docs: add OVERVIEW.md (what/use/tools/locations/handover) mirroring Obsidian Kontra Day page
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# Kontra — Project Overview
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> **Kontra** is a self-hosted news-opinion site engine. Content is plain Markdown in a git repo;
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> a single static Go binary renders it into a fast, SEO-friendly editorial site; a Decap CMS admin
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> (authenticated with Gitea OAuth) lets editors work in the browser; and a git-driven pull loop
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> publishes changes live within ~30 seconds of a save.
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**Live:** https://kontra.lab.audasmedia.com.au · **Admin:** https://admin.kontra.lab.audasmedia.com.au/web/admin/
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**Repo (public):** https://gitea.lab.audasmedia.com.au/sam/kontra
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> 🗺 **Interactive architecture map:** https://maps.lab.audasmedia.com.au/kontra_day/docs/kontra-architecture-map.html
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> (pan/zoom, search, route tracing, dark/light themes)
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---
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## What it is
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A complete, self-hosted news/opinion publishing platform designed to run on the home lab:
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- **Markdown-first content** — articles are `.md` files with YAML front-matter. No database to manage.
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- **One static binary** — Go (golang) + templ + htmx + design-token CSS. No runtime, no Node, no PHP.
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- **Three edit paths** — Obsidian vault, Neovim/CLI, or the Decap CMS browser editor. All converge on one git repo.
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- **Git is the API** — full history, rollback, branch review, backups included.
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- **Autopublish** — `git push` → container pulls every 30s → live. Proven for add + delete.
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- **Self-hosted everything** — Gitea (origin), Garage S3 (media), Caddy (TLS), Decap (admin), Docker (runtime).
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## Architecture (Mermaid)
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```mermaid
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flowchart LR
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subgraph editors["Content Editors"]
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O[Obsidian vault<br/>/obsidian/kontra_content] -->|git push| G
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N[Neovim / CLI] -->|git push| G
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D[Decap CMS<br/>admin.kontra.lab] -->|OAuth + git commit| G
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end
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subgraph gitea["Gitea (192.168.20.35 :3001 Docker)"]
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G[(sam/kontra-content<br/>markdown origin of truth)]
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end
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subgraph prod["Kontra container (192.168.20.13 :8600 Docker)"]
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P[git pull loop<br/>every 30s] -->|restart on change| B
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B[Go binary<br/>templ + htmx + Goldmark]
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B --> MD[(Markdown render<br/>front-matter + shortcodes)]
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end
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subgraph media["Media (Garage S3 on .13)"]
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S3[(Garage S3<br/>kontra-day bucket)]
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end
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G -->|"SSH git"| P
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B -->|"shortcode: media"| S3
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B -->|"emits HTML"| CB[Caddy master<br/>.35 :80/:443]
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CB -->|"reverse_proxy :8600"| B
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subgraph net["Network"]
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CB -->|https| WWW[kontra.lab.audasmedia.com.au]
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CB -->|https| ADM[admin.kontra.lab.audasmedia.com.au]
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end
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WWW -->|browser| B
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ADM -->|browser| D
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```
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**Interactive version:** [maps.lab](https://maps.lab.audasmedia.com.au/kontra_day/docs/kontra-architecture-map.html) ·
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Rendered PNG: `docs/diagrams/kontra-architecture.png` · Mermaid source: `docs/kontra-architecture.mmd`
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## How to use it
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### As an editor
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1. Open **https://admin.kontra.lab.audasmedia.com.au/web/admin/** → **Login with Gitea** (needs push access to `sam/kontra-content`).
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2. **Articles** collection: create/edit, set subject/kicker/excerpt/featured, write Markdown body, Save. Wait ~30 s — the site updates.
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Or edit files directly: Obsidian vault (`/home/sam/obsidian/kontra_content`) or clone
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`ssh://git@gitea.lab.audasmedia.com.au:2222/sam/kontra-content.git`, edit, push.
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### Content model
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```
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content/
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├── config/site.yaml # site name, tagline, nav order
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├── subjects/<slug>/
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│ ├── _subject.yaml # name, template, accent color
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│ └── <slug>.md # article
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└── pages/<slug>.md
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```
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Template resolution: page front-matter → subject `_subject.yaml` → site config → fallback.
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Media: `{{media:file.jpg}}` (Garage S3), `{{embed:vimeo:ID}}`.
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### As an operator
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- Restart/redeploy: `ssh sam@192.168.20.13` → `cd /home/sam/Docker/Containers/kontra && docker compose up -d --build`
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- Pull loop: `entrypoint.sh` in the container (git pull every 30s, restart on change).
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- Logs: `docker logs -f kontra`
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- Content: `/var/www/kontra_day/content` on .13 (rw mount into container).
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## Tools used
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| Tool | Role | Where |
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|---|---|---|
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| Go (golang) 1.26 | App language — one static binary | `app/` |
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| templ v0.3 | HTML templates compile-to-Go | `app/src/*.templ` |
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| htmx | Server-rendered interactivity | templates |
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| goldmark | CommonMark renderer | `app/src/content.go` |
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| goccy/go-yaml | Front-matter/config parsing | `app/src/content.go` |
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| Decap CMS | Browser admin | `app/src/web/admin/` |
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| Gitea | Git origin (both repos) | .35 Docker :3001 |
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| Garage S3 | Media (`kontra-day` bucket) | .13 Docker :3900 |
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| Caddy | TLS + routing | .35 :80/:443 |
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| Docker / compose | Runtime container | .13 |
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| Design tokens (CSS vars) | Theming from `DESIGN.md` | `app/src/web/assets/kontra.css` |
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| Mermaid + Archify | Docs + interactive map | `docs/` |
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| Obsidian Git | Vault auto-push | .27 |
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## Where things are
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| Thing | Location |
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|---|---|
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| App source + deploy + docs | `/home/sam/home_network/web_sites/kontra_day/` (.27) |
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| Public repo | `https://gitea.lab.audasmedia.com.au/sam/kontra` |
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| Content repo (origin) | `https://gitea.lab.audasmedia.com.au/sam/kontra-content` |
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| Production content clone | `.13:/var/www/kontra_day/content` |
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| Docker project | `.13:/home/sam/Docker/Containers/kontra/` |
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| Obsidian vault | `/home/sam/obsidian/kontra_content` |
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| Interactive map | `https://maps.lab.audasmedia.com.au/kontra_day/docs/` |
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| Plan/decisions | `PLAN.md` |
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| Design system | `DESIGN.md` |
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## Configs for the future (handover notes)
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### Networking
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- Master Caddy (.35, `/Docker/Containers/caddy/Caddyfile`) → both `kontra.lab…` and `admin.kontra…` → `reverse_proxy 192.168.20.13:8600`.
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- .13 Caddy config is back to pre-Kontra. **Kontra runs in Docker — do not re-add to configuration.nix** (NixOS system units are Nix-store-managed).
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### Gitea / OAuth
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- OAuth app `decap-kontra` (non-confidential / PKCE) in Gitea → Settings → Applications.
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- Gitea CORS enabled for the admin origin (`GITEA__cors__*` in `/Docker/Containers/gitea/docker-compose.yml`).
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- Decap `config.yml`: `backend: name: gitea`, simple workflow (no editorial workflow PRs — Gitea backend limitation).
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### Secrets
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- Gitea deploy token + API base: `.env` at repo root (.27), **gitignored, never commit**. chmod 600.
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### Deploy specifics
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- Docker image builds Go+templ in-image; runner is slim. Port 8600.
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- Container mounts content (rw) + `/home/sam/.ssh/id_ed25519` (ro) for the pull.
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- Pull loop uses `exec` so the server PID is always direct (prior nested-subshell bug caused "address already in use" on restart — fixed).
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### Known-good state (verified 2026-09-09)
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- Add/delete content → live in ~30 s. Clean restarts.
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- Front page, `/articles/<slug>`, `/subjects/<slug>` all 200.
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- Admin renders Decap login; "Login with Gitea" OAuth flow works.
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---
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*Portfolio/showcase: https://gitea.lab.audasmedia.com.au/sam/kontra (public) — README includes the interactive map, stack, and deploy story. Map: https://maps.lab.audasmedia.com.au/kontra_day/docs/kontra-architecture-map.html*
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