feat(design-thinking): create dt-method-04-deep.instructions.md (#709)

# Pull Request

## Description

Create on-demand deep instruction file for Method 4: Brainstorming
(`dt-method-04-deep.instructions.md`). This file extends the
method-tier's Ideation Facilitator and Convergence Guide coaching hats
with:

- **Advanced Facilitation Techniques** (5 techniques): Brainwriting
Protocol (6-3-5), Morphological Analysis, Provocation Technique (Po),
Attribute Listing and Modification, Round-Robin Forced Connections
- **Creative Block Recovery** (4 techniques): Assumption Reversal,
Random Input Technique, Constraint Manipulation, Cross-Domain
Perspective Adoption
- **Advanced Convergence Frameworks** (4 frameworks): Impact/Effort
Matrix, Dot Voting with Constraints, Concept Clustering with Gap
Analysis, Weighted D/F/V Scoring
- **Cross-Pollination from Analogous Industries** (4 subsections):
Manufacturing→Software, Healthcare→Manufacturing, Energy→Healthcare,
Analogy Mining Protocol

Includes solo/AI-coach adaptations for brainwriting and dot voting
techniques. Differentiates cross-domain perspective adoption from
method-tier's in-domain perspective shifting.

4 H2 sections, 17 H3 subsections, 17 coaching prompts, ~214 lines.

## Related Issue(s)

Closes #600

## Type of Change

Select all that apply:

**Code & Documentation:**

- [x] New feature (non-breaking change adding functionality)

**AI Artifacts:**

- [x] Reviewed contribution with `prompt-analyze` agent and addressed
all feedback
- [x] Copilot instructions (`.github/instructions/*.instructions.md`)

## Sample Prompts (for AI Artifact Contributions)

**User Request:**
"I'm coaching a brainstorming session and my team has run out of ideas
after only generating 8 concepts. The three basic techniques from the
method-tier aren't producing enough variety."

**Execution Flow:**
1. DT coach detects Method 4 brainstorming context from
`.copilot-tracking/dt/**/method-04*` artifacts
2. Coach loads `dt-method-04-deep.instructions.md` for advanced guidance
3. Coach identifies creative block scenario → navigates to Creative
Block Recovery section
4. Coach applies Assumption Reversal technique with coaching prompt:
"What are you assuming must be true here? What solutions appear if that
assumption is reversed?"
5. If block persists, coach escalates through Random Input, Constraint
Manipulation, then Cross-Domain Perspective Adoption

**Output Artifacts:**
Additional divergent ideas captured in
`.copilot-tracking/dt/{project-slug}/method-04-brainstorming/divergent-ideas.md`,
documented with the technique that generated each idea.

**Success Indicators:**
- Ideation momentum recovers and team exceeds 15-idea minimum target
- Ideas span 4-6 different solution categories
- Coaching prompts produce actionable responses, not confusion
- Solo users with AI coach can apply brainwriting and dot voting using
the adaptation guidance

## Testing

- Executed prompt-analyze workflow: 21/23 pass, 2 warnings (resolved)
- Addressed F-02 (major): added solo/AI-coach adaptations for
Brainwriting and Dot Voting
- Addressed F-06 (minor): renamed "Perspective Shifting" to
"Cross-Domain Perspective Adoption"
- Validation rerun: all 9 regression checks pass

## Checklist

### Required Checks

- [x] Documentation is updated (if applicable)
- [x] Files follow existing naming conventions
- [x] Changes are backwards compatible (if applicable)
- [ ] Tests added for new functionality (if applicable)

### AI Artifact Contributions

- [x] Used `/prompt-analyze` to review contribution
- [x] Addressed all feedback from `prompt-builder` review
- [x] Verified contribution follows common standards and type-specific
requirements

### Required Automated Checks

The following validation commands must pass before merging:

- [x] Markdown linting: `npm run lint:md` — ✅ 233 files, 0 errors
- [x] Spell checking: `npm run spell-check` — ✅ 162 files, 0 issues
(added "brainwriting" to `.cspell.json` dictionary)
- [x] Frontmatter validation: `npm run lint:frontmatter` — ✅ 0 errors, 0
warnings
- [x] Skill structure validation: `npm run validate:skills` — ✅ 2
skills, 0 errors
- [ ] Link validation: `npm run lint:md-links` — ⚠️ Pre-existing: ESM
incompatibility
- [ ] PowerShell analysis: `npm run lint:ps` — ⚠️ Pre-existing: 3
warnings in gitignored sandbox script
- [x] Plugin freshness: `npm run plugin:generate` — ✅ 11 plugins
generated, 125 artifacts

## Security Considerations

- [x] This PR does not contain any sensitive or NDA information
- [x] Any new dependencies have been reviewed for security issues
- [x] Security-related scripts follow the principle of least privilege

## Additional Notes

- Structural precedent: `dt-method-02-deep.instructions.md` (most recent
merged deep file)
- Collection manifests updated: `design-thinking.collection.yml`,
`hve-core-all.collection.yml`, `design-thinking.collection.md`
- Plugins regenerated via `npm run plugin:generate`
- `applyTo: '**/.copilot-tracking/dt/**/method-04*'` per reviewer
feedback pattern from prior PRs

---------

Co-authored-by: Manasa Gudimella <mgudimella@microsoft.com>
Co-authored-by: Bill Berry <wbery@microsoft.com>

Author: 3 people

.cspell.json

@@ -61,6 +61,7 @@
   ],
   "words": [
     "behaviour",
+    "brainwriting",
     "learning",
     "ˈpræksɪs",
     "πρᾶξις"

.github/instructions/design-thinking/dt-method-04-deep.instructions.md

@@ -17,6 +17,7 @@ This collection includes agents, prompts, and instructions for:
 - **DT Method 02 Deep: Advanced Design Research** — On-demand deep reference covering advanced interview techniques, ethnographic observation methods, evidence triangulation, and manufacturing research patterns; loaded by the coach for complex research scenarios requiring specialist guidance
 - **DT Method 03: Input Synthesis** — Pattern recognition, theme development, synthesis validation, and Problem-to-Solution Space transition readiness for transforming fragmented research data into unified problem understanding
 - **DT Method 03 Deep** — Advanced affinity analysis with multi-pass clustering, insight frameworks with observation-inference-insight formula, HMW question scaffolding, problem statement articulation, and manufacturing synthesis patterns
+- **DT Method 04 Deep: Advanced Brainstorming Techniques** — Advanced facilitation techniques (brainwriting, morphological analysis, provocation), creative block recovery, convergence frameworks (impact/effort matrix, weighted D/F/V scoring), and cross-pollination from analogous industries loaded on-demand for complex Method 4 coaching scenarios
 - **DT Industry: Healthcare** — Healthcare-specific vocabulary mapping, constraints (HIPAA, patient safety, clinical workflow), empathy tools (patient journey mapping, clinician shadow), and an ED wait-time reference scenario for on-demand industry context loading
 - **DT→RPI Handoff Contract** — Exit-point definitions, artifact schemas, per-agent input contracts, graduation awareness behavior, and quality markers for lateral transitions from Design Thinking coaching into the RPI workflow
 - **DT RPI Research Context** — DT-aware task-researcher augmentation that frames research around stakeholder needs, quality-marked findings, assumption validation, and return path triggers when operating on DT artifacts

collections/design-thinking.collection.md

@@ -70,6 +70,9 @@ items:
   - path: .github/instructions/design-thinking/dt-method-03-deep.instructions.md
     kind: instruction
     maturity: experimental
+  - path: .github/instructions/design-thinking/dt-method-04-deep.instructions.md
+    kind: instruction
+    maturity: experimental
   - path: .github/instructions/design-thinking/dt-method-02-research.instructions.md
     kind: instruction
     maturity: experimental

collections/design-thinking.collection.yml

@@ -234,6 +234,9 @@ items:
 - path: .github/instructions/design-thinking/dt-method-04-brainstorming.instructions.md
   kind: instruction
   maturity: experimental
+- path: .github/instructions/design-thinking/dt-method-04-deep.instructions.md
+  kind: instruction
+  maturity: experimental
 - path: .github/instructions/design-thinking/dt-method-05-concepts.instructions.md
   kind: instruction
   maturity: experimental

collections/hve-core-all.collection.yml

@@ -44,6 +44,7 @@ copilot plugin install design-thinking@hve-core
 | dt-method-01-deep                    | Deep expertise for Method 1: Scope Conversations, covering advanced stakeholder analysis, power dynamics, and scope negotiation                                                                                                            |
 | dt-method-01-scope                   | Method 1 Scope Conversations coaching knowledge for Design Thinking: frozen vs fluid assessment, stakeholder discovery, constraint patterns, and conversation navigation                                                                   |
 | dt-method-03-deep                    | Deep expertise for Method 3: Input Synthesis — advanced affinity analysis, insight frameworks, and problem statement articulation                                                                                                          |
+| dt-method-04-deep                    | Deep expertise for Method 4: Brainstorming — advanced facilitation techniques, creative block recovery, and convergence frameworks                                                                                                         |
 | dt-method-02-research                | Method 2 Design Research coaching knowledge: interview techniques, research planning, environmental observation, and insight extraction patterns                                                                                           |
 | dt-method-02-deep                    | Deep expertise for Method 2: Design Research, covering advanced interview techniques, ethnographic observation, and evidence triangulation                                                                                                 |
 | dt-method-03-synthesis               | Method 3 Input Synthesis coaching knowledge: pattern recognition, theme development, synthesis validation, and Problem-to-Solution Space transition readiness                                                                              |

plugins/design-thinking/README.md

@@ -0,0 +1 @@
+../../../.github/instructions/design-thinking/dt-method-04-deep.instructions.md

plugins/design-thinking/instructions/dt-method-04-deep.md

@@ -123,6 +123,7 @@ copilot plugin install hve-core-all@hve-core
 | dt-method-03-deep                    | Deep expertise for Method 3: Input Synthesis — advanced affinity analysis, insight frameworks, and problem statement articulation                                                                                                                           |
 | dt-method-03-synthesis               | Method 3 Input Synthesis coaching knowledge: pattern recognition, theme development, synthesis validation, and Problem-to-Solution Space transition readiness                                                                                               |
 | dt-method-04-brainstorming           | Design Thinking Method 4: AI-assisted brainstorming with divergent ideation and convergent clustering for solution space entry                                                                                                                              |
+| dt-method-04-deep                    | Deep expertise for Method 4: Brainstorming — advanced facilitation techniques, creative block recovery, and convergence frameworks                                                                                                                          |
 | dt-method-05-concepts                | Design Thinking Method 5: User Concepts coaching with concept articulation, three-lens evaluation, and stakeholder alignment for Solution Space development                                                                                                 |
 | dt-method-06-lofi-prototypes         | Design Thinking Method 6: Lo-fi prototyping techniques, scrappy enforcement, feedback planning, and constraint discovery for Solution Space exit                                                                                                            |
 | dt-method-07-deep                    | Deep expertise for Method 7: High-Fidelity Prototypes; fidelity translation, architecture, and specification writing                                                                                                                                        |

plugins/hve-core-all/README.md

@@ -0,0 +1 @@
+../../../.github/instructions/design-thinking/dt-method-04-deep.instructions.md