PRISM v2.1.1 released

[Ronkupper]

PRISM v2.1.1 is out — a release-hygiene PATCH over v2.1.0. Surfaces sourced from the post-v2.0 shakedown and a Cowork irregular-run diagnostic on 2026-05-01.

Highlights

New: SP-15 — Triangulation integrity. Codifies the falsifier-grade triangulation premise as a Standing Principle, with two corollaries the framework had been carrying implicitly: single-vendor multi-agent fan-out is parallel execution, not falsifier-grade triangulation (equivalence dispatch requires distinct vendors); and self-triangulation — when the orchestration vendor is also one of the triangulated execution vendors — carries no asymmetric weighting in convergence.

§1.1 framing-line tightening. (orchestration on Claude; execution on any vendor) → (orchestration on Claude; execution on selected vendor per Vendor Selection). Compressed-attention readers had been latching onto "any vendor" as a category statement and missing the §4.5 default-stance correction 900 lines downstream.

§3.2.3 / §3.2.1 Prompt-digest semantics rewrite. Field-semantics bullet now leads with purpose ("detects wrong-prompt / wrong-attachment delivery at dispatch boundaries") before mechanism, and adds the explicit anti-pattern callout: Generating the digest at return time provides zero integrity check — there is nothing to compare against. The Envelope-template token is inverted to [orchestration-generated at dispatch; copy verbatim; never recomputed] so the counter-signal sits inside the template itself.

Calibration items worth reporting back

If you run a multi-vendor PRISM audit where Claude orchestrates and also participates as one of the triangulated vendors, SP-15's self-triangulation corollary is the load-bearing claim. Convergence should feel mechanical; if it doesn't, that's worth a Discussions note.

The §1.1 framing change should be invisible to operators who already understand Vendor Selection. The new wording is the load-bearing surface for compressed-attention reads and for vendors who are loading the framework with limited context budget.

Files & provenance

• Release: https://github.com/Ronkupper/PRISM/releases/tag/v2.1.1
• Stable file: PRISM.md
• Pinned snapshot: PRISM_v2_1_1.md
• Previous: v2.1.0

Backlog and what's coming next: see PRISM_backlog.md on main.