Borrowing it
Nothing to install: this file belongs to geleynse/gantry. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/geleynse/gantry/main/.claude/skills/add-v2-action/SKILL.mdgit clone --depth 1 https://github.com/geleynse/gantryWrote 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/geleynse/gantry/add-v2-action)<a href="https://agentmods.dev/skills/geleynse/gantry/add-v2-action"><img src="https://agentmods.dev/badge/skills/geleynse/gantry/add-v2-action/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/geleynse/gantry/add-v2-action"><img src="https://agentmods.dev/badge/skills/geleynse/gantry/add-v2-action.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 | $0.00078 | $0.03623 |
| Opus 5 | $0.00039 | $0.01811 |
| Sonnet 5 | $0.00016 | $0.00725 |
| Haiku 4.5 | $0.00008 | $0.00362 |
Grade A, and why
add-v2-action 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 10d 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 — 236 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Adding a v2 Action — Gantry Server
1. The dispatch model
v2 consolidates the game's tools into a handful of namespaced MCP tools —
spacemolt (default/core gameplay), spacemolt_market, spacemolt_catalog,
spacemolt_storage, spacemolt_battle, spacemolt_salvage, spacemolt_ship,
spacemolt_social, spacemolt_facility, spacemolt_faction, spacemolt_auth
(login/logout only, intercepted separately) — instead of 60+ individually
named v1 tools. Each namespaced tool takes an action string param (or, for
spacemolt_catalog, a type param) that selects the behavior:
spacemolt(action="jump", id="sirius"),
spacemolt_storage(action="deposit", item_id="iron_ore", qty=10).
Stale doc warning: AGENTS.md says "6 namespaces." The actual v1→v2
alias table (V1_TO_V2_DISPATCH in server/src/proxy/dispatch-v1-to-v2.ts)
covers 9 distinct spacemolt_* tool names, and the live namespace count
isn't fixed by gantry code at all — createGantryServerV2() registers
whatever tool names the live game server advertises
(shared.v2Tools, fetched per-preset in schema.ts). Don't cite a namespace
count — grep V1_TO_V2_DISPATCH, or check the running server's GET /health
(tools_v2 count, v2_presets list) for the live figures.
Most namespaced tools' action param is a bare string with no enum —
withPrayerScriptSchema() in gantry-v2.ts notes this explicitly for
spacemolt: "client-side Zod accepts any string... proxy actions validate
without enum injection." That means adding a new action usually requires
zero schema changes, just a dispatch branch. The one namespace that does
enum-constrain its dispatch key is spacemolt_catalog (type has a real
enum) — see §5.
2. Which of three categories are you adding?
A. Proxy-computed helper action (no game-server round trip). The action
is answered entirely from gantry's own state (SQLite, in-memory caches,
computed from existing data) — e.g. find_local_route, find_item_market,
recent_snapshot, snapshot_coverage, craft_chains, arbitrage_routes.
This is the pattern demonstrated by the canonical example commit — see §3.
You add an if (action === "your_action") { ... return textResult(...); }
branch inside the big per-tool dispatch chain in createGantryServerV2()
(server/src/proxy/gantry-v2.ts).
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.
- 10d ago First seen · 236 lines · 78 tokens per session scan A 1497806b9468
add-v2-action is a skill published in the GitHub repository geleynse/gantry (3 stars, last pushed 4d ago), licensed MIT. It adds 78 tokens to every session and 3,623 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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