lint: ruff-clean testbed (blocking file write to thread, unused vars)

.opencode/session-goal.md

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+# Session Goal
+
+реализуй полностью. автономно
+
+## Plan
+1. Read protocol spec (docs/aicc-core.md) and testbed design (docs/testbed-design.md)
+2. Inspect aicc-py SDK at ~/Desktop/aicc-py
+3. Build testbed bridge skeleton (world, capsule, bridge with tools)
+4. Implement tools: proprioception, vision, move, turn, look_at, interact
+5. Add headless rendering for vision frames
+6. Write agent demo loop
+7. Run conformance suite (9/9 green)
+8. Verify demo end-to-end, write README, commit per milestone
+
+## Progress
+- DONE: world engine (room, capsule physics/collision, beacon, audio) — testbed/room/world.py
+- DONE: headless raycaster renderer (vision 160x120 + aligned depth grid) — testbed/room/render.py
+- DONE: RoomBridge with all world tools + echo/boom/bump — testbed/bridge.py
+- DONE: conformance runner — 9/9 green against testbed bridge (testbed/conformance.py)
+- DONE: commits for skeleton + bridge milestones
+- NEXT: unit tests (world/render/bridge), demo agent loop (ollama LLM + scripted fallback), README, setup.sh, BUILDLOG