migrate mosaic home to xdg config path

runtime/opencode/AGENTS.md

@@ -1,7 +1,7 @@
 # Mosaic Runtime Adapter — OpenCode
 
 Load and apply in this order:
-1. `~/.mosaic/STANDARDS.md`
+1. `~/.config/mosaic/STANDARDS.md`
 2. repo-local `AGENTS.md` (and `SOUL.md` when present)
 
 This file is an OpenCode adapter layer. It does not replace project guidance.
@@ -10,19 +10,19 @@ This file is an OpenCode adapter layer. It does not replace project guidance.
 
 - OpenCode sessions may not expose a native subagent/background task primitive in all deployments.
 - When native subagent delegation is unavailable, use Mosaic's deterministic orchestrator rail:
-  - `~/.mosaic/bin/mosaic-orchestrator-matrix-cycle`
+  - `~/.config/mosaic/bin/mosaic-orchestrator-matrix-cycle`
 - Keep repo task tracking in `docs/tasks.md` as the canonical human-readable state.
 - Keep machine transport/controller state in `.mosaic/orchestrator/`.
 
 ## Fallback Delegation Mode (No Native Subagents)
 
 1. Bootstrap repo if needed:
-   - `~/.mosaic/bin/mosaic-bootstrap-repo /path/to/repo`
+   - `~/.config/mosaic/bin/mosaic-bootstrap-repo /path/to/repo`
 2. Configure `.mosaic/orchestrator/config.json`:
    - set `"enabled": true`
    - set `"worker.command_template"` to your OpenCode worker command
 3. Queue work items in `.mosaic/orchestrator/tasks.json` (or via Matrix command ingestion).
 4. Run deterministic ticks:
-   - `~/.mosaic/bin/mosaic-orchestrator-matrix-cycle`
+   - `~/.config/mosaic/bin/mosaic-orchestrator-matrix-cycle`
 
 This preserves rails enforcement (`quality_gates`) even without runtime-native subagent features.