diff --git a/docs/INDEX.md b/docs/INDEX.md
index 35c9d7a..2c75d0a 100644
--- a/docs/INDEX.md
+++ b/docs/INDEX.md
@@ -47,6 +47,7 @@ Auto-generated on 2026-05-11 from front-matter and headings.
 | [M9 — Actief Product Backlog](./plans/M9-active-product-backlog.md) | active | 2026-05-03 |
 | [PBI-79: Product Backlog workflow — sprint-membership via vinkjes](./plans/PBI-79-backlog-sprint-workflow.md) | — | — |
 | [Queue-loop verplaatsen van Claude naar runner](./plans/queue-loop-extraction.md) | — | — |
+| [Sprint MCP-tools — create_sprint & update_sprint](./plans/sprint-mcp-tools.md) | draft | 2026-05-11 |
 | [Advies - SprintRun, PR en worktree lifecycle als state machines](./plans/sprint-pr-worktree-state-machines.md) | draft | 2026-05-06 |
 | [ST-1109 — PBI krijgt een status (Ready / Blocked / Done)](./plans/ST-1109-pbi-status.md) | active | 2026-05-03 |
 | [ST-1110 — Demo gebruiker read-only](./plans/ST-1110-demo-readonly.md) | active | 2026-05-03 |
@@ -122,6 +123,7 @@ Auto-generated on 2026-05-11 from front-matter and headings.
 | [Vercel Deployment](./runbooks/deploy-vercel.md) | `runbooks/deploy-vercel.md` | active | 2026-05-03 |
 | [Job-model-selectie per ClaudeJob-kind](./runbooks/job-model-selection.md) | `runbooks/job-model-selection.md` | active | 2026-05-09 (idea-kinds + PLAN_CHAT permission_mode → acceptEdits) |
 | [MCP Integration — Scrum4Me Tools](./runbooks/mcp-integration.md) | `runbooks/mcp-integration.md` | active | 2026-05-08 |
+| [Plan → Sprint/PBI/Story/Task workflow](./runbooks/plan-to-pbi-flow.md) | `runbooks/plan-to-pbi-flow.md` | draft | 2026-05-11 |
 | [v1.0 Smoke Test Checklist](./runbooks/v1-smoke-test.md) | `runbooks/v1-smoke-test.md` | active | 2026-05-04 |
 | [Worker idempotency & job-status protocol](./runbooks/worker-idempotency.md) | `runbooks/worker-idempotency.md` | active | 2026-05-09 |
 | [Scrum4Me — API Test Plan](./test-plan.md) | `test-plan.md` | active | 2026-05-03 |
diff --git a/docs/runbooks/mcp-integration.md b/docs/runbooks/mcp-integration.md
index c6fb2b4..d838c4f 100644
--- a/docs/runbooks/mcp-integration.md
+++ b/docs/runbooks/mcp-integration.md
@@ -23,6 +23,12 @@ Scrum4Me heeft een eigen MCP-server in repo [`madhura68/scrum4me-mcp`](https://g
 - `mcp__scrum4me__create_story` — `{ pbi_id, title, description?, acceptance_criteria?, priority, sort_order? }`; product_id afgeleid uit PBI; status=OPEN
 - `mcp__scrum4me__create_task` — `{ story_id, title, description?, implementation_plan?, priority, sort_order? }`; sprint_id geërfd van story; status=TO_DO
 
+**Sprint-lifecycle (PBI-12):**
+- `mcp__scrum4me__create_sprint` — `{ product_id, code?, sprint_goal, start_date? }`; status start altijd op `OPEN`; code auto-gegenereerd als `S-{YYYY-MM-DD}-{N}` per product per dag als niet meegegeven; géén reuse-check op bestaande OPEN-sprints
+- `mcp__scrum4me__update_sprint` — `{ sprint_id, status?, sprint_goal?, start_date?, end_date? }`; minimaal één veld vereist; **géén state-machine validatie** (last-write-wins, het resubmit/heropen-pad zit elders); auto-`end_date=vandaag` bij status → `CLOSED`/`FAILED`/`ARCHIVED` zonder expliciete end_date
+
+> Wanneer en hoe deze sprint-tools in de plan-flow gebruikt worden: zie [docs/runbooks/plan-to-pbi-flow.md](./plan-to-pbi-flow.md).
+
 > Idea-aanmaak loopt niet via MCP maar via de UI of `POST /api/ideas`. De voormalige `create_todo`-tool is verwijderd; idea-mutaties gaan via de Idea-tools onder *Idea-laag (M12)* hieronder.
 
 **Task / story writes:**