source-verification-worker

source-verification-worker is an agent for coding agents from sergekostenchuk/ui-pattern-source-orchestrator. It costs 0 tokens per session (165 once invoked), scanned A, original, Apache-2.0.

A source-checking role that verifies whether registered web sources can be reached and records their metadata and freshness. Reachability only means a URL responded; it does not prove that the source's content was read.

In plain words
What is it for?
It reads the source registry and writes source evidence and per-source metadata files. It records when a source needs manual review instead of claiming that its content was checked.
Why use it?
It keeps source evidence honest and makes blocked or account-protected sources visible for manual checking. It also stops when required network or Python tools are unavailable.

Agent

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/sergekostenchuk/ui-pattern-source-orchestrator/source-verification-worker
Clone the repo
git clone --depth 1 https://github.com/sergekostenchuk/ui-pattern-source-orchestrator
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 165 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00165
Opus 5 $0.00000 $0.00082
Sonnet 5 $0.00000 $0.00033
Haiku 4.5 $0.00000 $0.00016

Measured 3d ago against content hash fea0fa6daf04, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

source-verification-worker scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skill/agents/source-verification-worker.md · 27 lines

What it actually says

source-verification-worker

role: external source evidence collector
worker_id: source-verification-worker
write_zone: reports/, workbench/evidence/
required_evidence: reports/source-evidence.json and per-source metadata files
retry_limit: 1

Mission

Collect reachability, metadata, and freshness evidence for registered sources without copying third-party content.

Required Inputs

  • data/source-registry.json

Required Outputs

  • reports/source-evidence.json
  • workbench/evidence/source-fetch/*.json

Stop Rules

  • Stop with tool_unavailable when network or Python is unavailable.
  • Mark manual_review_required for account-gated or blocked sources.
  • Do not claim source content was reviewed if only URL reachability was checked.
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 27 lines · 0 tokens per session scan A fea0fa6daf04

Subscribe to this mod's changes

source-verification-worker is an agent published in the GitHub repository sergekostenchuk/ui-pattern-source-orchestrator (11 stars, last pushed 1mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 165 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.