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 +1,115 @@
+<!--
+SPDX-License-Identifier: CC-BY-SA-4.0
+SPDX-FileCopyrightText: 2025-2026 Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>
+-->
+
+[![OpenSSF Best Practices](https://www.bestpractices.dev/projects/{{OPENSSF_PROJECT_ID}}/badge)](https://www.bestpractices.dev/projects/{{OPENSSF_PROJECT_ID}}) [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/{{OWNER}}/{{REPO}}/badge)](https://securityscorecards.dev/viewer/?uri=github.com/{{OWNER}}/{{REPO}})
+
+> [!NOTE]
+> This repository is a template. Placeholder tokens like `{{OWNER}}`,
+> `{{REPO}}`, and `{{PROJECT_NAME}}` are expected before running `just`
+> `init`.
+
+# Overview
+
+This template now uses a split maintenance model:
+
+- Authoritative session protocols live centrally in
+  `standards/session-management-standards`.
+
+- This repo keeps only thin local integration (Justfile aliases, local
+  hooks, coordination bindings, and repo-local checks).
+
+- Runtime session artifacts are generated per working repository in
+  `.session/`.
+
+# Session Management Integration
+
+Canonical command model:
+
+- `intake` `repo` `<path>`
+
+- `checkpoint` `change` `<path>`
+
+- `verify` `maintenance` `<path>`
+
+- `verify` `substantial` `<path>`
+
+- `verify` `release` `<path>`
+
+- `close` `planned` `<path>`
+
+- `close` `urgent` `<path>`
+
+- `recover` `repo` `<path>`
+
+- `handover` `full` `<path>`
+
+- `handover` `split` `<path>`
+
+- `handover` `model` `<path>`
+
+- `handover` `human` `<path>`
+
+Local binding files in this template:
+
+- `session/dispatch.sh`
+
+- `session/custom-checks.k9`
+
+- `session/local-hooks.sh`
+
+- `session/README.md`
+
+- `coordination.k9`
+
+Run `just` `session-help` for local aliases.
+
+# ABI/FFI Seam Layout
+
+The template keeps a verified interface seam split:
+
+- ABI (Idris2): `src/interface/Abi/*.idr`
+
+- FFI (Zig): `src/interface/ffi/src/*.zig`
+
+- Generated artifacts: `src/interface/generated/`
+
+# Repository Layout
+
+| Path | Purpose |
+|----|----|
+| `.machine_readable/` | Machine-readable policy and project metadata. |
+| `session/` | Thin local bindings to central session-management standards. |
+| `coordination.k9` | Local coordination wiring to canonical session commands. |
+| `docs/` | Human-facing technical and governance documentation. |
+| `src/interface/` | ABI/FFI/generated seam scaffolding. |
+| `verification/` | Proof and verification scaffolding. |
+
+# Quick Start
+
+```bash
+just init
+just verify
+just session-help
+```
+
+# Documentation
+
+- <a href="AUDIT.adoc" class="adoc">AUDIT</a> — local audit gate summary
+
+- <a href="EXPLAINME.adoc" class="adoc">EXPLAINME</a> — template
+  claim-to-implementation map
+
+- [session/README.md](session/README.md) — session binding usage
+
+- [docs/governance/README.adoc](docs/governance/README.adoc) — governance
+  docs index
+
+- <a href="CONTRIBUTING.md" class="md">CONTRIBUTING</a>
+
+- <a href="SECURITY.md" class="md">SECURITY</a>
+
+# License
+
+SPDX-License-Identifier: CC-BY-SA-4.0 See [LICENSE](LICENSE).