Cairn

Agent image eviction threshold and cache prefix fix

NousResearch/hermes-agent · cluster 113517

Data as of

Nothing open on GitHub. Fix merged in #113953. Check it covers your case.

The short answer

0open issues
0open PRs
5items grouped
Known?
Yes. 5 related items grouped here, 1 issue already closed.
Fix event
A fix was merged to main in PR #113953. Check it covers your case. No release data is tracked.
Tracker
The maintainers' tracker marks this resolved, deciding PR #113953. That is separate from the fix event.
Still open
Nothing open on GitHub.

These issues and PRs address a bug where image eviction was triggering based on a fixed keep-newest count rather than provider limits, which was invalidating the Anthropic prompt-cache prefix on nearly every turn. The work focuses on aligning eviction behavior with provider-specific limits to preserve the cached prefix across batches.

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.

  • #113953 fix(agent): image eviction fires at the provider limit and holds the cached prefix between batches (#113517, salvage #113519)

    merged to main

    files: agent/anthropic_message_convert.py, agent/context_compressor.py, agent/image_eviction_policy.py, tests/agent/test_image_eviction_policy.py, tests/agent/test_outbound_stale_vision.py, tests/tools/test_computer_use.py, website/docs/user-guide/features/computer-use.md

3 PRs closed without merging

From the close comments: done elsewhere 1 · duplicate 1 · partial fix 1

  • #113519 fix(agent): evict images at the provider limit, not on a keep-newest count · done elsewhere → #113619
  • #113542 fix(agent): evict images at provider limits to preserve prompt-cache prefix · duplicate → #113517, #113519
  • #113619 fix(agent): evict images at provider limits to preserve prompt-cache prefix · partial fix → 4fe8367, 3977a2a, bafbf88, #113517, #113519, #103217, #113542, #102959
Closed issues · 1
  • Closed#113517Image eviction fires at a keep-newest count of 3, invalidating the Anthropic prompt-cache prefix on nearly every turn
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(structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 0.40: 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
#113953
Closed issues
1
Attempts
3 PRs closed without merging
Fix link checked
17 Sep 2026

For your agent

The same facts, typed.

cluster/113517.json
cluster/113517.md