SyncVals · Trajectory

s3-sqs-image-pipeline-kms

claude-code claude-opus-4-7 ✗ failed BAD_FAILURE ↑ View task

Solved from the instruction alone, tests/ and solution/ were withheld from the agent's workspace and restored only for grading.

Reward = tests/test.sh exit code (0 → resolved); the classification below is post-hoc and cannot change it.

Classification , post-hoc; cannot change the reward

BAD_FAILUREThe task is at fault, underspecified/contradictory instruction, brittle/flaky tests, or tests demanding undiscoverable behavior.

SubtypeUnderspecified Instruction

EvidenceTest failures show: (1) test_source_and_dest_buckets_use_customer_cmks expects key ID UUID 'cfee14f6-ca89-4caa-8b60-c1526626a300' in KMSMasterKeyID but got 'arn:aws:kms:us-east-1:000000000000:alias/source-bucket-cmk'; (2) test_main_queue_and_dlq_exist_and_are_encrypted expects key ID UUID but got 'alias/sqs-queue-cmk'. The instruction explicitly says to use the alias names provided ('alias/source-bucket-cmk', 'alias/sqs-queue-cmk', 'alias/dest-bucket-cmk'), and the agent correctly did so. However, tests validate against the underlying key IDs, which are not mentioned in the instruction and not discoverable without examining the test code.

Root causeThe instruction specifies using KMS alias names (e.g., 'alias/source-bucket-cmk'), but the tests actually validate against the underlying KMS key IDs (UUIDs). When using an alias in AWS KMS API calls, the response returns the alias ARN, not the key ID, making it impossible for the agent to pass the tests without being told to explicitly resolve aliases to key IDs, information not present in the instruction.

RecommendationClarify the instruction to specify that buckets and queues should be configured with KMS key IDs (not alias ARNs) for encryption, or update the tests to accept either format (alias ARN or key ID). Currently, the instruction and tests are in conflict: instruction names aliases as the required identifiers, but tests validate against the key IDs those aliases point to.

Trajectory

Tool-by-tool agent trajectory

35 tool calls · 4 tool types · 43 steps

ok, nothing's built yet and the box is empty. localstack is at `http://localstack:4566`, creds are exported (`AWS_ACCESS_KEY_ID=test`, same for secret, region `us-east-1`), you've got `aws`, `python3`, `boto3`, `jq`, `zip`, `curl`. stand the whole thing up from scratch. we're building an image-ingest pipeline. someone drops an object into a source bucket and on the other end we want a processed copy in a dest bucket plus a row in dynamodb describing it. everything has to be SSE-KMS with customer-managed keys , the bucket on the way in, the queue in the middle, and the bucket on the way out. three separate CMKs, one per boundary. least privilege throughout. the verifier reads policy docs directly, so don't wildcard your way through kms. shape of it: - PUT to the source bucket fires an s3 ObjectCreated notification - notification lands on an SQS standard queue (SSE-KMS) - a lambda consumes the queue and for each record: reads the source object, writes a processed copy to the dest bucket at `processed/<same-key>`, and writes a row to ddb with `{object_key, source_size, processed_at, status: "OK"}` - there's a DLQ behind the main queue with a redrive policy - the handler does per-record error handling , bad records get reported back individually, good records in the same batch don't get retried done looks like: one PUT to the source bucket, and within 60s, exactly one object at `processed/<key>` in the dest bucket, exactly one ddb row keyed by `object_key`, and nothing in the DLQ. keys with spaces in them have to work too (the s3 event url-encodes them , you know where this is going). also, when the handler is invoked with a batch that contains a broken record alongside a good one, only the broken record's id comes back in the response and the good one isn't retried. couple of things to be careful about: the SQS visibility timeout needs to actually cover the lambda timeout or messages get redriven into the DLQ mid-processing. and the partial-batch-failure contract has two sides , both the event source mapping and the handler response shape need to match, or the whole batch retries on any single failure. the aws docs on `ReportBatchItemFailures` are worth a glance. names the verifier grabs by hand, use them exactly: | thing | name | |-|-| | source bucket | `ingest-source-bucket` | | dest bucket | `ingest-dest-bucket` | | main queue | `ingest-events` | | dlq | `ingest-dlq` | | source bucket CMK alias | `alias/source-bucket-cmk` | | sqs CMK alias | `alias/sqs-queue-cmk` | | dest bucket CMK alias | `alias/dest-bucket-cmk` | | lambda | `image-ingest-consumer` | | lambda role | `image-ingest-lambda-role` | | ddb table | `image-ingest-records` | ddb partition key is `object_key` (string), no sort key. lambda is python3.11, handler entrypoint `handler.lambda_handler`. localstack community 4.13.1. you've got 60 minutes.

Check localstack connectivity and health

shell

aws --endpoint-url=http://localstack:4566 sts get-caller-identity && echo "---" && curl -s http://localstack:4566/_localstack/health | jq .

output

{
    "UserId": "AKIAIOSFODNN7EXAMPLE",
    "Account": "000000000000",
    "Arn": "arn:aws:iam::000000000000:root"
}
---
{
  "services": {
    "acm": "disabled",
    "apigateway": "disabled",
    "cloudformation": "disabled",
    "cloudwatch": "disabled",
    "config": "disabled",
    "dynamodb": "available",
    "dynamodbstreams": "available",
    "ec2": "disabled",
    "es": "disabled",
    "events": "available",
    "firehose": "disabled",
    "iam": "available",
    "kinesis": "available",
    "kms": "available",
    "lambda": "available",
    "logs": "available",
    "opensearch": "disabled",
    "redshift": "disabled",
    "resource-groups": "disabled",
    "resourcegroupstaggingapi": "disabled",
    "route53": "disabled",
    "route53resolver": "disabled",
    "s3": "available",
    "s3control": "disabled",
    "scheduler": "disabled",
    "secretsmanager": "disabled",
    "ses": "disabled",
    "sns": "disabled",
    "sqs": "available",
    "ssm": "disabled",
    "stepfunctions": "disabled",
    "sts": "running",
    "support": "disabled",
    "swf": "disabled",
    "transcribe": "disabled"
  },
  "edition": "community",
  "version": "4.13.1"
}

[stdout]
{
    "UserId": "AKIAIOSFODNN7EXAMPLE",
    "Account": "000000000000",
    "Arn": "arn:aws:iam::000000000000:root"
}
---
{
  "services": {
    "acm": "disabled",
    "apigateway": "disabled",
    "cloudformation": "disabled",
    "cloudwatch": "disabled",
    "config": "disabled",
    "dynamodb": "available",
    "dynamodbstreams": "available",
    "ec2": "disabled",
    "es": "disabled",
    "events": "available",
    "firehose": "disabled",
    "iam": "available",
    "kinesis": "available",
    "kms": "available",
    "lambda": "available",
    "logs": "available",
    "opensearch": "disabled",
    "redshift": "disabled",
    "resource-groups": "disabled",
    "resourcegroupstaggingapi": "disabled",
    "route53": "disabled",
    "route53resolver": "disabled",
    "s3": "available",
    "s3control": "disabled",
    "scheduler": "disabled",
    "secretsmanager": "disabled",
    "ses": "disabled",
    "sns": "disabled",
    "sqs": "available",
    "ssm": "disabled",
    "stepfunctions": "disabled",
    "sts": "running",
    "support": "disabled",
    "swf": "disabled",
    "transcribe": "disabled"
  },
  "edition": "community",
  "version": "4.13.1"
}

Create build directory and list app dir

shell

mkdir -p /app/build && ls -la

output

total 12
drwxr-xr-x 1 root root 4096 Apr 23 06:01 .
drwxr-xr-x 1 root root 4096 Apr 23 05:59 ..
drwxr-xr-x 2 root root 4096 Apr 23 06:01 build

[stdout]
total 12
drwxr-xr-x 1 root root 4096 Apr 23 06:01 .
drwxr-xr-x 1 root root 4096 Apr 23 05:59 ..
drwxr-xr-x 2 root root 4096 Apr 23 06:01 build

I'll build this in stages. Let me start by creating the KMS keys with proper policies, then work outward.

Set up environment variables

shell

export AWS_ENDPOINT_URL=http://localstack:4566
export AWS_DEFAULT_REGION=us-east-1
echo "export AWS_ENDPOINT_URL=http://localstack:4566" > /app/build/env.sh
echo "export AWS_DEFAULT_REGION=us-east-1" >> /app/build/env.sh
echo "export AWS_PAGER=''" >> /app/build/env.sh
cat /app/build/env.sh

output

export AWS_ENDPOINT_URL=http://localstack:4566
export AWS_DEFAULT_REGION=us-east-1
export AWS_PAGER=''

[stdout]
export AWS_ENDPOINT_URL=http://localstack:4566
export AWS_DEFAULT_REGION=us-east-1
export AWS_PAGER=''

write · /app/build/kms-source.json

{
  "Version": "2012-10-17",
  "Id": "source-bucket-cmk-policy",
  "Statement": [
    {
      "Sid": "EnableRootPermissions",
      "Effect": "Allow",
      "Principal": {"AWS": "arn:aws:iam::000000000000:root"},
      "Action": [
        "kms:Create*",
        "kms:Describe*",
        "kms:Enable*",
        "kms:List*",
        "kms:Put*",
        "kms:Update*",
        "kms:Revoke*",
        "kms:Disable*",
        "kms:Get*",
        "kms:Delete*",
        "kms:TagResource",
        "kms:UntagResource",
        "kms:ScheduleKeyDeletion",
        "kms:CancelKeyDeletion"
      ],
      "Resource": "*"
    },
    {
      "Sid": "AllowLambdaDecryptSourceObjects",
      "Effect": "Allow",
      "Principal": {"AWS": "arn:aws:iam::000000000000:role/image-ingest-lambda-role"},
      "Action": ["kms:Decrypt", "kms:DescribeKey"],
      "Resource": "*"
    }
  ]
}

write · /app/build/kms-sqs.json

{
  "Version": "2012-10-17",
  "Id": "sqs-queue-cmk-policy",
  "Statement": [
    {
      "Sid": "EnableRootPermissions",
      "Effect": "Allow",
      "Principal": {"AWS": "arn:aws:iam::000000000000:root"},
      "Action": [
        "kms:Create*",
        "kms:Describe*",
        "kms:Enable*",
        "kms:List*",
        "kms:Put*",
        "kms:Update*",
        "kms:Revoke*",
        "kms:Disable*",
        "kms:Get*",
        "kms:Delete*",
        "kms:TagResource",
        "kms:UntagResource",
        "kms:ScheduleKeyDeletion",
        "kms:CancelKeyDeletion"
      ],
      "Resource": "*"
    },
    {
      "Sid": "AllowS3ToEncryptMessagesForQueue",
      "Effect": "Allow",
      "Principal": {"Service": "s3.amazonaws.com"},
      "Action": ["kms:GenerateDataKey", "kms:Decrypt"],
      "Resource": "*"
    },
    {
      "Sid": "AllowLambdaDecryptQueueMessages",
      "Effect": "Allow",
      "Principal": {"AWS": "arn:aws:iam::000000000000:role/image-ingest-lambda-role"},
      "Action": ["kms:Decrypt", "kms:DescribeKey"],
      "Resource": "*"
    }
  ]
}

write · /app/build/kms-dest.json

{
  "Version": "2012-10-17",
  "Id": "dest-bucket-cmk-policy",
  "Statement": [
    {
      "Sid": "EnableRootPermissions",
      "Effect": "Allow",
      "Principal": {"AWS": "arn:aws:iam::000000000000:root"},
      "Action": [
        "kms:Create*",
        "kms:Describe*",
        "kms:Enable*",
        "kms:List*",
        "kms:Put*",
        "kms:Update*",
        "kms:Revoke*",
        "kms:Disable*",
        "kms:Get*",
        "kms:Delete*",
        "kms:TagResource",
        "kms:UntagResource",
        "kms:ScheduleKeyDeletion",
        "kms:CancelKeyDeletion"
      ],
      "Resource": "*"
    },
    {
      "Sid": "AllowLambdaEncryptDestObjects",
      "Effect": "Allow",
      "Principal": {"AWS": "arn:aws:iam::000000000000:role/image-ingest-lambda-role"},
      "Action": [
        "kms:Encrypt",
        "kms:GenerateDataKey",
        "kms:DescribeKey"
      ],
      "Resource": "*"
    }
  ]
}

Create 3 KMS keys and aliases

shell

source /app/build/env.sh
SRC_KEY=$(aws kms create-key --description "source bucket CMK" --policy file:///app/build/kms-source.json --query 'KeyMetadata.KeyId' --output text)
SQS_KEY=$(aws kms create-key --description "sqs queue CMK" --policy file:///app/build/kms-sqs.json --query 'KeyMetadata.KeyId' --output text)
DEST_KEY=$(aws kms create-key --description "dest bucket CMK" --policy file:///app/build/kms-dest.json --query 'KeyMetadata.KeyId' --output text)
echo "SRC_KEY=$SRC_KEY"
echo "SQS_KEY=$SQS_KEY"
echo "DEST_KEY=$DEST_KEY"
aws kms create-alias --alias-name alias/source-bucket-cmk --target-key-id $SRC_KEY
aws kms create-alias --alias-name alias/sqs-queue-cmk --target-key-id $SQS_KEY
aws kms create-alias --alias-name alias/dest-bucket-cmk --target-key-id $DEST_KEY
echo "SRC_KEY=$SRC_KEY" > /app/build/ids.sh
echo "SQS_KEY=$SQS_KEY" >> /app/build/ids.sh
echo "DEST_KEY=$DEST_KEY" >> /app/build/ids.sh
aws kms list-aliases | jq '.Aliases[] | select(.AliasName | test("source-bucket|sqs-queue|dest-bucket")) | .AliasName'

output

SRC_KEY=cfee14f6-ca89-4caa-8b60-c1526626a300
SQS_KEY=87f146b4-bc5f-420c-bdfc-d88f28da2254
DEST_KEY=b8b560df-2fa3-4d69-8009-6b56f9b54231
"alias/source-bucket-cmk"
"alias/sqs-queue-cmk"
"alias/dest-bucket-cmk"

[stdout]
SRC_KEY=cfee14f6-ca89-4caa-8b60-c1526626a300
SQS_KEY=87f146b4-bc5f-420c-bdfc-d88f28da2254
DEST_KEY=b8b560df-2fa3-4d69-8009-6b56f9b54231
"alias/source-bucket-cmk"
"alias/sqs-queue-cmk"
"alias/dest-bucket-cmk"

write · /app/build/trust.json

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {"Service": "lambda.amazonaws.com"},
      "Action": "sts:AssumeRole"
    }
  ]
}

Create Lambda IAM role

shell

source /app/build/env.sh
aws iam create-role --role-name image-ingest-lambda-role --assume-role-policy-document file:///app/build/trust.json --query 'Role.Arn' --output text

output

arn:aws:iam::000000000000:role/image-ingest-lambda-role

[stdout]
arn:aws:iam::000000000000:role/image-ingest-lambda-role

ToolSearch

{
  "query": "select:TodoWrite",
  "max_results": 1
}

, output, 
{"type": "tool_reference", "tool_name": "TodoWrite"}

Create KMS keys + aliases
Create lambda IAM role
Create S3 buckets with SSE-KMS defaults
Create DynamoDB table
Create SQS DLQ and main queue (SSE-KMS, redrive)
Wire S3 notification to SQS
Attach scoped policies to lambda role
Build + deploy lambda with handler
Create event source mapping with ReportBatchItemFailures
End-to-end smoke test (including spaces in key + partial failure)

Create source and dest buckets with SSE-KMS defaults

shell

source /app/build/env.sh
source /app/build/ids.sh
aws s3api create-bucket --bucket ingest-source-bucket
aws s3api create-bucket --bucket ingest-dest-bucket
# default SSE-KMS
cat > /app/build/src-sse.json <<EOF
{"Rules":[{"ApplyServerSideEncryptionByDefault":{"SSEAlgorithm":"aws:kms","KMSMasterKeyID":"arn:aws:kms:us-east-1:000000000000:alias/source-bucket-cmk"},"BucketKeyEnabled":true}]}
EOF
cat > /app/build/dest-sse.json <<EOF
{"Rules":[{"ApplyServerSideEncryptionByDefault":{"SSEAlgorithm":"aws:kms","KMSMasterKeyID":"arn:aws:kms:us-east-1:000000000000:alias/dest-bucket-cmk"},"BucketKeyEnabled":true}]}
EOF
aws s3api put-bucket-encryption --bucket ingest-source-bucket --server-side-encryption-configuration file:///app/build/src-sse.json
aws s3api put-bucket-encryption --bucket ingest-dest-bucket --server-side-encryption-configuration file:///app/build/dest-sse.json
aws s3api get-bucket-encryption --bucket ingest-source-bucket
aws s3api get-bucket-encryption --bucket ingest-dest-bucket

output

{
    "Location": "/ingest-source-bucket"
}
{
    "Location": "/ingest-dest-bucket"
}
{
    "ServerSideEncryptionConfiguration": {
        "Rules": [
            {
                "ApplyServerSideEncryptionByDefault": {
                    "SSEAlgorithm": "aws:kms",
                    "KMSMasterKeyID": "arn:aws:kms:us-east-1:000000000000:alias/source-bucket-cmk"
                },
                "BucketKeyEnabled": true
            }
        ]
    }
}
{
    "ServerSideEncryptionConfiguration": {
        "Rules": [
            {
                "ApplyServerSideEncryptionByDefault": {
                    "SSEAlgorithm": "aws:kms",
                    "KMSMasterKeyID": "arn:aws:kms:us-east-1:000000000000:alias/dest-bucket-cmk"
                },
                "BucketKeyEnabled": true
            }
        ]
    }
}

[stdout]
{
    "Location": "/ingest-source-bucket"
}
{
    "Location": "/ingest-dest-bucket"
}
{
    "ServerSideEncryptionConfiguration": {
        "Rules": [
            {
                "ApplyServerSideEncryptionByDefault": {
                    "SSEAlgorithm": "aws:kms",
                    "KMSMasterKeyID": "arn:aws:kms:us-east-1:000000000000:alias/source-bucket-cmk"
                },
                "BucketKeyEnabled": true
            }
        ]
    }
}
{
    "ServerSideEncryptionConfiguration": {
        "Rules": [
            {
                "ApplyServerSideEncryptionByDefault": {
                    "SSEAlgorithm": "aws:kms",
                    "KMSMasterKeyID": "arn:aws:kms:us-east-1:000000000000:alias/dest-bucket-cmk"
                },
                "BucketKeyEnabled": true
            }
        ]
    }
}

Create KMS keys + aliases
Create lambda IAM role
Create S3 buckets with SSE-KMS defaults
Create DynamoDB table
Create SQS DLQ and main queue (SSE-KMS, redrive)
Wire S3 notification to SQS
Attach scoped policies to lambda role
Build + deploy lambda with handler
Create event source mapping with ReportBatchItemFailures
End-to-end smoke test (including spaces in key + partial failure)

Create DynamoDB table

shell

source /app/build/env.sh
aws dynamodb create-table \
  --table-name image-ingest-records \
  --attribute-definitions AttributeName=object_key,AttributeType=S \
  --key-schema AttributeName=object_key,KeyType=HASH \
  --billing-mode PAY_PER_REQUEST \
  --query 'TableDescription.TableArn' --output text
aws dynamodb describe-table --table-name image-ingest-records --query 'Table.TableStatus' --output text

output

arn:aws:dynamodb:us-east-1:000000000000:table/image-ingest-records
ACTIVE

[stdout]
arn:aws:dynamodb:us-east-1:000000000000:table/image-ingest-records
ACTIVE

Create DLQ and main SQS queue with SSE-KMS and redrive policy

shell

source /app/build/env.sh
source /app/build/ids.sh
# DLQ
DLQ_URL=$(aws sqs create-queue \
  --queue-name ingest-dlq \
  --attributes KmsMasterKeyId=alias/sqs-queue-cmk \
  --query 'QueueUrl' --output text)
echo "DLQ_URL=$DLQ_URL"
DLQ_ARN=$(aws sqs get-queue-attributes --queue-url $DLQ_URL --attribute-names QueueArn --query 'Attributes.QueueArn' --output text)
echo "DLQ_ARN=$DLQ_ARN"

# Main queue - visibility 60s (lambda timeout 30s), redrive to DLQ
MQ_URL=$(aws sqs create-queue \
  --queue-name ingest-events \
  --attributes "{\"KmsMasterKeyId\":\"alias/sqs-queue-cmk\",\"VisibilityTimeout\":\"60\",\"RedrivePolicy\":\"{\\\"deadLetterTargetArn\\\":\\\"$DLQ_ARN\\\",\\\"maxReceiveCount\\\":\\\"5\\\"}\"}" \
  --query 'QueueUrl' --output text)
echo "MQ_URL=$MQ_URL"
MQ_ARN=$(aws sqs get-queue-attributes --queue-url $MQ_URL --attribute-names QueueArn --query 'Attributes.QueueArn' --output text)
echo "MQ_ARN=$MQ_ARN"

echo "DLQ_URL=$DLQ_URL" >> /app/build/ids.sh
echo "DLQ_ARN=$DLQ_ARN" >> /app/build/ids.sh
echo "MQ_URL=$MQ_URL" >> /app/build/ids.sh
echo "MQ_ARN=$MQ_ARN" >> /app/build/ids.sh

aws sqs get-queue-attributes --queue-url $MQ_URL --attribute-names All | jq '.Attributes | {KmsMasterKeyId,VisibilityTimeout,RedrivePolicy}'

output

DLQ_URL=http://sqs.us-east-1.localhost.localstack.cloud:4566/000000000000/ingest-dlq
DLQ_ARN=arn:aws:sqs:us-east-1:000000000000:ingest-dlq
MQ_URL=http://sqs.us-east-1.localhost.localstack.cloud:4566/000000000000/ingest-events
MQ_ARN=arn:aws:sqs:us-east-1:000000000000:ingest-events
{
  "KmsMasterKeyId": "alias/sqs-queue-cmk",
  "VisibilityTimeout": "60",
  "RedrivePolicy": "{\"deadLetterTargetArn\":\"arn:aws:sqs:us-east-1:000000000000:ingest-dlq\",\"maxReceiveCount\":\"5\"}"
}

[stdout]
DLQ_URL=http://sqs.us-east-1.localhost.localstack.cloud:4566/000000000000/ingest-dlq
DLQ_ARN=arn:aws:sqs:us-east-1:000000000000:ingest-dlq
MQ_URL=http://sqs.us-east-1.localhost.localstack.cloud:4566/000000000000/ingest-events
MQ_ARN=arn:aws:sqs:us-east-1:000000000000:ingest-events
{
  "KmsMasterKeyId": "alias/sqs-queue-cmk",
  "VisibilityTimeout": "60",
  "RedrivePolicy": "{\"deadLetterTargetArn\":\"arn:aws:sqs:us-east-1:000000000000:ingest-dlq\",\"maxReceiveCount\":\"5\"}"
}

write · /app/build/sqs-policy.json

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowS3SourceBucketToSendMessages",
      "Effect": "Allow",
      "Principal": {"Service": "s3.amazonaws.com"},
      "Action": "sqs:SendMessage",
      "Resource": "arn:aws:sqs:us-east-1:000000000000:ingest-events",
      "Condition": {
        "ArnEquals": {"aws:SourceArn": "arn:aws:s3:::ingest-source-bucket"},
        "StringEquals": {"aws:SourceAccount": "000000000000"}
      }
    }
  ]
}

Set SQS queue policy allowing S3 source bucket

shell

source /app/build/env.sh
source /app/build/ids.sh
POLICY=$(cat /app/build/sqs-policy.json | jq -c . | jq -Rs .)
aws sqs set-queue-attributes --queue-url $MQ_URL --attributes "{\"Policy\":$POLICY}"
aws sqs get-queue-attributes --queue-url $MQ_URL --attribute-names Policy | jq -r '.Attributes.Policy' | jq .

output

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowS3SourceBucketToSendMessages",
      "Effect": "Allow",
      "Principal": {
        "Service": "s3.amazonaws.com"
      },
      "Action": "sqs:SendMessage",
      "Resource": "arn:aws:sqs:us-east-1:000000000000:ingest-events",
      "Condition": {
        "ArnEquals": {
          "aws:SourceArn": "arn:aws:s3:::ingest-source-bucket"
        },
        "StringEquals": {
          "aws:SourceAccount": "000000000000"
        }
      }
    }
  ]
}

[stdout]
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowS3SourceBucketToSendMessages",
      "Effect": "Allow",
      "Principal": {
        "Service": "s3.amazonaws.com"
      },
      "Action": "sqs:SendMessage",
      "Resource": "arn:aws:sqs:us-east-1:000000000000:ingest-events",
      "Condition": {
        "ArnEquals": {
          "aws:SourceArn": "arn:aws:s3:::ingest-source-bucket"
        },
        "StringEquals": {
          "aws:SourceAccount": "000000000000"
        }
      }
    }
  ]
}

Create KMS keys + aliases
Create lambda IAM role
Create S3 buckets with SSE-KMS defaults
Create DynamoDB table
Create SQS DLQ and main queue (SSE-KMS, redrive)
Wire S3 notification to SQS
Attach scoped policies to lambda role
Build + deploy lambda with handler
Create event source mapping with ReportBatchItemFailures
End-to-end smoke test (including spaces in key + partial failure)

write · /app/build/notif.json

{
  "QueueConfigurations": [
    {
      "Id": "on-object-created",
      "QueueArn": "arn:aws:sqs:us-east-1:000000000000:ingest-events",
      "Events": ["s3:ObjectCreated:*"]
    }
  ]
}

Wire S3 source bucket → SQS notification

shell

source /app/build/env.sh
aws s3api put-bucket-notification-configuration --bucket ingest-source-bucket --notification-configuration file:///app/build/notif.json
aws s3api get-bucket-notification-configuration --bucket ingest-source-bucket

output

{
    "QueueConfigurations": [
        {
            "Id": "on-object-created",
            "QueueArn": "arn:aws:sqs:us-east-1:000000000000:ingest-events",
            "Events": [
                "s3:ObjectCreated:*"
            ]
        }
    ]
}

[stdout]
{
    "QueueConfigurations": [
        {
            "Id": "on-object-created",
            "QueueArn": "arn:aws:sqs:us-east-1:000000000000:ingest-events",
            "Events": [
                "s3:ObjectCreated:*"
            ]
        }
    ]
}

Now the lambda role inline policies , scoped to each resource.

write · /app/build/lambda-policy.json

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "Logs",
      "Effect": "Allow",
      "Action": [
        "logs:CreateLogGroup",
        "logs:CreateLogStream",
        "logs:PutLogEvents"
      ],
      "Resource": "arn:aws:logs:us-east-1:000000000000:log-group:/aws/lambda/image-ingest-consumer:*"
    },
    {
      "Sid": "ReadFromSourceBucket",
      "Effect": "Allow",
      "Action": ["s3:GetObject"],
      "Resource": "arn:aws:s3:::ingest-source-bucket/*"
    },
    {
      "Sid": "WriteToDestBucket",
      "Effect": "Allow",
      "Action": ["s3:PutObject"],
      "Resource": "arn:aws:s3:::ingest-dest-bucket/processed/*"
    },
    {
      "Sid": "ConsumeQueue",
      "Effect": "Allow",
      "Action": [
        "sqs:ReceiveMessage",
        "sqs:DeleteMessage",
        "sqs:GetQueueAttributes",
        "sqs:ChangeMessageVisibility"
      ],
      "Resource": "arn:aws:sqs:us-east-1:000000000000:ingest-events"
    },
    {
      "Sid": "WriteToDdb",
      "Effect": "Allow",
      "Action": ["dynamodb:PutItem"],
      "Resource": "arn:aws:dynamodb:us-east-1:000000000000:table/image-ingest-records"
    },
    {
      "Sid": "DecryptSourceObjects",
      "Effect": "Allow",
      "Action": ["kms:Decrypt", "kms:DescribeKey"],
      "Resource": "arn:aws:kms:us-east-1:000000000000:key/SRC_KEY_PLACEHOLDER"
    },
    {
      "Sid": "DecryptQueueMessages",
      "Effect": "Allow",
      "Action": ["kms:Decrypt", "kms:DescribeKey"],
      "Resource": "arn:aws:kms:us-east-1:000000000000:key/SQS_KEY_PLACEHOLDER"
    },
    {
      "Sid": "EncryptDestObjects",
      "Effect": "Allow",
      "Action": ["kms:Encrypt", "kms:GenerateDataKey", "kms:DescribeKey"],
      "Resource": "arn:aws:kms:us-east-1:000000000000:key/DEST_KEY_PLACEHOLDER"
    }
  ]
}

Attach scoped inline policy to lambda role

shell

source /app/build/env.sh
source /app/build/ids.sh
sed -e "s|SRC_KEY_PLACEHOLDER|$SRC_KEY|" -e "s|SQS_KEY_PLACEHOLDER|$SQS_KEY|" -e "s|DEST_KEY_PLACEHOLDER|$DEST_KEY|" /app/build/lambda-policy.json > /app/build/lambda-policy-final.json
cat /app/build/lambda-policy-final.json | jq '.Statement[] | {Sid, Action, Resource}'
aws iam put-role-policy --role-name image-ingest-lambda-role --policy-name image-ingest-lambda-inline --policy-document file:///app/build/lambda-policy-final.json
aws iam get-role-policy --role-name image-ingest-lambda-role --policy-name image-ingest-lambda-inline --query 'PolicyDocument.Statement[].Sid'

output

{
  "Sid": "Logs",
  "Action": [
    "logs:CreateLogGroup",
    "logs:CreateLogStream",
    "logs:PutLogEvents"
  ],
  "Resource": "arn:aws:logs:us-east-1:000000000000:log-group:/aws/lambda/image-ingest-consumer:*"
}
{
  "Sid": "ReadFromSourceBucket",
  "Action": [
    "s3:GetObject"
  ],
  "Resource": "arn:aws:s3:::ingest-source-bucket/*"
}
{
  "Sid": "WriteToDestBucket",
  "Action": [
    "s3:PutObject"
  ],
  "Resource": "arn:aws:s3:::ingest-dest-bucket/processed/*"
}
{
  "Sid": "ConsumeQueue",
  "Action": [
    "sqs:ReceiveMessage",
    "sqs:DeleteMessage",
    "sqs:GetQueueAttributes",
    "sqs:ChangeMessageVisibility"
  ],
  "Resource": "arn:aws:sqs:us-east-1:000000000000:ingest-events"
}
{
  "Sid": "WriteToDdb",
  "Action": [
    "dynamodb:PutItem"
  ],
  "Resource": "arn:aws:dynamodb:us-east-1:000000000000:table/image-ingest-records"
}
{
  "Sid": "DecryptSourceObjects",
  "Action": [
    "kms:Decrypt",
    "kms:DescribeKey"
  ],
  "Resource": "arn:aws:kms:us-east-1:000000000000:key/cfee14f6-ca89-4caa-8b60-c1526626a300"
}
{
  "Sid": "DecryptQueueMessages",
  "Action": [
    "kms:Decrypt",
    "kms:DescribeKey"
  ],
  "Resource": "arn:aws:kms:us-east-1:000000000000:key/87f146b4-bc5f-420c-bdfc-d88f28da2254"
}
{
  "Sid": "EncryptDestObjects",
  "Action": [
    "kms:Encrypt",
    "kms:GenerateDataKey",
    "kms:DescribeKey"
  ],
  "Resource": "arn:aws:kms:us-east-1:000000000000:key/b8b560df-2fa3-4d69-8009-6b56f9b54231"
}
[
    "Logs",
    "ReadFromSourceBucket",
    "WriteToDestBucket",
    "ConsumeQueue",
    "WriteToDdb",
    "DecryptSourceObjects",
    "DecryptQueueMessages",
    "EncryptDestObjects"
]

[stdout]
{
  "Sid": "Logs",
  "Action": [
    "logs:CreateLogGroup",
    "logs:CreateLogStream",
    "logs:PutLogEvents"
  ],
  "Resource": "arn:aws:logs:us-east-1:000000000000:log-group:/aws/lambda/image-ingest-consumer:*"
}
{
  "Sid": "ReadFromSourceBucket",
  "Action": [
    "s3:GetObject"
  ],
  "Resource": "arn:aws:s3:::ingest-source-bucket/*"
}
{
  "Sid": "WriteToDestBucket",
  "Action": [
    "s3:PutObject"
  ],
  "Resource": "arn:aws:s3:::ingest-dest-bucket/processed/*"
}
{
  "Sid": "ConsumeQueue",
  "Action": [
    "sqs:ReceiveMessage",
    "sqs:DeleteMessage",
    "sqs:GetQueueAttributes",
    "sqs:ChangeMessageVisibility"
  ],
  "Resource": "arn:aws:sqs:us-east-1:000000000000:ingest-events"
}
{
  "Sid": "WriteToDdb",
  "Action": [
    "dynamodb:PutItem"
  ],
  "Resource": "arn:aws:dynamodb:us-east-1:000000000000:table/image-ingest-records"
}
{
  "Sid": "DecryptSourceObjects",
  "Action": [
    "kms:Decrypt",
    "kms:DescribeKey"
  ],
  "Resource": "arn:aws:kms:us-east-1:000000000000:key/cfee14f6-ca89-4caa-8b60-c1526626a300"
}
{
  "Sid": "DecryptQueueMessages",
  "Action": [
    "kms:Decrypt",
    "kms:DescribeKey"
  ],
  "Resource": "arn:aws:kms:us-east-1:000000000000:key/87f146b4-bc5f-420c-bdfc-d88f28da2254"
}
{
  "Sid": "EncryptDestObjects",
  "Action": [
    "kms:Encrypt",
    "kms:GenerateDataKey",
    "kms:DescribeKey"
  ],
  "Resource": "arn:aws:kms:us-east-1:000000000000:key/b8b560df-2fa3-4d69-8009-6b56f9b54231"
}
[
    "Logs",
    "ReadFromSourceBucket",
    "WriteToDestBucket",
    "ConsumeQueue",
    "WriteToDdb",
    "DecryptSourceObjects",
    "DecryptQueueMessages",
    "EncryptDestObjects"
]

write · /app/build/handler.py

import json
import os
import urllib.parse
from datetime import datetime, timezone

import boto3

_endpoint = os.environ.get("AWS_ENDPOINT_URL") or None
_region = os.environ.get("AWS_DEFAULT_REGION", "us-east-1")

s3 = boto3.client("s3", endpoint_url=_endpoint, region_name=_region)
ddb = boto3.client("dynamodb", endpoint_url=_endpoint, region_name=_region)

DEST_BUCKET = os.environ["DEST_BUCKET"]
DEST_KMS_KEY = os.environ["DEST_KMS_KEY"]
DDB_TABLE = os.environ["DDB_TABLE"]


def _process_record(record):
    body = json.loads(record["body"])
    s3_records = body.get("Records")
    if not s3_records:
        raise ValueError("no s3 records in sqs body")

    for s3_rec in s3_records:
        src_bucket = s3_rec["s3"]["bucket"]["name"]
        raw_key = s3_rec["s3"]["object"]["key"]
        key = urllib.parse.unquote_plus(raw_key)

        obj = s3.get_object(Bucket=src_bucket, Key=key)
        body_bytes = obj["Body"].read()
        size = len(body_bytes)

        s3.put_object(
            Bucket=DEST_BUCKET,
            Key=f"processed/{key}",
            Body=body_bytes,
            ServerSideEncryption="aws:kms",
            SSEKMSKeyId=DEST_KMS_KEY,
        )

        ddb.put_item(
            TableName=DDB_TABLE,
            Item={
                "object_key": {"S": key},
                "source_size": {"N": str(size)},
                "processed_at": {"S": datetime.now(timezone.utc).isoformat()},
                "status": {"S": "OK"},
            },
        )


def lambda_handler(event, context):
    failures = []
    for record in event.get("Records", []):
        message_id = record.get("messageId")
        try:
            _process_record(record)
        except Exception as exc:
            print(f"record {message_id} failed: {exc!r}")
            failures.append({"itemIdentifier": message_id})
    return {"batchItemFailures": failures}

Package and deploy lambda function

shell

source /app/build/env.sh
source /app/build/ids.sh
cd /app/build
rm -f handler.zip
zip -q handler.zip handler.py
ls -la handler.zip

DEST_KMS_KEY_ARN="arn:aws:kms:us-east-1:000000000000:alias/dest-bucket-cmk"

aws lambda create-function \
  --function-name image-ingest-consumer \
  --runtime python3.11 \
  --role arn:aws:iam::000000000000:role/image-ingest-lambda-role \
  --handler handler.lambda_handler \
  --zip-file fileb:///app/build/handler.zip \
  --timeout 30 \
  --memory-size 256 \
  --environment "Variables={AWS_ENDPOINT_URL=http://localstack:4566,DEST_BUCKET=ingest-dest-bucket,DEST_KMS_KEY=$DEST_KMS_KEY_ARN,DDB_TABLE=image-ingest-records}" \
  --query 'FunctionArn' --output text

output

-rw-r--r-- 1 root root 974 Apr 23 06:04 handler.zip
arn:aws:lambda:us-east-1:000000000000:function:image-ingest-consumer

[stdout]
-rw-r--r-- 1 root root 974 Apr 23 06:04 handler.zip
arn:aws:lambda:us-east-1:000000000000:function:image-ingest-consumer

Wait for lambda active

shell

source /app/build/env.sh
# wait for lambda to be active
until aws lambda get-function --function-name image-ingest-consumer --query 'Configuration.State' --output text | grep -q Active; do sleep 1; done
aws lambda get-function --function-name image-ingest-consumer --query 'Configuration.{State:State,Timeout:Timeout}' --output json

output

{
    "State": "Active",
    "Timeout": 30
}

[stdout]
{
    "State": "Active",
    "Timeout": 30
}

Create event source mapping with ReportBatchItemFailures

shell

source /app/build/env.sh
source /app/build/ids.sh
aws lambda create-event-source-mapping \
  --function-name image-ingest-consumer \
  --event-source-arn $MQ_ARN \
  --batch-size 10 \
  --function-response-types ReportBatchItemFailures \
  --query 'UUID' --output text

output

1ce7f84f-33bd-46ae-b946-b20983a4b919

[stdout]
1ce7f84f-33bd-46ae-b946-b20983a4b919

Wait for ESM enabled

shell

source /app/build/env.sh
aws lambda list-event-source-mappings --function-name image-ingest-consumer --query 'EventSourceMappings[0].{State:State,FRT:FunctionResponseTypes}' --output json
# wait for it to enable
until aws lambda list-event-source-mappings --function-name image-ingest-consumer --query 'EventSourceMappings[0].State' --output text | grep -q Enabled; do sleep 1; done
aws lambda list-event-source-mappings --function-name image-ingest-consumer --query 'EventSourceMappings[0].{State:State,FRT:FunctionResponseTypes}' --output json

output

{
    "State": "Enabled",
    "FRT": [
        "ReportBatchItemFailures"
    ]
}
{
    "State": "Enabled",
    "FRT": [
        "ReportBatchItemFailures"
    ]
}

[stdout]
{
    "State": "Enabled",
    "FRT": [
        "ReportBatchItemFailures"
    ]
}
{
    "State": "Enabled",
    "FRT": [
        "ReportBatchItemFailures"
    ]
}

Create KMS keys + aliases
Create lambda IAM role
Create S3 buckets with SSE-KMS defaults
Create DynamoDB table
Create SQS DLQ and main queue (SSE-KMS, redrive)
Wire S3 notification to SQS
Attach scoped policies to lambda role
Build + deploy lambda with handler
Create event source mapping with ReportBatchItemFailures
End-to-end smoke test: basic key
Smoke test: key with spaces
Smoke test: partial batch failure response shape

Smoke test basic key

shell

source /app/build/env.sh
echo "hello world payload 1" > /tmp/a.txt
aws s3api put-object --bucket ingest-source-bucket --key plain.txt --body /tmp/a.txt --query 'ETag' --output text
sleep 5
aws s3api list-objects-v2 --bucket ingest-dest-bucket --query 'Contents[].Key'
aws dynamodb scan --table-name image-ingest-records --query 'Items[].{k:object_key.S,size:source_size.N,status:status.S}'

output

"225f92be81fd679c49e4cc461ca82e65"
[
    "processed/plain.txt"
]
[
    {
        "k": "plain.txt",
        "size": "22",
        "status": "OK"
    }
]

[stdout]
"225f92be81fd679c49e4cc461ca82e65"
[
    "processed/plain.txt"
]
[
    {
        "k": "plain.txt",
        "size": "22",
        "status": "OK"
    }
]

Basic path works. Let me confirm the processed object is KMS-encrypted with the dest CMK and test a key with spaces.

Verify SSE-KMS and test key with spaces

shell

source /app/build/env.sh
aws s3api head-object --bucket ingest-dest-bucket --key processed/plain.txt --query '{enc:ServerSideEncryption,kms:SSEKMSKeyId}'

echo "image with spaces" > "/tmp/b with space.txt"
aws s3api put-object --bucket ingest-source-bucket --key "hello world/some file.png" --body "/tmp/b with space.txt" --query 'ETag' --output text
sleep 5
aws s3api list-objects-v2 --bucket ingest-dest-bucket --query 'Contents[].Key'
aws dynamodb scan --table-name image-ingest-records --query 'Items[].{k:object_key.S,size:source_size.N,status:status.S}'
aws sqs get-queue-attributes --queue-url http://sqs.us-east-1.localhost.localstack.cloud:4566/000000000000/ingest-dlq --attribute-names ApproximateNumberOfMessages --query 'Attributes.ApproximateNumberOfMessages' --output text

output

{
    "enc": "aws:kms",
    "kms": "arn:aws:kms:us-east-1:000000000000:alias/dest-bucket-cmk"
}
"0c08c7db2d0e7dab249e35eb03c2ece2"
[
    "processed/plain.txt"
]
[
    {
        "k": "plain.txt",
        "size": "22",
        "status": "OK"
    }
]
0

[stdout]
{
    "enc": "aws:kms",
    "kms": "arn:aws:kms:us-east-1:000000000000:alias/dest-bucket-cmk"
}
"0c08c7db2d0e7dab249e35eb03c2ece2"
[
    "processed/plain.txt"
]
[
    {
        "k": "plain.txt",
        "size": "22",
        "status": "OK"
    }
]
0

Recheck after longer wait

shell

source /app/build/env.sh
sleep 8
aws s3api list-objects-v2 --bucket ingest-dest-bucket --query 'Contents[].Key'
aws dynamodb scan --table-name image-ingest-records --query 'Items[].{k:object_key.S}'
echo "---main queue depth---"
aws sqs get-queue-attributes --queue-url http://sqs.us-east-1.localhost.localstack.cloud:4566/000000000000/ingest-events --attribute-names ApproximateNumberOfMessages --query 'Attributes.ApproximateNumberOfMessages' --output text
echo "---dlq depth---"
aws sqs get-queue-attributes --queue-url http://sqs.us-east-1.localhost.localstack.cloud:4566/000000000000/ingest-dlq --attribute-names ApproximateNumberOfMessages --query 'Attributes.ApproximateNumberOfMessages' --output text

output

[
    "processed/hello world/some file.png",
    "processed/plain.txt"
]
[
    {
        "k": "plain.txt"
    },
    {
        "k": "hello world/some file.png"
    }
]
---main queue depth---
0
---dlq depth---
0

[stdout]
[
    "processed/hello world/some file.png",
    "processed/plain.txt"
]
[
    {
        "k": "plain.txt"
    },
    {
        "k": "hello world/some file.png"
    }
]
---main queue depth---
0
---dlq depth---
0

Both the basic key and the space-containing key processed correctly , `processed/hello world/some file.png` landed with the decoded key and a matching DDB row. Nothing in the DLQ.

Create KMS keys + aliases
Create lambda IAM role
Create S3 buckets with SSE-KMS defaults
Create DynamoDB table
Create SQS DLQ and main queue (SSE-KMS, redrive)
Wire S3 notification to SQS
Attach scoped policies to lambda role
Build + deploy lambda with handler
Create event source mapping with ReportBatchItemFailures
End-to-end smoke test: basic key
Smoke test: key with spaces
Smoke test: partial batch failure response shape

Now invoke the handler directly with a crafted batch (one good record, one with malformed body) to confirm the partial-batch-failure response shape.

write · /app/build/partial-event.json

{
  "Records": [
    {
      "messageId": "good-msg-id",
      "receiptHandle": "rh1",
      "body": "{\"Records\":[{\"s3\":{\"bucket\":{\"name\":\"ingest-source-bucket\"},\"object\":{\"key\":\"plain.txt\"}}}]}",
      "eventSource": "aws:sqs"
    },
    {
      "messageId": "bad-msg-id",
      "receiptHandle": "rh2",
      "body": "not-json-at-all",
      "eventSource": "aws:sqs"
    }
  ]
}

Invoke handler with mixed good/bad batch

shell

source /app/build/env.sh
aws lambda invoke --function-name image-ingest-consumer --payload fileb:///app/build/partial-event.json /tmp/out.json --cli-binary-format raw-in-base64-out >/dev/null
cat /tmp/out.json
echo
echo "---"
jq . /tmp/out.json

output

{"batchItemFailures": [{"itemIdentifier": "bad-msg-id"}]}
---
{
  "batchItemFailures": [
    {
      "itemIdentifier": "bad-msg-id"
    }
  ]
}

[stdout]
{"batchItemFailures": [{"itemIdentifier": "bad-msg-id"}]}
---
{
  "batchItemFailures": [
    {
      "itemIdentifier": "bad-msg-id"
    }
  ]
}

Exactly the contract , only the broken record's id is returned, good one's not.

Create KMS keys + aliases
Create lambda IAM role
Create S3 buckets with SSE-KMS defaults
Create DynamoDB table
Create SQS DLQ and main queue (SSE-KMS, redrive)
Wire S3 notification to SQS
Attach scoped policies to lambda role
Build + deploy lambda with handler
Create event source mapping with ReportBatchItemFailures
End-to-end smoke test: basic key
Smoke test: key with spaces
Smoke test: partial batch failure response shape

All up and verified. Quick rundown of what's live: **KMS (3 CMKs, resource-scoped grants , no wildcards on actions/resources for lambda)** - `alias/source-bucket-cmk` , lambda role has `kms:Decrypt, DescribeKey` only - `alias/sqs-queue-cmk` , S3 service principal has `GenerateDataKey, Decrypt`; lambda role has `Decrypt, DescribeKey` - `alias/dest-bucket-cmk` , lambda role has `Encrypt, GenerateDataKey, DescribeKey` **Storage** - `ingest-source-bucket`, `ingest-dest-bucket` , default SSE-KMS with their respective CMKs; `BucketKeyEnabled` - `image-ingest-records` , DDB pay-per-request, pk `object_key` (S) **Queue** - `ingest-events` , SSE-KMS via `alias/sqs-queue-cmk`, visibility 60s (> lambda timeout 30s), redrive to DLQ at `maxReceiveCount=5`; queue policy allows only `s3.amazonaws.com` with `SourceArn=ingest-source-bucket` + `SourceAccount` conditions - `ingest-dlq` , SSE-KMS **Notification**: `ingest-source-bucket` → `s3:ObjectCreated:*` → `ingest-events` **Lambda** (`image-ingest-consumer`, python3.11, handler `handler.lambda_handler`) - Inline role policy is Sid-per-permission, resource-scoped (bucket ARNs, queue ARN, table ARN, each CMK ARN); no `Resource:"*"` or `kms:*` - Event source mapping has `FunctionResponseTypes=[ReportBatchItemFailures]` - Handler `urllib.parse.unquote_plus`es the S3 event key, per-record try/except, returns `{batchItemFailures:[{itemIdentifier}…]}` only for failed records **Verified** - PUT `plain.txt` → `processed/plain.txt` encrypted with dest CMK, DDB row `{object_key, source_size:22, processed_at, status:OK}`, DLQ empty - PUT `hello world/some file.png` (spaces + `/`) → decoded correctly, processed copy at the decoded key, DDB row present - Direct invoke with `[good, bad]` batch → response is exactly `{"batchItemFailures":[{"itemIdentifier":"bad-msg-id"}]}` , good record not retried

Final diff , what the agent changed

No file changes, the agent left the workspace untouched.

Verifier output , the proof behind the reward

tests/test.sh

============================= test session starts ==============================
platform linux -- Python 3.12.3, pytest-8.4.1, pluggy-1.6.0 -- /root/.cache/uv/archive-v0/7YvzzIRHeSzayjRA0nQlt/bin/python
cachedir: .pytest_cache
rootdir: /tests
plugins: json-ctrf-0.3.5
collecting ... collected 18 items

../tests/test_outputs.py::test_aws_cli_binary_is_real PASSED             [  5%]
../tests/test_outputs.py::test_localstack_reachable PASSED               [ 11%]
../tests/test_outputs.py::test_source_and_dest_buckets_use_customer_cmks FAILED [ 16%]
../tests/test_outputs.py::test_main_queue_and_dlq_exist_and_are_encrypted FAILED [ 22%]
../tests/test_outputs.py::test_lambda_exists_with_expected_handler PASSED [ 27%]
../tests/test_outputs.py::test_ddb_table_exists PASSED                   [ 33%]
../tests/test_outputs.py::test_source_bucket_notification_targets_main_queue PASSED [ 38%]
../tests/test_outputs.py::test_main_queue_policy_allows_s3_service PASSED [ 44%]
../tests/test_outputs.py::test_sqs_cmk_allows_s3_service PASSED          [ 50%]
../tests/test_outputs.py::test_source_cmk_allows_lambda_role_decrypt PASSED [ 55%]
../tests/test_outputs.py::test_dest_cmk_allows_lambda_role_encrypt PASSED [ 61%]
../tests/test_outputs.py::test_lambda_role_has_kms_decrypt_on_sqs_cmk PASSED [ 66%]
../tests/test_outputs.py::test_main_queue_visibility_timeout_covers_lambda_timeout PASSED [ 72%]
../tests/test_outputs.py::test_event_source_mapping_declares_report_batch_item_failures PASSED [ 77%]
../tests/test_outputs.py::test_lambda_handler_returns_correct_response_shape PASSED [ 83%]
../tests/test_outputs.py::test_end_to_end_preserves_object_size PASSED   [ 88%]
../tests/test_outputs.py::test_end_to_end_key_with_spaces_is_decoded PASSED [ 94%]
../tests/test_outputs.py::test_end_to_end_upload_propagates_to_dest_and_ddb PASSED [100%]

=================================== FAILURES ===================================
________________ test_source_and_dest_buckets_use_customer_cmks ________________

s3 = <botocore.client.S3 object at 0xffffa060fb60>
kms = <botocore.client.KMS object at 0xffff9ea5d3a0>

    def test_source_and_dest_buckets_use_customer_cmks(s3, kms):
        """Buckets use CMKs."""
        src_cfg = s3.get_bucket_encryption(Bucket=SRC_BUCKET)
        src_rules = src_cfg["ServerSideEncryptionConfiguration"]["Rules"]
        assert src_rules, f"{SRC_BUCKET} has no SSE rules"
        src_sse = src_rules[0]["ApplyServerSideEncryptionByDefault"]
        assert src_sse["SSEAlgorithm"] == "aws:kms", (
            f"{SRC_BUCKET} not using aws:kms: {src_sse}"
        )
        src_cmk_id = _resolve_key_id(kms, SRC_CMK_ALIAS)
>       assert src_cmk_id in src_sse.get("KMSMasterKeyID", ""), (
            f"{SRC_BUCKET} not using {SRC_CMK_ALIAS} ({src_cmk_id}), got "
            f"{src_sse.get('KMSMasterKeyID')}"
        )
E       AssertionError: ingest-source-bucket not using alias/source-bucket-cmk (cfee14f6-ca89-4caa-8b60-c1526626a300), got arn:aws:kms:us-east-1:000000000000:alias/source-bucket-cmk
E       assert 'cfee14f6-ca89-4caa-8b60-c1526626a300' in 'arn:aws:kms:us-east-1:000000000000:alias/source-bucket-cmk'
E        +  where 'arn:aws:kms:us-east-1:000000000000:alias/source-bucket-cmk' = <built-in method get of dict object at 0xffff9e952b00>('KMSMasterKeyID', '')
E        +    where <built-in method get of dict object at 0xffff9e952b00> = {'KMSMasterKeyID': 'arn:aws:kms:us-east-1:000000000000:alias/source-bucket-cmk', 'SSEAlgorithm': 'aws:kms'}.get

/tests/test_outputs.py:175: AssertionError
_______________ test_main_queue_and_dlq_exist_and_are_encrypted ________________

sqs = <botocore.client.SQS object at 0xffff9e9bcc20>
kms = <botocore.client.KMS object at 0xffff9ea5d3a0>

    def test_main_queue_and_dlq_exist_and_are_encrypted(sqs, kms):
        """Queues encrypted."""
        main_url = _queue_url(sqs, MAIN_QUEUE)
        main_attrs = _queue_attrs(sqs, main_url)
        assert main_attrs.get("KmsMasterKeyId"), (
            f"{MAIN_QUEUE} missing KmsMasterKeyId (SSE-KMS)"
        )
        expected = _resolve_key_id(kms, SQS_CMK_ALIAS)
>       assert expected in main_attrs["KmsMasterKeyId"] or main_attrs[
            "KmsMasterKeyId"
        ].endswith(expected), (
            f"{MAIN_QUEUE} encrypted with {main_attrs['KmsMasterKeyId']}, "
            f"expected {SQS_CMK_ALIAS} ({expected})"
        )
E       AssertionError: ingest-events encrypted with alias/sqs-queue-cmk, expected alias/sqs-queue-cmk (87f146b4-bc5f-420c-bdfc-d88f28da2254)
E       assert ('87f146b4-bc5f-420c-bdfc-d88f28da2254' in 'alias/sqs-queue-cmk' or False)
E        +  where False = <built-in method endswith of str object at 0xffff9e8249b0>('87f146b4-bc5f-420c-bdfc-d88f28da2254')
E        +    where <built-in method endswith of str object at 0xffff9e8249b0> = 'alias/sqs-queue-cmk'.endswith

/tests/test_outputs.py:199: AssertionError
=============================== warnings summary ===============================
test_outputs.py: 65 warnings
  /root/.cache/uv/archive-v0/7YvzzIRHeSzayjRA0nQlt/lib/python3.12/site-packages/botocore/auth.py:424: DeprecationWarning: datetime.datetime.utcnow() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.now(datetime.UTC).
    datetime_now = datetime.datetime.utcnow()

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
==================================== PASSES ====================================
=========================== short test summary info ============================
PASSED ../tests/test_outputs.py::test_aws_cli_binary_is_real
PASSED ../tests/test_outputs.py::test_localstack_reachable
PASSED ../tests/test_outputs.py::test_lambda_exists_with_expected_handler
PASSED ../tests/test_outputs.py::test_ddb_table_exists
PASSED ../tests/test_outputs.py::test_source_bucket_notification_targets_main_queue
PASSED ../tests/test_outputs.py::test_main_queue_policy_allows_s3_service
PASSED ../tests/test_outputs.py::test_sqs_cmk_allows_s3_service
PASSED ../tests/test_outputs.py::test_source_cmk_allows_lambda_role_decrypt
PASSED ../tests/test_outputs.py::test_dest_cmk_allows_lambda_role_encrypt
PASSED ../tests/test_outputs.py::test_lambda_role_has_kms_decrypt_on_sqs_cmk
PASSED ../tests/test_outputs.py::test_main_queue_visibility_timeout_covers_lambda_timeout
PASSED ../tests/test_outputs.py::test_event_source_mapping_declares_report_batch_item_failures
PASSED ../tests/test_outputs.py::test_lambda_handler_returns_correct_response_shape
PASSED ../tests/test_outputs.py::test_end_to_end_preserves_object_size
PASSED ../tests/test_outputs.py::test_end_to_end_key_with_spaces_is_decoded
PASSED ../tests/test_outputs.py::test_end_to_end_upload_propagates_to_dest_and_ddb
FAILED ../tests/test_outputs.py::test_source_and_dest_buckets_use_customer_cmks
FAILED ../tests/test_outputs.py::test_main_queue_and_dlq_exist_and_are_encrypted
================== 2 failed, 16 passed, 65 warnings in 19.89s ==================

Reproduce this trial: git checkout 2f94510 && PYTHONPATH=src python3 scripts/build_site.py , then open trial/trial_1d55f0f1889741b0. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.

Trial trial_1d55f0f1889741b0 · verifier authoritative; classifier explanatory.