[Feature]: What-if analysis for spec requirement changes

[Quratulain-bilal]

Problem Statement

Feature Request

Problem:
Before modifying a spec, there's no way to preview the downstream impact. Teams ask "what happens if we
drop this requirement?" or "what if we add OAuth?" — but today the only way to find out is to actually
make the change, re-run plan/tasks, and manually compare. This is slow and risky.

Proposed Solution

Feature Request

Problem:
Before modifying a spec, there's no way to preview the downstream impact. Teams ask "what happens if we
drop this requirement?" or "what if we add OAuth?" — but today the only way to find out is to actually
make the change, re-run plan/tasks, and manually compare. This is slow and risky.

Output would include:

• Complexity score before vs after
• Tasks added/removed/changed
• Effort delta (hours gained or lost)
• Risk assessment of the change
• Side-by-side diff preview

Why this matters:

• Enables data-driven spec decisions before committing to changes
• Prevents "let's just try it" changes that cascade into scope creep
• Gives product managers a tool to evaluate trade-offs quantitatively
• Completely read-only — no files modified, pure simulation

Alternatives Considered

Output would include:

• Complexity score before vs after
• Tasks added/removed/changed
• Effort delta (hours gained or lost)
• Risk assessment of the change
• Side-by-side diff preview

Why this matters:

• Enables data-driven spec decisions before committing to changes
• Prevents "let's just try it" changes that cascade into scope creep
• Gives product managers a tool to evaluate trade-offs quantitatively
• Completely read-only — no files modified, pure simulation

Component

Other

AI Agent (if applicable)

None

Use Cases

No response

Acceptance Criteria

No response

Additional Context

No response