Osy#betaa language · its runtime Osyrin · a hosted platform
Why Osy#Built for agentsAgents as declarationsWorkflows that waitRuns exactly onceSecure by defaultNothing to mockThe editor is the compilerUI in the languageDocuments are dataOne program

Reference

Config

11 pages.

App configuration

The cross-cutting settings an app declares in one place — the app config object. Two kinds live here: the external providers and credentials your app…

MCP tool server (app.McpServer)

`app.McpServer` exposes your app to an MCP client (an AI agent) as a set of tools. Tools are grouped into named `Catalogs`, each gated by a…

OAuth clients (app.OAuthClients)

`app.OAuthClients` declares the third-party OAuth providers your app uses — for signing users in (Login) and for connecting to an external API on a…

UI surfaces (app.Ui)

`app.Ui` nominates the app's own components for the "system surfaces" the platform would otherwise render a bare fallback for — the connection-loss…

audit read access (app.Audit)

`app.Audit` configures the app's audit trails — WHO may read each one, and whether it is recorded at all. The platform keeps six trails on by default…

data classifications (app.Classifications)

Classifications map a data-sensitivity level (a `DataClass` — PII, Financial, Secret, …) to the `[Role]` members allowed to read fields marked at…

declaring secrets (app.Secrets)

`app.Secrets` declares the named secrets your app uses — API keys, tokens, client secrets. Each is `new Secret("Name")`, optionally `{ UserScoped =…

embedding provider (app.Embedding)

`app.Embedding` declares the embedding model the app uses to turn text into vectors for semantic search over `[Searchable]` fields (see…

identifier patterns (app.Memory)

`app.Memory` tells search what an identifier looks like in YOUR data — an order number, a part code, an SKU. Search already spots identifier-shaped…

per-environment config (app.Config)

`app.Config` declares your app's per-environment settings — values that differ between development and production, like an invite base URL or a…

workflow run retention (app.Workflow)

`app.Workflow` declares how long the app keeps FINISHED workflow runs. Without it a completed run is kept for ever, along with everything it owns —…