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 t3chnaztea/batocera-skills --skill batocera-romsgit clone --depth 1 https://github.com/t3chnaztea/batocera-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/t3chnaztea/batocera-skills/batocera-roms)<a href="https://agentmods.dev/skills/t3chnaztea/batocera-skills/batocera-roms"><img src="https://agentmods.dev/badge/skills/t3chnaztea/batocera-skills/batocera-roms/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/t3chnaztea/batocera-skills/batocera-roms"><img src="https://agentmods.dev/badge/skills/t3chnaztea/batocera-skills/batocera-roms.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00155 | $0.01806 |
| Opus 5 | $0.00077 | $0.00903 |
| Sonnet 5 | $0.00031 | $0.00361 |
| Haiku 4.5 | $0.00015 | $0.00181 |
Grade A, and why
batocera-roms scanned grade A with 1 finding 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 11d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
`curl -s http://127.0.0.1:1234/systems/<system>/games` and count How it starts
The opening of the file, as written. The whole thing — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Batocera ROMs
Managing the game library: where ROMs live, why they do or don't show up, how to
curate a big collection without deleting anything, and how to verify dumps.
Assumes the connection pattern and safety doctrine from batocera-ops.
System directories
ROMs live in /userdata/roms/<system>/, one directory per system. The directory
name is Batocera's internal system name, which is not always the obvious
one. Don't guess — look it up on the box:
# Every system Batocera knows, with its dir name and display name:
SSHB "grep -E '<name>|<fullname>' /usr/share/emulationstation/es_systems.cfg"
# What you actually have ROMs for:
SSHB "ls /userdata/roms/"
Names that trip people up: Cave CV1000 arcade lives in cave3rd (not
cv1000); Odyssey 2 is odyssey2 (renamed from o2em); Half-Life is
halflife (renamed from xash3d_fwgs). Directory renames across versions are
common — the batocera-maintenance migration reference lists the ones that bite.
Why a game doesn't appear
In rough order of likelihood:
- Wrong extension for that system. Each system accepts a fixed set of
extensions; a file with any other extension is invisible to ES. Check the
accepted list:
SSHB "grep -A2 '<system>' /usr/share/emulationstation/es_systems.cfg | grep extension". A bare.binis a frequent offender — for many disc systems.binis not an ES extension (you need a.cueor.chd). - It's hidden.
<hidden>true</hidden>ingamelist.xml, or its whole system is in the ES HiddenSystems list. Hidden games still exist on disk — this is a feature, see curation below. - Extensionless ROM inside a zip. ES lists the
.zip, but the emulator refuses to load it because the inner file has no recognizable extension. See the formats reference — this fails silently (RetroArch exits ~1s, status 1, "Could not read content file"). - A custom system-list file overrode the stock list. If a whole swath of
systems vanished, suspect
es_systems_custom.cfg— see the landmine below.
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.
- 11d ago First seen · 146 lines · 155 tokens per session scan A 66e4a50cf0cf
batocera-roms is a skill published in the GitHub repository t3chnaztea/batocera-skills (4 stars, last pushed 19d ago), licensed MIT. It adds 155 tokens to every session and 1,806 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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