fix(codex): shrink the SessionStart gateway banner to one line - #8
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johnnyfish wants to merge 1 commit into
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fix(codex): shrink the SessionStart gateway banner to one line#8johnnyfish wants to merge 1 commit into
johnnyfish wants to merge 1 commit into
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Codex renders hook output verbatim in the thread and has no silent model-only channel (unlike Claude's additionalContext / systemMessage split), so the SessionStart gateway message is unavoidably user-visible. It was a 4-line briefing printed on every session start — intrusive. Collapse it to a single terse line that still does its two jobs: signal the gateway is active and cue the onecli-gateway skill (which the skill's own description says loads on this prompt). The detailed rules (no auth headers, curl-not-MCP, connect_url/blocked_by_policy/rate_limited error shapes) already live in that skill, so restating them in the transcript was pure duplication. Verified: npm run build + typecheck + full test suite green; the built hook now emits one line.
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What
The Codex SessionStart hook printed a 4-line OneCLI gateway briefing into the thread on every session start:
Intrusive: it's model-facing instruction leaking into the human's view, every session.
Why it can't just be hidden
Claude's SessionStart hook has two channels —
systemMessage(user-visible one-liner) andhookSpecificOutput.additionalContext(model-only, invisible). Codex has no silent channel: it renders all hook output in the transcript, includingadditionalContext(confirmed — even our structured-envelope UserPromptSubmit hook shows as "hook context" in Codex). So the message is unavoidably user-visible.Change
Collapse the banner to one terse line that still does its two real jobs:
onecli-gatewayskill — whose own description says it loads on this prompt.The detailed rules (no auth headers, curl-not-MCP,
connect_url/blocked_by_policy/rate_limitederror shapes) already live in that skill, so printing them in the transcript was pure duplication. New line:Verification
npm run build(regeneratedplugins/codex/hooks/session-start.mjs),npm run typecheck,npm run test— all green (12 workflow groups incl.codex_setup_status_cleanup,gateway_workflow_guidance).Companion
Pairs with onecli-cli #110, which removed the other (UserPromptSubmit) gateway block from Codex. Together they take Codex from two multi-line blocks per prompt down to one line per session.
Review
Fast path (one-line runtime-string change + rebuild). Self-reviewed for: behavior preservation (skill still cued; PreToolUse auto-source path untouched), scope (only
printActiveMessage; setup/error messages unchanged), and build integrity (regenerated the committed.mjsartifact, not hand-edited). Full suite + typecheck green.