Add SystemPrompt (self-hosted AI governance gateway)

[Ejb503]

Type of change

New app: SystemPrompt under Apps/SystemPrompt/.

What is this app

SystemPrompt is a self-hosted governance gateway for AI providers (Claude, OpenAI, Gemini): policy checks, secret scanning, audit trails, rate limits, and MCP orchestration. The app bundles the gateway with a Postgres 18 database.

• Image: ghcr.io/systempromptio/systemprompt-template:0.21.0 (pinned, published multi-arch for amd64 and arm64)
• Source: https://github.com/systempromptio/systemprompt-template
• Install docs: https://github.com/systempromptio/systemprompt-template/blob/main/docs/install/casaos.md

What changed

Adds Apps/SystemPrompt/ with:

• docker-compose.yml with a top-level x-casaos block per the v2 protocol reference (id: io.systemprompt.gateway, main, index, port_map, icon, locale-keyed title/tagline/description/tips/release_notes, category: Developer, version, update_at, website/repo/support/docs)
• icon.svg and screenshot-1.png app assets

How it was validated

• docker compose config -q passes on the app compose file.
• ./scripts/build_dist.sh completes without errors for this app: dist/index.json includes the app and dist/apps/io.systemprompt.gateway/ is generated with per-architecture compose files, meta.json, icon PNG fallback, and the optimized screenshot.
• The exact compose stack was booted end to end against the pinned image with a real provider key: first-boot database migrations complete, the container healthcheck passes, /health and /v1/models return 200, and a restart on the persisted volumes recovers cleanly.

Notes for reviewers

• At least one AI provider API key is required or the app will not start (documented in tips.before_install and in the env descriptions).
• POSTGRES_PASSWORD must be set before first start; the bundled database is initialised with it.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Ejb503]

Hi team, thanks for maintaining the store! This is my first submission here, so I hope I've followed the v2 conventions correctly. I went through the protocol docs and ran ./scripts/build_dist.sh locally, but if anything is off or doesn't match how you like apps packaged, just let me know and I'll fix it up quickly.

Happy to answer any questions about the app itself too. Feel free to reach out any time, either here or via the issues on our repo.