feat: list visualization in trace view #1100

olzhik11 · 2025-12-17T16:11:55Z

Note

Introduces a new Reader list view that renders span outputs (with Mustache templates) fetched via a batched outputs API, plus state, minimap, and view control updates.

UI/Trace View:
- Adds reader view with List, ListItem, MiniTree, and Markdown components; virtualized list and per-span output display.
- Replaces timeline button with ViewDropdown (tree/timeline/reader); shows zoom controls only in timeline.
- Enhances Minimap to support list data (getListMinimapSpans) and highlight visibleSpanIds; syncs with ScrollContext.
- Uses router.replace for span selection to reduce history noise; layout tweaks in components/traces/trace.tsx.
State/Store (trace-view-store.tsx):
- Extends tab to include reader; persists spanTemplates.
- New actions/selectors: getListData, getListMinimapSpans, getSpanBranch, getSpanNameInfo, getSpanTemplate, selectSpanById.
- ScrollContext now tracks visibleSpanIds and exposes scroll sync helpers.
Data fetching:
- Adds use-batched-span-outputs with SimpleLRU to fetch outputs for visible spans.
API/Backend:
- New endpoint POST /api/projects/[projectId]/traces/[traceId]/spans/outputs validating inputs and deep-parsing JSON.
- Span queries support orderBy; trace spans ordered by start_time ASC.
Utilities/Other:
- Adds deepParseJson; list/minimap/timeline helpers for reader view.
- Dependencies: adds mustache and @types/mustache.

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Important

Introduces a new reader view in trace visualization with supporting components, state management, and backend API for fetching span outputs.

UI/Trace View:
- Adds reader view with List, ListItem, MiniTree, and Markdown components; virtualized list and per-span output display.
- Replaces timeline button with ViewDropdown (tree/timeline/reader); shows zoom controls only in timeline.
- Enhances Minimap to support list data (getListMinimapSpans) and highlight visibleSpanIds; syncs with ScrollContext.
- Uses router.replace for span selection to reduce history noise; layout tweaks in components/traces/trace.tsx.
State/Store (trace-view-store.tsx):
- Extends tab to include reader; persists spanTemplates.
- New actions/selectors: getListData, getListMinimapSpans, getSpanBranch, getSpanNameInfo, getSpanTemplate, selectSpanById.
- ScrollContext now tracks visibleSpanIds and exposes scroll sync helpers.
Data fetching:
- Adds use-batched-span-outputs with SimpleLRU to fetch outputs for visible spans.
API/Backend:
- New endpoint POST /api/projects/[projectId]/traces/[traceId]/spans/outputs validating inputs and deep-parsing JSON.
- Span queries support orderBy; trace spans ordered by start_time ASC.
Utilities/Other:
- Adds deepParseJson; list/minimap/timeline helpers for reader view.
- Dependencies: adds mustache and @types/mustache.

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1. frontend/app/api/projects/[projectId]/traces/[traceId]/spans/outputs/route.ts:6

Draft comment:
Consider explicitly validating the request body (using a Zod schema) before spreading its properties into getSpanOutputs. This ensures robust input handling.
Reason this comment was not posted:
Decided after close inspection that this draft comment was likely wrong and/or not actionable: usefulness confidence = 20% vs. threshold = 50% The comment is suggesting a code quality improvement about input validation. However, the presence of ZodError handling in the catch block strongly suggests that validation is already happening, likely inside getSpanOutputs. The comment says "Consider" which makes it sound like a suggestion rather than pointing out a definite issue. According to the rules, I should not keep speculative comments or suggestions that aren't clearly necessary. Without seeing getSpanOutputs implementation, I can't confirm this is definitely needed. The comment also violates the rule about not making comments unless there's clearly a code change required - this is more of a "best practice" suggestion. The ZodError handling suggests validation might already be in place within getSpanOutputs, making this comment potentially redundant. However, it's possible that validation should happen at the API route level for better separation of concerns, which would make this a valid architectural suggestion. Even if moving validation to the route level would be architecturally better, the comment uses "Consider" which makes it a suggestion rather than identifying a clear issue. The rules state to only comment if there's clearly a code change required, not for speculative improvements. Without strong evidence that this is definitely wrong or problematic, this should be deleted. This comment should be deleted. It's a speculative suggestion ("Consider") rather than identifying a clear issue. The existing ZodError handling indicates validation is likely already happening, and without seeing the full context, there's no strong evidence that the current approach is wrong.

2. frontend/components/shared/traces/view-dropdown.tsx:13

Draft comment:
Add ARIA attributes (e.g. aria-label) to the dropdown trigger Button for better accessibility.
Reason this comment was not posted:
Decided after close inspection that this draft comment was likely wrong and/or not actionable: usefulness confidence = 10% vs. threshold = 50% The button already has descriptive text content that conveys its purpose. When a view is selected, it shows the view name (e.g., "Tree" or "Timeline"). When no view is selected, it shows "Select view". This text content is already accessible to screen readers. Adding an aria-label would actually override this visible text, which could create a disconnect between what sighted users see and what screen reader users hear. The comment appears to be a generic accessibility suggestion without considering that the button already has accessible text content. This is a new file, so the comment is about changes, but it's not a necessary change - the code is already accessible. Perhaps there's a specific accessibility concern I'm missing, such as the icon-only rendering or the ChevronDown icon not being properly labeled. However, the main content of the button is text-based and descriptive, so an aria-label seems unnecessary and could even be counterproductive. While accessibility is important, this appears to be a generic suggestion that doesn't account for the fact that the button already has descriptive text content. The visible text ("Tree", "Timeline", or "Select view") is sufficient for accessibility. This comment doesn't identify a specific accessibility problem that needs fixing. This comment should be deleted. The button already has descriptive text content that is accessible to screen readers. Adding an aria-label would be redundant and potentially harmful as it would override the visible text. This is a generic accessibility suggestion that doesn't apply to this specific implementation.

3. frontend/components/traces/trace-view/index.tsx:197

Draft comment:
Using router.replace for URL updates (instead of push) is a good decision to avoid adding extra history entries. Ensure this behavior is consistent with overall navigation.
Reason this comment was not posted:
Comment did not seem useful. Confidence is useful = 20% <= threshold 50% This comment is asking the author to ensure consistency in the use of router.replace, which is a general request for confirmation rather than a specific suggestion or identification of an issue. It doesn't provide a specific suggestion or point out a potential problem with the code.

4. frontend/components/traces/trace-view/list/use-batched-span-outputs.ts:98

Draft comment:
Consider adding an explicit cleanup (e.g. in a useEffect cleanup) to clear timer.current on unmount to avoid potential memory leaks.
Reason this comment was not posted:
Decided after close inspection that this draft comment was likely wrong and/or not actionable: usefulness confidence = 20% vs. threshold = 50% The comment is technically correct - there is no cleanup function to clear the timer on unmount, which could theoretically cause a memory leak if the component unmounts while a timer is pending. However, this violates the rule about not making speculative comments. The comment uses "Consider" and mentions "potential memory leaks" which is speculative language. Additionally, the presence of the commented-out cleanup code suggests the author was aware of this pattern and chose not to implement it, possibly for good reasons (e.g., the timer callback uses refs which are safe, or the component lifecycle makes this unnecessary). The comment doesn't provide strong evidence that this is definitely a problem that needs fixing. The timer cleanup is a common React pattern and the lack of it could be a legitimate issue. The commented-out code suggests this was intentionally left out, but that doesn't mean it's correct. Memory leaks from timers are a real concern in React applications. While timer cleanup is a common pattern, the comment uses speculative language ("potential memory leaks") and doesn't demonstrate that this is definitely a problem. The rules state "Do NOT make speculative comments, such as 'If X, then Y is an issue'. Only comment if it is definitely an issue." The word "Consider" also makes this a suggestion rather than identifying a clear bug. The commented-out code indicates the author was aware of this pattern and chose not to use it. This comment should be deleted because it's speculative (uses "potential" and "Consider") and doesn't provide strong evidence that this is definitely a problem requiring a fix. The presence of commented-out cleanup code suggests the author was aware of this pattern and made a deliberate choice.

5. frontend/components/traces/trace-view/trace-view-store.tsx:313

Draft comment:
The magic UUID '00000000-0000-0000-0000-000000000000' appears multiple times. Extract it into a named constant for clarity and ease of maintenance.
Reason this comment was not posted:
Comment was not on a location in the diff, so it can't be submitted as a review comment.

6. frontend/components/traces/trace-view/view-dropdown.tsx:12

Draft comment:
Good implementation of the view dropdown. For consistency, consider adding ARIA labels to enhance screen reader accessibility.
Reason this comment was not posted:
Decided after close inspection that this draft comment was likely wrong and/or not actionable: usefulness confidence = 10% vs. threshold = 50% This comment falls into several problematic categories: 1) It says "consider" which makes it a suggestion rather than pointing out a clear issue, 2) It's not specific about what ARIA labels are missing or needed, 3) The Button already has visible text content which provides accessibility, 4) UI component libraries like the one being used typically handle ARIA attributes internally, 5) This is a general code quality suggestion rather than pointing out a specific bug or issue. The rules state not to make comments that are obvious or unimportant, and to only comment if there's clearly a code change required. This is a "nice to have" suggestion without strong evidence of an actual accessibility problem. I might be missing that there's a specific accessibility standard this codebase follows that requires explicit ARIA labels even when visible text is present. The UI component library might not handle ARIA attributes automatically, and this could be a legitimate gap. Even if there are accessibility standards, the comment is too vague and non-actionable. It doesn't specify what ARIA labels are needed (aria-label? aria-labelledby? aria-describedby?). Without concrete evidence of what's missing and why, this is just a speculative suggestion. The button has visible text and icons, which is typically sufficient for screen readers. This comment should be deleted. It's a vague, non-actionable suggestion that uses "consider" language and doesn't point to a specific accessibility issue. The Button already has visible text content, and there's no strong evidence that additional ARIA labels are required.

7. frontend/lib/actions/spans/outputs.ts:20

Draft comment:
The error handling in getSpanOutputs is clear. Logging the error and throwing a new error provides useful debugging information.
Reason this comment was not posted:
Comment did not seem useful. Confidence is useful = 0% <= threshold 50% This comment is purely informative and does not provide any actionable feedback or suggestions for improvement. It simply praises the existing code without offering any constructive criticism or questions.

8. frontend/lib/actions/spans/utils.ts:155

Draft comment:
Ensure the default orderBy clause (for start_time DESC) aligns with desired UI behavior, especially for timeline views.
Reason this comment was not posted:
Comment did not seem useful. Confidence is useful = 30% <= threshold 50% The comment is asking the author to ensure that the orderBy clause aligns with the desired UI behavior. This is a request for confirmation, which violates the rules. However, it does point out a specific part of the code (orderBy clause) and its potential impact on UI behavior, which could be useful if rephrased as a suggestion or observation rather than a request for confirmation.

9. frontend/package.json:125

Draft comment:
Double-check that dependency versions (e.g. mustache and streamdown) remain fully compatible with all changes. Consider adding tests to confirm these integrations.
Reason this comment was not posted:
Comment did not seem useful. Confidence is useful = 0% <= threshold 50% This comment is asking the PR author to double-check dependency versions and to consider adding tests for integrations. It violates the rule against asking the author to double-check things and ensure compatibility. It also touches on dependencies, which should not be commented on unless there's a specific issue identified.

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frontend/components/traces/trace-view/list/index.tsx

frontend/app/api/projects/[projectId]/traces/[traceId]/spans/outputs/route.ts

cursor

Bug: Shared trace view renders empty when tab is "list"

The tab state is now persisted to localStorage. If a user sets tab to "list" in the main trace view, then opens a shared trace view, the persisted value is loaded. However, the shared trace view only handles tab === "timeline" and tab === "tree" conditions, so when tab is "list", the ResizablePanel renders nothing, leaving users with an empty panel. The shared view needs to either handle the "list" tab or fallback to a default view.

frontend/components/shared/traces/trace-view.tsx#L212-L221

lmnr/frontend/components/shared/traces/trace-view.tsx

Lines 212 to 221 in 8f6257a

    
           <ResizablePanelGroup direction="vertical"> 
        
             <ResizablePanel className="flex flex-col flex-1 h-full overflow-hidden relative"> 
        
               {tab === "timeline" && <Timeline />} 
        
               {tab === "tree" && ( 
        
                 <div className="flex flex-1 overflow-hidden relative"> 
        
                   <Tree onSpanSelect={handleSpanSelect} /> 
        
                   <Minimap onSpanSelect={handleSpanSelect} /> 
        
                 </div> 
        
               )} 
        
             </ResizablePanel>

frontend/components/traces/trace-view/trace-view-store.tsx#L370-L371

lmnr/frontend/components/traces/trace-view/trace-view-store.tsx

Lines 370 to 371 in 8f6257a

    
           spanTemplates: state.spanTemplates, 
        
           tab: state.tab,

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1. frontend/components/traces/trace-view/list/list-item.tsx:84

Draft comment:
Added animation classes 'animate-in fade-in duration-200' to the metadata container. Ensure these classes are defined in your utility framework and align with design guidelines.
Reason this comment was not posted:
Confidence changes required: 0% <= threshold 50% None

2. frontend/components/traces/trace-view/list/list-item.tsx:104

Draft comment:
Animation classes added to the settings button. Verify that 'animate-in fade-in duration-200' produces the desired consistent effect with other interactive elements.
Reason this comment was not posted:
Confidence changes required: 0% <= threshold 50% None

3. frontend/components/traces/trace-view/list/markdown.tsx:101

Draft comment:
Updated text size classes from 'text-xs' to 'text-sm' for markdown elements (p, li, ul, code) to improve readability. Confirm that this change maintains overall UI consistency.
Reason this comment was not posted:
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frontend/components/traces/trace-view/list/use-batched-span-outputs.tsx

frontend/components/traces/trace-view/index.tsx

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1. frontend/app/api/projects/[projectId]/traces/[traceId]/spans/outputs/route.ts:15

Draft comment:
Good extraction of spanIds, startDate, and endDate from the request body. Ensure that these values are validated (e.g., with a schema) on the server to handle malformed input.
Reason this comment was not posted:
Confidence changes required: 33% <= threshold 50% None

2. frontend/components/traces/trace-view/list/index.tsx:198

Draft comment:
Switching from MustacheTemplateDialog to MustacheTemplateSheet is clear. Verify that getOutput handles empty span IDs gracefully when settingsSpan is null.
Reason this comment was not posted:
Confidence changes required: 33% <= threshold 50% None

3. frontend/components/traces/trace-view/list/mustache-template-sheet.tsx:32

Draft comment:
Computing the spanPathKey with a fallback empty string when span is null may lead to key collisions. Ensure that a null span state is handled explicitly if needed.
Reason this comment was not posted:
Confidence changes required: 50% <= threshold 50% None

4. frontend/components/traces/trace-view/list/mustache-template-sheet.tsx:41

Draft comment:
The useEffect updates templateInput based on savedTemplate but doesn’t handle the case when span becomes null. Consider clearing templateInput when there is no valid span.
Reason this comment was not posted:
Confidence changes required: 33% <= threshold 50% None

5. frontend/components/traces/trace-view/list/use-batched-span-outputs.ts:28

Draft comment:
Timer is typed as NodeJS.Timeout, but in a browser environment setTimeout returns a number. Consider using 'ReturnType' for cross‐environment compatibility.
Reason this comment was not posted:
Comment was not on a location in the diff, so it can't be submitted as a review comment.

6. frontend/lib/actions/common/utils.ts:37

Draft comment:
The deepParseJson function recursively parses JSON values. Be aware of potential stack overflow issues with very deep or malformed JSON structures.
Reason this comment was not posted:
Confidence changes required: 33% <= threshold 50% None

7. frontend/lib/actions/spans/outputs.ts:39

Draft comment:
Using deepParseJson(tryParseJson(result.output)) ensures nested JSON is fully parsed. Confirm that this double parsing approach handles all expected output cases without unintended recursion.
Reason this comment was not posted:
Confidence changes required: 33% <= threshold 50% None

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frontend/components/traces/trace-view/trace-view-store-utils.ts

frontend/components/traces/trace-view/list/mustache-template-sheet.tsx

…onditions

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1. frontend/components/traces/trace-view/index.tsx:502

Draft comment:
Passing the new 'traceId' prop to the List component is correctly implemented. Ensure that the TS interface remains updated.
Reason this comment was not posted:
Confidence changes required: 0% <= threshold 50% None

2. frontend/components/traces/trace-view/list/index.tsx:2

Draft comment:
The unused import 'pick' has been removed for cleaner code – this change is appropriate.
Reason this comment was not posted:
Confidence changes required: 0% <= threshold 50% None

3. frontend/components/traces/trace-view/list/list-item.tsx:102

Draft comment:
Disabling the settings button when output is loading (using disabled={isLoadingOutput}) improves the UX and prevents premature interactions.
Reason this comment was not posted:
Confidence changes required: 0% <= threshold 50% None

4. frontend/components/traces/trace-view/list/markdown.tsx:66

Draft comment:
Removing the 'isLoadingOutput' prop from Markdown simplifies its logic, and the added list styling (for ul/ol) enhances readability.
Reason this comment was not posted:
Confidence changes required: 0% <= threshold 50% None

5. frontend/components/traces/trace-view/list/mustache-template-sheet.tsx:183

Draft comment:
The use of a key (using spanPathKey) on MustacheTemplateSheetContent ensures the component resets correctly when the span path changes.
Reason this comment was not posted:
Confidence changes required: 0% <= threshold 50% None

6. frontend/components/traces/trace-view/list/use-batched-span-outputs.ts:114

Draft comment:
Consider adding a cleanup return in the useEffect hook that schedules the setTimeout, to clear any pending timers on unmount and avoid potential memory leaks.
Reason this comment was not posted:
Comment was not on a location in the diff, so it can't be submitted as a review comment.

7. frontend/components/traces/trace-view/timeline.tsx:33

Draft comment:
Including 'storeSpans' in the dependency array for getTimelineData memoization ensures that timeline data updates properly when spans change.
Reason this comment was not posted:
Confidence changes required: 0% <= threshold 50% None

8. frontend/components/traces/trace-view/utils.ts:227

Draft comment:
Sorting the new spans by startTime before aggregation guarantees proper chronological order — a beneficial improvement.
Reason this comment was not posted:
Confidence changes required: 0% <= threshold 50% None

9. frontend/lib/actions/spans/outputs.ts:22

Draft comment:
Review the time filtering logic: the upper bound condition uses 'start_time <= {endDate: String}'. Confirm if this is intended or if 'end_time' should be used instead.
Reason this comment was not posted:
Decided after close inspection that this draft comment was likely wrong and/or not actionable: usefulness confidence = 10% vs. threshold = 50% The comment is phrased as "Confirm if this is intended" which is explicitly asking the author to verify their intention. This violates the rules. However, I need to consider if there's actually a bug here. Using start_time for both bounds could be intentional if they want to filter spans that started within a time range. Alternatively, using end_time for the upper bound might be more appropriate if they want spans that were active during the time range. Without more context about the business logic, I cannot definitively say this is wrong. The comment doesn't provide strong evidence of a bug, it's just questioning the design choice. The comment might be highlighting a legitimate design issue where filtering by start_time on both ends could miss spans that started before the range but ended within it. This could be a real bug depending on the intended behavior. While there could be a design consideration here, the comment doesn't assert that there IS a bug - it asks the author to "confirm" their intention. This is explicitly against the rules. If the tool was confident this was wrong, it should have stated it definitively and suggested a fix, not asked for confirmation. This comment should be deleted because it asks the author to confirm their intention rather than asserting a definite issue. The phrasing "Confirm if this is intended" violates the rule against asking authors to verify, explain, or double-check their work.

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1. frontend/components/traces/trace-view/list/markdown.tsx:110

Draft comment:
Indentation increased from pl-4 to pl-6 for ul. Confirm this is consistent with design guidelines and other markdown components.
Reason this comment was not posted:
Confidence changes required: 0% <= threshold 50% None

2. frontend/components/traces/trace-view/list/markdown.tsx:116

Draft comment:
Indentation increased from pl-4 to pl-6 for ol. Ensure this adjustment aligns with overall markdown styling.
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frontend/components/traces/trace-view/list/use-batched-span-outputs.tsx

frontend/components/traces/trace-view/trace-view-store.tsx

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1. frontend/components/traces/trace-view/list/use-batched-span-outputs.ts:1

Draft comment:
Importing lodash's get is fine, but ensure that adding this dependency is justified; if only used in one spot, consider inlining a simple safe accessor.
Reason this comment was not posted:
Confidence changes required: 0% <= threshold 50% None

2. frontend/components/traces/trace-view/list/use-batched-span-outputs.ts:63

Draft comment:
Using lodash's get with a default of null is safer, but verify that downstream consumers handle null (instead of undefined) correctly.
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1. frontend/components/traces/trace-view/list/list-item.tsx:64

Draft comment:
The expand/collapse button’s inline toggle (using e.stopPropagation and setIsExpanded) has been moved next to the display name. Ensure this UI change is intentional and consider extracting the handler for clarity.
Reason this comment was not posted:
Decided after close inspection that this draft comment was likely wrong and/or not actionable: usefulness confidence = 10% vs. threshold = 50% This comment violates multiple rules: 1) It asks the author to "ensure" something is intentional, which is explicitly forbidden ("Do NOT ask the PR author to confirm their intention, to explain, to double-check things, to ensure the behavior is intended"). 2) It's about a UI/styling change - the positioning of a button - and the rules state "Do NOT comment on any pure frontend UI or styling changes, only logic. Assume that if the author changed the UI, they did it correctly." 3) The suggestion to "consider extracting the handler" is vague and not clearly actionable - the handler is just two lines (e.stopPropagation and setIsExpanded toggle), which is quite simple and doesn't obviously need extraction. The comment doesn't provide strong evidence that extraction would improve the code. Perhaps the handler extraction suggestion could be considered a valid code quality refactor? Maybe there's a legitimate concern about code organization that I'm missing? The handler is only 2 lines and is used inline in only one place. Extracting it would not meaningfully improve readability or maintainability. The suggestion is not actionable enough to be valuable. The primary issue is that this comment asks the author to "ensure" the change is intentional, which directly violates the rules. This comment should be deleted. It asks the author to confirm their intention ("Ensure this UI change is intentional"), which is explicitly forbidden. It also comments on a UI positioning change, which the rules say to assume was done correctly. The handler extraction suggestion is too vague to be actionable.

2. frontend/components/traces/trace-view/list/mustache-template-sheet.tsx:61

Draft comment:
Adding 'flex-shrink-0' to the SheetHeader ensures it remains fixed during scrolling—verify that this behavior matches the intended design across similar components.
Reason this comment was not posted:
Comment did not seem useful. Confidence is useful = 0% <= threshold 50% The comment is asking the PR author to verify if the behavior matches the intended design, which is against the rules. It doesn't provide a specific suggestion or point out a clear issue with the code.

3. frontend/components/traces/trace-view/list/mustache-template-sheet.tsx:118

Draft comment:
The suggestion buttons append their template without a separator. Consider adding a delimiter (e.g., a space) to avoid potential formatting issues.
Reason this comment was not posted:
Comment was on unchanged code.

4. frontend/components/traces/trace-view/list/mustache-template-sheet.tsx:107

Draft comment:
Confirm that the CodeMirror onChange callback returns a string as expected. Any API changes might lead to state mismatches when updating templateInput.
Reason this comment was not posted:
Comment did not seem useful. Confidence is useful = 0% <= threshold 50% The comment is asking the PR author to confirm the behavior of the CodeMirror onChange callback, which violates the rule against asking for confirmation of intended behavior. It does not provide a specific suggestion or point out a clear issue with the code.

5. frontend/components/traces/trace-view/list/list-item.tsx:84

Draft comment:
The class name "group-hover/message:flex" looks suspicious. Typically in Tailwind the variant separator is a colon (:) rather than a slash (/). Did you mean "group-hover:flex" or a different variant modifier?
Reason this comment was not posted:
Comment was not on a location in the diff, so it can't be submitted as a review comment.

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frontend/components/traces/trace-view/index.tsx

cursor

Bug: Persisted tab breaks shared trace view content

The tab state is now persisted to localStorage in the store's partialize option. However, the shared trace view only renders content for tab === "timeline" or tab === "tree". If a user was on the "reader" tab (or "chat"/"metadata") in the main trace view and then navigates to a shared trace view, the persisted tab value causes an empty content area since those tabs aren't supported. The shared view dropdown shows "Select view" but users may not realize they need to manually select a valid tab.

frontend/components/shared/traces/trace-view.tsx#L212-L221

lmnr/frontend/components/shared/traces/trace-view.tsx

Lines 212 to 221 in 4982dac

    
           <ResizablePanelGroup direction="vertical"> 
        
             <ResizablePanel className="flex flex-col flex-1 h-full overflow-hidden relative"> 
        
               {tab === "timeline" && <Timeline />} 
        
               {tab === "tree" && ( 
        
                 <div className="flex flex-1 overflow-hidden relative"> 
        
                   <Tree onSpanSelect={handleSpanSelect} /> 
        
                   <Minimap onSpanSelect={handleSpanSelect} /> 
        
                 </div> 
        
               )} 
        
             </ResizablePanel>

frontend/components/traces/trace-view/trace-view-store.tsx#L365-L371

lmnr/frontend/components/traces/trace-view/trace-view-store.tsx

Lines 365 to 371 in 4982dac

    
           { 
        
             name: "trace-view-state", 
        
             partialize: (state) => ({ 
        
               treeWidth: state.treeWidth, 
        
               spanPath: state.spanPath, 
        
               spanTemplates: state.spanTemplates, 
        
               tab: state.tab,

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1. frontend/components/traces/trace-view/list/mustache-template-sheet.tsx:73

Draft comment:
Removed 'min-h-32' class from the output container. Confirm if the loss of a minimum height is intentional.
Reason this comment was not posted:
Decided after close inspection that this draft comment was likely wrong and/or not actionable: usefulness confidence = 10% vs. threshold = 50% The comment is asking the author to "confirm" if the change is intentional. This violates the rule that says "Do NOT ask the PR author to confirm their intention, to explain, to double-check things, to ensure the behavior is intended." The author clearly made this change deliberately across multiple locations in the file, removing min-h-32 consistently. This is a pure UI/styling change, and the rules state "Do NOT comment on any pure frontend UI or styling changes, only logic. Assume that if the author changed the UI, they did it correctly." The comment doesn't identify a bug or logic error - it's just questioning a styling decision. Perhaps the removal of minimum height could cause layout issues or make the UI look broken in certain scenarios. The author might have accidentally removed it without considering all edge cases. Even if there could be layout issues, the comment doesn't identify a specific problem - it just asks for confirmation. The author removed min-h-32 from multiple places consistently, suggesting this was a deliberate styling change. Without evidence of an actual bug, this is just questioning a UI decision, which the rules explicitly say not to do. This comment should be deleted because it asks the author to confirm their intention about a UI/styling change, which violates the rules. The change was clearly deliberate and consistent across the file, and there's no evidence of an actual bug.

2. frontend/components/traces/trace-view/list/mustache-template-sheet.tsx:83

Draft comment:
Added 'text-sm' class to the fallback 'No output available' span for text sizing consistency.
Reason this comment was not posted:
Confidence changes required: 0% <= threshold 50% None

3. frontend/components/traces/trace-view/list/mustache-template-sheet.tsx:105

Draft comment:
Removed 'min-h-32' from the template input container. Verify that the editor maintains a comfortable minimum height.
Reason this comment was not posted:
Comment did not seem useful. Confidence is useful = 0% <= threshold 50% The comment is asking the PR author to verify the behavior of the editor after a change, which violates the rule against asking the author to ensure behavior is intended or tested. It does not provide a specific suggestion or point out a clear issue.

4. frontend/components/traces/trace-view/list/mustache-template-sheet.tsx:134

Draft comment:
Changed result container from fixed height ('h-80') to flexible ('flex-1'). Ensure this adjustment meets your layout requirements across different viewport sizes.
Reason this comment was not posted:
Comment did not seem useful. Confidence is useful = 0% <= threshold 50% The comment is asking the PR author to ensure that the layout adjustment meets requirements across different viewport sizes. This falls under asking the author to double-check or ensure behavior, which is against the rules.

5. frontend/components/traces/trace-view/list/mustache-template-sheet.tsx:137

Draft comment:
Added 'max-h-96' to the Markdown component rendering the result. Confirm that this maximum height does not clip extended output unexpectedly.
Reason this comment was not posted:
Comment did not seem useful. Confidence is useful = 0% <= threshold 50% The comment is asking the author to confirm that the maximum height does not clip extended output unexpectedly. This falls under asking the author to confirm their intention or to ensure the behavior is intended, which is against the rules.

6. frontend/components/traces/trace-view/list/mustache-template-sheet.tsx:143

Draft comment:
Removed the 'h-full' class from the fallback span in the result section. Verify that vertical alignment remains visually acceptable.
Reason this comment was not posted:
Comment did not seem useful. Confidence is useful = 0% <= threshold 50% The comment is asking the PR author to verify the visual alignment after a class removal. This falls under asking the author to ensure the behavior is intended or to double-check things, which is against the rules.

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1. frontend/components/traces/trace.tsx:13

Draft comment:
Verify that changing the divider's class from grow border-t to flex-none border-t is intended. This change fixes its size and may affect layout spacing.
Reason this comment was not posted:
Comment looked like it was already resolved.

2. frontend/components/traces/trace.tsx:14

Draft comment:
The new flex container wrapping the TraceView ensures proper layout, but consider if an explicit overflow (e.g. overflow-y-auto) is needed for scrolling content.
Reason this comment was not posted:
Decided after close inspection that this draft comment was likely wrong and/or not actionable: usefulness confidence = 15% vs. threshold = 50% The comment uses the word "Consider if" which makes it speculative. The rules explicitly state "Do NOT make speculative comments, such as 'If X, then Y is an issue'. Only comment if it is definitely an issue." The comment doesn't identify a definite problem - it's asking the author to think about whether overflow might be needed. This is exactly the kind of "verify that" or "consider whether" comment that should be removed. The author made a deliberate change to the flex structure including adding min-h-0, which suggests they're aware of flex container behavior. Without evidence that scrolling is actually broken, this is just speculation. The author did add min-h-0 which is specifically used for enabling scrolling in flex containers, suggesting they may have already considered overflow behavior. However, it's possible that overflow handling is genuinely missing and would cause a real bug. While overflow handling might be important, the comment is phrased speculatively ("Consider if...") and doesn't demonstrate that there's actually a problem. Without seeing the TraceView component or evidence that scrolling is broken, this is just asking the author to double-check their work, which violates the rules. This comment should be deleted because it's speculative and asks the author to "consider" something rather than pointing to a definite issue. It falls under the rule against speculative comments and asking authors to verify/ensure things.

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1. frontend/components/traces/trace-view/list/use-batched-span-outputs.ts:5

Draft comment:
Good change: Using the centralized SimpleLRU import from '@/lib/simple-lru.ts' instead of the local version improves code reuse. Ensure the local module is removed if no longer needed.
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Confidence changes required: 0% <= threshold 50% None

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1. frontend/components/traces/trace-view/list/index.tsx:8

Draft comment:
Ensure consistent import paths: the .ts extension was removed here. Confirm that your module resolution/settings allow omitting file extensions consistently across the codebase.
Reason this comment was not posted:
Comment looked like it was already resolved.

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cursor

Bug: Shared trace view shows empty content for unsupported tabs

The tab state is persisted to localStorage (line 371 in the store), but the shared trace view only renders content for "tree" and "timeline" tabs. If a user was previously on the "reader", "chat", or "metadata" tab in the regular trace view and then navigates to a shared trace, the content area renders empty since none of the tab conditions match. The shared view's dropdown shows "Select view" but doesn't auto-select a valid fallback, leaving users with a blank screen until they manually select a tab.

frontend/components/shared/traces/trace-view.tsx#L213-L220

lmnr/frontend/components/shared/traces/trace-view.tsx

Lines 213 to 220 in c2135b3

    
           <ResizablePanel className="flex flex-col flex-1 h-full overflow-hidden relative"> 
        
             {tab === "timeline" && <Timeline />} 
        
             {tab === "tree" && ( 
        
               <div className="flex flex-1 overflow-hidden relative"> 
        
                 <Tree onSpanSelect={handleSpanSelect} /> 
        
                 <Minimap onSpanSelect={handleSpanSelect} /> 
        
               </div> 
        
             )}

frontend/components/traces/trace-view/trace-view-store.tsx#L370-L371

lmnr/frontend/components/traces/trace-view/trace-view-store.tsx

Lines 370 to 371 in c2135b3

    
           spanTemplates: state.spanTemplates, 
        
           tab: state.tab,

olzhik11 added 4 commits December 17, 2025 15:15

feat: new spans visualization WIP

501440e

Merge branch 'dev' into feat/LAM-1041

69bb90a

feat: small ui fixes

aa6a6e4

feat: update shared trace

8f6257a

olzhik11 self-assigned this Dec 17, 2025

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frontend/components/traces/trace-view/list/index.tsx Show resolved Hide resolved

cursor bot reviewed Dec 17, 2025

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frontend/app/api/projects/[projectId]/traces/[traceId]/spans/outputs/route.ts Outdated Show resolved Hide resolved

cursor bot reviewed Dec 17, 2025

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olzhik11 added 2 commits December 17, 2025 16:21

feat: rename to reader

7447083

tmp

1379d77

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frontend/components/traces/trace-view/list/use-batched-span-outputs.tsx Show resolved Hide resolved

frontend/components/traces/trace-view/index.tsx Show resolved Hide resolved

feat: move to sheet, deep parse json, fix comments

600794d

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Merge branch 'dev' into feat/LAM-1041

9809a3c

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frontend/components/traces/trace-view/trace-view-store-utils.ts Show resolved Hide resolved

frontend/components/traces/trace-view/list/mustache-template-sheet.tsx Outdated Show resolved Hide resolved

feat: address comments, sort on realtime insert, trace id timerange c…

b7ebd9f

…onditions