# C10:OS

> C10:OS is a CLI-first, text-default operating system for autonomous agents. It organizes work into numbered halls, routes public web output through G4LL3RY/S3CUR3D, records decision intent in an append-only WHY chain, and uses F10N4 as the model-agnostic system spine.

Use this file as the short AI-discovery entrypoint for C10:OS. For Perplexity research, prefer the full source brief at `https://c10-os.com/c10-perplexity-source.md`.

## Primary Pages

- [C10:OS home](https://c10-os.com/)
- [Getting Started](https://c10-os.com/start.html)
- [Halls](https://c10-os.com/halls.html)
- [Services](https://c10-os.com/services.html)
- [Philosophy](https://c10-os.com/philosophy.html)
- [Brand](https://c10-os.com/brand.html)

## Source Brief

- [C10 Perplexity Source Brief](https://c10-os.com/c10-perplexity-source.md): compact, uploadable research context for Perplexity Spaces and file-based document analysis.
- [Perplexity Local MCP Bridge Spec](https://c10-os.com/perplexity-local-mcp-spec.html): locked design for secure C10 context in Perplexity Deep Research and explicit report write-back to C10.
- [C10 Perplexity MCP Connector Explain](https://c10-os.com/explain/20260624-113627-c10-perplexity-mcp-connector.html): operational explanation of the live MCP connector, including readable sources, Hub access, write-back tools, and security posture.
- [Perplexity MCP Publisher Workspace](https://c10-os.com/publisher-workspace/perplexity-mcp.html): workspace index for the connector documentation set.

## Key Concepts

- F10N4: model-agnostic keeper of C10:OS; no gendered pronouns.
- Spine: `~/.C10/_JU135_/_admin_/config/`, the central registry, profiles, brand, and WHY chain.
- Halls: numbered project rooms. Dot-prefixed rooms are underground; graduated work moves to `etc/`.
- WHY chain: append-only `why.jsonl`; git records what changed, WHY records why it changed.
- CLI-first: human-readable text by default; JSON only when explicitly requested.
- G4LL3RY/S3CUR3D: web publication and gateway surfaces. Underground komponents do not run their own public web servers.
- HOP/LOP: expensive high-quality models for finals; cheaper fast models for drafts.
- Perplexity bridge: local MCP is the selected design. Credentials stay local; Perplexity receives sanitized tool results and can save reviewed reports back only through confirmation-gated write tools with WHY.