paper: add /paper skill + 1H HW-SW codesign report (GEMM, All-Reduce, fused GQA)

New `/paper` slash-command skill that synthesizes ADR/SPEC content and live
KernBench benchmark results into a sectioned LaTeX technical paper compiled
to PDF with Tectonic (auto-installed). The skill negotiates a TOC, grounds
every number in committed artifacts or fresh bench runs, and keeps
report-only benches isolated.

This commit also includes the first generated report:
- docs/report/1H-codesign-paper/ — main.tex + per-section .tex, figures,
  toc.md contract, and the built 8-page main.pdf. Covers the platform
  (source-level kernels, latency model + accuracy, HW config from
  topology.yaml), GEMM via composite command, All-Reduce via PE_IPCQ, and
  fused GQA combining both, plus discussion/conclusion/2H future work.
- scripts/paper/ — isolated report harnesses (not registered benches):
  paper_gqa_latency.py harvests per-panel GQA end-to-end latency + engine
  occupancy (the milestone only emitted op-counts); paper_plot_gqa.py
  renders the GQA figures.

GEMM/All-Reduce reuse committed milestone figures/CSVs; GQA results are
generated fresh. Honest flags retained: PE_CPU dispatch cost is 0 in this
config, and the proposed two-composite softmax_merge decode is marked
designed-not-measured.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/report/1H-codesign-paper/main.tex

@@ -0,0 +1,40 @@
+\documentclass[10pt,twocolumn]{article}
+
+\usepackage[margin=0.75in]{geometry}
+\usepackage{graphicx}
+\usepackage{booktabs}
+\usepackage{amsmath}
+\usepackage{amssymb}
+\usepackage{siunitx}
+\DeclareSIUnit\flop{FLOP}
+\DeclareSIUnit\cycle{cycle}
+\DeclareSIUnit\byte{B}
+\usepackage{xcolor}
+\usepackage{hyperref}
+\hypersetup{colorlinks=true,linkcolor=blue!50!black,citecolor=blue!50!black,urlcolor=blue!50!black}
+\usepackage{caption}
+\captionsetup{font=small,labelfont=bf}
+\usepackage{microtype}
+
+\graphicspath{{figures/}}
+
+\title{\textbf{Hardware--Software Codesign for Attention-Centric\\
+LLM Kernels: GEMM, Collective Communication, and\\
+Fused Grouped-Query Attention}}
+\author{KernBench Team}
+\date{2026 First Half (1H)}
+
+\begin{document}
+\maketitle
+
+\input{sections/00-exec-summary}
+\input{sections/01-introduction}
+\input{sections/02-platform}
+\input{sections/03-gemm}
+\input{sections/04-allreduce}
+\input{sections/05-gqa}
+\input{sections/06-discussion}
+\input{sections/07-conclusion}
+\input{sections/08-future-work}
+
+\end{document}