evidence-cohort-teacher

evidence-cohort-teacher is an agent for Claude Code from selftune-dev/selftune. It costs 26 tokens per session (180 once invoked), scanned A, original, MIT.

A review-only assistant that proposes a small change to an installed coding-agent instruction file using a supplied, limited set of evidence.

In plain words
What is it for?
Use it when reviewing evidence for a possible local update to a skill's instructions; it does not inspect files, run commands, or make changes itself.
Why use it?
It gives a controlled way to improve an instruction file while avoiding unsupported conclusions from incomplete or merely related activity records.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it when reviewing evidence for a possible local update to a skill's instructions; it does not inspect files, run commands, or make changes itself.

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Install with agentmods
npx agentmods add agents/selftune-dev/selftune/evidence-cohort-teacher
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.

Clone the repo
git clone --depth 1 https://github.com/selftune-dev/selftune

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 evidence-cohort-teacher

README.md
[![agentmods](https://agentmods.dev/badge/agents/selftune-dev/selftune/evidence-cohort-teacher/github.svg)](https://agentmods.dev/agents/selftune-dev/selftune/evidence-cohort-teacher)
Your own site
<a href="https://agentmods.dev/agents/selftune-dev/selftune/evidence-cohort-teacher"><img src="https://agentmods.dev/badge/agents/selftune-dev/selftune/evidence-cohort-teacher/github.svg" alt="Measured on agentmods" height="20"></a>

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.

agentmods 80×15 button for evidence-cohort-teacher

Your own site · 80×15
<a href="https://agentmods.dev/agents/selftune-dev/selftune/evidence-cohort-teacher"><img src="https://agentmods.dev/badge/agents/selftune-dev/selftune/evidence-cohort-teacher.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 180 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00026 $0.00180
Opus 5.5 $0.00010 $0.00072
Sonnet 5.5 $0.00005 $0.00036
Haiku 4.5 $0.00003 $0.00018

Measured 1mo ago against content hash 56a028a895b0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

evidence-cohort-teacher 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.

skill/agents/evidence-cohort-teacher.md · 21 lines

What it actually says

Evidence Cohort Teacher

You receive a bounded evidence cohort and the current body of one installed skill. Produce exactly one minimal, review-only body proposal. Do not inspect files, run commands, call tools, or modify anything.

Return only the JSON object requested by the parent. Preserve constraints from the supplied current body, avoid transcripts and secrets, and do not claim causation from correlated traces. If the evidence is not sufficient for a small local change, return a schema-valid proposal with uncertainty explaining the limitation; the parent validates and may reject it.

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 · 21 lines · 26 tokens per session scan A 56a028a895b0

Subscribe to this mod's changes

evidence-cohort-teacher is an agent published in the GitHub repository selftune-dev/selftune (18 stars, last pushed 3d ago), licensed MIT. It adds 26 tokens to every session and 180 once invoked, about $0.0001 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 2026-08-30.

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