Add agent support templates and profiles

new-repository.md

@@ -30,6 +30,8 @@ Identify:
 - expected artifact type,
 - whether the repo is app, service, library, script, documentation, or infrastructure.
 
+If a matching stack profile exists in `profiles/`, read it before choosing commands.
+
 ### 2. Copy Baseline Files
 
 Create directories as needed and copy:
@@ -39,8 +41,12 @@ files/AGENTS.md              -> AGENTS.md
 files/project.md             -> .codex/project.md
 files/SECURITY.md            -> SECURITY.md
 files/CHANGELOG.md           -> CHANGELOG.md
+files/CONTRIBUTING.md        -> CONTRIBUTING.md
+files/gitignore.template     -> .gitignore
 files/release-checklist.md   -> docs/release-checklist.md
 files/security-review.md     -> docs/security-review.md
+files/agent-handoff.md       -> docs/agent-handoff.md
+files/release-notes.md       -> docs/release-notes.md
 files/blueprint.md           -> blueprint.md
 files/blueprint.json         -> blueprint.json
 files/build-gitea.yml        -> .gitea/workflows/build.yml