diff --git a/workspace-server/internal/handlers/terminal.go b/workspace-server/internal/handlers/terminal.go
index 041a739f..62fe74b4 100644
--- a/workspace-server/internal/handlers/terminal.go
+++ b/workspace-server/internal/handlers/terminal.go
@@ -77,17 +77,26 @@ func (h *TerminalHandler) HandleConnect(c *gin.Context) {
 	// A2A message-passing, so we apply the same hierarchy check here.
 	// GH#756/#1609 security fix: if the caller claims a specific workspace
 	// identity (X-Workspace-ID header), the bearer token — if present — must
-	// belong to that claimed workspace. ValidateAnyToken accepted ANY valid org
-	// token, allowing Workspace A to forge X-Workspace-ID: B and reach B's
-	// terminal if A held any valid token. ValidateToken binds the token to
-	// the claimed workspace identity.
+	// belong to that claimed workspace. Previously ValidateAnyToken accepted
+	// ANY valid org token, allowing Workspace A to forge X-Workspace-ID: B
+	// and reach B's terminal if A held any valid token. ValidateToken binds
+	// the workspace-scoped token to the claimed workspace identity. Org-level
+	// tokens are handled separately via the org_token_id context key.
 	callerID := c.GetHeader("X-Workspace-ID")
 	if callerID != "" && callerID != workspaceID {
 		tok := wsauth.BearerTokenFromHeader(c.GetHeader("Authorization"))
 		if tok != "" {
 			if err := wsauth.ValidateToken(ctx, db.DB, callerID, tok); err != nil {
-				c.JSON(http.StatusUnauthorized, gin.H{"error": "invalid token for claimed workspace"})
-				return
+				// Org-scoped tokens (org_api_tokens) are validated at the org level
+				// by WorkspaceAuth and do not have a workspace_auth_tokens row, so
+				// ValidateToken always returns ErrInvalidToken for them. If WorkspaceAuth
+				// already validated an org token (org_token_id set in context), trust
+				// the X-Workspace-ID claim — the hierarchy is enforced by
+				// canCommunicateCheck below. Reject everything else.
+				if c.GetString("org_token_id") == "" {
+					c.JSON(http.StatusUnauthorized, gin.H{"error": "invalid token for claimed workspace"})
+					return
+				}
 			}
 		}
 		if !canCommunicateCheck(callerID, workspaceID) {
diff --git a/workspace-server/internal/handlers/terminal_test.go b/workspace-server/internal/handlers/terminal_test.go
index 326354c6..4a3f29fd 100644
--- a/workspace-server/internal/handlers/terminal_test.go
+++ b/workspace-server/internal/handlers/terminal_test.go
@@ -455,3 +455,38 @@ func TestTerminalConnect_KI005_AllowsSiblingWorkspace(t *testing.T) {
 	}
 }
 
+// TestKI005_OrgToken_SkipsValidateToken verifies that when WorkspaceAuth already
+// validated an org token (org_token_id set in gin context), the X-Workspace-ID
+// claim is trusted without a workspace_auth_tokens lookup. The hierarchy is still
+// enforced by canCommunicateCheck. Regression guard for the A2A routing regression
+// introduced in GH#1885: internal routing uses org tokens which are not in
+// workspace_auth_tokens, so ValidateToken would always fail for them.
+func TestKI005_OrgToken_SkipsValidateToken(t *testing.T) {
+	setupTestDB(t) // no ValidateToken ExpectQuery — none should fire
+	prev := canCommunicateCheck
+	canCommunicateCheck = func(callerID, targetID string) bool {
+		// Simulate platform agent → target workspace (same org).
+		return callerID == "ws-platform" && targetID == "ws-target"
+	}
+	defer func() { canCommunicateCheck = prev }()
+
+	h := NewTerminalHandler(nil)
+	w := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(w)
+	c.Params = gin.Params{{Key: "id", Value: "ws-target"}}
+	c.Request = httptest.NewRequest("GET", "/workspaces/ws-target/terminal", nil)
+	c.Request.Header.Set("X-Workspace-ID", "ws-platform")
+	c.Request.Header.Set("Authorization", "Bearer org-token-abc123")
+	// Simulate WorkspaceAuth having validated the org token (orgtoken.Validate
+	// succeeded). HandleConnect must skip ValidateToken and trust the claim.
+	c.Set("org_token_id", "tok-org-abc")
+
+	h.HandleConnect(c)
+
+	// Org token path: ValidateToken skipped → canCommunicateCheck=true →
+	// falls through to Docker path → 503 nil-docker (no Docker client).
+	if w.Code != http.StatusServiceUnavailable {
+		t.Errorf("org-token A2A: got %d, want 503 nil-docker (%s)", w.Code, w.Body.String())
+	}
+}
+