feat: release PocketIC v16.0.0 (#71)

dfinity/ic commit: fc21803c3c3a8dd452b3b58b959751c41fecb89c

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

Author: mraszyk

.github/workflows/pocket-ic-server-action-test.yml

@@ -19,11 +19,11 @@ jobs:
             expected-version: '5.0.0'
             os: macos-15-intel # x86_64
 
-          - expected-version: '15.0.0'
+          - expected-version: '16.0.0'
             os: ubuntu-latest
-          - expected-version: '15.0.0'
+          - expected-version: '16.0.0'
             os: macos-15-intel # x86_64
-          - expected-version: '15.0.0'
+          - expected-version: '16.0.0'
             os: macos-latest # arm64
 
           - version: 'ee4c728d94b10437f41edf564650ac63cd0c0c5d'

CHANGELOG.md

@@ -7,6 +7,36 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 
 
+## 16.0.0 - 2026-09-01
+
+### Added
+- The endpoint `/instances/<instance_id>/update/mock_flexible_canister_http` to mock the responses of the committee nodes
+  of a pending *flexible* canister HTTP outcall, i.e. one made through the `flexible_http_request` management canister endpoint.
+- The endpoint `/instances/<instance_id>/read/get_canister_http` reports two additional fields for every pending canister HTTP
+  outcall: `replication`, describing how the outcall is replicated across the nodes of its subnet (`FullyReplicated`,
+  `NonReplicated`, or `Flexible` with the outcall's `total_requests`, `min_responses`, and `max_responses`), and
+  `pricing_version`, reporting whether it is priced with the `Legacy` or the `PayAsYouGo` pricing model.
+- Enabling beta features (the field `beta_features` of `icp_config` when creating an instance) now enables the
+  `flexible_http_request` management canister endpoint on subnets that charge for HTTP outcalls; without beta features that
+  endpoint is only available on subnets where HTTP outcalls are free (system subnets and subnets with a free cycles cost
+  schedule). Beta features also enable the pay-as-you-go pricing model, which flexible outcalls are always priced with and
+  which an `http_request` can select through its `pricing_version` field.
+
+### Changed
+- The endpoint `/instances/<instance_id>/auto_progress` (and creating an instance with automatic progress enabled)
+  only returns after the certified time of the PocketIC instance has been updated for the first time.
+- Mocked canister HTTP responses report the cycles their node actually spent on the outcall, instead of reporting no spend at
+  all. This applies to `/instances/<instance_id>/update/mock_canister_http` and
+  `/instances/<instance_id>/update/mock_flexible_canister_http`. The spend is derived from the size of the mocked response;
+  unlike a real node, a mocked one is charged no response time, so what a mocked outcall costs does not depend on how fast the
+  machine running the test is.
+- Mocking a canister HTTP response whose reject message exceeds 1 KiB now fails. Such a response is not one any node could have
+  reported.
+- A node that cannot pay for gossiping its mocked reject reports an out-of-cycles reject instead of the mocked one, matching
+  what a node of a real subnet does under pay-as-you-go pricing.
+
+
+
 ## 15.0.0 - 2026-06-26
 
 ### Added

README.md

@@ -30,7 +30,7 @@ You can specify a particular version of the PocketIC server to install using the
     - name: Install PocketIC server
       uses: dfinity/pocketic@main
       with: 
-        pocket-ic-server-version: "15.0.0"
+        pocket-ic-server-version: "16.0.0"
 ```
 
 ## Download the PocketIC Server

action.yml

@@ -5,7 +5,7 @@ inputs:
     description: >
       The PocketIC server version to install.
       If omitted, the latest version will be installed.
-    default: '15.0.0'
+    default: '16.0.0'
 
 runs:
   using: composite