Shape

Bridge between intent clarification and implementation. Transforms WHAT into HOW.

When This Skill Activates

• After /hope:intent when spec_score >= 5
• Explicit request: "shape this", "how should I build this"
• Implementation approach questions
• Architecture decisions needed before coding

If spec_score < 5: Return to /hope:intent for clarification first.

Protocol

1. Aspect Discovery

Not all aspects apply to every task. Discover which are relevant:

Rule: Only shape aspects that appear in the spec or have clear dependencies.

2. Expert Consultation

For each relevant aspect, consult the appropriate expert:

See anchor-experts.md for detailed guidance.

3. Conflict Resolution

When experts disagree, apply the anchor hierarchy:

1. Hickey (simplicity) — "Is this genuinely simple, or just familiar?"
2. Fowler (pragmatism) — "Can I change this later without a rewrite?"
3. If still tied — Pick option with fewer dependencies

Document conflicts: Note which experts disagreed and why one was chosen.

4. SHAPE.md Output

Generate .loop/shape/SHAPE.md:

## Shape: [Task Name]

### Relevant Aspects
- [Aspect 1]: [Why relevant]
- [Aspect 2]: [Why relevant]

### Implementation Criteria

criteria:
- [Criterion 1 — Boolean, verifiable]
- [Criterion 2 — Specific outcome]
- [Criterion 3 — Measurable state]

### Must-NOT Constraints

mustNot:
- [Constraint 1 — What to avoid]
- [Constraint 2 — Anti-pattern to prevent]

### Verification Plan

| Criterion | Verification Type | Command/Method |
|-----------|------------------|----------------|
| [Criterion 1] | execution output | `npm test` |
| [Criterion 2] | observation | Visual check in browser |
| [Criterion 3] | measurement | Response time < 100ms |

### Expert Decisions

| Aspect | Expert | Recommendation | Confidence |
|--------|--------|----------------|------------|
| Data | Hickey | Use immutable events | 85% |
| API | Fowler | REST with HATEOAS | 75% |

### Conflicts Resolved

[If any experts disagreed, document here with reasoning]

See shape-template.md for full template.

Modes

Present Mode (Default)

Show reasoning, ask user on conflicts:

1. Display discovered aspects with evidence
2. Show expert recommendations
3. Pause on conflicts: "Hickey suggests X, Fowler suggests Y. Which aligns with your goals?"
4. Generate SHAPE.md after user approval

Autonomous Mode

Apply anchor hierarchy silently:

1. Discover aspects
2. Consult experts
3. Resolve conflicts using hierarchy
4. Generate SHAPE.md
5. Announce: [SHAPE] Generated .loop/shape/SHAPE.md | N criteria | M mustNot

Trigger autonomous: "shape this autonomously" or fit_score >= 40

Loop Integration

SHAPE.md feeds directly into /loop:start:

Exit blocked: If any criterion has verification type "assumption", exit_signal cannot be true.

Quality Footer

After generating SHAPE.md:

╭─ [VERDICT] ──────────────────────────────╮
│ Aspects: N shaped | Experts: M consulted │
│ Criteria: X | MustNot: Y                 │
│ Conflicts: Z resolved via hierarchy      │
├──────────────────────────────────────────┤
│ ↳ Alt: [alternative approach]            │
│ ↳ Key assumption: [main uncertainty]     │
╰──────────────────────────────────────────╯

Boundary

Shape surfaces considerations; user owns architecture.

• Expert recommendations are patterns, not prescriptions
• User resolves conflicts — hierarchy is a tiebreaker, not authority
• If user disagrees with expert guidance, user's context wins

Shape informs design decisions, never makes them.

References

• references/aspect-discovery.md — Detailed aspect signals
• references/anchor-experts.md — Expert philosophies and guidance
• references/shape-template.md — Full SHAPE.md template