1use crate::{
2 DebugEvent, EditPredictionFinishedDebugEvent, EditPredictionId, EditPredictionModelInput,
3 EditPredictionStartedDebugEvent, EditPredictionStore, open_ai_response::text_from_response,
4 prediction::EditPredictionResult, zeta::compute_edits,
5};
6use anyhow::{Context as _, Result};
7use cloud_llm_client::EditPredictionRejectReason;
8use credentials_provider::CredentialsProvider;
9use futures::AsyncReadExt as _;
10use gpui::{
11 App, AppContext as _, Context, Entity, Global, SharedString, Task,
12 http_client::{self, AsyncBody, HttpClient, Method, StatusCode},
13};
14use language::{ToOffset, ToPoint as _};
15use language_model::{ApiKeyState, EnvVar, env_var};
16use release_channel::AppVersion;
17use serde::{Deserialize, Serialize};
18use std::{mem, ops::Range, path::Path, sync::Arc};
19use zeta_prompt::ZetaPromptInput;
20
21const MERCURY_API_URL: &str = "https://api.inceptionlabs.ai/v1/edit/completions";
22
23pub struct Mercury {
24 pub api_token: Entity<ApiKeyState>,
25 payment_required_error: bool,
26}
27
28impl Mercury {
29 pub fn new(cx: &mut App) -> Self {
30 Mercury {
31 api_token: mercury_api_token(cx),
32 payment_required_error: false,
33 }
34 }
35
36 pub fn has_payment_required_error(&self) -> bool {
37 self.payment_required_error
38 }
39
40 pub fn set_payment_required_error(&mut self, payment_required_error: bool) {
41 self.payment_required_error = payment_required_error;
42 }
43
44 pub(crate) fn request_prediction(
45 &mut self,
46 EditPredictionModelInput {
47 buffer,
48 snapshot,
49 position,
50 events,
51 related_files,
52 debug_tx,
53 ..
54 }: EditPredictionModelInput,
55 credentials_provider: Arc<dyn CredentialsProvider>,
56 cx: &mut Context<EditPredictionStore>,
57 ) -> Task<Result<Option<EditPredictionResult>>> {
58 self.api_token.update(cx, |key_state, cx| {
59 _ = key_state.load_if_needed(MERCURY_CREDENTIALS_URL, |s| s, credentials_provider, cx);
60 });
61 let Some(api_token) = self.api_token.read(cx).key(&MERCURY_CREDENTIALS_URL) else {
62 return Task::ready(Ok(None));
63 };
64 let full_path: Arc<Path> = snapshot
65 .file()
66 .map(|file| file.full_path(cx))
67 .unwrap_or_else(|| "untitled".into())
68 .into();
69
70 let http_client = cx.http_client();
71 let cursor_point = position.to_point(&snapshot);
72 let request_start = cx.background_executor().now();
73 let active_buffer = buffer.clone();
74
75 let result = cx.background_spawn(async move {
76 let cursor_offset = cursor_point.to_offset(&snapshot);
77 let (excerpt_point_range, excerpt_offset_range, cursor_offset_in_excerpt) =
78 crate::cursor_excerpt::compute_cursor_excerpt(&snapshot, cursor_offset);
79
80 let related_files = zeta_prompt::filter_redundant_excerpts(
81 related_files,
82 full_path.as_ref(),
83 excerpt_point_range.start.row..excerpt_point_range.end.row,
84 );
85
86 let cursor_excerpt: Arc<str> = snapshot
87 .text_for_range(excerpt_point_range.clone())
88 .collect::<String>()
89 .into();
90 let syntax_ranges = crate::cursor_excerpt::compute_syntax_ranges(
91 &snapshot,
92 cursor_offset,
93 &excerpt_offset_range,
94 );
95 let excerpt_ranges = zeta_prompt::compute_legacy_excerpt_ranges(
96 &cursor_excerpt,
97 cursor_offset_in_excerpt,
98 &syntax_ranges,
99 );
100
101 let editable_offset_range = (excerpt_offset_range.start
102 + excerpt_ranges.editable_350.start)
103 ..(excerpt_offset_range.start + excerpt_ranges.editable_350.end);
104
105 let inputs = zeta_prompt::ZetaPromptInput {
106 events,
107 related_files: Some(related_files),
108 cursor_offset_in_excerpt: cursor_point.to_offset(&snapshot)
109 - excerpt_offset_range.start,
110 cursor_path: full_path.clone(),
111 cursor_excerpt,
112 excerpt_start_row: Some(excerpt_point_range.start.row),
113 excerpt_ranges,
114 syntax_ranges: Some(syntax_ranges),
115 active_buffer_diagnostics: vec![],
116 in_open_source_repo: false,
117 can_collect_data: false,
118 repo_url: None,
119 };
120
121 let prompt = build_prompt(&inputs);
122
123 if let Some(debug_tx) = &debug_tx {
124 debug_tx
125 .unbounded_send(DebugEvent::EditPredictionStarted(
126 EditPredictionStartedDebugEvent {
127 buffer: active_buffer.downgrade(),
128 prompt: Some(prompt.clone()),
129 position,
130 },
131 ))
132 .ok();
133 }
134
135 let request_body = open_ai::Request {
136 model: "mercury-coder".into(),
137 messages: vec![open_ai::RequestMessage::User {
138 content: open_ai::MessageContent::Plain(prompt),
139 }],
140 stream: false,
141 stream_options: None,
142 max_completion_tokens: None,
143 stop: vec![],
144 temperature: None,
145 tool_choice: None,
146 parallel_tool_calls: None,
147 tools: vec![],
148 prompt_cache_key: None,
149 reasoning_effort: None,
150 };
151
152 let buf = serde_json::to_vec(&request_body)?;
153 let body: AsyncBody = buf.into();
154
155 let request = http_client::Request::builder()
156 .uri(MERCURY_API_URL)
157 .header("Content-Type", "application/json")
158 .header("Authorization", format!("Bearer {}", api_token))
159 .header("Connection", "keep-alive")
160 .method(Method::POST)
161 .body(body)
162 .context("Failed to create request")?;
163
164 let mut response = http_client
165 .send(request)
166 .await
167 .context("Failed to send request")?;
168
169 let mut body: Vec<u8> = Vec::new();
170 response
171 .body_mut()
172 .read_to_end(&mut body)
173 .await
174 .context("Failed to read response body")?;
175
176 if !response.status().is_success() {
177 if response.status() == StatusCode::PAYMENT_REQUIRED {
178 anyhow::bail!(MercuryPaymentRequiredError(
179 mercury_payment_required_message(&body),
180 ));
181 }
182
183 anyhow::bail!(
184 "Request failed with status: {:?}\nBody: {}",
185 response.status(),
186 String::from_utf8_lossy(&body),
187 );
188 };
189
190 let mut response: open_ai::Response =
191 serde_json::from_slice(&body).context("Failed to parse response")?;
192
193 let id = mem::take(&mut response.id);
194 let response_str = text_from_response(response).unwrap_or_default();
195
196 if let Some(debug_tx) = &debug_tx {
197 debug_tx
198 .unbounded_send(DebugEvent::EditPredictionFinished(
199 EditPredictionFinishedDebugEvent {
200 buffer: active_buffer.downgrade(),
201 model_output: Some(response_str.clone()),
202 position,
203 },
204 ))
205 .ok();
206 }
207
208 let response_str = response_str.strip_prefix("```\n").unwrap_or(&response_str);
209 let response_str = response_str.strip_suffix("\n```").unwrap_or(&response_str);
210
211 let mut edits = Vec::new();
212 const NO_PREDICTION_OUTPUT: &str = "None";
213
214 if response_str != NO_PREDICTION_OUTPUT {
215 let old_text = snapshot
216 .text_for_range(editable_offset_range.clone())
217 .collect::<String>();
218 edits = compute_edits(
219 old_text,
220 &response_str,
221 editable_offset_range.start,
222 &snapshot,
223 );
224 }
225
226 anyhow::Ok((id, edits, snapshot, inputs))
227 });
228
229 cx.spawn(async move |ep_store, cx| {
230 let result = result.await.context("Mercury edit prediction failed");
231
232 let has_payment_required_error = result
233 .as_ref()
234 .err()
235 .is_some_and(is_mercury_payment_required_error);
236
237 ep_store.update(cx, |store, cx| {
238 store
239 .mercury
240 .set_payment_required_error(has_payment_required_error);
241 cx.notify();
242 })?;
243
244 let (id, edits, old_snapshot, inputs) = result?;
245 anyhow::Ok(Some(
246 EditPredictionResult::new(
247 EditPredictionId(id.into()),
248 &buffer,
249 &old_snapshot,
250 edits.into(),
251 None,
252 inputs,
253 None,
254 cx.background_executor().now() - request_start,
255 cx,
256 )
257 .await,
258 ))
259 })
260 }
261}
262
263fn build_prompt(inputs: &ZetaPromptInput) -> String {
264 const RECENTLY_VIEWED_SNIPPETS_START: &str = "<|recently_viewed_code_snippets|>\n";
265 const RECENTLY_VIEWED_SNIPPETS_END: &str = "<|/recently_viewed_code_snippets|>\n";
266 const RECENTLY_VIEWED_SNIPPET_START: &str = "<|recently_viewed_code_snippet|>\n";
267 const RECENTLY_VIEWED_SNIPPET_END: &str = "<|/recently_viewed_code_snippet|>\n";
268 const CURRENT_FILE_CONTENT_START: &str = "<|current_file_content|>\n";
269 const CURRENT_FILE_CONTENT_END: &str = "<|/current_file_content|>\n";
270 const CODE_TO_EDIT_START: &str = "<|code_to_edit|>\n";
271 const CODE_TO_EDIT_END: &str = "<|/code_to_edit|>\n";
272 const EDIT_DIFF_HISTORY_START: &str = "<|edit_diff_history|>\n";
273 const EDIT_DIFF_HISTORY_END: &str = "<|/edit_diff_history|>\n";
274 const CURSOR_TAG: &str = "<|cursor|>";
275 const CODE_SNIPPET_FILE_PATH_PREFIX: &str = "code_snippet_file_path: ";
276 const CURRENT_FILE_PATH_PREFIX: &str = "current_file_path: ";
277
278 let mut prompt = String::new();
279
280 push_delimited(
281 &mut prompt,
282 RECENTLY_VIEWED_SNIPPETS_START..RECENTLY_VIEWED_SNIPPETS_END,
283 |prompt| {
284 for related_file in inputs.related_files.as_deref().unwrap_or_default().iter() {
285 for related_excerpt in &related_file.excerpts {
286 push_delimited(
287 prompt,
288 RECENTLY_VIEWED_SNIPPET_START..RECENTLY_VIEWED_SNIPPET_END,
289 |prompt| {
290 prompt.push_str(CODE_SNIPPET_FILE_PATH_PREFIX);
291 prompt.push_str(related_file.path.to_string_lossy().as_ref());
292 prompt.push('\n');
293 prompt.push_str(related_excerpt.text.as_ref());
294 },
295 );
296 }
297 }
298 },
299 );
300
301 push_delimited(
302 &mut prompt,
303 CURRENT_FILE_CONTENT_START..CURRENT_FILE_CONTENT_END,
304 |prompt| {
305 prompt.push_str(CURRENT_FILE_PATH_PREFIX);
306 prompt.push_str(inputs.cursor_path.as_os_str().to_string_lossy().as_ref());
307 prompt.push('\n');
308
309 let editable_range = &inputs.excerpt_ranges.editable_350;
310 prompt.push_str(&inputs.cursor_excerpt[0..editable_range.start]);
311 push_delimited(prompt, CODE_TO_EDIT_START..CODE_TO_EDIT_END, |prompt| {
312 prompt.push_str(
313 &inputs.cursor_excerpt[editable_range.start..inputs.cursor_offset_in_excerpt],
314 );
315 prompt.push_str(CURSOR_TAG);
316 prompt.push_str(
317 &inputs.cursor_excerpt[inputs.cursor_offset_in_excerpt..editable_range.end],
318 );
319 });
320 prompt.push_str(&inputs.cursor_excerpt[editable_range.end..]);
321 },
322 );
323
324 push_delimited(
325 &mut prompt,
326 EDIT_DIFF_HISTORY_START..EDIT_DIFF_HISTORY_END,
327 |prompt| {
328 for event in inputs.events.iter() {
329 zeta_prompt::write_event(prompt, &event);
330 }
331 },
332 );
333
334 prompt
335}
336
337fn push_delimited(prompt: &mut String, delimiters: Range<&str>, cb: impl FnOnce(&mut String)) {
338 prompt.push_str(delimiters.start);
339 cb(prompt);
340 prompt.push('\n');
341 prompt.push_str(delimiters.end);
342}
343
344pub const MERCURY_CREDENTIALS_URL: SharedString =
345 SharedString::new_static("https://api.inceptionlabs.ai/v1/edit/completions");
346pub const MERCURY_CREDENTIALS_USERNAME: &str = "mercury-api-token";
347
348#[derive(Debug, thiserror::Error)]
349#[error("{0}")]
350struct MercuryPaymentRequiredError(SharedString);
351
352#[derive(Deserialize)]
353struct MercuryErrorResponse {
354 error: MercuryErrorMessage,
355}
356
357#[derive(Deserialize)]
358struct MercuryErrorMessage {
359 message: String,
360}
361
362fn is_mercury_payment_required_error(error: &anyhow::Error) -> bool {
363 error
364 .downcast_ref::<MercuryPaymentRequiredError>()
365 .is_some()
366}
367
368fn mercury_payment_required_message(body: &[u8]) -> SharedString {
369 serde_json::from_slice::<MercuryErrorResponse>(body)
370 .map(|response| response.error.message.into())
371 .unwrap_or_else(|_| String::from_utf8_lossy(body).trim().to_string().into())
372}
373
374pub static MERCURY_TOKEN_ENV_VAR: std::sync::LazyLock<EnvVar> = env_var!("MERCURY_AI_TOKEN");
375
376struct GlobalMercuryApiKey(Entity<ApiKeyState>);
377
378impl Global for GlobalMercuryApiKey {}
379
380pub fn mercury_api_token(cx: &mut App) -> Entity<ApiKeyState> {
381 if let Some(global) = cx.try_global::<GlobalMercuryApiKey>() {
382 return global.0.clone();
383 }
384 let entity =
385 cx.new(|_| ApiKeyState::new(MERCURY_CREDENTIALS_URL, MERCURY_TOKEN_ENV_VAR.clone()));
386 cx.set_global(GlobalMercuryApiKey(entity.clone()));
387 entity
388}
389
390pub fn load_mercury_api_token(cx: &mut App) -> Task<Result<(), language_model::AuthenticateError>> {
391 let credentials_provider = zed_credentials_provider::global(cx);
392 mercury_api_token(cx).update(cx, |key_state, cx| {
393 key_state.load_if_needed(MERCURY_CREDENTIALS_URL, |s| s, credentials_provider, cx)
394 })
395}
396
397const FEEDBACK_API_URL: &str = "https://api-feedback.inceptionlabs.ai/feedback";
398
399#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize)]
400#[serde(rename_all = "snake_case")]
401enum MercuryUserAction {
402 Accept,
403 Reject,
404 Ignore,
405}
406
407#[derive(Serialize)]
408struct FeedbackRequest {
409 request_id: SharedString,
410 provider_name: &'static str,
411 user_action: MercuryUserAction,
412 provider_version: String,
413}
414
415pub(crate) fn edit_prediction_accepted(
416 prediction_id: EditPredictionId,
417 http_client: Arc<dyn HttpClient>,
418 cx: &App,
419) {
420 send_feedback(prediction_id, MercuryUserAction::Accept, http_client, cx);
421}
422
423pub(crate) fn edit_prediction_rejected(
424 prediction_id: EditPredictionId,
425 was_shown: bool,
426 reason: EditPredictionRejectReason,
427 http_client: Arc<dyn HttpClient>,
428 cx: &App,
429) {
430 if !was_shown {
431 return;
432 }
433 let action = match reason {
434 EditPredictionRejectReason::Rejected => MercuryUserAction::Reject,
435 EditPredictionRejectReason::Discarded => MercuryUserAction::Ignore,
436 _ => return,
437 };
438 send_feedback(prediction_id, action, http_client, cx);
439}
440
441fn send_feedback(
442 prediction_id: EditPredictionId,
443 action: MercuryUserAction,
444 http_client: Arc<dyn HttpClient>,
445 cx: &App,
446) {
447 let request_id = prediction_id.0;
448 let app_version = AppVersion::global(cx);
449 cx.background_spawn(async move {
450 let body = FeedbackRequest {
451 request_id,
452 provider_name: "zed",
453 user_action: action,
454 provider_version: app_version.to_string(),
455 };
456
457 let request = http_client::Request::builder()
458 .uri(FEEDBACK_API_URL)
459 .method(Method::POST)
460 .header("Content-Type", "application/json")
461 .body(AsyncBody::from(serde_json::to_vec(&body)?))?;
462
463 let response = http_client.send(request).await?;
464 if !response.status().is_success() {
465 anyhow::bail!("Feedback API returned status: {}", response.status());
466 }
467
468 log::debug!(
469 "Mercury feedback sent: request_id={}, action={:?}",
470 body.request_id,
471 body.user_action
472 );
473
474 anyhow::Ok(())
475 })
476 .detach_and_log_err(cx);
477}