Add Cloud Agent development environment for Berd

[praxstack]

Overview

Category: infrastructure

User Impact: Cloud Agents can bootstrap the Berd repository with pinned Hermit tools, Linux Tauri dependencies, and the managed Goose backend without manual setup.

Problem: Berd has no committed Cloud Agent environment configuration, so agents start from a generic image and cannot reliably run just setup, frontend checks, Rust checks, or dev workflows.

Solution: Add a repo-managed .cursor/environment.json with a Linux Dockerfile for Tauri/Goose build prerequisites and an idempotent install script that activates Hermit, installs pnpm dependencies, builds the SDK, and compiles the pinned Goose backend.

Validation

The environment was validated end-to-end on this branch:

Check	Result
Install idempotence	Passed twice
just check	Passed
just test	7222 passed
just tauri-check	Passed
just build	Passed
Vite dev server	HTTP 200 at localhost:5173
Goose backend	goose --version → 1.48.0
Fresh Cloud Agent (build bld-20260829-afa8e0cc-8939-4db5-9347-30904f29085f)	All checks passed

File changes

.cursor/Dockerfile
Ubuntu 24.04 base image with Linux Tauri dependencies (webkitgtk, GTK, appindicator), C++ toolchain for Goose/llama-cpp, and common build utilities.

.cursor/environment.json
Repo-managed Cloud Agent configuration pointing at the Dockerfile and install script.

scripts/cloud-agent-install.sh
Idempotent bootstrap: activate Hermit, run just _setup-dev-deps, and build the pinned Goose backend.

  

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