chore(openspec): archive completed changes

- Archive config-secrets (FN-009) - 31 tasks complete
- Archive runfusion-poc (FN-008) - 25 tasks complete
- Archive deployment-config (FN-006) - 27 tasks complete
- All changes moved to openspec/changes/archive/

openspec/changes/archive/2026-05-14-runfusion-poc/proposal.md

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+## Why
+
+OpenCode is an AI-powered terminal-based development environment that provides a web interface for interactive development. It demonstrates the platform's extensibility beyond standard tools like code-server. As a POC, it validates the manifest-driven spawn system with a non-trivial runtime that requires web terminal forwarding.
+
+## What Changes
+
+- **OpenCode manifest**: Define the tool with terminal web interface, workspace mounts, and health checks
+- **Container image**: Reference to OpenCode image with built-in web terminal
+- **Health reporting**: Endpoint that reports tool health to the platform
+- **Spawn integration**: Reuse the spawn flow from FN-010 but with OpenCode-specific configuration
+- **Web terminal**: Support for browser-based terminal access
+
+## Capabilities
+
+### New Capabilities
+- `opencode-manifest`: OpenCode tool manifest with web terminal config
+- `web-terminal`: Support for browser-based terminal interfaces
+- `health-reporting`: Tool health status reporting mechanism
+
+### Modified Capabilities
+- None (reuses spawn infrastructure from FN-010)
+
+## Impact
+
+- **apps/api/app/tools/manifests/opencode.yml**: Updated manifest
+- **apps/api/app/services/spawn.py**: Minor updates for OpenCode-specific mounts
+- **apps/web/src/**: OpenCode appears in tool selection UI
+- **Docker images**: Uses official OpenCode image