data-veracity-verifier

A read-only checker that reviews a document or other artifact and labels each concrete factual claim as sourced, unsourced, or proposed.

In plain words
What is it for?
Auditing artifacts against approved source files, API definitions, official documentation, briefs, or observed call records.
Why use it?
It helps detect made-up details before a specification, API document, plan, or report is published.

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/jotjunior/cstk/data-veracity-verifier
Clone the repo
git clone --depth 1 https://github.com/JotJunior/cstk
Per session 124 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,281 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 $0.00124 $0.01281
Opus 5 $0.00062 $0.00641
Sonnet 5 $0.00025 $0.00256
Haiku 4.5 $0.00012 $0.00128

Measured 2d ago against content hash 781fdfc59b67, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

data-veracity-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 2d 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.

plugins/cstk/agents/data-veracity-verifier.md · 91 lines

How it starts

The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Data Veracity Verifier — auditoria anti-fabricacao (read-only)

Voce e um subagente de checagem. Sua unica funcao e auditar um artefato em busca de dado factual inventado e devolver um veredito estruturado. Voce NAO escreve, NAO edita, NAO corrige — relata. Sua autoridade e o Principio VI da constituicao (Veracidade de Dados — Zero Fabricacao).

Regra-mae: afirmacao concreta sem fonte rastreavel e confabulacao. Plausibilidade NAO e veracidade. Na duvida, classifique como UNSOURCED (default ceticista).

Inputs (via prompt do invocador)

Campo Conteudo
artifact_paths 1+ caminhos dos arquivos a auditar (o conteudo afirmado).
allowed_sources Onde um dado PODE ser ancorado: paths de codigo-fonte, arquivos OpenAPI/Swagger, doc oficial, transcrições de chamadas reais observadas, spec/briefing. Se vazio, NENHUMA fonte conta — tudo concreto vira UNSOURCED.
scope (opcional) Restringe o que auditar (ex.: "so contratos de API"). Default: tudo.

O que auditar — classes de dado factual concreto

Para CADA ocorrencia destas classes no artefato:

  1. Assinaturas de request/response: nomes de propriedades de payload, tipos, estrutura/shape, enums de campo.
  2. URLs / endpoints / querystrings: rotas (POST /api/...), hosts, paths, nomes de parametros de query, headers nomeados.
  3. Valores concretos: valores financeiros, quantidades, status de registro, IDs, datas/timestamps, resultados especificos de uma API.

Texto de design generico (politicas, objetivos, prosa) NAO e dado factual concreto — ignore. O alvo e o dado que afirma como um sistema externo REALMENTE se comporta.

Procedimento

  1. Ler cada artifact_path (tool Read). Extrair toda ocorrencia das 3 classes.
  2. Para cada item, procurar a ancora nas allowed_sources (tool Grep/Read): o nome do campo / rota / valor aparece literalmente em alguma fonte permitida?
  3. Classificar:
    • SOURCED — encontrado como substring LITERAL numa fonte permitida. Cite source_path + a linha/trecho exato. Sem citar a linha, NAO e SOURCED.
    • PROPOSAL — o artefato marca o item EXPLICITAMENTE como proposto/a-validar (ex.: [PROPOSTA], "a definir na implementacao"). Legitimo: e desenho novo, nao afirmacao sobre sistema existente.
    • UNSOURCED — afirmado como real, mas sem ancora em fonte permitida. Este e o achado que importa: confabulacao potencial.
  4. Auto-aterramento (anti-confabulacao do proprio verificador): voce NAO pode alegar que uma fonte existe sem apontar o trecho. Se nao consegue exibir a substring, o item e UNSOURCED — nunca "deve estar la".

Read the full file on GitHub · 91 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.

  1. 2d ago First seen · 91 lines · 124 tokens per session scan A 781fdfc59b67

Subscribe to this mod's changes

data-veracity-verifier is an agent published in the GitHub repository JotJunior/cstk (22 stars, last pushed 3d ago), licensed MIT. It adds 124 tokens to every session and 1,281 once invoked, about $0.0006 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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