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Wave 4 of transparent SSH support (3 parallel owner-agents on disjoint packages).
- transport-http: computer routes — GET /computers, GET /computers/:alias,
GET /computers/:alias/status, POST /computers/:alias/test (all delegate to a
new ComputerService seam, graceful []/disconnected when ssh not loaded);
GET/PUT/DELETE /conversations/:id/computer; PUT /workspaces/:id/default-computer
(mirror the cwd/default-cwd routes); /chat threads computerId into the
orchestrator. Defines ComputerService interface + computerServiceHandle
(defineService<ComputerService>('ssh')) in seam.ts — the seam the ssh package
provides via host.provideService in wave 5.
- transport-ws: chat.send + chat.queue thread computerId onto the route result
(mirrors cwd/workspaceId), forwarded to the orchestrator input.
- mcp: CR-1 fix — filterMcpTools now preserves computerId on the returned
ToolAssembly (mirrors cwd preservation), so the filter chain stays consistent.
- orchestrator: added @dispatch/wire dep to transport-http (build/config, my lane)
so its seam.ts Computer/ComputerEntry import resolves.
Verified: tsc -b EXIT 0, biome clean, 1641 vitest pass (was 1620, +21).
Refs: notes/ssh-support-plan.md (decisions §0.5/§13). No merge or push.
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New `mcp` standard extension (`packages/mcp/`) that makes Dispatch an MCP
host: spawns configured MCP servers (stdio child processes), performs the MCP
handshake (initialize → notifications/initialized), discovers tools via
tools/list, and registers each as a first-class Dispatch ToolContract via
host.defineTool. When the model calls an MCP tool, the extension proxies the
call to tools/call on the MCP server and returns the flattened result.
Architecture (sibling of `lsp` extension):
- Config: .dispatch/mcp.json (servers key) → opencode.json mcp key fallback,
resolved per-cwd (mirrors LSP config resolution)
- Transport: StdioTransport (spawn child, Content-Length framing + JSON-RPC 2.0)
- Client: initialize → tools/list → tools/call; handles list_changed
notifications for dynamic tool updates
- Registry: tool name namespacing (<serverId>__<toolName>), ToolContract
adapter that proxies execute → callTool, content flattening (text/image/
resource → string)
- Manager: one client per server, lazy-spawn, status(), shutdownAll()
- Extension: manifest (dependsOn session-orchestrator, capabilities spawn),
registers tools + a toolsFilter (drops disconnected server's tools),
mcpServiceHandle, deactivate kills all child processes
Phase 1 scope: stdio only, Tools only (no Resources/Prompts/HTTP/sampling).
Hand-rolled JSON-RPC + framing (zero external deps, adapts LSP patterns).
Wave 1 (agent): 12 source + 8 test files, 69 new tests.
Wave 2 (orchestrator): root tsconfig ref, host-bin CORE_EXTENSIONS
registration + package.json dep, bun install.
Verified: tsc -b EXIT 0, biome clean, 1537 vitest pass (was 1468, +69).
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