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.
npx agentmods add skills/notforyou23/home23/source-validationnpx skills add notforyou23/home23 --skill source-validationgit clone --depth 1 https://github.com/notforyou23/home23Wrote 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.
[](https://agentmods.dev/skills/notforyou23/home23/source-validation)<a href="https://agentmods.dev/skills/notforyou23/home23/source-validation"><img src="https://agentmods.dev/badge/skills/notforyou23/home23/source-validation.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00024 | $0.00362 |
| Opus 5 | $0.00012 | $0.00181 |
| Sonnet 5 | $0.00005 | $0.00072 |
| Haiku 4.5 | $0.00002 | $0.00036 |
Grade A, and why
Source Validation 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 4d 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.
What it actually says
Source Validation
Use this skill before you promote a claim to fact.
When to use
Use source-validation for:
- checking whether a source is primary or derivative
- validating recency-sensitive claims
- spotting bias, missing provenance, or circular citation
- comparing multiple sources on the same claim
Workflow
- Identify the claim being validated.
- Find the closest primary source available.
- Check date, authorship, and provenance.
- Look for disagreement or unsupported jumps in secondary summaries.
- Rate confidence and explain why.
Output
- Claim
- Best supporting source
- Source type: primary, secondary, tertiary
- Risks or bias
- Confidence
Gotchas
- Popularity is not evidence.
- A recent article can still be derivative and weak.
- If the claim is unsettled, report the uncertainty instead of forcing a verdict.
Examples
Validate this claim before we cite it:
"Company X signed the deal on April 12."
Prefer the primary filing or official announcement over commentary.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 4d ago First seen · 68 lines · 24 tokens per session scan A d430e71cf107
Source Validation is a skill published in the GitHub repository notforyou23/home23 (11 stars, last pushed today), licensed MIT. It adds 24 tokens to every session and 362 once invoked, about $0.0001 per session on Opus 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 2026-08-30.
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