diff --git a/src/instructlab/sdg/configs/knowledge/spellcheck.yaml b/src/instructlab/sdg/configs/knowledge/spellcheck.yaml
new file mode 100644
index 00000000..daf1dafa
--- /dev/null
+++ b/src/instructlab/sdg/configs/knowledge/spellcheck.yaml
@@ -0,0 +1,17 @@
+system: You are an AI assistant that is an expert at fixing spelling errors in documents.
+
+introduction: |
+  Give me a copy of the below document with all spelling errors corrected.
+
+principles: |
+  Do not add any new information.
+  Do not leave out any information.
+
+examples: ""
+
+generation: |
+  Document:
+  {document}
+
+start_tags: [""]
+end_tags: [""]
diff --git a/src/instructlab/sdg/datamixing.py b/src/instructlab/sdg/datamixing.py
index 9d5c10f0..26c86a1d 100644
--- a/src/instructlab/sdg/datamixing.py
+++ b/src/instructlab/sdg/datamixing.py
@@ -1,5 +1,5 @@
 # Standard
-from typing import Optional
+from typing import Dict, List, Optional
 import json
 import logging
 import os.path
@@ -12,6 +12,7 @@
 
 # First Party
 from instructlab.sdg.utils import GenerateException, pandas
+from instructlab.sdg.utils.pandas import dataset_from_pandas_dataframe
 
 ALLOWED_COLS = ["id", "messages", "metadata"]
 logger = logging.getLogger(__name__)
@@ -374,7 +375,68 @@ def _conv_pretrain(rec):
     return rec
 
 
-def _create_phase10_ds(generated_dataset: Dataset):
+def _create_auxiliary_dataset(
+    generated_dataset: Dataset, auxiliary_inst: Optional[Dict[str, List[str]]]
+):
+    # Samples that went through the auxiliary generation pipeline will
+    # have a dataset_type column created by that pipeline. If that's
+    # not present, then we may be running in a pipeline without any
+    # auxiliary dataset generation enabled.
+    if "dataset_type" not in generated_dataset.column_names:
+        return None
+    # If we didn't find any auxiliary instructions to load, then
+    # that's also another sign that we're not running with any
+    # auxiliary datasets enabled.
+    if auxiliary_inst is None:
+        return None
+    # This "base_document" dataset_type is set in the knowledge
+    # pipeline config, and represents samples that do not have the
+    # auxiliary generated document attached, so we filter those out.
+    auxiliary_ds = generated_dataset.filter(
+        lambda x: x["dataset_type"] != "base_document"
+    )
+    unique_document_auxiliary = auxiliary_ds.to_pandas().drop_duplicates(
+        subset=["document"]
+    )
+    unique_document_auxiliary = dataset_from_pandas_dataframe(unique_document_auxiliary)
+    unique_document_auxiliary = unique_document_auxiliary.select_columns(
+        [
+            "raw_document",
+            "document_outline",
+            "domain",
+            "dataset_type",
+            "document",
+        ]
+    )
+    unique_document_auxiliary = unique_document_auxiliary.rename_columns(
+        {"raw_document": "context", "document": "response"}
+    )
+
+    def __create_auxiliary_ds(rec):
+        instruction = random.choice(auxiliary_inst[rec["dataset_type"]])
+        messages = [
+            {"role": "user", "content": f"{rec['context']}\n\n{instruction}"},
+            {"role": "assistant", "content": rec["response"]},
+        ]
+        metadata = json.dumps(
+            {
+                "dataset_type": rec["dataset_type"],
+                "raw_document": rec["context"],
+                "dataset": f"document_{rec['dataset_type']}",
+                "domain": rec["domain"],
+            }
+        )
+        return {"messages": messages, "metadata": metadata, "id": str(uuid.uuid4())}
+
+    unique_document_auxiliary = unique_document_auxiliary.map(
+        __create_auxiliary_ds, remove_columns=unique_document_auxiliary.column_names
+    )
+    return unique_document_auxiliary
+
+
+def _create_phase10_ds(
+    generated_dataset: Dataset, auxiliary_inst: Optional[Dict[str, List[str]]]
+):
     """
     Create a dataset for Phase 1.0 of downstream training.
 
@@ -387,10 +449,17 @@ def _create_phase10_ds(generated_dataset: Dataset):
     )
     knowledge_ds = _add_extra_contexts_to_samples(knowledge_ds, p=0.4)
 
-    return knowledge_ds
+    auxiliary_dataset = _create_auxiliary_dataset(generated_dataset, auxiliary_inst)
+    if auxiliary_dataset is not None:
+        phase10 = concatenate_datasets([knowledge_ds, auxiliary_dataset])
+    else:
+        phase10 = knowledge_ds
+    return phase10
 
 
-def _create_phase07_ds(generated_dataset: Dataset):
+def _create_phase07_ds(
+    generated_dataset: Dataset, auxiliary_inst: Optional[Dict[str, List[str]]]
+):
     """
     Create a dataset for Phase 0.7 of downstream training.
 
@@ -404,7 +473,13 @@ def _create_phase07_ds(generated_dataset: Dataset):
     )
     knowledge_ds = knowledge_ds.map(_conv_pretrain)
 
-    return knowledge_ds
+    auxiliary_dataset = _create_auxiliary_dataset(generated_dataset, auxiliary_inst)
+    if auxiliary_dataset is not None:
+        auxiliary_dataset = auxiliary_dataset.map(_conv_pretrain)
+        phase07 = concatenate_datasets([knowledge_ds, auxiliary_dataset])
+    else:
+        phase07 = knowledge_ds
+    return phase07
 
 
 def _convert_to_leaf_node_messages(sample: dict, sys_prompt: str):
@@ -440,12 +515,21 @@ class DataMixer:
     # once.
     NUM_SYNTH_SKILLS = 30
 
-    def __init__(self, data_dirs, output_dir, date_suffix, sys_prompt, num_procs):
+    def __init__(
+        self,
+        data_dirs,
+        output_dir,
+        date_suffix,
+        sys_prompt,
+        num_procs,
+        auxiliary_inst=None,
+    ):
         self.data_dirs = data_dirs
         self.output_dir = output_dir
         self.sys_prompt = sys_prompt
         self.date_suffix = date_suffix
         self.num_procs = num_procs
+        self.auxiliary_inst = auxiliary_inst
 
         self.knowledge_recipe = self._load_default_recipe("knowledge.yaml")
         self.skills_recipe = self._load_default_recipe("skills.yaml")
@@ -482,7 +566,9 @@ def _gen_leaf_node_data(
 
     def collect(self, leaf_node_path, new_generated_data, is_knowledge):
         if is_knowledge:
-            knowledge_phase_data = _create_phase07_ds(new_generated_data)
+            knowledge_phase_data = _create_phase07_ds(
+                new_generated_data, self.auxiliary_inst
+            )
             output_file_leaf_knowledge = (
                 f"node_datasets_{self.date_suffix}/{leaf_node_path}_p07.jsonl"
             )
@@ -492,7 +578,9 @@ def collect(self, leaf_node_path, new_generated_data, is_knowledge):
                 output_file_leaf_knowledge,
             )
 
-            skills_phase_data = _create_phase10_ds(new_generated_data)
+            skills_phase_data = _create_phase10_ds(
+                new_generated_data, self.auxiliary_inst
+            )
             output_file_leaf_skills = (
                 f"node_datasets_{self.date_suffix}/{leaf_node_path}_p10.jsonl"
             )
diff --git a/src/instructlab/sdg/generate_data.py b/src/instructlab/sdg/generate_data.py
index 3231f9ec..eeb0c016 100644
--- a/src/instructlab/sdg/generate_data.py
+++ b/src/instructlab/sdg/generate_data.py
@@ -247,7 +247,7 @@ def load_pipeline(yaml_basename):
     )
 
 
-def _mixer_init(ctx, output_dir, date_suffix):
+def _mixer_init(ctx, output_dir, date_suffix, knowledge_auxiliary_inst):
     pd = platformdirs.PlatformDirs(
         appname=os.path.join("instructlab", "sdg"), multipath=True
     )
@@ -258,6 +258,7 @@ def _mixer_init(ctx, output_dir, date_suffix):
         date_suffix,
         _SYS_PROMPT,
         ctx.dataset_num_procs,
+        knowledge_auxiliary_inst,
     )
 
 
@@ -367,7 +368,10 @@ def generate_data(
     mmlu_ctx = dataclasses.replace(ctx, checkpoint_dir=None)
     mmlu_bench_pipe = mmlubench_pipe_init(mmlu_ctx)
 
-    mixer = _mixer_init(ctx, output_dir, date_suffix)
+    # FIXME: remove SDG https://github.com/instructlab/sdg/pull/64
+    mixer = _mixer_init(
+        ctx, output_dir, date_suffix, sdg_knowledge.pipelines[0].auxiliary_inst
+    )
 
     if console_output:
         logger.info(
diff --git a/src/instructlab/sdg/pipeline.py b/src/instructlab/sdg/pipeline.py
index c4206f7c..77931ca3 100644
--- a/src/instructlab/sdg/pipeline.py
+++ b/src/instructlab/sdg/pipeline.py
@@ -3,7 +3,7 @@
 from concurrent.futures import ThreadPoolExecutor
 from dataclasses import dataclass
 from importlib import resources
-from typing import Iterable, Optional
+from typing import Dict, Iterable, List, Optional
 import logging
 import math
 import os.path
@@ -109,6 +109,7 @@ def __init__(
         ctx: PipelineContext,
         config_path: str,
         chained_blocks: list[dict],
+        auxiliary_inst: Optional[Dict[str, List[str]]] = None,
     ) -> None:
         """
         Initialize the Pipeline class with a configuration dictionary.
@@ -120,12 +121,14 @@ def __init__(
         self.config_path = config_path
         # pipeline config is the run configuration that consists of the pipeline steps
         self.chained_blocks = chained_blocks
+        # datamixing instructions for auxiliary data generated by this pipeline
+        self.auxiliary_inst = auxiliary_inst
 
     @classmethod
     def from_file(cls, ctx, pipeline_yaml):
         if not os.path.isabs(pipeline_yaml):
             pipeline_yaml = os.path.join(resources.files(__package__), pipeline_yaml)
-        return cls(ctx, pipeline_yaml, _parse_pipeline_config_file(pipeline_yaml))
+        return cls(ctx, pipeline_yaml, *_parse_pipeline_config_file(pipeline_yaml))
 
     def generate(self, dataset) -> Dataset:
         """
@@ -296,7 +299,11 @@ def _parse_pipeline_config_file(pipeline_yaml):
             "The pipeline config file contains no 'blocks' section"
         )
 
-    return content["blocks"]
+    auxiliary_inst = None
+    if "datamixing" in content and "auxiliary_instructions" in content["datamixing"]:
+        auxiliary_inst = content["datamixing"]["auxiliary_instructions"]
+
+    return content["blocks"], auxiliary_inst
 
 
 # This is part of the public API.
diff --git a/src/instructlab/sdg/pipelines/full/knowledge.yaml b/src/instructlab/sdg/pipelines/full/knowledge.yaml
index 79d7d6e4..9f7b5383 100644
--- a/src/instructlab/sdg/pipelines/full/knowledge.yaml
+++ b/src/instructlab/sdg/pipelines/full/knowledge.yaml
@@ -1,5 +1,36 @@
 version: "1.0"
 blocks:
+  - name: duplicate_document_col
+    type: DuplicateColumnsBlock
+    config:
+      columns_map:
+        document: base_document
+
+  - name: gen_spellcheck
+    type: LLMBlock
+    config:
+      config_path: ../../configs/knowledge/spellcheck.yaml
+      output_cols:
+        - spellcheck
+      gen_kwargs:
+        max_tokens: 2048
+
+  - name: flatten_auxiliary_columns
+    type: FlattenColumnsBlock
+    config:
+      var_cols:
+        - spellcheck
+        - base_document
+      value_name: corrected_document
+      var_name: dataset_type
+
+  - name: rename_to_document_column
+    type: RenameColumnsBlock
+    config:
+      columns_map:
+        document: raw_document
+        corrected_document: document
+
   - name: gen_knowledge
     type: LLMBlock
     config:
@@ -73,3 +104,9 @@ blocks:
       - explanation
       - rating
       - __index_level_0__
+
+datamixing:
+  auxiliary_instructions:
+    spellcheck:
+      - Correct any spelling errors in the document and output the corrected version.
+      - Rewrite the document to remove any spelling errors.
diff --git a/src/instructlab/sdg/pipelines/schema/v1.json b/src/instructlab/sdg/pipelines/schema/v1.json
index c97844ed..64b9c477 100644
--- a/src/instructlab/sdg/pipelines/schema/v1.json
+++ b/src/instructlab/sdg/pipelines/schema/v1.json
@@ -364,6 +364,23 @@
           }
         }
       }
+    },
+    "datamixing": {
+      "type": "object",
+      "additionalProperties": false,
+      "properties": {
+        "auxiliary_instructions": {
+          "type": "object",
+          "patternProperties": {
+            ".*": {
+              "type": "array",
+              "items": {
+                "type": "string"
+              }
+            }
+          }
+        }
+      }
     }
   }
 }
diff --git a/tests/test_default_pipeline_configs.py b/tests/test_default_pipeline_configs.py
index a56e22bd..8dbdec16 100644
--- a/tests/test_default_pipeline_configs.py
+++ b/tests/test_default_pipeline_configs.py
@@ -12,6 +12,9 @@
 from instructlab.sdg.pipeline import Pipeline, PipelineContext
 from instructlab.sdg.utilblocks import (
     CombineColumnsBlock,
+    DuplicateColumnsBlock,
+    FlattenColumnsBlock,
+    RenameColumnsBlock,
     SamplePopulatorBlock,
     SelectorBlock,
 )
@@ -23,8 +26,11 @@ def _noop_generate(self, samples):
 
 @patch.object(CombineColumnsBlock, "generate", _noop_generate)
 @patch.object(ConditionalLLMBlock, "generate", _noop_generate)
+@patch.object(DuplicateColumnsBlock, "generate", _noop_generate)
 @patch.object(FilterByValueBlock, "generate", _noop_generate)
+@patch.object(FlattenColumnsBlock, "generate", _noop_generate)
 @patch.object(LLMBlock, "generate", _noop_generate)
+@patch.object(RenameColumnsBlock, "generate", _noop_generate)
 @patch.object(SamplePopulatorBlock, "generate", _noop_generate)
 @patch.object(SelectorBlock, "generate", _noop_generate)
 @patch("instructlab.sdg.llmblock.server_supports_batched", lambda c, m: True)