Private/LLMClient.ps1
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function Invoke-PSCopilotLLM { param ([string]$Prompt) $config = Get-PSCopilotConfig try { switch ($config.Provider) { 'OpenAI' { $baseUrl = if ($config.BaseUrl) { $config.BaseUrl.TrimEnd('/') } else { 'https://api.openai.com/v1' } $uri = "$baseUrl/chat/completions" $headers = @{ 'Content-Type' = 'application/json' 'Authorization' = "Bearer $($config.ApiKey)" } $body = @{ model = $config.Model messages = @(@{ role = 'user'; content = $Prompt }) temperature = 0.2 max_tokens = 256 } | ConvertTo-Json -Depth 6 $response = Invoke-RestMethod -Uri $uri -Method POST -Headers $headers -Body $body if ($response -and $response.choices -and $response.choices.Count -gt 0) { return $response.choices[0].message.content } return $null } 'Claude' { $baseUrl = if ($config.BaseUrl) { $config.BaseUrl.TrimEnd('/') } else { 'https://api.anthropic.com/v1' } $uri = "$baseUrl/messages" $headers = @{ 'Content-Type' = 'application/json' 'x-api-key' = $config.ApiKey 'anthropic-version' = $config.AnthropicVersion } $body = @{ model = $config.Model max_tokens = 256 messages = @(@{ role = 'user' content = @(@{ type = 'text'; text = $Prompt }) }) } | ConvertTo-Json -Depth 6 $response = Invoke-RestMethod -Uri $uri -Method POST -Headers $headers -Body $body if ($response -and $response.content -and $response.content.Count -gt 0) { return $response.content[0].text } return $null } default { # AzureOpenAI # {endpoint}/openai/deployments/{deployment}/chat/completions?api-version={apiVersion} $baseEndpoint = $config.Endpoint.TrimEnd('/') $deployment = $config.Deployment $apiVersion = $config.ApiVersion $uri = "$baseEndpoint/openai/deployments/$deployment/chat/completions?api-version=$apiVersion" $headers = @{ 'Content-Type' = 'application/json' 'api-key' = $config.ApiKey } $body = @{ messages = @(@{ role = 'user'; content = $Prompt }) temperature = 0.2 max_tokens = 256 # Azure uses deployment in the path; do not send "model" } | ConvertTo-Json -Depth 6 $response = Invoke-RestMethod -Uri $uri -Method POST -Headers $headers -Body $body if ($response -and $response.choices -and $response.choices.Count -gt 0) { return $response.choices[0].message.content } return $null } } } catch { Write-Error "LLM request failed: $_" } } # Chat-capable variant that preserves context function Invoke-PSCopilotLLMChat { param ( [Parameter(Mandatory=$true)] [object[]]$Messages, [string]$SystemPrompt ) $config = Get-PSCopilotConfig try { switch ($config.Provider) { 'OpenAI' { $baseUrl = if ($config.BaseUrl) { $config.BaseUrl.TrimEnd('/') } else { 'https://api.openai.com/v1' } $uri = "$baseUrl/chat/completions" $headers = @{ 'Content-Type' = 'application/json' 'Authorization' = "Bearer $($config.ApiKey)" } $msgs = @() if ($SystemPrompt) { $msgs += @{ role = 'system'; content = $SystemPrompt } } $msgs += $Messages $body = @{ model = $config.Model messages = $msgs temperature = 0.2 max_tokens = 256 } | ConvertTo-Json -Depth 6 $response = Invoke-RestMethod -Uri $uri -Method POST -Headers $headers -Body $body if ($response -and $response.choices -and $response.choices.Count -gt 0) { return $response.choices[0].message.content } return $null } 'Claude' { $baseUrl = if ($config.BaseUrl) { $config.BaseUrl.TrimEnd('/') } else { 'https://api.anthropic.com/v1' } $uri = "$baseUrl/messages" $headers = @{ 'Content-Type' = 'application/json' 'x-api-key' = $config.ApiKey 'anthropic-version' = $config.AnthropicVersion } $claudeMsgs = @() foreach ($m in $Messages) { $claudeMsgs += @{ role = $m.role; content = @(@{ type = 'text'; text = [string]$m.content }) } } $body = @{ model = $config.Model max_tokens = 256 messages = $claudeMsgs } if ($SystemPrompt) { $body.system = $SystemPrompt } $bodyJson = $body | ConvertTo-Json -Depth 8 $response = Invoke-RestMethod -Uri $uri -Method POST -Headers $headers -Body $bodyJson if ($response -and $response.content -and $response.content.Count -gt 0) { return $response.content[0].text } return $null } default { # AzureOpenAI $baseEndpoint = $config.Endpoint.TrimEnd('/') $deployment = $config.Deployment $apiVersion = $config.ApiVersion $uri = "$baseEndpoint/openai/deployments/$deployment/chat/completions?api-version=$apiVersion" $headers = @{ 'Content-Type' = 'application/json' 'api-key' = $config.ApiKey } $msgs = @() if ($SystemPrompt) { $msgs += @{ role = 'system'; content = $SystemPrompt } } $msgs += $Messages $body = @{ messages = $msgs temperature = 0.2 max_tokens = 256 } | ConvertTo-Json -Depth 6 $response = Invoke-RestMethod -Uri $uri -Method POST -Headers $headers -Body $body if ($response -and $response.choices -and $response.choices.Count -gt 0) { return $response.choices[0].message.content } return $null } } } catch { Write-Error "LLM request failed: $_" } } |