10. Appendix

STATUS: outline only. To be filled in.

What this chapter covers

References, source index, and cross-links. No new material — just the machinery a reader uses to follow up on the rest of the guide.

Section outline

§10.1. Source index

• kernel/src/institution/ — Institution trait, InstitutionRuntime, InstitutionIndex, AutoOnLoad dispatch
• kernel/src/nbe/eval.rs — the Exp::InstitutionInvoke arm and the four-step pipeline
• kernel/src/program/trace.rs — Trace::Comorphism audit variant
• crates/runtime-substrate/ — substrate hosting for external-runtime institutions
• julia/comorphisms/ — the v1 comorphism declarations
• notebooks/examples/kinase-institutions.json — the canonical worked example

§10.2. Related design documents

• D14 — Institution Realisation — institution mechanism (supersedes D10); §4 the resource shapes, §6 the dispatch roles, §9.3 the chain-reinsertion contract
• D26 — Runtime substrate — substrate hosting layer
• D27 — Julia institutions — the v1 Julia institution suite
• D29 — Mirror generator — closure walker over chain shapes
• D31 — Institution lifecycle — install + audit lifecycle
• D32 — Chain-mirrored EigenTT inductives — formulas:FormulaTerm and the inductive-types-on-the-chain mechanism

§10.3. Companion notes

Neither of these was ever written. They are listed because the guide referred to them as though they existed, in five places and two respectively; the links were removed on 2026-08-31 and the descriptions kept, since they record what someone thought was worth writing.

• Note for a SHACL user — the conceptual pitch for someone coming from the W3C semantic-web stack. Frames why composition matters in narrative form.
• Enterprise supply-chain scenario — the same machinery applied to an enterprise setting; useful as a domain-transfer exercise.

§10.4. Cross-language guides

• ESL — surface syntax for ontologies and programs
• EigenQL — surface syntax for queries
• Formula language — chain-mirrored EigenTT fragment used as the v1 cross-institution payload

§10.5. Per-host implementer chapters

• Platform §10 — Building WASM institutions
• Platform §11 — Runtime substrate
• platform/julia-institutions/ — per-institution Julia tutorials

§10.6. Phase status

The composition surface is complete through Phase 19i (D14 §9.3 chain reinsertion through both ESL and EigenQL surfaces). Tracked next:

• Per-payload sharing beyond FormulaTerm (planning).
• Lean-4 as a verification institution (D28; not yet wired).
• The first non-Julia substrate runtime (Python tracked at issue #41).
• The first cross-host comorphism (a Julia substrate institution bridging to a WASM-hosted institution).
• A formal translation of institution theory (Goguen & Burstall, set + model-theoretic) into constructive type theory, replacing models with typed witnesses under Curry–Howard. Background context in §3.9. Open research direction; widely believed feasible — the kernel’s EigenTT already carries the load-bearing pieces (Pi/Sigma types, typed inductive verdicts), the gap is the meta-theoretic equivalence proof.

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