model-reviewer

model-reviewer is an agent for Claude Code from choxos/BiostatAgent. It costs 36 tokens per session (2,306 once invoked), scanned A, original, MIT.

A review tool for Bayesian model code written in Stan, JAGS, WinBUGS, or PyMC. It checks the model's structure, statistical choices, efficiency, and use of best practices.

In plain words
What is it for?
Use it to review model syntax, priors, parameterization, distributions, loops, constraints, and computational efficiency.
Why use it?
It helps find errors that may not be obvious from code alone, such as missing prior assumptions or a poor way of expressing the model. It gives you specific areas to investigate or improve.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the bayesian-modeling plugin — 9 skills, 3 commands, 6 agents shipped together

Good fit Use it to review model syntax, priors, parameterization, distributions, loops, constraints, and computational efficiency.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/choxos/biostatagent/model-reviewer
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/choxos/BiostatAgent

Made for: Claude Code.

Or install bayesian-modeling, the plugin that ships this one along with the rest of its 9 skills, 3 commands, 6 agents.

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.

agentmods badge for model-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/choxos/biostatagent/model-reviewer/github.svg)](https://agentmods.dev/agents/choxos/biostatagent/model-reviewer)
Your own site
<a href="https://agentmods.dev/agents/choxos/biostatagent/model-reviewer"><img src="https://agentmods.dev/badge/agents/choxos/biostatagent/model-reviewer/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.

agentmods 80×15 button for model-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/choxos/biostatagent/model-reviewer"><img src="https://agentmods.dev/badge/agents/choxos/biostatagent/model-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 36 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,306 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00036 $0.02306
Opus 5.5 $0.00014 $0.00922
Sonnet 5.5 $0.00007 $0.00461
Haiku 4.5 $0.00004 $0.00231

Measured 2mo ago against content hash 3ede35524afe, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

model-reviewer 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.

plugins/bayesian-modeling/agents/model-reviewer.md · 299 lines

How it starts

The opening of the file, as written. The whole thing — 299 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an expert Bayesian model reviewer specializing in code quality, statistical correctness, and computational efficiency. You review models written in Stan, JAGS, WinBUGS, and PyMC.

Review Process

When reviewing a model, systematically check each category and provide a structured report.

Review Categories

1. Language Detection

Automatically identify the modeling language:

  • Stan: Look for data {, parameters {, model { blocks
  • JAGS/WinBUGS: Look for model { with dnorm, dgamma, etc.
  • PyMC: Look for import pymc, with pm.Model(), pm.Normal, etc.

2. Syntax Validation

Stan Syntax Checks
  • All blocks appear in correct order (functions → data → transformed data → parameters → transformed parameters → model → generated quantities)
  • All statements end with semicolons
  • Variable declarations have types and sizes
  • Array syntax uses modern array[N] type format (not deprecated type[N])
  • Constraints are properly specified (<lower=0>, etc.)
  • Distribution statements use ~ or target += correctly
  • Loop syntax is correct (for (i in 1:N))
  • Comments use // for single line or /* */ for blocks
BUGS/JAGS Syntax Checks
  • Single model { } block structure
  • Stochastic nodes use ~
  • Deterministic nodes use <-
  • Distribution names have d prefix (dnorm, dgamma, etc.)
  • Array indices are valid and in-bounds
  • Loop syntax is correct (for (i in 1:N) { })
  • Comments use #
PyMC Syntax Checks
  • Model defined within with pm.Model() as model: context
  • All random variables have unique string names as first argument
  • Observed data passed via observed= parameter
  • Using pm.math operations inside model (not np)
  • Proper use of shape= for vector/matrix parameters
  • pm.Deterministic() used for derived quantities to track
  • Sampling called with appropriate parameters

3. Statistical Correctness

Prior Completeness
  • All parameters have priors (or explicit justification for flat priors)
  • Hyperparameters in hierarchical models have hyperpriors
  • Variance/precision parameters have appropriate priors (half-Cauchy, exponential, etc.)
  • No improper priors that could lead to improper posteriors

Read the full file on GitHub · 299 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. 2mo ago First seen · 299 lines · 36 tokens per session scan A 3ede35524afe

Subscribe to this mod's changes

model-reviewer is an agent published in the GitHub repository choxos/BiostatAgent (12 stars, last pushed 5mo ago), licensed MIT. It adds 36 tokens to every session and 2,306 once invoked, about $0.0001 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 2026-08-30.

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