diff --git a/internal-packages/run-engine/src/engine/retrying.ts b/internal-packages/run-engine/src/engine/retrying.ts
index 8001c5d8a2..6099d5b649 100644
--- a/internal-packages/run-engine/src/engine/retrying.ts
+++ b/internal-packages/run-engine/src/engine/retrying.ts
@@ -37,6 +37,10 @@ export type RetryOutcome =
       settings: TaskRunExecutionRetry;
       machine?: string;
       wasOOMError?: boolean;
+      // Current usage values for calculating updated totals
+      usageDurationMs: number;
+      costInCents: number;
+      machinePreset: string | null;
     };
 
 export async function retryOutcomeFromCompletion(
@@ -70,6 +74,9 @@ export async function retryOutcomeFromCompletion(
       machine: oomResult.machine,
       settings: { timestamp: Date.now() + delay, delay },
       wasOOMError: true,
+      usageDurationMs: oomResult.usageDurationMs,
+      costInCents: oomResult.costInCents,
+      machinePreset: oomResult.machinePreset,
     };
   }
 
@@ -87,7 +94,7 @@ export async function retryOutcomeFromCompletion(
     return { outcome: "fail_run", sanitizedError };
   }
 
-  // Get the run settings
+  // Get the run settings and current usage values
   const run = await prisma.taskRun.findFirst({
     where: {
       id: runId,
@@ -95,6 +102,9 @@ export async function retryOutcomeFromCompletion(
     select: {
       maxAttempts: true,
       lockedRetryConfig: true,
+      usageDurationMs: true,
+      costInCents: true,
+      machinePreset: true,
     },
   });
 
@@ -151,6 +161,9 @@ export async function retryOutcomeFromCompletion(
       outcome: "retry",
       method: "queue", // we'll always retry on the queue because usually having no settings means something bad happened
       settings: retrySettings,
+      usageDurationMs: run.usageDurationMs,
+      costInCents: run.costInCents,
+      machinePreset: run.machinePreset,
     };
   }
 
@@ -158,13 +171,22 @@ export async function retryOutcomeFromCompletion(
     outcome: "retry",
     method: retryUsingQueue ? "queue" : "immediate",
     settings: retrySettings,
+    usageDurationMs: run.usageDurationMs,
+    costInCents: run.costInCents,
+    machinePreset: run.machinePreset,
   };
 }
 
 async function retryOOMOnMachine(
   prisma: PrismaClientOrTransaction,
   runId: string
-): Promise<{ machine: string; retrySettings: RetryOptions } | undefined> {
+): Promise<{
+  machine: string;
+  retrySettings: RetryOptions;
+  usageDurationMs: number;
+  costInCents: number;
+  machinePreset: string | null;
+} | undefined> {
   try {
     const run = await prisma.taskRun.findFirst({
       where: {
@@ -173,6 +195,8 @@ async function retryOOMOnMachine(
       select: {
         machinePreset: true,
         lockedRetryConfig: true,
+        usageDurationMs: true,
+        costInCents: true,
       },
     });
 
@@ -201,7 +225,13 @@ async function retryOOMOnMachine(
       return;
     }
 
-    return { machine: retryMachine, retrySettings: parsedRetryConfig.data };
+    return {
+      machine: retryMachine,
+      retrySettings: parsedRetryConfig.data,
+      usageDurationMs: run.usageDurationMs,
+      costInCents: run.costInCents,
+      machinePreset: run.machinePreset,
+    };
   } catch (error) {
     console.error("[FailedTaskRunRetryHelper] Failed to get execution retry", {
       runId,
diff --git a/internal-packages/run-engine/src/engine/systems/runAttemptSystem.ts b/internal-packages/run-engine/src/engine/systems/runAttemptSystem.ts
index 70c9e9686a..fb8c833f16 100644
--- a/internal-packages/run-engine/src/engine/systems/runAttemptSystem.ts
+++ b/internal-packages/run-engine/src/engine/systems/runAttemptSystem.ts
@@ -175,7 +175,7 @@ export class RunAttemptSystem {
   }
 
   public async resolveTaskRunContext(runId: string): Promise<TaskRunContext> {
-    const run = await this.$.prisma.taskRun.findFirst({
+    const run = await this.$.readOnlyPrisma.taskRun.findFirst({
       where: {
         id: runId,
       },
@@ -233,9 +233,9 @@ export class RunAttemptSystem {
       run.lockedById
         ? this.#resolveTaskRunExecutionTask(run.lockedById)
         : Promise.resolve({
-            id: run.taskIdentifier,
-            filePath: "unknown",
-          }),
+          id: run.taskIdentifier,
+          filePath: "unknown",
+        }),
       this.#resolveTaskRunExecutionQueue({
         runId,
         lockedQueueId: run.lockedQueueId ?? undefined,
@@ -247,13 +247,13 @@ export class RunAttemptSystem {
       run.lockedById
         ? this.#resolveTaskRunExecutionMachinePreset(run.lockedById, run.machinePreset)
         : Promise.resolve(
-            getMachinePreset({
-              defaultMachine: this.options.machines.defaultMachine,
-              machines: this.options.machines.machines,
-              config: undefined,
-              run,
-            })
-          ),
+          getMachinePreset({
+            defaultMachine: this.options.machines.defaultMachine,
+            machines: this.options.machines.machines,
+            config: undefined,
+            run,
+          })
+        ),
       run.lockedById
         ? this.#resolveTaskRunExecutionDeployment(run.lockedById)
         : Promise.resolve(undefined),
@@ -337,7 +337,7 @@ export class RunAttemptSystem {
             });
           }
 
-          const taskRun = await prisma.taskRun.findFirst({
+          const taskRun = await this.$.readOnlyPrisma.taskRun.findFirst({
             where: {
               id: runId,
             },
@@ -460,9 +460,8 @@ export class RunAttemptSystem {
                 run,
                 snapshot: {
                   executionStatus: "EXECUTING",
-                  description: `Attempt created, starting execution${
-                    isWarmStart ? " (warm start)" : ""
-                  }`,
+                  description: `Attempt created, starting execution${isWarmStart ? " (warm start)" : ""
+                    }`,
                 },
                 previousSnapshotId: latestSnapshot.id,
                 environmentId: latestSnapshot.environmentId,
@@ -621,8 +620,8 @@ export class RunAttemptSystem {
             deployment,
             batch: updatedRun.batchId
               ? {
-                  id: BatchId.toFriendlyId(updatedRun.batchId),
-                }
+                id: BatchId.toFriendlyId(updatedRun.batchId),
+              }
               : undefined,
           };
 
@@ -707,9 +706,34 @@ export class RunAttemptSystem {
           }
 
           span.setAttribute("completionStatus", completion.ok);
+          span.setAttribute("runId", runId);
 
           const completedAt = new Date();
 
+          // Read current usage values to calculate new totals (safe under runLock)
+          const currentRun = await this.$.readOnlyPrisma.taskRun.findFirst({
+            where: { id: runId },
+            select: {
+              usageDurationMs: true,
+              costInCents: true,
+              machinePreset: true,
+            },
+          });
+
+          if (!currentRun) {
+            throw new ServiceValidationError("Run not found", 404);
+          }
+
+          // Calculate new usage totals
+          const updatedUsage = this.#calculateUpdatedUsage({
+            runId,
+            currentUsageDurationMs: currentRun.usageDurationMs,
+            currentCostInCents: currentRun.costInCents,
+            attemptDurationMs: completion.usage?.durationMs ?? 0,
+            machinePresetName: currentRun.machinePreset,
+            environmentType: latestSnapshot.environmentType,
+          });
+
           const run = await prisma.taskRun.update({
             where: { id: runId },
             data: {
@@ -717,6 +741,8 @@ export class RunAttemptSystem {
               completedAt,
               output: completion.output,
               outputType: completion.outputType,
+              usageDurationMs: updatedUsage.usageDurationMs,
+              costInCents: updatedUsage.costInCents,
               executionSnapshots: {
                 create: {
                   executionStatus: "FINISHED",
@@ -873,7 +899,7 @@ export class RunAttemptSystem {
 
           const failedAt = new Date();
 
-          const retryResult = await retryOutcomeFromCompletion(prisma, {
+          const retryResult = await retryOutcomeFromCompletion(this.$.readOnlyPrisma, {
             runId,
             error: completion.error,
             retryUsingQueue: forceRequeue ?? false,
@@ -883,7 +909,7 @@ export class RunAttemptSystem {
 
           // Force requeue means it was crashed so the attempt span needs to be closed
           if (forceRequeue) {
-            const minimalRun = await prisma.taskRun.findFirst({
+            const minimalRun = await this.$.readOnlyPrisma.taskRun.findFirst({
               where: {
                 id: runId,
               },
@@ -930,6 +956,7 @@ export class RunAttemptSystem {
                 completedAt: failedAt,
                 reason: retryResult.reason,
                 finalizeRun: true,
+                attemptDurationMs: completion.usage?.durationMs,
                 tx: prisma,
               });
               return {
@@ -948,17 +975,31 @@ export class RunAttemptSystem {
                 error: retryResult.sanitizedError,
                 workerId,
                 runnerId,
+                attemptDurationMs: completion.usage?.durationMs,
               });
             }
             case "retry": {
               const retryAt = new Date(retryResult.settings.timestamp);
 
+              // Calculate new usage totals using the current machine's rate
+              // (retryResult includes current usage values from the read in retryOutcomeFromCompletion)
+              const updatedUsage = this.#calculateUpdatedUsage({
+                runId,
+                currentUsageDurationMs: retryResult.usageDurationMs,
+                currentCostInCents: retryResult.costInCents,
+                attemptDurationMs: completion.usage?.durationMs ?? 0,
+                machinePresetName: retryResult.machinePreset,
+                environmentType: latestSnapshot.environmentType,
+              });
+
               const run = await prisma.taskRun.update({
                 where: {
                   id: runId,
                 },
                 data: {
                   machinePreset: retryResult.machine,
+                  usageDurationMs: updatedUsage.usageDurationMs,
+                  costInCents: updatedUsage.costInCents,
                 },
                 include: {
                   runtimeEnvironment: {
@@ -1248,6 +1289,7 @@ export class RunAttemptSystem {
   If the run is in-progress it will change it's state to PENDING_CANCEL and notify the worker.
   If the run is not in-progress it will finish it.
   You can pass `finalizeRun` in if you know it's no longer running, e.g. the worker has messaged to say it's done.
+  You can optionally pass `attemptDurationMs` if you have completion data with usage info.
   */
   async cancelRun({
     runId,
@@ -1257,6 +1299,7 @@ export class RunAttemptSystem {
     reason,
     finalizeRun,
     bulkActionId,
+    attemptDurationMs,
     tx,
   }: {
     runId: string;
@@ -1266,6 +1309,7 @@ export class RunAttemptSystem {
     reason?: string;
     finalizeRun?: boolean;
     bulkActionId?: string;
+    attemptDurationMs?: number;
     tx?: PrismaClientOrTransaction;
   }): Promise<ExecutionResult & { alreadyFinished: boolean }> {
     const prisma = tx ?? this.$.prisma;
@@ -1312,6 +1356,32 @@ export class RunAttemptSystem {
           raw: reason,
         };
 
+        // Calculate updated usage if we have attempt duration data
+        let usageUpdate: { usageDurationMs: number; costInCents: number } | undefined;
+        if (attemptDurationMs !== undefined) {
+          const currentRun = await this.$.readOnlyPrisma.taskRun.findFirst({
+            where: { id: runId },
+            select: {
+              usageDurationMs: true,
+              costInCents: true,
+              machinePreset: true,
+            },
+          });
+
+          if (!currentRun) {
+            throw new ServiceValidationError("Run not found", 404);
+          }
+
+          usageUpdate = this.#calculateUpdatedUsage({
+            runId,
+            currentUsageDurationMs: currentRun.usageDurationMs,
+            currentCostInCents: currentRun.costInCents,
+            attemptDurationMs,
+            machinePresetName: currentRun.machinePreset,
+            environmentType: latestSnapshot.environmentType,
+          });
+        }
+
         const run = await prisma.taskRun.update({
           where: { id: runId },
           data: {
@@ -1320,9 +1390,13 @@ export class RunAttemptSystem {
             error,
             bulkActionGroupIds: bulkActionId
               ? {
-                  push: bulkActionId,
-                }
+                push: bulkActionId,
+              }
               : undefined,
+            ...(usageUpdate && {
+              usageDurationMs: usageUpdate.usageDurationMs,
+              costInCents: usageUpdate.costInCents,
+            }),
           },
           select: {
             id: true,
@@ -1478,6 +1552,7 @@ export class RunAttemptSystem {
     error,
     workerId,
     runnerId,
+    attemptDurationMs,
   }: {
     runId: string;
     latestSnapshot: EnhancedExecutionSnapshot;
@@ -1485,6 +1560,7 @@ export class RunAttemptSystem {
     error: TaskRunError;
     workerId?: string;
     runnerId?: string;
+    attemptDurationMs?: number;
   }): Promise<CompleteRunAttemptResult> {
     const prisma = this.$.prisma;
 
@@ -1493,6 +1569,30 @@ export class RunAttemptSystem {
 
       const truncatedError = this.#truncateTaskRunError(error);
 
+      // Read current usage values to calculate new totals
+      const currentRun = await this.$.readOnlyPrisma.taskRun.findFirst({
+        where: { id: runId },
+        select: {
+          usageDurationMs: true,
+          costInCents: true,
+          machinePreset: true,
+        },
+      });
+
+      if (!currentRun) {
+        throw new ServiceValidationError("Run not found", 404);
+      }
+
+      // Calculate new usage totals
+      const updatedUsage = this.#calculateUpdatedUsage({
+        runId,
+        currentUsageDurationMs: currentRun.usageDurationMs,
+        currentCostInCents: currentRun.costInCents,
+        attemptDurationMs: attemptDurationMs ?? 0,
+        machinePresetName: currentRun.machinePreset,
+        environmentType: latestSnapshot.environmentType,
+      });
+
       //run permanently failed
       const run = await prisma.taskRun.update({
         where: {
@@ -1502,6 +1602,8 @@ export class RunAttemptSystem {
           status,
           completedAt: failedAt,
           error: truncatedError,
+          usageDurationMs: updatedUsage.usageDurationMs,
+          costInCents: updatedUsage.costInCents,
         },
         select: {
           id: true,
@@ -1618,7 +1720,7 @@ export class RunAttemptSystem {
     backgroundWorkerTaskId: string
   ): Promise<BackwardsCompatibleTaskRunExecution["task"]> {
     const result = await this.cache.tasks.swr(backgroundWorkerTaskId, async () => {
-      const task = await this.$.prisma.backgroundWorkerTask.findFirstOrThrow({
+      const task = await this.$.readOnlyPrisma.backgroundWorkerTask.findFirstOrThrow({
         where: {
           id: backgroundWorkerTaskId,
         },
@@ -1654,7 +1756,7 @@ export class RunAttemptSystem {
     organizationId: string
   ): Promise<TaskRunExecutionOrganization> {
     const result = await this.cache.orgs.swr(organizationId, async () => {
-      const organization = await this.$.prisma.organization.findFirstOrThrow({
+      const organization = await this.$.readOnlyPrisma.organization.findFirstOrThrow({
         where: { id: organizationId },
         select: {
           id: true,
@@ -1687,7 +1789,7 @@ export class RunAttemptSystem {
     runtimeEnvironmentId: string
   ): Promise<TaskRunExecutionProject> {
     const result = await this.cache.projects.swr(runtimeEnvironmentId, async () => {
-      const { project } = await this.$.prisma.runtimeEnvironment.findFirstOrThrow({
+      const { project } = await this.$.readOnlyPrisma.runtimeEnvironment.findFirstOrThrow({
         where: { id: runtimeEnvironmentId },
         select: {
           id: true,
@@ -1735,7 +1837,7 @@ export class RunAttemptSystem {
     }
 
     const result = await this.cache.machinePresets.swr(backgroundWorkerTaskId, async () => {
-      const { machineConfig } = await this.$.prisma.backgroundWorkerTask.findFirstOrThrow({
+      const { machineConfig } = await this.$.readOnlyPrisma.backgroundWorkerTask.findFirstOrThrow({
         where: {
           id: backgroundWorkerTaskId,
         },
@@ -1773,27 +1875,27 @@ export class RunAttemptSystem {
   }): Promise<TaskRunExecutionQueue> {
     const result = await this.cache.queues.swr(params.runId, async () => {
       const queue = params.lockedQueueId
-        ? await this.$.prisma.taskQueue.findFirst({
-            where: {
-              id: params.lockedQueueId,
-            },
-            select: {
-              id: true,
-              friendlyId: true,
-              name: true,
-            },
-          })
-        : await this.$.prisma.taskQueue.findFirst({
-            where: {
-              runtimeEnvironmentId: params.runtimeEnvironmentId,
-              name: params.queueName,
-            },
-            select: {
-              id: true,
-              friendlyId: true,
-              name: true,
-            },
-          });
+        ? await this.$.readOnlyPrisma.taskQueue.findFirst({
+          where: {
+            id: params.lockedQueueId,
+          },
+          select: {
+            id: true,
+            friendlyId: true,
+            name: true,
+          },
+        })
+        : await this.$.readOnlyPrisma.taskQueue.findFirst({
+          where: {
+            runtimeEnvironmentId: params.runtimeEnvironmentId,
+            name: params.queueName,
+          },
+          select: {
+            id: true,
+            friendlyId: true,
+            name: true,
+          },
+        });
 
       if (!queue) {
         throw new ServiceValidationError(
@@ -1826,7 +1928,7 @@ export class RunAttemptSystem {
     backgroundWorkerTaskId: string
   ): Promise<TaskRunExecutionDeployment | undefined> {
     const result = await this.cache.deployments.swr(backgroundWorkerTaskId, async () => {
-      const { worker } = await this.$.prisma.backgroundWorkerTask.findFirstOrThrow({
+      const { worker } = await this.$.readOnlyPrisma.backgroundWorkerTask.findFirstOrThrow({
         where: { id: backgroundWorkerTaskId },
         select: {
           worker: {
@@ -1923,6 +2025,65 @@ export class RunAttemptSystem {
     };
   }
 
+  // PostgreSQL int4 max value (~24.85 days in milliseconds)
+  static readonly MAX_INT4 = 2_147_483_647;
+
+  /**
+   * Calculates the updated usage values for a run by adding the attempt's usage to the current totals.
+   * This should be called under the runLock to ensure safe read-modify-write.
+   * Cost is only calculated for non-dev environments.
+   */
+  #calculateUpdatedUsage({
+    runId,
+    currentUsageDurationMs,
+    currentCostInCents,
+    attemptDurationMs,
+    machinePresetName,
+    environmentType,
+  }: {
+    runId: string;
+    currentUsageDurationMs: number;
+    currentCostInCents: number;
+    attemptDurationMs: number;
+    machinePresetName: string | null;
+    environmentType: RuntimeEnvironmentType;
+  }): { usageDurationMs: number; costInCents: number } {
+    let usageDurationMs = currentUsageDurationMs + attemptDurationMs;
+
+    // Overflow protection: cap at PostgreSQL int4 max value
+    if (usageDurationMs > RunAttemptSystem.MAX_INT4) {
+      this.$.logger.error("usageDurationMs overflow detected, capping at max int4 value", {
+        runId,
+        currentUsageDurationMs,
+        attemptDurationMs,
+        calculatedTotal: usageDurationMs,
+        cappedAt: RunAttemptSystem.MAX_INT4,
+      });
+      usageDurationMs = RunAttemptSystem.MAX_INT4;
+    }
+
+    // Only calculate cost for non-dev environments
+    let costInCents = currentCostInCents;
+    if (environmentType !== "DEVELOPMENT") {
+      const machinePreset = machinePresetName
+        ? machinePresetFromName(
+          this.options.machines.machines,
+          machinePresetName as MachinePresetName
+        )
+        : machinePresetFromName(
+          this.options.machines.machines,
+          this.options.machines.defaultMachine
+        );
+
+      costInCents = currentCostInCents + attemptDurationMs * machinePreset.centsPerMs;
+    }
+
+    return {
+      usageDurationMs,
+      costInCents,
+    };
+  }
+
 }
 
 export function safeParseGitMeta(git: unknown): GitMeta | undefined {
diff --git a/references/hello-world/src/trigger/usage.ts b/references/hello-world/src/trigger/usage.ts
index caacbde2ac..cd5e8dca83 100644
--- a/references/hello-world/src/trigger/usage.ts
+++ b/references/hello-world/src/trigger/usage.ts
@@ -1,5 +1,6 @@
-import { logger, task, wait, usage } from "@trigger.dev/sdk";
+import { logger, task, wait, usage, runs } from "@trigger.dev/sdk";
 import { setTimeout } from "timers/promises";
+import assert from "node:assert";
 
 export const usageExampleTask = task({
   id: "usage-example",
@@ -33,3 +34,197 @@ export const usageExampleTask = task({
     };
   },
 });
+
+/**
+ * Test task to verify usage tracking works correctly after moving updates to run engine.
+ *
+ * Tests:
+ * 1. usageDurationMs accumulates across attempts (retries)
+ * 2. costInCents is only calculated for non-dev environments
+ * 3. Usage is tracked and returned correctly
+ *
+ * Run with:
+ *   - { causeRetry: false } for simple usage test
+ *   - { causeRetry: true } for retry accumulation test
+ */
+export const usageTrackingTestTask = task({
+  id: "usage-tracking-test",
+  retry: {
+    maxAttempts: 3,
+    minTimeoutInMs: 100,
+    maxTimeoutInMs: 200,
+    factor: 1,
+  },
+  run: async (payload: { causeRetry?: boolean; workDurationMs?: number }, { ctx }) => {
+    const workDuration = payload.workDurationMs ?? 2000;
+    const isDev = ctx.environment.type === "DEVELOPMENT";
+
+    logger.info("Starting usage tracking test", {
+      attemptNumber: ctx.attempt.number,
+      environmentType: ctx.environment.type,
+      isDev,
+      workDuration,
+      causeRetry: payload.causeRetry,
+    });
+
+    // Get usage at start of this attempt
+    const usageAtStart = usage.getCurrent();
+    logger.info("Usage at attempt start", {
+      attemptNumber: ctx.attempt.number,
+      usageAtStart,
+    });
+
+    // Do some "work" to accumulate usage duration
+    const workStart = Date.now();
+    await setTimeout(workDuration);
+    const actualWorkTime = Date.now() - workStart;
+
+    // Get usage after work
+    const usageAfterWork = usage.getCurrent();
+    logger.info("Usage after work", {
+      attemptNumber: ctx.attempt.number,
+      usageAfterWork,
+      actualWorkTimeMs: actualWorkTime,
+      attemptDurationDelta:
+        usageAfterWork.compute.attempt.durationMs - usageAtStart.compute.attempt.durationMs,
+    });
+
+    // Cause a retry on first attempt if requested
+    if (payload.causeRetry && ctx.attempt.number === 1) {
+      logger.info("Throwing error to cause retry - usage from this attempt should accumulate");
+      throw new Error("Intentional error to test usage accumulation across retries");
+    }
+
+    // Log expectations for verification
+    logger.info("Usage tracking test completed", {
+      attemptNumber: ctx.attempt.number,
+      finalUsage: usageAfterWork,
+      environmentType: ctx.environment.type,
+      expectations: {
+        usageDurationMs: "Should be > 0 and reflect actual CPU time",
+        costInCents: isDev
+          ? "Should be 0 (dev environment - no cost tracking)"
+          : "Should be > 0 (calculated from usageDurationMs * machine centsPerMs)",
+        retryAccumulation: payload.causeRetry
+          ? "If this is attempt 2+, usageDurationMs should include time from previous attempts"
+          : "N/A - no retry",
+      },
+    });
+
+    return {
+      success: true,
+      attemptNumber: ctx.attempt.number,
+      environmentType: ctx.environment.type,
+      finalUsage: usageAfterWork,
+      isDev,
+      note: isDev
+        ? "costInCents will be 0 in dev - deploy to staging/prod to test cost calculation"
+        : "costInCents should reflect accumulated usage cost",
+    };
+  },
+});
+
+/**
+ * Parent task that triggers usageTrackingTestTask and verifies the usage values
+ * are correctly stored in the database via runs.retrieve().
+ *
+ * This tests the full flow:
+ * 1. Trigger child task and wait for completion
+ * 2. Use runs.retrieve() to fetch the run from the database
+ * 3. Verify usageDurationMs > 0
+ * 4. Verify costInCents behavior based on environment type
+ */
+export const usageVerificationParentTask = task({
+  id: "usage-verification-parent",
+  run: async (payload: { causeRetry?: boolean; workDurationMs?: number }, { ctx }) => {
+    const isDev = ctx.environment.type === "DEVELOPMENT";
+
+    logger.info("Starting usage verification parent task", {
+      environmentType: ctx.environment.type,
+      isDev,
+      causeRetry: payload.causeRetry,
+      workDurationMs: payload.workDurationMs,
+    });
+
+    // Trigger the child task and wait for it to complete
+    const childResult = await usageTrackingTestTask.triggerAndWait({
+      causeRetry: payload.causeRetry,
+      workDurationMs: payload.workDurationMs ?? 2000,
+    });
+
+    if (!childResult.ok) {
+      throw new Error(`Child task failed: ${JSON.stringify(childResult.error)}`);
+    }
+
+    logger.info("Child task completed", {
+      childRunId: childResult.id,
+      childOutput: childResult.output,
+    });
+
+    // Retrieve the run from the database to verify usage values were stored
+    const retrievedRun = await runs.retrieve(childResult.id);
+
+    logger.info("Retrieved run from database", {
+      runId: retrievedRun.id,
+      status: retrievedRun.status,
+      durationMs: retrievedRun.durationMs,
+      costInCents: retrievedRun.costInCents,
+      baseCostInCents: retrievedRun.baseCostInCents,
+    });
+
+    // Verify usageDurationMs (durationMs in the API response) is greater than 0
+    assert.ok(
+      retrievedRun.durationMs > 0,
+      `Expected durationMs > 0, got ${retrievedRun.durationMs}`
+    );
+
+    // For retry test, verify duration accumulated across attempts
+    if (payload.causeRetry) {
+      // With a retry, we should have at least 2x the work duration (attempt 1 + attempt 2)
+      const minExpectedDuration = (payload.workDurationMs ?? 2000) * 1.5; // Allow some variance
+      assert.ok(
+        retrievedRun.durationMs >= minExpectedDuration,
+        `Expected durationMs >= ${minExpectedDuration} for retry test (got ${retrievedRun.durationMs})`
+      );
+      logger.info("✅ Retry accumulation verified - duration includes time from both attempts");
+    }
+
+    // Verify costInCents based on environment type
+    if (isDev) {
+      // In dev, cost should be 0
+      assert.strictEqual(
+        retrievedRun.costInCents,
+        0,
+        `Expected costInCents to be 0 in dev environment, got ${retrievedRun.costInCents}`
+      );
+      logger.info("✅ Dev environment verified - costInCents is 0 as expected");
+    } else {
+      // In non-dev, cost should be > 0
+      assert.ok(
+        retrievedRun.costInCents > 0,
+        `Expected costInCents > 0 in ${ctx.environment.type} environment, got ${retrievedRun.costInCents}`
+      );
+      logger.info(
+        `✅ ${ctx.environment.type} environment verified - costInCents is ${retrievedRun.costInCents}`
+      );
+    }
+
+    logger.info("✅ All usage verification checks passed!", {
+      durationMs: retrievedRun.durationMs,
+      costInCents: retrievedRun.costInCents,
+      baseCostInCents: retrievedRun.baseCostInCents,
+      environmentType: ctx.environment.type,
+      hadRetry: payload.causeRetry,
+    });
+
+    return {
+      success: true,
+      childRunId: childResult.id,
+      durationMs: retrievedRun.durationMs,
+      costInCents: retrievedRun.costInCents,
+      baseCostInCents: retrievedRun.baseCostInCents,
+      environmentType: ctx.environment.type,
+      hadRetry: payload.causeRetry ?? false,
+    };
+  },
+});