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llm-claude.el
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;;; llm-claude.el --- llm module for integrating with Claude -*- lexical-binding: t; package-lint-main-file: "llm.el"; -*-
;; Copyright (c) 2024-2025 Free Software Foundation, Inc.
;; Author: Andrew Hyatt <[email protected]>
;; Homepage: https://github.com/ahyatt/llm
;; SPDX-License-Identifier: GPL-3.0-or-later
;;
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
;; published by the Free Software Foundation; either version 3 of the
;; License, or (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; This file implements the llm functionality defined in llm.el, for Claude's
;; API.
;;; Code:
(require 'llm)
(require 'llm-provider-utils)
(require 'plz-event-source)
(require 'rx)
;; Models defined at https://docs.anthropic.com/claude/docs/models-overview
(cl-defstruct (llm-claude (:include llm-standard-chat-provider))
(key nil :read-only t)
(chat-model "claude-3-5-sonnet-20241022" :read-only t))
(cl-defmethod llm-nonfree-message-info ((_ llm-claude))
"Return Claude's nonfree ToS."
"https://www.anthropic.com/legal/consumer-terms")
(cl-defmethod llm-provider-prelude ((provider llm-claude))
(unless (llm-claude-key provider)
(error "No API key provided for Claude")))
(defun llm-claude--tool-call (tool)
"A Claude version of a function spec for TOOL."
`(:name ,(llm-tool-name tool)
:description ,(llm-tool-description tool)
:input_schema ,(llm-provider-utils-openai-arguments
(llm-tool-args tool))))
(cl-defmethod llm-provider-chat-request ((provider llm-claude) prompt stream)
(let ((request
`(:model ,(llm-claude-chat-model provider)
:stream ,(if stream t :false)
;; Claude requires max_tokens
:max_tokens ,(or (llm-chat-prompt-max-tokens prompt) 4096)
:messages
,(vconcat
(mapcar (lambda (interaction)
`(:role ,(pcase (llm-chat-prompt-interaction-role interaction)
('tool_results "user")
('tool_use "assistant")
('assistant "assistant")
('user "user"))
:content
,(cond ((llm-chat-prompt-interaction-tool-results interaction)
(vconcat (mapcar (lambda (result)
`(:type "tool_result"
:tool_use_id
,(llm-chat-prompt-tool-result-call-id result)
:content
,(llm-chat-prompt-tool-result-result result)))
(llm-chat-prompt-interaction-tool-results interaction))))
((llm-multipart-p (llm-chat-prompt-interaction-content interaction))
(llm-claude--multipart-content
(llm-chat-prompt-interaction-content interaction)))
(t
(llm-chat-prompt-interaction-content interaction)))))
(llm-chat-prompt-interactions prompt)))))
(system (llm-provider-utils-get-system-prompt prompt)))
(when (llm-chat-prompt-tools prompt)
(plist-put request :tools
(vconcat (mapcar (lambda (f) (llm-claude--tool-call f))
(llm-chat-prompt-tools prompt)))))
(when (> (length system) 0)
(plist-put request :system system))
(when (llm-chat-prompt-temperature prompt)
(plist-put request :temperature (llm-chat-prompt-temperature prompt)))
(append request (llm-provider-utils-non-standard-params-plist prompt))))
(defun llm-claude--multipart-content (content)
"Return CONTENT as a list of Claude multipart content."
(vconcat (mapcar (lambda (part)
(cond ((stringp part)
`(:type "text"
:text ,part))
((llm-media-p part)
`(:type "image"
:source (:type "base64"
:media_type ,(llm-media-mime-type part)
:data ,(base64-encode-string (llm-media-data part) t))))
(t
(error "Unsupported multipart content: %s" part))))
(llm-multipart-parts content))))
(cl-defmethod llm-provider-extract-tool-uses ((_ llm-claude) response)
(let ((content (append (assoc-default 'content response) nil)))
(cl-loop for item in content
when (equal "tool_use" (assoc-default 'type item))
collect (make-llm-provider-utils-tool-use
:id (assoc-default 'id item)
:name (assoc-default 'name item)
:args (assoc-default 'input item)))))
(cl-defmethod llm-provider-populate-tool-uses ((_ llm-claude) prompt tool-uses)
(llm-provider-utils-append-to-prompt
prompt
(vconcat (mapcar (lambda (call)
`(:type "tool_use"
:id ,(llm-provider-utils-tool-use-id call)
:name ,(llm-provider-utils-tool-use-name call)
:input ,(llm-provider-utils-tool-use-args call)))
tool-uses))))
(cl-defmethod llm-provider-chat-extract-result ((_ llm-claude) response)
(let ((content (aref (assoc-default 'content response) 0)))
(if (equal (assoc-default 'type content) "text")
(assoc-default 'text content)
(format "Unsupported non-text response: %s" content))))
(cl-defmethod llm-provider-streaming-media-handler ((_ llm-claude)
msg-receiver _ err-receiver)
(cons 'text/event-stream
(plz-event-source:text/event-stream
:events `((message_start . ignore)
(content_block_start . ignore)
(ping . ignore)
(message_stop . ignore)
(content_block_stop . ignore)
(error . ,(lambda (event)
(funcall err-receiver (plz-event-source-event-data event))))
(content_block_delta
.
,(lambda (event)
(let* ((data (plz-event-source-event-data event))
(json (json-parse-string data :object-type 'alist))
(delta (assoc-default 'delta json))
(type (assoc-default 'type delta)))
(when (equal type "text_delta")
(funcall msg-receiver (assoc-default 'text delta))))))))))
(cl-defmethod llm-provider-collect-streaming-tool-uses ((_ llm-claude) data)
(llm-provider-utils-openai-collect-streaming-tool-uses data))
(cl-defmethod llm-provider-headers ((provider llm-claude))
`(("x-api-key" . ,(if (functionp (llm-claude-key provider))
(funcall (llm-claude-key provider))
(llm-claude-key provider)))
("anthropic-version" . "2023-06-01")
("anthropic-beta" . "tools-2024-04-04")))
(cl-defmethod llm-provider-chat-extract-error ((_ llm-claude) response)
(when-let ((err (assoc-default 'error response)))
(format "Error %s: '%s'" (assoc-default 'type err)
(assoc-default 'message err))))
(cl-defmethod llm-provider-chat-url ((_ llm-claude))
"Return the URL for the Claude API."
"https://api.anthropic.com/v1/messages")
(cl-defmethod llm-chat-token-limit ((provider llm-claude))
(llm-provider-utils-model-token-limit (llm-claude-chat-model provider)))
(cl-defmethod llm-name ((_ llm-claude))
"Return the name of the provider."
"Claude")
(cl-defmethod llm-capabilities ((_ llm-claude))
(list 'streaming 'function-calls 'image-input))
(cl-defmethod llm-provider-append-to-prompt ((_ llm-claude) prompt result
&optional tool-use-results)
;; Claude doesn't have a 'function role, so we just always use assistant here.
;; But if it's a function result, it considers that a 'user response, which
;; needs to be sent back.
(llm-provider-utils-append-to-prompt prompt result tool-use-results (if tool-use-results
'user
'assistant)))
(provide 'llm-claude)
;;; llm-claude.el ends here