> ## Documentation Index > Fetch the complete documentation index at: https://docs.solved.gg/llms.txt > Use this file to discover all available pages before exploring further. # Deno-exclusive inventory > Catalog of Deno APIs that Bun and Node do not ship as first-class runtime surfaces. # Deno-exclusive inventory Inclusion rule: > Native in Deno **and** not first-class in Node **and** not first-class in Bun. Many Deno I/O methods **overlap conceptually** with Node/`Bun` file APIs. I3 still includes the **`Deno.*` namespace shapes** when the product goal is Deno-shaped source compatibility — but marks rows that are “shape-only wrappers over shared host” as such. Every row carries a **Kind** so the exception stays enforceable: * `exclusive` — no first-class Node **or** Bun equivalent (e.g. permissions, KV). * `shape-only` — a Deno-shaped wrapper over a capability that is already shared host work (e.g. FS, core runtime info); tracked for source compatibility, not counted as a net-new capability. **Pin:** [Sources](/scripty/v0.0.1-dev/reference/sources). ## Permissions (high priority exclusive) | API | Kind | Why exclusive | Notes | | ------------------------------------------------------------------------------------------------------------------------------------ | ----------- | --------------------------------------- | ------------------------------------------------------------------------------------- | | CLI permission flags (`--allow-read`, `--allow-write`, `--allow-net`, `--allow-env`, `--allow-run`, `--allow-ffi`, `--allow-sys`, …) | `exclusive` | Deno security model | Map to scripty capability host | | Permission sets in config | `exclusive` | Deno 2.x feature | Align with config story | | `Deno.permissions.query` | `exclusive` | Runtime permission API | — | | `Deno.permissions.request` | `exclusive` | Interactive / programmatic grant | Embed may no-op or policy-hook | | `Deno.permissions.revoke` | `exclusive` | Revocation | — | | `Deno.PermissionStatus` / descriptors | `exclusive` | Types + events | — | | Path permission interactions (`Deno.cwd`, relative-path resolution) | `exclusive` | Permission model applies to path access | Resolve relative paths against cwd, then check `--allow-read` / `--allow-write` scope | ## `Deno` namespace — core runtime | API | Kind | Why exclusive / Deno-shaped | Notes | | ------------------------------------------------------------------------------------------------------- | ------------ | --------------------------- | ------------------------------------------- | | `Deno.args` | `shape-only` | Deno global shape | Overlaps `process.argv` | | `Deno.mainModule` | `shape-only` | Deno entry URL | — | | `Deno.noColor` | `shape-only` | Deno flag | — | | `Deno.pid` / `Deno.ppid` | `shape-only` | Namespace shape | Overlap with `process` — still Deno surface | | `Deno.hostname` / `Deno.osRelease` / `Deno.loadavg` / `Deno.systemMemoryInfo` / `Deno.uid` / `Deno.gid` | `shape-only` | Deno sys APIs | Linux only | | `Deno.exit` / `Deno.exitCode` | `shape-only` | Deno shape | — | | `Deno.env` (`get`/`set`/`toObject`/`has`/`delete`) | `shape-only` | Deno Env object | Not `process.env` | | `Deno.cwd` / `Deno.chdir` | `shape-only` | Deno shape | — | | `Deno.execPath` | `shape-only` | Deno shape | — | ## `Deno` namespace — files & FS | API | Kind | Notes | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------ | ------------------------ | | `Deno.readFile` / `readTextFile` / `readFileSync` / `readTextFileSync` | `shape-only` | Deno shapes over host fs | | `Deno.writeFile` / `writeTextFile` (+ sync) | `shape-only` | — | | `Deno.open` / `Deno.FsFile` | `shape-only` | File handle API | | `Deno.stat` / `lstat` / `fstat` (+ sync) | `shape-only` | — | | `Deno.mkdir` / `remove` / `rename` / `copyFile` / `link` / `symlink` / `readLink` / `realPath` / `truncate` / `chmod` / `chown` / `makeTemp*` / `create` / `readDir` | `shape-only` | Full Deno FS surface | | `Deno.watchFs` | `shape-only` | inotify on Linux | | `Deno.FileInfo` types | `shape-only` | — | ## Net & HTTP | API | Kind | Why exclusive-ish | Notes | | --------------------------------------------------------------------- | ------------ | ------------------- | ------------------------------------------------------------------------------------------------------- | | `Deno.listen` / `Deno.listenTls` / `Deno.connect` / `Deno.connectTls` | `shape-only` | Deno net API shapes | Bun/Node differ | | `Deno.serve` | `shape-only` | Deno HTTP server | Distinct from `Bun.serve` (I2) and Node `http` | | `Deno.resolveDns` | `shape-only` | Deno-shaped DNS API | Capability exists via `node:dns` (Node, and Bun's `node:dns`); only the `Deno.resolveDns` shape differs | | `Deno.upgradeWebSocket` | `exclusive` | Deno upgrade helper | — | ## Subprocess & workers | API | Kind | Notes | | ------------------------------------ | ------------ | ------------------------------------------------------- | | `Deno.Command` / `Deno.ChildProcess` | `shape-only` | Deno subprocess API (not `Bun.spawn` / `child_process`) | | `Deno.kill` | `shape-only` | — | ## Deno KV (exclusive built-in) | API | Kind | Why exclusive | Notes | | --------------------- | ----------- | ------------- | --------------------------------------- | | `Deno.openKv` | `exclusive` | Built-in KV | Not in Node/Bun as runtime builtin | | Atomic ops / `commit` | `exclusive` | — | Local backend first (SQLite/LMDB-style) | | KV queues / listeners | `exclusive` | — | Phase after core KV | | Remote KV URLs | `exclusive` | Optional | May refuse or limit to local for v0 | ## FFI & native | API | Kind | Why exclusive | Notes | | -------------------------------- | ----------- | ---------------- | ----------------------------- | | `Deno.dlopen` | `exclusive` | Deno FFI | Linux `.so`; permission-gated | | `Deno.UnsafePointer` / callbacks | `exclusive` | FFI detail types | — | ## Testing & tooling APIs | API | Kind | Why exclusive | Notes | | ------------ | ----------- | ------------------- | -------------------------------------- | | `Deno.test` | `exclusive` | Deno test API shape | Distinct from `bun:test` / `node:test` | | `Deno.bench` | `exclusive` | Deno bench API | — | ## Jupyter / notebook | API | Kind | Why exclusive | Notes | | -------------- | ----------- | ----------------------------- | --------------------------------------- | | `Deno.jupyter` | `exclusive` | Built-in Jupyter display APIs | Niche; phase late or refuse with reason | ## Other Deno-first surfaces | API | Kind | Notes | | ------------------------------------------------------------------------ | ----------- | ---------------------------------------------------------------------- | | `Deno.cron` | `exclusive` | Unstable in Deno (`--unstable-cron` / `deno.json` `unstable`) | | `Deno.telemetry` (`contextManager` / `meterProvider` / `tracerProvider`) | `exclusive` | OpenTelemetry; Deno enables via `OTEL_DENO=true`. May be host-provided | | `Deno.lint.Plugin` (lint plugin API) | `exclusive` | Unstable in Deno; refuse until the runtime surface stabilizes | ## Intentionally excluded | Surface | Reason | | ---------------------------------------- | --------------------------------------------------------------------- | | `node:` compat under Deno | Shared Node matrix | | `fetch` / Web streams / WebCrypto | Multi-runtime Web | | `npm:` specifier mechanics alone | Module host; shared packaging story | | `@std/testing/snapshot` snapshot helpers | Std-library API, not a `Deno.*` runtime surface | | Deno Deploy-only APIs | Cloud product | | Full `deno compile` binary product | Tooling CLI, not language runtime API (document separately if needed) | ## Maintenance 1. Diff Deno release notes against inventory each pin bump 2. Prefer local, permission-gated implementations 3. When an API becomes shared upstream, reclassify out of I3 ## Related topics - [Bun-exclusive inventory](/scripty/v0.0.1-dev/bun-exclusive/inventory.md) - [Deno-exclusive matrix](/scripty/v0.0.1-dev/deno-exclusive/matrix.md) - [Deno-exclusive roadmap](/scripty/v0.0.1-dev/deno-exclusive/roadmap.md) - [I3 — Deno-exclusive surface](/scripty/v0.0.1-dev/deno-exclusive/index.md) - [Roadmap](/scripty/v0.0.1-dev/roadmap.md)