theta: a humble approach to harness agnostic configuration
Theta is a Rust CLI tool designed for managing agent configurations based on the theta-spec. It functions similarly to a package manager, allowing users to create, validate, and cast configurations for various supported harnesses. The tool emphasizes a structured approach to configuration management, with a focus on documentation and community contributions.
- ▪Theta allows users to scaffold configurations and manage rules, tools, and skills through a command-line interface.
- ▪It supports various harnesses including Claude Code, Codex CLI, and GitHub Copilot.
- ▪The tool is built on the Rust programming language and encourages contributions from the community.
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Record
| Original publisher | GitHub |
| Canonical URL | https://github.com/tamarillo-ai/theta |
| Publication time | Wed, 27 May 2026 00:29:49 +0000 |
| Retrieval time | 2026-05-27T00:37:55.537Z |
| Last seen | 2026-05-27T00:37:55.537Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | T6FrkcD2c1rG |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
theta Rust CLI for managing agent configurations defined by theta-spec. Installation curl -sfL https://raw.githubusercontent.com/tamarillo-ai/theta/main/scripts/install.sh | bash Quick start theta init # scaffold theta.toml theta add rule python-types # add a rule theta add tool fetch --command "uvx mcp-server-fetch" # MCP tool (stdio) theta add tool context7 --command "npx -y @upstash/context7-mcp@latest" # another MCP tool theta add skill vercel-labs/agent-skills/skills/web-design-guidelines@main # skill from GitHub theta check # validate everything theta cast to claude-code # --> CLAUDE.md + .mcp.json + .claude/ What it does theta reads theta.toml and resolves, locks, materializes, and casts agent configurations to any supported harness by solving resources in a common .theta/ folder.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at GitHub.