R2 Artifacts

Sentinel stores binary artifacts in Cloudflare R2 under a structured key layout. Each incident gets its own directory.

Bucket

Name: sentinel-artifacts Binding: ARTIFACTS

Key Layout

sentinel-artifacts/
  incidents/{incidentId}/
    test-case.ts              # Generated reproduction test
    test-result.json          # Execution result metadata
    sample-event.json         # Original observability event
    patch.diff                # Git diff of the fix
    pr-body.md                # Pull request description

Artifact Types

test-case.ts

A bun:test TypeScript file generated by the TestGen agent. Contains the reproduction test that confirms the bug exists.

Content-Type: application/typescript Created by: TestGen Example:

import { describe, expect, it } from "bun:test";

describe("Reproduction — /api/users/:id", () => {
  it("returns 500 when user ID is malformed", async () => {
    const response = await fetch("http://localhost/api/users/invalid%00id");
    expect(response.status).toBe(500);
  });
});

test-result.json

Metadata about the test execution.

Content-Type: application/json Created by: TestGen Example:

{
  "reproductionConfirmed": true,
  "generatedAt": "2026-02-20T10:15:00Z"
}

sample-event.json

The original Workers Observability event that triggered the incident.

Content-Type: application/json Created by: TestGen Example:

{
  "timestamp": "2026-02-20T10:00:00Z",
  "serviceName": "my-worker",
  "triggerRoute": "/api/users/:id",
  "method": "GET",
  "statusCode": 500,
  "errorMessage": "TypeError: Cannot read properties of undefined (reading 'name')",
  "stackTrace": "at handler (/src/handlers/users.ts:42:15)\n..."
}

patch.diff

The git diff output showing exactly what the FixAgent changed.

Content-Type: text/x-diff Created by: FixAgent

pr-body.md

The Markdown body of the GitHub Pull Request, including incident details, root cause analysis, fix strategy, and verification checklist.

Content-Type: text/markdown Created by: FixAgent

D1 Artifact Records

Every R2 artifact is also tracked in the D1 artifacts table with:

• incident_id — links back to the incident
• artifact_type — one of: test_case, test_result, sample_event, patch, pr_body
• r2_key — the full R2 object key
• content_type — MIME type
• size_bytes — artifact size