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fix(codex): set platform env for plugin MCP server #722

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Merged
mksglu merged 1 commit into from
May 26, 2026
Merged

fix(codex): set platform env for plugin MCP server #722

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3 changes: 3 additions & 0 deletions .codex-plugin/mcp.json
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Expand Up @@ -4,6 +4,9 @@
"command": "node",
"args": ["./start.mjs"],
"cwd": ".",
"env": {
"CONTEXT_MODE_PLATFORM": "codex"
},
"default_tools_approval_mode": "approve"
}
}
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3 changes: 3 additions & 0 deletions README.md
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Expand Up @@ -586,6 +586,9 @@ The Codex plugin manifest provides MCP via `.codex-plugin/mcp.json`, skills via

[mcp_servers.context-mode]
command = "context-mode"

[mcp_servers.context-mode.env]
CONTEXT_MODE_PLATFORM = "codex"
```

3. Create `$CODEX_HOME/hooks.json` (or `~/.codex/hooks.json` when `CODEX_HOME` is unset):
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9 changes: 9 additions & 0 deletions tests/plugins/codex-manifest.test.ts
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Expand Up @@ -66,6 +66,15 @@ describe(".codex-plugin/mcp.json", () => {
expect(entry.cwd).toBe(".");
});

it("sets CONTEXT_MODE_PLATFORM=codex for the MCP server process", () => {
// Codex hook wrappers already set this before loading shared hook code.
// The MCP server needs the same signal so storage and doctor output do
// not fall back to ~/.claude on machines that have both agents installed.
const servers = mcp.mcpServers as Record<string, { env?: Record<string, string> }>;
const entry = servers["context-mode"];
expect(entry.env?.CONTEXT_MODE_PLATFORM).toBe("codex");
});

it("does NOT use `${CODEX_PLUGIN_ROOT}` placeholders (no var expansion happens)", () => {
const raw = readFileSync(resolve(REPO_ROOT, ".codex-plugin/mcp.json"), "utf8");
expect(raw).not.toMatch(/\$\{[^}]*PLUGIN_ROOT[^}]*\}/);
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