Add the SQA and QC framework and project instructions

Mount the framework as a submodule at framework/ (v0.4.0), add AGENTS.md and
the installed skill copies for Codex CLI (.agents/skills) and Claude Code
(.claude/skills).

.claude/skills/artifact/templates/RC.md

@@ -0,0 +1,51 @@
+# @TITLE@
+
+## Metadata
+| Key | Value |
+| --- | --- |
+| ID | @ID@ |
+| CrossReference | @CROSSREF@ |
+
+## Version History
+| Date | Status | Author | Reviewer | Change | Commit |
+| --- | --- | --- | --- | --- | --- |
+| @DATE@ | Proposed | @AUTHOR@ | <reviewer S-ID> | Initial version | pending |
+
+---
+
+## Artifact Under Review
+
+- Instance reviewed: [<INSTANCE-ID>]
+- Checklist used: [<QC-ID>] (`QC-<short-name>-<version>`, e.g. `QC-BC-001`)
+- Scope: <full review | delta re-review of criteria <numbers>, reason, earlier record [<RC-ID>]>
+- Language and domain: <Language> / <Domain> (the artifact's Metadata rows), or `n/a` for a technical type
+- Language reviewer: <stakeholder ID>, or `none` when the reviewer reads the language and knows the domain
+
+## Checklist Results
+
+| # | Criterion | Status | Evidence/Notes |
+| --- | --- | --- | --- |
+| 1 | <criterion copied from the QC checklist> | Pass/Fail/N-A | |
+
+## Language and Domain Results
+
+Only for an artifact of a type written in the PO language: the rows of
+`QC-LANG-001`, in order. Delete this section for a technical type.
+
+| # | Criterion | Status | Evidence/Notes |
+| --- | --- | --- | --- |
+| 1 | <criterion copied from QC-LANG-001> | Pass/Fail/N-A | |
+
+## Overall Verdict
+
+<Go / Go-with-conditions / No-Go> — <rationale>
+
+## Action Items
+
+| Action | Owner | Due |
+| --- | --- | --- |
+| <action> | <stakeholder ID, e.g. S07> | <date> |
+
+---
+
+@LINKS@