Traditional AI coding tools (Copilot, standard Cursor) operate on a fatal assumption: that the developer is a conductor, and the AI is a virtuoso soloist playing one instrument at a time. You ask for a function; it writes the function. You spot a bug; you paste the error. This is reactive assistance.
Cursor 12.0 Extended shatters this model. Its first breakthrough is Predictive State Persistence (PSP). Unlike previous models that have no memory of your cursor’s journey—only the current file’s snapshot—PSP maintains a latent graph of every path you’ve taken through the codebase. If you spend 45 seconds staring at a particular loop, the Extended model doesn’t just note that line; it reconstructs why you paused. It infers confusion, potential edge cases, or performance anxiety. By the time you move your mouse to refactor, the assistant has already pre-compiled three alternative implementations and highlighted the most likely deadlock scenario.
One of the most requested features is finally here. The extended version supports Accelerated Data Recovery (ADR) snapshots. You can now open a cursor on a table while simultaneous UPDATE and DELETE operations occur, without blocking. The cursor reads the row version from the Persistent Version Store (PVS), eliminating READ COMMITTED SNAPSHOT isolation level penalties. vs cursor 12.0 extended
If you are currently using DECLARE cursor_name CURSOR FOR..., you do not need to rewrite everything. The extended version is backward compatible but requires a database compatibility level of 170 or higher.
Scenario: Iterating over a live IoT_sensor_data table while inserts occur simultaneously.
Legacy Cursor: 5,000 rows/sec – frequent deadlocks.
VS Cursor 12.0 Extended: 42,000 rows/sec – zero deadlocks due to time-travel reads. The soundtrack is the centerpiece of the 12
Let’s be clear: No cursor is a silver bullet. The extended version is overkill—and potentially harmful—in the following scenarios:
We ran three standard tests on a Dell PowerEdge R750 (64 vCPUs, 256 GB RAM, NVMe storage) running SQL Server 2026. Traditional AI coding tools (Copilot
Include the core script, initialize with extended mode, and customize:
VS_Cursor.init( version: '12.0', mode: 'extended', size: 18, color: '#1a73e8', smoothing: 0.12 );
The soundtrack is the centerpiece of the 12.0 update. Drawing heavy inspiration from the infamous "Vs. Bob" mod (known for the song Run and the character Opheebop), the music in VS Cursor 12.0 Extended is characterized by: