diff --git a/.agents/content.md b/.agents/content.md
index 516bfd9e..d9fae8c1 100644
--- a/.agents/content.md
+++ b/.agents/content.md
@@ -12,6 +12,7 @@ subagents:
   - editor
   - internal-linker
   - context-templates
+  - content-calendar
   # SEO integration
   - keyword-research
   - eeat-score
@@ -47,6 +48,7 @@ subagents:
 | `editor.md` | Transform AI content into human-sounding articles |
 | `internal-linker.md` | Strategic internal linking recommendations |
 | `context-templates.md` | Per-project SEO context templates (brand voice, style, keywords) |
+| `content-calendar.md` | Content calendar planning with gap analysis and lifecycle tracking |
 
 **SEO Analysis** (via `seo/`):
 
@@ -75,12 +77,13 @@ python3 ~/.aidevops/agents/scripts/seo-content-analyzer.py intent "search query"
 ```
 
 **Workflow**:
-1. Research (keywords, competitors, audience)
-2. Write (`content/seo-writer.md` with keyword targets)
-3. Analyze (`seo-content-analyzer.py analyze`)
-4. Optimize (address issues from analysis)
-5. Edit (`content/editor.md` for human voice)
-6. Publish (via WordPress or CMS)
+1. Plan (`tools/content/content-calendar.md` for gap analysis and scheduling)
+2. Research (keywords, competitors, audience)
+3. Write (`content/seo-writer.md` with keyword targets)
+4. Analyze (`seo-content-analyzer.py analyze`)
+5. Optimize (address issues from analysis)
+6. Edit (`content/editor.md` for human voice)
+7. Publish (via WordPress or CMS)
 
 <!-- AI-CONTEXT-END -->
 
diff --git a/.agents/seo.md b/.agents/seo.md
index b472b105..5df7d686 100644
--- a/.agents/seo.md
+++ b/.agents/seo.md
@@ -294,6 +294,7 @@ See `seo/image-seo.md` for the full workflow, `seo/moondream.md` for the vision
 ### Content Optimization
 
 Integrate with `content.md` for:
+- Content calendar planning and gap analysis (`tools/content/content-calendar.md`)
 - SEO-optimized content writing (`content/seo-writer.md`)
 - Meta title/description generation (`content/meta-creator.md`)
 - Internal linking strategy (`content/internal-linker.md`)
@@ -301,12 +302,13 @@ Integrate with `content.md` for:
 
 **Content analysis workflow** (from SEO Machine integration):
 
-1. **Research**: `/keyword-research` + `/autocomplete-research`
-2. **Write**: Use `content/seo-writer.md` with keyword targets
-3. **Analyze**: `seo-content-analyzer.py analyze` for quality score
-4. **Optimize**: Address issues from `seo/seo-optimizer.md`
-5. **Edit**: `content/editor.md` for human voice
-6. **Publish**: Via WordPress or CMS
+1. **Plan**: Use `tools/content/content-calendar.md` for gap analysis and scheduling
+2. **Research**: `/keyword-research` + `/autocomplete-research`
+3. **Write**: Use `content/seo-writer.md` with keyword targets
+4. **Analyze**: `seo-content-analyzer.py analyze` for quality score
+5. **Optimize**: Address issues from `seo/seo-optimizer.md`
+6. **Edit**: `content/editor.md` for human voice
+7. **Publish**: Via WordPress or CMS
 
 **Context templates** for per-project SEO configuration:
 
diff --git a/.agents/subagent-index.toon b/.agents/subagent-index.toon
index cbe7e563..2d7e2e8b 100644
--- a/.agents/subagent-index.toon
+++ b/.agents/subagent-index.toon
@@ -27,7 +27,7 @@ aidevops/,Framework internals - extending aidevops and architecture,setup|archit
 memory/,Cross-session memory - SQLite FTS5 storage,README
 seo/,Search optimization - keywords and rankings,dataforseo|serper|semrush|neuronwriter|google-search-console|gsc-sitemaps|site-crawler|eeat-score|analytics-tracking|bing-webmaster-tools|screaming-frog|rich-results|debug-opengraph|debug-favicon|contentking|programmatic-seo|schema-validator|content-analyzer|seo-optimizer|keyword-mapper
 content/,Content creation - copywriting and editorial,guidelines|humanise|seo-writer|meta-creator|editor|internal-linker|context-templates
-tools/content/,Content tools - summarization and extraction,summarize
+tools/content/,Content tools - calendar planning summarization and extraction,content-calendar|summarize
 tools/social-media/,Social media tools - X/Twitter LinkedIn and Reddit,bird|linkedin|reddit
 tools/build-agent/,Agent design - composing efficient agents,build-agent|agent-review|agent-testing
 tools/build-mcp/,MCP development - creating MCP servers,build-mcp|server-patterns|api-wrapper|transports|deployment