Release 6.7 · CarnegieLearningWeb/UpGrade

✨ New

Native Thompson Sampling (adaptive experiments). Adaptive experiments now run entirely inside UpGrade; the external MoocLet service is no longer needed. The experiment form looks the same, but some settings have new names: Warmup Threshold, Batch Size, Minimum Draw Difference, plus success/failure priors for each condition. Thompson Sampling can't be combined with Within-Subjects assignment.
- POST /v6/reward now replies right away and records the reward in the background. To wait for the real result (including a 409 if the reward couldn't be recorded), add ?awaitResult=true.
List details page. Open an include/exclude list to page through its values, add, edit, or delete them, and import or export them as CSV.
Search by list value. On the Experiments, Feature Flags, and Segments pages, you can search for a value inside their lists, for example every experiment that includes a given school ID.
Better error screens. Experiment, feature flag, and segment pages now show a "not found" or error screen with a retry button instead of spinning forever.
Protected metrics. A metric that an experiment uses can no longer be deleted. The UI disables the delete button, and the API returns 409.

/mark and /assign now pick the same experiment when several experiments share a decision point (pooling). Before, marks could be credited to the wrong experiment.
/v6/mark now accepts context and returns 400 for an invalid context. Older clients that don't send context still work, because the server works it out. This will be deprecated in a future release.
The Edit List modal now fills in correctly for legacy list types.
Deleting an experiment, feature flag, or segment now waits for its private lists to be cleaned up before it finishes.
The feature flag API now returns 404 instead of 204 for unknown IDs.

/assign: segment joins were removed from the main query, and the exclusion lookups now run in parallel.
Experiment list and detail queries no longer multiply rows across inclusions and exclusions.

JS 6.7.0: smaller bundle (class-validator removed), sends context on mark, and sends Client-Context and Client-Version headers.
Java: sends context on mark and sends the client-context and client-version headers.
C#: the client library has been removed because it was unsupported.

The v5 client API has been removed. All /api/v5/* client endpoints are gone, so clients must use v6.
MoocLet has been removed. The MOOCLETS_* environment variables are no longer read. The nativeThompsonSampling migration drops the MoocLet tables and converts existing ts_configurable experiments to thompson_sampling.
New optional DB pool settings: TYPEORM_MIN_CONNECTION_POOL_SIZE, TYPEORM_IDLE_TIMEOUT_SECONDS, TYPEORM_MAX_LIFETIME_SECONDS, TYPEORM_KEEP_ALIVE, TYPEORM_KEEP_ALIVE_INITIAL_DELAY_SECONDS. If you leave them unset, the pool behaves as it did before.
Temporary diagnostics: setting PERF_DIAG_ENABLED=true writes perfdiag JSON lines to stdout. They cover the event loop, GC, the pg pool and its settings, and cache writes.
New Relic: client API transactions are now tagged with clientContext and clientVersion.