Rdecorate

Attach ambient or hidden detail to the room you are
            standing in. Two kinds of detail are supported:

                tdesc   Visible to everyone on `look`. Renders
                        as a separate line below the main room
                        description, suffixed with a cyan-lite
                        `[Temporary, 3h ago]` tag.

                hdesc   Hidden. Not shown on a plain `look`
                        until a player has discovered it. To
                        find one, players run `search` and pass
                        an Observation roll modified by the
                        difficulty you set. Once found, the
                        detail stays visible to that specific
                        player on every subsequent `look` (until
                        it expires).

            Both kinds auto-expire after 7 in-game days. There
            is no player-side remove -- if a desc needs to come
            down before it expires, ask an admin to clear it via
            @rdecorate/remove.

            # subtopics

            ## Usage

                rdecorate/tdesc <text>
                rdecorate/hdesc <difficulty>=<text>
                rdecorate/list

            The difficulty in hdesc is a GURPS skill modifier
            (an integer). 0 is average, positive numbers make the
            detail easier to spot, negative numbers harder. See
            help roll difficulty for the full scale and
            recommended ranges.

            list shows your own contributions to this room
            (each with its remaining age) so you can keep track
            of what you've placed where.

            ## Examples

                rdecorate/tdesc someone has scrawled "WAKE UP" on the wall
                rdecorate/tdesc the air smells faintly of ozone
                rdecorate/hdesc -4=a thin razor is wedged behind the picture
                rdecorate/hdesc 0=a single boot-print near the door
                rdecorate/list

            ## How `search` reveals hidden descs

            When a player types `search`, the room broadcasts a
            short pose so onlookers know they are searching. For
            each undiscovered hidden description, the searcher
            rolls Observation at the desc's difficulty. Each
            successful roll surfaces one hidden detail privately
            to the searcher and records them as a discoverer.

            Once discovered, the detail appends to that player's
            `look` output as

                <desc> [Hidden, <age>]

            in the same cyan-lite tagged style as tdescs. They
            never need to roll for it again -- they remember it.
            Discoveries are per-player; another character in the
            same room still has to find it themselves.

            Failures are silent: the searcher isn't told how many
            descs they missed, or whether any exist at all.

            ## Storage

            Both kinds live on the room as attributes
            (room.db.temp_descs, room.db.hidden_descs)
            and persist across reloads. Expired temp descs are
            pruned lazily on the next render or `rdecorate/list`.