# NousResearch/hermes-agent · A2A listener IPv6 host binding and advertising (::1, ::)

## Open now

- Nothing open on GitHub.

These members center on the A2A listener and IPv6 host handling: one bug report describes A2A_HOST=::1 giving a \`bind_failed\` error, and two pull requests propose changes to bind and advertise IPv6 hosts, including :: serving IPv6 and IPv4 peers on one socket. The titles do not establish whether any change has been merged or whether the problem is fixed.

## TL;DR

- 3 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 1 PR(s) closed without merging.
- A fix was merged to main in PR #135309. Verify it addresses your case.
- **Recommended:** read PR #135309 (and any competing PRs below) before filing. Confirm the merged change covers your symptom.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `resolved` · deciding PR(s): `pr-135309`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.67`: the share of member pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. `1.00` means every pair is linked.

## Closed / duplicate issues

- #126284: \[Bug\]: A2A listener cannot bind an IPv6 host (A2A_HOST=::1 fails with bind_failed)

## Prior & competing PRs

- **#135309: A2A binds A2A_HOST=:: and serves IPv6 and IPv4 peers on one socket (fixes #126284, salvage #126285)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `contributors/emails/[redacted:email]`, `plugins/platforms/a2a/adapter.py`, `plugins/platforms/a2a/security.py`, `tests/plugins/test_a2a_plugin.py`, `website/docs/user-guide/messaging/a2a.md`
- **#126285: fix(a2a): bind and advertise IPv6 hosts such as ::1**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `8ddf6d1234`, `#135309`

## Fix status

- Merged to main in PR #135309 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-10-20`.
- Subsystem: `gateway`