---
model: claude-fable-5[1m]
service: claude
session: 32d15f9a-b2d3-4c26-bdc9-190219141a25
timestamp: 2026-06-10T17:13:44Z
git_ref: datad_service
diff_cmd: git log -1 -p --follow -- ai/prompt-io/claude/20260610T171344Z_eee19de0_prompt_io.md
scope: code
substantive: true
raw_file: 20260610T171344Z_eee19de0_prompt_io.raw.md
---

## Prompt

Same session-initiating `brokerd`-split instruction (see
`20260610T170859Z_75cefe10_prompt_io.md`); this is the
approved plan's final "stage 4": caps-sec slimming of
the (live, credentialed) trading actor + the `ib`
dual-daemon `client_id` collision mitigation flagged in
the plan's risk register.

## Response summary

`brokerd` loses ALL `piker.data.*` (feed) RPC mods;
spawn fails fast for datad-only backends with a "use
paper-mode" error; `ib`'s default api-gw `client_id`
gets a per-daemon-kind offset so `datad.ib` +
`brokerd.ib` don't collide on connect.

## Files changed

- `piker/brokers/_daemon.py` — `_data_mods` -> minimal
  `_brokerd_service_mods`; `broker_init()` reads
  `_brokerd_mods` (fallback `__enable_modules__`);
  `spawn_brokerd()` fail-fast via `validate.get_eps()`
- `piker/brokers/ib/api.py` — role-based `client_id`
  offset in `load_aio_clients()`
- `piker/cli/__init__.py` — resolved "expose datad"
  TODO

## Human edits

None — committed as generated.