measure

measure is a skill for Claude Code from synaptiai/agent-capability-standard. It costs 28 tokens per session (1,490 once invoked), scanned A, original, Apache-2.0.

A measurement skill for calculating a value for a target and stating the uncertainty around that result.

In plain words
What is it for?
Use it to quantify metrics such as risk, complexity, effort, impact, or size.
Why use it?
It makes estimates and assessments clearer by defining what is measured, how it is measured, and how reliable the number is.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: agent in frontmatter.

Part of the agent-capability-standard plugin — 42 skills, 2 hooks 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 skills/synaptiai/agent-capability-standard/measure
Any agent
npx skills add synaptiai/agent-capability-standard --skill measure
Clone the repo
git clone --depth 1 https://github.com/synaptiai/agent-capability-standard

Made for: Claude Code.

Or install agent-capability-standard, the plugin that ships this one along with the rest of its 42 skills, 2 hooks.

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 measure

README.md
[![agentmods](https://agentmods.dev/badge/skills/synaptiai/agent-capability-standard/measure.svg)](https://agentmods.dev/skills/synaptiai/agent-capability-standard/measure)
Your own site
<a href="https://agentmods.dev/skills/synaptiai/agent-capability-standard/measure"><img src="https://agentmods.dev/badge/skills/synaptiai/agent-capability-standard/measure.svg" alt="Measured on agentmods" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,490 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 $0.00028 $0.01490
Opus 5 $0.00014 $0.00745
Sonnet 5 $0.00006 $0.00298
Haiku 4.5 $0.00003 $0.00149

Measured 6d ago against content hash 03c1ada5068e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

measure 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 6d 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/measure/SKILL.md · 210 lines

How it starts

The opening of the file, as written. The whole thing — 210 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Intent

Quantify a specific metric for a target, providing a numerical value with explicit uncertainty bounds. This capability consolidates all estimation tasks (risk, impact, effort, etc.) into a single parameterized operation.

Success criteria:

  • Numerical value provided for requested metric
  • Uncertainty bounds explicitly stated
  • Measurement method documented
  • Units clearly specified

Compatible schemas:

  • schemas/output_schema.yaml

Inputs

Parameter Required Type Description
target Yes any What to measure (system, code, entity, process)
metric Yes string The metric to quantify (risk, complexity, effort, size, etc.)
unit No string Unit of measurement (optional, inferred if not provided)
method No string Measurement approach (heuristic, statistical, model-based)

Procedure

  1. Define the metric: Clarify exactly what is being measured

    • Establish clear definition of the metric
    • Identify appropriate unit of measurement
    • Determine measurement methodology
  2. Gather measurement inputs: Collect data needed for measurement

    • Read relevant files, logs, or data sources
    • Identify quantifiable indicators
    • Note data quality and completeness
  3. Calculate measurement: Apply measurement method to inputs

    • Use appropriate calculation for the metric type
    • For risk: probability * impact assessment
    • For complexity: cyclomatic, cognitive, or structural metrics
    • For effort: decomposition and estimation techniques
  4. Establish uncertainty bounds: Quantify measurement confidence

    • Calculate or estimate lower and upper bounds
    • Consider data quality, method limitations
    • Express as confidence interval or range
  5. Ground the measurement: Document evidence and method

    • Reference specific data points used
    • Note any assumptions in calculation
    • Document measurement methodology

Output Contract

Read the full file on GitHub · 210 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 6d ago First seen · 210 lines · 28 tokens per session scan A 03c1ada5068e

Subscribe to this mod's changes

measure is a skill published in the GitHub repository synaptiai/agent-capability-standard (4 stars, last pushed 7d ago), licensed Apache-2.0. It adds 28 tokens to every session and 1,490 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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