feat: add tool-request pipeline for automated tool creation

- Add pipeline spec at .claude/pipelines/tool-request.md
- Add workflow to trigger Claude on 'tool-request' label
- Add auto-close workflow for published issues (24h)
- Update claude.yml with write permissions and NPM_TOKEN
- Create labels: tool-request, claude-working, validation-failed, published, escalated

Pipeline flow:
1. Maintainer applies 'tool-request' label to issue
2. Claude analyzes, designs, implements, validates, publishes
3. Issue auto-closes 24h after successful publish

.github/workflows/tool-request.yml

@@ -0,0 +1,75 @@
+name: Tool Request Pipeline
+
+on:
+  issues:
+    types: [labeled]
+
+jobs:
+  trigger-claude:
+    # Only run when 'tool-request' label is added
+    if: github.event.label.name == 'tool-request'
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+
+    steps:
+      - name: Add working label
+        uses: actions/github-script@v7
+        with:
+          script: |
+            // Add 'claude-working' label to indicate processing has started
+            await github.rest.issues.addLabels({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+              labels: ['claude-working']
+            });
+
+      - name: Comment to trigger Claude
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const body = `@claude Please implement this tool request.
+
+**Instructions:**
+1. Read the pipeline specification at \`.claude/pipelines/tool-request.md\`
+2. Follow all steps: analyze, design, implement, validate, test, publish
+3. Update labels as you progress (remove \`claude-working\`, add \`published\` or \`validation-failed\`)
+4. Post full changelog when complete
+5. This issue will auto-close 24h after successful publish
+
+**Issue Context:**
+- Issue #${context.issue.number}
+- Author: @${context.payload.issue.user.login}
+- Created: ${context.payload.issue.created_at}
+
+Begin implementation.`;
+
+            await github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+              body: body
+            });
+
+  # Auto-close published issues after 24 hours
+  auto-close:
+    runs-on: ubuntu-latest
+    if: github.event.label.name == 'published'
+    permissions:
+      issues: write
+    steps:
+      - name: Schedule auto-close
+        uses: actions/github-script@v7
+        with:
+          script: |
+            // Add a comment about auto-close
+            await github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+              body: '**Note:** This issue will auto-close in 24 hours. Reply if you have feedback or issues with the published tool.'
+            });
+
+  # Separate workflow handles the actual auto-close via scheduled job
+  # See: .github/workflows/auto-close-published.yml