How Starlight works
Your agent is the runtime. Starlight's public layer reads and plans; it never acts on your accounts.
starlightintelligence.ai/app/mcp/, Starlight-Intelligence-System/AGENTS.md, TRUTH.mdMost AI products run the model for you behind a hosted key wall. Starlight works the other way around: your own coding agent does the work, on your machine, with your keys. Starlight supplies the verified context that agent reads and the methods it follows.
Three layers
| Layer | What it is | Who runs it |
|---|---|---|
| Your agent | Claude Code, Codex, Gemini CLI, Antigravity, Grok, or another harness with your credentials and permissions | You |
| Public interfaces | The MCP endpoints and HTTP API: catalogues, install plans, Atlas research, and verified docs | Starlight, read-only |
| Methods & skills | Skills and bounded loops such as the build-fix loop that execute inside your agent | Your agent, under your rules |
The authority boundary
Every public tool is marked read-only, non-destructive, and idempotent. None of them can publish, purchase, read your credentials, or mutate an external system. When a tool returns a plan, the plan is structured data: nothing happens until you or your agent choose to execute it.
Why it is built this way: Because Starlight never holds your keys, a mistake on our side cannot spend your money or touch your repositories. You keep every irreversible decision, and you can inspect every plan before it runs.
How to read a capability badge
| Label | Meaning |
|---|---|
| Live | You can use it now from this site, the public MCP endpoint, or the named repository. |
| Plans only | It returns a deterministic plan or proposal and changes nothing. |
| Preview | It runs in our repositories and has test evidence, but is not yet packaged for public one-line install. |
| Not available | It does not exist yet. No date, price, or terms are claimed. |
Each page also states when its facts were last checked and which source files were inspected. If a page and the code ever disagree, the code wins and the page is a bug: open an issue on GitHub.
Connect your agent to Starlight
Add the public Starlight MCP endpoint to Claude Code, Codex, Gemini CLI, or Grok, then run your first tool call.
Work from any harness
The headless command and MCP connect command for Claude Code, Codex, Gemini CLI, Antigravity, Grok, and OpenCode, checked against each tool.