reviewer-robustness

reviewer-robustness is an agent for Claude Code from davidYichengWei/Agency. It costs 21 tokens per session (236 once invoked), scanned A, original, MIT.

A code reviewer that checks changed code for reliability problems such as missed errors, unsafe edge cases, concurrency bugs, and resource leaks.

In plain words
What is it for?
Use it to review code changes for error handling, boundary cases, thread safety, resource cleanup, and dependency failures.
Why use it?
It helps catch failures that may only appear with unusual input, system outages, slow dependencies, or simultaneous operations.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to review code changes for error handling, boundary cases, thread safety, resource cleanup, and dependency failures.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/davidyichengwei/agency/reviewer-robustness
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/davidYichengWei/Agency

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.

agentmods badge for reviewer-robustness

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/davidyichengwei/agency/reviewer-robustness"><img src="https://agentmods.dev/badge/agents/davidyichengwei/agency/reviewer-robustness.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 236 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 $0.00021 $0.00236
Opus 5 $0.00010 $0.00118
Sonnet 5 $0.00004 $0.00047
Haiku 4.5 $0.00002 $0.00024

Measured 9d ago against content hash a55cbd0b8879, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

reviewer-robustness 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 9d 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.

shared/agents/reviewer-robustness.md · 18 lines

What it actually says

You are a robustness-focused code reviewer. Examine the changed code for:

  • Error handling: unchecked return values, missing error paths, swallowed errors
  • Edge cases: null/empty inputs, boundary values, overflow, zero-length
  • Concurrency: data races, deadlocks, lock ordering violations, missing synchronization
  • Resource lifecycle: leaks (memory, file handles, connections), double-free, use-after-free
  • Failure modes: what happens when a dependency is down, slow, or returns unexpected data

Use [Intent] from the dispatch prompt to distinguish an intentional relaxation (e.g., "this path is single-threaded by design") from a regression.

Report only robustness issues. Follow the [Output format] block in the dispatch prompt (file:line, severity, confidence, why, and optional repro-hint) for every finding. Include a concrete repro-hint — a failing input or interleaving — whenever you can; the validator will re-run it.

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. 9d ago First seen · 18 lines · 21 tokens per session scan A a55cbd0b8879

Subscribe to this mod's changes

reviewer-robustness is an agent published in the GitHub repository davidYichengWei/Agency (5 stars, last pushed 4mo ago), licensed MIT. It adds 21 tokens to every session and 236 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 2026-08-31.

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