chore(main): release 3.1.0

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "3.0.0"
+  ".": "3.1.0"
 } 

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## Unreleased
+## [3.1.0](https://github.com/growthbook/growthbook-python/compare/v3.0.0...v3.1.0) (2026-09-05)
 
 ### Features
 
@@ -15,6 +15,8 @@
   * Sync client: `GrowthBook(defer_tracking=True)` with `get_deferred_tracking_calls()` / `clear_deferred_tracking_calls()`.
   * Async client: pass a per-request `TrackingBuffer` to `eval_feature` / `run` / `is_on` / `is_off` / `get_feature_value` and read it with `buffer.get_calls()`; the caller owns the buffer, so concurrent requests never mix exposures.
 
+* prerequisite exposure telemetry and deferred tracking ([4dac52f](https://github.com/growthbook/growthbook-python/commit/4dac52f9028f426a87b2c558e75def7f1de7b205))
+
 ### Performance
 
 * Telemetry plumbing overhead on evaluations with no callbacks configured, measured with `tests/scripts/benchmark_eval_overhead.py` (500k sequential in-memory evals, best of 5): the default-value path costs ~0.13 microseconds more per evaluation than 3.0 (~1.29 -> ~1.42 us/eval, ~10%); a realistic experiment-rule path is within ~1% (~6.3 us/eval). The residual is the `EvaluationContext` carrying the callback fields — the mechanism that fixes silently-dropped prerequisite exposures — and is accepted deliberately; usage bookkeeping and the deprecated-kwarg shim are already skipped entirely when unused.

growthbook/__init__.py

@@ -109,5 +109,5 @@
 ]
 
 # x-release-please-start-version
-__version__ = "3.0.0"
+__version__ = "3.1.0"
 # x-release-please-end

setup.cfg

@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 3.0.0
+current_version = 3.1.0
 commit = True
 tag = True