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Post-review refinements to the DRAFT PRD set (decisions D1–D12 unchanged): - R1: PRD-permission-relay is now self-contained — its cited design source (guard-rails-capability-permissions.md) is absent from origin/main, so the essential model (prepare-freely/execute-with-approval, permission levels, resource:action grants) is folded in as the authoritative spec. - R2: Phase-1 conversation channel is tmux/CLI via the f4 Phase-1 tmux connector (operator issues /remote-control); Matrix room (J5/K1) is Phase 2. - R3: Jarvis is a Level-0 orchestrator (delegation + subagents, never executes coding/infra); AC-NS-8 latency isolation is a separate-model-capacity guarantee, not just a separate process (NS-10, AC-NS-8, ASM-5). - R4: jarvis-brain reframed as the P0 (prototype) Mosaic Stack; tenant-1 migration targets the proper stack storage layer (vector DB + enhanced memory + flat-file backends). Agent memory/runbooks migrate live into the memory subsystem and are NOT frozen; repo retires read-only only after both PA data and agent memory are verified migrated (X2/X-R7). - R5: homelab→USC promotion is an explicit owner sign-off gate, not an automated metric (X deployment-scope). - R6: verified K1 is covered by f4-matrix-connector.md Phase 2 (no new doc). - R7: clarified always-available Opus ≠ standing cost (idle = no bill) (J-R2). - Also normalized PRD-backlog-providers.md and PRD-webui-fleet-control.md with prettier (whitespace-only) — they were non-conformant as originally pushed and would have re-broken repo-wide format:check on merge. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01RMoEx7hfdFGjUiCHuN1RRi
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PRD — HMI Main Agent ("Jarvis") · Workstream J
Status: DRAFT for ratification · Source of truth once landed: NORTH_STAR.yaml goals J1–J5 Depends on upstream: H2 (system-type profiles), A3a (card lifecycle), B1 (supervisor tick), F4/K1 (Matrix connector)
Mission
Every Mosaic system gets exactly one always-on human-machine-interface agent — default alias Jarvis, unit mosaic-agent@main.service — that owns the human relationship: conversation, idea development, schedule, email, tasks, knowledge. It delegates all engineering/research/ops work to the orchestrator (Mos, mosaic-agent@orchestrator.service) through the Mosaic Backlog, and reports fleet status to the user without ever interrupting the orchestrator.
Jarvis is a Level-0 orchestrator: it accomplishes its own work through delegation and subagents, never by executing coding/infra tasks itself. PA mutations (tasks/events/knowledge) are direct API calls; everything heavier is either a spawned subagent (research, drafting, analysis) or a backlog card handed to Mos (engineering/infra/fleet). This keeps the main agent's context conversational and light.
This solves the observed failure mode: a busy orchestrator that can't respond, accumulates conversational context rot, and derails over time. Post-split, the orchestrator's context is execution-only.
Because Jarvis and Mos are separate agents with separate model capacity (D11: Jarvis on Opus, Mos on Fable; independent inference quota), orchestrator load cannot degrade conversational latency — the isolation in AC-NS-8 is a capacity guarantee, not merely a separate process.
Requirements
Persona & runtime (J1)
| ID | Requirement |
|---|---|
| J-R1 | Jarvis is provisioned from the personal-assistant persona baseline via system-type profiles (H2/H3); alias, model tier, host, and channel are profile fields, not code. |
| J-R2 | Default model tier Opus (ratified D11); the orchestrator's tier is independent. Always-available ≠ always-billed: Opus is provisioned 24/7 but cost is per-interaction — an idle Jarvis (no user turn in flight) incurs no model spend, so "always-on" carries no standing token bill. |
| J-R3 | Jarvis survives reboot under systemd (mosaic-agent@main), participates in the fleet heartbeat protocol, and is counted in the supervisor's health floor. |
| J-R4 | Persona customization is update-surviving per H4 (override layer wins on merge). |
PA toolchain (J2)
| ID | Requirement |
|---|---|
| J-R5 | Jarvis executes personal-assistant mutations directly in the user's workspace via the product API: tasks, events/calendar, knowledge entries, ideas, tickets. No delegation for PA ops (ratified D4). |
| J-R6 | External PA integrations (email, external calendars, helpdesk) are workspace-scoped integrations with credentials in the product credential vault; actions flagged requires_approval route through the permission relay (workstream P). |
| J-R7 | Until tenant-1 migration (X2) completes, Jarvis may read/write the jarvis-brain flat files as a transitional adapter; the adapter is deleted at X2 cutover. |
Delegation contract (J3)
| ID | Requirement |
|---|---|
| J-R8 | The Jarvis→Mos handoff is only via Mosaic Backlog cards: goal, acceptance criteria, priority, depends_on, advisory budget. Never via chat messages to the orchestrator. |
| J-R9 | Jarvis translates conversation outcomes into card sets; ambiguity is resolved with the user before card creation — the orchestrator receives only decision-complete work. |
| J-R10 | Card authorship is attributed (author=main-agent, ratified-by=user where applicable) for audit. |
| J-R11 | Authority line: Mos holds all execution and merge authority (NS-4). Jarvis relays the user's GO/NO-GO gates as card state, and never acquires fleet mutation, merge, or dispatch rights. |
Passive observability (J4)
| ID | Requirement |
|---|---|
| J-R12 | Jarvis answers "what's the fleet doing" from read-only sources: heartbeat files, mosaic fleet ps JSON, backlog card states, CI status. Zero messages to the orchestrator for status. |
| J-R13 | Jarvis proactively surfaces to the user: blocked cards, failed CI on user-ratified missions, approval requests pending, budget advisories. (PDA-friendly phrasing per SOUL.md.) |
Channel (J5)
| ID | Requirement |
|---|---|
| J-R14 | Phase 2 (target channel): Jarvis's conversation lives in a dedicated Matrix room on the self-hosted homeserver via OrchestratorConnector(matrix) (K1 = f4 Phase 2). Matrix-first: no Discord channel is created for Jarvis (ratified D1). |
| J-R14a | Phase 1 (interim channel, ratified): Jarvis runs on the tmux/CLI connector — the f4 Phase-1 default connector. The operator launches the mosaic-agent@main tmux session and issues /remote-control to grant interactive access; this is the day-one conversation surface. No Discord, no Matrix dependency in Phase 1 (keeps D1 intact and unblocks J1–J4 before K1 lands). |
| J-R15 | Multi-platform user reach arrives via mautrix bridges (K2); Jarvis's code path is Matrix-only (from Phase 2 onward). |
Acceptance criteria
- AC-NS-8: user converses with Jarvis under full orchestrator load; latency unaffected; orchestrator receives zero conversational traffic.
- AC-NS-9: a conversationally-agreed mission round-trips (cards → drained → completed → reported by Jarvis) with no chat handoff.
- Kill the orchestrator mid-conversation: Jarvis conversation is unaffected; Jarvis reports the outage from heartbeat state. (Directly exercises the separate-capacity guarantee.)
!sys-equivalent admin verbs work in Jarvis's active channel — the tmux/CLI session in Phase 1, the Matrix room in Phase 2 (status/logs/clear/restart of the main agent).- Phase-1 channel: operator launches the
mosaic-agent@maintmux session, issues/remote-control, and holds a full conversation with Jarvis over CLI with no Matrix/Discord dependency.
Non-goals
- Jarvis executing code/infra changes (that is Mos + fleet).
- Horizontal sharding of the main agent (rejected in the Matrix charter: split-brain).
- Per-workspace fleets (post-MVP per ASM-6).
Open items (for Mos's planner)
- Context hygiene: Jarvis's durable memory is the workspace (tasks/knowledge/ideas); define its resume protocol (KICKSTART-equivalent) so
/clearis cheap. ASSUMPTION: mirror the MOS-KICKSTART two-file pattern until the product grows a native session-resume feature. - Reconcile the old
apps/apimatrix-bot-sdk workspace bridge with the F4 connector design (one Matrix stack, not two). NOTE (verified 2026-07-09): no matrix dependency remains inapps/apionorigin/main— this item is likely already moot; confirm before K1 build.