research: SHARD-WP-0004 synthesis (the computational page model); workplan done

Consolidates the 8 computational/interactive-knowledge dives into one
source/derivation/projection model on two axes (replication<->derivation,
live<->snapshot); four computational page shapes; recommendation that
executable content is in scope as a page-model+projection concern, out of
scope as an execution platform (capability-gated, degrade to snapshot;
no INTENT amendment). Flips SHARD-WP-0004 status: done.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

research/260614-computational-page-model-synthesis/README.md

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+# 260614 — The computational page model (SHARD-WP-0004 synthesis)
+
+Date: 2026-06-15 · Source: **SHARD-WP-0004** post-batch synthesis (T1–T8)
+
+## What this is
+
+The acceptance-criteria synthesis for SHARD-WP-0004 — *"the computational page model"* —
+reading the eight computational/interactive-knowledge dives across each other and distilling
+them into **one model**: **source is canonical; everything rendered/computed is a
+projection**, placed on **two axes** (projection-kind: replication vs derivation; liveness:
+live↔snapshot), with a recommendation on an executable-content capability.
+
+## The answer to the carried question
+
+*Can a shard-wiki page be a live computational artifact?* **Yes — as a page-model +
+projection concern, not as an execution platform.** Every system externalizes to a canonical
+source and treats the live/computed form as derived; shard-wiki **recognizes** computational
+content, **attaches the source**, and **presents derivations as provenance- and
+liveness-marked projections**, with **execution as a gated capability (off by default,
+degrade to snapshot)**. No INTENT amendment required.
+
+## Key contributions
+
+- **One model:** `(source, derivation rule, projection with provenance + liveness)` covers
+  all four computational page shapes (one-source-many-projections UC-83; notebook UC-84;
+  program-as-page; live/temporal content).
+- **Two axes for T16:** replication vs **derivation-projection** (timing / multiplicity /
+  continuity facets) × the **live↔snapshot** axis (bounded at the irreducibly-live far end by
+  Strudel).
+- **One snapshot-provenance record** reused for notebook outputs, renders, recordings.
+- **Hard boundaries:** never host a kernel/runtime as store; **image-is-not-a-store**; never
+  present a derivation without output→source provenance.
+
+## Contents
+
+| Path | Role |
+|------|------|
+| `findings.md` | The source/derivation/projection model, the two axes, the four page shapes, provenance/reproducibility, the recommendation, the SHARD-WP-0002 fold-in, escalated open questions |