---
model: claude-fable-5[1m]
service: claude
session: 32d15f9a-b2d3-4c26-bdc9-190219141a25
timestamp: 2026-06-10T17:08:59Z
git_ref: datad_service
diff_cmd: git log -1 -p --follow -- ai/prompt-io/claude/20260610T170859Z_75cefe10_prompt_io.md
scope: code
substantive: true
raw_file: 20260610T170859Z_75cefe10_prompt_io.raw.md
---

## Prompt

Session-initiating instruction (driving all 7 commits in
this series):

> ok i want you to become the distributed runtime and
> concurrency expert for this project - namely acquire
> a deep understanding of tractor and how it's used.
> then i want you to attempt to factor our current
> brokerd service daemon into 2 daemons: a brokerd
> which only hosts live/paper trading endpoint tasks
> [..] a new `datad` subdaemon which in a separate
> subactor serves all the data feed service tasks [..]
> give me a mega detailed plan on how to approach this,
> and a staged approach for the implementation.

Proximate driver for THIS commit: during the approved
plan's stage-0 test gate the agent discovered test
subactors were writing into the user's REAL
`~/.config/piker/accounting/` files (a bogus paper fill
landed in `account.kraken.paper.toml`) because the old
test-dir override in `config.get_app_dir()` was
commented out and could never work in spawned
subactors anyway. Fix applied autonomously under the
approved plan; no explicit per-fix user prompt.

## Response summary

Restore `pytest` config-dir isolation by resolving the
per-test tmp dir lazily (at conf-path access time) from
`tractor` runtime-vars, which propagate down the actor
tree; route all conf-path derivation through
`config.get_conf_dir()` so the override is effective in
every (sub)actor.

## Files changed

- `piker/config.py` — add `_maybe_use_test_dir()`;
  hook in `get_conf_dir()`; route `get_conf_path()` +
  `load()` mkdir through it
- `piker/accounting/_ledger.py` — derive ledger dir
  via `config.get_conf_dir()` (not the global)
- `piker/accounting/_pos.py` — same for account files

## Human edits

None — committed as generated.