Merge PR #451: feat: Add Daytona environment backend

Authored by rovle. Adds Daytona as the sixth terminal execution backend
with cloud sandboxes, persistent workspaces, and full CLI/gateway integration.
Includes 24 unit tests and 8 integration tests.

website/docs/developer-guide/architecture.md

@@ -55,7 +55,7 @@ hermes-agent/
 │   ├── skill_manager_tool.py      # Skill management
 │   └── environments/             # Terminal execution backends
 │       ├── base.py                   # BaseEnvironment ABC
-│       ├── local.py, docker.py, ssh.py, singularity.py, modal.py
+│       ├── local.py, docker.py, ssh.py, singularity.py, modal.py, daytona.py
 │
 ├── gateway/                  # Messaging gateway
 │   ├── run.py                    # GatewayRunner — platform lifecycle, message routing

website/docs/index.md

@@ -42,7 +42,7 @@ It's not a coding copilot tethered to an IDE or a chatbot wrapper around a singl
 - **Grows the longer it runs** — Persistent memory and self-created skills
 - **Scheduled automations** — Built-in cron with delivery to any platform
 - **Delegates & parallelizes** — Spawn isolated subagents for parallel workstreams
-- **Real sandboxing** — 5 terminal backends: local, Docker, SSH, Singularity, Modal
+- **Real sandboxing** — 6 terminal backends: local, Docker, SSH, Singularity, Modal, Daytona
 - **Full web control** — Search, extract, browse, vision, image generation, TTS
 - **MCP support** — Connect to any MCP server for extended tool capabilities
 - **Research-ready** — Batch processing, trajectory export, RL training integration

website/docs/reference/environment-variables.md

@@ -49,7 +49,7 @@ All variables go in `~/.hermes/.env`. You can also set them with `hermes config
 
 | Variable | Description |
 |----------|-------------|
-| `TERMINAL_ENV` | Backend: `local`, `docker`, `ssh`, `singularity`, `modal` |
+| `TERMINAL_ENV` | Backend: `local`, `docker`, `ssh`, `singularity`, `modal`, `daytona` |
 | `TERMINAL_DOCKER_IMAGE` | Docker image (default: `python:3.11`) |
 | `TERMINAL_DOCKER_VOLUMES` | Additional Docker volume mounts (comma-separated `host:container` pairs) |
 | `TERMINAL_SINGULARITY_IMAGE` | Singularity image or `.sif` path |

website/docs/user-guide/configuration.md

@@ -133,7 +133,7 @@ Configure which environment the agent uses for terminal commands:
 
 ```yaml
 terminal:
-  backend: local    # or: docker, ssh, singularity, modal
+  backend: local    # or: docker, ssh, singularity, modal, daytona
   cwd: "."          # Working directory ("." = current dir)
   timeout: 180      # Command timeout in seconds
 ```

website/docs/user-guide/features/tools.md

@@ -62,7 +62,7 @@ The terminal tool can execute commands in different environments:
 ```yaml
 # In ~/.hermes/config.yaml
 terminal:
-  backend: local    # or: docker, ssh, singularity, modal
+  backend: local    # or: docker, ssh, singularity, modal, daytona
   cwd: "."          # Working directory
   timeout: 180      # Command timeout in seconds
 ```