '[HotRunner] Hot runner port number'
     required: false
-    default: 'false'
-  buildArchivePath:
-    description: 'Path to store build archives'
-    required: false
-    default: './build-archives'
-  buildArchiveRetention:
-    description: 'Days to retain build archives before cleanup'
+    default: '9090'
+  hotRunnerHealthInterval:
+    description: '[HotRunner] Health check interval in seconds'
     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

@@ -3,7 +3,8 @@ 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 { BuildReliabilityService } from './model/orchestrator/services/reliability';
+import { HotRunnerService } from './model/orchestrator/services/hot-runner';
+import { HotRunnerConfig } from './model/orchestrator/services/hot-runner/hot-runner-types';
 
 async function runMain() {
   try {
@@ -15,63 +16,58 @@ 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);
 
-    // Pre-build reliability checks
-    if (buildParameters.gitIntegrityCheck) {
-      core.info('Running git integrity checks...');
-
-      const isHealthy = BuildReliabilityService.checkGitIntegrity(workspace);
-      BuildReliabilityService.cleanStaleLockFiles(workspace);
-      BuildReliabilityService.validateSubmoduleBackingStores(workspace);
-
-      if (buildParameters.cleanReservedFilenames) {
-        BuildReliabilityService.cleanReservedFilenames(buildParameters.projectPath);
-      }
-
-      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.cleanReservedFilenames) {
-      // cleanReservedFilenames can run independently of gitIntegrityCheck
-      BuildReliabilityService.cleanReservedFilenames(buildParameters.projectPath);
-    }
-
     let exitCode = -1;
 
-    if (buildParameters.providerStrategy === 'local') {
+    // 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 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
+      };
+
+      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;
+        }
+      }
+    } else if (buildParameters.providerStrategy === 'local') {
       core.info('Building locally');
-      await PlatformSetup.setup(buildParameters, actionFolder);
-      exitCode =
-        process.platform === 'darwin'
-          ? await MacBuilder.run(actionFolder)
-          : await Docker.run(baseImage.toString(), {
-              workspace,
-              actionFolder,
-              ...buildParameters,
-            });
+      exitCode = await runColdBuild(buildParameters, baseImage, workspace, actionFolder);
     } 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);
@@ -85,4 +81,28 @@ 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

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

src/model/input.ts

@@ -282,38 +282,38 @@ class Input {
     return Input.getInput('skipActivation')?.toLowerCase() ?? 'false';
   }
 
-  static get gitIntegrityCheck(): boolean {
-    const input = Input.getInput('gitIntegrityCheck') ?? 'false';
+  static get hotRunnerEnabled(): boolean {
+    const input = Input.getInput('hotRunnerEnabled') ?? false;
 
     return input === 'true';
   }
 
-  static get gitAutoRecover(): boolean {
-    const input = Input.getInput('gitAutoRecover') ?? 'false';
+  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';
 
     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

@@ -0,0 +1,5 @@
+# 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

@@ -0,0 +1,159 @@
+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

@@ -0,0 +1,186 @@
+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

@@ -0,0 +1,315 @@
+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

@@ -0,0 +1,166 @@
+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

@@ -0,0 +1,54 @@
+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

@@ -0,0 +1,740 @@
+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

@@ -0,0 +1,11 @@
+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

@@ -1,638 +0,0 @@
-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

@@ -1,527 +0,0 @@
-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

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