[UPDATE PRIMITIVE] Fix path traversal check, add prompt fixture runner, fix comment mismatch

[Copilot]

📝 Update Information

Primitive Details

• Type: Tool (workflow prompts infrastructure)
• Name: resolvePromptFilePath, integration test runner
• Update Category: Bug Fix, Feature Enhancement

⚠️ CRITICAL: PR SCOPE VALIDATION

✅ ALLOWED FILES:

• Server implementation files (server/src/**/*.ts)
• Updated primitive implementations
• Modified registration files (server/src/tools/*.ts)
• Updated or new test files (server/test/**/*.ts)
• Documentation updates (README.md, server docs)
• Updated type definitions (server/src/types/*.ts)
• Modified supporting library files (server/src/lib/*.ts)
• Configuration updates if needed (package.json, tsconfig.json)

🚫 FORBIDDEN FILES:

• Files unrelated to the primitive update
• Temporary or test output files
• IDE configuration files
• Log files or debug output
• Analysis or summary files

🛑 MANDATORY PR VALIDATION CHECKLIST

• ONLY server implementation files are included
• NO temporary or output files are included
• NO unrelated configuration files are included
• ALL existing tests continue to pass
• NEW functionality is properly tested

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• Impact Scope: Localized

Update Metadata

• Breaking Changes: No
• API Compatibility: Maintained
• Performance Impact: Neutral

🎯 Changes Description

Addresses three unresolved review comments from PR #153.

Current Behavior

1. resolvePromptFilePath uses rel.startsWith('..') to detect path traversal, which false-positives on legitimate filenames like my..query.ql
2. Comment in e2e test says "optional sarifPath handling" but sarifPath is required in the schema
3. Prompt integration test fixtures under primitives/prompts/ are never discovered or executed by CI

Updated Behavior

1. Segment-aware traversal check: rel === '..' || rel.startsWith(..${sep}) — only flags actual .. path segments
2. Comment corrected to "sarifPath validation"
3. New runPromptIntegrationTests() discovers and executes prompt fixtures, mirroring the tool fixture pattern

Motivation

Review feedback on PR #153 identified a false-positive security check, a misleading comment, and dead test fixtures.

🔄 Before vs. After Comparison

Functionality Changes

// BEFORE: false-positive on filenames containing '..'
const rel = relative(effectiveRoot, absolutePath);
if (rel.startsWith('..') || isAbsolute(rel)) { ... }

// AFTER: segment-aware check
const rel = relative(effectiveRoot, absolutePath);
if (rel === '..' || rel.startsWith(`..${sep}`) || isAbsolute(rel)) { ... }

API Changes

No API changes.

Output Format Changes

No output format changes.

🧪 Testing & Validation

Test Coverage Updates

• Existing Tests: All 1030 server tests pass
• New Test Cases: Added test for filenames with consecutive dots (my..query.ql)
• Regression Tests: Path traversal (../../../etc/passwd) still correctly flagged
• Edge Case Tests: Consecutive-dot filename no longer false-positives

Validation Scenarios

1. Backward Compatibility: All existing resolvePromptFilePath tests pass unchanged
2. New Functionality: Prompt fixture runner discovers and executes explain_codeql_query/invalid_query_path
3. Error Handling: Prompt runner validates before/after directory structure and monitoring-state.json

Test Results

• Unit Tests: All pass (1030/1030)
• Integration Tests: Prompt fixture test passes
• Manual Testing: Validated with full build-and-test
• Performance Testing: No regressions detected

📋 Implementation Details

Files Modified

• Core Implementation: server/src/prompts/workflow-prompts.ts — fix traversal check, add sep import
• Tests: server/test/src/prompts/workflow-prompts.test.ts — add consecutive-dot filename test
• Integration Runner: client/src/lib/integration-test-runner.js — add runPromptIntegrationTests() and runSinglePromptIntegrationTest()
• E2E Test: extensions/vscode/test/suite/mcp-prompt-e2e.integration.test.ts — fix comment
• Fixtures: Updated README.md and before/monitoring-state.json to include databasePath

Code Changes Summary

• Bug Fix: Path traversal false-positive on ..-containing filenames
• Feature: Prompt fixture discovery and execution in integration test runner
• Documentation: Corrected misleading comment, updated fixture docs

Dependencies

• No New Dependencies: Update uses existing dependencies only

🔍 Quality Improvements

Bug Fixes (if applicable)

• Issue: rel.startsWith('..') flags valid paths like ..config/file or my..query.ql
• Root Cause: String prefix check doesn't distinguish path segments from filename characters
• Solution: Check for exact .. or .. followed by platform separator
• Prevention: Unit test added for consecutive-dot filenames

Code Quality Enhancements

• Testability: Prompt fixtures now exercised by CI instead of being dead artifacts
• Readability: Comment accurately describes test section purpose

🔗 References

Related Issues/PRs

• Related PRs: Improve prompt error handling and relative path support #153 (parent PR with review comments)

🚀 Compatibility & Migration

Backward Compatibility

• Fully Compatible: No breaking changes

API Evolution

• Maintained Contracts: Core API contracts preserved

👥 Review Guidelines

For Reviewers

Please verify:

• ⚠️ SCOPE COMPLIANCE: PR contains only server implementation files
• ⚠️ NO UNRELATED FILES: No temporary, output, or unrelated files
• ⚠️ BACKWARD COMPATIBILITY: Existing functionality preserved
• Functionality: Updates work as described
• Test Coverage: All existing tests pass, new tests comprehensive
• Code Quality: Maintains or improves code quality

Testing Instructions

# Full test suite
npm run build-and-test

# Specific workflow-prompts tests
cd server && npx vitest run "workflow-prompts"

# Lint and format
npm run lint
npm run format:check

📊 Impact Assessment

Server Impact

• Startup Time: No significant impact on server startup
• Runtime Stability: No impact on server stability
• Resource Usage: Reasonable resource consumption

🔄 Deployment Strategy

Rollout Considerations

• Safe Deployment: Can be deployed safely to production
• Rollback Plan: Changes are minimal and easily reversible

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