PRISM v2.15.0 — Foundations

MINOR, additive (no construct renumbering). First of a dependency-ordered
sequence consolidating engagement learnings into the framework.

Surface

• SP-21 Trust structure, self-report advisory — load-bearing mechanisms rest
  on structure, the operator-set filename, and the copy-through digest; a
  producer's self-report is advisory. Rewrites §4.7 reconciliation: filename
  authoritative, self-ID an advisory cross-check, a mismatch a logged drift
  signal — never a halt.
• SP-22 Surface translation — nothing crosses a vendor/operator/card
  boundary un-rendered for that reader (parent of §4.12 self-containment, SP-17,
  the dispatch-card rule).
• retrieved | inferred finding-basis axis (§4.11) — decides recall-merge
  vs triangulate; SP-12 extended to inferences.
• SP-16 → visual-polarity/render-integrity channel; SP-10 → operator-environment
  state + external-send events; SP-13 substrate self-ID corroboration-only note.
• Defect fixes D1/D2/D3/D5; M10-rerun vs Follow-up (R1); M2 clobbered-pointer
  tie-break.
• Setup stakeholder-positioning (every stakeholder and the operator, stated
  positively); Setup-artifact re-audit; accumulate-never-overwrite.

Calibration / report back

• Does filename-authoritative reconciliation (SP-21) absorb real vendor self-ID
  drift without false halts?
• Does the retrieved|inferred axis route convergence correctly on mixed recon
  returns?
• Does stakeholder-positioning catch mis-scoped framing at P0 rather than late?

Provenance. Lens Library unchanged (v0.15). Snapshot PRISM_v2_15_0.md
(byte-identical at the v2.15.0 tag). Surface-drift map: Appendix D.

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Part of the PRISM v2.15.0 → v2.19.0 promotion arc. See RELEASING.md.