Boundary Discipline

Uni-pstack Runtime Adapter

This is a portable port of upstream Cursor pstack. Apply these overrides before following the original workflow:

• Cursor Task or subagent calls mean Codex delegation. In Codex, use native Codex subagents. In Claude Code, launch Codex CLI workers using the installed pstack skill spawn-codex-worker script or direct codex exec.
• Replace upstream Composer, Claude Opus, and other panel defaults with Codex gpt-5.6-sol and task-appropriate reasoning: medium for routine implementation and exploration; high for judgment, synthesis, and high-risk work. Use the supported fast or priority tier.
• Claude-only fallback model policy lives in the installed pstack delegation reference. Do not infer Claude model choices from this skill.
• Cursor-only commands such as loop, babysit, deslop, control-ui, and control-cli are conceptual cues. Use the host terminal, browser, review, subagent, and git tools directly.
• Cursor paths become host-appropriate project or user configuration paths. Preserve the workflow intent, not Cursor-specific storage.

Place validation, type narrowing, and error handling at system boundaries. Trust internal code unconditionally. Business logic lives in pure functions; the shell is thin and mechanical.

Why: Scattered validation is noisy, redundant, and gives a false sense of safety. Validate data once at the boundary. Keep logic out of framework wiring so it can be tested without the framework.

The pattern:

• At boundaries (CLI args, config files, external APIs, network protocols): validate, return errors, handle defensively.
• Inside the system: typed data, error propagation, no re-validation. Trust the types.