AI Feature Orchestrator: Prompt Files & Config (4/6), Fixes AB#3534744 (#398)

## Part 4: Prompt Files and Config

Adds prompt files (slash commands) and MCP configuration.

### Prompt Files

| Command | Purpose |
|---------|---------|
| `/feature-design` | Start a new feature  research + design spec |
| `/feature-plan` | Decompose approved design into PBIs |
| `/feature-backlog` | Create PBIs in Azure DevOps |
| `/feature-dispatch` | Dispatch PBIs to Copilot coding agent |
| `/feature-status` | Check tracked PR statuses |
| `/feature-continue` | Resume from current pipeline step |
| `/feature-pr-iterate` | Review a PR, analyze comments, iterate with
agent |

Each prompt file uses `agent: feature-orchestrator` to route to the
custom agent.

### Config
- `.vscode/mcp.json`  ADO MCP server (work items, repos, pipelines)
- `.gitignore` exceptions for `.vscode/mcp.json` and extension artifacts

**PR 4 of 6. Merge after Hooks (#397).**

Fixes
[AB#3534744](https://identitydivision.visualstudio.com/fac9d424-53d2-45c0-91b5-ef6ba7a6bf26/_workitems/edit/3534744)

Co-authored-by: pedro romero vargas <76129899+p3dr0rv@users.noreply.github.com>

Author: shahzaibj

.github/prompts/feature-backlog.prompt.md

@@ -0,0 +1,33 @@
+---
+agent: feature-orchestrator
+description: "Create approved PBIs as work items in Azure DevOps"
+---
+
+# Backlog Phase
+
+Read the PBI creator skill from #file:.github/skills/pbi-creator/SKILL.md
+
+## Your Task
+
+You are in the **Backlog** phase. The plan has been approved and you need to create PBIs in ADO.
+
+**Step 1**: Read the feature state:
+```powershell
+node .github/hooks/state-utils.js get-feature "<feature name>"
+```
+
+**Step 2**: Follow the **Creation Phase** instructions from the orchestrator agent:
+1. Pass the FULL plan to the `pbi-creator` subagent
+2. The pbi-creator will discover ADO defaults, present options via `askQuestion`, and create work items
+3. Present the creation summary with AB# IDs
+4. Use `askQuestion` to gate the next stage
+
+**Pipeline**: ✅ Design → ✅ Plan → 📝 **Backlog** → ○ Dispatch → ○ Monitor
+
+After PBIs are created, update state for EACH PBI:
+```powershell
+node .github/hooks/state-utils.js set-step "<feature name>" backlog_review
+node .github/hooks/state-utils.js add-pbi "<feature name>" '{"adoId":<id>,"title":"...","module":"...","status":"Committed","dependsOn":[<dep-ids>]}'
+```
+
+**IMPORTANT**: Use single quotes for JSON args in PowerShell.

.github/prompts/feature-continue.prompt.md

@@ -0,0 +1,41 @@
+---
+agent: feature-orchestrator
+description: "Resume working on a feature from its current pipeline step"
+---
+
+# Continue Feature
+
+## Your Task
+
+Resume working on a feature. The user will provide the feature name below.
+
+**Step 1**: Read the feature state:
+```powershell
+node .github/hooks/state-utils.js get-feature "<feature name>"
+```
+
+**Step 2**: Determine the current step from the `step` field and resume from there:
+
+| Step | What to do |
+|------|-----------|
+| `designing` | Continue writing the design spec |
+| `design_review` | Design is done — ask user if they want to plan PBIs. Use `askQuestion`. |
+| `planning` | Continue planning PBIs |
+| `plan_review` | Plan is done — ask user if they want to backlog in ADO. Use `askQuestion`. |
+| `backlogging` | Continue creating PBIs in ADO |
+| `backlog_review` | PBIs created — ask user if they want to dispatch. Use `askQuestion`. |
+| `dispatching` | Continue dispatching |
+| `monitoring` | Check PR status (follow Monitor phase instructions) |
+
+**Step 3**: Show the pipeline progress header:
+```
+## 🚀 Feature Orchestration: [Phase Name]
+
+**Feature**: [feature name]
+**Pipeline**: [show ✅/📋/○ for each stage based on current step]
+```
+
+Read `.github/copilot-instructions.md` for project context.
+
+**IMPORTANT**: Use single quotes for JSON args in PowerShell.
+Always update state after completing a phase step.

.github/prompts/feature-design.prompt.md

@@ -0,0 +1,31 @@
+---
+agent: feature-orchestrator
+description: "Start a new feature: research the codebase and write a design spec"
+---
+
+# Design Phase
+
+## Your Task
+
+You are in the **Design** phase. The user will describe a feature below.
+
+**Step 0**: Register the feature in state:
+```powershell
+node .github/hooks/state-utils.js add-feature '{"name": "<short feature name>", "step": "designing"}'
+```
+
+Then follow the **Full Flow** instructions from the orchestrator agent:
+1. Run the `codebase-researcher` subagent with a detailed prompt
+2. Pass the FULL research output to the `design-writer` subagent
+3. Present the design summary and use `askQuestion` to offer next steps
+
+**Pipeline**: 📝 **Design** → ○ Plan → ○ Backlog → ○ Dispatch → ○ Monitor
+
+Read `.github/copilot-instructions.md` for project context.
+
+**IMPORTANT**: Use single quotes for JSON args in PowerShell.
+After the design is complete, update state:
+```powershell
+node .github/hooks/state-utils.js set-step "<feature name>" design_review
+node .github/hooks/state-utils.js set-design "<feature name>" '{"docPath":"<path>","status":"approved"}'
+```

.github/prompts/feature-dispatch.prompt.md

@@ -0,0 +1,32 @@
+---
+agent: feature-orchestrator
+description: "Dispatch PBIs to GitHub Copilot coding agent for implementation"
+---
+
+# Dispatch Phase
+
+Read the dispatcher skill from #file:.github/skills/pbi-dispatcher/SKILL.md
+
+## Your Task
+
+You are in the **Dispatch** phase. PBIs have been created in ADO and you need to dispatch them.
+
+**Step 1**: Read the feature state to get PBI details:
+```powershell
+node .github/hooks/state-utils.js get-feature "<feature name>"
+```
+
+**Step 2**: Follow the **Dispatch Phase** instructions from the orchestrator agent:
+1. Run the `agent-dispatcher` subagent to dispatch PBIs to Copilot coding agent
+2. Record each dispatched PR in state
+3. Use `askQuestion` to gate the next stage
+
+**Pipeline**: ✅ Design → ✅ Plan → ✅ Backlog → 🚀 **Dispatch** → ○ Monitor
+
+After dispatch, update state:
+```powershell
+node .github/hooks/state-utils.js set-step "<feature name>" monitoring
+node .github/hooks/state-utils.js add-agent-pr "<feature name>" '{"repo":"<label>","prNumber":<n>,"prUrl":"<url>","status":"open","title":"<title>"}'
+```
+
+**IMPORTANT**: Use single quotes for JSON args in PowerShell.

.github/prompts/feature-plan.prompt.md

@@ -0,0 +1,32 @@
+---
+agent: feature-orchestrator
+description: "Decompose an approved design into repo-targeted PBIs"
+---
+
+# Plan Phase
+
+## Your Task
+
+You are in the **Plan** phase. The design has been approved and you need to break it into PBIs.
+
+**Step 1**: Read the feature state to find the design doc:
+```powershell
+node .github/hooks/state-utils.js get-feature "<feature name>"
+```
+
+**Step 2**: Read the design spec from `design-docs/` (the path is in the feature state).
+
+**Step 3**: Follow the **Planning Phase** instructions from the orchestrator agent:
+1. Pass BOTH research findings AND the design spec to the `feature-planner` subagent
+2. Present the structured plan with Summary Table + PBI Details
+3. Use `askQuestion` to gate the next stage
+
+**Pipeline**: ✅ Design → 📋 **Plan** → ○ Backlog → ○ Dispatch → ○ Monitor
+
+After planning is complete, update state:
+```powershell
+node .github/hooks/state-utils.js set-step "<feature name>" plan_review
+```
+
+**IMPORTANT**: Do NOT create ADO work items in this phase. Only produce the structured plan.
+Use single quotes for JSON args in PowerShell.

.github/prompts/feature-pr-iterate.prompt.md

@@ -0,0 +1,146 @@
+---
+agent: feature-orchestrator
+description: "Review a PR and post feedback for Copilot coding agent to iterate on"
+---
+
+# PR Iteration
+
+## Your Task
+
+Help the developer review and iterate on an agent-created pull request.
+The user will provide the feature name, repo, and PR number below.
+
+**Step 0**: Load feature context for deeper understanding:
+```powershell
+node .github/hooks/state-utils.js get-feature "<feature name>"
+```
+This returns the feature state including:
+- **Design spec path** (`artifacts.design.docPath`) — read this file to understand the intended design
+- **PBI details** (`artifacts.pbis`) — understand what this PR is supposed to implement
+- **Other PRs** (`artifacts.agentPrs`) — related work in the feature
+
+**Read the design spec** from the `docPath` to understand the architectural decisions,
+requirements, and intended approach. This context is essential for evaluating whether
+the PR correctly implements the design and for proposing informed resolutions to comments.
+
+**Step 1**: Fetch the PR details, diff, and **all review comments**:
+```powershell
+gh pr view <prNumber> --repo "<full-repo-slug>" --json title,body,state,additions,deletions,changedFiles,url
+gh pr diff <prNumber> --repo "<full-repo-slug>" | head -200
+```
+
+Then fetch **all review comments and conversation threads**:
+```powershell
+gh api "/repos/<owner>/<repo>/pulls/<prNumber>/comments" --jq '.[] | {path: .path, line: .line, body: .body, user: .user.login, created_at: .created_at}' 2>&1
+gh api "/repos/<owner>/<repo>/issues/<prNumber>/comments" --jq '.[] | {body: .body, user: .user.login, created_at: .created_at}' 2>&1
+gh pr view <prNumber> --repo "<full-repo-slug>" --json reviews --jq '.reviews[] | {state: .state, body: .body, author: .author.login}'
+```
+
+This gives you:
+- **Inline review comments** (file-specific feedback from reviewers)
+- **General PR comments** (conversation thread)
+- **Review decisions** (approved, changes requested, commented)
+
+Repo slug mapping:
+- `common` → `AzureAD/microsoft-authentication-library-common-for-android`
+- `msal` → `AzureAD/microsoft-authentication-library-for-android`
+- `broker` → `identity-authnz-teams/ad-accounts-for-android`
+- `adal` → `AzureAD/azure-activedirectory-library-for-android`
+
+Discover the GitHub username from `.github/developer-local.json`, or `gh auth status`.
+Switch account before any gh commands: `gh auth switch --user <username>`
+
+**Step 2**: Ask the developer how they want to handle the review feedback:
+
+```
+askQuestion({
+  question: "How would you like to handle the review feedback on this PR?",
+  options: [
+    { label: "🤖 Delegate to Copilot", description: "Tag @copilot to address all review comments automatically" },
+    { label: "📋 Show me the analysis first", description: "Present review feedback with proposed resolutions, then decide", recommended: true },
+    { label: "✅ Looks good — approve", description: "Approve the PR as-is" }
+  ]
+})
+```
+
+### If "Delegate to Copilot":
+
+Compose a single comprehensive `@copilot` comment that summarizes ALL reviewer feedback
+and post it on the PR:
+```powershell
+gh pr comment <prNumber> --repo "<slug>" --body "@copilot Please address the following review feedback:
+
+1. [summary of comment 1 with file/line reference]
+2. [summary of comment 2 with file/line reference]
+...
+
+Please fix all of the above and push updated commits."
+```
+
+Confirm the comment was posted and that the coding agent will pick it up.
+
+### If "Show me the analysis first":
+
+Analyze the PR and present a comprehensive review summary:
+
+**For each reviewer comment:**
+1. Show the comment (who said what, on which file/line)
+2. **Propose a resolution** — analyze the code and suggest what should change
+3. If a code change is needed, show a concrete code snippet or approach
+4. If the comment is a question, provide a clear answer based on codebase context
+
+Present as:
+```
+### Reviewer Feedback & Proposed Resolutions
+
+**Comment 1** — @reviewer on `src/MyFile.java:42`
+> "This should handle null case"
+**Resolution**: Add a null check before accessing the field. Proposed change:
+`if (value != null) { ... }`
+
+**Comment 2** — @reviewer (general)
+> "Missing unit tests for the retry logic"
+**Resolution**: Add tests for success, failure, and max-retry scenarios in `IpcRetryTest.java`.
+```
+
+Also include:
+- Overall PR summary (title, +/- lines, changed files)
+- Any patterns or systemic issues across the comments
+- Your recommendation
+
+Then ask what to do next:
+```
+askQuestion({
+  question: "How would you like to proceed?",
+  options: [
+    { label: "🤖 Delegate to Copilot agent", description: "Post @copilot comment with all the feedback to fix remotely" },
+    { label: "💻 Implement locally", description: "Checkout the branch and make changes in VS Code" },
+    { label: "✏️ I'll write custom feedback", description: "Let me type exactly what to tell the agent" }
+  ]
+})
+```
+
+**If "Delegate to Copilot agent"**: Post the structured feedback as an `@copilot` comment (same as above).
+
+**If "Implement locally"**: Checkout the PR branch in the correct repo directory:
+```powershell
+gh pr checkout <prNumber> --repo "<full-repo-slug>"
+```
+Run this in the correct sub-repo directory (common/, msal/, broker/, adal/).
+Then tell the developer: "Branch checked out. Make your changes, commit, and push."
+
+**If "I'll write custom feedback"**: Ask the developer to type their feedback, then post it
+as an `@copilot` comment on the PR.
+
+### If "Approve":
+
+```powershell
+gh pr review <prNumber> --repo "<slug>" --approve
+```
+
+Confirm the approval.
+
+## Final Step
+
+After any action, confirm what was done and suggest:
+"Use the feature detail panel's ↻ Refresh button to update PR status."

.github/prompts/feature-status.prompt.md

@@ -0,0 +1,49 @@
+---
+agent: feature-orchestrator
+description: "Check the status of agent-created pull requests for a feature"
+---
+
+# Monitor Phase
+
+## Your Task
+
+You are in the **Monitor** phase. Check the status of agent PRs for the feature.
+
+**Step 1**: Read the feature state to get tracked PRs:
+```powershell
+node .github/hooks/state-utils.js get-feature "<feature name>"
+```
+This returns `artifacts.agentPrs` — an array of `{repo, prNumber, prUrl, status, title}`.
+**Only check the PRs listed here — do NOT scan all repos.**
+
+**Step 2**: For each tracked PR, fetch live status:
+```powershell
+gh auth switch --user <discovered_username>
+gh pr view <prNumber> --repo "<full-repo-slug>" --json state,title,url,statusCheckRollup,additions,deletions,changedFiles,isDraft
+```
+
+Repo slug mapping:
+- `common` → `AzureAD/microsoft-authentication-library-common-for-android`
+- `msal` → `AzureAD/microsoft-authentication-library-for-android`
+- `broker` → `identity-authnz-teams/ad-accounts-for-android`
+- `adal` → `AzureAD/azure-activedirectory-library-for-android`
+
+Discover the GitHub username from `.github/developer-local.json`, or `gh auth status`, or prompt.
+
+**Step 3**: Present results in a table:
+
+```
+## 🚀 Feature Orchestration: Monitor
+
+**Pipeline**: ✅ Design → ✅ Plan → ✅ Backlog → ✅ Dispatch → 📡 **Monitor**
+
+| PR | Repo | Title | Status | Checks | +/- |
+|---|---|---|---|---|---|
+```
+
+**Step 4**: Update state with latest statuses:
+```powershell
+node .github/hooks/state-utils.js add-agent-pr "<feature name>" '{"repo":"...","prNumber":<n>,"prUrl":"...","status":"<open|merged|closed>","title":"..."}'
+```
+
+End with: "Use `@copilot` in PR comments to iterate with the coding agent."