1use std::io::{Cursor, Write};
2use std::sync::Arc;
3
4use anyhow::Result;
5use base64::write::EncoderWriter;
6use cloud_llm_client::{CompletionIntent, CompletionMode};
7use gpui::{
8 App, AppContext as _, DevicePixels, Image, ImageFormat, ObjectFit, SharedString, Size, Task,
9 point, px, size,
10};
11use image::GenericImageView as _;
12use image::codecs::png::PngEncoder;
13use serde::{Deserialize, Serialize};
14use util::ResultExt;
15
16use crate::role::Role;
17use crate::{LanguageModelToolUse, LanguageModelToolUseId};
18
19#[derive(Clone, PartialEq, Eq, Serialize, Deserialize, Hash)]
20pub struct LanguageModelImage {
21 /// A base64-encoded PNG image.
22 pub source: SharedString,
23 #[serde(default, skip_serializing_if = "Option::is_none")]
24 pub size: Option<Size<DevicePixels>>,
25}
26
27impl LanguageModelImage {
28 pub fn len(&self) -> usize {
29 self.source.len()
30 }
31
32 pub fn is_empty(&self) -> bool {
33 self.source.is_empty()
34 }
35
36 // Parse Self from a JSON object with case-insensitive field names
37 pub fn from_json(obj: &serde_json::Map<String, serde_json::Value>) -> Option<Self> {
38 let mut source = None;
39 let mut size_obj = None;
40
41 // Find source and size fields (case-insensitive)
42 for (k, v) in obj.iter() {
43 match k.to_lowercase().as_str() {
44 "source" => source = v.as_str(),
45 "size" => size_obj = v.as_object(),
46 _ => {}
47 }
48 }
49
50 let source = source?;
51 let size_obj = size_obj?;
52
53 let mut width = None;
54 let mut height = None;
55
56 // Find width and height in size object (case-insensitive)
57 for (k, v) in size_obj.iter() {
58 match k.to_lowercase().as_str() {
59 "width" => width = v.as_i64().map(|w| w as i32),
60 "height" => height = v.as_i64().map(|h| h as i32),
61 _ => {}
62 }
63 }
64
65 Some(Self {
66 size: Some(size(DevicePixels(width?), DevicePixels(height?))),
67 source: SharedString::from(source.to_string()),
68 })
69 }
70}
71
72impl std::fmt::Debug for LanguageModelImage {
73 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
74 f.debug_struct("LanguageModelImage")
75 .field("source", &format!("<{} bytes>", self.source.len()))
76 .field("size", &self.size)
77 .finish()
78 }
79}
80
81/// Anthropic wants uploaded images to be smaller than this in both dimensions.
82const ANTHROPIC_SIZE_LIMIT: f32 = 1568.;
83
84/// Default per-image hard limit (in bytes) for the encoded image payload we send upstream.
85///
86/// NOTE: `LanguageModelImage.source` is base64-encoded PNG bytes (without the `data:` prefix).
87/// This limit is enforced on the encoded PNG bytes *before* base64 encoding.
88const DEFAULT_IMAGE_MAX_BYTES: usize = 5 * 1024 * 1024;
89
90/// Conservative cap on how many times we'll attempt to shrink/re-encode an image to fit
91/// `DEFAULT_IMAGE_MAX_BYTES`.
92const MAX_IMAGE_DOWNSCALE_PASSES: usize = 8;
93
94impl LanguageModelImage {
95 pub fn empty() -> Self {
96 Self {
97 source: "".into(),
98 size: None,
99 }
100 }
101
102 pub fn from_image(data: Arc<Image>, cx: &mut App) -> Task<Option<Self>> {
103 cx.background_spawn(async move {
104 let image_bytes = Cursor::new(data.bytes());
105 let dynamic_image = match data.format() {
106 ImageFormat::Png => image::codecs::png::PngDecoder::new(image_bytes)
107 .and_then(image::DynamicImage::from_decoder),
108 ImageFormat::Jpeg => image::codecs::jpeg::JpegDecoder::new(image_bytes)
109 .and_then(image::DynamicImage::from_decoder),
110 ImageFormat::Webp => image::codecs::webp::WebPDecoder::new(image_bytes)
111 .and_then(image::DynamicImage::from_decoder),
112 ImageFormat::Gif => image::codecs::gif::GifDecoder::new(image_bytes)
113 .and_then(image::DynamicImage::from_decoder),
114 ImageFormat::Bmp => image::codecs::bmp::BmpDecoder::new(image_bytes)
115 .and_then(image::DynamicImage::from_decoder),
116 ImageFormat::Tiff => image::codecs::tiff::TiffDecoder::new(image_bytes)
117 .and_then(image::DynamicImage::from_decoder),
118 _ => return None,
119 }
120 .log_err()?;
121
122 let width = dynamic_image.width();
123 let height = dynamic_image.height();
124 let image_size = size(DevicePixels(width as i32), DevicePixels(height as i32));
125
126 // First apply any provider-specific dimension constraints we know about (Anthropic).
127 let mut processed_image = if image_size.width.0 > ANTHROPIC_SIZE_LIMIT as i32
128 || image_size.height.0 > ANTHROPIC_SIZE_LIMIT as i32
129 {
130 let new_bounds = ObjectFit::ScaleDown.get_bounds(
131 gpui::Bounds {
132 origin: point(px(0.0), px(0.0)),
133 size: size(px(ANTHROPIC_SIZE_LIMIT), px(ANTHROPIC_SIZE_LIMIT)),
134 },
135 image_size,
136 );
137 dynamic_image.resize(
138 new_bounds.size.width.into(),
139 new_bounds.size.height.into(),
140 image::imageops::FilterType::Triangle,
141 )
142 } else {
143 dynamic_image
144 };
145
146 // Then enforce a default per-image size cap on the encoded PNG bytes.
147 //
148 // We always send PNG bytes (either original PNG bytes, or re-encoded PNG) base64'd.
149 // The upstream provider limit we want to respect is effectively on the binary image
150 // payload size, so we enforce against the encoded PNG bytes before base64 encoding.
151 let mut encoded_png = encode_png_bytes(&processed_image).log_err()?;
152 for _pass in 0..MAX_IMAGE_DOWNSCALE_PASSES {
153 if encoded_png.len() <= DEFAULT_IMAGE_MAX_BYTES {
154 break;
155 }
156
157 // Scale down geometrically to converge quickly. We don't know the final PNG size
158 // as a function of pixels, so we iteratively shrink.
159 let (w, h) = processed_image.dimensions();
160 if w <= 1 || h <= 1 {
161 break;
162 }
163
164 // Shrink by ~15% each pass (0.85). This is a compromise between speed and
165 // preserving image detail.
166 let new_w = ((w as f32) * 0.85).round().max(1.0) as u32;
167 let new_h = ((h as f32) * 0.85).round().max(1.0) as u32;
168
169 processed_image =
170 processed_image.resize(new_w, new_h, image::imageops::FilterType::Triangle);
171 encoded_png = encode_png_bytes(&processed_image).log_err()?;
172 }
173
174 if encoded_png.len() > DEFAULT_IMAGE_MAX_BYTES {
175 // Still too large after multiple passes; treat as non-convertible for now.
176 // (Provider-specific handling can be introduced later.)
177 return None;
178 }
179
180 // Now base64 encode the PNG bytes.
181 let base64_image = encode_bytes_as_base64(encoded_png.as_slice()).log_err()?;
182
183 // SAFETY: The base64 encoder should not produce non-UTF8.
184 let source = unsafe { String::from_utf8_unchecked(base64_image) };
185
186 Some(LanguageModelImage {
187 size: Some(image_size),
188 source: source.into(),
189 })
190 })
191 }
192
193 pub fn estimate_tokens(&self) -> usize {
194 let Some(size) = self.size.as_ref() else {
195 return 0;
196 };
197 let width = size.width.0.unsigned_abs() as usize;
198 let height = size.height.0.unsigned_abs() as usize;
199
200 // From: https://docs.anthropic.com/en/docs/build-with-claude/vision#calculate-image-costs
201 // Note that are a lot of conditions on Anthropic's API, and OpenAI doesn't use this,
202 // so this method is more of a rough guess.
203 (width * height) / 750
204 }
205
206 pub fn to_base64_url(&self) -> String {
207 format!("data:image/png;base64,{}", self.source)
208 }
209}
210
211fn encode_png_bytes(image: &image::DynamicImage) -> Result<Vec<u8>> {
212 let mut png = Vec::new();
213 image.write_with_encoder(PngEncoder::new(&mut png))?;
214 Ok(png)
215}
216
217fn encode_bytes_as_base64(bytes: &[u8]) -> Result<Vec<u8>> {
218 let mut base64_image = Vec::new();
219 {
220 let mut base64_encoder = EncoderWriter::new(
221 Cursor::new(&mut base64_image),
222 &base64::engine::general_purpose::STANDARD,
223 );
224 base64_encoder.write_all(bytes)?;
225 }
226 Ok(base64_image)
227}
228
229#[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq, Hash)]
230pub struct LanguageModelToolResult {
231 pub tool_use_id: LanguageModelToolUseId,
232 pub tool_name: Arc<str>,
233 pub is_error: bool,
234 pub content: LanguageModelToolResultContent,
235 pub output: Option<serde_json::Value>,
236}
237
238#[derive(Debug, Clone, Serialize, Eq, PartialEq, Hash)]
239pub enum LanguageModelToolResultContent {
240 Text(Arc<str>),
241 Image(LanguageModelImage),
242}
243
244impl<'de> Deserialize<'de> for LanguageModelToolResultContent {
245 fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
246 where
247 D: serde::Deserializer<'de>,
248 {
249 use serde::de::Error;
250
251 let value = serde_json::Value::deserialize(deserializer)?;
252
253 // Models can provide these responses in several styles. Try each in order.
254
255 // 1. Try as plain string
256 if let Ok(text) = serde_json::from_value::<String>(value.clone()) {
257 return Ok(Self::Text(Arc::from(text)));
258 }
259
260 // 2. Try as object
261 if let Some(obj) = value.as_object() {
262 // get a JSON field case-insensitively
263 fn get_field<'a>(
264 obj: &'a serde_json::Map<String, serde_json::Value>,
265 field: &str,
266 ) -> Option<&'a serde_json::Value> {
267 obj.iter()
268 .find(|(k, _)| k.to_lowercase() == field.to_lowercase())
269 .map(|(_, v)| v)
270 }
271
272 // Accept wrapped text format: { "type": "text", "text": "..." }
273 if let (Some(type_value), Some(text_value)) =
274 (get_field(obj, "type"), get_field(obj, "text"))
275 && let Some(type_str) = type_value.as_str()
276 && type_str.to_lowercase() == "text"
277 && let Some(text) = text_value.as_str()
278 {
279 return Ok(Self::Text(Arc::from(text)));
280 }
281
282 // Check for wrapped Text variant: { "text": "..." }
283 if let Some((_key, value)) = obj.iter().find(|(k, _)| k.to_lowercase() == "text")
284 && obj.len() == 1
285 {
286 // Only one field, and it's "text" (case-insensitive)
287 if let Some(text) = value.as_str() {
288 return Ok(Self::Text(Arc::from(text)));
289 }
290 }
291
292 // Check for wrapped Image variant: { "image": { "source": "...", "size": ... } }
293 if let Some((_key, value)) = obj.iter().find(|(k, _)| k.to_lowercase() == "image")
294 && obj.len() == 1
295 {
296 // Only one field, and it's "image" (case-insensitive)
297 // Try to parse the nested image object
298 if let Some(image_obj) = value.as_object()
299 && let Some(image) = LanguageModelImage::from_json(image_obj)
300 {
301 return Ok(Self::Image(image));
302 }
303 }
304
305 // Try as direct Image (object with "source" and "size" fields)
306 if let Some(image) = LanguageModelImage::from_json(obj) {
307 return Ok(Self::Image(image));
308 }
309 }
310
311 // If none of the variants match, return an error with the problematic JSON
312 Err(D::Error::custom(format!(
313 "data did not match any variant of LanguageModelToolResultContent. Expected either a string, \
314 an object with 'type': 'text', a wrapped variant like {{\"Text\": \"...\"}}, or an image object. Got: {}",
315 serde_json::to_string_pretty(&value).unwrap_or_else(|_| value.to_string())
316 )))
317 }
318}
319
320impl LanguageModelToolResultContent {
321 pub fn to_str(&self) -> Option<&str> {
322 match self {
323 Self::Text(text) => Some(text),
324 Self::Image(_) => None,
325 }
326 }
327
328 pub fn is_empty(&self) -> bool {
329 match self {
330 Self::Text(text) => text.chars().all(|c| c.is_whitespace()),
331 Self::Image(_) => false,
332 }
333 }
334}
335
336impl From<&str> for LanguageModelToolResultContent {
337 fn from(value: &str) -> Self {
338 Self::Text(Arc::from(value))
339 }
340}
341
342impl From<String> for LanguageModelToolResultContent {
343 fn from(value: String) -> Self {
344 Self::Text(Arc::from(value))
345 }
346}
347
348impl From<LanguageModelImage> for LanguageModelToolResultContent {
349 fn from(image: LanguageModelImage) -> Self {
350 Self::Image(image)
351 }
352}
353
354#[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq, Hash)]
355pub enum MessageContent {
356 Text(String),
357 Thinking {
358 text: String,
359 signature: Option<String>,
360 },
361 RedactedThinking(String),
362 Image(LanguageModelImage),
363 ToolUse(LanguageModelToolUse),
364 ToolResult(LanguageModelToolResult),
365}
366
367impl MessageContent {
368 pub fn to_str(&self) -> Option<&str> {
369 match self {
370 MessageContent::Text(text) => Some(text.as_str()),
371 MessageContent::Thinking { text, .. } => Some(text.as_str()),
372 MessageContent::RedactedThinking(_) => None,
373 MessageContent::ToolResult(tool_result) => tool_result.content.to_str(),
374 MessageContent::ToolUse(_) | MessageContent::Image(_) => None,
375 }
376 }
377
378 pub fn is_empty(&self) -> bool {
379 match self {
380 MessageContent::Text(text) => text.chars().all(|c| c.is_whitespace()),
381 MessageContent::Thinking { text, .. } => text.chars().all(|c| c.is_whitespace()),
382 MessageContent::ToolResult(tool_result) => tool_result.content.is_empty(),
383 MessageContent::RedactedThinking(_)
384 | MessageContent::ToolUse(_)
385 | MessageContent::Image(_) => false,
386 }
387 }
388}
389
390impl From<String> for MessageContent {
391 fn from(value: String) -> Self {
392 MessageContent::Text(value)
393 }
394}
395
396impl From<&str> for MessageContent {
397 fn from(value: &str) -> Self {
398 MessageContent::Text(value.to_string())
399 }
400}
401
402#[derive(Clone, Serialize, Deserialize, Debug, PartialEq, Hash)]
403pub struct LanguageModelRequestMessage {
404 pub role: Role,
405 pub content: Vec<MessageContent>,
406 pub cache: bool,
407 #[serde(default, skip_serializing_if = "Option::is_none")]
408 pub reasoning_details: Option<serde_json::Value>,
409}
410
411impl LanguageModelRequestMessage {
412 pub fn string_contents(&self) -> String {
413 let mut buffer = String::new();
414 for string in self.content.iter().filter_map(|content| content.to_str()) {
415 buffer.push_str(string);
416 }
417
418 buffer
419 }
420
421 pub fn contents_empty(&self) -> bool {
422 self.content.iter().all(|content| content.is_empty())
423 }
424}
425
426#[derive(Debug, PartialEq, Hash, Clone, Serialize, Deserialize)]
427pub struct LanguageModelRequestTool {
428 pub name: String,
429 pub description: String,
430 pub input_schema: serde_json::Value,
431}
432
433#[derive(Debug, PartialEq, Hash, Clone, Serialize, Deserialize)]
434pub enum LanguageModelToolChoice {
435 Auto,
436 Any,
437 None,
438}
439
440#[derive(Clone, Debug, Default, Serialize, Deserialize, PartialEq)]
441pub struct LanguageModelRequest {
442 pub thread_id: Option<String>,
443 pub prompt_id: Option<String>,
444 pub intent: Option<CompletionIntent>,
445 pub mode: Option<CompletionMode>,
446 pub messages: Vec<LanguageModelRequestMessage>,
447 pub tools: Vec<LanguageModelRequestTool>,
448 pub tool_choice: Option<LanguageModelToolChoice>,
449 pub stop: Vec<String>,
450 pub temperature: Option<f32>,
451 pub thinking_allowed: bool,
452}
453
454#[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]
455pub struct LanguageModelResponseMessage {
456 pub role: Option<Role>,
457 pub content: Option<String>,
458}
459
460#[cfg(test)]
461mod tests {
462 use super::*;
463 use base64::Engine as _;
464 use gpui::TestAppContext;
465 use image::ImageDecoder as _;
466
467 fn base64_to_png_bytes(base64_png: &str) -> Vec<u8> {
468 base64::engine::general_purpose::STANDARD
469 .decode(base64_png.as_bytes())
470 .expect("base64 should decode")
471 }
472
473 fn png_dimensions(png_bytes: &[u8]) -> (u32, u32) {
474 let decoder =
475 image::codecs::png::PngDecoder::new(Cursor::new(png_bytes)).expect("png should decode");
476 decoder.dimensions()
477 }
478
479 fn make_noisy_png_bytes(width: u32, height: u32) -> Vec<u8> {
480 // Create an RGBA image with per-pixel variance to avoid PNG compressing too well.
481 let mut img = image::RgbaImage::new(width, height);
482 for y in 0..height {
483 for x in 0..width {
484 let r = ((x ^ y) & 0xFF) as u8;
485 let g = ((x.wrapping_mul(31) ^ y.wrapping_mul(17)) & 0xFF) as u8;
486 let b = ((x.wrapping_mul(131) ^ y.wrapping_mul(7)) & 0xFF) as u8;
487 img.put_pixel(x, y, image::Rgba([r, g, b, 0xFF]));
488 }
489 }
490
491 let mut out = Vec::new();
492 image::DynamicImage::ImageRgba8(img)
493 .write_with_encoder(PngEncoder::new(&mut out))
494 .expect("png encoding should succeed");
495 out
496 }
497
498 #[gpui::test]
499 async fn test_from_image_downscales_to_default_5mb_limit(cx: &mut TestAppContext) {
500 // Pick a size that reliably produces a PNG > 5MB when filled with noise.
501 // If this fails (image is too small), bump dimensions.
502 let original_png = make_noisy_png_bytes(4096, 4096);
503 assert!(
504 original_png.len() > DEFAULT_IMAGE_MAX_BYTES,
505 "precondition failed: noisy PNG must exceed DEFAULT_IMAGE_MAX_BYTES"
506 );
507
508 let image = gpui::Image::from_bytes(ImageFormat::Png, original_png);
509 let lm_image = cx
510 .update(|cx| LanguageModelImage::from_image(Arc::new(image), cx))
511 .await
512 .expect("image conversion should succeed");
513
514 let encoded_png = base64_to_png_bytes(lm_image.source.as_ref());
515 assert!(
516 encoded_png.len() <= DEFAULT_IMAGE_MAX_BYTES,
517 "expected encoded PNG <= DEFAULT_IMAGE_MAX_BYTES, got {} bytes",
518 encoded_png.len()
519 );
520
521 // Ensure we actually downscaled in pixels (not just re-encoded).
522 let (w, h) = png_dimensions(&encoded_png);
523 assert!(
524 w < 4096 || h < 4096,
525 "expected image to be downscaled in at least one dimension; got {w}x{h}"
526 );
527 }
528
529 #[test]
530 fn test_language_model_tool_result_content_deserialization() {
531 let json = r#""This is plain text""#;
532 let result: LanguageModelToolResultContent = serde_json::from_str(json).unwrap();
533 assert_eq!(
534 result,
535 LanguageModelToolResultContent::Text("This is plain text".into())
536 );
537
538 let json = r#"{"type": "text", "text": "This is wrapped text"}"#;
539 let result: LanguageModelToolResultContent = serde_json::from_str(json).unwrap();
540 assert_eq!(
541 result,
542 LanguageModelToolResultContent::Text("This is wrapped text".into())
543 );
544
545 let json = r#"{"Type": "TEXT", "TEXT": "Case insensitive"}"#;
546 let result: LanguageModelToolResultContent = serde_json::from_str(json).unwrap();
547 assert_eq!(
548 result,
549 LanguageModelToolResultContent::Text("Case insensitive".into())
550 );
551
552 let json = r#"{"Text": "Wrapped variant"}"#;
553 let result: LanguageModelToolResultContent = serde_json::from_str(json).unwrap();
554 assert_eq!(
555 result,
556 LanguageModelToolResultContent::Text("Wrapped variant".into())
557 );
558
559 let json = r#"{"text": "Lowercase wrapped"}"#;
560 let result: LanguageModelToolResultContent = serde_json::from_str(json).unwrap();
561 assert_eq!(
562 result,
563 LanguageModelToolResultContent::Text("Lowercase wrapped".into())
564 );
565
566 // Test image deserialization
567 let json = r#"{
568 "source": "base64encodedimagedata",
569 "size": {
570 "width": 100,
571 "height": 200
572 }
573 }"#;
574 let result: LanguageModelToolResultContent = serde_json::from_str(json).unwrap();
575 match result {
576 LanguageModelToolResultContent::Image(image) => {
577 assert_eq!(image.source.as_ref(), "base64encodedimagedata");
578 let size = image.size.expect("size");
579 assert_eq!(size.width.0, 100);
580 assert_eq!(size.height.0, 200);
581 }
582 _ => panic!("Expected Image variant"),
583 }
584
585 // Test wrapped Image variant
586 let json = r#"{
587 "Image": {
588 "source": "wrappedimagedata",
589 "size": {
590 "width": 50,
591 "height": 75
592 }
593 }
594 }"#;
595 let result: LanguageModelToolResultContent = serde_json::from_str(json).unwrap();
596 match result {
597 LanguageModelToolResultContent::Image(image) => {
598 assert_eq!(image.source.as_ref(), "wrappedimagedata");
599 let size = image.size.expect("size");
600 assert_eq!(size.width.0, 50);
601 assert_eq!(size.height.0, 75);
602 }
603 _ => panic!("Expected Image variant"),
604 }
605
606 // Test wrapped Image variant with case insensitive
607 let json = r#"{
608 "image": {
609 "Source": "caseinsensitive",
610 "SIZE": {
611 "width": 30,
612 "height": 40
613 }
614 }
615 }"#;
616 let result: LanguageModelToolResultContent = serde_json::from_str(json).unwrap();
617 match result {
618 LanguageModelToolResultContent::Image(image) => {
619 assert_eq!(image.source.as_ref(), "caseinsensitive");
620 let size = image.size.expect("size");
621 assert_eq!(size.width.0, 30);
622 assert_eq!(size.height.0, 40);
623 }
624 _ => panic!("Expected Image variant"),
625 }
626
627 // Test that wrapped text with wrong type fails
628 let json = r#"{"type": "blahblah", "text": "This should fail"}"#;
629 let result: Result<LanguageModelToolResultContent, _> = serde_json::from_str(json);
630 assert!(result.is_err());
631
632 // Test that malformed JSON fails
633 let json = r#"{"invalid": "structure"}"#;
634 let result: Result<LanguageModelToolResultContent, _> = serde_json::from_str(json);
635 assert!(result.is_err());
636
637 // Test edge cases
638 let json = r#""""#; // Empty string
639 let result: LanguageModelToolResultContent = serde_json::from_str(json).unwrap();
640 assert_eq!(result, LanguageModelToolResultContent::Text("".into()));
641
642 // Test with extra fields in wrapped text (should be ignored)
643 let json = r#"{"type": "text", "text": "Hello", "extra": "field"}"#;
644 let result: LanguageModelToolResultContent = serde_json::from_str(json).unwrap();
645 assert_eq!(result, LanguageModelToolResultContent::Text("Hello".into()));
646
647 // Test direct image with case-insensitive fields
648 let json = r#"{
649 "SOURCE": "directimage",
650 "Size": {
651 "width": 200,
652 "height": 300
653 }
654 }"#;
655 let result: LanguageModelToolResultContent = serde_json::from_str(json).unwrap();
656 match result {
657 LanguageModelToolResultContent::Image(image) => {
658 assert_eq!(image.source.as_ref(), "directimage");
659 let size = image.size.expect("size");
660 assert_eq!(size.width.0, 200);
661 assert_eq!(size.height.0, 300);
662 }
663 _ => panic!("Expected Image variant"),
664 }
665
666 // Test that multiple fields prevent wrapped variant interpretation
667 let json = r#"{"Text": "not wrapped", "extra": "field"}"#;
668 let result: Result<LanguageModelToolResultContent, _> = serde_json::from_str(json);
669 assert!(result.is_err());
670
671 // Test wrapped text with uppercase TEXT variant
672 let json = r#"{"TEXT": "Uppercase variant"}"#;
673 let result: LanguageModelToolResultContent = serde_json::from_str(json).unwrap();
674 assert_eq!(
675 result,
676 LanguageModelToolResultContent::Text("Uppercase variant".into())
677 );
678
679 // Test that numbers and other JSON values fail gracefully
680 let json = r#"123"#;
681 let result: Result<LanguageModelToolResultContent, _> = serde_json::from_str(json);
682 assert!(result.is_err());
683
684 let json = r#"null"#;
685 let result: Result<LanguageModelToolResultContent, _> = serde_json::from_str(json);
686 assert!(result.is_err());
687
688 let json = r#"[1, 2, 3]"#;
689 let result: Result<LanguageModelToolResultContent, _> = serde_json::from_str(json);
690 assert!(result.is_err());
691 }
692}