A development skill that checks the ralphctl project’s agent files and documentation against the actual source code. It looks for stale versions, dead paths, removed names, missing environment variables, and made-up references.

Use it to audit or refresh `.claude/` files and `CLAUDE.md`, especially before releases or after moving, renaming, or removing source-code items.

Agent instructions can quietly become outdated as code changes, causing later sessions to follow paths or rules that no longer exist.

How lukas-grigis/ralphctl configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to lukas-grigis/ralphctl. 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/lukas-grigis/ralphctl/main/.claude/skills/drift-sweep/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/lukas-grigis/ralphctl

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/lukas-grigis/ralphctl/drift-sweep/github.svg)](https://agentmods.dev/skills/lukas-grigis/ralphctl/drift-sweep)

Your own site

<a href="https://agentmods.dev/skills/lukas-grigis/ralphctl/drift-sweep"><img src="https://agentmods.dev/badge/skills/lukas-grigis/ralphctl/drift-sweep/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/skills/lukas-grigis/ralphctl/drift-sweep"><img src="https://agentmods.dev/badge/skills/lukas-grigis/ralphctl/drift-sweep.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 181 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,571 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. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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	$0.00181	$0.01571
Opus 5.5	$0.00072	$0.00628
Sonnet 5.5	$0.00036	$0.00314
Haiku 4.5	$0.00018	$0.00157

Measured 1mo ago against content hash fa9bdc966a03, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

drift-sweep 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.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/sweep.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.claude/skills/drift-sweep/SKILL.md · 95 lines

How it starts

The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Drift Sweep

The .claude/ agent and doc files mirror the shape of src/ — module paths, symbol names, env vars, command names, version numbers. The code moves every day; these mirrors do not move with it unless someone makes them. The result is silent drift: an agent confidently points the next session at runtime/mount.tsx (deleted), a doc cites RALPHCTL_JSON (never shipped), every agent hardcodes v0.7.0 while the repo is at 0.12.x. None of it fails a test, so nothing catches it — until a session follows a dead pointer and wastes a turn, or a contributor trusts a stale acceptance criterion.

This skill is the cheap, repeatable counter-pressure: a mechanical sweep that surfaces candidates, followed by judgement to confirm them. It is deliberately conservative — a false "this is drift" wastes a fix; a missed one rots quietly. So the script flags, and you verify.

When this earns its keep

Someone asks to audit, refresh, or clean up .claude/ or CLAUDE.md.
Before a release — stale version stamps and dead paths shipping in docs is avoidable.
Right after a rename/move under src/ (a sibling renamed, a file relocated, a symbol dropped) — the agent and doc files that named the old shape are now wrong.

How to run it

Run the sweep harness to get the candidate list:
```
bash .claude/skills/drift-sweep/scripts/sweep.sh
```
It scans CLAUDE.md, .claude/agents/, .claude/docs/, and .claude/skills/ (markdown only) and prints candidates grouped into five buckets:
- [1] Version stamps — every vX.Y.Z vs package.json. Noise is expected here: external tool versions (Claude Code, Copilot CLI) and historical migration notes (v0.6.x → …) are legitimately pinned. A bare current-feature stamp like v0.7.0 in a "this is how it works today" sentence is the real target.
- [2] Missing paths — referenced src/, tests/, scripts/ files/dirs that no longer exist. Highest signal; a gone path is almost always real drift.
- [3] Unread env vars — RALPHCTL_* named in docs with zero non-test reads in src/ (unshipped or removed).
- [4] Known stale patterns — recurring renames (tests/integration/flows/ → …/application/flows/, the signals/ → contract/ sibling rename, runtime/mount.tsx, InkPromptAdapter, PromptPort).
- [5] Symbol sample — backticked identifiers to spot-check; too noisy to auto-resolve, so pick the load-bearing ones and grep them yourself.

Read the full file on GitHub · 95 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

scripts/sweep.sh 4.7 KB runs code

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.

1mo ago Changed fa9bdc966a03
2mo ago First seen · 95 lines · 181 tokens per session scan A ac860cf3f165

Subscribe to this mod's changes

drift-sweep is a skill published in the GitHub repository lukas-grigis/ralphctl (24 stars, last pushed 4d ago), licensed MIT. It adds 181 tokens to every session and 1,571 once invoked, about $0.0007 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.

Building agents Debugging anthropic claude cli copilot developer-tools task-management

drift-sweep next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
drift-sweeplukas-grigis/ralphctl	Skill	24	4d ago	MIT	A	181	Claude Code
atomic-debugdamusix/atomic-claude	Skill	115	5d ago	MIT	A	114	Claude Code, Codex
sipcode-regressAnuj7411/sipcode	Skill	46	21d ago	MIT	A	105	Claude Code
debug-my-harnesszernie/vigiles	Skill	15	4d ago	MIT	A	114	Claude Code
linter-docszernie/vigiles	Skill	15	4d ago	MIT	A	125	Claude Code
system-healthrandomittin/heimdall	Skill	5	16d ago	MIT	A	102	Claude Code
sonar-manage-findingsNick2bad4u/SonarCloud-Skill	Skill	2	6d ago	Unlicense	A	46	Codex

ralphctl: Skill for Claude Code