# NousResearch/hermes-agent · Stable per-message identity fields for context engines

## Open now

- Nothing open on GitHub.

These items concern adding stable per-message identity constructs — including message UIDs, merge witnesses, and per-occurrence tool-call IDs — for use by context engines and plugins. The cluster appears to represent iterations or salvage attempts of the same feature proposal.

## 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 #126687. Verify it addresses your case.
- **Recommended:** read PR #126687 (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-126687`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `1.00`: 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

- #126265: Stable per-message identity for context engines and plugins: message_uid, merge witness, per-occurrence tool-call ids

## Prior & competing PRs

- **#126687: feat(sessions): stable per-message identity for context engines (salvage #126307)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/agent_runtime_helpers.py`, `agent/context_compressor.py`, `agent/conversation_compression.py`, `agent/conversation_loop.py`, `agent/message_metadata.py`, `agent/micro_compaction.py`, `agent/model_metadata.py`, `agent/session_persistence.py`, `agent/transcript_repair.py`, `agent/transports/chat_completions.py`, `contributors/emails/239388517+100yenadmin@users.noreply.github.com`, `gateway/run.py`, `hermes_cli/cli_commands_mixin.py`, `hermes_cli/session_schema_history.py`, `hermes_state.py`, `hermes_state_common.py`, `hermes_state_identity.py`, `hermes_state_messages.py`, `hermes_state_portability.py`, `hermes_state_rewind.py` (+15 more)
- **#126307: feat(sessions): stable per-message identity for context engines (message_uid, merge witness, tool-call uids)**. closed without merge
  - maintainer direction: category `partial_fix`; implication `needs_llm`; refs `86c87a3cac3d26924cb69b1b183ef8788a726598`, `37daf85b2ad0ee50ed45d7234dc47b7fa24cec09`, `188a1a5efd098f067638032fea6e24c42d06178f`, `#126265`, `#120403`, `#117813`, `#118740`

## Fix status

- Merged to main in PR #126687 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-28`.