chore: migrate SCM checkpoint files to A2ML format

Convert .machine_readable/*.scm files to .machine_readable/6a2/*.a2ml
and update CLAUDE.md references. Removes legacy LLM_SUPERINTENDENT.scm,
ROADMAP.f0.scm, and SPEC.core.scm. Part of batch SCM-to-A2ML migration
(hyperpolymath/standards#20).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

.claude/CLAUDE.md

@@ -2,12 +2,12 @@
 
 The following files in `.machine_readable/` contain structured project metadata:
 
-- `STATE.scm` - Current project state and progress
-- `META.scm` - Architecture decisions and development practices
-- `ECOSYSTEM.scm` - Position in the ecosystem and related projects
-- `AGENTIC.scm` - AI agent interaction patterns
-- `NEUROSYM.scm` - Neurosymbolic integration config
-- `PLAYBOOK.scm` - Operational runbook
+- `.machine_readable/6a2/STATE.a2ml` - Current project state and progress
+- `.machine_readable/6a2/META.a2ml` - Architecture decisions and development practices
+- `.machine_readable/6a2/ECOSYSTEM.a2ml` - Position in the ecosystem and related projects
+- `.machine_readable/6a2/AGENTIC.a2ml` - AI agent interaction patterns
+- `.machine_readable/6a2/NEUROSYM.a2ml` - Neurosymbolic integration config
+- `.machine_readable/6a2/PLAYBOOK.a2ml` - Operational runbook
 
 ---
 
@@ -29,7 +29,7 @@ The following files in `.machine_readable/` contain structured project metadata:
 | **JavaScript** | Only where ReScript cannot | MCP protocol glue, Deno APIs |
 | **Python** | SaltStack only | No other Python permitted |
 | **Nickel** | Configuration language | For complex configs |
-| **Guile Scheme** | State/meta files | STATE.scm, META.scm, ECOSYSTEM.scm |
+| **A2ML** | State/meta files | .machine_readable/6a2/STATE.a2ml, .machine_readable/6a2/META.a2ml, .machine_readable/6a2/ECOSYSTEM.a2ml |
 | **Julia** | Batch scripts, data processing | Per RSR |
 | **OCaml** | AffineScript compiler | Language-specific |
 | **Ada** | Safety-critical systems | Where required |

.machine_readable/6a2/AGENTIC.a2ml

@@ -0,0 +1,2 @@
+;; SPDX-License-Identifier: PMPL-1.0-or-later
+;; Reserved for future use.

.machine_readable/6a2/ECOSYSTEM.a2ml

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: PMPL-1.0-or-later
+# ECOSYSTEM.a2ml — Ecosystem position
+# Converted from ECOSYSTEM.scm on 2026-03-21
+
+[metadata]
+project = "affinescript"
+ecosystem = "hyperpolymath"
+
+[position]
+type = "programming-language"
+purpose = "A systems programming language combining affine types, dependent types, row polymorphism, and extensible effects, compiling to WebAssembly"

.machine_readable/6a2/META.a2ml

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: PMPL-1.0-or-later
+# META.a2ml — Project meta-information
+# Converted from META.scm on 2026-03-21
+
+[metadata]
+project = "affinescript"
+author = "Jonathan D.A. Jewell <j.d.a.jewell@open.ac.uk>"
+license = "PMPL-1.0-or-later"
+standard = "RSR 2026"

.machine_readable/6a2/NEUROSYM.a2ml

@@ -0,0 +1,2 @@
+;; SPDX-License-Identifier: PMPL-1.0-or-later
+;; Reserved for future use.

.machine_readable/6a2/PLAYBOOK.a2ml

@@ -0,0 +1,2 @@
+;; SPDX-License-Identifier: PMPL-1.0-or-later
+;; Reserved for future use.

.machine_readable/6a2/STATE.a2ml

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: PMPL-1.0-or-later
+# STATE.a2ml — Project state checkpoint
+# Converted from STATE.scm on 2026-03-21
+
+[metadata]
+project = "affinescript"
+version = "0.1.0"
+last-updated = "2026-01-04"
+status = "active"
+
+[project-context]
+name = "affinescript"
+completion-percentage = 80
+phase = "interpreter-implementation"
+tagline = "Rust-inspired language with affine types, dependent types, row polymorphism, and extensible effects"