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.

SubtypeBrittle Tests - Tests reject correct solutions due to strict assertion logic

EvidenceTest assertions in test_outputs.py lines 43-48 and 66-71 check if the resolved UUID is present in the KMSMasterKeyID value: `assert src_cmk_id in src_sse.get("KMSMasterKeyID", "")`. Agent correctly set KMSMasterKeyID to the alias (`alias/source-bucket-cmk`) as instructed, but the test expects the actual key UUID to be stored. Both are valid AWS configurations, AWS accepts encryption specified via alias OR key ID. The test should accept both forms or instructions should explicitly require the key ID form, not the alias.

Root causeThe instruction explicitly tells agents to use exact alias names ("names the verifier grabs by hand, use them exactly"). The agent followed this correctly by using aliases. However, the test expects the resolved UUID key ID to be stored, rejecting the valid alias-based configuration. AWS allows both forms, so the test's assertion is overly strict.

RecommendationFix the test assertions to accept either the key ID OR the alias. Change the assertion from `assert expected in main_attrs["KmsMasterKeyID"]` to `assert (expected in main_attrs["KmsMasterKeyID"]) or (main_attrs["KmsMasterKeyID"] == alias_value)`. Alternatively, update the instruction to explicitly state that agents must resolve aliases to their actual key IDs before using them in the bucket/queue encryption configuration, not use the alias names directly."

Trajectory

Tool-by-tool agent trajectory

36 tool calls · 4 tool types · 46 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 versions and localstack connectivity

shell

aws --version && python3 --version && echo "---" && aws --endpoint-url=http://localstack:4566 sts get-caller-identity

output

aws-cli/2.34.33 Python/3.14.4 Linux/6.10.14-linuxkit exe/aarch64.ubuntu.24
Python 3.12.3
---
{
    "UserId": "AKIAIOSFODNN7EXAMPLE",
    "Account": "000000000000",
    "Arn": "arn:aws:iam::000000000000:root"
}

[stdout]
aws-cli/2.34.33 Python/3.14.4 Linux/6.10.14-linuxkit exe/aarch64.ubuntu.24
Python 3.12.3
---
{
    "UserId": "AKIAIOSFODNN7EXAMPLE",
    "Account": "000000000000",
    "Arn": "arn:aws:iam::000000000000:root"
}

Create workspace

shell

mkdir -p /app/build && cd /app/build && echo "workspace ready" && export AWS_ENDPOINT_URL=http://localstack:4566 && env | grep AWS

output

workspace ready
AWS_DEFAULT_REGION=us-east-1
AWS_PAGER=
AWS_SECRET_ACCESS_KEY=test
AWS_ACCESS_KEY_ID=test
AWS_ENDPOINT_URL=http://localstack:4566

[stdout]
workspace ready
AWS_DEFAULT_REGION=us-east-1
AWS_PAGER=
AWS_SECRET_ACCESS_KEY=test
AWS_ACCESS_KEY_ID=test
AWS_ENDPOINT_URL=http://localstack:4566

ToolSearch

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

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

Create 3 KMS CMKs with aliases (source, sqs, dest)
Create DynamoDB table image-ingest-records
Create SQS DLQ + main queue with SSE-KMS + redrive
Create source/dest S3 buckets with SSE-KMS
Configure source bucket notification -> SQS (with queue policy)
Create lambda IAM role with least-privilege policies
Write handler.py with URL-decoding + partial batch failures
Deploy lambda + create event source mapping
Smoke test: PUT object, verify dest + ddb + empty DLQ
Test space-in-key + partial batch failure

I'll set `AWS_ENDPOINT_URL` in the environment to simplify commands, then build this bottom-up (KMS → DDB → queues → buckets → IAM → lambda).

write · /app/build/env.sh

export AWS_ENDPOINT_URL=http://localstack:4566
export AWS_DEFAULT_REGION=us-east-1
export AWS_ACCESS_KEY_ID=test
export AWS_SECRET_ACCESS_KEY=test
export ACCOUNT=000000000000

Now create 3 KMS CMKs. Each key's policy must restrict access to just the principals that need it. I'll allow the account root full admin (standard AWS boilerplate for key management) and grant only specific operations to the lambda role ARN (deterministic, since localstack uses fixed account id).

write · /app/build/kms-source-policy.json

{
  "Version": "2012-10-17",
  "Id": "source-bucket-cmk-policy",
  "Statement": [
    {
      "Sid": "EnableRootAdmin",
      "Effect": "Allow",
      "Principal": {"AWS": "arn:aws:iam::000000000000:root"},
      "Action": "kms:*",
      "Resource": "*"
    },
    {
      "Sid": "AllowS3ServiceUse",
      "Effect": "Allow",
      "Principal": {"Service": "s3.amazonaws.com"},
      "Action": [
        "kms:Decrypt",
        "kms:GenerateDataKey"
      ],
      "Resource": "*"
    },
    {
      "Sid": "AllowLambdaRoleDecrypt",
      "Effect": "Allow",
      "Principal": {"AWS": "arn:aws:iam::000000000000:role/image-ingest-lambda-role"},
      "Action": [
        "kms:Decrypt"
      ],
      "Resource": "*"
    }
  ]
}

write · /app/build/kms-sqs-policy.json

{
  "Version": "2012-10-17",
  "Id": "sqs-queue-cmk-policy",
  "Statement": [
    {
      "Sid": "EnableRootAdmin",
      "Effect": "Allow",
      "Principal": {"AWS": "arn:aws:iam::000000000000:root"},
      "Action": "kms:*",
      "Resource": "*"
    },
    {
      "Sid": "AllowS3ServiceToEnqueue",
      "Effect": "Allow",
      "Principal": {"Service": "s3.amazonaws.com"},
      "Action": [
        "kms:Decrypt",
        "kms:GenerateDataKey"
      ],
      "Resource": "*"
    },
    {
      "Sid": "AllowLambdaRoleConsume",
      "Effect": "Allow",
      "Principal": {"AWS": "arn:aws:iam::000000000000:role/image-ingest-lambda-role"},
      "Action": [
        "kms:Decrypt",
        "kms:GenerateDataKey"
      ],
      "Resource": "*"
    }
  ]
}

write · /app/build/kms-dest-policy.json

{
  "Version": "2012-10-17",
  "Id": "dest-bucket-cmk-policy",
  "Statement": [
    {
      "Sid": "EnableRootAdmin",
      "Effect": "Allow",
      "Principal": {"AWS": "arn:aws:iam::000000000000:root"},
      "Action": "kms:*",
      "Resource": "*"
    },
    {
      "Sid": "AllowLambdaRoleEncrypt",
      "Effect": "Allow",
      "Principal": {"AWS": "arn:aws:iam::000000000000:role/image-ingest-lambda-role"},
      "Action": [
        "kms:Encrypt",
        "kms:GenerateDataKey"
      ],
      "Resource": "*"
    }
  ]
}

Create 3 KMS keys and aliases

shell

source env.sh && \
SRC_KEY=$(aws kms create-key --description "source bucket CMK" --policy file://kms-source-policy.json --query 'KeyMetadata.KeyId' --output text) && echo "SRC_KEY=$SRC_KEY" && \
SQS_KEY=$(aws kms create-key --description "sqs queue CMK" --policy file://kms-sqs-policy.json --query 'KeyMetadata.KeyId' --output text) && echo "SQS_KEY=$SQS_KEY" && \
DST_KEY=$(aws kms create-key --description "dest bucket CMK" --policy file://kms-dest-policy.json --query 'KeyMetadata.KeyId' --output text) && echo "DST_KEY=$DST_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 "$DST_KEY" && \
echo "SRC_KEY=$SRC_KEY" > keys.env && \
echo "SQS_KEY=$SQS_KEY" >> keys.env && \
echo "DST_KEY=$DST_KEY" >> keys.env && \
cat keys.env

output

SRC_KEY=d96a6af1-8a26-45cd-b2ff-7daa04fdf5fb
SQS_KEY=e17db9db-0f42-4b14-9cfe-4a47f088ef89
DST_KEY=386438ac-69b0-4a36-a1a5-18dd00163f19
SRC_KEY=d96a6af1-8a26-45cd-b2ff-7daa04fdf5fb
SQS_KEY=e17db9db-0f42-4b14-9cfe-4a47f088ef89
DST_KEY=386438ac-69b0-4a36-a1a5-18dd00163f19

[stdout]
SRC_KEY=d96a6af1-8a26-45cd-b2ff-7daa04fdf5fb
SQS_KEY=e17db9db-0f42-4b14-9cfe-4a47f088ef89
DST_KEY=386438ac-69b0-4a36-a1a5-18dd00163f19
SRC_KEY=d96a6af1-8a26-45cd-b2ff-7daa04fdf5fb
SQS_KEY=e17db9db-0f42-4b14-9cfe-4a47f088ef89
DST_KEY=386438ac-69b0-4a36-a1a5-18dd00163f19

Create DynamoDB table

shell

source 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.TableStatus' --output text && \
aws dynamodb wait table-exists --table-name image-ingest-records && \
echo "ddb ready"

output

ACTIVE
ddb ready

[stdout]
ACTIVE
ddb ready

Create 3 KMS CMKs with aliases (source, sqs, dest)
Create DynamoDB table image-ingest-records
Create SQS DLQ + main queue with SSE-KMS + redrive
Create source/dest S3 buckets with SSE-KMS
Configure source bucket notification -> SQS (with queue policy)
Create lambda IAM role with least-privilege policies
Write handler.py with URL-decoding + partial batch failures
Deploy lambda + create event source mapping
Smoke test: PUT object, verify dest + ddb + empty DLQ
Test space-in-key + partial batch failure

Create DLQ with SSE-KMS

shell

source env.sh && source keys.env && \
DLQ_URL=$(aws sqs create-queue --queue-name ingest-dlq \
  --attributes "{\"KmsMasterKeyId\":\"alias/sqs-queue-cmk\",\"MessageRetentionPeriod\":\"1209600\"}" \
  --query QueueUrl --output text) && \
echo "DLQ_URL=$DLQ_URL" && \
DLQ_ARN=$(aws sqs get-queue-attributes --queue-url "$DLQ_URL" --attribute-names QueueArn --query 'Attributes.QueueArn' --output text) && \
echo "DLQ_ARN=$DLQ_ARN" && \
echo "DLQ_URL=$DLQ_URL" > queues.env && echo "DLQ_ARN=$DLQ_ARN" >> queues.env

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

[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

Create main queue with SSE-KMS and redrive policy

shell

source env.sh && source keys.env && source queues.env && \
REDRIVE=$(printf '{"deadLetterTargetArn":"%s","maxReceiveCount":"5"}' "$DLQ_ARN" | python3 -c 'import json,sys; print(json.dumps(sys.stdin.read()))') && \
ATTRS=$(python3 -c "import json; print(json.dumps({'KmsMasterKeyId':'alias/sqs-queue-cmk','VisibilityTimeout':'180','MessageRetentionPeriod':'345600','RedrivePolicy':json.dumps({'deadLetterTargetArn':'$DLQ_ARN','maxReceiveCount':5})}))") && \
echo "ATTRS=$ATTRS" && \
Q_URL=$(aws sqs create-queue --queue-name ingest-events --attributes "$ATTRS" --query QueueUrl --output text) && \
echo "Q_URL=$Q_URL" && \
Q_ARN=$(aws sqs get-queue-attributes --queue-url "$Q_URL" --attribute-names QueueArn --query 'Attributes.QueueArn' --output text) && \
echo "Q_ARN=$Q_ARN" && \
echo "Q_URL=$Q_URL" >> queues.env && echo "Q_ARN=$Q_ARN" >> queues.env && \
aws sqs get-queue-attributes --queue-url "$Q_URL" --attribute-names All

output

ATTRS={"KmsMasterKeyId": "alias/sqs-queue-cmk", "VisibilityTimeout": "180", "MessageRetentionPeriod": "345600", "RedrivePolicy": "{\"deadLetterTargetArn\": \"arn:aws:sqs:us-east-1:000000000000:ingest-dlq\", \"maxReceiveCount\": 5}"}
Q_URL=http://sqs.us-east-1.localhost.localstack.cloud:4566/000000000000/ingest-events
Q_ARN=arn:aws:sqs:us-east-1:000000000000:ingest-events
{
    "Attributes": {
        "CreatedTimestamp": "1776849679",
        "DelaySeconds": "0",
        "LastModifiedTimestamp": "1776849679",
        "MaximumMessageSize": "1048576",
        "MessageRetentionPeriod": "345600",
        "QueueArn": "arn:aws:sqs:us-east-1:000000000000:ingest-events",
        "ReceiveMessageWaitTimeSeconds": "0",
        "VisibilityTimeout": "180",
        "SqsManagedSseEnabled": "true",
        "KmsMasterKeyId": "alias/sqs-queue-cmk",
        "RedrivePolicy": "{\"deadLetterTargetArn\": \"arn:aws:sqs:us-east-1:000000000000:ingest-dlq\", \"maxReceiveCount\": 5}",
        "ApproximateNumberOfMessages": "0",
        "ApproximateNumberOfMessagesDelayed": "0",
        "ApproximateNumberOfMessagesNotVisible": "0"
    }
}

[stdout]
ATTRS={"KmsMasterKeyId": "alias/sqs-queue-cmk", "VisibilityTimeout": "180", "MessageRetentionPeriod": "345600", "RedrivePolicy": "{\"deadLetterTargetArn\": \"arn:aws:sqs:us-east-1:000000000000:ingest-dlq\", \"maxReceiveCount\": 5}"}
Q_URL=http://sqs.us-east-1.localhost.localstack.cloud:4566/000000000000/ingest-events
Q_ARN=arn:aws:sqs:us-east-1:000000000000:ingest-events
{
    "Attributes": {
        "CreatedTimestamp": "1776849679",
        "DelaySeconds": "0",
        "LastModifiedTimestamp": "1776849679",
        "MaximumMessageSize": "1048576",
        "MessageRetentionPeriod": "345600",
        "QueueArn": "arn:aws:sqs:us-east-1:000000000000:ingest-events",
        "ReceiveMessageWaitTimeSeconds": "0",
        "VisibilityTimeout": "180",
        "SqsManagedSseEnabled": "true",
        "KmsMasterKeyId": "alias/sqs-queue-cmk",
        "RedrivePolicy": "{\"deadLetterTargetArn\": \"arn:aws:sqs:us-east-1:000000000000:ingest-dlq\", \"maxReceiveCount\": 5}",
        "ApproximateNumberOfMessages": "0",
        "ApproximateNumberOfMessagesDelayed": "0",
        "ApproximateNumberOfMessagesNotVisible": "0"
    }
}

Queue is good: KMS alias applied, redrive in place, 180s visibility (much larger than the 30s lambda timeout I'll set). Now the SQS resource policy so S3 can deliver notifications to it.

write · /app/build/sqs-policy.json

{
  "Version": "2012-10-17",
  "Id": "ingest-events-policy",
  "Statement": [
    {
      "Sid": "AllowS3SourceBucket",
      "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"}
      }
    }
  ]
}

Attach SQS resource policy

shell

source env.sh && source queues.env && \
POLICY=$(python3 -c "import json; print(json.dumps({'Policy': open('sqs-policy.json').read()}))") && \
aws sqs set-queue-attributes --queue-url "$Q_URL" --attributes "$POLICY" && \
echo "queue policy set"

output

queue policy set

[stdout]
queue policy set

Create 3 KMS CMKs with aliases (source, sqs, dest)
Create DynamoDB table image-ingest-records
Create SQS DLQ + main queue with SSE-KMS + redrive
Create source/dest S3 buckets with SSE-KMS
Configure source bucket notification -> SQS (with queue policy)
Create lambda IAM role with least-privilege policies
Write handler.py with URL-decoding + partial batch failures
Deploy lambda + create event source mapping
Smoke test: PUT object, verify dest + ddb + empty DLQ
Test space-in-key + partial batch failure

Create buckets with SSE-KMS default

shell

source env.sh && source keys.env && \
aws s3api create-bucket --bucket ingest-source-bucket >/dev/null && \
aws s3api create-bucket --bucket ingest-dest-bucket >/dev/null && \
SRC_ENC=$(python3 -c "import json; print(json.dumps({'Rules':[{'ApplyServerSideEncryptionByDefault':{'SSEAlgorithm':'aws:kms','KMSMasterKeyID':'alias/source-bucket-cmk'},'BucketKeyEnabled':True}]}))") && \
DST_ENC=$(python3 -c "import json; print(json.dumps({'Rules':[{'ApplyServerSideEncryptionByDefault':{'SSEAlgorithm':'aws:kms','KMSMasterKeyID':'alias/dest-bucket-cmk'},'BucketKeyEnabled':True}]}))") && \
aws s3api put-bucket-encryption --bucket ingest-source-bucket --server-side-encryption-configuration "$SRC_ENC" && \
aws s3api put-bucket-encryption --bucket ingest-dest-bucket --server-side-encryption-configuration "$DST_ENC" && \
echo "--- source ---" && aws s3api get-bucket-encryption --bucket ingest-source-bucket && \
echo "--- dest ---" && aws s3api get-bucket-encryption --bucket ingest-dest-bucket

output

--- source ---
{
    "ServerSideEncryptionConfiguration": {
        "Rules": [
            {
                "ApplyServerSideEncryptionByDefault": {
                    "SSEAlgorithm": "aws:kms",
                    "KMSMasterKeyID": "alias/source-bucket-cmk"
                },
                "BucketKeyEnabled": true
            }
        ]
    }
}
--- dest ---
{
    "ServerSideEncryptionConfiguration": {
        "Rules": [
            {
                "ApplyServerSideEncryptionByDefault": {
                    "SSEAlgorithm": "aws:kms",
                    "KMSMasterKeyID": "alias/dest-bucket-cmk"
                },
                "BucketKeyEnabled": true
            }
        ]
    }
}

[stdout]
--- source ---
{
    "ServerSideEncryptionConfiguration": {
        "Rules": [
            {
                "ApplyServerSideEncryptionByDefault": {
                    "SSEAlgorithm": "aws:kms",
                    "KMSMasterKeyID": "alias/source-bucket-cmk"
                },
                "BucketKeyEnabled": true
            }
        ]
    }
}
--- dest ---
{
    "ServerSideEncryptionConfiguration": {
        "Rules": [
            {
                "ApplyServerSideEncryptionByDefault": {
                    "SSEAlgorithm": "aws:kms",
                    "KMSMasterKeyID": "alias/dest-bucket-cmk"
                },
                "BucketKeyEnabled": true
            }
        ]
    }
}

Now wire the source bucket notification to SQS.

Configure S3 notification to SQS

shell

source env.sh && source queues.env && \
NC=$(python3 -c "import json; print(json.dumps({'QueueConfigurations':[{'Id':'ingest-notif','QueueArn':'$Q_ARN','Events':['s3:ObjectCreated:*']}]}))") && \
aws s3api put-bucket-notification-configuration --bucket ingest-source-bucket --notification-configuration "$NC" && \
aws s3api get-bucket-notification-configuration --bucket ingest-source-bucket

output

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

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

Create 3 KMS CMKs with aliases (source, sqs, dest)
Create DynamoDB table image-ingest-records
Create SQS DLQ + main queue with SSE-KMS + redrive
Create source/dest S3 buckets with SSE-KMS
Configure source bucket notification -> SQS (with queue policy)
Create lambda IAM role with least-privilege policies
Write handler.py with URL-decoding + partial batch failures
Deploy lambda + create event source mapping
Smoke test: PUT object, verify dest + ddb + empty DLQ
Test space-in-key + partial batch failure

Resolve KMS key ARNs

shell

source env.sh && source keys.env && \
SRC_KEY_ARN=$(aws kms describe-key --key-id "$SRC_KEY" --query 'KeyMetadata.Arn' --output text) && \
SQS_KEY_ARN=$(aws kms describe-key --key-id "$SQS_KEY" --query 'KeyMetadata.Arn' --output text) && \
DST_KEY_ARN=$(aws kms describe-key --key-id "$DST_KEY" --query 'KeyMetadata.Arn' --output text) && \
echo "SRC_KEY_ARN=$SRC_KEY_ARN" && echo "SQS_KEY_ARN=$SQS_KEY_ARN" && echo "DST_KEY_ARN=$DST_KEY_ARN" && \
echo "SRC_KEY_ARN=$SRC_KEY_ARN" >> keys.env && echo "SQS_KEY_ARN=$SQS_KEY_ARN" >> keys.env && echo "DST_KEY_ARN=$DST_KEY_ARN" >> keys.env

output

SRC_KEY_ARN=arn:aws:kms:us-east-1:000000000000:key/d96a6af1-8a26-45cd-b2ff-7daa04fdf5fb
SQS_KEY_ARN=arn:aws:kms:us-east-1:000000000000:key/e17db9db-0f42-4b14-9cfe-4a47f088ef89
DST_KEY_ARN=arn:aws:kms:us-east-1:000000000000:key/386438ac-69b0-4a36-a1a5-18dd00163f19

[stdout]
SRC_KEY_ARN=arn:aws:kms:us-east-1:000000000000:key/d96a6af1-8a26-45cd-b2ff-7daa04fdf5fb
SQS_KEY_ARN=arn:aws:kms:us-east-1:000000000000:key/e17db9db-0f42-4b14-9cfe-4a47f088ef89
DST_KEY_ARN=arn:aws:kms:us-east-1:000000000000:key/386438ac-69b0-4a36-a1a5-18dd00163f19

write · /app/build/trust.json

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

Write lambda IAM policy with key ARNs

shell

source env.sh && source keys.env && \
cat > lambda-policy.json <<EOF
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "Logs",
      "Effect": "Allow",
      "Action": [
        "logs:CreateLogGroup",
        "logs:CreateLogStream",
        "logs:PutLogEvents"
      ],
      "Resource": "arn:aws:logs:us-east-1:000000000000:*"
    },
    {
      "Sid": "ReadSourceObjects",
      "Effect": "Allow",
      "Action": ["s3:GetObject"],
      "Resource": "arn:aws:s3:::ingest-source-bucket/*"
    },
    {
      "Sid": "WriteDestObjects",
      "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": "WriteDdb",
      "Effect": "Allow",
      "Action": ["dynamodb:PutItem"],
      "Resource": "arn:aws:dynamodb:us-east-1:000000000000:table/image-ingest-records"
    },
    {
      "Sid": "KmsDecryptSourceBucket",
      "Effect": "Allow",
      "Action": ["kms:Decrypt"],
      "Resource": "$SRC_KEY_ARN"
    },
    {
      "Sid": "KmsConsumeQueue",
      "Effect": "Allow",
      "Action": ["kms:Decrypt", "kms:GenerateDataKey"],
      "Resource": "$SQS_KEY_ARN"
    },
    {
      "Sid": "KmsEncryptDestBucket",
      "Effect": "Allow",
      "Action": ["kms:Encrypt", "kms:GenerateDataKey"],
      "Resource": "$DST_KEY_ARN"
    }
  ]
}
EOF
cat lambda-policy.json | python3 -c 'import json,sys; json.load(sys.stdin); print("json ok")'

output

json ok

[stdout]
json ok

Create lambda role and inline policy

shell

source env.sh && \
aws iam create-role --role-name image-ingest-lambda-role --assume-role-policy-document file://trust.json --query 'Role.Arn' --output text && \
aws iam put-role-policy --role-name image-ingest-lambda-role --policy-name image-ingest-lambda-policy --policy-document file://lambda-policy.json && \
ROLE_ARN=$(aws iam get-role --role-name image-ingest-lambda-role --query 'Role.Arn' --output text) && \
echo "ROLE_ARN=$ROLE_ARN" > role.env && cat role.env

output

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

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

Create 3 KMS CMKs with aliases (source, sqs, dest)
Create DynamoDB table image-ingest-records
Create SQS DLQ + main queue with SSE-KMS + redrive
Create source/dest S3 buckets with SSE-KMS
Configure source bucket notification -> SQS (with queue policy)
Create lambda IAM role with least-privilege policies
Write handler.py with URL-decoding + partial batch failures
Deploy lambda + create event source mapping
Smoke test: PUT object, verify dest + ddb + empty DLQ
Test space-in-key + partial batch failure

write · /app/build/handler.py

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

import boto3

log = logging.getLogger()
log.setLevel(logging.INFO)

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

_endpoint = os.environ.get("AWS_ENDPOINT_URL") or None
s3 = boto3.client("s3", endpoint_url=_endpoint)
ddb = boto3.client("dynamodb", endpoint_url=_endpoint)


def _process_s3_record(s3_rec):
    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=bucket, Key=key)
    body = obj["Body"].read()

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

    ddb.put_item(
        TableName=DDB_TABLE,
        Item={
            "object_key": {"S": key},
            "source_size": {"N": str(len(body))},
            "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["messageId"]
        try:
            body = json.loads(record["body"])
            s3_records = body.get("Records") or []
            if not s3_records:
                raise ValueError("no s3 records in message body")
            for s3_rec in s3_records:
                _process_s3_record(s3_rec)
        except Exception as exc:
            log.exception("failed to process message %s: %s", message_id, exc)
            failures.append({"itemIdentifier": message_id})

    return {"batchItemFailures": failures}

Package lambda zip

shell

zip -q lambda.zip handler.py && ls -la lambda.zip && unzip -l lambda.zip

output

-rw-r--r-- 1 root root 966 Apr 22 09:23 lambda.zip
Archive:  lambda.zip
  Length      Date    Time    Name
---------  ---------- -----   ----
     1791  2026-04-22 09:23   handler.py
---------                     -------
     1791                     1 file

[stdout]
-rw-r--r-- 1 root root 966 Apr 22 09:23 lambda.zip
Archive:  lambda.zip
  Length      Date    Time    Name
---------  ---------- -----   ----
     1791  2026-04-22 09:23   handler.py
---------                     -------
     1791                     1 file

Deploy lambda

shell

source env.sh && source keys.env && source role.env && source queues.env && \
LAMBDA_ENV=$(python3 -c "
import json
print(json.dumps({'Variables':{
  'DEST_BUCKET':'ingest-dest-bucket',
  'DEST_KMS_KEY':'alias/dest-bucket-cmk',
  'DDB_TABLE':'image-ingest-records',
  'AWS_ENDPOINT_URL':'http://localstack:4566'
}}))") && \
aws lambda create-function \
  --function-name image-ingest-consumer \
  --runtime python3.11 \
  --handler handler.lambda_handler \
  --role "$ROLE_ARN" \
  --zip-file fileb://lambda.zip \
  --timeout 30 \
  --memory-size 256 \
  --environment "$LAMBDA_ENV" \
  --query 'FunctionArn' --output text && \
aws lambda wait function-active-v2 --function-name image-ingest-consumer && \
echo "lambda ready"

output

arn:aws:lambda:us-east-1:000000000000:function:image-ingest-consumer
lambda ready

[stdout]
arn:aws:lambda:us-east-1:000000000000:function:image-ingest-consumer
lambda ready

Create event source mapping with ReportBatchItemFailures

shell

source env.sh && source queues.env && \
aws lambda create-event-source-mapping \
  --function-name image-ingest-consumer \
  --event-source-arn "$Q_ARN" \
  --batch-size 10 \
  --function-response-types ReportBatchItemFailures \
  --query '{UUID:UUID,State:State,FRT:FunctionResponseTypes}' --output json

output

{
    "UUID": "d6d479ba-1fc0-45bf-aa4b-1ef05821fec8",
    "State": "Creating",
    "FRT": [
        "ReportBatchItemFailures"
    ]
}

[stdout]
{
    "UUID": "d6d479ba-1fc0-45bf-aa4b-1ef05821fec8",
    "State": "Creating",
    "FRT": [
        "ReportBatchItemFailures"
    ]
}

Wait for ESM enabled

shell

source env.sh && \
for i in 1 2 3 4 5; do
  S=$(aws lambda list-event-source-mappings --function-name image-ingest-consumer --query 'EventSourceMappings[0].State' --output text)
  echo "state: $S"
  [ "$S" = "Enabled" ] && break
  sleep 2
done

output

state: Enabled

[stdout]
state: Enabled

Create 3 KMS CMKs with aliases (source, sqs, dest)
Create DynamoDB table image-ingest-records
Create SQS DLQ + main queue with SSE-KMS + redrive
Create source/dest S3 buckets with SSE-KMS
Configure source bucket notification -> SQS (with queue policy)
Create lambda IAM role with least-privilege policies
Write handler.py with URL-decoding + partial batch failures
Deploy lambda + create event source mapping
Smoke test: PUT object, verify dest + ddb + empty DLQ
Test space-in-key + partial batch failure

Now smoke test.

Smoke test: put plain-key object

shell

source env.sh && source queues.env && \
echo "hello world" > /tmp/test1.txt && \
aws s3api put-object --bucket ingest-source-bucket --key "plain-key.txt" --body /tmp/test1.txt >/dev/null && \
echo "put done, waiting..." && \
for i in $(seq 1 30); do
  COUNT=$(aws s3api list-objects-v2 --bucket ingest-dest-bucket --prefix "processed/plain-key.txt" --query 'length(Contents || `[]`)' --output text)
  if [ "$COUNT" = "1" ]; then echo "dest has object after ${i}s"; break; fi
  sleep 2
done && \
aws s3api list-objects-v2 --bucket ingest-dest-bucket --query 'Contents[].Key' && \
echo "--- ddb ---" && \
aws dynamodb get-item --table-name image-ingest-records --key '{"object_key":{"S":"plain-key.txt"}}' && \
echo "--- dlq depth ---" && \
aws sqs get-queue-attributes --queue-url "$DLQ_URL" --attribute-names ApproximateNumberOfMessages

output

put done, waiting...
dest has object after 7s
[
    "processed/plain-key.txt"
]
--- ddb ---
{
    "Item": {
        "source_size": {
            "N": "12"
        },
        "processed_at": {
            "S": "2026-04-22T09:24:08.860886+00:00"
        },
        "object_key": {
            "S": "plain-key.txt"
        },
        "status": {
            "S": "OK"
        }
    }
}
--- dlq depth ---
{
    "Attributes": {
        "ApproximateNumberOfMessages": "0"
    }
}

[stdout]
put done, waiting...
dest has object after 7s
[
    "processed/plain-key.txt"
]
--- ddb ---
{
    "Item": {
        "source_size": {
            "N": "12"
        },
        "processed_at": {
            "S": "2026-04-22T09:24:08.860886+00:00"
        },
        "object_key": {
            "S": "plain-key.txt"
        },
        "status": {
            "S": "OK"
        }
    }
}
--- dlq depth ---
{
    "Attributes": {
        "ApproximateNumberOfMessages": "0"
    }
}

End-to-end works. Now test space-in-key.

Test key with spaces

shell

source env.sh && source queues.env && \
echo "spaces are fun" > /tmp/test2.txt && \
aws s3api put-object --bucket ingest-source-bucket --key "my cool file.txt" --body /tmp/test2.txt >/dev/null && \
echo "put done, waiting..." && \
for i in $(seq 1 30); do
  GOT=$(aws s3api head-object --bucket ingest-dest-bucket --key "processed/my cool file.txt" 2>/dev/null && echo OK)
  if [ -n "$GOT" ]; then echo "dest has object after ${i}s"; break; fi
  sleep 2
done && \
echo "--- dest list ---" && \
aws s3api list-objects-v2 --bucket ingest-dest-bucket --query 'Contents[].Key' && \
echo "--- ddb ---" && \
aws dynamodb get-item --table-name image-ingest-records --key '{"object_key":{"S":"my cool file.txt"}}' && \
echo "--- dlq depth ---" && \
aws sqs get-queue-attributes --queue-url "$DLQ_URL" --attribute-names ApproximateNumberOfMessages

output

put done, waiting...
dest has object after 5s
--- dest list ---
[
    "processed/my cool file.txt",
    "processed/plain-key.txt"
]
--- ddb ---
{
    "Item": {
        "source_size": {
            "N": "15"
        },
        "processed_at": {
            "S": "2026-04-22T09:24:25.806207+00:00"
        },
        "object_key": {
            "S": "my cool file.txt"
        },
        "status": {
            "S": "OK"
        }
    }
}
--- dlq depth ---
{
    "Attributes": {
        "ApproximateNumberOfMessages": "0"
    }
}

[stdout]
put done, waiting...
dest has object after 5s
--- dest list ---
[
    "processed/my cool file.txt",
    "processed/plain-key.txt"
]
--- ddb ---
{
    "Item": {
        "source_size": {
            "N": "15"
        },
        "processed_at": {
            "S": "2026-04-22T09:24:25.806207+00:00"
        },
        "object_key": {
            "S": "my cool file.txt"
        },
        "status": {
            "S": "OK"
        }
    }
}
--- dlq depth ---
{
    "Attributes": {
        "ApproximateNumberOfMessages": "0"
    }
}

Space-in-key works (URL decode is doing its job). Now test partial batch failure by invoking the lambda directly with a mixed batch.

write · /app/build/batch_event.py

import json

good_body = {
    "Records": [
        {
            "s3": {
                "bucket": {"name": "ingest-source-bucket"},
                "object": {"key": "plain-key.txt"},
            }
        }
    ]
}

bad_body = {
    "Records": [
        {
            "s3": {
                "bucket": {"name": "ingest-source-bucket"},
                "object": {"key": "does-not-exist-xyz.txt"},
            }
        }
    ]
}

event = {
    "Records": [
        {"messageId": "msg-good-1", "body": json.dumps(good_body)},
        {"messageId": "msg-bad-1", "body": json.dumps(bad_body)},
    ]
}

print(json.dumps(event))

Invoke lambda with mixed batch

shell

source env.sh && \
python3 batch_event.py > /tmp/batch-event.json && \
aws lambda invoke --function-name image-ingest-consumer --payload fileb:///tmp/batch-event.json --cli-binary-format raw-in-base64-out /tmp/batch-out.json && \
echo "--- response ---" && cat /tmp/batch-out.json

output

{
    "StatusCode": 200,
    "ExecutedVersion": "$LATEST"
}
--- response ---
{"batchItemFailures": [{"itemIdentifier": "msg-bad-1"}]}

[stdout]
{
    "StatusCode": 200,
    "ExecutedVersion": "$LATEST"
}
--- response ---
{"batchItemFailures": [{"itemIdentifier": "msg-bad-1"}]}

Only `msg-bad-1` comes back as a failure; `msg-good-1` is not retried. Final verification of the whole rig.

Final verification

shell

source env.sh && source queues.env && \
echo "=== event source mapping ===" && \
aws lambda list-event-source-mappings --function-name image-ingest-consumer --query 'EventSourceMappings[0].{State:State,ResponseTypes:FunctionResponseTypes,BatchSize:BatchSize}' && \
echo "=== main queue attrs ===" && \
aws sqs get-queue-attributes --queue-url "$Q_URL" --attribute-names KmsMasterKeyId VisibilityTimeout RedrivePolicy --query Attributes && \
echo "=== DLQ depth ===" && \
aws sqs get-queue-attributes --queue-url "$DLQ_URL" --attribute-names ApproximateNumberOfMessages KmsMasterKeyId --query Attributes && \
echo "=== source bucket enc ===" && \
aws s3api get-bucket-encryption --bucket ingest-source-bucket --query 'ServerSideEncryptionConfiguration.Rules[0].ApplyServerSideEncryptionByDefault' && \
echo "=== dest bucket enc ===" && \
aws s3api get-bucket-encryption --bucket ingest-dest-bucket --query 'ServerSideEncryptionConfiguration.Rules[0].ApplyServerSideEncryptionByDefault' && \
echo "=== KMS aliases ===" && \
aws kms list-aliases --query "Aliases[?AliasName=='alias/source-bucket-cmk' || AliasName=='alias/sqs-queue-cmk' || AliasName=='alias/dest-bucket-cmk'].AliasName"

output

=== event source mapping ===
{
    "State": "Enabled",
    "ResponseTypes": [
        "ReportBatchItemFailures"
    ],
    "BatchSize": 10
}
=== main queue attrs ===
{
    "KmsMasterKeyId": "alias/sqs-queue-cmk",
    "VisibilityTimeout": "180",
    "RedrivePolicy": "{\"deadLetterTargetArn\": \"arn:aws:sqs:us-east-1:000000000000:ingest-dlq\", \"maxReceiveCount\": 5}"
}
=== DLQ depth ===
{
    "ApproximateNumberOfMessages": "0",
    "KmsMasterKeyId": "alias/sqs-queue-cmk"
}
=== source bucket enc ===
{
    "SSEAlgorithm": "aws:kms",
    "KMSMasterKeyID": "alias/source-bucket-cmk"
}
=== dest bucket enc ===
{
    "SSEAlgorithm": "aws:kms",
    "KMSMasterKeyID": "alias/dest-bucket-cmk"
}
=== KMS aliases ===
[
    "alias/source-bucket-cmk",
    "alias/sqs-queue-cmk",
    "alias/dest-bucket-cmk"
]

[stdout]
=== event source mapping ===
{
    "State": "Enabled",
    "ResponseTypes": [
        "ReportBatchItemFailures"
    ],
    "BatchSize": 10
}
=== main queue attrs ===
{
    "KmsMasterKeyId": "alias/sqs-queue-cmk",
    "VisibilityTimeout": "180",
    "RedrivePolicy": "{\"deadLetterTargetArn\": \"arn:aws:sqs:us-east-1:000000000000:ingest-dlq\", \"maxReceiveCount\": 5}"
}
=== DLQ depth ===
{
    "ApproximateNumberOfMessages": "0",
    "KmsMasterKeyId": "alias/sqs-queue-cmk"
}
=== source bucket enc ===
{
    "SSEAlgorithm": "aws:kms",
    "KMSMasterKeyID": "alias/source-bucket-cmk"
}
=== dest bucket enc ===
{
    "SSEAlgorithm": "aws:kms",
    "KMSMasterKeyID": "alias/dest-bucket-cmk"
}
=== KMS aliases ===
[
    "alias/source-bucket-cmk",
    "alias/sqs-queue-cmk",
    "alias/dest-bucket-cmk"
]

Create 3 KMS CMKs with aliases (source, sqs, dest)
Create DynamoDB table image-ingest-records
Create SQS DLQ + main queue with SSE-KMS + redrive
Create source/dest S3 buckets with SSE-KMS
Configure source bucket notification -> SQS (with queue policy)
Create lambda IAM role with least-privilege policies
Write handler.py with URL-decoding + partial batch failures
Deploy lambda + create event source mapping
Smoke test: PUT object, verify dest + ddb + empty DLQ
Test space-in-key + partial batch failure

All up and green. **What's live:** - **KMS:** 3 CMKs with aliases `alias/source-bucket-cmk`, `alias/sqs-queue-cmk`, `alias/dest-bucket-cmk` , policies grant scoped actions per principal (S3 service + lambda role ARN), no resource wildcards outside the key itself. - **S3:** `ingest-source-bucket` + `ingest-dest-bucket` with `aws:kms` default encryption pointing at their respective aliases; source has an `ObjectCreated:*` notification to the main queue. - **SQS:** `ingest-events` (SSE-KMS via `alias/sqs-queue-cmk`, 180s visibility, redrive to DLQ w/ maxReceive=5) + `ingest-dlq` (also SSE-KMS). Queue resource policy restricts `SendMessage` to S3 with `SourceArn` = source bucket. - **DynamoDB:** `image-ingest-records`, pk `object_key` (S), PAY_PER_REQUEST. - **IAM:** `image-ingest-lambda-role` with per-resource policy , `s3:GetObject` on source only, `s3:PutObject` on `ingest-dest-bucket/processed/*`, SQS consume on main queue only, `dynamodb:PutItem` on the table, KMS actions scoped per-key (`Decrypt` on source key, `Decrypt`+`GenerateDataKey` on sqs key, `Encrypt`+`GenerateDataKey` on dest key), logs scoped to region/account. - **Lambda:** `image-ingest-consumer` (python3.11, 30s timeout, handler `handler.lambda_handler`) , URL-decodes keys via `urllib.parse.unquote_plus`, writes dest with explicit `ServerSideEncryption=aws:kms`, returns `{"batchItemFailures":[...]}` per failing `messageId`. Event source mapping has `FunctionResponseTypes=[ReportBatchItemFailures]`. **Verified:** - PUT `plain-key.txt` → `processed/plain-key.txt` + ddb row in ~7s, DLQ empty. - PUT `my cool file.txt` (space) → same result, DLQ empty. - Direct invoke with mixed batch returned `{"batchItemFailures":[{"itemIdentifier":"msg-bad-1"}]}` , good record not reported. Build artifacts are in `/app/build/` (`env.sh`, `keys.env`, `queues.env`, `role.env`, handler source, policies).

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/r5cae4Oe-K3f8nAR_sVTD/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 0xffff90334ec0>
kms = <botocore.client.KMS object at 0xffff8f55d220>

    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 (d96a6af1-8a26-45cd-b2ff-7daa04fdf5fb), got alias/source-bucket-cmk
E       assert 'd96a6af1-8a26-45cd-b2ff-7daa04fdf5fb' in 'alias/source-bucket-cmk'
E        +  where 'alias/source-bucket-cmk' = <built-in method get of dict object at 0xffff8f482ec0>('KMSMasterKeyID', '')
E        +    where <built-in method get of dict object at 0xffff8f482ec0> = {'KMSMasterKeyID': '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 0xffff8f4dcb00>
kms = <botocore.client.KMS object at 0xffff8f55d220>

    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 (e17db9db-0f42-4b14-9cfe-4a47f088ef89)
E       assert ('e17db9db-0f42-4b14-9cfe-4a47f088ef89' in 'alias/sqs-queue-cmk' or False)
E        +  where False = <built-in method endswith of str object at 0xffff8f35cef0>('e17db9db-0f42-4b14-9cfe-4a47f088ef89')
E        +    where <built-in method endswith of str object at 0xffff8f35cef0> = 'alias/sqs-queue-cmk'.endswith

/tests/test_outputs.py:199: AssertionError
=============================== warnings summary ===============================
test_outputs.py: 58 warnings
  /root/.cache/uv/archive-v0/r5cae4Oe-K3f8nAR_sVTD/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, 58 warnings in 12.07s ==================

Reproduce this trial: git checkout 2f94510 && PYTHONPATH=src python3 scripts/build_site.py , then open trial/trial_7305e845ac184501. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.

Trial trial_7305e845ac184501 · verifier authoritative; classifier explanatory.