1use crate::{
2 DebugEvent, EditPredictionFinishedDebugEvent, EditPredictionId, EditPredictionModelInput,
3 EditPredictionStartedDebugEvent, open_ai_response::text_from_response,
4 prediction::EditPredictionResult, zeta1::compute_edits,
5};
6use anyhow::{Context as _, Result};
7use edit_prediction_types::EditPredictionDismissReason;
8use futures::AsyncReadExt as _;
9use gpui::{
10 App, AppContext as _, Entity, Global, SharedString, Task,
11 http_client::{self, AsyncBody, HttpClient, Method},
12};
13use language::{OffsetRangeExt as _, ToOffset, ToPoint as _};
14use language_model::{ApiKeyState, EnvVar, env_var};
15use release_channel::AppVersion;
16use serde::Serialize;
17use std::{mem, ops::Range, path::Path, sync::Arc, time::Instant};
18
19use zeta_prompt::ZetaPromptInput;
20
21const MERCURY_API_URL: &str = "https://api.inceptionlabs.ai/v1/edit/completions";
22const MAX_REWRITE_TOKENS: usize = 150;
23const MAX_CONTEXT_TOKENS: usize = 350;
24
25pub struct Mercury {
26 pub api_token: Entity<ApiKeyState>,
27}
28
29impl Mercury {
30 pub fn new(cx: &mut App) -> Self {
31 Mercury {
32 api_token: mercury_api_token(cx),
33 }
34 }
35
36 pub(crate) fn request_prediction(
37 &self,
38 EditPredictionModelInput {
39 buffer,
40 snapshot,
41 position,
42 events,
43 related_files,
44 debug_tx,
45 ..
46 }: EditPredictionModelInput,
47 cx: &mut App,
48 ) -> Task<Result<Option<EditPredictionResult>>> {
49 self.api_token.update(cx, |key_state, cx| {
50 _ = key_state.load_if_needed(MERCURY_CREDENTIALS_URL, |s| s, cx);
51 });
52 let Some(api_token) = self.api_token.read(cx).key(&MERCURY_CREDENTIALS_URL) else {
53 return Task::ready(Ok(None));
54 };
55 let full_path: Arc<Path> = snapshot
56 .file()
57 .map(|file| file.full_path(cx))
58 .unwrap_or_else(|| "untitled".into())
59 .into();
60
61 let http_client = cx.http_client();
62 let cursor_point = position.to_point(&snapshot);
63 let buffer_snapshotted_at = Instant::now();
64 let active_buffer = buffer.clone();
65
66 let result = cx.background_spawn(async move {
67 let (editable_range, context_range) =
68 crate::cursor_excerpt::editable_and_context_ranges_for_cursor_position(
69 cursor_point,
70 &snapshot,
71 MAX_CONTEXT_TOKENS,
72 MAX_REWRITE_TOKENS,
73 );
74
75 let related_files = crate::filter_redundant_excerpts(
76 related_files,
77 full_path.as_ref(),
78 context_range.start.row..context_range.end.row,
79 );
80
81 let context_offset_range = context_range.to_offset(&snapshot);
82 let context_start_row = context_range.start.row;
83
84 let editable_offset_range = editable_range.to_offset(&snapshot);
85
86 let inputs = zeta_prompt::ZetaPromptInput {
87 events,
88 related_files,
89 cursor_offset_in_excerpt: cursor_point.to_offset(&snapshot)
90 - context_offset_range.start,
91 cursor_path: full_path.clone(),
92 cursor_excerpt: snapshot
93 .text_for_range(context_range)
94 .collect::<String>()
95 .into(),
96 editable_range_in_excerpt: (editable_offset_range.start
97 - context_offset_range.start)
98 ..(editable_offset_range.end - context_offset_range.start),
99 excerpt_start_row: Some(context_start_row),
100 };
101
102 let prompt = build_prompt(&inputs);
103
104 if let Some(debug_tx) = &debug_tx {
105 debug_tx
106 .unbounded_send(DebugEvent::EditPredictionStarted(
107 EditPredictionStartedDebugEvent {
108 buffer: active_buffer.downgrade(),
109 prompt: Some(prompt.clone()),
110 position,
111 },
112 ))
113 .ok();
114 }
115
116 let request_body = open_ai::Request {
117 model: "mercury-coder".into(),
118 messages: vec![open_ai::RequestMessage::User {
119 content: open_ai::MessageContent::Plain(prompt),
120 }],
121 stream: false,
122 max_completion_tokens: None,
123 stop: vec![],
124 temperature: None,
125 tool_choice: None,
126 parallel_tool_calls: None,
127 tools: vec![],
128 prompt_cache_key: None,
129 reasoning_effort: None,
130 };
131
132 let buf = serde_json::to_vec(&request_body)?;
133 let body: AsyncBody = buf.into();
134
135 let request = http_client::Request::builder()
136 .uri(MERCURY_API_URL)
137 .header("Content-Type", "application/json")
138 .header("Authorization", format!("Bearer {}", api_token))
139 .header("Connection", "keep-alive")
140 .method(Method::POST)
141 .body(body)
142 .context("Failed to create request")?;
143
144 let mut response = http_client
145 .send(request)
146 .await
147 .context("Failed to send request")?;
148
149 let mut body: Vec<u8> = Vec::new();
150 response
151 .body_mut()
152 .read_to_end(&mut body)
153 .await
154 .context("Failed to read response body")?;
155
156 let response_received_at = Instant::now();
157 if !response.status().is_success() {
158 anyhow::bail!(
159 "Request failed with status: {:?}\nBody: {}",
160 response.status(),
161 String::from_utf8_lossy(&body),
162 );
163 };
164
165 let mut response: open_ai::Response =
166 serde_json::from_slice(&body).context("Failed to parse response")?;
167
168 let id = mem::take(&mut response.id);
169 let response_str = text_from_response(response).unwrap_or_default();
170
171 if let Some(debug_tx) = &debug_tx {
172 debug_tx
173 .unbounded_send(DebugEvent::EditPredictionFinished(
174 EditPredictionFinishedDebugEvent {
175 buffer: active_buffer.downgrade(),
176 model_output: Some(response_str.clone()),
177 position,
178 },
179 ))
180 .ok();
181 }
182
183 let response_str = response_str.strip_prefix("```\n").unwrap_or(&response_str);
184 let response_str = response_str.strip_suffix("\n```").unwrap_or(&response_str);
185
186 let mut edits = Vec::new();
187 const NO_PREDICTION_OUTPUT: &str = "None";
188
189 if response_str != NO_PREDICTION_OUTPUT {
190 let old_text = snapshot
191 .text_for_range(editable_offset_range.clone())
192 .collect::<String>();
193 edits = compute_edits(
194 old_text,
195 &response_str,
196 editable_offset_range.start,
197 &snapshot,
198 );
199 }
200
201 anyhow::Ok((id, edits, snapshot, response_received_at, inputs))
202 });
203
204 cx.spawn(async move |cx| {
205 let (id, edits, old_snapshot, response_received_at, inputs) =
206 result.await.context("Mercury edit prediction failed")?;
207 anyhow::Ok(Some(
208 EditPredictionResult::new(
209 EditPredictionId(id.into()),
210 &buffer,
211 &old_snapshot,
212 edits.into(),
213 None,
214 buffer_snapshotted_at,
215 response_received_at,
216 inputs,
217 cx,
218 )
219 .await,
220 ))
221 })
222 }
223}
224
225fn build_prompt(inputs: &ZetaPromptInput) -> String {
226 const RECENTLY_VIEWED_SNIPPETS_START: &str = "<|recently_viewed_code_snippets|>\n";
227 const RECENTLY_VIEWED_SNIPPETS_END: &str = "<|/recently_viewed_code_snippets|>\n";
228 const RECENTLY_VIEWED_SNIPPET_START: &str = "<|recently_viewed_code_snippet|>\n";
229 const RECENTLY_VIEWED_SNIPPET_END: &str = "<|/recently_viewed_code_snippet|>\n";
230 const CURRENT_FILE_CONTENT_START: &str = "<|current_file_content|>\n";
231 const CURRENT_FILE_CONTENT_END: &str = "<|/current_file_content|>\n";
232 const CODE_TO_EDIT_START: &str = "<|code_to_edit|>\n";
233 const CODE_TO_EDIT_END: &str = "<|/code_to_edit|>\n";
234 const EDIT_DIFF_HISTORY_START: &str = "<|edit_diff_history|>\n";
235 const EDIT_DIFF_HISTORY_END: &str = "<|/edit_diff_history|>\n";
236 const CURSOR_TAG: &str = "<|cursor|>";
237 const CODE_SNIPPET_FILE_PATH_PREFIX: &str = "code_snippet_file_path: ";
238 const CURRENT_FILE_PATH_PREFIX: &str = "current_file_path: ";
239
240 let mut prompt = String::new();
241
242 push_delimited(
243 &mut prompt,
244 RECENTLY_VIEWED_SNIPPETS_START..RECENTLY_VIEWED_SNIPPETS_END,
245 |prompt| {
246 for related_file in inputs.related_files.iter() {
247 for related_excerpt in &related_file.excerpts {
248 push_delimited(
249 prompt,
250 RECENTLY_VIEWED_SNIPPET_START..RECENTLY_VIEWED_SNIPPET_END,
251 |prompt| {
252 prompt.push_str(CODE_SNIPPET_FILE_PATH_PREFIX);
253 prompt.push_str(related_file.path.to_string_lossy().as_ref());
254 prompt.push('\n');
255 prompt.push_str(related_excerpt.text.as_ref());
256 },
257 );
258 }
259 }
260 },
261 );
262
263 push_delimited(
264 &mut prompt,
265 CURRENT_FILE_CONTENT_START..CURRENT_FILE_CONTENT_END,
266 |prompt| {
267 prompt.push_str(CURRENT_FILE_PATH_PREFIX);
268 prompt.push_str(inputs.cursor_path.as_os_str().to_string_lossy().as_ref());
269 prompt.push('\n');
270
271 prompt.push_str(&inputs.cursor_excerpt[0..inputs.editable_range_in_excerpt.start]);
272 push_delimited(prompt, CODE_TO_EDIT_START..CODE_TO_EDIT_END, |prompt| {
273 prompt.push_str(
274 &inputs.cursor_excerpt
275 [inputs.editable_range_in_excerpt.start..inputs.cursor_offset_in_excerpt],
276 );
277 prompt.push_str(CURSOR_TAG);
278 prompt.push_str(
279 &inputs.cursor_excerpt
280 [inputs.cursor_offset_in_excerpt..inputs.editable_range_in_excerpt.end],
281 );
282 });
283 prompt.push_str(&inputs.cursor_excerpt[inputs.editable_range_in_excerpt.end..]);
284 },
285 );
286
287 push_delimited(
288 &mut prompt,
289 EDIT_DIFF_HISTORY_START..EDIT_DIFF_HISTORY_END,
290 |prompt| {
291 for event in inputs.events.iter() {
292 zeta_prompt::write_event(prompt, &event);
293 }
294 },
295 );
296
297 prompt
298}
299
300fn push_delimited(prompt: &mut String, delimiters: Range<&str>, cb: impl FnOnce(&mut String)) {
301 prompt.push_str(delimiters.start);
302 cb(prompt);
303 prompt.push('\n');
304 prompt.push_str(delimiters.end);
305}
306
307pub const MERCURY_CREDENTIALS_URL: SharedString =
308 SharedString::new_static("https://api.inceptionlabs.ai/v1/edit/completions");
309pub const MERCURY_CREDENTIALS_USERNAME: &str = "mercury-api-token";
310pub static MERCURY_TOKEN_ENV_VAR: std::sync::LazyLock<EnvVar> = env_var!("MERCURY_AI_TOKEN");
311
312struct GlobalMercuryApiKey(Entity<ApiKeyState>);
313
314impl Global for GlobalMercuryApiKey {}
315
316pub fn mercury_api_token(cx: &mut App) -> Entity<ApiKeyState> {
317 if let Some(global) = cx.try_global::<GlobalMercuryApiKey>() {
318 return global.0.clone();
319 }
320 let entity =
321 cx.new(|_| ApiKeyState::new(MERCURY_CREDENTIALS_URL, MERCURY_TOKEN_ENV_VAR.clone()));
322 cx.set_global(GlobalMercuryApiKey(entity.clone()));
323 entity
324}
325
326pub fn load_mercury_api_token(cx: &mut App) -> Task<Result<(), language_model::AuthenticateError>> {
327 mercury_api_token(cx).update(cx, |key_state, cx| {
328 key_state.load_if_needed(MERCURY_CREDENTIALS_URL, |s| s, cx)
329 })
330}
331
332const FEEDBACK_API_URL: &str = "https://api-feedback.inceptionlabs.ai/feedback";
333
334#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize)]
335#[serde(rename_all = "snake_case")]
336enum MercuryUserAction {
337 Accept,
338 Reject,
339 Ignore,
340}
341
342#[derive(Serialize)]
343struct FeedbackRequest {
344 request_id: SharedString,
345 provider_name: &'static str,
346 user_action: MercuryUserAction,
347 provider_version: String,
348}
349
350pub(crate) fn edit_prediction_accepted(
351 prediction_id: EditPredictionId,
352 http_client: Arc<dyn HttpClient>,
353 cx: &App,
354) {
355 send_feedback(prediction_id, MercuryUserAction::Accept, http_client, cx);
356}
357
358pub(crate) fn edit_prediction_rejected(
359 prediction_id: EditPredictionId,
360 was_shown: bool,
361 dismiss_reason: EditPredictionDismissReason,
362 http_client: Arc<dyn HttpClient>,
363 cx: &App,
364) {
365 if !was_shown {
366 return;
367 }
368 let action = match dismiss_reason {
369 EditPredictionDismissReason::Rejected => MercuryUserAction::Reject,
370 EditPredictionDismissReason::Ignored => MercuryUserAction::Ignore,
371 };
372 send_feedback(prediction_id, action, http_client, cx);
373}
374
375fn send_feedback(
376 prediction_id: EditPredictionId,
377 action: MercuryUserAction,
378 http_client: Arc<dyn HttpClient>,
379 cx: &App,
380) {
381 let request_id = prediction_id.0;
382 let app_version = AppVersion::global(cx);
383 cx.background_spawn(async move {
384 let body = FeedbackRequest {
385 request_id,
386 provider_name: "zed",
387 user_action: action,
388 provider_version: app_version.to_string(),
389 };
390
391 let request = http_client::Request::builder()
392 .uri(FEEDBACK_API_URL)
393 .method(Method::POST)
394 .header("Content-Type", "application/json")
395 .body(AsyncBody::from(serde_json::to_vec(&body)?))?;
396
397 let response = http_client.send(request).await?;
398 if !response.status().is_success() {
399 anyhow::bail!("Feedback API returned status: {}", response.status());
400 }
401
402 log::debug!(
403 "Mercury feedback sent: request_id={}, action={:?}",
404 body.request_id,
405 body.user_action
406 );
407
408 anyhow::Ok(())
409 })
410 .detach_and_log_err(cx);
411}