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 avsm/ocaml-claude-marketplace --skill resultgit clone --depth 1 https://github.com/avsm/ocaml-claude-marketplaceWrote 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/avsm/ocaml-claude-marketplace/result)<a href="https://agentmods.dev/skills/avsm/ocaml-claude-marketplace/result"><img src="https://agentmods.dev/badge/skills/avsm/ocaml-claude-marketplace/result/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/avsm/ocaml-claude-marketplace/result"><img src="https://agentmods.dev/badge/skills/avsm/ocaml-claude-marketplace/result.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 | $0.00064 | $0.00397 |
| Opus 5 | $0.00032 | $0.00198 |
| Sonnet 5 | $0.00013 | $0.00079 |
| Haiku 4.5 | $0.00006 | $0.00040 |
Grade A, and why
result 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 12d 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.
What it actually says
OCaml Result Patterns
OCaml 5.x provides Result.Syntax for monadic chaining and Result.get_ok/Result.get_error for extraction.
Result.Syntax
Use open Result.Syntax to get let* and let+ bindings:
open Result.Syntax
let process request =
let* req = validate request in
let* auth = authenticate req in
let* _ = authorize auth in
execute req
DO NOT define local let ( let* ) = Result.bind. Use open Result.Syntax instead.
Extracting Values
| Function | Behavior on Error |
|---|---|
Result.get_ok r |
Raises Invalid_argument |
Result.get_error r |
Raises Invalid_argument |
Result.value r ~default |
Returns default |
Use Result.get_ok only when failure is a programming error:
(* Startup/config - crash on failure is intentional *)
let config = Result.get_ok (Config.load ())
(* Test setup - failure means test bug *)
let client = Result.get_ok (Tls.Config.client ~authenticator ())
Custom get_ok
Only define custom get_ok when you need different exception behavior:
(* Raises domain-specific Protocol_error instead of Invalid_argument *)
let get_ok = function
| Ok x -> x
| Error e -> raise (Protocol_error e)
If you just want Invalid_argument, use Result.get_ok directly.
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.
- 12d ago First seen · 56 lines · 64 tokens per session scan A 94af8dbb2798
result is a skill published in the GitHub repository avsm/ocaml-claude-marketplace (35 stars, last pushed 9d ago), licensed ISC. It adds 64 tokens to every session and 397 once invoked, about $0.0003 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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