chore(machine-readable): migrate .scm files to A2ML format

Convert all .machine_readable/*.scm files to A2ML (.a2ml) format
to align with standards repo conventions.

Files converted:
- AGENTIC.scm -> AGENTIC.a2ml
- ECOSYSTEM.scm -> ECOSYSTEM.a2ml
- META.scm -> META.a2ml
- NEUROSYM.scm -> NEUROSYM.a2ml
- PLAYBOOK.scm -> PLAYBOOK.a2ml
- STATE.scm -> STATE.a2ml

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

Author: mistral-vibe

.machine_readable/AGENTIC.a2ml

@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: MPL-2.0
+# AGENTIC.a2ml — AI agent interaction patterns for claude-gecko-browser-extension
+
+[metadata]
+version = "1.0.0"
+
+[claude-code]
+model = "claude-opus-4-5-20251101"
+tools = ["read", "edit", "bash", "grep", "glob"]
+permissions = "read-all"
+
+[patterns]
+code-review = "thorough"
+refactoring = "conservative"
+testing = "comprehensive"
+
+[constraints]
+languages = []
+banned = ["typescript", "go", "python", "makefile"]

.machine_readable/AGENTIC.scm

@@ -0,0 +1,22 @@
+# SPDX-License-Identifier: MPL-2.0
+# ECOSYSTEM.a2ml — Ecosystem position for claude-gecko-browser-extension
+
+[metadata]
+version = "1.0"
+
+[project]
+name = "claude-gecko-browser-extension"
+type = ""
+purpose = ""
+
+[position-in-ecosystem]
+category = ""
+subcategory = ""
+unique-value = []
+
+[related-projects]
+projects = []
+
+[description]
+what-this-is = []
+what-this-is-not = []

.machine_readable/ECOSYSTEM.a2ml

@@ -0,0 +1,28 @@
+# SPDX-License-Identifier: MPL-2.0
+# META.a2ml — Meta-level information for claude-gecko-browser-extension
+
+[metadata]
+version = "1.0"
+
+[architecture-decisions]
+decisions = []
+
+[development-practices]
+code-style = []
+
+[development-practices.security]
+principle = "Defense in depth"
+
+[development-practices.testing]
+
+[development-practices.versioning]
+scheme = "SemVer"
+
+[development-practices.documentation]
+format = "AsciiDoc"
+
+[development-practices.branching]
+strategy = "main for stable"
+
+[design-rationale]
+rationale = []

.machine_readable/ECOSYSTEM.scm

@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: MPL-2.0
+# NEUROSYM.a2ml — Neurosymbolic integration config for claude-gecko-browser-extension
+
+[metadata]
+version = "1.0.0"
+
+[symbolic-layer]
+type = "scheme"
+reasoning = "deductive"
+verification = "formal"
+
+[neural-layer]
+embeddings = false
+fine-tuning = false
+
+[integration]

.machine_readable/META.a2ml

@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: MPL-2.0
+# PLAYBOOK.a2ml — Operational runbook for claude-gecko-browser-extension
+
+[metadata]
+version = "1.0.0"
+
+[deployment]
+procedures = []
+
+[deployment.procedures.deploy]
+build = "just build"
+test = "just test"
+release = "just release"
+
+[deployment.procedures.rollback]
+
+[deployment.procedures.debug]
+
+[alerts]
+
+[contacts]