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 wahidyankf/ose-public --skill programming-fsharpgit clone --depth 1 https://github.com/wahidyankf/ose-publicWrote 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/wahidyankf/ose-public/programming-fsharp)<a href="https://agentmods.dev/skills/wahidyankf/ose-public/programming-fsharp"><img src="https://agentmods.dev/badge/skills/wahidyankf/ose-public/programming-fsharp/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/wahidyankf/ose-public/programming-fsharp"><img src="https://agentmods.dev/badge/skills/wahidyankf/ose-public/programming-fsharp.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 | $0.00053 | $0.01086 |
| Opus 5.5 | $0.00021 | $0.00434 |
| Sonnet 5.5 | $0.00011 | $0.00217 |
| Haiku 4.5 | $0.00005 | $0.00109 |
Grade A, and why
programming-fsharp 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 2d 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 — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.
F# Programming
Every F# rule is owned by F# Standards. Test-Driven Development and Test Boundaries and Gates govern tests and gates, Red, Green, Refactor runs each cycle, and Developing Applications carries the judgement on layers, errors, logs, and input that holds in every language. This skill adds only the procedure and judgement of applying them in F#. Where a sentence here seems to state a rule, the standard decides.
Start From What the Project Records
Read the web and test framework choices recorded under the standard's adopter decision. When the change needs one that is not recorded, raise it as a decision: picking one quietly decides it for every later change too.
Run the formatter check, the build, and the unit target on the untouched tree. A gate already failing before any edit is handled under Preexisting Error Resolution.
Place the File Before Writing It
A new file enters the compile list at the point where everything it uses sits above it and nothing above it needs it. When no such point exists, the design is asking a question:
| Symptom | Usual answer |
|---|---|
| a type it needs is defined further down | the type is shared; move it up beside the other contracts |
| a function further up needs to call it | pass that behaviour in as a function parameter, so the dependency points one way |
| two files each need something in the other | one concept split in two, or an abstraction missing; merge or extract first |
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.
- 2d ago First seen · 89 lines · 53 tokens per session scan A 7845e5b1e3d0
programming-fsharp is a skill published in the GitHub repository wahidyankf/ose-public (12 stars, last pushed today), licensed MIT. It adds 53 tokens to every session and 1,086 once invoked, about $0.0002 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 2026-10-14.
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