Fixed

• The plugin did not load at all. plugin.yml declared authors: with a single name where Bukkit expects a list, so the server rejected the plugin with InvalidDescriptionException: authors are of wrong type. This affected 1.0 as well. If LightVision never showed up in /plugins, this was why.
• The darkness trigger never switched off again. Automatic night vision was written into the saved player state, so the check meant to take it away could never fire. Anyone who once stood in the dark kept night vision permanently, across restarts, even after the trigger was disabled. It is now tracked separately, never saved, and gives way as soon as the player uses /lv.
• /lv unblock <name> could freeze the server. Offline lookups asked Mojang over the network on the main thread. Names now come from the server cache, a raw UUID works too, and unknown names finally report "player not found".
• Night vision from potions and beacons is no longer stripped. The plugin only removes effects it handed out itself. Blocking a player still clears night vision outright.
• /lv reload applies to everyone online. A changed world blacklist or a disabled darkness trigger used to take effect only after a world change or rejoin.
• Tab completion no longer shows block, unblock, reload and the full player list to players without lv.admin.

Changed

• data.yml is written off the main thread, at most once a minute, and only when something changed. Blocking and unblocking still saves immediately.
• data.yml no longer grows forever - only players who are actually on get stored.
• The light check on movement is rate limited to twice a second per player instead of running on every block walked.
• Non-text values under messages are rejected with a console warning instead of silently becoming the word "true".
• LightVision is now open source under the GNU General Public License v3.0: https://github.com/LucasTHCR/LightVision