Add "lessons/sprints/sprint-6---visual-branding-and-documentation-maintenance"

lessons%2Fsprints%2Fsprint-6---visual-branding-and-documentation-maintenance.-.md

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+# Sprint 6 - Visual Branding and Documentation Maintenance
+
+## Metadata
+- **Sprint:** Sprint 6 - Visual Branding Overhaul
+- **Issues:** #272, #273, #274, #275, #276, #277, #278
+- **PRs:** #284, #285
+
+## Context
+Implementing consistent visual headers across all 12 plugins with 109 files modified. Also discovered significant documentation drift during the process.
+
+## Key Learnings
+
+### 1. Background Agent Permission Limitations
+**Problem:** When spawning background agents via the Task tool for parallel work (agents a6d8fe7 and a6890a8), they were auto-denied Edit/Write/Bash permissions and couldn't complete their work.
+
+**Solution:** Had to complete the work manually in the main session where permissions were available.
+
+**Prevention:** Don't rely on background agents for tasks requiring file modifications. Either:
+- Run file-modifying tasks sequentially in main session
+- Use background agents only for read-only exploration/research
+- Accept that background agents work best for analysis, not implementation
+
+### 2. Documentation Drift Accumulates Silently
+**Problem:** During `/doc-audit`, discovered:
+- CLAUDE.md version was 5.1.0 when it should be 5.2.0
+- 10 plugin versions in marketplace.json didn't match CHANGELOG entries
+- 18 commands from Sprint 4 & 5 were missing from README.md and COMMANDS-CHEATSHEET.md
+
+**Solution:** Ran `/doc-sync` to batch-update all documentation in one commit.
+
+**Prevention:** 
+- Run `/doc-audit` at sprint close before lessons capture
+- Add documentation verification to sprint close checklist
+- Consider adding doc-coverage check to CI
+
+### 3. Documentation Coverage Gaps in Core Code
+**Problem:** Documentation coverage analysis revealed:
+- Overall: 69.6% (below 80% "Good" threshold)
+- gitea_client.py: Only 33% coverage with 32 undocumented public methods
+- NetBox tools: 50% coverage (class docs but no method docs)
+
+**Solution:** Identified as technical debt for future sprint.
+
+**Prevention:**
+- Add docstring requirements to PR review checklist
+- Consider adding doc coverage to CI (fail below 80%)
+- Prioritize documenting high-traffic files like gitea_client.py
+
+### 4. Visual Branding Template Efficiency
+**Problem:** Adding visual output sections to 109 files could have been tedious.
+
+**Solution:** Created Wiki specification pages first (branding/visual-spec, branding/plugin-registry, etc.) as single source of truth, then used consistent templates.
+
+**Prevention:**
+- Always create spec/template in Wiki before bulk implementation
+- Use search-and-add patterns for consistent sections
+- Group by plugin to maintain context
+
+## Tags
+documentation, visual-branding, background-agents, permissions, doc-audit, code-coverage, wiki, templates
+
+
+---
+**Tags:** documentation, visual-branding, background-agents, permissions, doc-audit, templates, sprint-6