diff --git a/application/api/user/sources/routes.py b/application/api/user/sources/routes.py
index 114464bc..a8449bc2 100644
--- a/application/api/user/sources/routes.py
+++ b/application/api/user/sources/routes.py
@@ -10,7 +10,12 @@ from pydantic import ValidationError
 
 from application.agents.tools.path_utils import validate_tool_path
 from application.api import api
-from application.api.user.tasks import reembed_wiki_page, reingest_source_task, sync_source
+from application.api.user.tasks import (
+    convert_source_to_wiki,
+    reembed_wiki_page,
+    reingest_source_task,
+    sync_source,
+)
 from application.api.user.team_sharing import (
     can_access,
     effective_write_owner,
@@ -23,6 +28,7 @@ from application.storage.db.repositories.ingest_chunk_progress import (
 )
 from application.storage.db.repositories.sources import SourcesRepository
 from application.storage.db.repositories.wiki_pages import (
+    WikiPageConflict,
     WikiPagesRepository,
     _content_hash,
     rebuild_wiki_directory_structure,
@@ -624,6 +630,26 @@ class SourceConfigResource(Resource):
                 # Ingest-time fields (config.chunking) only take effect after a
                 # re-ingest (D8); compare against the current config to decide.
                 current_config = SourceConfig.parse(doc.get("config"))
+                # kind changes route exclusively through /wiki/convert. An
+                # explicit kind in the body that differs from the persisted
+                # kind is rejected (either direction); otherwise the current
+                # kind is preserved so a partial edit omitting it (the model
+                # defaults to "classic") never demotes a wiki.
+                if "kind" in body and body["kind"] != current_config.kind:
+                    return make_response(
+                        jsonify(
+                            {
+                                "success": False,
+                                "message": (
+                                    "Change wiki mode via "
+                                    "POST /api/sources/<id>/wiki/convert, "
+                                    "not the config endpoint."
+                                ),
+                            }
+                        ),
+                        400,
+                    )
+                new_config.kind = current_config.kind
                 requires_reingest = (
                     new_config.chunking.model_dump()
                     != current_config.chunking.model_dump()
@@ -670,6 +696,7 @@ def _wiki_page_node(page):
         "token_count": page.get("token_count") or 0,
         "version": page.get("version"),
         "embed_status": page.get("embed_status"),
+        "updated_by": page.get("updated_by"),
         "updated_at": (
             page["updated_at"].isoformat()
             if page.get("updated_at") is not None
@@ -679,6 +706,18 @@ def _wiki_page_node(page):
     }
 
 
+_wiki_page_edit_model = sources_ns.model(
+    "WikiPageEditModel",
+    {
+        "path": fields.String(required=True, description="Page path"),
+        "content": fields.String(required=True, description="Markdown content"),
+        "expected_version": fields.Integer(
+            description="Optimistic-lock version from the last read"
+        ),
+    },
+)
+
+
 @sources_ns.route("/sources/wiki")
 class CreateWikiSource(Resource):
     create_wiki_model = api.model(
@@ -838,3 +877,208 @@ class WikiPage(Resource):
         node = _wiki_page_node(page)
         node["content"] = page.get("content") or ""
         return make_response(jsonify({"success": True, "page": node}), 200)
+
+    @api.expect(_wiki_page_edit_model)
+    @api.doc(
+        description="Create or overwrite a wiki page (human edit). Write access "
+        "required; a stale expected_version returns 409."
+    )
+    def put(self, source_id):
+        decoded_token = request.decoded_token
+        if not decoded_token:
+            return make_response(jsonify({"success": False}), 401)
+        user = decoded_token.get("sub")
+        data = request.get_json(silent=True) or {}
+        missing_fields = check_required_fields(data, ["path", "content"])
+        if missing_fields:
+            return missing_fields
+        path = validate_tool_path(data["path"])
+        if not path or path == "/" or path.endswith("/"):
+            return make_response(
+                jsonify({"success": False, "message": "Invalid page path"}), 400
+            )
+        content = data["content"]
+        expected_version = data.get("expected_version")
+        try:
+            with db_session() as conn:
+                owner = effective_write_owner(conn, "source", source_id, user)
+                if not owner:
+                    return make_response(
+                        jsonify(
+                            {"success": False, "message": "Source not accessible"}
+                        ),
+                        403,
+                    )
+                doc = SourcesRepository(conn).get_any(source_id, owner)
+                if doc is None:
+                    return make_response(
+                        jsonify({"success": False, "message": "Source not found"}),
+                        404,
+                    )
+                resolved_source_id = str(doc["id"])
+                try:
+                    page = WikiPagesRepository(conn).upsert(
+                        resolved_source_id,
+                        path,
+                        content,
+                        updated_by=user,
+                        expected_version=expected_version,
+                    )
+                except WikiPageConflict:
+                    return make_response(
+                        jsonify(
+                            {
+                                "success": False,
+                                "message": (
+                                    "Page changed since you loaded it. "
+                                    "Reload and reapply your edit."
+                                ),
+                            }
+                        ),
+                        409,
+                    )
+                rebuild_wiki_directory_structure(conn, resolved_source_id, owner)
+        except Exception as err:
+            current_app.logger.error(
+                f"Error editing wiki page for {source_id}: {err}", exc_info=True
+            )
+            return make_response(jsonify({"success": False}), 400)
+        try:
+            reembed_wiki_page.delay(
+                resolved_source_id,
+                path,
+                _content_hash(content),
+                user=owner,
+                idempotency_key=(
+                    f"reembed-wiki:{resolved_source_id}:{path}:"
+                    f"{_content_hash(content)}"
+                ),
+            )
+        except Exception as err:
+            current_app.logger.error(
+                f"Error enqueuing wiki re-embed for {source_id}: {err}",
+                exc_info=True,
+            )
+        return make_response(
+            jsonify({"success": True, "page": _wiki_page_node(page)}), 200
+        )
+
+
+def _source_is_blank(doc):
+    """True when a source has no ingested files to convert into pages."""
+    structure = doc.get("directory_structure") or {}
+    if isinstance(structure, str):
+        try:
+            structure = json.loads(structure)
+        except Exception:
+            structure = {}
+    return not bool(structure)
+
+
+def _enable_wiki_inline(conn, doc, owner):
+    """Flip a blank source to wiki mode + agentic exposure with no task."""
+    cfg = SourceConfig.parse(doc.get("config"))
+    SourcesRepository(conn).update(
+        str(doc["id"]), owner, {"config": cfg.wiki_enabled()}
+    )
+
+
+@sources_ns.route("/sources/<string:source_id>/wiki/convert")
+class ConvertSourceToWiki(Resource):
+    @api.doc(
+        description="Convert an ingested source into a wiki. A blank source is "
+        "enabled inline; a source with files runs a conversion task (poll its "
+        "status for the per-file summary). Write access required (owner/editor)."
+    )
+    def post(self, source_id):
+        decoded_token = request.decoded_token
+        if not decoded_token:
+            return make_response(jsonify({"success": False}), 401)
+        user = decoded_token.get("sub")
+        try:
+            with db_session() as conn:
+                owner = effective_write_owner(conn, "source", source_id, user)
+                if not owner:
+                    return make_response(
+                        jsonify(
+                            {"success": False, "message": "Source not accessible"}
+                        ),
+                        403,
+                    )
+                doc = SourcesRepository(conn).get_any(source_id, owner)
+                if doc is None:
+                    return make_response(
+                        jsonify({"success": False, "message": "Source not found"}),
+                        404,
+                    )
+                resolved_source_id = str(doc["id"])
+                # A mid-ingest source has an incomplete directory structure, so
+                # it could be mis-detected as blank and wrongly enabled inline.
+                # Reject while an embed is still in flight (mirrors the
+                # "processing" ingest status the sources list derives).
+                progress = IngestChunkProgressRepository(conn).get_progress(
+                    resolved_source_id
+                )
+                if (
+                    progress
+                    and progress.get("status") != "stalled"
+                    and (progress.get("embedded_chunks") or 0)
+                    < (progress.get("total_chunks") or 0)
+                ):
+                    return make_response(
+                        jsonify(
+                            {
+                                "success": False,
+                                "message": (
+                                    "Source is still ingesting; wait for it to "
+                                    "finish before converting to a wiki."
+                                ),
+                            }
+                        ),
+                        409,
+                    )
+                cfg = SourceConfig.parse(doc.get("config"))
+                if cfg.kind == "wiki":
+                    return make_response(
+                        jsonify(
+                            {
+                                "success": True,
+                                "converted": False,
+                                "enabled": True,
+                            }
+                        ),
+                        200,
+                    )
+                if _source_is_blank(doc):
+                    _enable_wiki_inline(conn, doc, owner)
+                    return make_response(
+                        jsonify(
+                            {
+                                "success": True,
+                                "converted": False,
+                                "enabled": True,
+                            }
+                        ),
+                        200,
+                    )
+        except Exception as err:
+            current_app.logger.error(
+                f"Error preparing wiki conversion for {source_id}: {err}",
+                exc_info=True,
+            )
+            return make_response(jsonify({"success": False}), 400)
+        try:
+            task = convert_source_to_wiki.delay(
+                source_id=resolved_source_id,
+                user=owner,
+                idempotency_key=f"convert-wiki:{resolved_source_id}",
+            )
+        except Exception as err:
+            current_app.logger.error(
+                f"Error starting wiki conversion for {source_id}: {err}",
+                exc_info=True,
+            )
+            return make_response(jsonify({"success": False}), 400)
+        return make_response(
+            jsonify({"success": True, "task_id": task.id}), 200
+        )
diff --git a/application/api/user/tasks.py b/application/api/user/tasks.py
index 9eed3202..4de4bc83 100644
--- a/application/api/user/tasks.py
+++ b/application/api/user/tasks.py
@@ -128,6 +128,15 @@ def reembed_wiki_page(
     return resp
 
 
+@celery.task(**DURABLE_TASK)
+@with_idempotency(task_name="convert_source_to_wiki")
+def convert_source_to_wiki(self, source_id, user, idempotency_key=None):
+    from application.worker import convert_source_to_wiki_worker
+
+    resp = convert_source_to_wiki_worker(self, source_id, user)
+    return resp
+
+
 # Beat-driven dispatch tasks default to ``acks_late=False``: a SIGKILL
 # of a beat tick is harmless to redeliver only if the dispatch itself is
 # idempotent. We keep these early-ACK so the broker doesn't replay a
diff --git a/application/storage/db/source_config.py b/application/storage/db/source_config.py
index 540073e7..845968af 100644
--- a/application/storage/db/source_config.py
+++ b/application/storage/db/source_config.py
@@ -117,6 +117,19 @@ class SourceConfig(BaseModel):
     chunking: ChunkingConfig = ChunkingConfig()
     retrieval: RetrievalConfig = RetrievalConfig()
 
+    def wiki_enabled(self) -> dict:
+        """Return a config dict flipped to wiki mode + browse-as-you-go exposure.
+
+        Sets ``kind="wiki"`` and defaults ``retrieval.exposure`` to
+        ``agentic_tool`` (a wiki is navigated, not bulk-prefetched), preserving
+        any non-default exposure the source already carries.
+        """
+        new_config = self.model_dump()
+        new_config["kind"] = "wiki"
+        if self.retrieval.exposure == "prefetch":
+            new_config["retrieval"]["exposure"] = "agentic_tool"
+        return new_config
+
     @classmethod
     def parse(cls, raw: Optional[dict]) -> "SourceConfig":
         """Lenient read: return all-defaults for ``{}``/``None``.
diff --git a/application/worker.py b/application/worker.py
index 7e61bc9c..0a8bc98e 100755
--- a/application/worker.py
+++ b/application/worker.py
@@ -39,7 +39,11 @@ from application.storage.db.repositories.ingest_chunk_progress import (
     IngestChunkProgressRepository,
 )
 from application.storage.db.repositories.sources import SourcesRepository
-from application.storage.db.repositories.wiki_pages import WikiPagesRepository
+from application.storage.db.repositories.wiki_pages import (
+    WikiPagesRepository,
+    _content_hash,
+    rebuild_wiki_directory_structure,
+)
 from application.storage.db.session import db_readonly, db_session
 from application.storage.db.source_config import SourceConfig
 from application.storage.storage_creator import StorageCreator
@@ -174,6 +178,25 @@ def _apply_display_names_to_structure(structure, file_name_map, prefix=""):
     return structure
 
 
+def _download_source_files_to_dir(storage, source_file_path, temp_dir):
+    """Mirror a source's stored files into ``temp_dir``, preserving structure."""
+    if not storage.is_directory(source_file_path):
+        return
+    for storage_file_path in storage.list_files(source_file_path):
+        if storage.is_directory(storage_file_path):
+            continue
+        rel_path = os.path.relpath(storage_file_path, source_file_path)
+        local_file_path = os.path.join(temp_dir, rel_path)
+        os.makedirs(os.path.dirname(local_file_path), exist_ok=True)
+        try:
+            file_data = storage.get_file(storage_file_path)
+            with open(local_file_path, "wb") as f:
+                f.write(file_data.read())
+        except Exception as e:
+            logging.error(f"Error downloading file {storage_file_path}: {e}")
+            continue
+
+
 # Define a function to generate a random string of a given length.
 
 
@@ -734,29 +757,7 @@ def reingest_source_worker(self, source_id, user):
         )
 
         with tempfile.TemporaryDirectory() as temp_dir:
-            # Download all files from storage to temp directory, preserving directory structure
-            if storage.is_directory(source_file_path):
-                files_list = storage.list_files(source_file_path)
-
-                for storage_file_path in files_list:
-                    if storage.is_directory(storage_file_path):
-                        continue
-
-                    rel_path = os.path.relpath(storage_file_path, source_file_path)
-                    local_file_path = os.path.join(temp_dir, rel_path)
-
-                    os.makedirs(os.path.dirname(local_file_path), exist_ok=True)
-
-                    # Download file
-                    try:
-                        file_data = storage.get_file(storage_file_path)
-                        with open(local_file_path, "wb") as f:
-                            f.write(file_data.read())
-                    except Exception as e:
-                        logging.error(
-                            f"Error downloading file {storage_file_path}: {e}"
-                        )
-                        continue
+            _download_source_files_to_dir(storage, source_file_path, temp_dir)
 
             reader = SimpleDirectoryReader(
                 input_dir=temp_dir,
@@ -2058,3 +2059,145 @@ def reembed_wiki_page_worker(self, source_id, path, content_hash, user):
         raise
 
     return {"status": "embedded", "added": added, "deleted": deleted}
+
+
+def _wiki_page_path_from_rel(rel_path):
+    """Build a validated leading-slash wiki page path, or None if invalid.
+
+    Runs the derived path through ``validate_tool_path`` so a stored filename
+    carrying traversal (``..``) never lands as a ``wiki_pages.path``.
+    """
+    from application.agents.tools.path_utils import validate_tool_path
+
+    raw = "/" + rel_path.replace(os.sep, "/").lstrip("/")
+    return validate_tool_path(raw)
+
+
+def convert_source_to_wiki_worker(self, source_id, user):
+    """Convert an ingested source into a wiki by materializing files as pages.
+
+    Re-parses the source's stored originals (the same storage file-load +
+    ``SimpleDirectoryReader`` machinery reingest uses), creating one wiki page
+    per file with extractable text. Non-text/binary/unsupported files are
+    skipped and reported. Embedding is enqueued per page (async); the source's
+    ``config.kind`` flips to ``wiki`` only after at least one page is
+    materialized — a source with no extractable pages keeps its original kind
+    and directory structure.
+
+    Args:
+        self: Celery task instance.
+        source_id: ID of the source to convert.
+        user: Owner identifier used to load the source row and author pages.
+
+    Returns:
+        A summary dict ``{"status": "converted", "pages_created", "skipped"}``,
+        ``{"status": "no_pages", ...}`` when nothing was extractable, or
+        ``{"status": "already_wiki"}`` when the source is already a wiki.
+    """
+    from application.api.user.tasks import reembed_wiki_page
+
+    source_id = str(source_id)
+
+    with db_readonly() as conn:
+        source = SourcesRepository(conn).get_any(source_id, user)
+    if not source:
+        raise ValueError(f"Source {source_id} not found or access denied")
+    source_id = str(source["id"])
+
+    cfg = SourceConfig.parse(source.get("config"))
+    if cfg.kind == "wiki":
+        return {"status": "already_wiki", "pages_created": 0, "skipped": []}
+
+    storage = StorageCreator.get_storage()
+    source_file_path = source.get("file_path", "")
+    file_name_map = _normalize_file_name_map(source.get("file_name_map"))
+
+    created_pages: list[tuple[str, str]] = []
+    skipped: list[dict] = []
+
+    stored_files: set[str] = set()
+    if storage.is_directory(source_file_path):
+        for stored in storage.list_files(source_file_path):
+            if storage.is_directory(stored):
+                continue
+            stored_files.add(os.path.relpath(stored, source_file_path))
+
+    with tempfile.TemporaryDirectory() as temp_dir:
+        _download_source_files_to_dir(storage, source_file_path, temp_dir)
+
+        reader = SimpleDirectoryReader(
+            input_dir=temp_dir,
+            recursive=True,
+            required_exts=list(SUPPORTED_SOURCE_EXTENSIONS),
+            exclude_hidden=True,
+            errors="ignore",
+            file_metadata=metadata_from_filename,
+        )
+        raw_docs = reader.load_data()
+
+        texts_by_rel: dict[str, list[str]] = {}
+        for doc in raw_docs:
+            extra_info = getattr(doc, "extra_info", None) or {}
+            rel_path = extra_info.get("source")
+            if not rel_path:
+                continue
+            text = getattr(doc, "text", None) or ""
+            if not text.strip():
+                continue
+            texts_by_rel.setdefault(rel_path, []).append(text)
+
+        with db_session() as conn:
+            repo = WikiPagesRepository(conn)
+            for rel_path in sorted(texts_by_rel):
+                page_path = _wiki_page_path_from_rel(rel_path)
+                if page_path is None:
+                    skipped.append({"file": rel_path, "reason": "invalid path"})
+                    continue
+                content = "\n\n".join(texts_by_rel[rel_path])
+                title = _get_display_name(file_name_map, rel_path) or os.path.basename(
+                    rel_path
+                )
+                repo.upsert(
+                    source_id, page_path, content, title=title, updated_by=user
+                )
+                created_pages.append((page_path, _content_hash(content)))
+
+        for rel_path in sorted(stored_files - set(texts_by_rel)):
+            ext = os.path.splitext(rel_path)[1].lower()
+            reason = (
+                "could not read/parse"
+                if ext in SUPPORTED_SOURCE_EXTENSIONS
+                else "no extractable text"
+            )
+            skipped.append({"file": rel_path, "reason": reason})
+
+        if created_pages:
+            with db_session() as conn:
+                rebuild_wiki_directory_structure(conn, source_id, user)
+
+    if not created_pages:
+        return {
+            "status": "no_pages",
+            "pages_created": 0,
+            "skipped": skipped,
+        }
+
+    for page_path, content_hash in created_pages:
+        reembed_wiki_page.delay(
+            source_id,
+            page_path,
+            content_hash,
+            user=user,
+            idempotency_key=f"reembed-wiki:{source_id}:{page_path}:{content_hash}",
+        )
+
+    with db_session() as conn:
+        SourcesRepository(conn).update(
+            source_id, user, {"config": cfg.wiki_enabled()}
+        )
+
+    return {
+        "status": "converted",
+        "pages_created": len(created_pages),
+        "skipped": skipped,
+    }
diff --git a/tests/api/user/sources/test_routes.py b/tests/api/user/sources/test_routes.py
index e3653c0f..739e1220 100644
--- a/tests/api/user/sources/test_routes.py
+++ b/tests/api/user/sources/test_routes.py
@@ -1029,3 +1029,108 @@ class TestSourceConfigResource:
         # owner-scoped read sees it.
         got = SourcesRepository(pg_conn).get_any(sid, owner)
         assert got["config"]["retrieval"]["chunks"] == 9
+
+    def test_kind_flip_to_wiki_rejected(self, app, pg_conn):
+        # Flipping kind to wiki must route through /wiki/convert, not config.
+        from application.api.user.sources.routes import SourceConfigResource
+        from application.storage.db.repositories.sources import SourcesRepository
+
+        user = "u-cfg-wiki-flip"
+        src = _seed_source(pg_conn, user, name="cfg-wiki", type="file")
+        sid = str(src["id"])
+
+        with _patch_db(pg_conn), app.test_request_context(
+            f"/api/sources/{sid}/config",
+            method="PATCH",
+            json={"kind": "wiki"},
+        ):
+            from flask import request
+            request.decoded_token = {"sub": user}
+            response = SourceConfigResource().patch(sid)
+
+        assert response.status_code == 400
+        # The kind must NOT have silently flipped.
+        from application.storage.db.source_config import SourceConfig
+
+        got = SourcesRepository(pg_conn).get_any(sid, user)
+        assert SourceConfig.parse(got.get("config")).kind != "wiki"
+
+    def test_other_edits_work_on_wiki_source(self, app, pg_conn):
+        # A wiki source can still edit retrieval (kind stays wiki, no reject).
+        from application.api.user.sources.routes import SourceConfigResource
+        from application.storage.db.repositories.sources import SourcesRepository
+
+        user = "u-cfg-wiki-edit"
+        src = _seed_source(
+            pg_conn, user, name="wiki-cfg", type="wiki",
+            config={"kind": "wiki"},
+        )
+        sid = str(src["id"])
+
+        with _patch_db(pg_conn), app.test_request_context(
+            f"/api/sources/{sid}/config",
+            method="PATCH",
+            json={"kind": "wiki", "retrieval": {"chunks": 4}},
+        ):
+            from flask import request
+            request.decoded_token = {"sub": user}
+            response = SourceConfigResource().patch(sid)
+
+        assert response.status_code == 200
+        got = SourcesRepository(pg_conn).get_any(sid, user)
+        assert got["config"]["retrieval"]["chunks"] == 4
+
+    def test_partial_edit_preserves_wiki_kind(self, app, pg_conn):
+        # A partial edit that OMITS kind must not demote a wiki to classic
+        # (SourceConfig.kind defaults to "classic" on a full-replace write).
+        from application.api.user.sources.routes import SourceConfigResource
+        from application.storage.db.repositories.sources import SourcesRepository
+        from application.storage.db.source_config import SourceConfig
+
+        user = "u-cfg-wiki-partial"
+        src = _seed_source(
+            pg_conn, user, name="wiki-partial", type="wiki",
+            config={"kind": "wiki"},
+        )
+        sid = str(src["id"])
+
+        with _patch_db(pg_conn), app.test_request_context(
+            f"/api/sources/{sid}/config",
+            method="PATCH",
+            json={"retrieval": {"chunks": 6}},
+        ):
+            from flask import request
+            request.decoded_token = {"sub": user}
+            response = SourceConfigResource().patch(sid)
+
+        assert response.status_code == 200
+        assert response.json["config"]["kind"] == "wiki"
+        got = SourcesRepository(pg_conn).get_any(sid, user)
+        assert SourceConfig.parse(got.get("config")).kind == "wiki"
+        assert got["config"]["retrieval"]["chunks"] == 6
+
+    def test_explicit_kind_demotion_from_wiki_rejected(self, app, pg_conn):
+        # Demoting wiki -> classic via config is rejected; use /wiki/convert.
+        from application.api.user.sources.routes import SourceConfigResource
+        from application.storage.db.repositories.sources import SourcesRepository
+        from application.storage.db.source_config import SourceConfig
+
+        user = "u-cfg-wiki-demote"
+        src = _seed_source(
+            pg_conn, user, name="wiki-demote", type="wiki",
+            config={"kind": "wiki"},
+        )
+        sid = str(src["id"])
+
+        with _patch_db(pg_conn), app.test_request_context(
+            f"/api/sources/{sid}/config",
+            method="PATCH",
+            json={"kind": "classic"},
+        ):
+            from flask import request
+            request.decoded_token = {"sub": user}
+            response = SourceConfigResource().patch(sid)
+
+        assert response.status_code == 400
+        got = SourcesRepository(pg_conn).get_any(sid, user)
+        assert SourceConfig.parse(got.get("config")).kind == "wiki"
diff --git a/tests/api/user/sources/test_wiki_routes.py b/tests/api/user/sources/test_wiki_routes.py
index 2233660c..89ce19d6 100644
--- a/tests/api/user/sources/test_wiki_routes.py
+++ b/tests/api/user/sources/test_wiki_routes.py
@@ -290,3 +290,276 @@ class TestWikiPage:
             request.decoded_token = {"sub": stranger}
             response = WikiPage().get(sid)
         assert response.status_code == 404
+
+
+class TestConvertSourceToWiki:
+    def test_returns_401_unauthenticated(self, app):
+        from application.api.user.sources.routes import ConvertSourceToWiki
+
+        with app.test_request_context(
+            "/api/sources/x/wiki/convert", method="POST"
+        ):
+            from flask import request
+            request.decoded_token = None
+            response = ConvertSourceToWiki().post("x")
+        assert response.status_code == 401
+
+    def test_blank_source_enabled_inline_no_task(self, app, pg_conn):
+        from application.api.user.sources.routes import ConvertSourceToWiki
+        from application.storage.db.repositories.sources import SourcesRepository
+        from application.storage.db.source_config import SourceConfig
+
+        user = "u-convert-blank"
+        src = SourcesRepository(pg_conn).create(
+            "blank", user_id=user, type="file", directory_structure={}
+        )
+        sid = str(src["id"])
+
+        with _patch_db(pg_conn), patch(
+            "application.api.user.sources.routes.convert_source_to_wiki.delay"
+        ) as mock_convert, app.test_request_context(
+            f"/api/sources/{sid}/wiki/convert", method="POST"
+        ):
+            from flask import request
+            request.decoded_token = {"sub": user}
+            response = ConvertSourceToWiki().post(sid)
+
+        assert response.status_code == 200
+        assert response.json["converted"] is False
+        assert response.json["enabled"] is True
+        mock_convert.assert_not_called()
+        got = SourcesRepository(pg_conn).get_any(sid, user)
+        cfg = SourceConfig.parse(got.get("config"))
+        assert cfg.kind == "wiki"
+        assert cfg.retrieval.exposure == "agentic_tool"
+
+    def test_fileful_source_enqueues_task(self, app, pg_conn):
+        from application.api.user.sources.routes import ConvertSourceToWiki
+        from application.storage.db.repositories.sources import SourcesRepository
+
+        user = "u-convert-files"
+        src = SourcesRepository(pg_conn).create(
+            "files", user_id=user, type="file",
+            directory_structure={"a.md": {"type": "text/markdown"}},
+        )
+        sid = str(src["id"])
+
+        fake_task = type("T", (), {"id": "task-xyz"})()
+        with _patch_db(pg_conn), patch(
+            "application.api.user.sources.routes.convert_source_to_wiki.delay",
+            return_value=fake_task,
+        ) as mock_convert, app.test_request_context(
+            f"/api/sources/{sid}/wiki/convert", method="POST"
+        ):
+            from flask import request
+            request.decoded_token = {"sub": user}
+            response = ConvertSourceToWiki().post(sid)
+
+        assert response.status_code == 200
+        assert response.json["task_id"] == "task-xyz"
+        mock_convert.assert_called_once()
+        assert mock_convert.call_args.kwargs["source_id"] == sid
+        assert mock_convert.call_args.kwargs["user"] == user
+        assert mock_convert.call_args.kwargs["idempotency_key"] == (
+            f"convert-wiki:{sid}"
+        )
+
+    def test_in_progress_ingest_rejected_409(self, app, pg_conn):
+        from application.api.user.sources.routes import ConvertSourceToWiki
+        from application.storage.db.repositories.ingest_chunk_progress import (
+            IngestChunkProgressRepository,
+        )
+        from application.storage.db.repositories.sources import SourcesRepository
+
+        user = "u-convert-ingesting"
+        src = SourcesRepository(pg_conn).create(
+            "ingesting", user_id=user, type="file",
+            directory_structure={"a.md": {"type": "text/markdown"}},
+        )
+        sid = str(src["id"])
+        # An active embed in flight (embedded 0 of 5) → "processing".
+        IngestChunkProgressRepository(pg_conn).init_progress(sid, 5)
+
+        with _patch_db(pg_conn), patch(
+            "application.api.user.sources.routes.convert_source_to_wiki.delay"
+        ) as mock_convert, app.test_request_context(
+            f"/api/sources/{sid}/wiki/convert", method="POST"
+        ):
+            from flask import request
+            request.decoded_token = {"sub": user}
+            response = ConvertSourceToWiki().post(sid)
+
+        assert response.status_code == 409
+        mock_convert.assert_not_called()
+
+    def test_viewer_rejected_403(self, app, pg_conn):
+        from application.api.user.sources.routes import ConvertSourceToWiki
+        from application.storage.db.repositories.sources import SourcesRepository
+
+        owner = "alice-convert"
+        viewer = "bob-convert-viewer"
+        src = SourcesRepository(pg_conn).create(
+            "files", user_id=owner, type="file",
+            directory_structure={"a.md": {"type": "text/markdown"}},
+        )
+        sid = str(src["id"])
+        _grant_team_access(pg_conn, owner, viewer, sid, "viewer")
+
+        with _patch_db(pg_conn), patch(
+            "application.api.user.sources.routes.convert_source_to_wiki.delay"
+        ) as mock_convert, app.test_request_context(
+            f"/api/sources/{sid}/wiki/convert", method="POST"
+        ):
+            from flask import request
+            request.decoded_token = {"sub": viewer}
+            response = ConvertSourceToWiki().post(sid)
+
+        assert response.status_code == 403
+        mock_convert.assert_not_called()
+
+
+class TestWikiPageEdit:
+    def test_returns_401_unauthenticated(self, app):
+        from application.api.user.sources.routes import WikiPage
+
+        with app.test_request_context(
+            "/api/sources/x/wiki/page", method="PUT", json={}
+        ):
+            from flask import request
+            request.decoded_token = None
+            response = WikiPage().put("x")
+        assert response.status_code == 401
+
+    def test_owner_writes_and_enqueues_reembed(self, app, pg_conn):
+        from application.api.user.sources.routes import WikiPage
+        from application.storage.db.repositories.sources import SourcesRepository
+        from application.storage.db.repositories.wiki_pages import WikiPagesRepository
+
+        user = "u-edit-owner"
+        src = SourcesRepository(pg_conn).create(
+            "wiki", user_id=user, type="wiki", config={"kind": "wiki"}
+        )
+        sid = str(src["id"])
+
+        with _patch_db(pg_conn), patch(
+            "application.api.user.sources.routes.reembed_wiki_page.delay"
+        ) as mock_reembed, app.test_request_context(
+            f"/api/sources/{sid}/wiki/page",
+            method="PUT",
+            json={"path": "/notes.md", "content": "body"},
+        ):
+            from flask import request
+            request.decoded_token = {"sub": user}
+            response = WikiPage().put(sid)
+
+        assert response.status_code == 200
+        assert response.json["page"]["path"] == "/notes.md"
+        assert response.json["page"]["version"] is not None
+        page = WikiPagesRepository(pg_conn).get_by_path(sid, "/notes.md")
+        assert page["content"] == "body"
+        mock_reembed.assert_called_once()
+        assert mock_reembed.call_args.args[1] == "/notes.md"
+        assert mock_reembed.call_args.kwargs["user"] == user
+
+    def test_team_editor_reembeds_as_owner(self, app, pg_conn):
+        from application.api.user.sources.routes import WikiPage
+        from application.storage.db.repositories.sources import SourcesRepository
+
+        owner = "alice-edit"
+        editor = "bob-edit-editor"
+        src = SourcesRepository(pg_conn).create(
+            "wiki", user_id=owner, type="wiki", config={"kind": "wiki"}
+        )
+        sid = str(src["id"])
+        _grant_team_access(pg_conn, owner, editor, sid, "editor")
+
+        with _patch_db(pg_conn), patch(
+            "application.api.user.sources.routes.reembed_wiki_page.delay"
+        ) as mock_reembed, app.test_request_context(
+            f"/api/sources/{sid}/wiki/page",
+            method="PUT",
+            json={"path": "/e.md", "content": "edited"},
+        ):
+            from flask import request
+            request.decoded_token = {"sub": editor}
+            response = WikiPage().put(sid)
+
+        assert response.status_code == 200
+        # Re-embed runs AS the owner so the owner-scoped worker load resolves.
+        assert mock_reembed.call_args.kwargs["user"] == owner
+
+    def test_stale_version_returns_409(self, app, pg_conn):
+        from application.api.user.sources.routes import WikiPage
+        from application.storage.db.repositories.sources import SourcesRepository
+        from application.storage.db.repositories.wiki_pages import WikiPagesRepository
+
+        user = "u-edit-conflict"
+        src = SourcesRepository(pg_conn).create(
+            "wiki", user_id=user, type="wiki", config={"kind": "wiki"}
+        )
+        sid = str(src["id"])
+        WikiPagesRepository(pg_conn).upsert(sid, "/c.md", "v1", updated_by=user)
+        # Bump to version 2 so a stale expected_version=1 loses the race.
+        WikiPagesRepository(pg_conn).upsert(sid, "/c.md", "v2", updated_by=user)
+
+        with _patch_db(pg_conn), patch(
+            "application.api.user.sources.routes.reembed_wiki_page.delay"
+        ) as mock_reembed, app.test_request_context(
+            f"/api/sources/{sid}/wiki/page",
+            method="PUT",
+            json={"path": "/c.md", "content": "v3", "expected_version": 1},
+        ):
+            from flask import request
+            request.decoded_token = {"sub": user}
+            response = WikiPage().put(sid)
+
+        assert response.status_code == 409
+        mock_reembed.assert_not_called()
+
+    def test_traversal_path_returns_400(self, app, pg_conn):
+        from application.api.user.sources.routes import WikiPage
+        from application.storage.db.repositories.sources import SourcesRepository
+
+        user = "u-edit-traversal"
+        src = SourcesRepository(pg_conn).create(
+            "wiki", user_id=user, type="wiki", config={"kind": "wiki"}
+        )
+        sid = str(src["id"])
+
+        with _patch_db(pg_conn), patch(
+            "application.api.user.sources.routes.reembed_wiki_page.delay"
+        ), app.test_request_context(
+            f"/api/sources/{sid}/wiki/page",
+            method="PUT",
+            json={"path": "/../secret.md", "content": "x"},
+        ):
+            from flask import request
+            request.decoded_token = {"sub": user}
+            response = WikiPage().put(sid)
+        assert response.status_code == 400
+
+    def test_viewer_rejected_403(self, app, pg_conn):
+        from application.api.user.sources.routes import WikiPage
+        from application.storage.db.repositories.sources import SourcesRepository
+
+        owner = "alice-edit-viewer"
+        viewer = "bob-edit-viewer"
+        src = SourcesRepository(pg_conn).create(
+            "wiki", user_id=owner, type="wiki", config={"kind": "wiki"}
+        )
+        sid = str(src["id"])
+        _grant_team_access(pg_conn, owner, viewer, sid, "viewer")
+
+        with _patch_db(pg_conn), patch(
+            "application.api.user.sources.routes.reembed_wiki_page.delay"
+        ) as mock_reembed, app.test_request_context(
+            f"/api/sources/{sid}/wiki/page",
+            method="PUT",
+            json={"path": "/v.md", "content": "x"},
+        ):
+            from flask import request
+            request.decoded_token = {"sub": viewer}
+            response = WikiPage().put(sid)
+
+        assert response.status_code == 403
+        mock_reembed.assert_not_called()
diff --git a/tests/api/user/test_tasks.py b/tests/api/user/test_tasks.py
index a27e5856..b38c065a 100644
--- a/tests/api/user/test_tasks.py
+++ b/tests/api/user/test_tasks.py
@@ -86,6 +86,20 @@ class TestReingestSourceTask:
         assert result == {"status": "ok"}
 
 
+class TestConvertSourceToWikiTask:
+    @pytest.mark.unit
+    @patch("application.worker.convert_source_to_wiki_worker")
+    def test_calls_convert_worker(self, mock_worker):
+        from application.api.user.tasks import convert_source_to_wiki
+
+        mock_worker.return_value = {"status": "converted"}
+
+        result = convert_source_to_wiki("source123", "user1")
+
+        mock_worker.assert_called_once_with(ANY, "source123", "user1")
+        assert result == {"status": "converted"}
+
+
 class TestScheduleSyncsTask:
     @pytest.mark.unit
     @patch("application.api.user.tasks.sync_worker")
@@ -286,6 +300,8 @@ class TestDurableTaskRetryPolicy:
             "store_attachment",
             "process_agent_webhook",
             "ingest_connector_task",
+            "reembed_wiki_page",
+            "convert_source_to_wiki",
         ],
     )
     def test_task_has_retry_config(self, task_name):
diff --git a/tests/worker/test_convert_source_to_wiki.py b/tests/worker/test_convert_source_to_wiki.py
new file mode 100644
index 00000000..8347b55b
--- /dev/null
+++ b/tests/worker/test_convert_source_to_wiki.py
@@ -0,0 +1,305 @@
+"""Tests for ``application.worker.convert_source_to_wiki_worker``.
+
+The worker re-parses a source's stored originals into wiki pages and enqueues
+a per-page re-embed. Storage, ``SimpleDirectoryReader``, and the re-embed task
+are mocked so no real downloads or embeddings run; the ``sources`` /
+``wiki_pages`` rows are real so the assertions read them back.
+"""
+
+from __future__ import annotations
+
+from unittest.mock import MagicMock
+
+import pytest
+
+from application.parser.schema.base import Document
+from application.storage.db.repositories.sources import SourcesRepository
+from application.storage.db.repositories.wiki_pages import WikiPagesRepository
+
+
+def _seed_source(pg_conn, config=None, file_path="inputs/alice/doc-set"):
+    src = SourcesRepository(pg_conn).create(
+        "doc-set",
+        user_id="alice",
+        type="local",
+        retriever="classic",
+        file_path=file_path,
+        config=config or {},
+        directory_structure={"a.md": {"type": "text/markdown", "size_bytes": 1}},
+    )
+    return str(src["id"])
+
+
+def _patch_storage(monkeypatch, stored_files):
+    """Storage whose directory holds ``stored_files`` (rel paths)."""
+    from application import worker
+
+    base = "inputs/alice/doc-set"
+    storage = MagicMock(name="storage")
+    storage.is_directory.side_effect = lambda p: p == base
+    storage.list_files.return_value = [f"{base}/{f}" for f in stored_files]
+    storage.get_file.return_value = MagicMock(read=lambda: b"x")
+    monkeypatch.setattr(worker.StorageCreator, "get_storage", lambda: storage)
+    return storage
+
+
+def _patch_reader(monkeypatch, docs):
+    from application import worker
+
+    reader = MagicMock(name="reader")
+    reader.load_data.return_value = docs
+    monkeypatch.setattr(worker, "SimpleDirectoryReader", lambda *a, **kw: reader)
+    return reader
+
+
+@pytest.mark.unit
+class TestConvertSourceToWikiWorker:
+    def test_one_page_per_text_file(
+        self, pg_conn, patch_worker_db, task_self, monkeypatch
+    ):
+        from application import worker
+
+        source_id = _seed_source(pg_conn)
+        _patch_storage(monkeypatch, ["guide.md", "notes/intro.md", "logo.png"])
+        _patch_reader(
+            monkeypatch,
+            [
+                Document(text="guide body", extra_info={"source": "guide.md"}),
+                Document(
+                    text="intro body", extra_info={"source": "notes/intro.md"}
+                ),
+            ],
+        )
+        delay = MagicMock(name="reembed_delay")
+        monkeypatch.setattr(
+            "application.api.user.tasks.reembed_wiki_page.delay", delay
+        )
+
+        result = worker.convert_source_to_wiki_worker(
+            task_self, source_id, "alice"
+        )
+
+        assert result["status"] == "converted"
+        assert result["pages_created"] == 2
+
+        pages = WikiPagesRepository(pg_conn).list_for_source(source_id)
+        by_path = {p["path"]: p for p in pages}
+        assert set(by_path) == {"/guide.md", "/notes/intro.md"}
+        assert by_path["/guide.md"]["content"] == "guide body"
+        assert by_path["/guide.md"]["title"] == "guide.md"
+        assert by_path["/notes/intro.md"]["title"] == "intro.md"
+
+    def test_binaries_skipped_and_reported(
+        self, pg_conn, patch_worker_db, task_self, monkeypatch
+    ):
+        from application import worker
+
+        source_id = _seed_source(pg_conn)
+        _patch_storage(monkeypatch, ["guide.md", "logo.png", "scan.pdf"])
+        _patch_reader(
+            monkeypatch,
+            [Document(text="guide body", extra_info={"source": "guide.md"})],
+        )
+        monkeypatch.setattr(
+            "application.api.user.tasks.reembed_wiki_page.delay", MagicMock()
+        )
+
+        result = worker.convert_source_to_wiki_worker(
+            task_self, source_id, "alice"
+        )
+
+        assert result["pages_created"] == 1
+        skipped_files = {s["file"] for s in result["skipped"]}
+        assert skipped_files == {"logo.png", "scan.pdf"}
+        for entry in result["skipped"]:
+            assert entry["reason"]
+
+    def test_reembed_enqueued_per_page_with_per_page_key(
+        self, pg_conn, patch_worker_db, task_self, monkeypatch
+    ):
+        from application import worker
+
+        source_id = _seed_source(pg_conn)
+        _patch_storage(monkeypatch, ["a.md", "b.md"])
+        _patch_reader(
+            monkeypatch,
+            [
+                Document(text="aaa", extra_info={"source": "a.md"}),
+                Document(text="bbb", extra_info={"source": "b.md"}),
+            ],
+        )
+        delay = MagicMock(name="reembed_delay")
+        monkeypatch.setattr(
+            "application.api.user.tasks.reembed_wiki_page.delay", delay
+        )
+
+        worker.convert_source_to_wiki_worker(task_self, source_id, "alice")
+
+        assert delay.call_count == 2
+        keys = {c.kwargs["idempotency_key"] for c in delay.call_args_list}
+        paths = {c.args[1] for c in delay.call_args_list}
+        assert paths == {"/a.md", "/b.md"}
+        for call in delay.call_args_list:
+            assert call.args[0] == source_id
+            assert call.kwargs["user"] == "alice"
+            assert call.kwargs["idempotency_key"].startswith(
+                f"reembed-wiki:{source_id}:"
+            )
+        assert len(keys) == 2
+
+    def test_sets_kind_wiki_and_agentic_exposure(
+        self, pg_conn, patch_worker_db, task_self, monkeypatch
+    ):
+        from application import worker
+        from application.storage.db.source_config import SourceConfig
+
+        source_id = _seed_source(pg_conn)
+        _patch_storage(monkeypatch, ["a.md"])
+        _patch_reader(
+            monkeypatch,
+            [Document(text="aaa", extra_info={"source": "a.md"})],
+        )
+        monkeypatch.setattr(
+            "application.api.user.tasks.reembed_wiki_page.delay", MagicMock()
+        )
+
+        worker.convert_source_to_wiki_worker(task_self, source_id, "alice")
+
+        refreshed = SourcesRepository(pg_conn).get_any(source_id, "alice")
+        cfg = SourceConfig.parse(refreshed.get("config"))
+        assert cfg.kind == "wiki"
+        assert cfg.retrieval.exposure == "agentic_tool"
+
+    def test_preserves_non_default_exposure(
+        self, pg_conn, patch_worker_db, task_self, monkeypatch
+    ):
+        from application import worker
+        from application.storage.db.source_config import SourceConfig
+
+        source_id = _seed_source(
+            pg_conn, config={"retrieval": {"exposure": "agentic_tool"}}
+        )
+        _patch_storage(monkeypatch, ["a.md"])
+        _patch_reader(
+            monkeypatch,
+            [Document(text="aaa", extra_info={"source": "a.md"})],
+        )
+        monkeypatch.setattr(
+            "application.api.user.tasks.reembed_wiki_page.delay", MagicMock()
+        )
+
+        worker.convert_source_to_wiki_worker(task_self, source_id, "alice")
+
+        refreshed = SourcesRepository(pg_conn).get_any(source_id, "alice")
+        cfg = SourceConfig.parse(refreshed.get("config"))
+        assert cfg.kind == "wiki"
+        assert cfg.retrieval.exposure == "agentic_tool"
+
+    def test_no_pages_leaves_kind_and_structure(
+        self, pg_conn, patch_worker_db, task_self, monkeypatch
+    ):
+        from application import worker
+        from application.storage.db.source_config import SourceConfig
+
+        original_structure = {"a.md": {"type": "text/markdown", "size_bytes": 1}}
+        source_id = _seed_source(pg_conn)
+        _patch_storage(monkeypatch, ["logo.png", "scan.pdf"])
+        _patch_reader(monkeypatch, [])
+        rebuild = MagicMock(name="rebuild")
+        monkeypatch.setattr(
+            worker, "rebuild_wiki_directory_structure", rebuild
+        )
+        delay = MagicMock(name="reembed_delay")
+        monkeypatch.setattr(
+            "application.api.user.tasks.reembed_wiki_page.delay", delay
+        )
+
+        result = worker.convert_source_to_wiki_worker(
+            task_self, source_id, "alice"
+        )
+
+        assert result["status"] == "no_pages"
+        assert result["pages_created"] == 0
+        assert result["skipped"]
+        rebuild.assert_not_called()
+        delay.assert_not_called()
+
+        refreshed = SourcesRepository(pg_conn).get_any(source_id, "alice")
+        assert SourceConfig.parse(refreshed.get("config")).kind != "wiki"
+        assert refreshed.get("directory_structure") == original_structure
+
+    def test_traversal_filename_skipped(
+        self, pg_conn, patch_worker_db, task_self, monkeypatch
+    ):
+        from application import worker
+
+        source_id = _seed_source(pg_conn)
+        _patch_storage(monkeypatch, ["ok.md", "../evil.md"])
+        _patch_reader(
+            monkeypatch,
+            [
+                Document(text="good", extra_info={"source": "ok.md"}),
+                Document(text="bad", extra_info={"source": "../evil.md"}),
+            ],
+        )
+        monkeypatch.setattr(
+            "application.api.user.tasks.reembed_wiki_page.delay", MagicMock()
+        )
+
+        result = worker.convert_source_to_wiki_worker(
+            task_self, source_id, "alice"
+        )
+
+        assert result["pages_created"] == 1
+        pages = WikiPagesRepository(pg_conn).list_for_source(source_id)
+        assert {p["path"] for p in pages} == {"/ok.md"}
+        skipped = {(s["file"], s["reason"]) for s in result["skipped"]}
+        assert ("../evil.md", "invalid path") in skipped
+
+    def test_parse_failure_reason_distinct_from_binary(
+        self, pg_conn, patch_worker_db, task_self, monkeypatch
+    ):
+        from application import worker
+
+        source_id = _seed_source(pg_conn)
+        # broken.md has a supported extension but produced no doc (parse/read
+        # failure); blob.bin is an unsupported/binary file.
+        _patch_storage(monkeypatch, ["guide.md", "broken.md", "blob.bin"])
+        _patch_reader(
+            monkeypatch,
+            [Document(text="guide body", extra_info={"source": "guide.md"})],
+        )
+        monkeypatch.setattr(
+            "application.api.user.tasks.reembed_wiki_page.delay", MagicMock()
+        )
+
+        result = worker.convert_source_to_wiki_worker(
+            task_self, source_id, "alice"
+        )
+
+        reasons = {s["file"]: s["reason"] for s in result["skipped"]}
+        assert reasons["broken.md"] == "could not read/parse"
+        assert reasons["blob.bin"] == "no extractable text"
+
+    def test_already_wiki_returns_early(
+        self, pg_conn, patch_worker_db, task_self, monkeypatch
+    ):
+        from application import worker
+
+        source_id = _seed_source(pg_conn, config={"kind": "wiki"})
+        reader = MagicMock(name="reader")
+        monkeypatch.setattr(
+            worker, "SimpleDirectoryReader", lambda *a, **kw: reader
+        )
+        delay = MagicMock(name="reembed_delay")
+        monkeypatch.setattr(
+            "application.api.user.tasks.reembed_wiki_page.delay", delay
+        )
+
+        result = worker.convert_source_to_wiki_worker(
+            task_self, source_id, "alice"
+        )
+
+        assert result["status"] == "already_wiki"
+        reader.load_data.assert_not_called()
+        delay.assert_not_called()