diff --git a/poetry.lock b/poetry.lock
index b68a58e..bab04ff 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -602,6 +602,23 @@ files = [
 [package.dependencies]
 colorama = {version = "*", markers = "platform_system == \"Windows\""}
 
+[[package]]
+name = "click-default-group"
+version = "1.2.4"
+description = "click_default_group"
+optional = true
+python-versions = ">=2.7"
+files = [
+    {file = "click_default_group-1.2.4-py2.py3-none-any.whl", hash = "sha256:9b60486923720e7fc61731bdb32b617039aba820e22e1c88766b1125592eaa5f"},
+    {file = "click_default_group-1.2.4.tar.gz", hash = "sha256:eb3f3c99ec0d456ca6cd2a7f08f7d4e91771bef51b01bdd9580cc6450fe1251e"},
+]
+
+[package.dependencies]
+click = "*"
+
+[package.extras]
+test = ["pytest"]
+
 [[package]]
 name = "colorama"
 version = "0.4.6"
@@ -2032,6 +2049,34 @@ files = [
 httpx = ">=0.20.0"
 pydantic = ">=1.10"
 
+[[package]]
+name = "llm"
+version = "0.14"
+description = "A CLI utility and Python library for interacting with Large Language Models, including OpenAI, PaLM and local models installed on your own machine."
+optional = true
+python-versions = ">=3.8"
+files = [
+    {file = "llm-0.14-py3-none-any.whl", hash = "sha256:bb3bd50a1ff47d5acc43709b0d01394e2384cd91e291a68500b00ad154831943"},
+    {file = "llm-0.14.tar.gz", hash = "sha256:c4150eb47246342846cf57497304ed9afb918a94c5a39049e7422f1961371c09"},
+]
+
+[package.dependencies]
+click = "*"
+click-default-group = ">=1.2.3"
+openai = ">=1.0"
+pip = "*"
+pluggy = "*"
+pydantic = ">=1.10.2"
+pyreadline3 = {version = "*", markers = "sys_platform == \"win32\""}
+python-ulid = "*"
+PyYAML = "*"
+setuptools = "*"
+sqlite-migrate = ">=0.1a2"
+sqlite-utils = ">=3.35.0"
+
+[package.extras]
+test = ["black (>=24.1.0)", "cogapp", "mypy (>=1.10.0)", "numpy", "pytest", "pytest-httpx", "ruff", "types-PyYAML", "types-click", "types-setuptools"]
+
 [[package]]
 name = "markdown-it-py"
 version = "3.0.0"
@@ -2947,6 +2992,17 @@ tests = ["check-manifest", "coverage", "defusedxml", "markdown2", "olefile", "pa
 typing = ["typing-extensions"]
 xmp = ["defusedxml"]
 
+[[package]]
+name = "pip"
+version = "24.0"
+description = "The PyPA recommended tool for installing Python packages."
+optional = true
+python-versions = ">=3.7"
+files = [
+    {file = "pip-24.0-py3-none-any.whl", hash = "sha256:ba0d021a166865d2265246961bec0152ff124de910c5cc39f1156ce3fa7c69dc"},
+    {file = "pip-24.0.tar.gz", hash = "sha256:ea9bd1a847e8c5774a5777bb398c19e80bcd4e2aa16a4b301b718fe6f593aba2"},
+]
+
 [[package]]
 name = "pkginfo"
 version = "1.11.1"
@@ -3395,6 +3451,17 @@ files = [
     {file = "pyproject_hooks-1.1.0.tar.gz", hash = "sha256:4b37730834edbd6bd37f26ece6b44802fb1c1ee2ece0e54ddff8bfc06db86965"},
 ]
 
+[[package]]
+name = "pyreadline3"
+version = "3.4.1"
+description = "A python implementation of GNU readline."
+optional = true
+python-versions = "*"
+files = [
+    {file = "pyreadline3-3.4.1-py3-none-any.whl", hash = "sha256:b0efb6516fd4fb07b45949053826a62fa4cb353db5be2bbb4a7aa1fdd1e345fb"},
+    {file = "pyreadline3-3.4.1.tar.gz", hash = "sha256:6f3d1f7b8a31ba32b73917cefc1f28cc660562f39aea8646d30bd6eff21f7bae"},
+]
+
 [[package]]
 name = "pytest"
 version = "8.2.2"
@@ -3447,6 +3514,20 @@ files = [
 [package.dependencies]
 six = ">=1.5"
 
+[[package]]
+name = "python-ulid"
+version = "2.6.0"
+description = "Universally unique lexicographically sortable identifier"
+optional = true
+python-versions = ">=3.9"
+files = [
+    {file = "python_ulid-2.6.0-py3-none-any.whl", hash = "sha256:b47cc7a427b82f7526af96385d7702685df808e9b4922523dd5988a3ba98a89d"},
+    {file = "python_ulid-2.6.0.tar.gz", hash = "sha256:904e19093dd6578a5ce01a8274e3e228d556d47be3bda328da2d3601c5240c4f"},
+]
+
+[package.extras]
+pydantic = ["pydantic (>=2.0)"]
+
 [[package]]
 name = "pytz"
 version = "2024.1"
@@ -4057,6 +4138,21 @@ transformers = ">=4.34.0,<5.0.0"
 [package.extras]
 dev = ["pre-commit", "pytest", "ruff (>=0.3.0)"]
 
+[[package]]
+name = "setuptools"
+version = "70.0.0"
+description = "Easily download, build, install, upgrade, and uninstall Python packages"
+optional = true
+python-versions = ">=3.8"
+files = [
+    {file = "setuptools-70.0.0-py3-none-any.whl", hash = "sha256:54faa7f2e8d2d11bcd2c07bed282eef1046b5c080d1c32add737d7b5817b1ad4"},
+    {file = "setuptools-70.0.0.tar.gz", hash = "sha256:f211a66637b8fa059bb28183da127d4e86396c991a942b028c6650d4319c3fd0"},
+]
+
+[package.extras]
+docs = ["furo", "jaraco.packaging (>=9.3)", "jaraco.tidelift (>=1.4)", "pygments-github-lexers (==0.0.5)", "pyproject-hooks (!=1.1)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-favicon", "sphinx-inline-tabs", "sphinx-lint", "sphinx-notfound-page (>=1,<2)", "sphinx-reredirects", "sphinxcontrib-towncrier"]
+testing = ["build[virtualenv] (>=1.0.3)", "filelock (>=3.4.0)", "importlib-metadata", "ini2toml[lite] (>=0.14)", "jaraco.develop (>=7.21)", "jaraco.envs (>=2.2)", "jaraco.path (>=3.2.0)", "mypy (==1.9)", "packaging (>=23.2)", "pip (>=19.1)", "pyproject-hooks (!=1.1)", "pytest (>=6,!=8.1.1)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=2.2)", "pytest-home (>=0.5)", "pytest-mypy", "pytest-perf", "pytest-ruff (>=0.2.1)", "pytest-subprocess", "pytest-timeout", "pytest-xdist (>=3)", "tomli", "tomli-w (>=1.0.0)", "virtualenv (>=13.0.0)", "wheel"]
+
 [[package]]
 name = "shellingham"
 version = "1.5.4"
@@ -4213,6 +4309,63 @@ postgresql-psycopgbinary = ["psycopg[binary] (>=3.0.7)"]
 pymysql = ["pymysql"]
 sqlcipher = ["sqlcipher3_binary"]
 
+[[package]]
+name = "sqlite-fts4"
+version = "1.0.3"
+description = "Python functions for working with SQLite FTS4 search"
+optional = true
+python-versions = "*"
+files = [
+    {file = "sqlite-fts4-1.0.3.tar.gz", hash = "sha256:78b05eeaf6680e9dbed8986bde011e9c086a06cb0c931b3cf7da94c214e8930c"},
+    {file = "sqlite_fts4-1.0.3-py3-none-any.whl", hash = "sha256:0359edd8dea6fd73c848989e1e2b1f31a50fe5f9d7272299ff0e8dbaa62d035f"},
+]
+
+[package.extras]
+test = ["pytest"]
+
+[[package]]
+name = "sqlite-migrate"
+version = "0.1b0"
+description = "A simple database migration system for SQLite, based on sqlite-utils"
+optional = true
+python-versions = "*"
+files = [
+    {file = "sqlite-migrate-0.1b0.tar.gz", hash = "sha256:8d502b3ca4b9c45e56012bd35c03d23235f0823c976d4ce940cbb40e33087ded"},
+    {file = "sqlite_migrate-0.1b0-py3-none-any.whl", hash = "sha256:a4125e35e1de3dc56b6b6ec60e9833ce0ce20192b929ddcb2d4246c5098859c6"},
+]
+
+[package.dependencies]
+sqlite-utils = "*"
+
+[package.extras]
+test = ["black", "mypy", "pytest", "ruff"]
+
+[[package]]
+name = "sqlite-utils"
+version = "3.36"
+description = "CLI tool and Python library for manipulating SQLite databases"
+optional = true
+python-versions = ">=3.7"
+files = [
+    {file = "sqlite-utils-3.36.tar.gz", hash = "sha256:dcc311394fe86dc16f65037b0075e238efcfd2e12e65d53ed196954502996f3c"},
+    {file = "sqlite_utils-3.36-py3-none-any.whl", hash = "sha256:b71e829755c2efbdcd6931a31968dee4e8bd71b3c14f0fe648b22377027c5bec"},
+]
+
+[package.dependencies]
+click = "*"
+click-default-group = ">=1.2.3"
+pluggy = "*"
+python-dateutil = "*"
+sqlite-fts4 = "*"
+tabulate = "*"
+
+[package.extras]
+docs = ["beanbag-docutils (>=2.0)", "codespell", "furo", "pygments-csv-lexer", "sphinx-autobuild", "sphinx-copybutton"]
+flake8 = ["flake8"]
+mypy = ["data-science-types", "mypy", "types-click", "types-pluggy", "types-python-dateutil", "types-tabulate"]
+test = ["black", "cogapp", "hypothesis", "pytest"]
+tui = ["trogon"]
+
 [[package]]
 name = "stack-data"
 version = "0.6.3"
@@ -4274,6 +4427,20 @@ files = [
 [package.dependencies]
 mpmath = ">=1.1.0,<1.4.0"
 
+[[package]]
+name = "tabulate"
+version = "0.9.0"
+description = "Pretty-print tabular data"
+optional = true
+python-versions = ">=3.7"
+files = [
+    {file = "tabulate-0.9.0-py3-none-any.whl", hash = "sha256:024ca478df22e9340661486f85298cff5f6dcdba14f3813e8830015b9ed1948f"},
+    {file = "tabulate-0.9.0.tar.gz", hash = "sha256:0095b12bf5966de529c0feb1fa08671671b3368eec77d7ef7ab114be2c068b3c"},
+]
+
+[package.extras]
+widechars = ["wcwidth"]
+
 [[package]]
 name = "tbb"
 version = "2021.12.0"
@@ -5093,8 +5260,9 @@ test = ["big-O", "importlib-resources", "jaraco.functools", "jaraco.itertools",
 [extras]
 api-bot = ["fastapi", "pydantic", "requests", "uvicorn"]
 azure = ["azure-storage-file-share", "pulumi", "pulumi-azure-native"]
+llm-plugin = ["llm"]
 
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.11,<3.12"
-content-hash = "4d7330aee8ed44e7b403e2a21fc304c310e2ae5f9fba6a72079257869506a085"
+content-hash = "681b846e7164e161de73ba842b75f1e2b56b2de708698e0c52e236f0af5c0c9c"
diff --git a/pyproject.toml b/pyproject.toml
index ff73adc..a3348bf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,7 +51,7 @@ llama-index-readers-github = "^0.1.9"
 tiktoken = "^0.7.0"
 typer = "^0.12.3"
 rich = "^13.7.1"
-
+llm = { version="^0.14", optional=true }
 
 [tool.poetry.group.dev.dependencies]
 black = "^24.3.0"
@@ -74,6 +74,9 @@ azure = [
     "pulumi-azure-native",
     "azure-storage-file-share",
 ]
+llm_plugin = [
+    "llm",
+]
 
 [tool.poetry.scripts]
 reginald = "reginald.cli:cli"
@@ -82,6 +85,9 @@ reginald = "reginald.cli:cli"
 name = "PyPI"
 priority = "primary"
 
+[tool.poetry.plugins."llm"]
+reginald = "reginald.llm_reginald.llm_reginald"
+
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"
diff --git a/reginald/llm_reginald/README.md b/reginald/llm_reginald/README.md
new file mode 100644
index 0000000..127f7b9
--- /dev/null
+++ b/reginald/llm_reginald/README.md
@@ -0,0 +1,19 @@
+# llm-reginald
+
+This module contains an [LLM](https://llm.datasette.io/) plugin for interacting with [Reginald](https://github.com/alan-turing-institute/reginald).
+
+The plugin is available to use immediately after reginald is installed, as long as the `llm_plugin` extra dependencies are selected when installing the package (either with `pip install .[llm_plugin]` or `poetry install --extras llm_plugin` or `poetry install --all-extras`).
+
+The plugin requires a running Reginald server to work.  By default this is assumed to be at `http://localhost:8000`.  Refer to the package README for instructions.
+
+Assuming [LLM](http://llm.datasette.io/) is installed, you can interact with Reginald like this:
+
+```
+llm -m reginald 'Who are you?'
+```
+
+Using a different server URL:
+
+```
+llm -m reginald -o server_url <server_url> ...
+```
diff --git a/reginald/llm_reginald/__init__.py b/reginald/llm_reginald/__init__.py
new file mode 100644
index 0000000..df0f741
--- /dev/null
+++ b/reginald/llm_reginald/__init__.py
@@ -0,0 +1 @@
+from reginald.llm_reginald import *
diff --git a/reginald/llm_reginald/llm_reginald.py b/reginald/llm_reginald/llm_reginald.py
new file mode 100644
index 0000000..f6d9ad0
--- /dev/null
+++ b/reginald/llm_reginald/llm_reginald.py
@@ -0,0 +1,60 @@
+import uuid
+from typing import Optional
+from urllib.parse import urljoin
+
+import httpx
+import llm
+from pydantic import Field
+
+
+@llm.hookimpl
+def register_models(register):
+    register(Reginald())
+
+
+class Reginald(llm.Model):
+    model_id = "reginald"
+    can_stream = False
+
+    class Options(llm.Options):
+        server_url: str = Field(
+            default="http://localhost:8000",
+            title="Server URL",
+            description="The base URL of the Reginald server",
+        )
+
+        def direct_message_endpoint(self):
+            return urljoin(self.server_url, "direct_message")
+
+    def execute(self, prompt, stream, response, conversation):
+
+        message = prompt.prompt
+
+        # Reginald keeps a separate conversation history for each
+        # "user_id".  If 'conversation' is None (or doesn't have the
+        # user_id logged) start a new conversation by minting a new
+        # user_id history.  Otherwise, extract the logged user_id to
+        # continue that conversation.
+
+        try:
+            user_id = conversation.responses[0].response_json["user_id"]
+        except (TypeError, AttributeError, KeyError, IndexError) as e:
+            user_id = str(uuid.uuid4().int)
+
+        try:
+            with httpx.Client() as client:
+                reginald_reply = client.post(
+                    prompt.options.direct_message_endpoint(),
+                    json={"message": message, "user_id": user_id},
+                    timeout=None,
+                )
+            reginald_reply.raise_for_status()
+        except httpx.HTTPError as e:
+            # re-raise as an llm.ModelError for llm to report
+            raise llm.ModelError(
+                f"Could not connect to Reginald at {prompt.options.direct_message_endpoint()}.\n\nThe error was:\n    {e}.\n\nIs the model server running?"
+            )
+
+        yield reginald_reply.json()["message"]
+
+        response.response_json = {"user_id": user_id}