The My Picos page will be at  http://localhost:8080/ , assuming that you have used the default port and are running the pico engine on your own machine.

When you visit this page, you will see a rounded rectangle which represents your owner pico. It can be dragged to move it to a different location on the canvas. You can drag a corner to reshape and resize it.

A single left mouse click on the rounded rectangle will open it up for a more detailed look at the properties of your owner pico.

The information about the pico is organized with tabs.

• About tab contains the pico's identifier (ID) and secret event channel identifier (ECI), allows you to change it's display name, and/or color. This tab also shows any child picos, the parent pico if it has one, and allows you to create child picos, giving each one a display name and color.
• Rulesets tab contains a list of rulesets installed in this pico. A checkbox to the left of each ruleset identifier (RID) when checked will allow you to see the entity variables of this ruleset which are stored in the pico. There is also an input box that you can use to install a ruleset from a raw KRL source code URL. Finally, there is a list of rulesets which are registered in the pico engine, but not installed in your pico. If it makes sense, you can select one of these and install it into the pico.
• Channels tab shows the list of ECI's which can be used to contact the pico. Normally, the main secret ECI is never used by outside applications. Instead you use the input boxes in this tab to create new channels for separate purposes.  This tab also allows you to delete channels which you have previously created. Doing so revokes the ability of outside applications to use the ECI again.
• Subscriptions tab shows the list of subscriptions in which the pico participates. Checking the box shows more detail about the subscription. It is planned to add a set of input boxes to this tab to allow you to initiate subscription requests, and respond to pending subscription requests.
• Logging tab allows you to see detailed logging information concerning events and queries sent to the pico. To enable logging you must (using the Rulesets tab) install the io.picolabs.logging ruleset in the pico, and then turn logging on.
• Testing tab has a list of rulesets which are installed in the pico. Checking the box beside a ruleset RID opens a list of forms which will permit you to supply arguments and send queries and/or events to the pico. The results of these queries and events will be displayed on the right side of the tab's display area.

How to specify tests in the Testing tab

The tests in the Testing tab are generated from information that you, the developer of a ruleset, define in your ruleset. The information must be bound to the name __testing and that name must be shared by a pragma in the meta block of your ruleset. That is, the meta block must specify that the ruleset shares __testing.

For example, consider this annotated screenshot of a Testing tab. The pico has three rulesets installed. Only the ruleset whose RID is timing_tracker has its checkbox checked, so only its tests are showing. We just clicked on the link "__testing" so the Results area is showing the __testing map itself.

Notice that this ruleset has defined four tests:

1. the query for __testing
2. the query for entries
3. the timing/started event with two event attributes, named number and name
4. the timing/finished event with one event attribute, named number

By following the green arrows you can see which part of the __testing map specified each test.

The timing_tracker ruleset meta and global blocks are shown here:

ruleset timing_tracker {
  meta {
    shares entries, __testing
  }
  global {
    entries = function() {
      ent:timings.defaultsTo({}).values()
    }
    __testing = { "queries": [ { "name": "__testing" },
                               { "name": "entries" } ],
                  "events": [ { "domain": "timing", "type": "started",
                                "attrs": [ "number", "name" ] },
                              { "domain": "timing", "type": "finished",
                                "attrs": [ "number" ] }] }
  }

The name __testing is bound to a map with two keys, "queries" and "events", each of which is an array of maps.

Each query map has a key "name" for the shared name bound to a function or value, and if needed, a key "args" whose value is an array of argument names for a function.

An event map has keys "domain" and "type" for the domain and type of the event, and if needed, a key "attrs" whose value is an array of attribute names.