# Benchmark

> >

- **Type:** Skill
- **Install:** `agentstack add skill-hoangsonww-claude-code-agent-monitor-benchmark`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [hoangsonww](https://agentstack.voostack.com/s/hoangsonww)
- **Installs:** 0
- **Category:** [Databases](https://agentstack.voostack.com/c/databases)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [hoangsonww](https://github.com/hoangsonww)
- **Source:** https://github.com/hoangsonww/Claude-Code-Agent-Monitor/tree/master/plugins/ccam-insights/skills/benchmark
- **Website:** https://hoangsonww.github.io/Claude-Code-Agent-Monitor/

## Install

```sh
agentstack add skill-hoangsonww-claude-code-agent-monitor-benchmark
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Benchmark

Score a session against the rolling population average and report its percentile on
cost, tokens, tool count, and complexity using Agent Monitor data.

## Input

The user provides: **$ARGUMENTS**

This may be:
- A single session ID — benchmark that session
- "latest" — benchmark the most recent session
- "latest N" — benchmark the N most recent sessions, each vs the average
- empty — benchmark the most recent session (default)

## Data Sources

| Endpoint | Returns |
|----------|---------|
| `GET /api/sessions?limit=N` | Population of sessions with `cost`, `model`, `started_at`, `metadata` (turn_count, total_turn_duration_ms) — builds the rolling baseline |
| `GET /api/pricing/cost/{sessionId}` | `{ total_cost, breakdown:[{ input_tokens, output_tokens, cache_read_tokens, cache_write_tokens, cost }] }` — the target session's cost and tokens |
| `GET /api/workflows/{sessionId}` | `complexity` (score), `stats` (tool/event counts), `toolFlow` (distinct tools used) — the target session's tool count and complexity |
| `GET /api/analytics` | `avg_events_per_session`, `tool_usage`, `daily_sessions` — corroborates population-level averages |

## Report Sections

### 1. Build the Baseline
Fetch the population with `GET /api/sessions?limit=200` (the rolling set). For each
session gather cost (`GET /api/pricing/cost/{id}` or the list `cost` field), total
tokens (sum of the 4 token types from the pricing breakdown), tool count and
complexity (`GET /api/workflows/{id}`). Compute mean, median, and standard
deviation for each metric across the population.

### 2. Measure the Target
For the requested session, pull the same four metrics:
- **Cost** — `total_cost` from `GET /api/pricing/cost/{id}`.
- **Total tokens** — `input + output + cache_read + cache_write` summed from the breakdown.
- **Tool count** — distinct/total tools from `GET /api/workflows/{id}` `stats`/`toolFlow`.
- **Complexity score** — `complexity.score` from `GET /api/workflows/{id}`.

### 3. Percentile and Deviation
For each metric report the target's percentile within the population (share of
sessions at or below it) and its z-score `(value − mean) / stddev`. Label each:
below average / typical / above average / outlier (|z| > 2).

### 4. Verdict
State whether the session was normal overall. If it is an outlier, name which
metric drove it (e.g., complexity p96, cost p91 → an unusually heavy session).

## Output

- A Markdown table: metric | session value | population mean | percentile | z-score | label.
- Currency in USD to 4 decimals; tokens and tool counts as integers; complexity to 2 decimals.
- Use ▲ for above-average and ▼ for below-average vs the mean.
- One-line verdict: "Normal session" or "Outlier — driven by  (pNN)".
- When benchmarking multiple sessions, one row block per session plus a summary line.
- Read-only: percentiles come only from the fetched population; never fabricate the baseline.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [hoangsonww](https://github.com/hoangsonww)
- **Source:** [hoangsonww/Claude-Code-Agent-Monitor](https://github.com/hoangsonww/Claude-Code-Agent-Monitor)
- **License:** MIT
- **Homepage:** https://hoangsonww.github.io/Claude-Code-Agent-Monitor/

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-hoangsonww-claude-code-agent-monitor-benchmark
- Seller: https://agentstack.voostack.com/s/hoangsonww
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.