Common Expression Language (CEL)

Connector Evals is a framework for comparing connector performance across native command-line interfaces, raw MCP, and mcpc. It evaluates these approaches using task-completion time and token cost.

SimpleEnglish is an open-source agent skill that makes large language models write technical documentation in ASD-STE100 Simplified Technical English, a controlled language used in aerospace. Its rules enforce short sentences, active voice, explicit instructions, simple tenses, and consistent terminology when rewriting READMEs, error messages, incident reports, runbooks, and release notes. The skill is distributed as a dependency-free folder for tools that support the Agent Skills standard, including Claude Code, Cursor, VS Code Copilot, OpenAI Codex, Gemini CLI, Goose, and OpenCode. It can also be installed as a Claude Code plugin and output style, or used by adding its prompt to a system prompt, AGENTS.md, or .cursorrules file. The repository is licensed under MIT.

BAML is a language and runtime for defining structured model interfaces and connecting agents to application code. It can repair malformed JSON outputs and was used with GPT OSS120B to find comments mentioning sponsors.

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.

LikeC4 is an open-source modeling language and toolset for describing software architecture as code and generating live, browsable diagrams from the model. It is inspired by the C4 Model and Structurizr DSL, while allowing users to define custom notation, element types, and nested architecture levels. The project provides a CLI for previewing diagrams, along with a VS Code extension and other tools for working with the models. LikeC4 is distributed under the MIT License.