docs(readme): convert README.adoc -> Markdown README.md

README must be real Markdown to render in GitHub community-health, the GitHub
profile, and external MCP directories (Glama) — AsciiDoc shows as raw markup
there. pandoc asciidoc->GFM, badges fixed to clickable, SPDX header kept as an
HTML comment, duplicate README.adoc removed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: hyperpolymath

README.adoc

@@ -0,0 +1,152 @@
+<!--
+SPDX-License-Identifier: CC-BY-SA-4.0
+SPDX-FileCopyrightText: 2025-2026 Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
+-->
+
+[![MPL-2](https://img.shields.io/badge/License-MPL_2.0-blue.svg)](https://opensource.org/licenses/MPL-2.0) = DocMatrix [![OpenSSF Best Practices](https://img.shields.io/badge/OpenSSF-Best_Practices-green?logo=openssourcesecurity)](https://www.bestpractices.dev/en/projects/new?repo_url=https://github.com/hyperpolymath/formatrix-docs)
+
+[![Palimpsest](https://img.shields.io/badge/Philosophy-Palimpsest-indigo.svg)](https://github.com/hyperpolymath/palimpsest-license)
+
+# License & Philosophy
+
+This project must declare **MPL-2.0-or-later** for platform/tooling
+compatibility.
+
+Philosophy: **Palimpsest**. The MPL-2.0 (PMPL) text is provided in
+`license/MPL-2.0.txt`, and the canonical source is the
+palimpsest-license repository.
+
+Cross-platform document editor with format tabs
+(TXT/MD/ADOC/DJOT/ORG/RST/TYP). Gossamer GUI + Ada TUI. Graph
+visualization, OCR, TTS/STT, Nickel pipelines.
+
+# Features
+
+- **Format Tabs** - View and edit the same document in multiple markup
+  formats
+
+- **Unified AST** - Lossless conversion between formats
+
+- **GUI** - Gossamer with ReScript frontend
+
+- **TUI** - Ada with AdaCurses for terminal usage
+
+- **Graph Visualization** - ArangoDB for document relationships
+
+- **Accessibility** - OCR, TTS, STT support
+
+- **Pipelines** - Nickel-based import/export transformations
+
+# Supported Formats
+
+| Format | Description           |
+|--------|-----------------------|
+| TXT    | Plain text            |
+| MD     | Markdown (CommonMark) |
+| ADOC   | AsciiDoc              |
+| DJOT   | Djot markup           |
+| ORG    | Org-mode              |
+| RST    | reStructuredText      |
+| TYP    | Typst                 |
+
+# Quick Start
+
+```bash
+# Check dependencies
+just deps
+
+# Build all components
+just build
+
+# Run GUI
+just run-gui
+
+# Run TUI
+just run-tui
+```
+
+# Architecture
+
+    crates/
+    ├── formatrix-core/     # AST, parsers, renderers
+    ├── formatrix-gui/      # Gossamer commands
+    ├── formatrix-db/       # ArangoDB client
+    └── formatrix-pipeline/ # Nickel executor
+
+    tui/src/                # Ada TUI source
+    ui/src/                 # ReScript components
+    pipelines/              # Nickel pipeline definitions
+    container/              # Wolfi container configs
+
+# Development
+
+## Prerequisites
+
+- Rust (stable)
+
+- Deno
+
+- GNAT + gprbuild (for TUI)
+
+- Gossamer + WebKit2GTK (for GUI)
+
+## Build Commands
+
+```bash
+just build           # Build all
+just build-core      # Build Rust core only
+just build-tui       # Build Ada TUI only
+just build-ui        # Build ReScript UI only
+just test            # Run all tests
+just fmt             # Format all code
+just lint            # Lint all code
+```
+
+## Containers
+
+```bash
+just container-build           # Build Wolfi image
+just compose-up                # Start with ArangoDB
+just container-run-tui         # Run TUI in container
+```
+
+# RSR Compliance
+
+This project follows the Rhodium Standard Repositories specification:
+
+- **Tier 2** - Full-featured multi-language project
+
+- See <a href="RSR_COMPLIANCE.adoc" class="adoc">RSR_COMPLIANCE</a> for
+  details
+
+# Related Scripts
+
+Automation scripts from
+[hyperpolymath/scripts](https://github.com/hyperpolymath/scripts):
+
+| Script | Purpose |
+|----|----|
+| `asdfman.sh` | Manage asdf plugins and versions |
+| `init_bashrc_three_ply.sh` | Modular bashrc setup (three-layer architecture) |
+| `k-check.sh` | Kinoite cluster validation |
+| `k-intune.sh` | Kinoite tuning scripts |
+| `langstrap.sh` | Mass language install utilities |
+| `sysenv.sh` | System environment setup |
+| `touchscreen_hunter_killer.sh` | Touchscreen calibration/management |
+
+These scripts follow the same language policy (Bash, Rust, ReScript,
+Deno, Gleam, Guile Scheme) and multi-forge mirroring strategy.
+
+# License
+
+MPL-2.0 with Palimpsest philosophy.
+
+# Links
+
+- [Project State](.machine_readable/6a2/STATE.a2ml)
+
+- [Ecosystem Position](.machine_readable/6a2/ECOSYSTEM.a2ml)
+
+- [Architecture Decisions](.machine_readable/6a2/META.a2ml)
+
+- [Palimpsest Philosophy](PALIMPSEST.adoc)