Evidence record / codex
A dated record of one change, kept so the writing that cites it can be checked. Compiled from the sources listed below by the research run, not written for reading. The judgment lives in the signals and issues that cite it, below.
2026-07-01-codex-codex-0-142-2-stable-ships-mcp-tools-now-use-tool-search
Codex 0.142.2 stable ships: MCP tools now use tool search by default when supported (channel: tagged-release, 2026-06-25). Operator consequence: Runtime behavior change for anyone wiring MCP servers into Codex: tool discovery now defaults to tool-search rather than dumping the full tool list. Re-verify that your MCP-backed workflows still resolve the tools you expect against your model/provider; older models retain compatibility but discovery path differs. Upgrade to 0.142.2+ to get it. Full receipted detail lives in harvest/watchlist.md.
Receipt
Finding metadata
Run: 2026-07-01-weekly-digest-2026-06-24_2026-07-01-frontier-v0
Finding ID: 2026-07-01-codex-codex-0-142-2-stable-ships-mcp-tools-now-use-tool-search
Source links
Primary links, including exact changelog lines when available.
Versioned source: run artifact