> ## 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. # Roadmap > Phased pre-v0.0.1 roadmap for ES engine completeness and Bun/Deno exclusive surfaces. # Roadmap High-level program timeline. Detailed phase tables live under each initiative. ## Program phases | Phase | Name | Focus | Exit | | ------ | ------------------ | -------------------------------------- | ------------------------------------------------ | | **P0** | Document | This tree, pins, empty honest matrices | Docs published; nav live | | **P1** | Oracle | Test262 harness + CI report on Linux | Pass rate published every CI run | | **P2** | Language kernel | ES-1 … ES-4 (parse, values, eval, GC) | Core semantics Test262 subsets green | | **P3** | Built-ins | ES-5 … ES-7 | Built-in matrix rows green for in-scope set | | **P4** | Modules + harden | ES-8 … ES-9 | **I1 exit bar** → language half of `0.0.1` | | **P5** | Exclusive surfaces | I2 + I3 implementation waves | Matrices climb; dogfood smokes for key rows | | **P6** | Tag | `0.0.1` | I1 hard gate + I2/I3 inventories + honest status | P5 may **overlap** the end of P3/P4 for inventory-driven stubs, but `supported` exclusive rows still require a working engine. ## I1 phase summary (ES Engine) | ID | Focus | Exit sketch | | ---- | ----------------------------------------------------------- | ------------------------------------------------------------------------- | | ES-0 | Spec pin + Test262 harness | CI runs suite, reports X/Y | | ES-1 | Full modern syntax (lexer/parser) | Syntax fixtures + parse subset | | ES-2 | Values, property attributes, exotic paths | Core value semantics | | ES-3 | Evaluation model (envs, this, completions) | Control-flow / scope tests | | ES-4 | GC roots for long suite runs | No UAF / false free under suite | | ES-5 | Built-ins wave 1 | Object, Function, Array, String, Number, Boolean, Math, Date, Error, JSON | | ES-6 | Built-ins wave 2 | Promise, Symbol, Map/Set/Weak\*, RegExp, TypedArray family | | ES-7 | Built-ins wave 3 + ES2025–2026 deltas | Proxy/Reflect, iterators, Iterator helpers, Set methods, … | | ES-8 | Module linking (cycles, TLA, import attributes as required) | Module Test262 green | | ES-9 | Hardening | **Zero open blockers** on in-scope Test262 | Full detail: [ES phases](/scripty/v0.0.1-dev/es/phases). ## I2 phase summary (Bun-exclusive) | ID | Focus | Exit sketch | | --- | --------------------------------------- | ------------------------------- | | B-0 | Inventory freeze + matrix | Every known Bun-only row listed | | B-1 | `Bun.file` / `Bun.write` / path helpers | File smokes | | B-2 | `Bun.serve` HTTP | Server smoke | | B-3 | `bun:sqlite` + SQL helpers | DB smoke | | B-4 | Hash / password / Glob / spawn cluster | Utility smokes | | B-5 | S3 + remaining long tail | Matrix depth | | B-6 | Dogfood scripts | Key rows `dogfooded` | Full detail: [Bun roadmap](/scripty/v0.0.1-dev/bun-exclusive/roadmap). ## I3 phase summary (Deno-exclusive) | ID | Focus | Exit sketch | | --- | ------------------------------- | -------------------------------- | | D-0 | Inventory freeze + matrix | Every known Deno-only row listed | | D-1 | Permissions model | Grant / deny / query | | D-2 | Core `Deno.*` I/O namespace | File/env/args smokes | | D-3 | Net / `Deno.serve` (Deno shape) | Server smoke | | D-4 | Deno KV | KV smoke | | D-5 | FFI / test / bench / long tail | Matrix depth | | D-6 | Dogfood scripts | Key rows `dogfooded` | Full detail: [Deno roadmap](/scripty/v0.0.1-dev/deno-exclusive/roadmap). ## Suggested calendar framing (not a promise) | Horizon | Intent | | ------- | ------------------------------------------------- | | Near | P0–P1: docs + Test262 harness; ES-1 parser growth | | Mid | P2–P3: language kernel + first built-in waves | | Far | P4: language gate; P5 exclusive surfaces; P6 tag | A greenfield Zig ES engine that passes modern Test262 is a **large** effort. Phases exist so progress is continuous and claimable without faking parity. ## Risks | Risk | Mitigation | | ------------------------------------------------ | ---------------------------------------------------------------- | | Underestimating ES surface area | Matrix rows + Test262 oracles; no silent “done” | | Confusing exclusive APIs with shared Node | Strict I2/I3 filters | | Host pressure (DX/yappy) derailing language work | Embed stubs OK; language gate stays primary for `0.0.1` | | Upstream Bun/Deno API churn | Version pins in [Sources](/scripty/v0.0.1-dev/reference/sources) | | Scope creep into browsers / multi-OS | Permanent product locks | ## After `0.0.1` Post-tag work (not this program’s exit bar): * Shared Node / Deno / Bun **overlap** surfaces * Framework dogfood (Next, Nuxt, Nest, Solid — equal priority) * Embed depth for DX and yappy * PM/CAS offline graphs * Broader npm without adapters See [Relationship to the v1 plan](/scripty/v0.0.1-dev/reference/relationship-to-v1). ## Related topics - [Bun-exclusive roadmap](/scripty/v0.0.1-dev/bun-exclusive/roadmap.md) - [Deno-exclusive roadmap](/scripty/v0.0.1-dev/deno-exclusive/roadmap.md) - [I2 — Bun-exclusive surface](/scripty/v0.0.1-dev/bun-exclusive/index.md) - [Pre-v0.0.1 program](/scripty/v0.0.1-dev/index.md) - [Principles](/scripty/v0.0.1-dev/principles.md)