perlytics-skill: Instructions file for Codex

AGENTS.md

perlytics-skill AGENTS.md is an instructions file for Codex, OpenCode from thuong-nc/perlytics-skill. It costs 487 tokens per session, scanned A, original, Apache-2.0.

Repository instructions for a collection of analytics skills, with a map from common data questions to the skill that should handle them. Analytics means examining data to understand performance, change, and user behavior.

In plain words
What is it for?
Selecting workflows for metric checks, exploratory analysis, root-cause investigations, customer segments, retention, funnels, forecasts, experiments, and stakeholder summaries.
Why use it?
They stop an agent from choosing an unsuitable analysis method or manually handling data when a dedicated workflow is required. They also define a first step for new datasets.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: reads ~/.codex paths; mentions Codex.

This is thuong-nc/perlytics-skill's own configuration. It tells Codex and OpenCode how to work on perlytics-skill itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything perlytics-skill configures →

Reuse

Borrowing it

Nothing to install: this file belongs to thuong-nc/perlytics-skill. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/thuong-nc/perlytics-skill/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/thuong-nc/perlytics-skill

Made for: Codex, OpenCode.

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 perlytics-skill AGENTS.md

README.md
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Your own site
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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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/thuong-nc/perlytics-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/thuong-nc/perlytics-skill/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 487 This file is loaded in full into every session.
When invoked 487 The same file — it is already loaded in full.
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 $0.00487 $0.00487
Opus 5.5 $0.00195 $0.00195
Sonnet 5.5 $0.00097 $0.00097
Haiku 4.5 $0.00049 $0.00049

Measured 1mo ago against content hash 1e2e64bf51ba, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

perlytics-skill AGENTS.md 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

AGENTS.md · 32 lines

What it actually says

Perlytics Analytics Skills

Skills are installed at .codex/skills/perlytics-skill/. When the user asks any analytics question, always use the matching skill below. Do not analyze data manually.

Trigger map

User intent Skill to use
Open-ended: "analyze", "what's going on", "phân tích", "tell me about this data" analysis-readout
"why did X drop/spike", "what drove this change", "tại sao giảm" root-cause-analysis
"segment customers", "who are our best customers", "RFM", "phân khúc" segmentation-analysis
"retention", "cohort", "do customers come back" cohort-retention
"funnel", "conversion drop", "where do users drop off" funnel-analysis
"forecast", "predict next quarter", "dự báo" forecasting-readout
"A/B test", "experiment results", "did the test work" experiment-readout
New dataset, no specific question yet data-quality-check first, then exploratory-data-analysis
"write a memo", "summary for stakeholders", "báo cáo" stakeholder-memo
"is this metric well-defined", "what should we measure" metric-definition
"break down the problem", "where to look" hypothesis-tree
"is this causal", "does X cause Y" causal-inference-check
"critique this dashboard" dashboard-critique
"what data do we need", "write a data request" data-request-spec
Question is ambiguous and needs scoping clarify-question

How to use a skill

  1. Read .codex/skills/perlytics-skill/skills/<skill-name>/SKILL.md
  2. Follow the workflow step by step — never skip steps
  3. analysis-readout always chains the full pipeline and writes output to report-YYYY-MM-DD.md
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 · 32 lines · 487 tokens per session scan A 1e2e64bf51ba

Subscribe to this mod's changes

perlytics-skill AGENTS.md is an instructions file published in the GitHub repository thuong-nc/perlytics-skill (5 stars, last pushed 6mo ago), licensed Apache-2.0. It adds 487 tokens to every session, about $0.0019 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 2026-08-31.

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