General compiler (inauguration)

in is a hybrid compiler driver: many source fronts → shared Core IR → MIR → native_emit / JIT. Scope is compiler infrastructure, agent/graph reports, and owned backends—not UI (that stays in crepuscularity).

Status matrix: in languages / in languages --json. Roadmap: universal-compiler-roadmap.md.

Pipeline

  .in / .icore / Tree-sitter / rust_front / v_front
                    │
                    ▼
              UnifiedModule (Core IR)
                    │
                    ▼
         compiler::driver → textual SIL / MIR
                    │
                    ▼
           native_emit (AArch64, x86_64) + jit_runtime

Layer	Location	Notes
Resolution	`parser_registry`	CLI, `IN_PARSER`, shebang, extension → `ParserId`
Parse	`in_lang_parse`, `icore`, `tree_front`, …	→ `UnifiedModule`
Lower	`lower_core`, `mir_lower`	Bounded bodies → machine code
CLI	`in-cli`	`build`, `compile`, `execute`, `graph`, `test`
Docs hub	`docs-site/`	`crepus web build` / `web serve` (crepuscularity)

inlang + crepuscularity

inlang (.in): orchestration, capabilities, polyglot driver, JIT programs.
crepuscularity (.crepus): declarative UI, docs-site/ web target (crepus.toml), WASM shell.

icore (JSON Core IR)

v1: declarations only; empty function bodies.
v2: bounded statement/expression bodies for tools.
v3: boundary ABI (boundary_ir) for layout/symbol export.

Samples: apps/icore-sample/.

Orchestration surfaces (v0.4)

Surface	CLI
Canonicalize	`in canonicalize`
Graph	`in graph`
Package report	`in package`
Backend facts	`in backend`
Self-hosted tests	`in test`

GPU, remote workers, and non-owned runtimes stay status-only until in-tree runtime + tests exist. See orchestration-compiler.md, native-backend.md.

Per-language landing