Preferring throwaway code over design docs
Software engineers weigh the merits of writing design documents versus rapidly building “throwaway” prototypes to explore solutions. Proponents of prototyping argue that concrete code reveals real constraints, surfaces unknowns, and aligns stakeholders more effectively than abstract diagrams, especially in messy or poorly understood problem spaces. Others counter that clear, concise design docs are essential for capturing intent, trade‑offs, timelines, and cross‑team coordination—particularly in larger organizations—and warn that prototypes often escape their “throwaway” status and become fragile production systems if planning is neglected.
Role of design docs vs. throwaway code
- Many report rarely seeing design docs that actually guide implementation; some see them mostly as performative or for management.
- Others argue design docs are crucial for capturing goals, constraints, alternatives considered, and especially “why” certain choices were made.
- Several emphasize that code and design docs serve different purposes: protos prove feasibility; docs communicate intent, trade‑offs, and scope.
Value and risks of prototyping / “throwaway” code
- Strong support for prototypes as the fastest way to:
- Discover unknown constraints, integration issues, and data problems.
- Clarify requirements with stakeholders via “show, don’t tell.”
- Learn new tools/technologies and de‑risk hard technical choices.
- Multiple people note that “throwaway” prototypes almost never get thrown away; they are frequently shipped or become the basis of production.
- Shipping prototypes can generate outsized business value quickly, but also long‑term tech debt that is hard to unwind.
Documentation, communication, and audience
- Design docs (or ADRs, technical analyses, whiteboard diagrams) are seen as:
- Easier to review than large PRs.
- More accessible to non‑developers, and better for alignment across teams.
- Helpful for onboarding, architecture understanding, and future “code archaeology.”
- Others prefer rich draft PRs / issues as living design threads, with design docs treated as historical snapshots rather than always up to date.
- Several stress that good writing is hard; many design docs are unreadable or ignored without careful editing.
Planning, estimation, and project scale
- Some argue “how long will it take?” is inherently unknowable; time‑boxed discovery/prototyping is more honest.
- Others say timelines are unavoidable in B2B, competitive, or large‑product contexts; estimates drive prioritization and contracts.
- There’s broad agreement that:
- Prototyping is better when technical unknowns dominate.
- Design docs and up‑front planning are more critical for large, cross‑team, safety‑critical, or complex systems.
Hybrid and cultural considerations
- Many advocate a hybrid: sketch a design, prototype to learn, then refine and document a stable design.
- Organizational culture often:
- Punishes “wasted” prototypes and rewards shipping, pushing prototypes into production.
- Uses design docs for performance/promotion even when they’re weak engineering tools.
- Overall consensus: the real goal is deep thinking and shared understanding; whether that’s best achieved via docs, prototypes, or both is context‑ and team‑dependent.