perception

perception is a skill for Claude Code, Codex from jatingargiitk/evoagents. It costs 15 tokens per session (591 once invoked), scanned A, a copy of perception, MIT.

A question-analysis skill that extracts the user's intent, important topics, constraints, time sensitivity, and complexity into structured JSON. It is intended for use before downstream planning.

In plain words
What is it for?
Use it when a new user question needs structured analysis. It identifies entities and topics without guessing the answer.
Why use it?
It gives later planning steps a consistent summary of what the user asked for. It also highlights when current or recent information is required.

Skill for Claude CodeCodex

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 skills/jatingargiitk/evoagents/v1
Any agent
npx skills add jatingargiitk/evoagents --skill v1
Clone the repo
git clone --depth 1 https://github.com/jatingargiitk/evoagents

Made for: Claude Code, Codex.

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 perception

README.md
[![agentmods](https://agentmods.dev/badge/skills/jatingargiitk/evoagents/v1.svg)](https://agentmods.dev/skills/jatingargiitk/evoagents/v1)
Your own site
<a href="https://agentmods.dev/skills/jatingargiitk/evoagents/v1"><img src="https://agentmods.dev/badge/skills/jatingargiitk/evoagents/v1.svg" alt="Measured on agentmods" height="20"></a>
Per session 15 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 591 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 89% copy Near-identical to another mod 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 $0.00015 $0.00591
Opus 5 $0.00008 $0.00296
Sonnet 5 $0.00003 $0.00118
Haiku 4.5 $0.00002 $0.00059

Measured 5d ago against content hash 51334aff2797, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

perception 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 5d 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.

Origin

This is a copy

89% identical to perception — 16 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

evoagents/presets/research/skills/perception/versions/v1/SKILL.md · 91 lines

How it starts

The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Perception Skill

Analyze the user's question and extract structured information for downstream planning.

When to Use

USE this skill when:

  • A new user question arrives and needs to be analyzed
  • Downstream skills need structured context about the query

When NOT to Use

DON'T use this skill when:

  • The question has already been analyzed by a prior perception pass

Constraints

  • MUST output valid JSON matching the Output Format schema
  • MUST set recency_required to true if the question asks about recent, current, or time-sensitive information
  • MUST identify all key entities and topics in the question
  • MUST include temporal/recency keywords (e.g. "latest", "recent", "2025", "current", "today") as entities when present in the question
  • NEVER include speculation about the answer — only analyze the question itself

Output Format

Respond with ONLY a JSON object:

{
  "intent": "What the user wants to know (1 sentence)",
  "entities": ["key entities", "topics", "concepts"],
  "constraints": ["time range", "domain", "format constraints"],
  "recency_required": true,
  "complexity": "simple | moderate | complex"
}

Examples

Query: "What happened in AI this week?" Expected output:

{
  "intent": "Find recent AI news and developments from the past week",
  "entities": ["artificial intelligence", "AI news", "this week"],
  "constraints": ["time range: past week"],
  "recency_required": true,
  "complexity": "moderate"
}

Query: "What are the latest breakthroughs in quantum computing in 2025?" Expected output:

{
  "intent": "Find the most recent quantum computing advances in 2025",
  "entities": ["quantum computing", "breakthroughs", "latest", "2025"],
  "constraints": ["time range: 2025", "domain: quantum computing"],
  "recency_required": true,
  "complexity": "moderate"
}

Query: "Explain how gradient descent works" Expected output:

{
  "intent": "Explain the gradient descent optimization algorithm",
  "entities": ["gradient descent", "optimization", "machine learning"],
  "constraints": [],
  "recency_required": false,
  "complexity": "moderate"
}

Read the full file on GitHub · 91 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. 5d ago First seen · 91 lines · 15 tokens per session scan A 51334aff2797

Subscribe to this mod's changes

perception is a skill published in the GitHub repository jatingargiitk/evoagents (2 stars, last pushed 6mo ago), licensed MIT. It adds 15 tokens to every session and 591 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to perception, differing in 16 lines, and is treated as a copy.

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