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.
npx skills add magnus919/agent-skills --skill lastfmgit clone --depth 1 https://github.com/magnus919/agent-skillsWrote 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.
[](https://agentmods.dev/skills/magnus919/agent-skills/lastfm)<a href="https://agentmods.dev/skills/magnus919/agent-skills/lastfm"><img src="https://agentmods.dev/badge/skills/magnus919/agent-skills/lastfm/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.
<a href="https://agentmods.dev/skills/magnus919/agent-skills/lastfm"><img src="https://agentmods.dev/badge/skills/magnus919/agent-skills/lastfm.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00103 | $0.02257 |
| Opus 5 | $0.00051 | $0.01128 |
| Sonnet 5 | $0.00021 | $0.00451 |
| Haiku 4.5 | $0.00010 | $0.00226 |
Grade A, and why
lastfm 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Last.fm
Setup
export LASTFM_API_KEY="your_api_key_here"
# For write operations only:
export LASTFM_API_SECRET="your_api_secret"
export LASTFM_SESSION_KEY="your_session_key"
Get an API key at https://www.last.fm/api/account/create (free, requires a Last.fm account).
Essential Commands
User queries — "what am I listening to"
Configurable via LASTFM_USERNAME env var. Defaults to <username> if unset.
lastfm-cli user info <username> # Profile + stats
lastfm-cli user recent-tracks <username> --limit 10 # Recent listening
lastfm-cli user top-artists <username> --period 7day # Weekly top artists
lastfm-cli user top-tracks <username> --period overall # All-time faves
lastfm-cli user loved-tracks <username> # Loved tracks
lastfm-cli user friends <username> # Social graph
lastfm-cli user weekly-charts <username> # Available chart periods
Music Discovery — "what's similar to X"
lastfm-cli artist similar <artist> --limit 10 # Taste graph neighbors
lastfm-cli artist info <artist> # Bio, stats, tags
lastfm-cli artist top-tracks <artist> # Their most popular
lastfm-cli track similar <artist> "<track>" # Track-level similarity
lastfm-cli album info <artist> "<album>" # Tracklist, metadata
lastfm-cli tag top-artists <tag> # Genre browsing
Charts — "what's popular"
lastfm-cli chart top-artists --limit 20 # Global
lastfm-cli geo top-artists "Japan" --limit 20 # Per-country
lastfm-cli geo top-tracks "Germany" --limit 20
lastfm-cli tag top-tracks "electronic" --limit 15 # By genre tag
Search — "find that thing"
lastfm-cli artist search "Radiohead" # Find by name
lastfm-cli album search "OK Computer" # Find albums
lastfm-cli track search "Karma Police" # Find tracks
What ships with it
5 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.
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.
- 9d ago First seen · 187 lines · 103 tokens per session scan A 0a5d4823b47e
lastfm is a skill published in the GitHub repository magnus919/agent-skills (76 stars, last pushed yesterday), licensed MIT. It adds 103 tokens to every session and 2,257 once invoked, about $0.0005 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.
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