diff --git a/CHANGELOG.md b/CHANGELOG.md
index 868bcac..b4c30e7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,15 @@
 
 All notable changes to the CueMap Python SDK will be documented in this file.
 
+## [0.7.5] - 2026-10-14
+
+### Added
+- `ingest_content(..., segmenter="conversation")` for chat histories (Claude or ChatGPT exports, JSON message lists, role- or speaker-labelled transcripts): one memory per message with conversation, turn and role metadata.
+
+### Changed
+- Synchronized with CueMap Engine v0.7.5.
+- `expansion_depth` now accepts `"conversation_round"` and defaults to `None`, so recall uses the engine default (`"conversation_round"`: each result gets the message it replies to, and the top result gets its answer; memories without session, turn and role metadata are returned as they are). Pass `expansion_depth=1` for the previous matched-memory-only behaviour.
+
 ## [0.7.3] - 2026-08-27
 
 ### Changed
diff --git a/README.md b/README.md
index a0f742f..d173b78 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
   <a href="https://pypi.org/project/cuemap/"><img src="https://img.shields.io/pypi/v/cuemap?logo=pypi&logoColor=white" alt="PyPI"></a>
   <a href="https://pypi.org/project/cuemap/"><img src="https://img.shields.io/pypi/pyversions/cuemap?logo=python&logoColor=white" alt="Python versions"></a>
   <a href="LICENSE"><img src="https://img.shields.io/badge/license-MIT-5e5ce6" alt="License"></a>
-  <a href="https://github.com/cuemap-dev/cuemap"><img src="https://img.shields.io/badge/engine-v0.7.3-0f766e" alt="Engine compatibility"></a>
+  <a href="https://github.com/cuemap-dev/cuemap"><img src="https://img.shields.io/badge/engine-v0.7.5-0f766e" alt="Engine compatibility"></a>
 </p>
 
 **High-performance temporal-associative memory store** designed for dynamic contextual retrieval.
diff --git a/cuemap/__init__.py b/cuemap/__init__.py
index 3aa8bb2..cb89ecc 100644
--- a/cuemap/__init__.py
+++ b/cuemap/__init__.py
@@ -23,7 +23,7 @@
 from .exceptions import CueMapError, ConnectionError, AuthenticationError
 from .grounding import CueMapGroundingRetriever, AsyncCueMapGroundingRetriever
 
-__version__ = "0.7.3"
+__version__ = "0.7.5"
 __all__ = [
     "CueMap",
     "AsyncCueMap",
diff --git a/cuemap/client.py b/cuemap/client.py
index 3d51792..3b0665c 100644
--- a/cuemap/client.py
+++ b/cuemap/client.py
@@ -1,7 +1,7 @@
 """Pure CueMap client - no magic, just speed."""
 
 import httpx
-from typing import List, Optional, Dict, Any
+from typing import List, Optional, Dict, Any, Union
 
 from .models import Memory, RecallResult, RecallPreviewResult
 from .exceptions import CueMapError, ConnectionError, AuthenticationError
@@ -167,7 +167,7 @@ def recall(
         disable_salience_bias: bool = False,
         disable_alias_expansion: bool = True,
         trace_timing: bool = False,
-        expansion_depth: int = 1,
+        expansion_depth: Optional[Union[int, str]] = None,
         parent_fusion: str = "off",
         parent_fusion_limit: int = 80,
         parent_fusion_min_chunks: int = 2,
@@ -197,6 +197,11 @@ def recall(
             projects: List of project IDs for cross-domain queries
             limit: Maximum results to return
             depth: Number of multi-hop recall expansion hops
+            expansion_depth: Neighbour context per result. Unset uses the engine default,
+                "conversation_round": prepend the message each result replies to and
+                append the answer to the top result (needs session, turn and role
+                metadata; other memories are returned as they are). A number gives
+                source-order neighbours instead (1 = matched memory only)
             auto_reinforce: Automatically reinforce retrieved memories
             min_intersection: Minimum number of cues that must match
             explain: Include recall explanation in results
@@ -273,7 +278,7 @@ def recall_grounded(
         min_intersection: Optional[int] = None,
         disable_salience_bias: bool = False,
         disable_alias_expansion: bool = True,
-        expansion_depth: int = 1,
+        expansion_depth: Optional[Union[int, str]] = None,
         disable_pattern_completion: Optional[bool] = None,
         disable_systems_consolidation: Optional[bool] = None,
     ) -> Dict[str, Any]:
@@ -727,7 +732,12 @@ def ingest_content(
         segment_min_chunk_chars: Optional[int] = None,
         segment_max_chunk_chars: Optional[int] = None,
     ) -> Dict[str, Any]:
-        """Ingest raw content."""
+        """Ingest raw content.
+
+        segmenter: "sentence_window" (default), "logical_block", or "conversation" for chat
+        histories (Claude or ChatGPT exports, JSON message lists, or role/speaker-labelled
+        transcripts): one memory per message with conversation, turn and role metadata.
+        """
         response = self.client.post(
             "/ingest/content",
             json=_clean_payload({
@@ -966,7 +976,7 @@ async def recall(
         disable_salience_bias: bool = False,
         disable_alias_expansion: bool = True,
         trace_timing: bool = False,
-        expansion_depth: int = 1,
+        expansion_depth: Optional[Union[int, str]] = None,
         parent_fusion: str = "off",
         parent_fusion_limit: int = 80,
         parent_fusion_min_chunks: int = 2,
@@ -1052,7 +1062,7 @@ async def recall_grounded(
         min_intersection: Optional[int] = None,
         disable_salience_bias: bool = False,
         disable_alias_expansion: bool = True,
-        expansion_depth: int = 1,
+        expansion_depth: Optional[Union[int, str]] = None,
         disable_pattern_completion: Optional[bool] = None,
         disable_systems_consolidation: Optional[bool] = None,
     ) -> Dict[str, Any]:
diff --git a/pyproject.toml b/pyproject.toml
index d0384fc..8c8db56 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "cuemap"
-version = "0.7.3"
+version = "0.7.5"
 description = "CueMap Python SDK - High-performance temporal-associative memory"
 readme = "README.md"
 requires-python = ">=3.8"