drift-review

drift-review is a skill for Claude Code from chrbailey/promptspeak-mcp-server. It costs 26 tokens per session (382 once invoked), scanned A, original, MIT.

A review workflow for checking whether AI agents are changing their behaviour over time.

In plain words
What is it for?
Use it to inspect agent status and drift history, summarize trends, and recommend monitoring, recalibration, or halting an agent.
Why use it?
It helps spot unusual changes in an agent’s goals, tool use, or confidence before they cause problems.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the promptspeak plugin — 3 skills, 1 MCP server shipped together

Good fit Use it to inspect agent status and drift history, summarize trends, and recommend monitoring, recalibration, or halting an agent.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/chrbailey/promptspeak-mcp-server/drift-review
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.

Any agent
npx skills add chrbailey/promptspeak-mcp-server --skill drift-review
Clone the repo
git clone --depth 1 https://github.com/chrbailey/promptspeak-mcp-server

Made for: Claude Code.

Or install promptspeak, the plugin that ships this one along with the rest of its 3 skills, 1 MCP server.

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 drift-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/chrbailey/promptspeak-mcp-server/drift-review/github.svg)](https://agentmods.dev/skills/chrbailey/promptspeak-mcp-server/drift-review)
Your own site
<a href="https://agentmods.dev/skills/chrbailey/promptspeak-mcp-server/drift-review"><img src="https://agentmods.dev/badge/skills/chrbailey/promptspeak-mcp-server/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.

agentmods 80×15 button for drift-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/chrbailey/promptspeak-mcp-server/drift-review"><img src="https://agentmods.dev/badge/skills/chrbailey/promptspeak-mcp-server/drift-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 382 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 $0.00382
Opus 5 $0.00013 $0.00191
Sonnet 5 $0.00005 $0.00076
Haiku 4.5 $0.00003 $0.00038

Measured 10d ago against content hash 5ff833bf4c6a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, 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 10d 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.

skills/drift-review/SKILL.md · 39 lines

What it actually says

Drift Review — PromptSpeak Governance

You are conducting a behavioral drift review across governed agents.

Workflow

  1. Get system overview — Call ps_state_system to see all agents, their circuit breaker status, and drift metrics.
  2. For each agent with drift above baseline:
    • Call ps_state_drift_history with the agent ID
    • Identify the drift trend (increasing, stable, decreasing)
    • Note which dimensions are drifting (goal displacement, tool usage patterns, confidence shifts)
  3. Present findings as a dashboard:
Agent: [agent_id]
  Status: [circuit breaker state]
  Drift: [current drift score] (baseline: [baseline])
  Trend: [↑ increasing / → stable / ↓ decreasing]
  Top concern: [most drifted dimension]
  1. Recommend actions based on severity:
    • Low drift (< 0.3 above baseline): Monitor, no action needed
    • Medium drift (0.3–0.7 above baseline): Suggest recalibrating baseline with ps_state_reset
    • High drift (> 0.7 above baseline): Recommend halting agent with ps_state_halt until root cause is identified
  2. If the user wants to act, execute the recommended tools.

Guidelines

  • Always show data before recommending actions.
  • Drift is not inherently bad — agents learning new tasks will drift. Context matters.
  • Check audit logs with ps_audit_get if the user wants to understand what caused the drift.
  • A halted agent (circuit breaker open) should be investigated before resuming with ps_state_resume.
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. 10d ago First seen · 39 lines · 26 tokens per session scan A 5ff833bf4c6a

Subscribe to this mod's changes

drift-review is a skill published in the GitHub repository chrbailey/promptspeak-mcp-server (1 stars, last pushed 2mo ago), licensed MIT. It adds 26 tokens to every session and 382 once invoked, about $0.0001 per session on Opus 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.