Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/skyciv/skyciv-ai-skillsnpx agentmods add skills/skyciv/skyciv-ai-skills/foundation-apiWrote 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/skyciv/skyciv-ai-skills/foundation-api)<a href="https://agentmods.dev/skills/skyciv/skyciv-ai-skills/foundation-api"><img src="https://agentmods.dev/badge/skills/skyciv/skyciv-ai-skills/foundation-api/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/skyciv/skyciv-ai-skills/foundation-api"><img src="https://agentmods.dev/badge/skills/skyciv/skyciv-ai-skills/foundation-api.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 | $0.00177 | $0.01345 |
| Opus 5.5 | $0.00071 | $0.00538 |
| Sonnet 5.5 | $0.00035 | $0.00269 |
| Haiku 4.5 | $0.00018 | $0.00135 |
Grade A, and why
foundation-api 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 17d 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 — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Foundation Design API (piles)
Design and check reinforced concrete piles with the SkyCiv Foundation module via the standalone.foundation API.
Prerequisite: start the session with
standalone.foundation.start, notS3D.session.start. See theskyciv-api-v3skill for auth,optionsand the request/response envelope. If you also need an S3D model (e.g. to get column reactions), run that in a separate session.
Only piles are supported through the API at the moment. Pad footings (isolated_foundation) and combined
footings (combined_foundation) are not: don't send them; tell the user instead.
Request
{
"auth": { "username": "...", "key": "..." },
"options": { "validate_input": true },
"functions": [
{ "function": "standalone.foundation.start", "arguments": { "keep_open": false } },
{ "function": "standalone.foundation.check", "arguments": { "1": { "settings": { "...": "..." } } } }
]
}
arguments holds the foundations keyed by ID ("1", "2", ...).
Use the input format of the samples in assets/. Don't add settings.version, and don't send a
file exported from the current Foundation Designer as it is: those calls time out or never return.
Set options.validate_input: true so bad keys and values come back as clear error messages before the design runs.
Supported piles
settings.type |
settings.code |
settings.units |
|---|---|---|
piles_foundation |
ACI_318_2014 |
metric, imperial |
AS_3600_2018, EN |
metric |
Loads
loads is keyed by column ID ("1"). It holds the load cases for the code, each with axial, shear_x,
shear_z (kN / kip) and moment_x, moment_z (kN-m / kip-ft):
| Code | Load case keys |
|---|---|
| ACI | DL, LL, W, E, LR, RL, SL |
| AS 3600 | G, Q, Wu, Eu, Su |
| EN | G, Ql, Qw, Qe, Qs, Qt |
Custom loads
To give factored and service loads directly, set parameters.others.custom_load: true and use:
What ships with it
4 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.
- 17d ago First seen · 97 lines · 177 tokens per session scan A 8759017525b1
foundation-api is a skill published in the GitHub repository skyciv/skyciv-ai-skills (11 stars, last pushed 15d ago), licensed MIT. It adds 177 tokens to every session and 1,345 once invoked, about $0.0007 per session on Opus 5.5. 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 2026-10-13.
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