[reference-impl-sync] Reference Implementation sync: 15 new commits (2026-05-04)

[github-actions]

Automated Reference Implementation Sync

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

• Last merged commit: e42b726ca42bd1b2e099a956c9287ba9435ba3e5
• Reference Implementation HEAD: ced6613253a595769d2e77547f9e1caf6bef6438

Recent reference implementation commits

ced6613 Stabilize unknown session delete E2E assertions (#1198)
e8dabaf Update `@github/copilot` to 1.0.41-0 (#1195)
6a0e065 Refine version update logic to allow arbitrary identifiers (e.g., "beta", not just "preview") (#1193)
662f270 Add copilotHome option for configurable data directory (#1191)
180ca47 Support optional connection token for TCP servers (#1176)
d3abfa2 Add instructionDirectories session config support (#1190)
e0dd37b docs(python): clarify available_tools/excluded_tools filter all tools, not just built-ins (#1180)
c22f361 docs: replace non-existent ghcr.io/github/copilot-cli image with build instructions (#1189)
f7f9450 Expand E2E test coverage across all 4 SDKs (#1186)
f8cf846 Derive session event envelopes from schema (#1184)
fcdd615 Update `@github/copilot` to 1.0.40 (#1183)
ffe4f01 Update `@github/copilot` to 1.0.40-3 (#1182)
58ab82c Update `@github/copilot` to 1.0.40-1 (#1177)
155e887 Replace StreamJsonRpc with a custom JSON-RPC implementation in the .NET SDK (#1170)
fd16c3d docs: document --host for non-loopback headless connections (#1174)

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 · ● 197.7K · ◷

• expires on May 10, 2026, 9:05 PM UTC

[github-actions]

Superseded by a newer reference implementation sync check.