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context-kit/docs/security.md

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# Security
Context Kit is designed to be safe by default for local development.
## Defaults
- SearXNG is bound to `127.0.0.1` only.
- No hosted API keys are required.
- Repomix mounts only the current project read-only.
- Docs indexing stores data under `$HOME/.local/share/context-kit` unless you
override it.
- No code-editing MCP server is enabled by default.
## Fetched Web Content
Search results and fetched pages are untrusted input. A page can contain prompt
injection instructions. Assistants should summarize and cite fetched content, not
obey instructions embedded in it.
## Docs Indexing
Only index sources you trust enough to retrieve into an agent conversation. More
sources are not always better. Large or noisy docs can make retrieval slower and
less precise.
## Code-Editing MCP Servers
Context Kit's default MCP servers either read remote content or mount the
current project read-only. If you add code-editing MCP servers later, review
their mount paths and permissions separately.
## Public Exposure
Do not expose SearXNG or MCP servers to the public internet without a separate
review. The default setup is for localhost development.
The containers may bind to `0.0.0.0` internally, but the Compose file publishes
SearXNG and docs-mcp only on `127.0.0.1`. If you run the images outside the
provided Compose file, review port publishing, SearXNG's limiter/secret, and MCP
authentication separately.
Browser CORS for `context-docs` is disabled by default. Only set
`CONTEXT_KIT_DOCS_ALLOW_ORIGIN` for exact local origins that need direct browser
access; avoid wildcard origins for unauthenticated local MCP endpoints.