A plugin that opens an interactive interface for reviewing and marking up agent plans. It connects plan review with plan-mode hooks and supports sharing plans with a team.

Use it to review, annotate, improve, and collaborate on implementation plans during plan mode.

It gives people a way to refine a plan together before the agent carries it out.

hook — Plugin by backnotprop

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 plugins/backnotprop/plannotator/hook

Claude Code

/plugin marketplace add backnotprop/plannotator

Clone the repo

git clone --depth 1 https://github.com/backnotprop/plannotator

Made for: Claude Code.

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

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

hook 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.

apps/hook/.claude-plugin/plugin.json · 11 lines

What it actually says

{
  "name": "plannotator",
  "description": "Interactive Plan Review: Mark up and refine your plans using a UI, easily share for team collaboration, automatically integrates with plan mode hooks.",
  "version": "0.27.9",
  "author": {
    "name": "backnotprop"
  },
  "repository": "https://github.com/backnotprop/plannotator",
  "keywords": ["planning", "review", "hooks", "ExitPlanMode", "collaboration"]
}

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 First seen · 11 lines scan A 5ccf4fd120e8

Subscribe to this mod's changes

hook is a plugin published in the GitHub repository backnotprop/plannotator (8,256 stars, last pushed 2d ago), licensed Apache-2.0. 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 2026-08-30.

Code review Frontend Planning claude-code codex obsidian opencode pi-mono plan-mode

hook

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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