A session monitor that tracks how full a single AI-agent conversation has become. It reports when the conversation is getting overloaded and may need to be wrapped up or handed over.

Use it to monitor context usage during long coding sessions, decide when to create a handoff, and record when the host cannot provide an exact context size.

Long conversations can leave less room for useful context and make answers worse, so this helps reveal when that risk is rising.

strain — Plugin for Claude Code by jovesun-lab/whetstone

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/jovesun-lab/whetstone

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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/jovesun-lab/whetstone/strain/github.svg)](https://agentmods.dev/plugins/jovesun-lab/whetstone/strain)

Your own site

<a href="https://agentmods.dev/plugins/jovesun-lab/whetstone/strain"><img src="https://agentmods.dev/badge/plugins/jovesun-lab/whetstone/strain/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.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/jovesun-lab/whetstone/strain"><img src="https://agentmods.dev/badge/plugins/jovesun-lab/whetstone/strain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured The manifest loads nothing itself; its 2 skills cost 295 tokens a session between them.

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.

Security

Grade A, and why

strain 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 yesterday.

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.

strain/.claude-plugin/plugin.json · 21 lines

What it actually says

{
  "name": "strain",
  "version": "0.10.0",
  "description": "A session-strain meter for long agent sessions. Counts how loaded a single conversation has become and makes the agent report it on its own, on a schedule it cannot quietly skip, so you find out that a session should be wrapped before its answers start degrading. Reads the real context size on hosts that expose one, and says so plainly when it cannot.",
  "author": {
    "name": "arcgram.io"
  },
  "keywords": [
    "session-strain",
    "context-window",
    "agent-operating-frame",
    "handoff",
    "hook",
    "long-sessions",
    "ai-agents"
  ],
  "license": "MIT",
  "homepage": "https://github.com/jovesun-lab/whetstone/tree/main/strain",
  "repository": "https://github.com/jovesun-lab/whetstone"
}

Contents

What it installs

The manifest is a name and a version. 2 skills travel with it, and installing the plugin installs all of them — 295 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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.

yesterday Changed eb0878f312bb
4d ago Changed f0e8850f0a60
6d ago Changed d67780ef5236
7d ago Changed e0af688619e3
15d ago Changed a2c9f6280687
16d ago Changed · +1 lines 06f45e40778a
24d ago Changed 786b88d509db
28d ago Changed · -1 lines 5d5bb3844280
1mo ago Changed 19caab552db6
1mo ago First seen · 21 lines scan A bf5831a61220

Subscribe to this mod's changes

strain is a plugin published in the GitHub repository jovesun-lab/whetstone (8 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.

Productivity agent-skills ai-agents claude codex cursor gemini

strain

Getting it into your agent

Wrote this? Show the measurements

Grade A, and why

Nothing flagged

What it actually says

What it installs

What this file has done since we first saw it

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