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50c35dcabe
Three independent fixes: 1. Reset activity timestamp on cached agent reuse (#9051) When the gateway reuses a cached AIAgent for a new turn, the _last_activity_ts from the previous turn (possibly hours ago) carried over. The inactivity timeout handler immediately saw the agent as idle for hours and killed it. Fix: reset _last_activity_ts, _last_activity_desc, and _api_call_count when retrieving an agent from the cache. 2. Detect uv-managed virtual environments (#8620 sub-issue 1) The systemd unit generator fell back to sys.executable (uv's standalone Python) when running under 'uv run', because sys.prefix == sys.base_prefix (uv doesn't set up traditional venv activation). The generated ExecStart pointed to a Python binary without site-packages, crashing the service on startup. Fix: check VIRTUAL_ENV env var before falling back to sys.executable. uv sets VIRTUAL_ENV even when sys.prefix doesn't reflect the venv. 3. Nudge model to continue after empty post-tool response (#9400) Weaker models (GLM-5, mimo-v2-pro) sometimes return empty responses after tool calls instead of continuing to the next step. The agent silently abandoned the remaining work with '(empty)' or used prior-turn fallback text. Fix: when the model returns empty after tool calls AND there's no prior-turn content to fall back on, inject a one-time user nudge message telling the model to process the tool results and continue. The flag resets after each successful tool round so it can fire again on later rounds. Test plan: 97 gateway + CLI tests pass, 9 venv detection tests pass