> ## 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. # Bun-exclusive inventory > Catalog of Bun APIs that Node and Deno do not ship as first-class runtime surfaces. # Bun-exclusive inventory This inventory lists **targets** for I2. Inclusion rule: > Native in Bun (global `Bun`, `bun:*`, or documented built-in) **and** not first-class in Node **and** not first-class in Deno. If Node or Deno gain a first-class equivalent later, **move** the row to a shared matrix and note the date. **Pin:** see [Sources](/scripty/v0.0.1-dev/reference/sources). Reconcile this list against Bun’s docs when the pin changes. ## Global `Bun` — I/O and process | API | Why exclusive | Notes for scripty | | ----------------------------------------------------- | -------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------- | | `Bun.file` | Bun Blob/file ergonomics; not Node/`Deno` shape | Map to Linux fd/path; zero-copy where possible | | `Bun.write` | First-class write helper on `Bun` | Paths + Response/Blob sources | | `Bun.stdin` / `Bun.stdout` / `Bun.stderr` as Bun File | Bun-specific File handles | — | | `Bun.serve` | Bun-shaped HTTP server API (fetch handler style); exclusive by namespace + shape | `Deno.serve` is a different shape (I3); Node needs `http`/`node:http` | | `Bun.connect` / TCP helpers on `Bun` | Bun-shaped networking helpers | Confirm pin; implement Linux sockets | | `Bun.listen` | Bun listener API if still first-class | Same | | `Bun.spawn` / `Bun.spawnSync` | Bun subprocess API (not `child_process` / `Deno.Command`) | Capability-scoped | | `Bun.openInEditor` (editor helper) / related DX | Bun-only DX | Optional low priority | | `Bun.which` | Path lookup helper | — | | `Bun.sleep` / `Bun.sleepSync` | Bun helpers | Thin; still inventory | | `Bun.env` | Bun env object surface | Overlaps conceptually; shape differs — keep if Bun-global only | | `Bun.main` / `Bun.argv` | Entry metadata | — | | `Bun.version` / `Bun.revision` | Runtime identity | scripty should expose scripty identity separately; optional Bun-compat shims later | ## Global `Bun` — data, crypto, strings | API | Why exclusive | Notes | | ----------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------- | ---------------------------------------------------- | | `Bun.password` (hash/verify) | Built-in password hashing API | Use audited crypto (libsodium/openssl) | | `Bun.hash` / `Bun.CryptoHasher` | Bun hashing surface | — | | `Bun.CryptoHasher` algorithms (`sha1`, `sha256`, `sha512`, `sha3-256`, `blake2b256`, `md5`, `ripemd160`, …) | Concrete algorithm strings passed to `Bun.CryptoHasher` (no `Bun.SHA*` global exists) | Enumerate supported algorithms as the hash API lands | | `Bun.escapeHTML` | Built-in | — | | `Bun.stringWidth` | Terminal width | — | | `Bun.inspect` | Bun inspect formatting | — | | `Bun.deepEquals` | Utility | — | | `Bun.nanoseconds` | Timing | — | | `Bun.readableStreamTo*` helpers | Bun stream utilities | — | | `Bun.Glob` | Built-in glob | — | | `Bun.semver` | Built-in semver | — | | `Bun.TOML` / YAML parse helpers | Built-in config parsers | Confirm pin | | `Bun.JSONC` / related | Built-in | Confirm pin | | `Bun.peek` | Promise peek utility | — | | `Bun.gc` / memory helpers | Runtime GC controls | Map to scripty GC | | `Bun.generateHeapSnapshot` | Diagnostics | Post-core | | `Bun.mmap` | Memory-map files | Linux `mmap` | ## Global `Bun` — cloud / SQL | API | Why exclusive | Notes | | --------------------------------------------- | ----------------------------------- | ----------------------------------- | | `Bun.s3` / `S3Client` | Native S3 client | AWS/R2/MinIO; no AWS SDK required | | `Bun.sql` / `SQL` template | Built-in SQL client (Postgres path) | Distinct from `bun:sqlite` | | Redis client on `Bun` (if first-class in pin) | Built-in | Confirm against pin; add/remove row | ## `bun:*` modules | Module | Why exclusive | Notes | | ----------------------------- | -------------------- | -------------------------------------------------------------------------------------- | | `bun:sqlite` | Native SQLite module | High value; use system/sqlite amalgamation | | `bun:ffi` | Bun FFI | Zig-friendly; Linux `.so` | | `bun:test` | Bun test runner API | Distinct from `node:test` / `Deno.test` | | `bun:jsc` | Engine introspection | **Do not embed JSC** — provide scripty-native equivalents or refuse with matrix reason | | `bun:wrap` / internal modules | Rarely public | Only if documented stable | ## Transpiler / bundler runtime APIs | API | Why exclusive | Notes | | -------------------------- | ---------------------- | ---------------------------------- | | `Bun.Transpiler` | Built-in transpile API | Align with scripty transform layer | | `Bun.build` (programmatic) | Built-in bundler API | Large; phase late | | `Bun.plugin` hooks | Bun-only | Document stability | ## Intentionally excluded (not I2) | Surface | Reason | | ---------------------------------------------- | ------------------------------------------------------ | | `node:*` compatibility | Shared / Node matrix | | `fetch` / `Request` / `Response` / `WebSocket` | Web standard; multi-runtime | | `fs` / `path` / `buffer` | Node-shaped | | npm install performance | PM, not exclusive runtime API | | `tsx`/`ts-node` replacement | Transform policy, not Bun-only once others strip types | ## Maintenance 1. Diff Bun release notes against this inventory each pin bump 2. Mark deprecated Bun APIs `unsupported` with “upstream deprecated” 3. Prefer **behavior tests** over cloning Bun bugs unless needed for ecosystem ## Related topics - [Bun-exclusive roadmap](/scripty/v0.0.1-dev/bun-exclusive/roadmap.md) - [Bun-exclusive matrix](/scripty/v0.0.1-dev/bun-exclusive/matrix.md) - [Deno-exclusive inventory](/scripty/v0.0.1-dev/deno-exclusive/inventory.md) - [I2 — Bun-exclusive surface](/scripty/v0.0.1-dev/bun-exclusive/index.md) - [Roadmap](/scripty/v0.0.1-dev/roadmap.md)