v1.0.6

Added

• c4s-tools MCP server — exposes the cross-spec c4s ask Q&A flow over MCP, so it works in plan mode where Bash tools are filtered out. The plugin host registers MCP server factories and builds a fresh instance per turn.
• Brief "implemented" workflow, with a status pill and collapsible patch view in the UI.

Changed

• Extracted the shared ask logic into src/core/ask/run-ask.ts; the c4s ask CLI is now a thin wrapper over it.

Removed

• list_brief_versions / get_brief_version tools from the brief-tools MCP surface.

Fixed

• Restored a green client typecheck (tsconfig.client.json): widened the sidebar-tab icon contract to accept lucide-react's size?: number | string, and guarded Tag.counts[...] lookups against undefined under noUncheckedIndexedAccess.

Full Changelog: v1.0.5...v1.0.6