Finding / codex
2026-09-21-codex-hooks-mcp-and-extensions-new-interception-points
Hooks, MCP, and extensions: new interception points. 0.150.0 adds Interrupt hooks, which run commands or MCP handlers when a top-level turn is interrupted. 0.151.0 lets extensions inspect or replace MCP tool results before the model sees them. 0.152.0 adds per-tool output_token_limit. 0.153.0 scopes remembered MCP tool approvals to the selected app account. 0.154.0 hot-reloads plugin tools, skills, and hooks in existing sessions after plugin upgrades. MCP OAuth refresh failures surface a login challenge “without automatically replaying rejected tool calls”. 0.155.0 adds Touch ID verification for MCP requests in local TUI on supported Macs.
Channel: tagged-release. Half: capability. Date: 2026-08-26..2026-09-17.
Operator consequence: You can now filter or redact MCP output at the harness layer instead of in each server. Because plugins hot-reload, a session’s skills and hooks can change mid-run. Re-audit anything that assumed the skill and hook set was fixed at session start.
Receipt
Finding metadata
Run: 2026-09-21-weekly-digest-2026-08-20_2026-09-21-frontier-v0
Finding ID: 2026-09-21-codex-hooks-mcp-and-extensions-new-interception-points
Profile citations
- Codex / claim / mcp-result-interception-hot-reload
Source links
Primary links, including exact changelog lines when available.