chore: track all project map and index files

Add generated .pi-map.md and .pi-map.index.md files across the repository
so the project navigation maps are shared and versioned. These artifacts
are maintained by project_map_init/patch/validate and must be kept in
sync with source edits.

Note: .cache/ remains ignored (added in previous commit).

openspec/specs/instance-proxy/.pi-map.index.md

@@ -0,0 +1,19 @@
+# openspec/specs/instance-proxy (index)
+dir: openspec/specs/instance-proxy
+
+## role
+Defines the API contract for a secure proxy service that routes HTTP/WebSocket traffic to running tool instances with owner-scoped access control.
+## parent
+index: openspec/specs/.pi-map.index.md
+map: openspec/specs/.pi-map.md
+## children
+-
+## files
+- spec.md
+## links
+index: openspec/specs/instance-proxy/.pi-map.index.md
+map: openspec/specs/instance-proxy/.pi-map.md
+## workflows
+-
+## dirty
+-

openspec/specs/instance-proxy/.pi-map.md

@@ -0,0 +1,19 @@
+# openspec/specs/instance-proxy
+dir: openspec/specs/instance-proxy
+
+index: openspec/specs/instance-proxy/.pi-map.index.md
+
+## role
+Defines the API contract for a secure proxy service that routes HTTP/WebSocket traffic to running tool instances with owner-scoped access control.
+## files
+- spec.md | Specifies API requirements for an HTTP/WebSocket proxy endpoint that forwards requests to running tool instances with owner-based access control
+## arch
+Specification-driven API design using markdown-based OpenAPI-style documentation with WebSocket upgrade support, reverse proxy patterns, and owner-based authorization middleware.
+## tags
+spec, specifies, api, requirements, http, websocket, proxy, endpoint
+## symbols
+-
+## workflows
+-
+## dirty
+-