Managed Agents ceiling program: findings, experiments, and provisioner extensions

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Summary

Managed Agents ceiling program: all ten workstreams' findings, experiments, provisioner extensions — and the final report.

• context/findings/REPORT.md (replaces the earlier ONE-PAGER.md): the comprehensive capability-ceiling report — what Managed Agents are, architecture (loop vs self-hosted sandbox, three durability planes), a per-primitive can-build table with the measured numbers, the class-D register (self-healing, event ingress, fork/checkpoint, knowledge retrieval, model routing, fleet ops), the lifecycle-moat analysis, custom-build audit (clean — no class-D replacements built), the untested register, and the conclusion.
• context/findings/{A..K}*.md + experiments/{A..K}/: per-workstream evidence (session/event/request IDs, harnesses, raw JSON).
• context/findings/SYNTHESIS.md: parity table, provenance ledger, class-D register.
• packages/provision/: class-B provisioner extensions only — drift.ts (client-side desired-vs-live comparison splitting real drift from server-added fields), subagent/Skill ID plumbing, discovery prompt paragraphs.

Core finding: the loop is self-diagnosing, not self-healing — dead-worker detection is native (~360 s lease expiry) and narrow transient errors retry, but nothing re-dispatches abandoned work (work_id == session_id), billing-exhausted sessions stay inert, and there is no event ingress, fork/checkpoint, knowledge injection, or model routing. Execution is near Devin parity; the lifecycle/control plane is the ceiling.

Verification: pnpm verify (25 tests), ruff format/check, mypy, pytest (32 tests) all green.

Link to Devin session: https://app.devin.ai/sessions/f50c9cdc5d874afdae743036b0e39862
Open in Devin Desktop: https://app.devin.ai/desktop/session/f50c9cdc5d874afdae743036b0e39862?variant=devin
Requested by: @hrabbani

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