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v1.15.0-mcp-multi: multi-server MCP client + stdio transport + config file + tool globs

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Generalizes the v1.14.1 single-server Context7 PoC into a multi-server MCP
client registry with per-server graceful degradation. JSON config at
/data/mcp.json (bind-mounted alongside AGENTS.md) matches opencode's
mcpServers schema shape. Config file missing = no MCP (opt-in by presence).

Two transports: Streamable HTTP (remote servers like Context7) and stdio
(local subprocess servers like codecontext). Stdio spawns a persistent child
via the SDK's StdioClientTransport; shutdown hook closes all transports.

Tool prefix generalized from context7_<name> to <serverName>_<toolName> with
a toolToServer reverse map for dispatch routing. AGENTS.md tools: field now
supports glob patterns (context7_*, !web_*) via matchToolGlob — last-match-
wins with ! deny prefix. Replaces exact-match .includes() in stream-phase.ts.

refreshToolNames() in agents.ts rebuilds the DEFAULT_TOOLS snapshot after
appendMcpTools so agents without explicit tools: lists see MCP tools —
reviewer caught that the module-load-time snapshot would permanently exclude
late-registered tools.

Read-only invariant: readOnlyHint === false rejected at discovery. Result
size capped at 5MB. v1.14.1 env vars removed — superseded by config file.
Default data/mcp.json ships with Context7 disabled.

363/363 server tests passing. No schema changes, no frontend changes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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indifferentketchup
2026-05-24 04:08:42 +00:00
parent 5692e99a5d
commit d27a977d59
14 changed files with 741 additions and 121 deletions
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All notable changes per release tag. Most recent on top, ordered by tag creation date (which matches the git history). Tag names follow `vMAJOR.MINOR.PATCH-slug` — the slug describes what shipped, so the tag name alone is enough to recall the batch.
## v1.15.0-mcp-multi — 2026-05-24
Multi-server MCP client with stdio + Streamable HTTP transports, JSON config file, and per-agent tool glob patterns. Generalizes the v1.14.1 single-server Context7 PoC into a registry of named MCP servers with per-server graceful degradation. JSON config at `/data/mcp.json` (bind-mounted alongside `AGENTS.md`) matches opencode's `mcpServers` schema shape so server entries are copy-pasteable. Config file missing = no MCP (opt-in by file presence). Stdio transport spawns a persistent subprocess via the SDK's `StdioClientTransport` with NDJSON framing; Streamable HTTP reuses the v1.14.1 pattern via `StreamableHTTPClientTransport`. Tool prefix generalized from `context7_<name>` to `<serverName>_<toolName>` with a reverse `toolToServer` map for dispatch routing. Per-agent AGENTS.md `tools:` field now supports glob patterns (`context7_*`, `!web_*`) via `matchToolGlob` (last-match-wins, `!` prefix denies); replaces the exact-match `.includes()` in `stream-phase.ts`. Glob patterns bypass `ALL_TOOL_NAMES` validation in the parser since MCP tool names aren't known at parse time. `refreshToolNames()` in `agents.ts` rebuilds the `DEFAULT_TOOLS` snapshot after `appendMcpTools` so agents without explicit `tools:` lists see MCP tools — reviewer caught that the module-load-time snapshot would permanently exclude late-registered tools. Read-only invariant preserved: all MCP tools with `readOnlyHint: false` rejected at discovery. Result size capped at 5MB. Shutdown hook closes all transports. v1.14.1 env vars (`MCP_CONTEXT7_URL`, `MCP_CONTEXT7_API_KEY`) removed — superseded by the config file. Default `data/mcp.json` ships with Context7 disabled; flip `"enabled": true` to activate. 363/363 server tests passing (27 new: multi-server wrapping, glob matching, routing, degradation). No schema changes, no frontend changes.
## v1.14.1-mcp-poc — 2026-05-23
Single-server MCP client PoC against Context7. New `apps/server/src/services/mcp-client.ts` (~200 lines) wraps `@modelcontextprotocol/sdk` v1.29.0 with Streamable HTTP transport. On startup (when `MCP_CONTEXT7_URL` is set), connects to Context7, discovers tools via `tools/list`, wraps each as a `ToolDef` prefixed `context7_<name>`, and appends to `ALL_TOOLS` (alpha-sorted for prompt-cache stability). `appendMcpTools()` in `tools.ts` handles the late-registration; `ALL_TOOLS` changed from `ReadonlyArray` to mutable to support it. Read-only invariant guard rejects any MCP tool with `readOnlyHint: false` (MCP SDK v1.29.0 uses `readOnlyHint`, not `readOnly`). Tool dispatch is transparent — `executeToolCall` routes MCP tool calls through the `ToolDef.execute` wrapper, which strips the `context7_` prefix before calling the MCP server. Graceful degradation: MCP server down at startup → zero tools, warn log; MCP server down mid-session → error-shaped result, model self-corrects. Result size capped at 5MB with truncation (matches native `view_file`'s `MAX_FILE_BYTES`). Adversarial review caught that the Zod `.default('https://...')` on the URL config made MCP effectively always-on instead of opt-in — fixed by removing the default. 348/348 server tests passing (16 new mcp-client tests covering tool wrapping, read-only guard, name prefixing, content extraction). No schema changes, no frontend changes. Proves the MCP tool-discovery → tool-call → result-render loop end-to-end before the full v1.15 port.