throughline

throughline is a plugin for Claude Code from jovesun-lab/whetstone. Its manifest loads nothing; the 1 skill, 2 commands it bundles cost 277 tokens per session together, scanned A, original, MIT.

A task tracker and handoff tool for AI agents working across long or multiple sessions. It keeps one main goal visible and records notes so another agent can continue the work.

In plain words
What is it for?
Use it to track the main goal during a session and create a plain-text handoff between sessions or agents. It is intended for extended work, not short tasks completed in one pass.
Why use it?
Long tasks can lose their direction, and a new session may not know what has already been decided. This keeps the current objective clear and gives the next agent context to check before continuing.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit Use it to track the main goal during a session and create a plain-text handoff between sessions or agents. It is intended for extended work, not short tasks completed in one pass.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add jovesun-lab/whetstone
/plugin install throughline
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.

agentmods badge for throughline

README.md
[![agentmods](https://agentmods.dev/badge/plugins/jovesun-lab/whetstone/throughline/github.svg)](https://agentmods.dev/plugins/jovesun-lab/whetstone/throughline)
Your own site
<a href="https://agentmods.dev/plugins/jovesun-lab/whetstone/throughline"><img src="https://agentmods.dev/badge/plugins/jovesun-lab/whetstone/throughline/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 throughline

Your own site · 80×15
<a href="https://agentmods.dev/plugins/jovesun-lab/whetstone/throughline"><img src="https://agentmods.dev/badge/plugins/jovesun-lab/whetstone/throughline.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 1 skill, 2 commands cost 277 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

throughline 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 2d 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.

handoff-skill/throughline/.claude-plugin/plugin.json · 18 lines

What it actually says

{
  "name": "throughline",
  "description": "Task-Track & Handoff for AI agents on long, multi-session work. Within a session it pins one ⭐️ MAIN goal (frozen title, explicit verdict at close) in an emoji-tagged task list so the agent doesn't drift; across sessions or agents it writes a plain-markdown handoff the next agent re-derives before trusting. Not for short, one-pass tasks.",
  "version": "0.3.0",
  "author": {
    "name": "arcgram.io"
  },
  "homepage": "https://github.com/jovesun-lab/whetstone/tree/main/handoff-skill/throughline",
  "repository": "https://github.com/jovesun-lab/whetstone",
  "license": "MIT",
  "keywords": [
    "handoff",
    "session-continuity",
    "task-tracking",
    "ai-agents",
    "anti-drift"
  ]
}
Contents

What it installs

The manifest is a name and a version. 1 skill, 2 commands travel with it, and installing the plugin installs all of them — 277 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.

  1. 2d ago Changed 1f497c2d66ab
  2. 1mo ago Changed · -1 lines f3fce38527b2
  3. 1mo ago First seen · 19 lines scan A 95bbd380af2b

Subscribe to this mod's changes

throughline 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.