tractor/ai/prompt-io/claude/20260413T192116Z_f851f28_pr...

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---
model: claude-opus-4-6
service: claude
session: (ad-hoc, not tracked via conf.toml)
timestamp: 2026-04-13T19:21:16Z
git_ref: f851f28
scope: code
substantive: true
---
## Prompt
User provided a detailed implementation plan for
a new `test_tpt_bind_addrs.py` test suite covering
`open_root_actor(tpt_bind_addrs=...)` — the three
runtime code paths in `_root.py:385-450`:
1. Non-registrar, no explicit bind -> random addrs
2. Registrar, no explicit bind -> registry_addrs
3. Explicit bind given -> `wrap_address()` + merge
Plan specified 6 test functions (~10 parametrized
variants), predicted a type-mixing bug at line 446,
and asked for an in-flight fix if confirmed.
## Response summary
Created `tests/discovery/test_tpt_bind_addrs.py`
with 9 collected test variants across 6 functions:
- `test_registrar_root_tpt_bind_addrs` (3 variants:
`bind-eq-reg`, `bind-subset-reg`,
`bind-disjoint-reg`)
- `test_non_registrar_root_tpt_bind_addrs`
(2 variants: `bind-same-bindspace`,
`bind-disjoint`)
- `test_non_registrar_default_random_bind`
(baseline, no explicit bind)
- `test_tpt_bind_addrs_as_maddr_str`
(multiaddr string input)
- `test_registrar_merge_binds_union`
(registrar + disjoint bind -> union)
- `test_open_nursery_forwards_tpt_bind_addrs`
(`open_nursery(**kwargs)` forwarding)
Confirmed and fixed the predicted bug at
`_root.py:446`: the registrar merge path mixed
`Address` objects (`tpt_bind_addrs`) with raw tuples
(`uw_reg_addrs`) inside `set()`, preventing
deduplication and causing double-bind `OSError`.
Fix: wrap `uw_reg_addrs` before the set union:
```python
# before (broken)
tpt_bind_addrs = list(set(
tpt_bind_addrs + uw_reg_addrs
))
# after (fixed)
tpt_bind_addrs = list(set(
tpt_bind_addrs
+ [wrap_address(a) for a in uw_reg_addrs]
))
```
All 9 tests pass after the fix.
## Files changed
- `tests/discovery/test_tpt_bind_addrs.py` (new)
- `tractor/_root.py:446` (bug fix, 1 line)
## Human edits
N/A — pending review.