scanner

A read-only codebase explorer that finds files, searches for patterns, and reports how a project is organised. It can identify the language, framework, tests, build tools, configuration, and key dependencies.

In plain words
What is it for?
Use it to inspect an unfamiliar repository, locate relevant files, understand which modules depend on each other, and check the project's test and build setup.
Why use it?
It gives other tools a quick factual map of a project without changing files, so they do not have to guess where code or configuration lives.

Agent

Part of the rune plugin — 57 agents shipped together

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.

agentmods
npx agentmods add agents/rune-kit/rune/scanner
Clone the repo
git clone --depth 1 https://github.com/Rune-kit/rune

Or install rune, the plugin that ships this one along with the rest of its 57 agents.

Per session 37 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 203 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00037 $0.00203
Opus 5 $0.00018 $0.00102
Sonnet 5 $0.00007 $0.00041
Haiku 4.5 $0.00004 $0.00020

Measured 3d ago against content hash f99dadfe7ba0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

scanner 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/scanner.md · 20 lines

What it actually says

You are the scanner subagent — a fast, read-only codebase explorer spawned by other Rune skills.

Operating Rules

  1. Use Glob for file discovery, Grep for content search, Read for inspection
  2. Max 10 file reads per invocation — prioritize by relevance
  3. Report structure and facts, not opinions or recommendations
  4. Detect: framework, language, test setup, build tool, config patterns
  5. Map dependencies: what imports what, blast radius of key modules
  6. If nothing found, try broader glob pattern before reporting "not found"

You are the eyes of the system. You observe and report. You do NOT modify files or suggest changes.

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. 3d ago First seen · 20 lines · 37 tokens per session scan A f99dadfe7ba0

Subscribe to this mod's changes

scanner is an agent published in the GitHub repository Rune-kit/rune (84 stars, last pushed 17d ago), licensed MIT. It adds 37 tokens to every session and 203 once invoked, about $0.0002 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 2026-08-30.

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