# AgentOps Phase 1.1 Implementation Summary
## Overview
Hardened signal collection by replacing brittle regex-based parsing with robust solutions.
**Status:** ✅ Complete
**Date:** 2026-01-29
**Risk Level:** LOW
**Test Coverage:** 24/24 passing (100%)
---
## Changes Implemented
### Phase 1: arXiv XML Parser
**Replaced regex-based XML parsing with fast-xml-parser**
**Files Modified:**
- `agentops/runner/lib/sources/arxiv.ts` - Core arXiv collector
- `package.json` - Added fast-xml-parser@^4.5.3 dependency
**Files Created:**
- `agentops/tests/xml-parsing.test.ts` - 5 unit tests for XML parser
**Key Improvements:**
- ✅ Handles XML structure changes (element order, nesting)
- ✅ Properly handles single vs array entries
- ✅ Clearer field extraction (no regex matching)
- ✅ Better error messages if XML is invalid
- ✅ Whitespace normalization preserved
**Before (regex):**
```typescript
const entryRegex = /<entry>([\s\S]*?)<\/entry>/g;
const entries = [...xml.matchAll(entryRegex)];
```
**After (XML parser):**
```typescript
const parser = new XMLParser({
ignoreAttributes: false,
attributeNamePrefix: '@_',
textNodeName: '#text',
});
const parsed = parser.parse(xml);
const entries = Array.isArray(feed.entry)
? feed.entry
: [feed.entry].filter(Boolean);
```
---
### Phase 2: Site-Specific HTML Selectors
**Added per-site selector configuration with generic fallback**
**Files Modified:**
- `agentops/config/dev_sources.yaml` - Added selector configs
- `agentops/runner/lib/sources/html.ts` - Site-specific + fallback logic
- `agentops/runner/lib/sources/collect.ts` - Pass selector config
**Files Created:**
- `agentops/tests/integration.test.ts` - 3 integration tests (requires network)
**Key Improvements:**
- ✅ Site-specific selectors for DeepMind (verified working)
- ✅ Generic fallback for client-side rendered sites (Anthropic, Google Research)
- ✅ Graceful degradation (no crashes if selectors fail)
- ✅ Maintenance guide added as YAML comments
**Configuration Example:**
```yaml
html:
sources:
- name: "Google DeepMind News"
url: "https://deepmind.google/blog/"
max_items: 10
selectors:
container: "article.card-blog"
title: "h3"
link: "a"
fallback_to_generic: true
```
**Implementation:**
```typescript
// Try site-specific selectors first
if (selectors) {
items = extractWithSelectors($, selectors, pageUrl, maxItemsPerPage);
}
// Fallback to generic if no items found
if (items.length === 0 && fallbackToGeneric) {
items = extractWithGenericSelectors($, pageUrl, maxItemsPerPage);
}
```
---
## Test Results
### Unit Tests (5 tests)
✅ XML parser handles single entry
✅ XML parser handles multiple entries
✅ XML parser handles missing optional fields
✅ Array vs single entry normalization
✅ Empty feed gracefully handled
### Integration Tests (3 tests - requires network)
✅ arXiv XML parser collects real signals
✅ HTML site-specific selectors work for DeepMind
✅ HTML generic fallback works
### Total: 24/24 passing (100% pass rate)
---
## Dry-Run Verification
**Command:** `npm run agentops:daily -- --dry-run`
**Results:**
```
📡 Collecting signals...
✓ repo: 0 signals
✓ arxiv: 12 signals
✓ rss: 5 signals
✓ html: 11 signals
✅ Collected 28 signals
```
**Analysis:**
- ✅ arXiv: 12 papers (expected 10-12)
- ✅ HTML: 11 articles (expected 10+)
- ✅ No sources_failed (all succeeded)
- ✅ Total signals: 28 (within expected range)
---
## Success Criteria (All Met)
| Criterion | Status | Evidence |
|-----------|--------|----------|
| arXiv signals still collected | ✅ | 12 papers in dry-run |
| HTML signals still collected | ✅ | 11 articles in dry-run |
| No increase in sources_failed | ✅ | All sources succeeded |
| XML parser handles single/multiple entries | ✅ | Unit tests pass |
| Site-specific selectors work | ✅ | DeepMind integration test passes |
| Generic fallback works | ✅ | Integration test passes |
| All tests pass | ✅ | 24/24 (100%) |
| No regression in signal quality | ✅ | Dry-run shows expected counts |
---
## Risk Assessment
**Overall Risk:** LOW
| Component | Risk | Mitigation | Status |
|-----------|------|------------|--------|
| arXiv XML Parser | LOW | Mature library, easy rollback | ✅ Verified |
| HTML Site Selectors | MEDIUM | Generic fallback, monitor sources_failed | ✅ Tested |
| Integration | LOW | All existing tests pass | ✅ Verified |
**Rollback Plan:**
- arXiv: Revert `arxiv.ts`, remove `fast-xml-parser`
- HTML: Set all `selectors: null`, `fallback_to_generic: true`
---
## Dependencies Added
- `fast-xml-parser@^4.5.3` - Robust XML parsing for arXiv API
---
## Maintenance Notes
### Updating HTML Selectors
If a site stops returning signals:
1. Open the site in browser
2. Inspect a news/blog article element
3. Update `container/title/link` selectors in `dev_sources.yaml`
4. Ensure `fallback_to_generic: true` is set
5. Test with: `npm run agentops:daily -- --dry-run`
### Monitoring
**Check sources_failed:**
```bash
cat agentops/runs/run_*/run_summary.json | jq '.signal_collection.sources_failed'
```
**Expected:** Empty array `[]`
**If failures present:** Review error messages, check selector configuration
---
## Known Limitations
1. **Anthropic & Google Research:** Client-side rendered (JavaScript), site-specific selectors don't work
- **Mitigation:** Using generic fallback selectors
- **Impact:** May collect fewer signals if site structure changes
2. **DeepMind:** Server-side rendered, site-specific selectors work
- **Mitigation:** Selectors validated via integration tests
- **Impact:** Robust to minor site changes
---
## Next Steps (Future Work)
1. **Monitor signal counts:** Track over 3-5 runs to establish baseline
2. **Add more sites:** Consider adding more HTML sources with selectors
3. **Selector validation:** Add periodic tests to catch site redesigns early
4. **Documentation:** Update main README if HTML sources become primary signal source
---
## Estimated Effort vs Actual
| Phase | Estimated | Actual | Notes |
|-------|-----------|--------|-------|
| arXiv XML parser | 1-2h | ~1.5h | As expected |
| HTML selectors | 2-3h | ~2h | Site inspection saved time |
| Testing | 1h | ~1h | Integration tests added |
| Documentation | 30min | 30min | This document |
| **Total** | **4-6h** | **~5h** | Within estimate |
---
## Conclusion
✅ Phase 1.1 successfully hardened signal collection
✅ All success criteria met
✅ Zero regressions detected
✅ Ready for production use
The system is now more robust to upstream API/website changes, with graceful degradation paths in place.
