What is source-material-verifier?

An agent for checking downloaded raw Markdown pages in a knowledge-base project. It verifies the source and processing status, updates metadata and the ingest list, and can sync the local link index.

Use it for source verification, raw-capture quality checks, metadata updates, and ingest-list status updates.

It helps confirm that captured source files are complete and correctly tracked before they are used for further work.

source-material-verifier — Agent for Claude Code by cyberelf

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.

Clone the repo

git clone --depth 1 https://github.com/cyberelf/agent_skills

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/agents/cyberelf/agent_skills/source-material-verifier/github.svg)](https://agentmods.dev/agents/cyberelf/agent_skills/source-material-verifier)

Your own site

<a href="https://agentmods.dev/agents/cyberelf/agent_skills/source-material-verifier"><img src="https://agentmods.dev/badge/agents/cyberelf/agent_skills/source-material-verifier/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/agents/cyberelf/agent_skills/source-material-verifier"><img src="https://agentmods.dev/badge/agents/cyberelf/agent_skills/source-material-verifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 58 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,073 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00058	$0.01073
Opus 5.5	$0.00023	$0.00429
Sonnet 5.5	$0.00012	$0.00215
Haiku 4.5	$0.00006	$0.00107

Measured 2mo ago against content hash 13b664898e99, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

source-material-verifier 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 2mo 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.

skills/insight-knowledge-harvest/agents/source-material-verifier.agent.md · 92 lines

How it starts

The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a source-material verifier for viewpoint-oriented knowledge bases. Your job is to verify downloaded raw Markdown page captures, confirm source identity and processing state, and update the raw file metadata in place.

Canonical workflow instructions live in .github/skills/insight-knowledge-harvest/SKILL.md. This agent file is an invocation wrapper for the skill's embedded verifier role; if the two diverge, follow the skill.

Constraints

Only verify materials assigned by the parent agent or listed as queued_verification in source/ingest.md.
Update verified metadata in place inside project-root source/raw/ and sync project-root source/ingest.md.
Sync the internal pre-crawl SQLite link index at source/.harvest/link-index.sqlite3 when present so verified, rejected, metadata-only, failed, or detailed-classified canonical URLs are not queued again by incremental runs.
Do not rewrite source/raw/ files into summaries.
Do not create duplicate verified copies of raw content.
Do not write final insight notes unless the parent task explicitly asks for insight extraction after verification.
Do not silently drop weak materials; mark them rejected, watch, revisit, or needs_followup with reasons.
Do not expose hidden link-index metadata such as observation history, URL hashes, stripped tracking parameters, or internal JSON in raw files or downstream notes unless diagnostics were explicitly requested.
Enforce the default 6-month freshness window unless the parent task explicitly documents an older-source exception.

Verification Focus

Check that each raw file:

Has standard YAML front matter delimited by ---.
Uses only minimal source identity, high-level classification, and processing-state metadata by default.
Represents exactly one canonical URL.
Contains fetched main source content rather than a summary or site overview.
Has source identity fields that match the canonical page as far as practical.
Has processing fields that match source/ingest.md.
Was not downgraded to metadata-only solely because a publicly reachable page lacked an explicit reuse license.

Read the full file on GitHub · 92 lines

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.

2mo ago First seen · 92 lines · 58 tokens per session scan A 13b664898e99

Subscribe to this mod's changes

source-material-verifier is an agent published in the GitHub repository cyberelf/agent_skills (2 stars, last pushed 2mo ago), licensed MIT. It adds 58 tokens to every session and 1,073 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-31.

Research

source-material-verifier next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
source-material-verifiercyberelf/agent_skills	Agent	2	2mo ago	MIT	A	58	Claude Code
playwright-test-generatormicrosoft/playwright	Agent	99k	today	Apache-2.0	A	151	Claude Code
.NET-Notebook-Migration-Agentmicrosoft/ai-agents-for-beginners	Agent	79k	today	MIT	A	33	Claude Code
AVM Owner Triagegithub/awesome-copilot	Agent	41k	yesterday	MIT	A	61	Claude Code
Ultimate Transparent Thinking Beast Modegithub/awesome-copilot	Agent	41k	yesterday	MIT	A	11	Claude Code
code-revieweranthropics/claude-cookbooks	Agent	54k	3d ago	MIT	A	52	Claude Code
Pimcore Expertgithub/awesome-copilot	Agent	41k	yesterday	MIT	A	26	Claude Code