Build loop pipeline — implement all MVP modules

[jeevanpillay]

Summary

Implemented the full MVP via the build loop pipeline. This single PR delivered all 6 core modules, E2E test infrastructure, reverse proxy, and CI pipeline.

Modules implemented

1. CLI — clap-based command framework (dual new, dual rm, dual ls, dual shell)
2. Config — TOML config parsing and workspace discovery
3. Clone — Full git clone lifecycle (create, delete, list)
4. Container — Docker container lifecycle management
5. Shell — Command routing and shell integration
6. Tmux — Terminal session backend (create, attach, detach, destroy)

Additional work

• Reverse proxy with subdomain routing
• E2E test infrastructure with RAII harness and fixtures
• CI pipeline
• Research docs and implementation plans in thoughts/

PR

• PR #105

Related Phase 0 issues (all completed by this work)

• DUAL-12: Config format and workspace discovery
• DUAL-13: Clone management
• DUAL-14: Tmux backend
• DUAL-15: Fuzzy workspace switcher
• DUAL-16: CLI framework and command wiring

Retroactively created — this work was done on Feb 13, 2026.

[linear]

DUAL-39