diff --git a/AGENTS.md b/AGENTS.md
index 357b2e3..8c00bf1 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -35,6 +35,11 @@ You are an expert Software Engineer working on this project. Your primary respon
 *   **Context**: `./scripts/tasks context`
 *   **Update**: `./scripts/tasks update [ID] [status]`
 *   **Migrate**: `./scripts/tasks migrate` (Migrate legacy tasks to new format)
+*   **Link**: `./scripts/tasks link [ID] [DEP_ID]` (Add dependency).
+*   **Unlink**: `./scripts/tasks unlink [ID] [DEP_ID]` (Remove dependency).
+*   **Index**: `./scripts/tasks index` (Generate INDEX.yaml).
+*   **Graph**: `./scripts/tasks graph` (Visualize dependencies).
+*   **Validate**: `./scripts/tasks validate` (Check task files).
 *   **Memory**: `./scripts/memory.py [create|list|read]`
 *   **JSON Output**: Add `--format json` to any command for machine parsing.
 
diff --git a/docs/tasks/GUIDE.md b/docs/tasks/GUIDE.md
index 3d0a944..7fd2292 100644
--- a/docs/tasks/GUIDE.md
+++ b/docs/tasks/GUIDE.md
@@ -93,6 +93,19 @@ Use the `scripts/tasks` wrapper to manage tasks.
 
 # Migrate legacy tasks (if updating from older version)
 ./scripts/tasks migrate
+
+# Manage Dependencies
+./scripts/tasks link [TASK_ID] [DEPENDENCY_ID]
+./scripts/tasks unlink [TASK_ID] [DEPENDENCY_ID]
+
+# Generate Dependency Index (docs/tasks/INDEX.yaml)
+./scripts/tasks index
+
+# Visualize Dependencies (Mermaid Graph)
+./scripts/tasks graph
+
+# Validate Task Files
+./scripts/tasks validate
 ```
 
 ## Agile Methodology
diff --git a/docs/tasks/INDEX.yaml b/docs/tasks/INDEX.yaml
new file mode 100644
index 0000000..0d41258
--- /dev/null
+++ b/docs/tasks/INDEX.yaml
@@ -0,0 +1,12 @@
+# Task Dependency Index
+# Generated by scripts/tasks.py index
+
+docs/tasks/domain/DOMAIN-20251207-145243-TRR-remove-legacy-scraping.md:
+
+docs/tasks/features/FEATURES-20251207-145243-YWP-expand-ask-feature.md:
+
+docs/tasks/foundation/FOUNDATION-20251207-145244-BLD-update-documentation.md:
+
+docs/tasks/migration/MIGRATION-20251207-145243-IMK-complete-gcp-migration.md:
+
+docs/tasks/migration/MIGRATION-20251212-034235-XNE-update-harness-to-latest-version.md:
diff --git a/docs/tasks/foundation/FOUNDATION-20251207-145244-BLD-update-documentation.md b/docs/tasks/foundation/FOUNDATION-20251207-145244-BLD-update-documentation.md
index c08eb4c..5ee2e45 100644
--- a/docs/tasks/foundation/FOUNDATION-20251207-145244-BLD-update-documentation.md
+++ b/docs/tasks/foundation/FOUNDATION-20251207-145244-BLD-update-documentation.md
@@ -1,6 +1,6 @@
 ---
 id: FOUNDATION-20251207-145244-BLD
-status: in_progress
+status: completed
 title: Update Documentation
 priority: medium
 created: 2025-12-07 14:52:44
@@ -9,4 +9,17 @@ category: foundation
 
 # Update Documentation
 
-Align documentation with vibe-bootstrapper standards.
+Align documentation with vibe-bootstrapper standards and document new task management capabilities.
+
+## Task Details
+The `scripts/tasks.py` utility has been updated with new "skills": `index`, `link`, `unlink`, `graph`, and `validate`. The documentation in `AGENTS.md` and `docs/tasks/GUIDE.md` needs to be updated to reflect these changes.
+
+### Acceptance Criteria
+- [x] `docs/tasks/GUIDE.md` updated with new commands.
+- [x] `AGENTS.md` updated with new commands.
+- [x] `docs/tasks/INDEX.yaml` generated and verified.
+
+## Implementation Status
+### Completed Work
+- [x] Update GUIDE.md
+- [x] Update AGENTS.md
diff --git a/scripts/tasks b/scripts/tasks
old mode 100644
new mode 100755