What is drift-review?

An agent that checks one target for instruction drift, where the same rule is stated normatively in more than one place.

It is for running the drift check as part of the skill-review process, or performing that check directly on a specified target.

It helps find duplicated rules that could later disagree when one copy changes.

drift-review — Agent for Claude Code by jhoblitt/skill-review-claude

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code

/plugin marketplace add jhoblitt/skill-review-claude

Claude Code

/plugin install skill-review

Made for: Claude Code.

Or install skill-review, the plugin that ships this one along with the rest of its 1 skill, 4 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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/jhoblitt/skill-review-claude/drift-review/github.svg)](https://agentmods.dev/agents/jhoblitt/skill-review-claude/drift-review)

Your own site

<a href="https://agentmods.dev/agents/jhoblitt/skill-review-claude/drift-review"><img src="https://agentmods.dev/badge/agents/jhoblitt/skill-review-claude/drift-review/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/jhoblitt/skill-review-claude/drift-review"><img src="https://agentmods.dev/badge/agents/jhoblitt/skill-review-claude/drift-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 55 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 133 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.

Model	Per session	Once invoked
Fable 5.1	$0.00055	$0.00133
Opus 5.5	$0.00022	$0.00053
Sonnet 5.5	$0.00011	$0.00027
Haiku 4.5	$0.00006	$0.00013

Measured 2mo ago against content hash a37b23477ecb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

drift-review 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 2mo 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.

plugins/skill-review/agents/drift-review.md · 11 lines

What it actually says

Read ${CLAUDE_PLUGIN_ROOT}/skills/skill-review/SKILL.md and ${CLAUDE_PLUGIN_ROOT}/skills/skill-review/references/drift.md, and run that axis under them over the target your dispatch names.

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.

2mo ago First seen · 11 lines · 55 tokens per session scan A a37b23477ecb

Subscribe to this mod's changes

drift-review is an agent published in the GitHub repository jhoblitt/skill-review-claude (2 stars, last pushed 24d ago), licensed Apache-2.0. It adds 55 tokens to every session and 133 once invoked, about $0.0002 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.

Building agents

drift-review next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
drift-reviewjhoblitt/skill-review-claude	Agent	2	24d ago	Apache-2.0	A	55	Claude Code
playwright-test-generatormicrosoft/playwright	Agent	99k	today	Apache-2.0	A	151	Claude Code
.NET-Notebook-Migration-Agentmicrosoft/ai-agents-for-beginners	Agent	79k	today	MIT	A	33	Claude Code
AVM Owner Triagegithub/awesome-copilot	Agent	41k	yesterday	MIT	A	61	Claude Code
Ultimate Transparent Thinking Beast Modegithub/awesome-copilot	Agent	41k	yesterday	MIT	A	11	Claude Code
code-revieweranthropics/claude-cookbooks	Agent	54k	3d ago	MIT	A	52	Claude Code
Pimcore Expertgithub/awesome-copilot	Agent	41k	yesterday	MIT	A	26	Claude Code