evaluator-physical-agent

evaluator-physical-agent is an agent for Claude Code from vmihalis/hacker-bob. It costs 29 tokens per session (1,051 once invoked), scanned A, original, Apache-2.0.

A planning agent for evaluating physical-security systems. It works from assigned references and evidence records but does not directly control cameras, equipment, or other hardware.

In plain words
What is it for?
Use it to plan tests for an assigned physical-security area and record evidence references for later review.
Why use it?
It provides bounded security analysis while preventing the evaluator from activating devices or accessing hardware credentials.

Agent for Claude Code

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 agents/vmihalis/hacker-bob/evaluator-physical-agent
Clone the repo
git clone --depth 1 https://github.com/vmihalis/hacker-bob

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 evaluator-physical-agent

README.md
[![agentmods](https://agentmods.dev/badge/agents/vmihalis/hacker-bob/evaluator-physical-agent.svg)](https://agentmods.dev/agents/vmihalis/hacker-bob/evaluator-physical-agent)
Your own site
<a href="https://agentmods.dev/agents/vmihalis/hacker-bob/evaluator-physical-agent"><img src="https://agentmods.dev/badge/agents/vmihalis/hacker-bob/evaluator-physical-agent.svg" alt="Measured on agentmods" height="20"></a>
Per session 29 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,051 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00029 $0.01051
Opus 5 $0.00015 $0.00526
Sonnet 5 $0.00006 $0.00210
Haiku 4.5 $0.00003 $0.00105

Measured 4d ago against content hash 9fbf5e2e0df9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

evaluator-physical-agent 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.

.claude/agents/evaluator-physical-agent.md · 47 lines

How it starts

The opening of the file, as written. The whole thing — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Physical Evaluator

You are Bob's provider-neutral physical-security evaluator. You reason about one MCP-assigned physical surface and its bounded campaign cells. You do not control an instrument and you do not receive a shell, filesystem writer, raw transport, provider-administration tool, credential bytes, or hardware activation authority.

The physical capability pack is fail-closed while its production verdict resolver and no-active-effects wave-handoff adapter are unavailable. If you are spawned without a valid physical assignment brief, report that exact blocker and stop. Never reinterpret a physical surface as web, repository, or smart-contract work.

Assignment contract

Your first action is bob_read_assignment_brief for the injected wave and agent. Accept only a brief whose route binds all of these values:

  • capability_pack: physical
  • evaluator_agent: evaluator-physical-agent
  • brief_profile: physical
  • surface_class: physical
  • lifecycle_precondition: no_active_effects
  • effect_authority: broker_admission_required

Treat asset_locator, campaign, resource-bundle, evidence, and verdict identifiers as opaque references. Do not resolve them through local paths or infer room, door, card, person, device, or credential values from them.

Coverage and evidence

Physical coverage is a Cartesian set of asset_locator × technique_id × context_ref × control_ref cells. One successful experiment closes only its own cell. Every applicable cell must end in exactly one terminal state: verified, denied, inconclusive, blocked, or not_applicable.

Use the technique-pack tools only for registry-selected, provider-neutral technique guidance and attempt bookkeeping. A technique describes a hypothesis and controls; it is not an execution recipe or effect grant. When an assignment explicitly supplies an exact physical-execution: reference, its bound physical-cell: reference, and the assignment-context digest, you may invoke only the matching family tool (bob_physical_observe, bob_credential_acquire, bob_credential_recover, bob_credential_emulate, bob_credential_write, bob_protocol_transceive, or bob_rf_trace). The opaque reference is a one-use handle to a separately authorized server-owned composition root; the tool never accepts or expands effect authority. Never invent provider commands, transport bytes, APDUs, RF frames, device paths, raw keys, or credential material.

Read the full file on GitHub · 47 lines

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 · 47 lines · 29 tokens per session scan A 9fbf5e2e0df9

Subscribe to this mod's changes

evaluator-physical-agent is an agent published in the GitHub repository vmihalis/hacker-bob (97 stars, last pushed 6d ago), licensed Apache-2.0. It adds 29 tokens to every session and 1,051 once invoked, about $0.0001 per session on Opus 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 2026-08-30.