NousResearch/hermes-agent

Context compaction corrupts tool-call argument data

Cluster 122559. Data as of 2026-10-27 11:58 UTC

Nothing open on GitHub. Fix merged in #125036 on 27 Sep 2026. Check it covers your case.

open issues

open PRs

items grouped

Known?: Yes. 3 related items grouped here, 1 issue already closed.
Fix event: A fix was merged to main in PR #125036. Check it covers your case. No release data is tracked.
Tracker: The maintainers' tracker marks this resolved, deciding PR #125036. That is separate from the fix event.
Still open: Nothing open on GitHub.

Next step: read #125036, then check it covers your case.

Read #125036 Pick up a Lab task

These items concern a bug where context compaction/compression incorrectly rewrites or truncates tool-call arguments, allowing corrupted data to persist into message content or reach the filesystem. The group includes the bug report and two related fix attempts addressing argument preservation during compaction.

Open issues0

No open issues.

Open PRs0

No open pull requests.

Fixes on record

Merged to main. A stamp counts the issues a fix is linked to.

#125036 fix(context): stop compaction from rewriting old tool-call arguments

merged to main

files: agent/compression_marker.py, agent/context_compressor.py, tests/agent/test_context_compressor.py, tests/agent/test_tool_call_guardrail_runtime.py, website/docs/user-guide/configuration.md

1 PR closed without merging

From the close comments: done elsewhere 1

#122621 fix(context): preserve tool-call arguments through compaction · done elsewhere → 062dc1e, #125036

Closed issues · 1

Closed#122559[Bug]: context-compression markers persist into message content, and truncated tool-call arguments reach the filesystem

How this cluster was grouped

Link evidence (structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
Pairwise link density 0.67: the share of item 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.

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At a glance

Merged PRs: #125036
Closed issues: 1
Attempts: 1 PR closed without merging
Fix link checked: 27 Sep 2026

For your agent

The same facts, typed.

cluster/122559.json
cluster/122559.md