etcd

Caddy is an extensible, cross-platform web server and server platform written in Go. It supports HTTP/1.1, HTTP/2, and HTTP/3, uses TLS by default, and can automatically obtain and manage certificates through ZeroSSL and Let's Encrypt for public names or a local CA for internal names and IP addresses. Caddy uses JSON as its native configuration format and exposes a JSON API for dynamic configuration; the Caddyfile and other adapters can convert alternative formats such as YAML, TOML, and NGINX configuration into JSON. Its modular architecture treats server capabilities as Go-based apps and modules, with standard HTTP and TLS apps, plugin support, and configuration changes that can be applied without restarting the server. It can be downloaded as a standalone executable, built from source, or customized with plugins through the xcaddy builder. The project is maintained in the caddyserver/caddy repository and provides documentation and support resources through its website and community forum.

ECC is an MIT-licensed open-source agent-harness performance system maintained by affaan-m. It packages reusable skills, specialized agents, project rules, commands, hooks, memory, and security tooling for Claude Code as its primary target, with supported or limited adapters for Codex, Cursor, OpenCode, Gemini, Zed, GitHub Copilot, and other coding harnesses. Its core workflow turns plan, test, implement, review, verify, remember, and improve into reusable agent workflows. Skills are loaded for tasks such as test-driven development, research, security review, end-to-end testing, documentation, and refactoring; agents isolate planning, implementation, and review; rules provide always-loaded project or language standards; and hooks run event-triggered checks and session automation outside the model context. The optional Memory Vault stores inspectable Markdown handoffs and session context, while AgentShield scans agent files, hooks, MCP configurations, permissions, prompts, and secrets for security risks. ECC can be installed from its repository or through the ecc@ecc Claude Code plugin and ecc-universal package. The repository also provides selective installers, native or project-local integrations for several harnesses, a desktop dashboard, and the optional ecc-agentshield security-auditing package. Feature parity varies by harness: GitHub Copilot receives instructions and reusable prompts but not ECC hooks or agent delegation, while Codex has a native marketplace plugin with a narrower hook model.

Tailcat is an open-source Go CLI and library from Tailscale that provides Netcat-style connections over Tailscale's encrypted data plane without using the Tailscale control plane or requiring a Tailscale account. A server generates a connection token containing WireGuard and relay metadata; a client uses the token to establish an end-to-end encrypted tunnel, initially through a DERP relay, while magicsock attempts NAT traversal and a direct peer-to-peer UDP connection. Its userspace networking stack does not alter routing tables, DNS settings, or require root access. The CLI can pipe standard input and output between machines, forward local TCP ports, provide an unauthenticated SSH server, run commands through a SOCKS5 proxy, act as an exit node, ping and inspect connection tokens, and publish tokens through DNS TXT records. The Go library exposes server and client APIs for dialing TCP ports through the tunnel. Tailcat can use Tailscale's public rate-limited DERP relays or user-operated relays, and an experimental WebAssembly browser demo supports file and text transfer. The project states that its CLI, API, and wire format have no stability guarantees.

Amazon Elastic Container Service (Amazon ECS) is a managed container orchestration service from Amazon Web Services for deploying, running, and scaling Docker-compatible containers, including Java microservices packaged as Docker containers. It supports AWS-hosted tasks and services through launch types including Amazon EC2 and AWS Fargate, and integrates with other AWS services such as IAM, Elastic Load Balancing, and CloudWatch.

celld is an open-source daemon from Deno that runs Cloudflare Workers and Durable Objects on self-hosted machines. Each Durable Object is a named cell with its own SQLite database; cells store long-term state in an S3-compatible, Google Cloud Storage, or Azure Blob Storage bucket. A celld node embeds V8 and executes Wrangler bundles. Nodes sharing a bucket form a fleet, using conditional bucket writes for cell ownership and signed peer HTTP for routing and replicated-log transport, without a membership protocol, failure detector, or consensus service. Committed SQLite writes are captured as LTX data; nodes persist that data locally and upload it to the bucket, while takeovers recover open logs from the previous owner before restoring a cell. celld can run locally with `celld dev` and a local object store, or as a container for Linux x86-64 and ARM64. Its installer provides a verifiable binary release, and deployed Worker projects require esbuild on the PATH.