aria-context-monitor

aria-context-monitor is a skill for Claude Code from 10CG/aria-plugin. It costs 96 tokens per session (1,526 once invoked), scanned A, original, no licence file.

A monitor that reads the current Claude Code session’s context usage and returns the used amount, remaining amount, window size, confidence, and data age. Context is the conversation and information the model can use in one session.

In plain words
What is it for?
Checking context usage, deciding whether to continue or pause, and supporting pause decisions during implementation work.
Why use it?
It replaces guesses about whether a session has enough remaining capacity to continue or should be paused.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the aria plugin — 42 skills, 11 agents, 3 hooks shipped together

Good fit Checking context usage, deciding whether to continue or pause, and supporting pause decisions during implementation work.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/10cg/aria-plugin/aria-context-monitor
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 10CG/aria-plugin --skill aria-context-monitor
Clone the repo
git clone --depth 1 https://github.com/10CG/aria-plugin

Made for: Claude Code.

Or install aria, the plugin that ships this one along with the rest of its 42 skills, 11 agents, 3 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 aria-context-monitor

README.md
[![agentmods](https://agentmods.dev/badge/skills/10cg/aria-plugin/aria-context-monitor/github.svg)](https://agentmods.dev/skills/10cg/aria-plugin/aria-context-monitor)
Your own site
<a href="https://agentmods.dev/skills/10cg/aria-plugin/aria-context-monitor"><img src="https://agentmods.dev/badge/skills/10cg/aria-plugin/aria-context-monitor/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 aria-context-monitor

Your own site · 80×15
<a href="https://agentmods.dev/skills/10cg/aria-plugin/aria-context-monitor"><img src="https://agentmods.dev/badge/skills/10cg/aria-plugin/aria-context-monitor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 96 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,526 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 unknown 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 $0.00096 $0.01526
Opus 5 $0.00048 $0.00763
Sonnet 5 $0.00019 $0.00305
Haiku 4.5 $0.00010 $0.00153

Measured 12d ago against content hash 868dd40bbf44, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

aria-context-monitor 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 12d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/setup_relay.sh, tests/setup_relay.test.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/aria-context-monitor/SKILL.md · 119 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

2 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. 12d ago First seen · 119 lines · 96 tokens per session scan A 868dd40bbf44

Subscribe to this mod's changes

aria-context-monitor is a skill published in the GitHub repository 10CG/aria-plugin (1 stars, last pushed 3d ago), with no licence file. It adds 96 tokens to every session and 1,526 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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