perf: optimize SubagentLocator to reduce file I/O#110
perf: optimize SubagentLocator to reduce file I/O#110MintCollector wants to merge 1 commit intomatt1398:mainfrom
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Summary of ChangesHello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request significantly enhances the performance of the Highlights
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The pull request optimizes file content checks in SubagentLocator.ts by using readline to stream only the first line for subagentBelongsToSession, avoiding full file reads. However, the change in hasSubagents and hasSubagentsSync to only check for a non-zero file size instead of non-whitespace content might unintentionally validate files with only whitespace. Additionally, the removal of certain JSDoc lines from hasSubagentsSync has reduced the clarity and completeness of its documentation.
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src/main/services/discovery/SubagentLocator.ts (60-62)
The previous implementation checked content.trim().length > 0 to ensure the file contained actual non-whitespace content. By removing this check and relying solely on stats.size > 0, a file consisting only of whitespace characters would now be considered a valid subagent file. This could be an unintended semantic change if "non-empty content" implies more than just a non-zero file size.
src/main/services/discovery/SubagentLocator.ts (79-81)
The removed lines from the JSDoc provided important context about the hasSubagentsSync method's behavior, specifically that it checks for session-specific subagent files and only in the NEW structure. Restoring these details would improve the clarity and completeness of the documentation.
/**
* Checks if a session has subagent files (session-specific only).
* Only checks the NEW structure: {projectId}/{sessionId}/subagents/
* Verifies that at least one subagent file has non-empty content.
📝 WalkthroughWalkthroughReplace full-file reads with metadata checks and streaming-first-line JSON parsing in SubagentLocator: Changes
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⚠️ Outside diff range comments (1)
src/main/services/discovery/SubagentLocator.ts (1)
77-82:⚠️ Potential issue | 🔴 CriticalCritical syntax error: Missing JSDoc opening marker.
The JSDoc comment for
hasSubagentsSyncis missing the opening/**delimiter. Lines 77–82 start with* Verifies...without the required/**prefix, which breaks JSDoc parsing and will prevent TypeScript from recognizing the documentation block.Fix
return false; } +/** * Verifies that at least one subagent file has non-empty content. * * `@param` projectId - The project ID * `@param` sessionId - The session ID * `@returns` true if subagents exist */ hasSubagentsSync(projectId: string, sessionId: string): boolean {🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@src/main/services/discovery/SubagentLocator.ts` around lines 77 - 82, The JSDoc block for hasSubagentsSync in SubagentLocator.ts is missing its opening /** delimiter which breaks JSDoc parsing; fix by adding the opening /** immediately before the existing lines that start with " * Verifies..." so the comment becomes a valid JSDoc block for the hasSubagentsSync method (ensure the comment directly precedes the hasSubagentsSync function declaration).
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Outside diff comments:
In `@src/main/services/discovery/SubagentLocator.ts`:
- Around line 77-82: The JSDoc block for hasSubagentsSync in SubagentLocator.ts
is missing its opening /** delimiter which breaks JSDoc parsing; fix by adding
the opening /** immediately before the existing lines that start with " *
Verifies..." so the comment becomes a valid JSDoc block for the hasSubagentsSync
method (ensure the comment directly precedes the hasSubagentsSync function
declaration).
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src/main/services/discovery/SubagentLocator.ts
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Thanks for the PR! Could you rebase on main to resolve the merge conflicts? |
- hasSubagents(): Remove redundant readFile after stat size check; stat.size > 0 is sufficient to confirm non-empty files - hasSubagentsSync(): Same optimization using statSync instead of reading entire file contents - subagentBelongsToSession(): Use createReadStream + readline to stream only the first line instead of reading entire file via readFile, then close the stream immediately Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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⚠️ Outside diff range comments (1)
src/main/services/discovery/SubagentLocator.ts (1)
53-67:⚠️ Potential issue | 🟡 MinorBehavior change: whitespace-only files now count as non-empty.
Previously the contents were read and trimmed, so a file containing only whitespace (e.g., a lone
\n) was treated as empty. Withstat().size > 0, such files now causehasSubagentsto returntrue. Per theProjectScannercaller contract noted for this method, whitespace-only files should not be reported as having subagents.If this edge case is realistic in your data (e.g., files created but never written to beyond a newline), consider a small size threshold or a lightweight first-line check instead.
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@src/main/services/discovery/SubagentLocator.ts` around lines 53 - 67, The current SubagentLocator loop uses this.fsProvider.stat(filePath) and stats.size > 0 which treats whitespace-only files as non-empty; change the check to read the file contents (or at least the first small chunk) via this.fsProvider.readFile(filePath, 'utf8') (or an equivalent read method on fsProvider) and test trimmedContent.length > 0 (or check for any non-whitespace character) before returning true; keep the existing try/catch and logger.debug for errors and apply this change around the loop that iterates subagentFiles and constructs filePath from newSubagentsPath.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Outside diff comments:
In `@src/main/services/discovery/SubagentLocator.ts`:
- Around line 53-67: The current SubagentLocator loop uses
this.fsProvider.stat(filePath) and stats.size > 0 which treats whitespace-only
files as non-empty; change the check to read the file contents (or at least the
first small chunk) via this.fsProvider.readFile(filePath, 'utf8') (or an
equivalent read method on fsProvider) and test trimmedContent.length > 0 (or
check for any non-whitespace character) before returning true; keep the existing
try/catch and logger.debug for errors and apply this change around the loop that
iterates subagentFiles and constructs filePath from newSubagentsPath.
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Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
Run ID: e54c0052-358b-41ef-b361-dc7fc68b78b2
📒 Files selected for processing (1)
src/main/services/discovery/SubagentLocator.ts
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Summary
hasSubagents()/hasSubagentsSync(): Usesstat.size > 0instead of reading entire file contents — avoids unnecessary I/O for existence checkssubagentBelongsToSession(): Streams only the first line viareadline.createInterface()instead of reading the entire file into memoryAddresses #95
Test plan
createReadStreamis available onFileSystemProviderinterface🤖 Generated with Claude Code
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