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How to operate the C++ Aligned-Memory Backtester from Python (quanuxctl).
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| name | QuanuX Crucible |
| description | How to operate the C++ Aligned-Memory Backtester from Python (quanuxctl). |
The QuanuX Crucible is a state-of-the-art C++20 simulation environment. It executes strategies and models Limit Order Book (L3) dynamics at speeds 100x faster than traditional Python execution stacks. It achieves this by bypassing the Python interpreter for data ingestion and metric tracking, binding directly to DuckDB's C++ Appender API via Cython.
If a user requests backtesting, execution telemetry, or strategy simulation, you must use Crucible and orchestrate it via the quanuxctl crucible command group.
DO NOT attempt to run standard python scripts (e.g. python my_strategy.py) if the user mentions "Backtesting in Crucible". The process must be isolated using the CLI.
The test harness must have been generated previously via the Foundry generator, outputting to /server/backtests/<strategy_name>_v<version>/crucible_harness_python.py.
If it does not exist, use the Foundry forge tools to create one.
quanuxctl crucible start <strategy_name> --version <version>
os.setsid()./tmp/quanux_crucible.pid./server/backtests/<strategy_v1.0.0>/crucible.duckdb.Provide the user with live CPU/Memory telemetry:
quanuxctl crucible status
To pull the data without halting the active agent context, execute the instantaneous report query.
quanuxctl crucible report <strategy_name> --version <version>
CRITICAL: quanuxctl crucible report does not build a Pandas dataframe or fire up a SQL runtime. It calls the get_metrics_json() Cython binding directly mapped to DuckDB's native C API and returns a raw JSON payload of the backtest.
If this query fails (e.g. "No backtest data found"), you must start the engine first.
CrucibleTrade class internally (via Python binding), remember that its underlying C++ struct (alignas(128)) is strictly padded to exactly 128 bytes to hit CPU L1/L2 cache lines efficiently.PyCrucibleTrade class. Fields must exist in quanux_crucible.pxd.