docs(fleet): record per-agent model switch in north star (#667)
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This commit was merged in pull request #667.
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2026-06-24 18:14:37 +00:00
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@@ -353,6 +353,25 @@ re-evaluate if isolation or write-volume demands it.
- **Docs as projections:** `docs/TASKS.md` and `MISSION-MANIFEST.md` become generated exports of the DB, not hand-maintained. - **Docs as projections:** `docs/TASKS.md` and `MISSION-MANIFEST.md` become generated exports of the DB, not hand-maintained.
- **Sub-decision pending:** dedicated schema in existing PG instance (recommended) vs. dedicated PG instance. Revisit if isolation or write-volume demands it. - **Sub-decision pending:** dedicated schema in existing PG instance (recommended) vs. dedicated PG instance. Revisit if isolation or write-volume demands it.
## Decisions of record (2026-06-24, with Jason)
- **Per-agent model switch (operator-configurable, NOT a global lock):** model selection is
**per-agent**, never a host-global pin. Claude sessions MUST NOT be locked to a single model in
`~/.claude/settings.json`; each agent chooses its model independently. The plumbing already exists —
roster `model_hint``MOSAIC_AGENT_MODEL``start-agent-session.sh` appends `--model <hint>` to that
agent's harness (claude or pi); settable today via `mosaic fleet add|edit <agent> --model <hint>`.
**North-star target:** surface this as a **per-agent model switch in the webUI** (with CLI/TUI parity
per MVP-X1) — read the roster, expose a per-agent model dropdown, write `model_hint` back, and restart
that one agent to apply. Unset = inherit the harness default. This **composes with** the budget
downgrade ladder (opus → sonnet → haiku, then Claude → Codex): the operator sets the per-agent model
_intent/ceiling_; budget pacing may downgrade within policy. Tracked as a Fleet `TASKS.md` entry under
the Phase-5 webUI surface.
- **Orchestrator runtime (confirmed live):** the **orchestrator and enhancer run Claude Opus 4.8 in the
Claude Code harness**; only workers (coder/reviewer) run pi/gpt-5.5. Consistent with the 2026-06-20
"Claude reserved for Claude Code only" decision (the orchestrator runs _in_ Claude Code, not an
alternate Claude harness). Pi/gpt-5.5 as the orchestrator is permitted **only if proven** at least as
satisfactory; absent that proof, the orchestrator stays on Claude Opus 4.8.
## Future enhancements (north-star, post-MVP — not on the MVP track) ## Future enhancements (north-star, post-MVP — not on the MVP track)
- **Mosaic Claude Discord Plugin** — a first-party Mosaic Discord connector that properly - **Mosaic Claude Discord Plugin** — a first-party Mosaic Discord connector that properly