Compressor tail-budget token underestimate for tool_call envelopes
Cluster 28053 · agent. Data as of
Nothing open on GitHub. Fix merged in #50751 on 22 Jun 2026. Check it covers your case.
The short answer
- Known?
- Yes. 4 related items grouped here, 1 issue already closed.
- Fix event
- A fix was merged to main in PR #50751. Check it covers your case. No release data is tracked.
- Tracker
- The maintainers' tracker marks this
resolved, deciding PR #50751. That is separate from the fix event. - Still open
- Nothing open on GitHub.
One bug report describes _find_tail_cut_by_tokens underestimating assistant message tokens, which affects tail protection and compression. The other three members are pull requests with near-identical titles about counting the tool_call envelope in the tail-budget token estimate, referencing #28053 (and #23767 in one).
Open issues0
Open PRs0
Fixes on record
-
#50751 fix(compressor): count tool_call envelope in tail-budget token estimate (#23767, #28053)
files:
agent/context_compressor.py,scripts/release.py,tests/agent/test_compressor_tool_call_budget.py
2 PRs closed without merging
From the close comments: merged via another change 1 · stale or abandoned 1
Closed issues · 1
- Closed#28053[Bug]: _find_tail_cut_by_tokens underestimates assistant message tokens by 2-15x — tail protection overshoots and compression becomes ineffective
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structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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
0.50: the share of item pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36.1.00means every pair is linked.
Pick up a Lab task
Check whether a fix covers the open issues here, with your own agent. Bring back evidence for maintainers.
Open the LabAt a glance
- Subsystem
- agent
- Merged PRs
- #50751
- Closed issues
- 1
- Attempts
- 2 PRs closed without merging
- Fix link checked
- 22 Jun 2026