Add Wave general-purpose pipelines

ADR, changelog, code-review, debug, doc-sync, explain, feature,
hotfix, improve, onboard, plan, prototype, refactor, security-scan,
smoke-test, speckit-flow, supervise, test-gen, and more.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.wave/pipelines/housekeeping.yaml

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+kind: WavePipeline
+metadata:
+  name: housekeeping
+  description: "Audit and repair Zettelkasten link health, orphans, and index completeness"
+  release: true
+
+input:
+  source: cli
+  examples:
+    - ""
+    - "orphans only"
+    - "dangling links only"
+
+steps:
+  - id: audit
+    persona: navigator
+    workspace:
+      mount:
+        - source: ./
+          target: /project
+          mode: readonly
+    exec:
+      type: prompt
+      source: |
+        Audit the Zettelkasten for health issues.
+
+        ## Steps
+
+        1. **Find orphans**: Run `notesium list --orphans`
+           - For each orphan, read the note to understand its content
+           - Suggest which existing note it should be linked from
+
+        2. **Find dangling links**: Run `notesium links --dangling`
+           - For each dangling link, identify the source file and broken target
+           - Suggest whether to retarget or remove the link
+
+        3. **Get stats**: Run `notesium stats`
+           - Record total notes, total links, label count
+
+        4. **Check index completeness**: Read the index note
+           - Compare sections listed in the index against known sections
+           - Identify any sections or major topics missing from the index
+
+        5. **Find dead ends**: Run `notesium links` to get all links
+           - Identify notes that have outgoing links but no incoming links
+           - These are reachable only via search, not by traversal
+
+        ## Output
+
+        Write the result as JSON to output/audit-report.json matching the contract schema.
+        Include:
+        - orphans: list with filename, title, suggested_connection
+        - dangling_links: list with source_filename, target_filename, link_text, suggested_fix
+        - stats: total_notes, total_links, label_notes, orphan_count, dangling_count, avg_links_per_note
+        - index_gaps: list with section, description, suggested_entry_point
+        - dead_ends: list with filename, title, outgoing_links count
+        - timestamp: current ISO 8601 timestamp
+    output_artifacts:
+      - name: audit-report
+        path: output/audit-report.json
+        type: json
+    handover:
+      contract:
+        type: json_schema
+        source: output/audit-report.json
+        schema_path: .wave/contracts/audit-report.schema.json
+        on_failure: retry
+        max_retries: 2
+
+  - id: repair
+    persona: scribe
+    dependencies: [audit]
+    memory:
+      inject_artifacts:
+        - step: audit
+          artifact: audit-report
+          as: audit
+    workspace:
+      mount:
+        - source: ./
+          target: /project
+          mode: readwrite
+    exec:
+      type: prompt
+      source: |
+        Repair issues found in the Zettelkasten audit.
+
+        Read the audit report: cat artifacts/audit
+
+        ## Steps
+
+        1. **Fix orphans**: For each orphan in the report:
+           - Read the orphan note and the suggested_connection note
+           - Add a contextual link from the suggested note to the orphan
+           - Explain *why* the connection exists
+
+        2. **Fix dangling links**: For each dangling link:
+           - If suggested_fix is "retarget": find the correct target note and update the link
+           - If suggested_fix is "remove": delete the broken link from the source file
+
+        3. **Fix index gaps**: For each index gap:
+           - Read the index note
+           - Add the missing keyword → entry point mapping
+           - Use the suggested_entry_point from the audit
+
+        4. **Skip dead ends** if the count is large — only fix the most obvious ones
+           (notes that clearly belong in an existing Folgezettel sequence)
+
+        5. **Commit all fixes**:
+           - `git add *.md`
+           - Count the total issues fixed
+           - `git commit -m "housekeeping: fix {n} issues"`
+
+        6. **Write repair log** to output/repair-log.md:
+           - Number of orphans linked
+           - Number of dangling links fixed
+           - Number of index entries added
+           - List of files modified
+    output_artifacts:
+      - name: repair-log
+        path: output/repair-log.md
+        type: markdown