test: prove unrelated project isolation

SLICE_HISTORY.md

@@ -250,3 +250,41 @@ DFG-5B: complete the full-family shadow proof when AssetForge is explicitly auth
 ### Next gate
 
 DFG-6: prove the generic core with an unrelated project and simultaneous project-isolated servers.
+
+## DFG-6 unrelated-project proof
+
+### Changed
+
+- Added an Awesome Ski Game fixture using the generic project descriptor, five unrelated node
+  families, six relationships, a bounded `ride-day` context, one proposal writer, and one declared
+  field-guide view.
+- Added an end-to-end proof covering generic loading, indexing, exact graph counts, search, filters,
+  dependency traversal, deterministic bounded context, isolated updates, validation, diffs, and
+  escaped preview rendering.
+- Added a source guard that rejects Worldforge, AssetForge, phase, or villager vocabulary in the
+  generic core.
+- Added a live isolation proof with two simultaneous MCP server subprocesses bound to Awesome Ski
+  Game and Alpha Documentation.
+
+### Verification
+
+- Awesome Ski Game loaded through `adapter = "generic"` with five nodes, six edges, and trail,
+  riding, safety, session, and proof families.
+- The 300-token context retained its required session node, stayed within budget, recorded
+  omissions, and reproduced exactly.
+- The proposal changed only its isolated changeset and preview. Canonical sources and declared
+  output remained unchanged, and raw HTML was escaped.
+- Both live servers returned their own project identity and nodes, rejected the other project's
+  stable IDs, and wrote same-named changesets and previews only under their bound roots.
+- The complete DocForge suite passes with warnings treated as errors.
+
+### Limits
+
+- This proof does not adopt DocForge inside Worldforge or enable any canonical write path.
+- The Worldforge adapter and generic Awesome Ski Game fixture remain separate ownership paths.
+- HTTP transport, accounts, and web administration remain unopened.
+
+### Next gate
+
+DFG-7: adopt project-bound DocForge retrieval for real Worldforge read-only tasks with measured
+quality and a documented rollback path.