silent-failure-hunter

silent-failure-hunter is an agent for Claude Code from pandysp/claude-plugins. It costs 54 tokens per session (119 once invoked), scanned A, original, MIT.

A code-review agent that looks for hidden failures, weak error handling, and inappropriate fallback behavior.

In plain words
What is it for?
It is for reviewing code changes that touch error handling, catch blocks, fallback logic, or error suppression.
Why use it?
It helps expose problems that may otherwise suppress errors or leave users without useful feedback.

Agent for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: model in frontmatter.

Installs and runs on its own, but its text points at files inside its plugin — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed. Installing the plugin gets both.

Part of the silent-failures plugin — 1 skill, 1 agent shipped together

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/pandysp/claude-plugins/silent-failure-hunter
Clone the repo
git clone --depth 1 https://github.com/pandysp/claude-plugins

Made for: Claude Code.

Or install silent-failures, the plugin that ships this one along with the rest of its 1 skill, 1 agent.

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 silent-failure-hunter

README.md
[![agentmods](https://agentmods.dev/badge/agents/pandysp/claude-plugins/silent-failure-hunter.svg)](https://agentmods.dev/agents/pandysp/claude-plugins/silent-failure-hunter)
Your own site
<a href="https://agentmods.dev/agents/pandysp/claude-plugins/silent-failure-hunter"><img src="https://agentmods.dev/badge/agents/pandysp/claude-plugins/silent-failure-hunter.svg" alt="Measured on agentmods" height="20"></a>
Per session 54 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 119 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 5.1 $0.00054 $0.00119
Opus 5 $0.00027 $0.00060
Sonnet 5 $0.00011 $0.00024
Haiku 4.5 $0.00005 $0.00012

Measured 5d ago against content hash c559238fe3a3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

silent-failure-hunter 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 5d 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/silent-failures/agents/silent-failure-hunter.md · 9 lines

What it actually says

Read ${CLAUDE_PLUGIN_ROOT}/skills/silent-failures/SKILL.md completely, then apply only its Hunter methodology section to the task you were given. That section is canonical; do not substitute or recreate it from memory.

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. 5d ago First seen · 9 lines · 54 tokens per session scan A c559238fe3a3

Subscribe to this mod's changes

silent-failure-hunter is an agent published in the GitHub repository pandysp/claude-plugins (5 stars, last pushed 14d ago), licensed MIT. It adds 54 tokens to every session and 119 once invoked, about $0.0003 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.