[beta.2.3] Audit repository file lifecycle and remove redundancy islands

[SisyphusZheng]

ADR-0152 / #1341 scheduling amendment: execute cleanup alongside every Beta.2.1/Beta.2.2 replacement; Beta.2.3 is the residual closure checkpoint, not the start of cleanup. Remove displaced owners and their callers/checkers/docs together with regression evidence.

[beta.2.3] Audit repository file lifecycle and remove redundancy islands

Part of #1322. Release: beta.2.3. Excludes examples/**.

Method

Classify suspicious files KEEP / MERGE / DELETE / HISTORICAL. For each: What does it own? Is it canonical? Who consumes it? Is the consumer independently legitimate? What is its lifecycle? Why can it not be merged? What retires it?

Audit surface: root; .agents; .github; packages; package fixtures; tools; docs; www; root evidence; benchmarks (where active governance inputs); release machinery; generated artifacts.

Known inputs from the 2026-09-05 redundancy audit

• www/e2e visual baselines: 272 PNG / ~30.5MB — evaluate lossy format or viewport-matrix convergence (adjudicate together with the carried visual-drift risk; do not silently normalize).
• v0.44 stage tooling (~3.4k LOC) — sunset per constitution rule 4.
• zod + valibot double dependency — nearly suspended; consolidate to one.
• docs/release historical evidence — safe to prune from HEAD only after verifying release:evidence:check reads tag trees and the CURRENT version chain stays intact.

The census lives in an issue comment / PR description / generated CI artifact. Do not commit a permanent file registry.

Release

beta.2.3.