Add /llms.txt endpoint to trust center compliance page

Renders compliance data (frameworks, documents, audits, subprocessors, references, and external links) as a plain-text Markdown document. The endpoint supports all required visibility filters and pagination.

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

pkg/server/api/compliancepage/markdown_handler.go

@@ -0,0 +1,43 @@
+// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package compliancepage
+
+import (
+	"net/http"
+
+	"go.probo.inc/probo/pkg/trust"
+)
+
+type Handler struct {
+	trustService *trust.Service
+}
+
+func NewHandler(trustService *trust.Service) *Handler {
+	return &Handler{trustService: trustService}
+}
+
+func (h *Handler) HandleLLMsTxt(w http.ResponseWriter, r *http.Request) {
+	tc := CompliancePageFromContext(r.Context())
+	if tc == nil {
+		http.Error(w, "not found", http.StatusNotFound)
+		return
+	}
+
+	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+
+	if err := h.trustService.RenderCompliancePageMarkdown(r.Context(), w, tc.ID, tc.TenantID); err != nil {
+		http.Error(w, "internal server error", http.StatusInternalServerError)
+	}
+}

pkg/server/server.go

@@ -174,7 +174,10 @@ func (s *Server) stripTrustPrefix(next http.Handler) http.Handler {
 func (s *Server) trustCenterRouter() chi.Router {
 	r := chi.NewRouter()
 
+	h := compliancepage.NewHandler(s.trustService)
+
 	r.Mount("/api/trust/v1", s.apiServer.CompliancePageHandler())
+	r.Get("/llms.txt", h.HandleLLMsTxt)
 	r.Handle("/*", s.trustWebServer)
 
 	return r