feat(mcp): support revision-guarded document updates

Preserve server-owned projections, stage Yjs changes before durable publication, retain idempotent results, and attribute live changes to the MCP client.

Co-authored-by: GPT-6 Astra <noreply@openai.com>

GAALAlex Lavaee and GPT-6 Astra authored last monthcommitted by Maggie Appleton

aa0aee7

Parent9882eb3

20 files changed+1972-54

StackedSplit

README.md+2 −2

apps/server/src/mcp.ts+119 −0

apps/server/src/mcp/create.ts+12 −2

apps/server/src/mcp/hosted.test.ts+182 −0

apps/server/src/mcp/hosted.ts+160 −18

apps/server/src/mcp/update-lifecycle.test.ts+533 −0

apps/server/src/mcp/update.test.ts+218 −0

apps/server/src/mcp/update.ts+92 −0

apps/server/src/plan/edit.test.ts+104 −0

apps/server/src/plan/edit.ts+175 −0

apps/server/src/plan/service.ts+169 −5

docs/architecture.md+8 −7

docs/channels.md+7 −3

docs/local-agent-mcp.md+42 −7

docs/storage.md+8 −5

e2e/mcp-update.e2e.ts+115 −0

packages/editor/src/changes-chip.tsx+9 −1

packages/editor/src/changes.ts+2 −0

packages/protocol/plan.d.ts+12 −3

skills/creating-chopin-plans/SKILL.md+3 −1