[Luhaozhu]

Large MCP results could be counted several times through metadata, then disappear from the model context while their tool calls remained. This sync counts only model-facing tool-result fields, removes duplicated payload metadata, and preserves a clear placeholder when a result cannot fit its budget.

It also simplifies the built-in explorer/reviewer/worker roles. Built-ins inherit the parent's effective capabilities without adding grants. Role-specific read-only behavior now lives in role prompts rather than a separately narrowed tool surface.

My Space gains collapsible directory navigation, a narrow-screen drawer, synchronized ancestor expansion, clearer folder and permission styling, and streamlined file actions. Large streamed text patches skip per-grapheme animation to avoid blocking rendering.

Four additional OpenSandbox files differ only in formatting from public main.

This is the manifest-generated CE tree, compared against current public main; no private repository history is included.

Validation:

• All CE exclusion, required-file, binary allowlist, branding, license, import/OpenAPI/ORM, release regression, and frontend build gates passed.
• 60 targeted backend tests passed in both the source and iChain integration checkouts with external Redis disabled for test isolation.
• Full frontend build and module-page/chat-width browser checks passed.
• Full frontend lint still reports the existing 245 errors and 21 warnings.