# Send Evidence URL Verifier to your agent
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
## Fast path
- Download the package from Yavira.
- Extract it into a folder your agent can access.
- Paste one of the prompts below and point your agent at the extracted folder.
## Suggested prompts
### New install

```text
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete.
```
### Upgrade existing

```text
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run.
```
## Machine-readable fields
```json
{
  "schemaVersion": "1.0",
  "item": {
    "slug": "evidence-url-verifier",
    "name": "Evidence URL Verifier",
    "source": "tencent",
    "type": "skill",
    "category": "开发工具",
    "sourceUrl": "https://clawhub.ai/Dalomeve/evidence-url-verifier",
    "canonicalUrl": "https://clawhub.ai/Dalomeve/evidence-url-verifier",
    "targetPlatform": "OpenClaw"
  },
  "install": {
    "downloadUrl": "/downloads/evidence-url-verifier",
    "sourceDownloadUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=evidence-url-verifier",
    "sourcePlatform": "tencent",
    "targetPlatform": "OpenClaw",
    "packageFormat": "ZIP package",
    "primaryDoc": "SKILL.md",
    "includedAssets": [
      "SKILL.md"
    ],
    "downloadMode": "redirect",
    "sourceHealth": {
      "source": "tencent",
      "slug": "evidence-url-verifier",
      "status": "healthy",
      "reason": "direct_download_ok",
      "recommendedAction": "download",
      "checkedAt": "2026-05-03T00:53:30.358Z",
      "expiresAt": "2026-05-10T00:53:30.358Z",
      "httpStatus": 200,
      "finalUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=evidence-url-verifier",
      "contentType": "application/zip",
      "probeMethod": "head",
      "details": {
        "probeUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=evidence-url-verifier",
        "contentDisposition": "attachment; filename=\"evidence-url-verifier-1.0.0.zip\"",
        "redirectLocation": null,
        "bodySnippet": null,
        "slug": "evidence-url-verifier"
      },
      "scope": "item",
      "summary": "Item download looks usable.",
      "detail": "Yavira can redirect you to the upstream package for this item.",
      "primaryActionLabel": "Download for OpenClaw",
      "primaryActionHref": "/downloads/evidence-url-verifier"
    },
    "validation": {
      "installChecklist": [
        "Use the Yavira download entry.",
        "Review SKILL.md after the package is downloaded.",
        "Confirm the extracted package contains the expected setup assets."
      ],
      "postInstallChecks": [
        "Confirm the extracted package includes the expected docs or setup files.",
        "Validate the skill or prompts are available in your target agent workspace.",
        "Capture any manual follow-up steps the agent could not complete."
      ]
    }
  },
  "links": {
    "detailUrl": "https://openagent3.xyz/skills/evidence-url-verifier",
    "downloadUrl": "https://openagent3.xyz/downloads/evidence-url-verifier",
    "agentUrl": "https://openagent3.xyz/skills/evidence-url-verifier/agent",
    "manifestUrl": "https://openagent3.xyz/skills/evidence-url-verifier/agent.json",
    "briefUrl": "https://openagent3.xyz/skills/evidence-url-verifier/agent.md"
  }
}
```
## Documentation

### Evidence URL Verifier

Verify evidence URLs are real and accessible.

### Problem

Evidence links often:

Point to non-existent resources
Are placeholders (example.com)
Expire or get deleted
Don't match claimed content

### 1. URL Validation

function Test-EvidenceUrl {
    param([string]$url)
    
    try {
        $response = Invoke-WebRequest -Uri $url -Method Head -TimeoutSec 10
        return @{
            Valid = $true
            Status = $response.StatusCode
            ContentType = $response.ContentType
        }
    } catch {
        return @{
            Valid = $false
            Error = $_.Exception.Message
        }
    }
}

# Usage
$result = Test-EvidenceUrl "https://example.com/artifact"
if ($result.Valid) {
    Write-Host "URL valid: $($result.Status)"
} else {
    Write-Error "URL invalid: $($result.Error)"
}

### 2. Content Verification

# Check URL matches claimed content type
$response = Invoke-WebRequest -Uri $url
if ($response.ContentType -notlike "text/*" -and $expectedType -eq "text") {
    Write-Warning "Content type mismatch"
}

# Check for placeholder text
$content = $response.Content
if ($content -match "lorem ipsum|placeholder|example") {
    Write-Warning "Content appears to be placeholder"
}

### 3. Artifact Existence

# For local paths
if (Test-Path $artifactPath) {
    $size = (Get-Item $artifactPath).Length
    if ($size -eq 0) {
        Write-Warning "Artifact file is empty"
    }
} else {
    Write-Error "Artifact not found: $artifactPath"
}

### Executable Completion Criteria

CriteriaVerificationURL resolvesHTTP 200 responseContent matchesType matches expectedNo placeholdersContent is substantiveLocal paths existTest-Path returns true

### Privacy/Safety

Don't log full URL contents
Redact sensitive data in responses
Respect rate limits (max 1 req/sec)

### Self-Use Trigger

Use when:

Task claims evidence artifact
URL provided as proof
Before marking task complete
Audit of past completions

Verify evidence. Trust but confirm.
## Trust
- Source: tencent
- Verification: Indexed source record
- Publisher: Dalomeve
- Version: 1.0.0
## Source health
- Status: healthy
- Item download looks usable.
- Yavira can redirect you to the upstream package for this item.
- Health scope: item
- Reason: direct_download_ok
- Checked at: 2026-05-03T00:53:30.358Z
- Expires at: 2026-05-10T00:53:30.358Z
- Recommended action: Download for OpenClaw
## Links
- [Detail page](https://openagent3.xyz/skills/evidence-url-verifier)
- [Send to Agent page](https://openagent3.xyz/skills/evidence-url-verifier/agent)
- [JSON manifest](https://openagent3.xyz/skills/evidence-url-verifier/agent.json)
- [Markdown brief](https://openagent3.xyz/skills/evidence-url-verifier/agent.md)
- [Download page](https://openagent3.xyz/downloads/evidence-url-verifier)