phase_4

phase_4 is an agent for coding agents from jeremylongshore/plugins-nixtla. It costs 0 tokens per session (670 once invoked), scanned A, original, no licence file.

A verification agent that runs automated scripts against conclusions from data-quality and model-planning phases. Empirical verification means checking those conclusions with actual data and executed tests.

In plain words
What is it for?
Use it to verify Phase 2 and Phase 3 findings with automated checks and data-based results.
Why use it?
It tests whether earlier phase results hold up when verified by scripts and evidence.

Agent

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/jeremylongshore/plugins-nixtla/phase_4
Clone the repo
git clone --depth 1 https://github.com/jeremylongshore/plugins-nixtla

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 phase_4

README.md
[![agentmods](https://agentmods.dev/badge/agents/jeremylongshore/plugins-nixtla/phase_4.svg)](https://agentmods.dev/agents/jeremylongshore/plugins-nixtla/phase_4)
Your own site
<a href="https://agentmods.dev/agents/jeremylongshore/plugins-nixtla/phase_4"><img src="https://agentmods.dev/badge/agents/jeremylongshore/plugins-nixtla/phase_4.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 670 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00670
Opus 5 $0.00000 $0.00335
Sonnet 5 $0.00000 $0.00134
Haiku 4.5 $0.00000 $0.00067

Measured 5d ago against content hash 963654084d80, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

phase_4 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.

002-workspaces/test-harness-lab/reference-implementation/agents/phase_4.md · 88 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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 · 88 lines · 0 tokens per session scan A 963654084d80

Subscribe to this mod's changes

phase_4 is an agent published in the GitHub repository jeremylongshore/plugins-nixtla (11 stars, last pushed today), with no licence file. It costs nothing until one of its globs matches a file; then it loads 670 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 2026-08-31.