refactor: migrate Markdown to AsciiDoc

.claude/PROJECT.adoc

@@ -0,0 +1,34 @@
+== Thunderbird Template Reloaded - Claude Code Instructions
+
+This repository contains the Thunderbird email template system (reloaded
+version).
+
+=== Project Structure
+
+....
+thunderbird-template-reloaded/
+├── .claude/         # AI assistant instructions
+├── .git/           # Version control
+├── .gitignore      # Git ignore rules
+├── .editorconfig   # Editor configuration
+└── ...             # Template files
+....
+
+=== Build Commands
+
+Refer to project-specific documentation.
+
+=== Coding Conventions
+
+* Follow hyperpolymath standards
+* All code must have SPDX license headers
+* Use approved languages only (see CLAUDE.md)
+* Document all non-obvious decisions
+
+=== Security
+
+* No hardcoded secrets
+* All secrets through environment variables or secret management
+* SHA-pinned dependencies where applicable
+* HTTPS only, no HTTP URLs
+* No MD5/SHA1 for security purposes

.meta/REQUIRED-FILES.adoc

@@ -0,0 +1,58 @@
+== Required Repository Files
+
+The following files *MUST* be present and kept up-to-date in every
+repository:
+
+=== Mandatory Dotfiles
+
+[cols=",",options="header",]
+|===
+|File |Purpose
+|`+.gitignore+` |Exclude build artifacts, secrets, and temp files
+|`+.gitattributes+` |Enforce LF line endings and diff settings
+|`+.editorconfig+` |Consistent editor settings across IDEs
+|`+.tool-versions+` |asdf version pinning for reproducible builds
+|===
+
+=== Mandatory SCM Files
+
+[cols=",",options="header",]
+|===
+|File |Purpose
+|`+META.scm+` |Architecture decisions, development practices
+|`+STATE.scm+` |Project state, phase, milestones
+|`+ECOSYSTEM.scm+` |Ecosystem positioning, related projects
+|`+PLAYBOOK.scm+` |Executable plans, procedures
+|`+AGENTIC.scm+` |AI agent operational gating
+|`+NEUROSYM.scm+` |Symbolic semantics, proof obligations
+|===
+
+=== Build System
+
+[cols=",",options="header",]
+|===
+|File |Purpose
+|`+justfile+` |Task runner (replaces Makefile)
+|`+Mustfile+` |Deployment state contract
+|===
+
+*IMPORTANT*: Makefiles are FORBIDDEN. Use `+just+` for all tasks.
+
+=== Validation
+
+These files are checked by: - CI workflow validation - Pre-commit hooks
+(when configured) - Repository standardization scripts
+
+=== Updates
+
+When updating these files: 1. Use templates from `+rsr-template-repo+`
+as reference 2. Ensure SPDX license header is present 3. Test changes
+locally before pushing 4. Keep language-specific sections relevant to
+the repo
+
+=== See Also
+
+* https://github.com/hyperpolymath/rhodium-standard-repositories[RSR
+(Rhodium Standard Repositories)]
+* https://github.com/hyperpolymath/mustfile[Mustfile Specification]
+* https://github.com/hyperpolymath/meta-scm[SCM Format Family]