witness

witness is an agent for Claude Code from IvMisticos/misticos.Claude. It costs 56 tokens per session (359 once invoked), scanned A, original, MIT.

A read-only browser inspection tool that captures named pages or screens in their reachable states and copies the visible and surrounding text into files. States can include empty, loading, error, filled, and focused views.

In plain words
What is it for?
Use it to check changed pages, screens, emails, notifications, command output, and API errors in a test build, with screenshots and exact text saved for review.
Why use it?
It gives a consistent record of what users can see and read, then reports only mismatches or problems against the project and supplied rules. It also says when a requested state could not be reached.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the misticos plugin — 1 skill, 6 agents shipped together

Good fit Use it to check changed pages, screens, emails, notifications, command output, and API errors in a test build, with screenshots and exact text saved for review.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/ivmisticos/misticos.claude/witness
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/IvMisticos/misticos.Claude

Made for: Claude Code.

Or install misticos, the plugin that ships this one along with the rest of its 1 skill, 6 agents.

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 witness

README.md
[![agentmods](https://agentmods.dev/badge/agents/ivmisticos/misticos.claude/witness/github.svg)](https://agentmods.dev/agents/ivmisticos/misticos.claude/witness)
Your own site
<a href="https://agentmods.dev/agents/ivmisticos/misticos.claude/witness"><img src="https://agentmods.dev/badge/agents/ivmisticos/misticos.claude/witness/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 witness

Your own site · 80×15
<a href="https://agentmods.dev/agents/ivmisticos/misticos.claude/witness"><img src="https://agentmods.dev/badge/agents/ivmisticos/misticos.claude/witness.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 359 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 original 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 $0.00056 $0.00359
Opus 5.5 $0.00022 $0.00144
Sonnet 5.5 $0.00011 $0.00072
Haiku 4.5 $0.00006 $0.00036

Measured 4d ago against content hash d6c7a3273f8b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

witness 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 4d 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.

agents/witness.md · 20 lines

What it actually says

Capture the visuals and prose at the paths or URIs the caller names, or everything changed since the base branch it names, including uncommitted work. List those changes with git diff --name-only $(git merge-base <base> HEAD) and git ls-files --others --exclude-standard.

Capture each visual, such as a page or screen, in every state it can reach: empty, loading, error, filled, focused, and any other state the caller lists. Take screenshots with Playwright, installed in your scratch folder if it's missing. Save them in the folder the caller names, by visual and state.

Copy all prose exactly as shown into text files in the same folder: on visuals, such as headings, labels, buttons, placeholders, tooltips, alt text, and messages, and outside them, such as emails, notifications, command output, and API errors.

Then check all of it against the rest of the project and the rules you got at the start. Report only what looks off or inconsistent, each with its file and state. If nothing is off, say so in one line. Don't repeat the contents: the caller reads the folder. If you can't reach a state, say what you tried.

Change data only in a test build the caller names.

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. 4d ago First seen · 20 lines · 56 tokens per session scan A d6c7a3273f8b

Subscribe to this mod's changes

witness is an agent published in the GitHub repository IvMisticos/misticos.Claude (3 stars, last pushed yesterday), licensed MIT. It adds 56 tokens to every session and 359 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-10-12.