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Dragan Spiridonov
f2a350ba7f
Anthropic announced nested subagent support (depth=5) on 2026-06-09; the runtime currently strips Task at parent->child spawn (upstream denylist, empirically confirmed by our committed probe: level=1 status=NO_AGENT_TOOL, matching ruflo ADR-147). This lands the readiness infrastructure that is independently useful today and activates with zero changes when the gate lifts: - aqe hooks post-task gains --parent-agent-id / --depth (validated: identifier charset, integer 0 <= d <= 32; depth=0 survives as 0); provenance persisted to qe_trajectories.metadata_json (stage 1 — no schema migration) and forwarded into ReasoningBank feedback so learning can segment patterns per hierarchy level - TaskExecution gains optional parentAgentId/depth (additive types) - scripts/probe-nested-spawn-depth.mjs: single-shot empirical probe, committed transcript under docs/probes/ — re-run after every `claude update`; TASK_TOOL_LIVE is the signal for follow-up phases - fresh-project fix found by the E2E: persistTaskOutcome assumed captured_experiences/experience_applications exist, but they are middleware-created — Stream B silently no-oped on fresh installs; canonical DDL now ensured in the hook path Deliberately deferred (documented in ADR-101 P1): tools: frontmatter retrofit on shipped qe-*.md agents — Claude Code frontmatter is a restrictive allowlist and would sever inherited MCP tool access; needs maintainer sign-off + wildcard verification first. 8 unit tests green; E2E on a fresh temp project verified persistence, rejections, and depth=0 boundary. tsc + eslint clean. Part of #520 (improvement 4/7, Tier 2). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>