MEP-45 implementation tracking
Per-phase tracking for MEP-45 Mochi-to-C transpiler. Each phase has its own page; this index gives the at-a-glance view. Status values: NOT STARTED, IN PROGRESS, BLOCKED, LANDED, DEFERRED. Commit is the merge commit short SHA on main.
A phase is LANDED only when its gate is green on every target listed for it in MEP-45 §Phases. Missing targets become N.1, N.2, ... sub-phases per the umbrella-phase coverage rule.
Phase status
| Phase | Title | Targets | Status | Commit | Tracking page |
|---|---|---|---|---|---|
| 0 | Spec freeze and skeleton trees | n/a | LANDED 2026-05-22 19:01 (GMT+7) | — | phase-00 |
| 1 | Hello world | host | LANDED 2026-05-22 19:50 (GMT+7) | — | phase-01 |
| 2 | Primitives and control flow | host | LANDED | — | phase-02 |
| 3 | Records, lists, maps, sets | host | LANDED | — | phase-03 |
| 4 | Sum types and Maranget pattern matching | host | COMPLETE 2026-05-26 09:06 (GMT+7) | — | phase-04 |
| 5 | Closures and higher-order functions | host | COMPLETE 2026-05-26 09:06 (GMT+7) | — | phase-05 |
| 6 | Strings and I/O | host | COMPLETE 2026-05-26 09:06 (GMT+7) | — | phase-06 |
| 7 | Error model | host | COMPLETE 2026-05-26 09:06 (GMT+7) | — | phase-07 |
| 8 | Query DSL | host | COMPLETE 2026-05-26 09:06 (GMT+7) | — | phase-08 |
| 9 | Streams, agents, M:N scheduler | host | COMPLETE 2026-05-26 09:06 (GMT+7) | — | phase-09 |
| 10 | FFI shells | host | COMPLETE 2026-05-26 08:58 (GMT+7) | — | phase-10 |
| 11 | Cross-compile tier-1 matrix | tier-1 ×8 | LANDED 2026-05-26 00:01 (GMT+7) | — | phase-11 |
| 12 | WASM / WASI | wasm32-wasi | COMPLETE 2026-05-26 09:06 (GMT+7) | — | phase-12 |
| 13 | APE / Cosmopolitan | linux+mac+win+BSD | COMPLETE | — | phase-13 |
| 14 | LLM bindings | host | COMPLETE 2026-05-26 07:41 (GMT+7) | — | phase-14 |
| 15 | Datalog / logic | host | COMPLETE 2026-05-26 07:57 (GMT+7) | — | phase-15 |
| 16 | Sanitiser matrix | linux+mac | COMPLETE 2026-05-26 09:06 (GMT+7) | — | phase-16 |
| 17 | Reproducibility gate | tier-1 | COMPLETE 2026-05-26 09:06 (GMT+7) | — | phase-17 |
| 18 | Performance gate | linux+mac | COMPLETE 2026-05-26 09:06 (GMT+7) | — | phase-18 |
| 19 | v1.0 release | tier-1 | COMPLETE 2026-05-26 09:06 (GMT+7) | — | phase-19 |
Rules
- Goal-alignment audit. Before a phase starts, its tracking page gets a one-paragraph audit confirming the gate moves the user-facing goal ("ship a Mochi program as a single native binary on this target") not spec-internal scaffolding.
- Spec-in-sync. The PR that lands a phase's code also updates MEP-45 (close out the phase block, update Status / Commit) and this tracking page.
- Umbrella phase coverage. A phase is LANDED only when every target in its row is green. Missing rows become N.1, N.2, ... sub-phases listed on the phase tracking page.
- Auto-ship. Each phase or sub-phase ships as a single PR with auto-merge enabled (
--merge, not squash, per repo convention). - Reference oracle. Goldens are recorded by running the same source through vm3; the AOT binary's stdout is diffed against the golden. vm3 is the oracle only, never a code dependency.
See also
- MEP-45 §Phases: canonical phase definitions.
- Research notes (substrate): twelve notes covering language surface, design philosophy, prior art, runtime, codegen, type lowering, portability, dataset pipeline, streams, build system, testing, risks.