# NousResearch/hermes-agent · MCP spillover cache stores wrong envelope format

## Open now

- Nothing open on GitHub.

A bug was identified where the desktop spillover cache was persisting raw MCP JSON-RPC envelopes instead of extracting and storing the plain text content. The members address diagnosing and fixing how MCP result data is spilled and paginated correctly.

## 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 #124813. Verify it addresses your case.
- **Recommended:** read PR #124813 (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-124813`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #90426: \[Bug\]: Desktop spillover cache stores raw MCP JSON-RPC envelope instead of text content

## Prior & competing PRs

- **#124813: fix(tools): spill MCP result envelopes as pageable text**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `tests/tools/test_tool_result_storage.py`, `tools/tool_result_storage.py`
- **#90565: fix(mcp): persist spillover text without envelope**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#124813`, `#90426`

## Fix status

- Merged to main in PR #124813 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-27`.
- Subsystem: `apps/desktop`