sica-fondt/docs/plans/D2-medium.md
Claude 20e99f434c
docs/plans: remaining component specs — Identity, Cognition, Border, Storage, Periphery, Cross-cutting
Wave 1 remainder + Wave 2 design-first specs, completing one build plan per sub-organ:
- B1 tarot emulator, B2 SOUL/Big-3, B3 Celtic Cross
- C2 4+4 metacog, C3 inference cycle, C4 Brain
- D1 Ada border, D2 the medium, D3 mini-rag
- E1 3 GnuCOBOL invariant stores, E2 VARIANT stores, E3 RAG family
- F1 MoRAG, F2 SAE monitor, F3 subagents
- G1 stress-loop contract, G2 governance, G3 defense model

Each: contract + stubs for independent build; unfitted constants marked C1.

https://claude.ai/code/session_015hmgREHNsxYCuim33yUF2c
2026-06-13 20:08:19 +00:00

2.1 KiB

D2 — The medium / "the blood" (DESIGN-FIRST)

1. Component

The perfusion bus the organs share — what circulates between Brain and periphery. The architecture is explicit that organs communicate by perfusion, not direct wiring; this is that medium. Currently unnamed and unimplemented.

2. Status / certainty

DESIGN-FIRST · C1 (named structurally only; no backing, no name).

3. Language & location

TBD. Likely a message/IPC substrate (the R↔Octave↔Ada↔Guile organs must interoperate across languages), so a language-neutral transport (e.g. line-delimited JSON, or a small broker) is the leading shape.

4. Does / does-not

  • Does: carry organ secretions/injections between organs, always through Ada (D1) before reaching the Brain.
  • Does-not: police (D1), enrich (organs), or hold state (storage E*). It is transport, not gate.

5. Interface contract (proposed)

  • A typed envelope { from_organ, to, payload, provenance } every organ emits/consumes.
  • All cross-language organs (R Drive-Box, Octave ETR, Ada border, Guile mini-rag) speak this one shape → this is what makes the polyglot body interoperate without bespoke per-pair wiring.

6. Dependencies & stubs

Everything rides it; nothing it depends on. Stub today: in-process function calls + canned envelopes (which is exactly how the per-organ specs stub their I/O now — the medium formalizes those stubs).

7. Invariants / laws

  • L1 (C5): perfusion, not direct wiring — no organ holds a hard reference to another's internals.
  • L2 (C5): everything reaching the Brain crosses Ada (D1) first.
  • L3 (C1): envelope carries provenance (so D1 can enforce its provenance laws).

8. Build steps

  1. Name it + choose transport. 2. Define the envelope. 3. Replace the per-organ in-process stubs with real medium calls, one edge of the DAG at a time (start R↔Octave for the Drive-Box, A8/A1).

9. Tests

Round-trip an envelope between two stub organs; assert it passes through a D1 admit check; provenance preserved.

10. Open items

  • The name. The transport choice. Whether RDE drives idle-perfusion. (All C1.)