docs(plan): fold the mediation-plane spike verdict into §4.1 - #506
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The 2026-07-31 gateway spike: both agentgateway and ContextForge have a real per-tool-call external decision hook + a structured reject, but NEITHER can hold a call open for a minutes-long human approval (synchronous callouts on a bounded timeout). So §4.1 now records: - suspend-for-a-human is a deny-with-"pending" → idempotency-keyed retry protocol, not a blocking wait (sub-timeout approvals still resolve as a synchronous hold); - IBM ContextForge is the FIRST adapter (tool_pre_invoke ≈ our gate-hook shape, async, configurable timeout); agentgateway second (cleaner ExtMcp proto, Rust, ~10s deadline); - the EffectIntent → Decision contract gains a first-class `pending` outcome (allow / ask / deny / pending); - two unknowns for a hands-on test: agentgateway backend-timeout override on the guardrails channel, and the agent's client-side MCP request timeout. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Records the 2026-07-31 gateway spike outcome in
docs/agent-os-plan.md§4.1 (the mediation-plane wedge).Finding: both agentgateway and IBM ContextForge expose a real per-tool-call external decision hook + a structured reject, but neither can hold a call open for a minutes-long human approval — both are synchronous callouts on a bounded timeout. The bet is still viable; the primitive just has to be a protocol.
What changed in §4.1:
tool_pre_invokereturn shape ≈ our existing PreToolUse gate-hook; async; configurable timeout; out-of-process plugin). agentgateway second (cleanerExtMcpproto, but Rust + ~10s deadline).EffectIntent → Decisioncontract gains a first-classpendingoutcome (allow / ask / deny / pending).Docs-only; no code or version change.
🤖 Generated with Claude Code