Manifest 6.23.0 adds Codex as a routable agent platform and fixes two things that broke it against non-OpenAI providers

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mnfst/[redacted] (published 2026-09-07T09:59Z) puts OpenAI Codex in the agent picker with a copy-ready `~/.codex/config.toml` panel pointing Codex CLI and Desktop at Manifest over the Responses API (`wire_api = "responses"`) with an `mnfst_` key. Two compatibility fixes make that actually work against non-OpenAI upstreams: Responses-API `role: "developer"` instruction messages are folded into `system`, and OpenAI-hosted tools like `web_search` and `file_search` are dropped on the Chat Completions path, while native Responses upstreams keep both untouched. Streamed and namespaced client tool calls, including parallel calls and tool-result replay, are now preserved through non-OpenAI providers.