locus-audit

locus-audit is a skill for Claude Code, Codex from Nano-Nimbus/locus. It costs 77 tokens per session (702 once invoked), scanned A, original, MIT.

An experimental health check for a Locus memory palace, a structured collection used to store and retrieve information. It examines room sizes, session logs, retrieval depth, and feedback rates, then writes a report.

In plain words
What is it for?
Use it to audit the whole memory palace or one room and get a prioritised list of suggested actions. Results are advisory only.
Why use it?
It helps reveal when stored information or usage records have become difficult to manage or retrieve effectively.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to audit the whole memory palace or one room and get a prioritised list of suggested actions. Results are advisory only.

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Install with agentmods
npx agentmods add skills/nano-nimbus/locus/locus-audit
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 Nano-Nimbus/locus --skill locus-audit
Clone the repo
git clone --depth 1 https://github.com/Nano-Nimbus/locus

Made for: Claude Code, Codex.

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 locus-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/nano-nimbus/locus/locus-audit/github.svg)](https://agentmods.dev/skills/nano-nimbus/locus/locus-audit)
Your own site
<a href="https://agentmods.dev/skills/nano-nimbus/locus/locus-audit"><img src="https://agentmods.dev/badge/skills/nano-nimbus/locus/locus-audit/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 locus-audit

Your own site · 80×15
<a href="https://agentmods.dev/skills/nano-nimbus/locus/locus-audit"><img src="https://agentmods.dev/badge/skills/nano-nimbus/locus/locus-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 702 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 $0.00077 $0.00702
Opus 5 $0.00039 $0.00351
Sonnet 5 $0.00015 $0.00140
Haiku 4.5 $0.00008 $0.00070

Measured today against content hash cd5e60d38e2d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

locus-audit 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 today.

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/claude/locus-audit/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.

Locus Audit (Experimental)

Experimental. Results are advisory only.

Run a health audit on a Locus memory palace. Evaluates room sizes, session log accumulation, retrieval depth, and feedback rates. Produces a prioritised list of recommended actions and writes reports to _metrics/.

Usage: /locus-audit [room-path]

Arguments:

  • room-path (optional) — scope to a single room (e.g. projects/api-platform). Omit to audit the entire palace.

When to run

Run /locus-audit when:

  • Any room has accumulated 5+ session logs
  • A recent run had unexpectedly high retrieval depth
  • /locus-feedback fail has been used more than once recently
  • You haven't run an audit in more than 30 days

The locus skill will suggest running an audit when trigger conditions are met (see the audit algorithm at https://github.com/Nano-Nimbus/locus/blob/main/spec/audit-algorithm.md).


Steps

1. Identify palace root

Walk up from cwd looking for INDEX.md. If not found, report an error.

2. Run the audit

The size-limit half of the audit is also available without the CLI: locus lint --root <palace_root> reports every locus.size-limit violation in the palace. It does not score retrieval depth or feedback, so it complements the audit rather than replacing it.

Use the locus-audit CLI if available:

locus-audit --palace <palace_root> [--room <room-path>]

If the CLI is not installed, perform the audit manually:

  • Discover rooms (dirs with a matching <dir-name>.md main file)
  • Collect signals per room (line counts, session log count, mtime of oldest log)
  • Load _metrics/*.json for retrieval and feedback signals
  • Score each room per the audit algorithm linked above
  • Build the action items list

3. Report

Print the full markdown health report. Highlight:

  • Any critical rooms at the top
  • The prioritised action items list
  • The summary table

4. Write reports

Write _metrics/audit-<timestamp>.md and _metrics/audit-<timestamp>.json. Update _metrics/_last-audit.txt with the current timestamp.

Read the full file on GitHub · 95 lines

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. today Changed · +16 lines · +77 tokens per session cd5e60d38e2d
  2. 9d ago First seen · 79 lines · 0 tokens per session scan A c328293982f7

Subscribe to this mod's changes

locus-audit is a skill published in the GitHub repository Nano-Nimbus/locus (0 stars, last pushed yesterday), licensed MIT. It adds 77 tokens to every session and 702 once invoked, about $0.0004 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.

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