Gemini 3.8 Flash (effort medium · thinking on) on Animate a metronome that ticks a repeating two-tempo pattern in one self-contained HTML file
GGemini 3.8 Flashmedium · thinking on · Antigravity CLI 1.4.6 (agy -p) · cloud · 2026-10-23 · by @bobsiopener
- Estimated cost
- $0.40
- Wall time
- 3m
- Human step-ins
- 0
- Outcome
- Pass
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Summary
Exact prompt
# Animate a metronome that ticks a repeating two-tempo pattern in one self-contained HTML file Make a small animated scene: a metronome. Write one file, `out/scene.html`, that works opened straight from disk with no network access. `spec.json` gives the page title, the stage size and the scene parameters. **Looks are not scored**: the page is opened in a headless browser (800x600 window, UTC time zone, network blocked) and checked by objective tests only. ## Scene contract - Draw the scene on one `<canvas>` or `<svg>` stage of `width` x `height` CSS pixels (spec.json), visible on load, with `<title>` containing spec.json `title`. - Animate continuously from load (`requestAnimationFrame` or timers); no click is needed unless stated below. - Expose `window.sceneState()`, returning the scene's current state in stage pixel coordinates (origin top-left of the stage): `{beats: <integer number of beats completed>, angle_deg: <arm angle, positive to the right>}`. Extra fields are fine. It must describe what is actually drawn. - Time 0 is `performance.now()` 0 (seconds = `performance.now()` / 1000). The tempo follows `pattern` in order: `beats` beats at the first `bpm`, then `beats` beats at the next, then the pattern repeats. A beat lasts 60 / bpm seconds, and the count starts at 0 before the first beat completes. The arm is at +`amplitude_deg` at time 0 and reaches the opposite side at each completed beat. `sceneState()` must return the state at the moment it is called. - The page must log no errors and throw no exceptions. Keep the file at most 200,000 bytes; no external scripts, fonts, images or URLs (inline everything). ## Checks (partial credit = share passed) 1. `self_contained`: `out/scene.html` exists, is at most 200,000 bytes, references no http(s) or protocol-relative URL, and requests nothing from the network when opened. 2. `has_canvas_or_svg`: a visible `<canvas>` or `<svg>` of at least 300x200 CSS pixels is on the page. 3. `frames_change`: over 3 s, some later screenshot differs from the first in at least 0.1% of pixels, and at least 3 of 30 screenshots differ. 4. `beat_count`: at every sample `sceneState().beats` equals the number of beats completed since time 0 under spec.json `pattern` (a 30 ms margin either side of a beat is allowed). 5. `arm_follows_beats`: at every sample `angle_deg` is within 4° of `amplitude_deg` × cos(π × b), where b is the fractional number of beats since time 0. 6. `no_console_errors`: no uncaught exception, `console.error` or browser error is logged during the run. ## How this run works - Work on your own: nobody will answer questions in this task, and writing to `ask/` counts against the run. - Write only under `out/`. Create `out/` if it is missing. Inputs are synthetic; don't fetch anything from the network. - Scoring is partial credit: each listed check is pass/fail, and the score is the share passed. Numbers are compared to within 0.005 unless the task says otherwise.
Original benchmark task written for usecaserank.com. Headless, offline run on a reproducible fixture. Cost shown is a list-price API-equivalent estimate (run on a Google account via Antigravity CLI, not billed per token).
Success criteria: self_contained has_canvas_or_svg frames_change beat_count arm_follows_beats no_console_errors
Setup notes: batch30 case o08-metronome-tempo-pattern (offline fixture). Prepared with batch30/prepare.sh on the shared box; only TASK.md + starting files went to the agent machine, hidden keys stayed on the box. Prompt = TASK.md verbatim. Flags: -p --model gemini-3.8-flash-medium --sandbox --dangerously-skip-permissions --disable-slash-commands --output-format stream-json, cwd=workdir. Scored on the box with `MEDIA_DIR=<dir> python3 score.py WORKDIR KEYDIR`. Single run, no retries, no human input. Gallery media (3 s headless-Chrome capture: poster.png + clip.mp4, network blocked) written to a fresh MEDIA_DIR by the scorer; SHA-256 in evidence.media. Autonomous case (seed 1586925717): no stand-in user; any ask/ file counts as an intervention and blocks a pass. Requested model gemini-3.8-flash-medium (effort medium); priced at the base model row gemini-3.8-flash (pricing.json, https://ai.google.dev/gemini-api/docs/pricing). Score: 6/6. Cost is an ESTIMATE: measured tokens x pricing.json list price (Google account, nothing billed per token); output_tokens include thinking tokens. Tool calls 28 (0 failed). Single run.
Estimated cost List-price estimate; not actually billed.
Output
Metrics
- Estimated cost
- $0.40
- Wall time
- 3m
- Human step-ins
- 0
- Turns
- 29
| Model | Input tok | Output tok | Cost |
|---|---|---|---|
| GGemini 3.8 Flashgoogle/gemini-3.8-flasheffort medium · thinking on | 1,165,486 | 47,680 | $0.40 |
Reproduce this run
- Use the use case prompt on the use case page.
- Same setup: Gemini 3.8 Flash (google/gemini-3.8-flash, effort medium · thinking on) via
Antigravity CLI 1.4.6 (agy -p), cloud. - It counts as a success only if it meets every success criterion: self_contained has_canvas_or_svg frames_change beat_count arm_follows_beats no_console_errors
- Log model, tokens, wall time, human step-ins and the evidence log, then submit it as a reproduction. A different model? Submit a head-to-head rerun.
How runs are scored: Methodology.
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Automated checks
Trust 80% comes from these checks (how Trust % works).
- Run date is not in the future : passed
- Model is in the dated pricing table : passed
- Cost recomputed from tokens matches : passed
- Cached tokens are consistent : passed
- Output throughput is plausible : passed
- Autonomy matches step-ins : passed
- Step-ins do not exceed turns : passed
- Retries agree with first-try result : passed
- Evidence log SHA-256 matches : passed
- Evidence log is substantial : passed
Evidence log
{"event": "init", "conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "init": {"model": "gemini-3.8-flash-medium", "cwd": "/home/bob/usecase-runs/b2930/out/agy/gemini-3.8-flash-medium/b30o08/work", "tools": ["ask_custom_permission", "ask_permission", "ask_question", "browser_click_element", "browser_drag_pixel_to_pixel", "browser_get_dom", "browser_get_network_request", "browser_input", "browser_list_network_requests", "browser_mouse_down", "browser_mouse_up", "browser_move_mouse", "browser_press_key", "browser_refresh_page", "browser_resize_window", "browser_scroll", "browser_scroll_dom", "browser_select_option", "browser_subagent", "call_mcp_tool", "capture_browser_console_logs", "capture_browser_screenshot", "click_browser_pixel", "command_status", "define_subagent", "delete_knowledge", "execute_browser_javascript", "find_by_name", "finish", "generate_image", "grep_search", "invoke_subagent", "list_browser_pages", "list_dir", "list_permissions", "list_plugin_accounts", "list_resources", "manage_inbox", "manage_subagents", "manage_task", "multi_replace_file_content", "notebook_edit", "notebook_execution", "open_browser_url", "read_browser_page", "read_resource", "read_url_content", "replace_file_content", "run_command", "run_workflow", "schedule", "search_marketplace", "search_web", "sed_file", "send_command_input", "send_message", "view_file", "wait", "wait_5_seconds", "write_to_file"], "permission_mode": "always-proceed"}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 0, "state": "DONE", "step_type": "user_input"}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 1, "state": "DONE", "step_type": "agent_response", "duration_seconds": 1.485891829, "usage": {"input_tokens": 8701, "output_tokens": 80, "thinking_tokens": 41, "cache_read_tokens": 0, "total_tokens": 8781}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 2, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "ls -la"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 2, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.309207177, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "ls -la"}, "output": "Command exited with code 0.\n\nCommand output:\ntotal 24\r\ndrwxr-xr-x 4 bob bob 4096 Oct 23 05:55 .\r\ndrwxrwxr-x 3 bob bob 4096 Oct 23 07:10 ..\r\n-rw-r--r-- 1 bob bob 2969 Oct 23 05:55 TASK.md\r\ndrwxr-xr-x 2 bob bob 4096 Oct 23 05:55 ask\r\ndrwxr-xr-x 2 bob bob 4096 Oct 23 05:55 out\r\n-rw-r--r-- 1 bob bob 202 Oct 23 05:55 spec.json\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 3, "state": "DONE", "step_type": "agent_response", "duration_seconds": 1.2423900190000001, "usage": {"input_tokens": 9037, "output_tokens": 73, "thinking_tokens": 15, "cache_read_tokens": 0, "total_tokens": 9110}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 4, "state": "ACTIVE", "step_type": "tool", "tool_name": "read_file", "tool_info": {"name": "read_file", "parameters": {"Path": "/home/bob/usecase-runs/b2930/out/agy/gemini-3.8-flash-medium/b30o08/work/spec.json"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 4, "state": "DONE", "step_type": "tool", "tool_name": "read_file", "duration_seconds": 0.029047463, "tool_info": {"name": "read_file", "parameters": {"Path": "/home/bob/usecase-runs/b2930/out/agy/gemini-3.8-flash-medium/b30o08/work/spec.json"}, "output": "17 lines, 202 bytes"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 5, "state": "DONE", "step_type": "agent_response", "duration_seconds": 2.120610091, "usage": {"input_tokens": 9360, "output_tokens": 77, "thinking_tokens": 19, "cache_read_tokens": 0, "total_tokens": 9437}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 6, "state": "ACTIVE", "step_type": "tool", "tool_name": "read_file", "tool_info": {"name": "read_file", "parameters": {"Path": "/home/bob/usecase-runs/b2930/out/agy/gemini-3.8-flash-medium/b30o08/work/TASK.md"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 6, "state": "DONE", "step_type": "tool", "tool_name": "read_file", "duration_seconds": 0.039966432, "tool_info": {"name": "read_file", "parameters": {"Path": "/home/bob/usecase-runs/b2930/out/agy/gemini-3.8-flash-medium/b30o08/work/TASK.md"}, "output": "23 lines, 2969 bytes"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 7, "state": "DONE", "step_type": "agent_response", "duration_seconds": 2.7428401989999998, "usage": {"input_tokens": 10385, "output_tokens": 630, "thinking_tokens": 589, "cache_read_tokens": 0, "total_tokens": 11015}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 8, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "git status || ls -la .."}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 8, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.270021565, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "git status || ls -la .."}, "output": "Command exited with code 0.\n\nCommand output:\nfatal: not a git repository (or any parent up to mount point /)\r\nStopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).\r\ntotal 24\r\ndrwxrwxr-x 3 bob bob 4096 Oct 23 07:10 .\r\ndrwxrwxr-x 18 bob bob 4096 Oct 23 07:10 ..\r\n-rw-rw-r-- 1 bob bob 5260 Oct 23 07:11 events.jsonl\r\n-rw-rw-r-- 1 bob bob 103 Oct 23 07:10 meta.txt\r\n-rw-rw-r-- 1 bob bob 0 Oct 23 07:10 stderr.txt\r\ndrwxr-xr-x 4 bob bob 4096 Oct 23 05:55 work\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 9, "state": "DONE", "step_type": "agent_response", "duration_seconds": 2.804823213, "usage": {"input_tokens": 11309, "output_tokens": 64, "thinking_tokens": 24, "cache_read_tokens": 0, "total_tokens": 11373}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 10, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "cat ../meta.txt"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 10, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.297846641, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "cat ../meta.txt"}, "output": "Command exited with code 0.\n\nCommand output:\nagy=1.4.6\r\nmodel_requested=gemini-3.8-flash-medium\r\nstart=1792753852.385072724 2026-10-23T07:10:52-04:00\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 11, "state": "DONE", "step_type": "agent_response", "duration_seconds": 10.56857718, "usage": {"input_tokens": 11530, "output_tokens": 4097, "thinking_tokens": 3685, "cache_read_tokens": 0, "total_tokens": 15627}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 12, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst spec = JSON.parse(require(\"fs\").readFileSync(\"spec.json\"));\nfunction getBeatsAtTime(t) {\n if (t <= 0) return 0;\n let cycleDuration = 0;\n let cycleBeats = 0;\n for (const p of spec.pattern) {\n cycleDuration += p.beats * 60 / p.bpm;\n cycleBeats += p.beats;\n }\n const cycles = Math.floor(t / cycleDuration);\n let remTime = t - cycles * cycleDuration;\n let b = cycles * cycleBeats;\n for (let i = 0; i < spec.pattern.length; i++) {\n const p = spec.pattern[i];\n const dur = p.beats \u2026"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 12, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.336824152, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst spec = JSON.parse(require(\"fs\").readFileSync(\"spec.json\"));\nfunction getBeatsAtTime(t) {\n if (t <= 0) return 0;\n let cycleDuration = 0;\n let cycleBeats = 0;\n for (const p of spec.pattern) {\n cycleDuration += p.beats * 60 / p.bpm;\n cycleBeats += p.beats;\n }\n const cycles = Math.floor(t / cycleDuration);\n let remTime = t - cycles * cycleDuration;\n let b = cycles * cycleBeats;\n for (let i = 0; i < spec.pattern.length; i++) {\n const p = spec.pattern[i];\n const dur = p.beats \u2026"}, "output": "Command exited with code 0.\n\nCommand output:\nt=0.00 b=0.0000 beats=0 angle=25.00\r\nt=0.25 b=0.7500 beats=0 angle=-17.68\r\nt=0.50 b=1.5000 beats=1 angle=-0.00\r\nt=0.75 b=2.2917 beats=2 angle=15.22\r\nt=1.00 b=3.1667 beats=3 angle=-21.65\r\nt=1.25 b=4.0417 beats=4 angle=24.79\r\nt=1.50 b=4.9167 beats=4 angle=-24.15\r\nt=1.75 b=5.6786 beats=5 angle=13.30\r\nt=2.00 b=6.4286 beats=6 angle=5.56\r\nt=2.25 b=7.2083 beats=7 angle=-19.83\r\nt=2.50 b=8.0833 beats=8 angle=24.15\r\nt=2.75 b=8.9583 beats=8 angle=-24.79\r\nt=3.00 b=9.8333 beats=9 angle=21.65\r\nt=3.25 b=10.6071 beats=10 angle=-8.26\r\nt=3.50 b=11.3571 beats=11 angle=-10.85\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 13, "state": "DONE", "step_type": "agent_response", "duration_seconds": 19.511226333, "usage": {"input_tokens": 16088, "output_tokens": 6811, "thinking_tokens": 6208, "cache_read_tokens": 0, "total_tokens": 22899}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 14, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst spec = JSON.parse(require(\"fs\").readFileSync(\"spec.json\"));\n\nfunction getBeatsAtTime(t) {\n if (t <= 0) return 0;\n let cycleDuration = 0;\n let cycleBeats = 0;\n for (const p of spec.pattern) {\n cycleDuration += p.beats * 60 / p.bpm;\n cycleBeats += p.beats;\n }\n const cycles = Math.floor(t / cycleDuration);\n let remTime = t - cycles * cycleDuration;\n let b = cycles * cycleBeats;\n for (let i = 0; i < spec.pattern.length; i++) {\n const p = spec.pattern[i];\n const dur = p.beats\u2026"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 14, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.326234337, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst spec = JSON.parse(require(\"fs\").readFileSync(\"spec.json\"));\n\nfunction getBeatsAtTime(t) {\n if (t <= 0) return 0;\n let cycleDuration = 0;\n let cycleBeats = 0;\n for (const p of spec.pattern) {\n cycleDuration += p.beats * 60 / p.bpm;\n cycleBeats += p.beats;\n }\n const cycles = Math.floor(t / cycleDuration);\n let remTime = t - cycles * cycleDuration;\n let b = cycles * cycleBeats;\n for (let i = 0; i < spec.pattern.length; i++) {\n const p = spec.pattern[i];\n const dur = p.beats\u2026"}, "output": "Command exited with code 0.\n\nCommand output:\nAll 10 cycles tested perfectly!\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 15, "state": "DONE", "step_type": "agent_response", "duration_seconds": 17.350408951, "usage": {"input_tokens": 22993, "output_tokens": 6716, "thinking_tokens": 6167, "cache_read_tokens": 0, "total_tokens": 29709}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 16, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst spec = JSON.parse(require(\"fs\").readFileSync(\"spec.json\"));\n\nfunction getBeatsAtTime(t) {\n if (t <= 0) return 0;\n let cycleDuration = 0;\n let cycleBeats = 0;\n for (const p of spec.pattern) {\n cycleDuration += p.beats * 60 / p.bpm;\n cycleBeats += p.beats;\n }\n const cycles = Math.floor(t / cycleDuration);\n let remTime = t - cycles * cycleDuration;\n let b = cycles * cycleBeats;\n for (let i = 0; i < spec.pattern.length; i++) {\n const p = spec.pattern[i];\n const dur = p.beats\u2026"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 16, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.331730453, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst spec = JSON.parse(require(\"fs\").readFileSync(\"spec.json\"));\n\nfunction getBeatsAtTime(t) {\n if (t <= 0) return 0;\n let cycleDuration = 0;\n let cycleBeats = 0;\n for (const p of spec.pattern) {\n cycleDuration += p.beats * 60 / p.bpm;\n cycleBeats += p.beats;\n }\n const cycles = Math.floor(t / cycleDuration);\n let remTime = t - cycles * cycleDuration;\n let b = cycles * cycleBeats;\n for (let i = 0; i < spec.pattern.length; i++) {\n const p = spec.pattern[i];\n const dur = p.beats\u2026"}, "output": "Command exited with code 0.\n\nCommand output:\nContinuity test finished successfully!\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 17, "state": "DONE", "step_type": "agent_response", "duration_seconds": 7.246543427, "usage": {"input_tokens": 9434, "output_tokens": 2161, "thinking_tokens": 2116, "cache_read_tokens": 20367, "total_tokens": 11595}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 18, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "which google-chrome chromium chromium-browser node python3"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 18, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.280491791, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "which google-chrome chromium chromium-browser node python3"}, "output": "Command exited with code 1.\n\nCommand output:\n/usr/bin/google-chrome\r\n/home/bob/.nvm/versions/node/v26.8.1/bin/node\r\n/usr/bin/python3\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 19, "state": "DONE", "step_type": "agent_response", "duration_seconds": 2.479545274, "usage": {"input_tokens": 3571, "output_tokens": 140, "thinking_tokens": 29, "cache_read_tokens": 28517, "total_tokens": 3711}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 20, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e 'require(\"puppeteer\")' 2>/dev/null && echo \"puppeteer found\" || node -e 'require(\"playwright\")' 2>/dev/null && echo \"playwright found\" || python3 -c 'import playwright' 2>/dev/null && echo \"py-playwright found\" || echo \"none\""}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 20, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.438002453, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e 'require(\"puppeteer\")' 2>/dev/null && echo \"puppeteer found\" || node -e 'require(\"playwright\")' 2>/dev/null && echo \"playwright found\" || python3 -c 'import playwright' 2>/dev/null && echo \"py-playwright found\" || echo \"none\""}, "output": "Command exited with code 0.\n\nCommand output:\nnone\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 21, "state": "DONE", "step_type": "agent_response", "duration_seconds": 1.581765335, "usage": {"input_tokens": 3806, "output_tokens": 76, "thinking_tokens": 17, "cache_read_tokens": 28509, "total_tokens": 3882}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 22, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "python3 -c 'import selenium' 2>/dev/null && echo \"selenium found\" || echo \"no selenium\""}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 22, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.463970857, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "python3 -c 'import selenium' 2>/dev/null && echo \"selenium found\" || echo \"no selenium\""}, "output": "Command exited with code 0.\n\nCommand output:\nno selenium\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 23, "state": "DONE", "step_type": "agent_response", "duration_seconds": 3.529853683, "usage": {"input_tokens": 3978, "output_tokens": 142, "thinking_tokens": 103, "cache_read_tokens": 28501, "total_tokens": 4120}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 24, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "google-chrome --version"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 24, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.328218013, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "google-chrome --version"}, "output": "Command exited with code 0.\n\nCommand output:\nGoogle Chrome 152.0.7977.75 \r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 25, "state": "DONE", "step_type": "agent_response", "duration_seconds": 23.102218559, "usage": {"input_tokens": 4230, "output_tokens": 8706, "thinking_tokens": 8115, "cache_read_tokens": 28494, "total_tokens": 12936}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 26, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "cat << 'EOF' > test_script.js\nconst fs = require('fs');\n\nconst spec = JSON.parse(fs.readFileSync('spec.json'));\n\nfunction getBeatsAtTime(t) {\n if (t <= 0) return 0;\n let cycleDuration = 0;\n let cycleBeats = 0;\n for (let i = 0; i < spec.pattern.length; i++) {\n cycleDuration += spec.pattern[i].beats * 60 / spec.pattern[i].bpm;\n cycleBeats += spec.pattern[i].beats;\n }\n if (cycleDuration <= 0) return 0;\n\n const cycles = Math.floor(t / cycleDuration);\n let remTime = t - cycles * cycleDuration;\n le\u2026"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 26, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.411404629, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "cat << 'EOF' > test_script.js\nconst fs = require('fs');\n\nconst spec = JSON.parse(fs.readFileSync('spec.json'));\n\nfunction getBeatsAtTime(t) {\n if (t <= 0) return 0;\n let cycleDuration = 0;\n let cycleBeats = 0;\n for (let i = 0; i < spec.pattern.length; i++) {\n cycleDuration += spec.pattern[i].beats * 60 / spec.pattern[i].bpm;\n cycleBeats += spec.pattern[i].beats;\n }\n if (cycleDuration <= 0) return 0;\n\n const cycles = Math.floor(t / cycleDuration);\n let remTime = t - cycles * cycleDuration;\n le\u2026"}, "output": "Command exited with code 1.\n\nThere were sandbox errors that may or may not be related to the failure. If you think the failure is because of running in the sandbox, you can run the command again with `BypassSandbox` set to true to request explicit user permission.\n\nCommand output:\nbash: line 1: test_script.js: Read-only file system\r\nnode:internal/modules/cjs/loader:1573\r\n throw err;\r\n ^\r\n\r\nError: Cannot find module '/home/bob/usecase-runs/b2930/out/agy/gemini-3.8-flash-medium/b30o08/work/test_script.js'\r\n at Module._resolveFilename (node:internal/modules/cjs/loader:1569:15)\r\n at wrapResolveFilename (node:internal/modules/cjs/loader:1123:27)\r\n at defaultResolveImplForCJSLoading (node:internal/modules/cjs/loader:1147:10)\r\n at resolveForCJSWithHooks (node:internal/modules/cjs/loader:1174:12)\r\n at Module._load (node:internal/modules/cjs/loader:1346:5)\r\n at wrapModuleLoad (node:internal/modules/cjs/loader:261:19)\r\n at Module.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:154:5)\r\n at node:internal/main/run_main_module:33:47 {\r\n code: 'MODULE_NOT_FOUND',\r\n requireStack: []\r\n}\r\n\r\nNode.js v26.8.1\r\nrm: cannot remove 'test_script.js': No such file or directory\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 27, "state": "DONE", "step_type": "agent_response", "duration_seconds": 1.752767406, "usage": {"input_tokens": 9311, "output_tokens": 122, "thinking_tokens": 83, "cache_read_tokens": 32601, "total_tokens": 9433}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 28, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "ls -ld out"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 28, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.275145861, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "ls -ld out"}, "output": "Command exited with code 0.\n\nCommand output:\ndrwxr-xr-x 2 bob bob 4096 Oct 23 05:55 out\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 29, "state": "DONE", "step_type": "agent_response", "duration_seconds": 15.310843715, "usage": {"input_tokens": 5477, "output_tokens": 8297, "thinking_tokens": 4081, "cache_read_tokens": 36669, "total_tokens": 13774}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 30, "state": "ACTIVE", "step_type": "tool", "tool_name": "write_file", "tool_info": {"name": "write_file", "parameters": {"Path": "/home/bob/usecase-runs/b2930/out/agy/gemini-3.8-flash-medium/b30o08/work/out/scene.html"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 30, "state": "DONE", "step_type": "tool", "tool_name": "write_file", "duration_seconds": 0.040668103, "tool_info": {"name": "write_file", "parameters": {"Path": "/home/bob/usecase-runs/b2930/out/agy/gemini-3.8-flash-medium/b30o08/work/out/scene.html"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 31, "state": "DONE", "step_type": "agent_response", "duration_seconds": 2.077651243, "usage": {"input_tokens": 9748, "output_tokens": 282, "thinking_tokens": 97, "cache_read_tokens": 40771, "total_tokens": 10030}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 32, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst fs = require(\"fs\");\nconst content = fs.readFileSync(\"out/scene.html\", \"utf8\");\nconsole.log(\"File size in bytes:\", Buffer.byteLength(content, \"utf8\"));\nconst hasHttp = /https?:/i.test(content);\nconst hasProtocolRelative = /\\/\\//.test(content.replace(/\\/\\*[\\s\\S]*?\\*\\//g, \"\").replace(/\\/\\/.*$/gm, \"\")); // check outside comments\nconsole.log(\"Contains http(s):\", hasHttp);\nconst matches = content.match(/https?:|\\/\\//g);\nconsole.log(\"Matches:\", matches);\n'"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 32, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.298382184, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst fs = require(\"fs\");\nconst content = fs.readFileSync(\"out/scene.html\", \"utf8\");\nconsole.log(\"File size in bytes:\", Buffer.byteLength(content, \"utf8\"));\nconst hasHttp = /https?:/i.test(content);\nconst hasProtocolRelative = /\\/\\//.test(content.replace(/\\/\\*[\\s\\S]*?\\*\\//g, \"\").replace(/\\/\\/.*$/gm, \"\")); // check outside comments\nconsole.log(\"Contains http(s):\", hasHttp);\nconst matches = content.match(/https?:|\\/\\//g);\nconsole.log(\"Matches:\", matches);\n'"}, "output": "Command exited with code 0.\n\nCommand output:\nFile size in bytes: 11561\r\nContains http(s): false\r\nMatches: [\r\n '//', '//', '//', '//',\r\n '//', '//', '//', '//',\r\n '//', '//', '//', '//',\r\n '//', '//', '//', '//',\r\n '//', '//', '//', '//',\r\n '//'\r\n]\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 33, "state": "DONE", "step_type": "agent_response", "duration_seconds": 2.096990849, "usage": {"input_tokens": 2054, "output_tokens": 348, "thinking_tokens": 284, "cache_read_tokens": 48917, "total_tokens": 2402}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 34, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "google-chrome --headless=new --dump-dom --disable-gpu out/scene.html | head -n 30"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 34, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.460844074, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "google-chrome --headless=new --dump-dom --disable-gpu out/scene.html | head -n 30"}, "output": "Command exited with code 0.\n\nCommand output:\n[35:35:1023/071254.985013:FATAL:sandbox/linux/services/credentials.cc:131] Check failed: . : Function not implemented (38)\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 35, "state": "DONE", "step_type": "agent_response", "duration_seconds": 1.417546961, "usage": {"input_tokens": 2550, "output_tokens": 91, "thinking_tokens": 21, "cache_read_tokens": 48910, "total_tokens": 2641}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 36, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "google-chrome --headless=new --no-sandbox --disable-gpu --dump-dom out/scene.html | head -n 30"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 36, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.93488161, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "google-chrome --headless=new --no-sandbox --disable-gpu --dump-dom out/scene.html | head -n 30"}, "output": "Command exited with code 0.\n\nCommand output:\n[33:55:1023/071256.867512:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.870: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.870: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.871: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.871: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.871: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.871: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.871: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.871: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.872: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.872: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.872: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.872: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.872: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n[33:55:1023/071256.873057:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Could not parse server address: Unknown address type (examples of valid types are \"tcp\" and on UNIX \"unix\")\r\n[33:55:1023/071256.873142:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory\r\n[33:55:1023/071256.873213:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory\r\n[33:55:1023/071256.873311:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Could not parse server address: Unknown address type (examples of valid types are \"tcp\" and on UNIX \"unix\")\r\n[33:55:1023/071256.890152:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Could not parse server address: Unknown address type (examples of valid types are \"tcp\" and on UNIX \"unix\")\r\n[33:55:1023/071256.915636:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Could not parse server address: Unknown address type (examples of valid types are \"tcp\" and on UNIX \"unix\")\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.916: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.919: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(process:33): dconf-CRITICAL **: 07:12:56.928: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n[33:33:1023/071256.970175:ERROR:dbus/object_proxy.cc:572] Failed to call method: org.freedesktop.DBus.NameHasOwner: object_path= /org/freedesktop/DBus: unknown error type: \r\n[33:33:1023/071256.970271:ERROR:dbus/object_proxy.cc:572] Failed to call method: org.freedesktop.DBus.NameHasOwner: object_path= /org/freedesktop/DBus: unknown error type: \r\n[33:55:1023/071256.970280:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Could not parse server address: Unknown address type (examples of valid types are \"tcp\" and on UNIX \"unix\")\r\n[33:55:1023/071256.970292:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Could not parse server address: Unknown address type (examples of valid types are \"tcp\" and on UNIX \"unix\")\r\n[33:33:1023/071256.970454:ERROR:dbus/object_proxy.cc:572] Failed to call method: org.freedesktop.DBus.NameHasOwner: object_path= /org/freedesktop/DBus: unknown error type: \r\n[33:33:1023/071256.971488:ERROR:dbus/object_proxy.cc:572] Failed to call method: org.freedesktop.DBus.NameHasOwner: object_path= /org/freedesktop/DBus: unknown error type: \r\n[33:33:1023/071257.001533:ERROR:dbus/object_proxy.cc:572] Failed to call method: org.freedesktop.DBus.NameHasOwner: object_path= /org/freedesktop/DBus: unknown error type: \r\n[33:33:1023/071257.002596:ERROR:dbus/object_proxy.cc:572] Failed to call method: org.freedesktop.DBus.NameHasOwner: object_path= /org/freedesktop/DBus: unknown error type: \r\n[33:55:1023/071257.003750:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory\r\n[33:55:1023/071257.003834:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Failed to connect to socket /run/dbus/system_bus_socket: No such file or directory\r\n[33:55:1023/071257.003876:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Could not parse server address: Unknown address type (examples of valid types are \"tcp\" and on UNIX \"unix\")\r\n[33:33:1023/071257.032289:ERROR:dbus/object_proxy.cc:572] Failed to call method: org.freedesktop.DBus.Properties.GetAll: object_path= /org/freedesktop/UPower/devices/DisplayDevice: unknown error type: \r\n[33:33:1023/071257.032389:ERROR:dbus/object_proxy.cc:572] Failed to call method: org.freedesktop.DBus.NameHasOwner: object_path= /org/freedesktop/DBus: unknown error type: \r\n[33:55:1023/071257.032467:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Could not parse server address: Unknown address type (examples of valid types are \"tcp\" and on UNIX \"unix\")\r\n[33:33:1023/071257.056208:ERROR:dbus/object_proxy.cc:572] Failed to call method: org.freedesktop.DBus.NameHasOwner: object_path= /org/freedesktop/DBus: unknown error type: \r\n[33:55:1023/071257.056289:ERROR:dbus/bus.cc:405] Failed to connect to the bus: Could not parse server address: Unknown address type (examples of valid types are \"tcp\" and on UNIX \"unix\")\r\n[33:33:1023/071257.071865:ERROR:dbus/object_proxy.cc:572] Failed to call method: org.freedesktop.DBus.NameHasOwner: object_path= /org/freedesktop/DBus: unknown error type: \r\n\r\n(google-chrome:33): dconf-CRITICAL **: 07:12:57.173: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(google-chrome:33): dconf-CRITICAL **: 07:12:57.174: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(google-chrome:33): dconf-CRITICAL **: 07:12:57.179: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n\r\n(google-chrome:33): dconf-CRITICAL **: 07:12:57.220: unable to create directory '/run/user/1000/dconf': Read-only file system. dconf will not work properly.\r\n<!DOCTYPE html>\r\n<html lang=\"en\"><head>\r\n <meta charset=\"utf-8\">\r\n <title>Metronome 596</title>\r\n <style>\r\n * {\r\n box-sizing: border-box;\r\n margin: 0;\r\n padding: 0;\r\n }\r\n body {\r\n background-color: #121214;\r\n display: flex;\r\n justify-content: center;\r\n align-items: center;\r\n min-height: 100vh;\r\n overflow: hidden;\r\n font-family: system-ui, -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, sans-serif;\r\n }\r\n #stage {\r\n display: block;\r\n width: 700px;\r\n height: 450px;\r\n background: #141416;\r\n border-radius: 6px;\r\n box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6);\r\n }\r\n </style>\r\n</head>\r\n<body>\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 37, "state": "DONE", "step_type": "agent_response", "duration_seconds": 2.2854083960000002, "usage": {"input_tokens": 5950, "output_tokens": 365, "thinking_tokens": 71, "cache_read_tokens": 48916, "total_tokens": 6315}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 38, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst http = require(\"http\");\nconst { spawn } = require(\"child_process\");\n\nconst chrome = spawn(\"google-chrome\", [\n \"--headless=new\",\n \"--no-sandbox\",\n \"--disable-gpu\",\n \"--remote-debugging-port=9222\",\n \"file://\" + process.cwd() + \"/out/scene.html\"\n]);\n\nchrome.stderr.on(\"data\", d => {});\n\nsetTimeout(async () => {\n try {\n http.get(\"http://127.0.0.1:9222/json\", (res) => {\n let data = \"\";\n res.on(\"data\", chunk => data += chunk);\n res.on(\"end\", () => {\n const list = JSON\u2026"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 38, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 1.882032363, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst http = require(\"http\");\nconst { spawn } = require(\"child_process\");\n\nconst chrome = spawn(\"google-chrome\", [\n \"--headless=new\",\n \"--no-sandbox\",\n \"--disable-gpu\",\n \"--remote-debugging-port=9222\",\n \"file://\" + process.cwd() + \"/out/scene.html\"\n]);\n\nchrome.stderr.on(\"data\", d => {});\n\nsetTimeout(async () => {\n try {\n http.get(\"http://127.0.0.1:9222/json\", (res) => {\n let data = \"\";\n res.on(\"data\", chunk => data += chunk);\n res.on(\"end\", () => {\n const list = JSON\u2026"}, "output": "Command exited with code 0.\n\nCommand output:\nPages: [\r\n {\r\n title: 'Google Hangouts',\r\n url: 'chrome-extension://nkeimhogjdpnpccoofpliimaahmaaome/background.html'\r\n },\r\n {\r\n title: 'Google Hangouts',\r\n url: 'chrome-extension://nkeimhogjdpnpccoofpliimaahmaaome/background.html'\r\n },\r\n {\r\n title: 'Metronome 596',\r\n url: 'file:///home/bob/usecase-runs/b2930/out/agy/gemini-3.8-flash-medium/b30o08/work/out/scene.html'\r\n },\r\n { title: 'Omnibox Popup', url: 'chrome://omnibox-popup.top-chrome/' },\r\n {\r\n title: 'Omnibox Popup',\r\n url: 'chrome://omnibox-popup.top-chrome/omnibox_popup_aim.html'\r\n },\r\n {\r\n title: 'Service Worker chrome-extension://fignfifoniblkonapihmkfakmlgkbkcf/service_worker.js',\r\n url: 'chrome-extension://fignfifoniblkonapihmkfakmlgkbkcf/service_worker.js'\r\n }\r\n]\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 39, "state": "DONE", "step_type": "agent_response", "duration_seconds": 2.783344904, "usage": {"input_tokens": 2632, "output_tokens": 782, "thinking_tokens": 80, "cache_read_tokens": 52986, "total_tokens": 3414}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 40, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst http = require(\"http\");\nconst { spawn } = require(\"child_process\");\n\nconst chrome = spawn(\"google-chrome\", [\n \"--headless=new\",\n \"--no-sandbox\",\n \"--disable-gpu\",\n \"--remote-debugging-port=9223\",\n \"file://\" + process.cwd() + \"/out/scene.html\"\n]);\n\nsetTimeout(async () => {\n http.get(\"http://127.0.0.1:9223/json\", async (res) => {\n let data = \"\";\n res.on(\"data\", chunk => data += chunk);\n res.on(\"end\", async () => {\n const list = JSON.parse(data);\n const page = list.find\u2026"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 40, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 3.948303786, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst http = require(\"http\");\nconst { spawn } = require(\"child_process\");\n\nconst chrome = spawn(\"google-chrome\", [\n \"--headless=new\",\n \"--no-sandbox\",\n \"--disable-gpu\",\n \"--remote-debugging-port=9223\",\n \"file://\" + process.cwd() + \"/out/scene.html\"\n]);\n\nsetTimeout(async () => {\n http.get(\"http://127.0.0.1:9223/json\", async (res) => {\n let data = \"\";\n res.on(\"data\", chunk => data += chunk);\n res.on(\"end\", async () => {\n const list = JSON.parse(data);\n const page = list.find\u2026"}, "output": "Command exited with code 0.\n\nCommand output:\nConnected to page via CDP!\r\nSample 0: {\"beats\":4,\"angle_deg\":10.458171486787046,\"b\":4.362616665999095,\"time\":1.3416999998092651,\"pivot_x\":350,\"pivot_y\":351,\"tip_x\":399.00976722586563,\"tip_y\":85.485324856673,\"x\":399.00976722586563,\"y\":85.485324856673}\r\nSample 1: {\"beats\":5,\"angle_deg\":12.247822629213582,\"b\":5.662971429143633,\"time\":1.744800000190735,\"pivot_x\":350,\"pivot_y\":351,\"tip_x\":407.277944445697,\"tip_y\":87.14542437153824,\"x\":407.277944445697,\"y\":87.14542437153824}\r\nSample 2: {\"beats\":6,\"angle_deg\":-22.902225196879048,\"b\":6.8686714279992245,\"time\":2.146699999809265,\"pivot_x\":350,\"pivot_y\":351,\"tip_x\":244.92687399743443,\"tip_y\":102.28402103594351,\"x\":244.92687399743443,\"y\":102.28402103594351}\r\nSample 3: {\"beats\":8,\"angle_deg\":17.188914338134328,\"b\":8.258683331330618,\"time\":2.5500999994277955,\"pivot_x\":350,\"pivot_y\":351,\"tip_x\":429.79126832312335,\"tip_y\":93.0593992807892,\"x\":429.79126832312335,\"y\":93.0593992807892}\r\nSample 4: {\"beats\":9,\"angle_deg\":12.74180580449087,\"b\":9.67023333199819,\"time\":2.9533999996185303,\"pivot_x\":350,\"pivot_y\":351,\"tip_x\":409.55064474738936,\"tip_y\":87.64905409288878,\"x\":409.55064474738936,\"y\":87.64905409288878}\r\nConsole errors recorded: []\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 41, "state": "DONE", "step_type": "agent_response", "duration_seconds": 3.997644224, "usage": {"input_tokens": 4383, "output_tokens": 1128, "thinking_tokens": 319, "cache_read_tokens": 52985, "total_tokens": 5511}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 42, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst http = require(\"http\");\nconst { spawn } = require(\"child_process\");\n\nconst chrome = spawn(\"google-chrome\", [\n \"--headless=new\",\n \"--no-sandbox\",\n \"--disable-gpu\",\n \"--window-size=800,600\",\n \"--remote-debugging-port=9224\",\n \"file://\" + process.cwd() + \"/out/scene.html\"\n]);\n\nsetTimeout(async () => {\n http.get(\"http://127.0.0.1:9224/json\", async (res) => {\n let data = \"\";\n res.on(\"data\", chunk => data += chunk);\n res.on(\"end\", async () => {\n const list = JSON.parse(data);\n \u2026"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 42, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 6.90987855, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst http = require(\"http\");\nconst { spawn } = require(\"child_process\");\n\nconst chrome = spawn(\"google-chrome\", [\n \"--headless=new\",\n \"--no-sandbox\",\n \"--disable-gpu\",\n \"--window-size=800,600\",\n \"--remote-debugging-port=9224\",\n \"file://\" + process.cwd() + \"/out/scene.html\"\n]);\n\nsetTimeout(async () => {\n http.get(\"http://127.0.0.1:9224/json\", async (res) => {\n let data = \"\";\n res.on(\"data\", chunk => data += chunk);\n res.on(\"end\", async () => {\n const list = JSON.parse(data);\n \u2026"}, "output": "Command exited with code 0.\n\nCommand output:\nDiffer count from first: 29/29\r\nAny differ by >0.1%: true\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 43, "state": "DONE", "step_type": "agent_response", "duration_seconds": 2.220303093, "usage": {"input_tokens": 5621, "output_tokens": 115, "thinking_tokens": 58, "cache_read_tokens": 52982, "total_tokens": 5736}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 44, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "grep -n \"//\" out/scene.html || echo \"No // found\""}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 44, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.288355481, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "grep -n \"//\" out/scene.html || echo \"No // found\""}, "output": "Command exited with code 0.\n\nCommand output:\n96: // Background\r\n100: // Frame border\r\n105: // Metronome Body (Trapezoid)\r\n130: // Inner chamber (recessed dark area)\r\n152: // Scale plate (brass/ivory)\r\n175: // Scale ticks and markings\r\n183: // Tempo markings\r\n205: // Pendulum Arm\r\n215: // Lower counterweight rod\r\n223: // Lower counterweight bob\r\n232: // Upper pendulum rod\r\n245: // Sliding weight (bob) on rod\r\n265: // Fastener slot\r\n269: // Tip bead\r\n280: // Lower front casing / bezel\r\n302: // Brass pivot hub\r\n316: // Center screw\r\n322: // Metronome feet\r\n327: // HUD / Status text\r\n384: // Initial render\r\n389: // Continuous animation\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 45, "state": "DONE", "step_type": "agent_response", "duration_seconds": 7.821105123, "usage": {"input_tokens": 6055, "output_tokens": 4146, "thinking_tokens": 74, "cache_read_tokens": 52975, "total_tokens": 10201}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 46, "state": "ACTIVE", "step_type": "tool", "tool_name": "write_file", "tool_info": {"name": "write_file", "parameters": {"Path": "/home/bob/usecase-runs/b2930/out/agy/gemini-3.8-flash-medium/b30o08/work/out/scene.html"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 46, "state": "DONE", "step_type": "tool", "tool_name": "write_file", "duration_seconds": 0.108451003, "tool_info": {"name": "write_file", "parameters": {"Path": "/home/bob/usecase-runs/b2930/out/agy/gemini-3.8-flash-medium/b30o08/work/out/scene.html"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 47, "state": "DONE", "step_type": "agent_response", "duration_seconds": 1.803540164, "usage": {"input_tokens": 6192, "output_tokens": 78, "thinking_tokens": 21, "cache_read_tokens": 57060, "total_tokens": 6270}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 48, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "grep -n \"//\" out/scene.html || echo \"No // found\""}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 48, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.302334723, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "grep -n \"//\" out/scene.html || echo \"No // found\""}, "output": "Command exited with code 0.\n\nCommand output:\nNo // found\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 49, "state": "DONE", "step_type": "agent_response", "duration_seconds": 2.137510408, "usage": {"input_tokens": 2292, "output_tokens": 83, "thinking_tokens": 25, "cache_read_tokens": 61127, "total_tokens": 2375}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 50, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "grep -ni \"http\" out/scene.html || echo \"No http found\""}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 50, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.284089844, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "grep -ni \"http\" out/scene.html || echo \"No http found\""}, "output": "Command exited with code 0.\n\nCommand output:\nNo http found\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 51, "state": "DONE", "step_type": "agent_response", "duration_seconds": 1.7129262060000001, "usage": {"input_tokens": 2473, "output_tokens": 55, "thinking_tokens": 7, "cache_read_tokens": 61118, "total_tokens": 2528}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 52, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "wc -c out/scene.html"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 52, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.282300647, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "wc -c out/scene.html"}, "output": "Command exited with code 0.\n\nCommand output:\n10968 out/scene.html\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 53, "state": "DONE", "step_type": "agent_response", "duration_seconds": 4.677051803, "usage": {"input_tokens": 2632, "output_tokens": 1044, "thinking_tokens": 40, "cache_read_tokens": 61110, "total_tokens": 3676}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 54, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst http = require(\"http\");\nconst { spawn } = require(\"child_process\");\n\nconst chrome = spawn(\"google-chrome\", [\n \"--headless=new\",\n \"--no-sandbox\",\n \"--disable-gpu\",\n \"--window-size=800,600\",\n \"--remote-debugging-port=9225\",\n \"file://\" + process.cwd() + \"/out/scene.html\"\n]);\n\nsetTimeout(async () => {\n http.get(\"http://127.0.0.1:9225/json\", async (res) => {\n let data = \"\";\n res.on(\"data\", chunk => data += chunk);\n res.on(\"end\", async () => {\n const list = JSON.parse(data);\n \u2026"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 54, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 3.958266677, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "node -e '\nconst http = require(\"http\");\nconst { spawn } = require(\"child_process\");\n\nconst chrome = spawn(\"google-chrome\", [\n \"--headless=new\",\n \"--no-sandbox\",\n \"--disable-gpu\",\n \"--window-size=800,600\",\n \"--remote-debugging-port=9225\",\n \"file://\" + process.cwd() + \"/out/scene.html\"\n]);\n\nsetTimeout(async () => {\n http.get(\"http://127.0.0.1:9225/json\", async (res) => {\n let data = \"\";\n res.on(\"data\", chunk => data += chunk);\n res.on(\"end\", async () => {\n const list = JSON.parse(data);\n \u2026"}, "output": "Command exited with code 0.\n\nCommand output:\nCanvas dimensions: {\"w\":700,\"h\":450,\"aw\":700,\"ah\":450}\r\nPage title: Metronome 596\r\nAll 20 time samples passed angle and beat checks: true\r\nConsole errors recorded: []\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 55, "state": "DONE", "step_type": "agent_response", "duration_seconds": 1.854847677, "usage": {"input_tokens": 3824, "output_tokens": 144, "thinking_tokens": 104, "cache_read_tokens": 61106, "total_tokens": 3968}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 56, "state": "ACTIVE", "step_type": "tool", "tool_name": "run_command", "tool_info": {"name": "run_command", "parameters": {"CommandLine": "ls -la out"}}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 56, "state": "DONE", "step_type": "tool", "tool_name": "run_command", "duration_seconds": 0.28684193, "tool_info": {"name": "run_command", "parameters": {"CommandLine": "ls -la out"}, "output": "Command exited with code 0.\n\nCommand output:\ntotal 20\r\ndrwxr-xr-x 2 bob bob 4096 Oct 23 07:12 .\r\ndrwxr-xr-x 4 bob bob 4096 Oct 23 05:55 ..\r\n-rw-r--r-- 1 bob bob 10968 Oct 23 07:13 scene.html\r\n"}}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 57, "state": "ACTIVE", "step_type": "agent_response", "text_delta": "The animated metronome s"}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 57, "state": "ACTIVE", "step_type": "agent_response", "text_delta": "cene has bee"}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 57, "state": "ACTIVE", "step_type": "agent_response", "text_delta": "n implemented in [`out/scene.html`](file:///home"}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 57, "state": "ACTIVE", "step_type": "agent_response", "text_delta": "/bob/usecase"}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 57, "state": "ACTIVE", "step_type": "agent_response", "text_delta": "-runs/b2930/out/agy/gemi"}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 57, "state": "ACTIVE", "step_type": "agent_response", "text_delta": "ni-"}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 57, "state": "ACTIVE", "step_type": "agent_response", "text_delta": "3.8-flash-medium/b30o08/work/out/scene.html) mee"}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 57, "state": "ACTIVE", "step_type": "agent_response", "text_delta": "ting"}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 57, "state": "ACTIVE", "step_type": "agent_response", "text_delta": " all contract specifications and tes"}}
{"event": "step_update", "step_update": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "step_index": 57, "state": "ACTIVE", "step_type": "agent_response", "text_delta": "t requirements:\n\n- **Sel"}}
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{"event": "result", "result": {"conversation_id": "4a73e3cb-9daf-4ca0-98c9-5712d3f8abb1", "status": "SUCCESS", "response": "The animated metronome scene has been implemented in [`out/scene.html`](file:///home/bob/usecase-runs/b2930/out/agy/gemini-3.8-flash-medium/b30o08/work/out/scene.html) meeting all contract specifications and test requirements:\n\n- **Self-contained**: Single standalone HTML file (10,968 bytes \u2264 200,000 bytes), inline CSS and JavaScript, referencing no external scripts, fonts, images, or network URLs.\n- **Stage**: Visible `<canvas>` stage styled and sized to 700 \u00d7 450 CSS pixels, with `<title>` set to `\"Metronome 596\"` as specified in `spec.json`.\n- **Animation**: Runs continuously from page load via `requestAnimationFrame` with a swinging arm sweeping across \u00b125\u00b0 at the repeating pattern tempo (2 beats @ 180 BPM, then 3 beats @ 210 BPM).\n- **Scene State API**: `window.sceneState()` synchronously calculates and updates the rendered frame, returning `{ beats, angle_deg, b, time, pivot_x, pivot_y, tip_x, tip_y, x, y }` relative to stage pixel coordinates.\n- **Verification**: Verified in headless Chrome:\n - No console errors or uncaught exceptions (`[]`).\n - Strict compliance with `sceneState().beats` (integer beats completed since time 0).\n - Strict compliance with `sceneState().angle_deg` within tolerance of `amplitude_deg \u00d7 cos(\u03c0 \u00d7 b)`.\n - Frame differential check across 30 screenshots confirms continuous visual movement well above the 0.1% pixel threshold.\n", "duration_seconds": 176.896059033, "num_turns": 1, "usage": {"input_tokens": 199766, "output_tokens": 47680, "thinking_tokens": 32943, "cache_read_tokens": 965720, "total_tokens": 247446}}}