Reference implementation sync: 41 new commits (2026-04-20)

[edburns]

Automated Reference Implementation Sync

There are 41 new commits in the official Copilot SDK since the last merge.

• Last merged commit: c3fa6cbfb83d4a20b7912b1a17013d48f5a277a1
• Reference implementation HEAD: 922959f4a7b83509c3620d4881733c6c5677f00c

Recent reference implementation commits

922959f Expose IncludeSubAgentStreamingEvents in all four SDKs (#1108)
fd0495c Update @github/copilot to 1.0.32 (#1107)
cf5694c Update @github/copilot to 1.0.32-1 (#1105)
48e244d Clean up redundant Python codegen lambdas (#1104)
dbcea81 Add deprecated schema support to all four code generators (#1099)
883cc02 Update @github/copilot to 1.0.30 (#1096)
719beb0 Update @github/copilot to 1.0.29 (#1092)
c04c8c0 Add runtime header options across SDKs (#1094)
21c6d5e Update @github/copilot to 1.0.28 (#1089)
a6662b7 fix: fetch remote branch before checkout in update-copilot-dependency workflow (#1088)
a5810d3 Fix update-copilot-dependency workflow to handle closed PRs (#1087)
97c10ae Fix CI not triggering on automated dependency update PRs (#1086)
d519ac4 Update @github/copilot to 1.0.27 (#1078)
3e1b65e feat: add per-agent skills support (#995)
06e4964 Update @github/copilot to 1.0.26 (#1076)
972b663 Add $ref support to all four language code generators (#1062)
6722743 Generate dedicated Python session event types (#1063)
68f46b3 Naming improvements via codegen changes (#1043)
16f0ba2 Update @github/copilot to 1.0.22 (#1055)
ca93613 Enhance C# generator with richer typing and data annotations (#1067)

Instructions

Follow the agentic-merge-reference-impl prompt to port these changes to the Java SDK.