agent-reliability

agent-reliability is a skill for Claude Code from vikast908/agent-repo-card. It costs 102 tokens per session (1,250 once invoked), scanned A, original, MIT.

A review of whether an AI agent can keep working correctly when tools fail, inputs are difficult, or a run is interrupted. It examines the agent loop, stopping rules, retries, timeouts, state, safeguards, and monitoring.

In plain words
What is it for?
Use it to assess tool-error handling, retry and backoff behavior, idempotency, rate limits, resumability, graceful degradation, determinism, and tracing before production use.
Why use it?
It exposes failure modes such as endless loops, lost progress, unsafe retries, hidden errors, uncontrolled costs, and behavior that works only in ideal conditions.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it to assess tool-error handling, retry and backoff behavior, idempotency, rate limits, resumability, graceful degradation, determinism, and tracing before production use.

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Install with agentmods
npx agentmods add skills/vikast908/agent-repo-card/agent-reliability
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.

Any agent
npx skills add vikast908/agent-repo-card --skill agent-reliability
Clone the repo
git clone --depth 1 https://github.com/vikast908/agent-repo-card

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 agent-reliability

README.md
[![agentmods](https://agentmods.dev/badge/skills/vikast908/agent-repo-card/agent-reliability/github.svg)](https://agentmods.dev/skills/vikast908/agent-repo-card/agent-reliability)
Your own site
<a href="https://agentmods.dev/skills/vikast908/agent-repo-card/agent-reliability"><img src="https://agentmods.dev/badge/skills/vikast908/agent-repo-card/agent-reliability/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 agent-reliability

Your own site · 80×15
<a href="https://agentmods.dev/skills/vikast908/agent-repo-card/agent-reliability"><img src="https://agentmods.dev/badge/skills/vikast908/agent-repo-card/agent-reliability.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 102 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,250 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 $0.00102 $0.01250
Opus 5 $0.00051 $0.00625
Sonnet 5 $0.00020 $0.00250
Haiku 4.5 $0.00010 $0.00125

Measured 9d ago against content hash 7a229ce2cee0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

agent-reliability 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.

skills/agent-reliability/SKILL.md · 65 lines

How it starts

The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent reliability & architecture review

You are a senior engineer who has shipped LLM agents to production and seen how they fail: infinite loops, swallowed tool errors, non-idempotent retries, unbounded cost, lost state mid-run, and silent wrong answers. You review this repo's agent for whether it will hold up under real inputs, real failures, and real scale — not just on the happy-path demo.

Protocol (shared across all checks)

  1. Plan first (default). Present a short plan: the agent components you'll inspect, the failure modes you'll probe, the outputs, and assumptions/missing info. Ask "Proceed with the full reliability review, or adjust scope?" and wait. Skip if invoked with auto / "just do it".
  2. Evidence rule. Cite file:line. Quote ≤2 lines. Never invent control flow; trace the actual loop. Label guesses unverified.
  3. Severity: Critical / High / Medium / Low.
  4. Score dimensions below to 0–100 → grade.
  5. Output inline, then offer to save to agent-review/agent-reliability.md.

What to inspect

  • The agent loop: find the main control loop (while, for, recursion) that drives model→tool→model. Identify the termination condition, max-steps/iteration cap, and what happens when it's hit.
  • Tool execution: how tool calls are dispatched, validated, and their results handled. Search: tool, function_call/tool_call, execute, dispatch, handler.
  • Error handling: try/catch/except, what happens on a tool error or a model error — is the error fed back to the model, retried, surfaced, or swallowed? Search: catch, except, retry, backoff, timeout.
  • Idempotency & side effects: do retried tool calls double-write / double-charge / double-send? Search for writes, payments, emails, posts inside retry paths.
  • Timeouts & limits: per-call timeouts, total-run budget (steps, tokens, wall-clock, $), concurrency caps, rate-limit handling (429s).
  • State & resumability: is run state persisted? Can a crashed/cancelled run resume, or does it restart and repeat side effects? Search: state, checkpoint, resume, persist, session.
  • Guardrails: input validation, output validation/schema enforcement, confirmation before consequential actions, allow/deny lists for tools.
  • Observability: logging, tracing, span/run IDs, token/cost tracking, ability to reconstruct why a run did what it did.

Read the full file on GitHub · 65 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. 9d ago First seen · 65 lines · 102 tokens per session scan A 7a229ce2cee0

Subscribe to this mod's changes

agent-reliability is a skill published in the GitHub repository vikast908/agent-repo-card (1 stars, last pushed 2mo ago), licensed MIT. It adds 102 tokens to every session and 1,250 once invoked, about $0.0005 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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