Add copy meta-command

README.md

@@ -116,6 +116,7 @@ The following meta commands have special behaviors to manipulate the context or
 - `:branch <branch>`: Create a new branch in the conversation.
 - `:clear`: Clear all messages in the conversation.
 - `:continue`: Re-prompt the model without a user message.
+- `:copy`: Copy the last agent response to clipboard.
 - `:cost`: Show token counts of calls to remote LLM APIs in this conversation.
 - `:dump`: Dump all context file contents to disk.
 - `:exit`: Exit the conversation.

src/chat/commands.ts

@@ -4,6 +4,7 @@ import { CommandDescription } from './command'
 import { branchCommand } from './commands/branch'
 import { clearCommand } from './commands/clear'
 import { continueCommand } from './commands/continue'
+import { copyCommand } from './commands/copy'
 import { costCommand } from './commands/cost'
 import { dumpCommand } from './commands/dump'
 import { exitCommand } from './commands/exit'
@@ -34,6 +35,7 @@ export const commands: CommandDescription[] = [
     branchCommand,
     clearCommand,
     continueCommand,
+    copyCommand,
     costCommand,
     dumpCommand,
     exitCommand,

src/chat/commands/copy.ts

@@ -0,0 +1,41 @@
+import chalk from 'chalk'
+import * as ncp from 'copy-paste'
+import { CommandDescription } from '../command'
+import { ChatContext } from '../context'
+
+export const copyCommand: CommandDescription = {
+    prefix: ':copy',
+    description: 'Copy the last agent response to clipboard.',
+    handler: handleCopy,
+}
+
+async function handleCopy(context: ChatContext, args: string) {
+    if (args.trim() !== '') {
+        console.log(chalk.red.bold('Unexpected arguments supplied to :copy.'))
+        console.log()
+        return
+    }
+
+    const messages = context.provider.conversationManager.visibleMessages()
+    const lastUserMessageIndex = messages.findLastIndex(message => message.role === 'user')
+    const agentMessages = lastUserMessageIndex === -1 ? [] : messages.slice(lastUserMessageIndex + 1)
+
+    if (agentMessages.length === 0) {
+        console.log('Nothing to copy.')
+        console.log()
+        return
+    }
+
+    await new Promise<void>((resolve, reject) => {
+        ncp.copy(JSON.stringify(agentMessages, null, 2), err => {
+            if (err) {
+                reject(err)
+            } else {
+                resolve()
+            }
+        })
+    })
+
+    console.log('Last agent response copied to clipboard\n')
+    console.log()
+}