Files
Skald-Circle/crates/mcp-client/src/config.rs
T
dguiducci 6d299472e3 feat(mcp): Connectors — catalog + global vs per-user runtimes (§7/§14/§15)
Re-architects MCP from one owner table + agent-written registration into an
admin-curated catalog with two runtimes unioned per session, surfaced in the UI
as "Connectors" (mcp/schema stays neutral, §0.1).

Two runtimes behind one seam (§7):
- Global runtime: shared, stateless connectors (web-search, Tavily…) on the
  HOST, connected at boot from mcp_global_servers, access-filtered per user via
  mcp_global_access.
- Per-user runtime: a user's activated connectors run INSIDE their container,
  started at first login from mcp_user_servers and living until restart (§9);
  docker exec -i children die via kill_on_drop when the UserContext drops.
- McpProvider trait (mcp/provider.rs): the session round-loop never learns which
  runtime owns a server. McpManager implements it directly (inert ownerless
  bundle); UserMcpView implements global ∪ user with an accessible_global
  snapshot. Both share McpManager::connect_all; McpServerSpec +
  global_row_spec/user_row_spec turn a DB row into a connectable spec.
- mcp-client: McpServerConfig.launch_in runs a stdio command inside a container
  via docker exec -i (set at runtime, never parsed from config).

Authorization is a capability on the role, not `if role==admin` (§0.1/§14):
role_capabilities table + db/role_capabilities.rs — register_remote and
register_local_from_catalog are self-service (seeded on every new role), while
register_local_script and manage_catalog are admin-only. admin holds every
capability by construction. This removes the agent-facing register_mcp/delete_mcp
tools and the mcp kinds of list_items/toggle_item, closing the §14 RCE vector.

Schema:
- Registry: mcp_catalog (vetted templates — schema only, no live creds),
  mcp_global_servers + mcp_global_access, role_capabilities.
- Owner: mcp_user_servers (per-user activations; api_key encrypted at rest,
  catalog_name a bare TEXT snapshot, never an owner→registry FK).
- Drops the old owner table mcp_servers.

API + UI: src/frontend/api/mcp.rs (admin catalog/global/access + user
available/activate/activated, all capability-gated via require_cap);
web/components/connectors.js (<connectors-page>) renders the user view always
and the admin view for role_id === 'admin'.

Deferred: interactive per-user auth (OAuth callback / QR / SSH elicitation, §15)
— only none/api_key wired; no boot seed of catalog presets; per-(user, session)
MCP grant model still open.
2026-07-16 16:44:12 +01:00

35 lines
1.2 KiB
Rust

use std::collections::HashMap;
use serde::Deserialize;
#[derive(Debug, Deserialize, Clone)]
pub struct McpServerConfig {
pub name: String,
pub transport: McpTransport,
/// stdio only: the executable to spawn.
pub command: Option<String>,
/// stdio only: arguments passed to the command.
pub args: Option<Vec<String>>,
/// stdio only: extra environment variables (values support `${VAR}` interpolation).
pub env: Option<HashMap<String, String>>,
/// http only: base URL of the MCP server.
pub url: Option<String>,
/// http only: API key sent as `Authorization: Bearer <key>` (supports `${VAR}` interpolation).
pub api_key: Option<String>,
/// stdio only: when `Some(container)`, the command runs INSIDE that Docker
/// container via `docker exec -i` instead of on the host. Set at runtime by
/// the manager (per-user connectors, blueprint §7), never parsed from config.
#[serde(skip)]
pub launch_in: Option<String>,
}
#[derive(Debug, Deserialize, Clone)]
#[serde(rename_all = "snake_case")]
pub enum McpTransport {
Stdio,
/// Streamable HTTP (remote MCP servers — previously called SSE).
Http,
/// Alias kept for backwards compatibility.
Sse,
}