A code-hygiene and technical due-diligence workflow that runs tools and applies judgement to their findings. It checks code quality, security, dependencies, dead code, tests, types, and other repository health concerns.

Use it to audit or review a codebase, check dependencies and licences, find security issues and dead code, triage linters and type errors, and assess tests and design.

It helps separate real problems from noisy tool output and limits changes to fixes that have been reviewed and approved.

How saski/arnesto configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to saski/arnesto. 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/saski/arnesto/main/.agents/skills/lustra/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/saski/arnesto

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/saski/arnesto/lustra.svg)](https://agentmods.dev/skills/saski/arnesto/lustra)

Your own site

<a href="https://agentmods.dev/skills/saski/arnesto/lustra"><img src="https://agentmods.dev/badge/skills/saski/arnesto/lustra.svg" alt="Measured on agentmods" height="20"></a>

Per session 258 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,439 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	$0.00258	$0.01439
Opus 5	$0.00129	$0.00720
Sonnet 5	$0.00052	$0.00288
Haiku 4.5	$0.00026	$0.00144

Measured 3d ago against content hash 74f6e187528f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

lustra 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 3d 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.

.agents/skills/lustra/SKILL.md · 99 lines

How it starts

The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Lustra

Lustra wraps real code-hygiene tooling and applies judgment on top of it. It does not guess where a tool would. It runs the tool, filters false positives, ranks what matters, and applies only the changes the user approves.

Dispatch

$1 is the command. $2 and beyond are the target (a path or glob). When no target is given, default to the whole repository.

If $1 is empty or help, print the command list below and stop.
Otherwise read ${CLAUDE_SKILL_DIR}/reference/$1.md and follow it exactly, scoped to the target. If reference/$1.md does not exist, say so and print the command list.

Commands

Grouped by lifecycle phase. audit runs the diagnostic ones together.

Assess / start

audit — meta-command: one graded health report across every dimension (due diligence).
baseline — scaffold the guardrail configs a project should have, for the detected stack.

Iterate

review — structured correctness / design / slop review of a diff or path.
types — type-checker triage; catch any/@ts-ignore-style evasion.
tests — run the suite, coverage on the diff, catch fake/empty tests.
analyze — the linter's findings plus AI-slop smells that no rule catches.
format — formatting drift, fixed mechanically.

Polish

security — vulnerabilities: secrets, injection, broken authorization, vulnerable deps.
license — dependency license compatibility and IP risk.
deadcode — unused files, exports, and dependencies; deletes only what is confirmed.
deps — dependency health and upgrades: outdated, deprecated, duplicated. Reports unused deps and advisories but defers deletion to deadcode and vuln fixes to security.
design — module/package design quality: SOLID, or cohesion/coupling/composition for non-OO stacks. Module-scoped, unlike diff-scoped review or layout-scoped structure.
observability — logging and instrumentation quality so failures are diagnosable.
perf — performance smells: N+1, blocking IO, unbounded growth, bundle weight.
docs — documentation drift and undocumented public surface.

Read the full file on GitHub · 99 lines

Files

What ships with it

18 files 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.

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.

3d ago First seen · 99 lines · 258 tokens per session scan A 74f6e187528f

Subscribe to this mod's changes

lustra is a skill published in the GitHub repository saski/arnesto (5 stars, last pushed today), licensed Unlicense. It adds 258 tokens to every session and 1,439 once invoked, about $0.0013 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 2026-09-03.

Debugging Security agent-harness ai-agents coding-agents

runtime-evidence-and-tracing

Use when connecting observed behavior, logs, metrics, request IDs, run IDs, screenshots, traces, external dependency results, or artifacts into a runtime evidence loop.

yfge/agent-harness-skills · 39 tokens

html-ppt-zhangzara-block-frame

Rescuing a messy startup deck into a board-grade system — the diagnosis, the page grammar, and the rebuilt proof pages. Built as a decision-grade design craft deck for founders, exec presenter.

nexu-io/open-design · 51 tokens

build-test

Run the project's build / typecheck / lint / test commands and emit the build.passing + tests.passing signals devloop convergence reads.

nexu-io/open-design · 31 tokens

doca-flow

Build and debug DOCA Flow applications on supported NVIDIA NICs/DPUs: define match/action pipes, initialize ports and representors, choose forwarding targets, validate pipes before hardware programming, read counters, match the Flow version to the installed DOCA release, and diagnose Flow API errors. Trigger on DOCA…

NVIDIA/skills · 140 tokens

mcore-create-issue

Investigate a failing GitHub Actions run or job and create a GitHub issue for the failure.

NVIDIA/skills · 26 tokens

doca-dpa-hl-tracer

Use this skill when the user runs docadpahltracer to capture/decode DPA-side traces at the programming-events layer (kernel entry/exit, sync points, comm primitive calls, RDMA WR submission, completion drain) — picking TRACE vs CRIT, tuning the JSON config (file-size limits + filesizelimitpolicy, thread…

NVIDIA/skills · 242 tokens

arnesto: Skill for Claude Code