Borrowing it
Nothing to install: this file belongs to solana-foundation/solana-developer-platform. 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/solana-foundation/solana-developer-platform/main/.agents/skills/rail-discovery/SKILL.mdgit clone --depth 1 https://github.com/solana-foundation/solana-developer-platformWrote 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/solana-foundation/solana-developer-platform/rail-discovery)<a href="https://agentmods.dev/skills/solana-foundation/solana-developer-platform/rail-discovery"><img src="https://agentmods.dev/badge/skills/solana-foundation/solana-developer-platform/rail-discovery/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/solana-foundation/solana-developer-platform/rail-discovery"><img src="https://agentmods.dev/badge/skills/solana-foundation/solana-developer-platform/rail-discovery.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 | $0.00042 | $0.01962 |
| Opus 5 | $0.00021 | $0.00981 |
| Sonnet 5 | $0.00008 | $0.00392 |
| Haiku 4.5 | $0.00004 | $0.00196 |
Grade A, and why
rail-discovery 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 5d 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 — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Rail discovery
The platform serves a generated support matrix — which (fiat, crypto) pairs each provider can on/off-ramp — from packages/sdp-types/src/generated/ramp.generated.ts (ONRAMP_SUPPORT, OFFRAMP_SUPPORT, RAMP_FIAT_CURRENCIES). You do not hand-edit that file. You teach your provider to report its rails, then a script distills live provider responses into a committed per-provider snapshot and merges every provider's snapshot into the matrix.
Implement rail support in packages/sdp-payments; the codegen (apps/sdp-api/scripts/ramp-support.ts) owns snapshots and the generated matrix. Choose one source:
- Upstream discovery API: add
RAMP_RAIL_DUMPS.<id>inpackages/sdp-payments/src/ramps/shared.ts;_discoverRailswrites raw responses;distillRailSupportreads and normalizes them. - No discovery API: make
_discoverRailsa no-op and return an explicit, tested snapshot fromdistillRailSupport. Do not invent a network endpoint or dump.
Both paths declare <PROVIDER>_DECLARED_RAIL_SUPPORT for entity types and country support not discovered in the snapshot. Reference the existing providers under packages/sdp-payments/src/ramps/providers/ — single-dump, multi-endpoint, discovered-country-support, and static-support variants are all represented.
The data flow
_discoverRails ──fetch──▶ .ramp-support/raw/<id>/*.json (gitignored raw dumps)
distillRailSupport ──parse──▶ .ramp-support/<id>.currency.json (committed snapshot)
ramp-support:generate ──merge snapshots + declared consts──▶ ramp.generated.ts (committed)
Raw dumps under .ramp-support/raw/ are gitignored — network scratch, safe to delete and re-fetch. The snapshot (.ramp-support/<id>.currency.json) and the generated .ts are both committed and must be regenerated together when your support changes.
Step 1 — choose the source
For discovery-backed support, add an entry to RAMP_RAIL_DUMPS in packages/sdp-payments/src/ramps/shared.ts, one per upstream response:
What ships with it
1 file 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.
- 5d ago Changed 3ebae1f18fa6
- 9d ago First seen · 140 lines · 42 tokens per session scan A 0b2c7bb48e01
rail-discovery is a skill published in the GitHub repository solana-foundation/solana-developer-platform (52 stars, last pushed today), licensed MIT. It adds 42 tokens to every session and 1,962 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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