init: ai-prompts repo with project briefings and onboarding prompts

general/git-conventions.md

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+# Git Commit Conventions
+
+Standard commit message format used across all repos on this Gitea instance.
+
+## Format
+
+```
+type: short description (max 72 chars)
+
+Optional longer body explaining WHY, not what.
+```
+
+## Types
+
+| Type | Use for |
+|------|---------|
+| `init` | First commit in a repo |
+| `feat` | New feature or capability |
+| `fix` | Bug fix |
+| `update` | Enhancement to existing feature |
+| `chore` | Maintenance — deps, config, ignores |
+| `docs` | Documentation only |
+| `refactor` | Code restructure, no behaviour change |
+| `remove` | Deleting files or features |
+| `deploy` | Deployment-related changes |
+
+## Examples
+
+```
+init: initial dotfiles
+feat: add automount for NAS share
+fix: correct SSH config hostname typo
+update: extend deploy script to restart php-fpm
+chore: add .gitignore for node_modules
+docs: add README for arduino sketches
+remove: drop legacy rsync deploy script
+```
+
+## Branch Naming
+
+```
+main / master   — stable, production-ready
+dev             — active development
+feature/NAME    — specific feature work
+fix/NAME        — specific bug fix
+```
+
+## Tags (for deployments)
+
+```
+v1.0.0    — major release
+v1.2.0    — minor feature addition  
+v1.2.1    — patch / hotfix
+deploy-YYYYMMDD  — deployment snapshot
+```