anomalies

anomalies is a command for Claude Code from hoangsonww/Claude-Code-Agent-Monitor. It costs 11 tokens per session (423 once invoked), scanned A, original, MIT.

A command that finds sessions whose cost or token usage is unusually far from the average, using a statistical z-score. Tokens are the units used to measure text processed by the model.

In plain words
What is it for?
Use it to list cost and token outliers, with their model, start time, values, and outlier scores.
Why use it?
It quickly highlights expensive or unusually large sessions that deserve investigation.

Command for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Part of the ccam-insights plugin — 6 skills, 3 commands, 2 agents shipped together

Good fit Use it to list cost and token outliers, with their model, start time, values, and outlier scores.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/hoangsonww/claude-code-agent-monitor/anomalies
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/hoangsonww/Claude-Code-Agent-Monitor

Made for: Claude Code.

Or install ccam-insights, the plugin that ships this one along with the rest of its 6 skills, 3 commands, 2 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 anomalies

README.md
[![agentmods](https://agentmods.dev/badge/commands/hoangsonww/claude-code-agent-monitor/anomalies/github.svg)](https://agentmods.dev/commands/hoangsonww/claude-code-agent-monitor/anomalies)
Your own site
<a href="https://agentmods.dev/commands/hoangsonww/claude-code-agent-monitor/anomalies"><img src="https://agentmods.dev/badge/commands/hoangsonww/claude-code-agent-monitor/anomalies/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 anomalies

Your own site · 80×15
<a href="https://agentmods.dev/commands/hoangsonww/claude-code-agent-monitor/anomalies"><img src="https://agentmods.dev/badge/commands/hoangsonww/claude-code-agent-monitor/anomalies.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 11 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 423 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00011 $0.00423
Opus 5 $0.00005 $0.00211
Sonnet 5 $0.00002 $0.00085
Haiku 4.5 $0.00001 $0.00042

Measured 8d ago against content hash 6a9244965be0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

anomalies scanned grade A with 1 finding 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 8d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- `curl -s "http://localhost:4820/api/sessions?limit=200"` → a session list; each item has `id`, `status`, `model`, `cwd`, `started_at`, `cost`, and `metadata`.
plugins/ccam-insights/commands/anomalies.md · 24 lines

What it actually says

List the current cost/token outlier sessions from the Agent Monitor dashboard using a z-score test. $ARGUMENTS optionally sets the z-score threshold (default 2.0; lower = stricter).

  1. Fetch the population:

    • curl -s "http://localhost:4820/api/sessions?limit=200" → a session list; each item has id, status, model, cwd, started_at, cost, and metadata.
  2. Compute the baseline over all returned sessions:

    • Mean and standard deviation of cost.
    • For sessions where you need token totals, pull curl -s http://localhost:4820/api/pricing/cost/<id> and sum input_tokens + output_tokens + cache_read_tokens + cache_write_tokens; compute mean and stddev of total tokens too.
  3. Flag outliers: any session whose z = (value − mean) / stddev exceeds the threshold (default 2.0) on cost (primary) or tokens (secondary). Skip the calc gracefully if stddev is 0.

  4. Print the flagged sessions, sorted by descending cost z-score:

    • Session id (short), model, started_at.
    • Cost (USD, 4 decimals) and its z-score.
    • Total tokens and its z-score (when fetched).
    • A flag tag: 🔴 if z > 3, 🟡 if z > 2.

Output rules: a Markdown table of flagged sessions only; currency in USD to 4 decimals; z-scores to 2 decimals; if nothing exceeds the threshold, say "No cost/token outliers above z=" and report the top session by cost for context. Cite only API values — never fabricate. If the dashboard is unreachable at http://localhost:4820, tell the user to start it with npm start from the repo root.

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. 8d ago First seen · 24 lines · 11 tokens per session scan A 6a9244965be0

Subscribe to this mod's changes

anomalies is a command published in the GitHub repository hoangsonww/Claude-Code-Agent-Monitor (991 stars, last pushed 3d ago), licensed MIT. It adds 11 tokens to every session and 423 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.