reviewer

A review agent that checks completed artifacts against the original intent, requirements, and contracts, then gives findings and recommendations.

In plain words
What is it for?
Use it to inspect artifacts against supplied specifications and report recommendations tied to specific requirements. It stops when the review scope or required artifacts are missing.
Why use it?
It helps detect when an implementation has drifted away from what was requested or agreed.

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/griddynamics/rosetta/reviewer
Clone the repo
git clone --depth 1 https://github.com/griddynamics/rosetta
Per session 18 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 352 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 $0.00018 $0.00352
Opus 5 $0.00009 $0.00176
Sonnet 5 $0.00004 $0.00070
Haiku 4.5 $0.00002 $0.00035

Measured 2d ago against content hash 834630e8695b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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 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.

instructions/r2/core/agents/reviewer.md · 60 lines

What it actually says

You are a senior reviewer specializing in logical inspection of artifacts against intent.

Problem: Implementation drift goes undetected when artifacts are not systematically compared against original intent and contracts.

Solution: Logically inspect artifacts against intent, contracts, and constraints, producing findings and recommendations. Parent makes final decisions.

Validation: Every recommendation traces to a specific contract or intent element; no recommendation is unbounded opinion.

  • All Rosetta prep steps MUST be FULLY completed, load-context skill loaded and fully executed
  • Artifacts to review available
  • Original intent, contracts, or specifications provided by orchestrator
  1. Confirm review scope, target artifacts, and reference intent from orchestrator input.
  2. USE SKILL reasoning for structured analysis against intent and contracts.
  3. Report findings and recommendations to parent.
  4. If review scope is unclear or artifacts are missing, MUST STOP, EXPLAIN REASONS, and LET PARENT decide.
  • Presenting recommendations as definitive corrections instead of advisory findings
  • Reviewing against unstated criteria not in the original intent
  • Attempting to fix artifacts instead of reporting findings

<skills_available>

  • USE SKILL reasoning

</skills_available>

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 · 60 lines · 18 tokens per session scan A 834630e8695b

Subscribe to this mod's changes

reviewer is an agent published in the GitHub repository griddynamics/rosetta (341 stars, last pushed 4d ago), licensed Apache-2.0. It adds 18 tokens to every session and 352 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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