# NousResearch/hermes-agent · Slack appendStream markdown_text and chunks conflict fix

## Open now

- Nothing open on GitHub.

A bug caused Slack native task cards to fail because markdown_text was incorrectly sent alongside chunks in chat.appendStream calls. Multiple fixes address removing markdown_text from the payload to resolve the API conflict.

## TL;DR

- 8 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 6 PR(s) closed without merging.
- A fix was merged to main in PR #104173. Verify it addresses your case.
- **Recommended:** read PR #104173 (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-104173`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.25`: 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

- #87743: \[Bug\]: Slack native task cards always fail: chat.appendStream rejects chunks + markdown_text combo (cannot_provide_both_markdown_text_and_chunks)

## Prior & competing PRs

- **#104173: Slack native task cards render again: chat.appendStream is chunks-only (#87743, salvage #87746)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`; implication `superseded`
  - files: `evals/slack_stream_wire_contract.py`, `plugins/platforms/slack/adapter.py`, `tests/gateway/test_slack.py`
- **#87746: fix(slack): drop markdown_text from native task-card appendStream payload**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `4c287fa7bf4`, `#104173`, `#104154`
- **#87752: fix(slack): restore native task cards for tool progress**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `4c287fa7bf4`, `#104173`, `#104154`
- **#87755: fix(gateway): stop sending markdown_text alongside chunks in Slack chat.appendStream**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `4c287fa7bf4`, `#104173`, `#87746`, `#104154`
- **#100510: fix(slack): avoid mixed native task-card payloads**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `4c287fa7bf4`, `#104173`, `#87746`, `#104154`
- **#103197: fix(slack): stop mixing markdown_text into native task-card appendStream; cards now say WHY they failed**. closed without merge
  - maintainer direction: category `stale_abandoned`; implication `active`; refs `#87743`
- **#103982: fix(slack): salvage chunks-only native task-card updates**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `4c287fa7bf4`, `#104173`, `#87746`, `#104154`

## Fix status

- Merged to main in PR #104173 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-06`.
- Subsystem: `gateway`