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feat(mcp): reconnect failed MCP servers in managed OpenCode

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OpenCode marks an MCP server failed when it does not come up at startup
or when a live connection drops, and never retries. A new managed plugin
reconnects those servers with a per-server backoff (1s doubling to a 30s
cap), wakes early on mcp.tools.changed, and stops on dispose. Only the
failed state is retried; disabled and auth states stay untouched.

The OPENCODE_CONFIG_CONTENT merge that agent-tool and system-prompt each
carried is now one shared helper so the three managed plugins compose.

Claude-Session: https://claude.ai/code/session_01VqV56Hez25hTxXH4ipJfzH
This commit is contained in:
Bohdan Triapitsyn
2026-09-04 22:56:27 +03:00
parent caac24ac3d
commit ce5c0c068e
8 changed files with 375 additions and 45 deletions
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packages/web/server/lib/opencode/DOCUMENTATION.md
+4 -1
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@@ -34,6 +34,8 @@ This module provides OpenCode server integration utilities for the web server ru
- `packages/web/server/lib/opencode/startup-performance.js`: opt-in startup phase diagnostics with fixed labels and numeric metadata allowlists.
- `packages/web/server/lib/agent-tool/runtime.js`: managed OpenCode custom-tool materialization, environment injection, loopback authentication, and fixed CLI action dispatch.
- `packages/web/server/lib/system-prompt/runtime.js`: opt-in managed OpenCode system-prompt optimizer materialization and plugin injection.
- `packages/web/server/lib/mcp-reconnect/runtime.js`: always-on managed OpenCode plugin that reconnects MCP servers OpenCode marked `failed`, with per-server backoff.
- `packages/web/server/lib/opencode/managed-plugin-config.js`: the one `OPENCODE_CONFIG_CONTENT` merge every managed plugin (agent tools, system prompt optimizer, MCP reconnect) appends itself through.
- `packages/web/server/lib/opencode/server-utils-runtime.js`: shared server runtime utilities for OpenCode proxy wiring, OpenCode port/readiness helpers, and snapshot fetchers.
- `packages/web/server/lib/opencode/openchamber-routes.js`: OpenChamber update and models metadata route registration.
- `packages/web/server/lib/opencode/pwa-manifest-routes.js`: PWA manifest route registration with recent-session shortcut resolution and short-lived caching.
@@ -130,7 +132,8 @@ The runtime maintains active-session count incrementally from idempotent activit
- `killProcessOnPort(port)`
Managed OpenCode launch also merges the environment returned by the agent-tool
runtime. PATH and `OPENCODE_SERVER_PASSWORD` remain lifecycle-owned and cannot
runtime, the opt-in system prompt optimizer, and the always-on MCP reconnect
plugin, each appending its `file://` entry to the previous one's config. PATH and `OPENCODE_SERVER_PASSWORD` remain lifecycle-owned and cannot
be replaced by injected values. External OpenCode processes receive no
OpenChamber tool injection. Managed launch env strips AppImage `ARGV0` before
spawn so zsh-backed OpenCode tools do not rewrite child argv[0] to the AppImage