[reference-impl-sync] Reference Implementation sync: 15 new commits (2026-05-11)

[github-actions]

Automated Reference Implementation Sync

There are 15 new commits in the official Copilot SDK since the last merge.

• Last merged commit: 066a69c1e849adf1bd98564ab1b52316ec471182
• Reference Implementation HEAD: 4a0437bb03a0b60a1867f14ae8e3faf053afa5aa

Recent reference implementation commits

4a0437b Update README and guide for Rust SDK (#1259)
f72bf0f Add Maven Central badge to README (#1254)
8794594 Expand Rust E2E coverage (#1250)
4901dff Add Go reference badge to README (#1253)
f625779 Handle empty session fork behavior in E2E tests (#1247)
d5c8db4 fix(go): capture CLI stderr and fix SetProcessDone race (#863)
30a76a5 Replace Go RPC quicktype generation (#1234)
ac55e9a Update `@github/copilot` to 1.0.44-3 (#1239)
55b3b1c Unify Rust SDK release with publish.yml workflow (#1237)
ce56eb8 Fix SDK documentation typos (#1235)
299ea21 Default publish workflow to prerelease (#1233)
97f505c Disable CI workflows on forked repositories (#1232)
b0d1c8e feat(rust): support binary tool results (#1222)
671b50a Restore mode handler APIs across SDKs (#1228)
e759700 Use string enums for .NET session events (#1226)

Instructions

You MUST follow these steps in order. Do NOT improvise or skip scripts.

1. ✅✅Read .github/prompts/agentic-merge-reference-impl.prompt.md in full before starting✅✅

❌❌Do NOT clone the reference implementation manually — the start script does this.❌❌
❌❌Do NOT update .lastmerge manually — the finish script does this.❌❌
❌❌Do NOT skip the finish script — it syncs codegen versions and updates .lastmerge.❌❌

Generated by Reference Implementation Sync · ● 283.8K · ◷

• expires on May 17, 2026, 5:40 PM UTC