pyvm: split op handlers into ops_core/ops_box/ops_ctrl; add ops_flow + intrinsic; delegate vm.py without behavior change

net-plugin: modularize constants (consts.rs) and sockets (sockets.rs); remove legacy commented socket code; fix unused imports
mir: move instruction unit tests to tests/mir_instruction_unit.rs (file lean-up); no semantic changes
runner/pyvm: ensure using pre-strip; misc docs updates

Build: cargo build ok; legacy cfg warnings remain as before

README.md

@@ -28,11 +28,25 @@ Quick pointers
 
 Developer quickstart: see `docs/DEV_QUICKSTART.md`. Changelog highlights: `CHANGELOG.md`.
 User Macros (Phase 2): `docs/guides/user-macros.md`
+Exceptions (postfix catch/cleanup): `docs/guides/exception-handling.md`
+ScopeBox & MIR hints: `docs/guides/scopebox.md`
 AST JSON v0 (macro/bridge): `docs/reference/ir/ast-json-v0.md`
 MIR mode note: default is MIR13 (PHI-off). See `docs/development/mir/MIR13_MODE.md`.
 Self‑hosting one‑pager: `docs/how-to/self-hosting.md`.
 ExternCall (env.*) and println normalization: `docs/reference/runtime/externcall.md`.
 
+Profiles (quick)
+- `--profile dev` → Macros ON (strict), PyVM dev向け設定を適用（必要に応じて環境で上書き可）
+- `--profile lite` → Macros OFF の軽量実行
+  - 例: `./target/release/nyash --profile dev --backend vm apps/tests/ternary_basic.nyash`
+
+Specs & Constraints
+- Invariants (must-hold): `docs/reference/invariants.md`
+- Constraints (known/temporary/resolved): `docs/reference/constraints.md`
+- PHI & SSA design: `docs/architecture/phi-and-ssa.md`
+- Testing matrix (spec → tests): `docs/guides/testing-matrix.md`
+- Comparison with other languages: `docs/comparison/nyash-vs-others.md`
+
 ## Table of Contents
 - [Self‑Hosting (Dev Focus)](#self-hosting)
 - [Try in Browser](#-try-nyash-in-your-browser-right-now)