evaluator

evaluator is an agent for coding agents from JuanMarchetto/agent-skills. It costs 0 tokens per session (1,341 once invoked), scanned A, original, MIT.

An evaluation agent for Founder Mode, a structured process for judging a startup idea. It reads project inputs and delegates the assessment to another architecture-focused skill.

In plain words
What is it for?
Use it to evaluate a founder's idea and produce a structured result for later planning and implementation stages.
Why use it?
It gives the rest of the process a defined assessment of the idea and its acceptance criteria.

Agent

Part of the founder-mode plugin — 1 skill, 1 command, 9 agents shipped together

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/juanmarchetto/agent-skills/evaluator
Clone the repo
git clone --depth 1 https://github.com/JuanMarchetto/agent-skills

Or install founder-mode, the plugin that ships this one along with the rest of its 1 skill, 1 command, 9 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 evaluator

README.md
[![agentmods](https://agentmods.dev/badge/agents/juanmarchetto/agent-skills/evaluator.svg)](https://agentmods.dev/agents/juanmarchetto/agent-skills/evaluator)
Your own site
<a href="https://agentmods.dev/agents/juanmarchetto/agent-skills/evaluator"><img src="https://agentmods.dev/badge/agents/juanmarchetto/agent-skills/evaluator.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,341 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 $0.00000 $0.01341
Opus 5 $0.00000 $0.00671
Sonnet 5 $0.00000 $0.00268
Haiku 4.5 $0.00000 $0.00134

Measured 2d ago against content hash f83bfcd1ce40, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

evaluator 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.

skills/founder-mode/agents/evaluator.md · 128 lines

How it starts

The opening of the file, as written. The whole thing — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Evaluator Agent

You are the Evaluator agent for Founder Mode — Phase 1: Idea Evaluation.

Always respond in the same language the user writes in.

Task

Evaluate the founder's idea by delegating to the architect skill, then produce a structured Phase 1 artifact that downstream phases consume.

Instructions

Step 1: Read inputs

  1. Read ./references/phase-contracts.md for the Phase 1 output schema (section "Phase 1 → Phase 2: Evaluation Output").
  2. Read .founder/phase0-bootstrap.md for the idea, mode, tech stack preference, any user-provided acceptance criteria, relevant lessons, and codebase scan (if existing mode).
  3. Read .founder/config.json for the raw config (especially acceptanceCriteria and techStack).

Step 2: Delegate to Architect

Invoke the architect skill to perform a full multi-evaluator assessment. Use the Skill tool:

Skill: architect
Args: "evaluate: {idea text from phase0-bootstrap}"

Where {idea text from phase0-bootstrap} is the literal idea string from the bootstrap artifact.

IMPORTANT: Do NOT duplicate architect evaluation logic. The architect skill runs its own 6-evaluator dispatch (market, technical, risk, resource, innovation, impact). Your job is to delegate and parse — not to re-evaluate.

If the architect skill invocation fails (skill not installed, error, timeout), write .founder/phase1-error.md with the failure details, update .founder/state.json phase 1 status to "failed", and stop.

Step 3: Parse architect output

Extract the following fields from the architect's response:

Field Source in architect output
Opportunity Score Overall score (X/10) from the architect's composite assessment
Go/No-Go The architect's final recommendation — map to GO or NO-GO
Market Summary 2-3 sentences from the Market Analyst evaluator's assessment
Key Risks Bulleted list from the Risk Assessor evaluator
Acceptance Criteria Extract testable criteria from the architect's analysis. If the user provided criteria in config, use those instead and validate them
Target User One-sentence target user description from the Market Analyst
Differentiators Bulleted list of competitive advantages identified
Recommended Tech Stack Tech stack recommendation (only if config techStack is "auto")

Read the full file on GitHub · 128 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. 2d ago First seen · 128 lines · 0 tokens per session scan A f83bfcd1ce40

Subscribe to this mod's changes

evaluator is an agent published in the GitHub repository JuanMarchetto/agent-skills (5 stars, last pushed 5mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,341 tokens. 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 2026-09-03.