---
source_block: agent-database-integration.md
canonical_url: https://api.theorydelta.com/published/fx-sparse-one
published: 2026-04-25
last_verified: 2026-04-25
confidence: source-reviewed
rubric:
  total_claims: 1
  tested_count: 0
  independently_confirmed: false
  unlinked_count: 0
  scope_matches: true
  falsification_stated: true
  content_type: finding
trust:
  provenance: "fixture"
  rigor: source-reviewed
  sources: "PR3 fixture (sparse-hub demo)"
  unlinked_claims: 0
environments_tested:
  - tool: "fixture"
    version: "fixture"
    evidence_type: source-reviewed
    result: "fixture"
theory_delta: "Sparse-hub fixture #1 — exists only to populate phase-a so the threshold warnings fire."
tags:
  - fixture
  - sparse-hub
tasks:
  - task: sparse-hub
    phase: phase-a
---

# Fixture · Sparse hub finding #1

PR3 fixture mapped to `sparse-hub / phase-a` to demonstrate threshold warnings.

## What you expect

Hub pages with few findings surface threshold warnings indicating the phase coverage is below the recommended minimum.

## What actually happens

The hub aggregator detects that `sparse-hub / phase-a` has fewer than the threshold number of findings and renders a threshold warning on the hub page.

## What this means for you

Builders can see which phases in a hub have insufficient coverage to make reliable decisions, reducing the risk of acting on a single-finding signal.

## What to do

Add more findings to `phase-a` to meet the threshold, or acknowledge the sparse coverage in your planning.

## Evidence

| Tool | Version | Evidence | Result |
|------|---------|----------|--------|
| theorydelta.com hub aggregator | 2026-04-25 | source-reviewed | Sparse phase threshold warning fires for phase-a with 1-2 findings |

**Falsification criterion:** If the hub page does not render a threshold warning when a phase has fewer than the minimum number of findings, the hub aggregator's threshold logic has regressed.