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+# MLonMCU - Validation (new)
+
+## Updates
+
+- `mlonmcu-sw` (`$MLONMCU_HOME/models/`):
+	- `resnet/definition.yml`
+		- Add input/output dtype
+		- Add dequantize details (taken from `mlif_override.cpp`)
+	- `resnet/support/mlif_override.cpp`
+		- Comment out old validation code
+		- Add example code to dump raw inputs/outputs via stdin/stdout
+- `mlonmcu-sw` (`$MLONMCU_HOME/deps/src/mlif`):
+	- Nothing changed (yet)
+- `mlonmcu`:
+	- `mlonmcu/target/common.py`
+		- Allow overriding used encoding for stdout (Required for dumping raw data)
+		- Add optional `stdin_data` argument for passing input to process (Only works with `live=False` aka. `-c {target}.print_outputs=0`)
+	- `mlonmcu/target/target.py` / `mlonmcu/target/riscv/spike.py`
+		- `target.exec()` may return artifacts now
+		- Add checks: `supports_filesystem`, `supports_stdout`, `supports_stdin`, `supports_argv`, `supports_uart`
+	- `mlonmcu/feature/feature.py`:
+		- Add `gen_data` feature
+		- Add `gen_ref_data` feature
+		- Add `set_inputs` feature
+		- Add `get_outputs` feature
+		- Add wrapper `validate_new` feature (Limitation: can not enable postprocess yet)
+	- `mlonmcu/models/frontend.py`
+		- Parse input/output types from `definition.yml`
+		- Parse quantization/dequantization details from `definition.yml`
+		- Create `model_info.yml` Artifact to pass input/output dtypes/shapes/quant to later stages
+		- Implement `gen_data` functionality (including workaround to convert raw `inputs/0.bin` to numpy)
+		- Implement dummy `gen_ref_data` functionality
+	- `mlonmcu/platform/mlif/mlif.py` / `mlonmcu/platform/mlif/mlif_target.py`
+		- Implement `set_inputs` functionality (stdin_raw only)
+		- Implement `get_outputs` functionality (stdout_raw only)
+		- Implement batching (run simulation serveral {num_inputs/batch_size} times, with different inputs)
+	- `mlonmcu/platform/tvm/tvm_target_platform.py` / `mlonmcu/platform/tvm/tvm_target.py`
+		- Implement `set_inputs` functionality (filesystem only)
+		- Implement `get_outputs` functionality (filesystem only)
+		- Implement batching (run simulation serveral {num_inputs/batch_size} times, with different inputs)
+	- `mlonmcu/session/postprocess/postprocesses.py`
+		- Add `ValidateOutputs` postprocess (WIP)
+
+
+
+
+## Examples
+
+```
+# platform: tvm target: tvm_cpu`
+# implemented:
+python3 -m mlonmcu.cli.main flow run resnet -v \
+	--target tvm_cpu --backend tvmllvm \
+	--feature validate_new --post validate_outputs \
+	-c tvm.print_outputs=1 -c tvm_cpu.print_outputs=1
+	-c set_inputs.interface=filesystem -c get_outputs.interface=filesystem
+python3 -m mlonmcu.cli.main flow run resnet -v \
+	--target tvm_cpu --backend tvmllvm \
+	--feature validate_new --post validate_outputs \
+	-c tvm.print_outputs=1 -c tvm_cpu.print_outputs=1
+	-c set_inputs.interface=auto -c get_outputs.interface=auto
+
+# not implemented:
+python3 -m mlonmcu.cli.main flow run resnet -v \
+	--target tvm_cpu --backend tvmllvm \
+	--feature validate_new --post validate_outputs \
+	-c tvm.print_outputs=1 -c tvm_cpu.print_outputs=1
+	-c set_inputs.interface=filesystem -c get_outputs.interface=stdout
+
+# platform: mlif target: spike
+# implemented:
+python3 -m mlonmcu.cli.main flow run resnet -v \
+	--target spike  --backend tvmaotplus    \
+	-f validate \
+	--feature validate_new --post validate_outputs \
+	-c mlif.print_outputs=1 -c spike.print_outputs=0 \
+	-c set_inputs.interface=stdin_raw -c get_outputs.interface=stdout_raw
+
+# not implemented:
+# python3 -m mlonmcu.cli.main flow run resnet -v \
+	--target spike  --backend tvmaotplus    \
+	-f validate \
+	--feature validate_new --post validate_outputs \
+	-c mlif.print_outputs=1 -c spike.print_outputs=1 \
+	-c set_inputs.interface=stdin -c get_outputs.interface=stdout
+# python3 -m mlonmcu.cli.main flow run resnet -v \
+	--target spike  --backend tvmaotplus    \
+	-f validate \
+	--feature validate_new --post validate_outputs \
+	-c mlif.print_outputs=1 -c spike.print_outputs=1 \
+	-c set_inputs.interface=filesystem -c get_outputs.interface=filesystem
+# python3 -m mlonmcu.cli.main flow run resnet -v \
+	--target spike  --backend tvmaotplus    \
+	-f validate \
+	--feature validate_new --post validate_outputs \
+	-c mlif.print_outputs=1 -c spike.print_outputs=0 \
+	-c set_inputs.interface=auto -c get_outputs.interface=auto
+# combinations (e.g. filesystem+stdout) should also be tested!
+
+# platform: mlif target: host_x86`
+# TODO: should support same configs as spike target
+```
+
+## TODOs
+- [ ] Fix broken targets (due to refactoring of `self.exec`) -> PHILIPP
+- [ ] Add missing target checks (see above) -> PHILIPP
+- [ ] Update `definition.yml` for other models in `mlonmcu-sw` (At least `aww`, `vww`, `toycar`) -> LIU
+- [ ] Refactor model support (see `mlomcu_sw/lib/ml_interface`) to be aware of output/input tensor index (maybe even name?) und sample index -> PHILIPP
+- [ ] Write generator for custom `mlif_override.cpp` (based on `model_info.yml` + `in_interface` + `out_interface` (+ `inputs.npy`)) -> LIU
+- [ ] Eliminate hacks used to get `model_info.yml` and `inputs.yml` in RUN stage -> PHILIPP
+- [ ] Implement missing interfaces for tvm (out: `stdout`) -> LIU
+- [ ] Implement missing interfaces for mlif platform (in: `filesystem`, `stdin`; out: `filesystem`, `stdout`) -> LIU
+- [ ] Implement missing interfaces for mlif platform (in: `rom`) -> PHILIPP)
+- [ ] Add support for multi-output/multi-input -> PHILIPP/LIU
+- [ ] Update `gen_data` & `gen_ref_data` feature (see NotImplementedErrors, respect fmt,...) -> LIU
+- [ ] Move `gen_data` & `gen_ref_data` from LOAD stage to custom stage (remove dependency on tflite frontend) -> PHILIPP
+- [ ] Test with targets: `tvm_cpu`, `host_x86`, `spike` (See example commands above) -> LIU
+- [ ] Extend `validate_outputs` postprocess (Add `report`, implement `atol`/`rtol`, `fail_on_error`, `top-k`,...) -> LIU
+- [ ] Add more validation data (at least 10 samples per model, either manually or using `gen_ref_outputs`) -> LIU
+- [ ] Generate validation reports for a few models (`aww`, `vww`, `resnet`, `toycar`) and at least backends (`tvmaotplus`, `tflmi`) -> LIU
+- [ ] Cleanup codebases (lint, remove prints, reuse code, create helper functions,...) -> LIU/PHILIPP
+- [ ] Document usage of new validation feature -> LIU
+- [ ] Add tests -> LIU/PHILIPP
+- [ ] Streamline `model_info.yml` with BUILD stage `ModelInfo` -> PHILIPP
+- [ ] Improve artifacts handling -> PHILIPP
+- [ ] Support automatic quantization of inputs (See `vww` and `toycar`) -> PHILIPP/LIU