Claude Skills by chrishuffman5

Expert skill for FastAPI web framework development. Covers ASGI/Starlette foundation, Pydantic v2 integration, dependency injection, path operations, automatic OpenAPI generation, async/await patterns, middleware, security (OAuth2, JWT), testing (TestClient, httpx), SQLAlchemy/SQLModel integration, and deployment. WHEN: \"FastAPI\", \"Starlette\", \"ASGI\", \"Pydantic\", \"Depends\", \"APIRouter\", \"path operation\", \"response_model\", \"OpenAPI auto-docs\", \"Swagger UI\", \"FastAPI middle...

Expert skill for Flask web framework development. Covers application factory, blueprints, routing, request/response handling, Jinja2 templates, application and request context (g, current_app), configuration, extensions ecosystem (SQLAlchemy, Login, WTF, CORS, Migrate), error handling, testing, and deployment. WHEN: \"Flask\", \"flask\", \"Werkzeug\", \"Jinja2\", \"Blueprint\", \"Flask blueprint\", \"flask factory\", \"create_app\", \"Flask-SQLAlchemy\", \"Flask-Login\", \"Flask-WTF\", \"Flas...

Expert skill for Go web development across net/http (Go 1.22+), Gin, Fiber, Chi, and Echo. Covers routing, middleware composition, context propagation, JSON binding, validation, error handling, database integration, testing, and deployment. WHEN: \"Go web\", \"Gin framework\", \"Fiber framework\", \"go-chi\", \"Echo framework\", \"net/http\", \"ServeMux\", \"gin.Context\", \"fiber.Ctx\", \"goroutine per request\", \"Go API\", \"Go REST\", \"Go middleware\", \"httptest\", \"Go handler\", \"Go ...

Expert skill for NestJS framework development. Covers modules, providers/DI, controllers, guards, interceptors, pipes, exception filters, request lifecycle, GraphQL integration, WebSockets, microservices, CQRS, scheduling, queues, caching, health checks, testing, and platform abstraction (Express/Fastify). WHEN: \"NestJS\", \"nest.js\", \"@nestjs\", \"NestModule\", \"@Module\", \"@Injectable\", \"@Controller\", \"@Guard\", \"@UseGuards\", \"@UseInterceptors\", \"@UsePipes\", \"@Catch\", \"Exc...

Top-level routing skill for ALL backend web framework and REST API technologies. Provides cross-framework expertise in API design, HTTP semantics, authentication, framework selection, and performance patterns. Use for framework selection, API design principles, and cross-framework comparisons. WHEN: \"backend framework\", \"REST API\", \"web API\", \"which framework\", \"Express vs FastAPI\", \"Django vs Rails\", \"Spring Boot vs\", \"API design\", \"backend architecture\", \"framework compar...

Expert skill for Ruby on Rails web development across Rails 7.2, 8.0, and 8.1. Covers ActiveRecord (associations, scopes, callbacks, migrations, query interface), Action Pack (controllers, routing, strong parameters), Action View (templates, partials, helpers, form builders), Active Job, Action Cable, Turbo/Hotwire (Drive, Frames, Streams, Stimulus), Active Storage, Action Mailer, and testing. WHEN: \"Rails\", \"Ruby on Rails\", \"ActiveRecord\", \"Active Record\", \"Action Pack\", \"Action V...

Expert skill for Rust web development with Axum and Actix Web. Covers Tower ecosystem, extractors, middleware, state management, Tokio runtime, Serde, error handling (thiserror, anyhow, IntoResponse), database integration (SQLx, Diesel, SeaORM), testing, and deployment. WHEN: \"Axum\", \"Actix Web\", \"Actix web\", \"actix-web\", \"Tower service\", \"Tower layer\", \"Rust web\", \"Rust API\", \"Rust REST\", \"Tokio runtime\", \"FromRequest\", \"FromRequestParts\", \"IntoResponse\", \"Response...

Expert skill for Spring Boot across all supported versions (3.x and 4.0). Provides deep expertise in IoC/DI, auto-configuration, Spring MVC, WebFlux, Spring Data, Spring Security, Actuator, configuration management, testing, and embedded servers. WHEN: \"Spring Boot\", \"Spring MVC\", \"WebFlux\", \"Spring Data\", \"Spring Security\", \"auto-configuration\", \"@SpringBootApplication\", \"Actuator\", \"Spring JPA\", \"Spring REST\", \"DispatcherServlet\", \"@RestController\", \"@ConfigurationP...

AWS CLI v2 command syntax and scripting: secure authentication (aws login, Identity Center SSO, assume-role profiles, instance/task roles), output formats, JMESPath queries, pagination, waiters, IAM operations, S3, Lambda, RDS, CloudFormation, ECS, EKS, CloudWatch, SSM, Route 53, STS, VPC networking. WHEN: \"aws \", \"AWS CLI\", \"aws configure\", \"aws sso\", \"aws login\", \"aws ec2\", \"aws s3\", \"aws lambda\", \"aws iam\", \"aws cloudformation\", \"aws ssm\", \"aws ecs\", \"aws eks\", \"...

Azure CLI (az) command syntax and scripting: authentication (interactive, service principal, managed identity, SSO), output formats and JMESPath queries, resource groups, VMs, storage accounts/blobs, networking (VNets, NSGs, load balancers, DNS), Entra ID, AKS, App Service, Functions, databases (SQL, Cosmos DB, MySQL, PostgreSQL), Key Vault, Monitor/alerting, and infrastructure scripting patterns. WHEN: \"az \", \"Azure CLI\", \"az login\", \"az vm\", \"az aks\", \"az storage\", \"az keyvault...

Bash 5.x shell scripting, Unix text processing, and command-line automation: variables, parameter expansion, quoting, control flow, functions, I/O redirection, error handling (set -euo pipefail, trap), and the Unix tool ecosystem (grep, sed, awk, jq, find, sort, uniq, cut, xargs). Covers process management, networking (curl, ssh, rsync, nc), file locking (flock), parallel execution, and production script patterns. WHEN: \"Bash\", \"bash\", \"shell\", \"sh\", \".sh\", \"shell script\", \"sed\"...

kubectl command-line usage and scripting: kubeconfig and context management, output formats (jsonpath, custom-columns, go-template), all major verbs (get, describe, apply, delete, exec, logs, port-forward, rollout, scale, drain), workload resources, config/storage, networking, RBAC, node management, debugging (CrashLoopBackOff, ImagePullBackOff, OOMKilled), and scripting patterns (dry-run, diff, wait, jq, kustomize). WHEN: \"kubectl\", \"k8s CLI\", \"kubeconfig\", \"namespace\", \"pod\", \"de...

Node.js as a scripting, CLI, automation, and file-processing tool across versions 20, 22, 24, and 26: file system operations, child_process/spawn, HTTP fetch with retry/pagination, JSON/CSV/YAML data processing, stream pipelines, argument parsing (parseArgs/commander/yargs), building CLI tools, output formatting (chalk/ora/cli-table3), shell integration (zx/execa), npm/npx workflow, and async concurrency patterns. WHEN: \"Node.js\", \"node\", \"npm\", \"npx\", \"nvm\", \"mjs\", \"cjs\", \"nod...

Cross-language CLI and scripting guidance for IT automation, system administration, and DevOps workflows: language selection (Bash vs PowerShell vs Python vs Node.js), pipes, exit codes, environment variables, argument parsing, error handling, and cross-platform scripting best practices. WHEN: \"which scripting language\", \"Bash vs PowerShell\", \"Bash vs Python\", \"CLI\", \"command line\", \"scripting\", \"shell script\", \"automation script\", \"cron\", \"task scheduler\", \"shell\", \"te...

PowerShell 7.4/7.6 LTS cross-platform scripting and automation: object-oriented pipelines, advanced functions with CmdletBinding, error handling (try/catch, ErrorActionPreference), module management (PSGallery, PSGet), remoting (WinRM, SSH), parallel execution (ForEach-Object -Parallel, ThreadJobs, Runspaces), and structured data processing (JSON, CSV, XML). Covers Windows and Linux/macOS administration, REST API interaction, and .NET interop. WHEN: \"PowerShell\", \"pwsh\", \"cmdlet\", \"pip...

Python 3.10-3.14 scripting and IT automation: file operations (pathlib, shutil, csv, json, yaml, toml), subprocess management, HTTP/API interaction (requests with retry/pagination), logging (basicConfig, handlers, JSON), argument parsing (argparse, click), regex, error handling patterns, system administration (psutil, platform), SSH (paramiko, fabric), email (smtplib), scheduling, and data processing (pandas). WHEN: \"Python\", \"python\", \"python script\", \"pip\", \"venv\", \"pathlib\", \"...

AWS platform architecture and strategy: service selection across compute, storage, database, networking, security, serverless, messaging, and analytics (EC2, S3, Lambda, RDS, Aurora, DynamoDB, EKS, ECS, VPC, IAM, CloudFront, SQS/SNS/EventBridge, Athena/Glue/Kinesis), plus multi-account governance, tagging strategy, DR and migration planning, with pricing context and trade-offs. Use when choosing between AWS services, designing a landing zone, sizing an AWS architecture, or optimizing AWS spen...

Microsoft Azure platform architecture and strategy: cost-aware service selection across compute (VMs, App Service, Functions, AKS, Container Apps), storage, databases (Azure SQL, Cosmos DB, Redis), networking, security posture, data platform (Data Factory, Synapse, Event Hubs, Service Bus), and cost optimization (Hybrid Benefit, Reserved Instances). Use when choosing between Azure services, sizing an Azure architecture, or optimizing Azure spend -- \"Azure\", \"App Service vs AKS\", \"Azure F...

Google Cloud Platform architecture and strategy: cost-aware service selection across compute (Compute Engine, Cloud Run, Cloud Functions, GKE, App Engine), storage, databases (BigQuery, Cloud SQL, AlloyDB, Spanner, Firestore, Bigtable), networking, security posture, AI/ML (Vertex AI, TPUs, BigQuery ML), and data platform (Pub/Sub, Dataflow, Dataproc). Use when choosing between GCP services, sizing a GCP architecture, or optimizing GCP spend -- \"GCP\", \"Compute Engine vs Cloud Run\", \"GKE A...

Strategic, vendor-neutral guidance across AWS, Azure, and GCP: cloud selection, multi-cloud strategy, cross-cloud service equivalence mapping, Well-Architected design principles, migration patterns (7 Rs), and FinOps cost management. Use when deciding which cloud to use, evaluating multi-cloud, mapping a service from one cloud to another, planning a cloud migration, or setting up cost governance -- \"cloud\", \"multi-cloud\", \"cloud migration\", \"FinOps\", \"Well-Architected\", \"which clou...

Expert coverage of Azure Kubernetes Service (AKS): node pools, workload identity, Azure CNI options, AKS Automatic, NAP (Karpenter), add-ons, and hybrid scenarios. Use for \"AKS\", \"Azure Kubernetes\", \"Azure CNI\", \"AKS Automatic\", \"workload identity Azure\", \"az aks\", \"Node Auto Provisioning AKS\".

Expert coverage of Consul Connect service mesh: Consul Dataplane, intentions, ServiceRouter, ServiceSplitter, mesh gateways, multi-datacenter federation, transparent proxy, and hybrid platform support (Kubernetes + VMs). Use for \"Consul Connect\", \"Consul mesh\", \"intentions\", \"ServiceRouter\", \"Consul Dataplane\", \"mesh gateway\", \"Consul service mesh\", \"Consul on Kubernetes\". Do NOT use for HashiCorp Vault secrets management, dynamic secrets, or PKI/certificate issuance -- that's...

Expert coverage of containerd across all supported versions: CRI implementation, snapshotter architecture, content store, namespaces, NRI plugin framework, Sandbox API, nerdctl CLI, and Kubernetes integration. Use for \"containerd\", \"nerdctl\", \"CRI\", \"snapshotter\", \"NRI\", \"Sandbox API\", \"containerd config\", \"ctr\", \"crictl\", \"containerd 2\".

Expert coverage of Docker Engine across all supported versions: dockerd/containerd/runc architecture, BuildKit builds, Dockerfile optimization, Compose v2, networking, storage drivers, security hardening, and Docker Scout. Use for \"Docker\", \"Dockerfile\", \"docker-compose\", \"Docker Compose\", \"BuildKit\", \"docker build\", \"docker run\", \"dockerd\", \"Docker Desktop\", \"Docker Scout\".

Expert coverage of Amazon Elastic Kubernetes Service (EKS): managed control plane, Karpenter, Fargate, IRSA, Pod Identity, VPC CNI, EKS add-ons, EKS Anywhere, and Auto Mode. Use for \"EKS\", \"Amazon EKS\", \"Karpenter\", \"Fargate\", \"IRSA\", \"VPC CNI\", \"EKS Auto Mode\", \"EKS Anywhere\", \"eksctl\".

Expert coverage of Google Kubernetes Engine (GKE): Autopilot, Standard mode, Config Sync, Policy Controller, GKE Enterprise, multi-cluster, and Node Auto Provisioning. Use for \"GKE\", \"Google Kubernetes Engine\", \"GKE Autopilot\", \"Config Sync\", \"Policy Controller\", \"GKE Enterprise\", \"Autopilot mode\".

Expert coverage of the Helm package manager (Helm 3 and Helm 4): chart development, Go templates, values, hooks, OCI registries, SSA, Helmfile, helm-secrets, and dependency management. Use for \"Helm\", \"Helm chart\", \"helm install\", \"helm template\", \"Helmfile\", \"helm-secrets\", \"Chart.yaml\", \"values.yaml\", \"OCI registry\". Do NOT use for GitOps continuous-delivery of Helm releases (auto-sync, drift detection, app-of-apps) -- that's the `argocd` or `flux` skill (in the `devops` p...

Expert coverage of Istio service mesh across all supported versions: ambient mesh (ztunnel/waypoint), sidecar mode, istiod control plane, Envoy data plane, VirtualService, DestinationRule, security policies, observability, and Kubernetes Gateway API. Use for \"Istio\", \"istiod\", \"VirtualService\", \"DestinationRule\", \"ambient mesh\", \"ztunnel\", \"waypoint\", \"Envoy sidecar\", \"Istio Gateway\", \"PeerAuthentication\".

Expert coverage of Kubernetes across all versions: control plane architecture, workload resources, scheduling, networking, storage, RBAC, autoscaling, and troubleshooting. Use for \"Kubernetes\", \"kubectl\", \"pod\", \"deployment\", \"service\", \"StatefulSet\", \"DaemonSet\", \"kube-apiserver\", \"etcd\", \"kubelet\". Do NOT use for GitOps continuous-delivery of manifests (ArgoCD sync waves, Flux reconciliation, app-of-apps) -- that's the `argocd` or `flux` skill (in the `devops` plugin).

Expert coverage of Linkerd service mesh across all supported versions: linkerd2-proxy (Rust), zero-config mTLS, ServiceProfile, multi-cluster gateway mirroring, post-quantum cryptography, and minimal operational overhead. Use for \"Linkerd\", \"linkerd2-proxy\", \"Linkerd viz\", \"ServiceProfile\", \"Linkerd multi-cluster\", \"Linkerd mTLS\", \"post-quantum mesh\", \"Linkerd install\", \"TrafficSplit\".

Expert coverage of Red Hat OpenShift Container Platform and OKD: OCP architecture, Operators/OLM, Routes, Security Context Constraints, BuildConfigs, ImageStreams, and Machine Config Operator. Use for \"OpenShift\", \"OCP\", \"OKD\", \"oc command\", \"Routes OpenShift\", \"SCC\", \"BuildConfig\", \"ImageStream\", \"OLM\", \"OperatorHub\".

Compares container orchestration platforms -- Kubernetes, managed Kubernetes (EKS, AKS, GKE), OpenShift, Rancher, and Helm -- to help pick or evaluate a platform. Use for \"orchestration\", \"Kubernetes vs\", \"which orchestrator\", \"managed Kubernetes\", \"container platform\", \"EKS or AKS or GKE\", \"cluster management\", \"orchestration comparison\", \"pick a platform\", \"container scheduling\". Do NOT use for implementation questions about a specific platform -- use the `kubernetes`, `...

Top-level entry point for all container and orchestration technologies -- containerization, Kubernetes, service mesh, container security, and cloud-native architecture -- for cross-platform or architectural questions. Use for \"container\", \"Docker\", \"Kubernetes\", \"K8s\", \"pod\", \"Helm chart\", \"container orchestration\", \"service mesh\", \"Istio\", \"container image\", \"Dockerfile\", \"kubectl\", \"deployment\", \"statefulset\" when no specific technology is named or the question s...

Expert coverage of Podman across all supported versions: daemonless architecture, rootless containers, Quadlet systemd integration, pods, podman machine, Netavark networking, crun runtime, and Docker migration. Use when the question is about Podman itself (any OS) -- \"Podman\", \"podman-compose\", \"Quadlet\", \"rootless\", \"daemonless\", \"conmon\", \"Netavark\", \"podman machine\", \"podman generate kube\", \"podman kube play\". Do NOT use for RHEL-specific Podman packaging, SELinux integ...

Expert coverage of SUSE Rancher multi-cluster Kubernetes management: RKE2, K3s, Fleet GitOps, Harvester HCI, multi-cluster RBAC, and Provisioning v2. Use for \"Rancher\", \"RKE2\", \"K3s\", \"Fleet GitOps\", \"Harvester\", \"multi-cluster management\", \"cattle.io\", \"SUSE Kubernetes\".

Compares container runtimes -- Docker, Podman, and containerd -- to help select the right runtime for a use case. Use for \"container runtime\", \"Docker vs Podman\", \"which runtime\", \"containerd vs Docker\", \"OCI runtime\", \"daemonless\", \"rootless containers\", \"container engine\", \"runtime comparison\", \"crun vs runc\". Do NOT use for implementation questions about a specific runtime -- use the `docker`, `podman`, or `containerd` skill.

Compares service mesh technologies -- Istio, Linkerd, and Consul Connect -- and helps decide whether a mesh is needed at all. Use for \"service mesh\", \"Istio vs Linkerd\", \"which service mesh\", \"do I need a service mesh\", \"sidecar proxy\", \"ambient mesh\", \"mTLS\", \"service-to-service\", \"mesh comparison\", \"zero trust networking\". Do NOT use for implementation questions about a specific mesh -- use the `istio`, `linkerd`, or `consul` skill.

Google BigQuery expert. Deep expertise in columnar storage, slot-based execution, partitioning, clustering, BigQuery ML, BigQuery BI Engine, streaming, and cost optimization. WHEN: \"BigQuery\", \"bq command\", \"BigQuery ML\", \"BQML\", \"BigQuery Storage\", \"BigQuery slots\", \"BigQuery editions\", \"INFORMATION_SCHEMA BigQuery\", \"BigQuery Omni\", \"BigLake\", \"BigQuery Studio\".

Apache Cassandra technology expert covering ALL versions. Deep expertise in distributed architecture, CQL, data modeling, compaction, repair, cluster operations, and performance tuning. WHEN: \"Cassandra\", \"CQL\", \"cqlsh\", \"nodetool\", \"SSTable\", \"compaction\", \"repair\", \"gossip\", \"vnodes\", \"consistency level\", \"partition key\", \"clustering key\", \"tombstone\", \"hint\", \"read repair\", \"anti-entropy\", \"cassandra.yaml\".

ClickHouse technology expert covering ALL versions. Deep expertise in columnar storage, MergeTree engine family, materialized views, distributed queries, and analytical query optimization. WHEN: \"ClickHouse\", \"clickhouse-client\", \"clickhouse-server\", \"MergeTree\", \"ReplacingMergeTree\", \"AggregatingMergeTree\", \"CollapsingMergeTree\", \"materialized view\", \"distributed table\", \"ClickHouse Cloud\", \"clickhouse-local\", \"ClickHouse Keeper\".

Azure Cosmos DB expert. Deep expertise in multi-model APIs (NoSQL, MongoDB, Cassandra, Gremlin, Table), partitioning, consistency levels, RU optimization, global distribution, and operational tuning. WHEN: \"Cosmos DB\", \"CosmosDB\", \"Cosmos\", \"Request Units\", \"RU/s\", \"partition key Cosmos\", \"consistency level\", \"global distribution\", \"multi-region writes\", \"Cosmos DB NoSQL\", \"Cosmos DB MongoDB\", \"change feed\", \"Cosmos DB serverless\".

Couchbase technology expert covering ALL versions. Deep expertise in N1QL, key-value operations, Full Text Search, Eventing, Analytics, XDCR, cluster management, and performance tuning. WHEN: \"Couchbase\", \"N1QL\", \"couchbase-cli\", \"cbq\", \"cbstats\", \"XDCR\", \"Couchbase Eventing\", \"Couchbase Analytics\", \"vBucket\", \"Couchbase Mobile\", \"Sync Gateway\", \"Couchbase Capella\".

Databricks expert. Deep expertise in lakehouse architecture, Delta Lake, Unity Catalog, Spark SQL, MLflow, Mosaic AI, workflows, and cost optimization. WHEN: \"Databricks\", \"Delta Lake\", \"Unity Catalog\", \"Databricks SQL\", \"Databricks workspace\", \"DBU\", \"Photon\", \"MLflow\", \"Mosaic AI\", \"Delta Sharing\", \"Databricks Workflows\", \"Databricks cluster\", \"serverless compute\", \"Liquid Clustering\".

Apache Druid technology expert. Deep expertise in real-time analytics, columnar ingestion, segment management, query types, multi-stage query engine, and cluster operations. WHEN: \"Druid\", \"Apache Druid\", \"druid.io\", \"Druid SQL\", \"segment\", \"datasource\", \"ingestion spec\", \"Druid Coordinator\", \"Druid Broker\", \"Druid Historical\", \"Druid Overlord\", \"Druid Router\", \"rollup\", \"Druid MSQ\".

DuckDB as a database engine: internals, SQL dialect, storage/indexing, extension system, the Quack remote/client-server protocol, and query optimization/tuning. Use for \"DuckDB\", \"duckdb CLI\", \"embedded OLAP\", \"DuckDB extension\", \"httpfs\", \"spatial\", \"duckdb_fdw\", \"DuckDB WASM\", \"Friendly SQL\", \"DuckDB pivot\", \"duckdb-wasm\", \"DuckDB Quack\", \"quack_serve\", \"DuckDB remote protocol\", \"DuckDB client-server\", \"DuckDB performance tuning\". Do NOT use for DuckDB as an ...

Amazon DynamoDB expert. Deep expertise in single-table design, GSI/LSI strategies, capacity planning, DynamoDB Streams, DAX caching, PartiQL, transactions, and operational tuning. WHEN: \"DynamoDB\", \"dynamo\", \"single-table design\", \"GSI\", \"LSI\", \"partition key\", \"sort key\", \"DynamoDB Streams\", \"DAX\", \"PartiQL\", \"on-demand capacity\", \"provisioned capacity\", \"DynamoDB TTL\", \"DynamoDB transactions\", \"aws dynamodb\".

Amazon ElastiCache and MemoryDB expert. Deep expertise in managed Redis/Valkey/Memcached, cluster mode, replication, failover, and caching strategies. WHEN: \"ElastiCache\", \"MemoryDB\", \"ElastiCache Redis\", \"ElastiCache Memcached\", \"ElastiCache Valkey\", \"ElastiCache Serverless\", \"cache node\", \"replication group\", \"ElastiCache cluster mode\", \"ElastiCache Global Datastore\".

Elasticsearch as a general-purpose search/database engine covering ALL versions: full-text search, index management, cluster operations, Query DSL, aggregations, mappings, and operational tuning for application data. Use for \"Elasticsearch\", \"elastic\", \"index management\", \"Query DSL\", \"mapping\", \"analyzer\", \"shard\", \"replica\", \"cluster health\", \"_cat API\", \"bulk API\", \"ingest pipeline\", \"ILM\", \"snapshot\", \"cross-cluster\". Do NOT use for Elasticsearch/ELK as an ob...

InfluxDB technology expert covering ALL versions. Deep expertise in time-series data modeling, Flux/SQL/InfluxQL query languages, retention policies, continuous queries, Telegraf integration, and operational tuning. WHEN: \"InfluxDB\", \"influx CLI\", \"Flux\", \"InfluxQL\", \"Telegraf\", \"line protocol\", \"retention policy\", \"continuous query\", \"downsampling\", \"TSM\", \"IOx\", \"InfluxDB Cloud\", \"bucket\", \"measurement\", \"tag\", \"field\".

MariaDB technology expert covering ALL versions. Deep expertise in InnoDB, Aria, ColumnStore, Galera Cluster, MaxScale, replication, query optimization, and operational tuning. WHEN: \"MariaDB\", \"Galera\", \"MaxScale\", \"ColumnStore\", \"Aria engine\", \"mariadb-dump\", \"MariaDB replication\", \"mariadb-backup\", \"Spider engine\", \"WSREP\", \"Galera cluster\", \"mariadb.cnf\", \"mariadb-secure-installation\", \"system versioning\", \"MariaDB thread pool\".