# NousResearch/hermes-agent · Memory backend design and retrieval improvements

## Open now

- Nothing open on GitHub.

These items explore different approaches to memory storage and retrieval for Hermes, including a holographic store, a video-based single-file backend (Memvid), structured fact extraction, and guidance constraints on what gets persisted.

## TL;DR

- 4 member(s): 0 open issue(s), 2 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 #22781. Verify it addresses your case.
- **Recommended:** read PR #22781 (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: `unresolved`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_PARTIAL`): some members are connected by structural evidence (shared changed files, or a closing/superseded reference); the rest are joined by an automated relevance judgement over their text.
- Members outside that structural core may belong to a different underlying problem.
- Pairwise link density `0.39`: 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

- #2184: Feature: Richer local memory — structured retrieval and fact extraction beyond flat files
- #23874: RFC: Evaluate Memvid as a Pluggable Single-File Memory Backend for Hermes

## Prior & competing PRs

- **#22781: fix(memory): tighten MEMORY_GUIDANCE against ephemeral PR/issue/SHA notes**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`; implication `superseded`
  - files: `agent/prompt_builder.py`
  - fix hunks:
  - `agent/prompt_builder.py`

    ```diff
    @@ -157,6 +157,9 @@ def _strip_yaml_frontmatter(content: str) -> str:
         "User preferences and recurring corrections matter more than procedural task details.\n"
         "Do NOT save task progress, session outcomes, completed-work logs, or temporary TODO "
         "state to memory; use session_search to recall those from past transcripts. "
    +    "Specifically: do not record PR numbers, issue numbers, commit SHAs, 'fixed bug X', "
    +    "'submitted PR Y', 'Phase N done', file counts, or any artifact that will be stale "
    +    "in 7 days. If a fact will be stale in a week, it does not belong in memory. "
         "If you've discovered a new way to do something, solved a problem that could be "
         "necessary later, save it as a skill with the skill tool.\n"
         "Write memories as declarative facts, not instructions to yourself. "
    ```
- **#2351: feat(plugin): hermes-memory-store with holographic retrieval**. closed without merge
  - maintainer direction: category `silent_close`; implication `active`

## Fix status

- Merged to main in PR #22781 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-05-09`.
- Subsystem: `agent`