Gateway context pin reuse bug after eviction/wake
Cluster 131031 · gateway. Data as of
Nothing open on GitHub. Fix merged in #139865 on 16 Oct 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 #139865. Check it covers your case. No release data is tracked.
- Tracker
- The maintainers' tracker marks this
resolved, deciding PR #139865. That is separate from the fix event. - Still open
- Nothing open on GitHub.
A bug where internal wakes following eviction, stop, undo, or model changes cause the session-context prompt to be re-rendered incorrectly, breaking prefix cache state. The cluster covers the bug report and related fix attempts addressing context pin rehydration.
Open issues0
Open PRs0
Fixes on record
-
#139865 fix(gateway): synthetic goal/heartbeat turns and post-eviction wakes keep the system prompt byte-stable (#126109, #131031, salvage #131032 #126155)
files:
gateway/platforms/event.py,gateway/run_agent_cache.py,gateway/run_busy.py,gateway/run_goals.py,gateway/run_turn.py,gateway/run_turn_prepare.py,gateway/session_envelope.py,gateway/slash_commands_goals.py,tests/gateway/test_internal_event_pin_wiring.py,tests/gateway/test_queue_consumption.py
2 PRs closed without merging
From the close comments: superseded by another PR 1 · other 1
-
#131032 fix(gateway): a wake after an agent eviction reuses the session-context pin · other →
5ba9d1f,51609d8 -
#132290 fix(gateway): rehydrate context pin for internal wakes after eviction (fixes #131031) · superseded by another PR →
3bc8fb2,7533bd2,f5a9361,620ceb8,5ba9d1f,357f51c,cebeaef,69c1276,#131031,#131032,#172554,#126167,#127208,#126137,#131118
Closed issues · 1
- Closed#131031[Bug]: gateway: an internal wake after /stop, /undo or /model re-renders the session-context prompt and breaks the prefix cache twice (A→B→A)
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structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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
- gateway
- Merged PRs
- #139865
- Closed issues
- 1
- Attempts
- 2 PRs closed without merging
- Fix link checked
- 16 Oct 2026