observer

observer is a plugin for Claude Code from NVZver/claude-marketplace. Its manifest loads nothing; the 2 skills it bundles cost 288 tokens per session together, scanned A, original, MIT.

A Claude Code plugin for observing file changes and coaching an implementation through selected roles. It also checks individual implementation checkpoints against a specified requirement.

In plain words
What is it for?
Use it to observe coding changes as they happen, act as a rubber duck, pair programmer, or interviewer, and verify a requirement at a checkpoint.
Why use it?
It provides feedback while work is being written and can flag a checkpoint that does not meet its requirement. Its description does not specify how the coaching roles or checks are configured beyond a roles file.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest. Also seen: mentions Claude Code.

Good fit Use it to observe coding changes as they happen, act as a rubber duck, pair programmer, or interviewer, and verify a requirement at a checkpoint.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add NVZver/claude-marketplace
/plugin install observer
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/NVZver/claude-marketplace

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 observer

README.md
[![agentmods](https://agentmods.dev/badge/plugins/nvzver/claude-marketplace/observer/github.svg)](https://agentmods.dev/plugins/nvzver/claude-marketplace/observer)
Your own site
<a href="https://agentmods.dev/plugins/nvzver/claude-marketplace/observer"><img src="https://agentmods.dev/badge/plugins/nvzver/claude-marketplace/observer/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 observer

Your own site · 80×15
<a href="https://agentmods.dev/plugins/nvzver/claude-marketplace/observer"><img src="https://agentmods.dev/badge/plugins/nvzver/claude-marketplace/observer.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 288 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

observer 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 1mo 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.

observer/.claude-plugin/plugin.json · 12 lines

What it actually says

{
  "name": "observer",
  "description": "Live observe-and-coach discipline for the NVZver marketplace. Rides Claude Code's self-paced /loop through two Actors. observer:observe reacts to your file changes through a chosen role (rubber-duck, pair-programmer, interviewer, custom), read as data from one Knowledge file (roles.md). observer:verify-checkpoint gates an implementer's increment: on a checkpoint signal it grades that one F-requirement does·only (not the whole-plan all check — that stays with lsa:reconcile) and emits CLEAR (auto-clears) or BLOCK (surfaced to the human), read-only to the graded artifacts. Depends on core (ground-rules, output).",
  "version": "0.3.3",
  "author": {
    "name": "Nikita Zverev"
  },
  "dependencies": [
    "core"
  ]
}
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 — 288 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. 1mo ago First seen · 12 lines scan A 2053041c25dc

Subscribe to this mod's changes

observer is a plugin published in the GitHub repository NVZver/claude-marketplace (1 stars, last pushed 1mo ago), 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.

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