Land the scaffolding for a future sub-interpreter (PEP 734
`concurrent.interpreters`) actor spawn backend per issue #379. The
spawn flow itself is not yet implemented; `subint_proc()` raises a
placeholder `NotImplementedError` pointing at the tracking issue —
this commit only wires up the registry, the py-version gate, and
the harness.
Deats,
- bump `pyproject.toml` `requires-python` to `>=3.12, <3.15` and
list the `3.14` classifier — the new stdlib
`concurrent.interpreters` module only ships on 3.14
- extend `SpawnMethodKey = Literal[..., 'subint']`
- `try_set_start_method('subint')` grows a new `match` arm that
feature-detects the stdlib module and raises `RuntimeError` with
a clear banner on py<3.14
- `_methods` registers the new `subint_proc()` via the same
bottom-of-module late-import pattern used for `._trio` / `._mp`
Also,
- new `tractor/spawn/_subint.py` — top-level `try: from concurrent
import interpreters` guards `_has_subints: bool`; `subint_proc()`
signature mirrors `trio_proc`/`mp_proc` so the Phase B.2 impl can
drop in without touching the registry
- re-add `import sys` to `_spawn.py` (needed for the py-version msg
in the gate-error)
- `_testing.pytest.pytest_configure` wraps `try_set_start_method()`
in a `pytest.UsageError` handler so `--spawn-backend=subint` on
py<3.14 prints a clean banner instead of a traceback
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Rework section 3 from a worktree-only check into a
structured 3-step flow: detect active venv, interpret
results (Case A: active, B: none, C: worktree), then
run import + collection checks.
Deats,
- Case B prompts via `AskUserQuestion` when no venv
is detected, offering `uv sync` or manual activate
- add `uv run` fallback section for envs where venv
activation isn't practical
- new allowed-tools: `uv run python`, `uv run pytest`,
`uv pip show`, `AskUserQuestion`
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
New "Inspect last failures" section reads the pytest
`lastfailed` cache JSON directly — instant, no
collection overhead, and filters to `tests/`-prefixed
entries to avoid stale junk paths.
Also,
- add `jq` tool permission for `.pytest_cache/` files
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Group `.claude/` ignores per-skill instead of a
flat list: `ai.skillz` symlinks, `/open-wkt`,
`/code-review-changes`, `/pr-msg`, `/commit-msg`.
Add missing symlink entries (`yt-url-lookup` ->
`resolve-conflicts`, `inter-skill-review`). Drop
stale `Claude worktrees` section (already covered
by `.claude/wkts/`).
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Drop unused `TYPE_CHECKING` imports (`Channel`,
`_server`), remove commented-out `import os` in
`_entry.py`, and use `get_runtime_vars()` accessor
instead of bare `_runtime_vars` in `_trio.py`.
Also,
- freshen `__init__.py` layout docstring for the
new per-backend submod structure
- update `_spawn.py` + `_trio.py` module docstrings
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Split the monolithic `spawn._spawn` into a slim
"core" + per-backend submodules so a future
`._subint` backend (per issue #379) can drop in
without piling more onto `_spawn.py`.
`._spawn` retains the cross-backend supervisor
machinery: `SpawnMethodKey`, `_methods` registry,
`_spawn_method`/`_ctx` state, `try_set_start_method()`,
the `new_proc()` dispatcher, and the shared helpers
`exhaust_portal()`, `cancel_on_completion()`,
`hard_kill()`, `soft_kill()`, `proc_waiter()`.
Deats,
- mv `trio_proc()` → new `spawn._trio`
- mv `mp_proc()` → new `spawn._mp`, reads `_ctx` and
`_spawn_method` via `from . import _spawn` for
late binding bc both get mutated by
`try_set_start_method()`
- `_methods` wires up the new submods via late
bottom-of-module imports to side-step circular
dep (both backend mods pull shared helpers from
`._spawn`)
- prune now-unused imports from `_spawn.py` — `sys`,
`is_root_process`, `current_actor`,
`is_main_process`, `_mp_main`, `ActorFailure`,
`pretty_struct`, `_pformat`
Also,
- `_testing.pytest.pytest_generate_tests()` now
drives the valid-backend set from
`typing.get_args(SpawnMethodKey)` so adding a
new backend (e.g. `'subint'`) doesn't require
touching the harness
- refresh `spawn/__init__.py` docstring for the
new layout
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Log the `claude-opus-4-7` design session that produced the phased plan
(A: modularize `_spawn`, B: `_subint` backend, C: harness) and concrete
Phase A file-split for #379. Substantive bc the plan directly drives
upcoming impl.
Prompt-IO: ai/prompt-io/claude/20260417T034918Z_9703210_prompt_io.md
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Import and apply `cpu_scaling_factor()` from
`conftest`; bump base from 3.6 -> 4 and multiply
through so CI boxes with slow CPUs don't flake.
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Since we no longer need the example after integrating `multiaddr` into
the `.discovery` subsys.
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Replace verbose inline code dumps in `.raw.md`
entries with terse summaries and `git diff`
cmd references. Add `diff_cmd` metadata to each
entry's YAML frontmatter so readers can reproduce
the actual output diff.
Also,
- rename `multiaddr_declare_eps.md_` -> `.md`
(drop trailing `_` suffix)
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Deats,
- use `proc.poll() is None` in `sig_prog()` to
distinguish "still running" from exit code 0;
drop stale `breakpoint()` from fallback kill
path (would hang CI).
- add missing `raise` on the `RuntimeError` in
`async_main()` when no tpt bind addrs given.
- clean up stale uid entries from the registrar
`_registry` when addr eviction empties the
addr list.
- update `discovery.__init__` docstring to match
the new eager `._multiaddr` import.
- fix `registar` -> `registrar` typo in teardown
report log msg.
Review: PR #429 (Copilot)
https://github.com/goodboy/tractor/pull/429
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
The prior approach eagerly reused `_parent_chan` when
parent IS the registrar, but that channel may still
carry ctx/stream teardown protocol traffic —
concurrent `unregister_actor` RPC causes protocol
conflicts. Now try a fresh `get_registry()` conn
first; only fall back to the parent channel on
`OSError` (listener already closed/unlinked).
Deats,
- fresh `get_registry()` is the primary path for
all addrs regardless of `parent_is_reg`
- `OSError` handler checks `parent_is_reg` +
`rent_chan.connected()` before fallback
- fallback catches `OSError` and
`trio.ClosedResourceError` separately
- drop unused `reg_addr: Address` annotation
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
A backlog of 1 caused `ECONNREFUSED` when multiple
sub-actors simultaneously connect to deregister from
a remote-daemon registrar. Now matches the TCP
transport's default backlog (~128).
Also,
- add cross-ref comments between
`_uds.close_listener()` and `async_main()`'s
`parent_is_reg` deregistration path explaining
the UDS socket-file lifecycle
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
`get_random()` can produce the same UDS filename for a given
pid+actor-state, so the "disjoint addrs" premise doesn't always hold.
Gate the `len(bound) >= 2` assertion on whether the registry and bind
addrs actually differ via `expect_disjoint`.
Also,
- drop unused `partial` import
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
When the parent actor IS the registrar, reuse the existing parent
channel for `unregister_actor` RPC instead of opening a new connection
via `get_registry()`. This avoids failures when the registrar's listener
socket is already closed during teardown (e.g. UDS transport unlinks the
socket file rapidly).
Deats,
- detect `parent_is_reg` by comparing `_parent_chan.raddr` against
`reg_addrs` and if matched, create a `Portal(rent_chan)` directly
instead of `async with get_registry()`.
- rename `failed` -> `failed_unreg` for clarity.
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Retry signal delivery in `sig_prog()` up to `tries`
times (default 3) w/ `canc_timeout` sleep between
attempts; only fall back to `_KILL_SIGNAL` after all
retries exhaust. Bump default timeout 0.1 -> 0.2.
Also,
- `test_multi_nested_subactors_error_through_nurseries`
gives the first prompt iteration a 5s timeout even
on linux bc the initial crash sequence can be slow
to arrive at a `pdb` prompt
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
New locality-aware addr preference for multihomed
actors: UDS > local TCP > remote TCP. Uses
`ipaddress` + `socket.getaddrinfo()` to detect
whether a `TCPAddress` is on the local host.
Deats,
- `_is_local_addr()` checks loopback or
same-host IPs via interface enumeration
- `prefer_addr()` classifies an addr list into
three tiers and picks the latest entry from
the highest-priority non-empty tier
- `query_actor()` and `wait_for_actor()` now
call `prefer_addr()` instead of grabbing
`addrs[-1]` or a single pre-selected addr
Also,
- `Registrar.find_actor()` returns full
`list[UnwrappedAddress]|None` so callers can
apply transport preference
Prompt-IO: ai/prompt-io/claude/20260414T163300Z_befedc49_prompt_io.md
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Adjust all imports to match.
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Replace `Registrar._registry: bidict[uid, addr]`
with `dict[uid, list[UnwrappedAddress]]` to
support actors binding on multiple transports
simultaneously (multi-homed).
Deats,
- `find_actor_addr()` returns first addr from
the uid's list
- `get_registry()` now returns per-uid addr
lists
- `find_actor_addrs()` uses `.extend()` to
collect all addrs for a given actor name
- `register_actor_addr()` appends to the uid's
list (dedup'd) and evicts stale entries where
a different uid claims the same addr
- `delete_actor_addr()` does a linear scan +
`.remove()` instead of `bidict.inverse.pop()`;
deletes the uid entry entirely when no addrs
remain
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Set `header` to "Contacting existing registry"
for non-registrar actors and "Opening new
registry" for registrars, so the boot log
reflects the actual role.
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Re-export `parse_endpoints`, `parse_maddr`, and
`mk_maddr` in `discovery.__init__` so downstream
(piker) can import directly from the pkg ns.
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Provide a service-table parsing API for downstream projects (like
`piker`) to declare per-actor transport bind addresses as a config map
of actor-name -> multiaddr strings (e.g. from a TOML `[network]`
section).
Deats,
- `EndpointsTable` type alias: input `dict[str, list[str|tuple]]`.
- `ParsedEndpoints` type alias: output `dict[str, list[Address]]`.
- `parse_endpoints()` iterates the table and delegates each entry to the
existing `tractor.discovery._discovery.wrap_address()` helper, which
handles maddr strings, raw `(host, port)` tuples, and pre-wrapped
`Address` objs.
- UDS maddrs use the multiaddr spec name `/unix/...` (not tractor's
internal `/uds/` proto_key)
Also add new tests,
- 7 new pure unit tests (no trio runtime): TCP-only, mixed tpts,
unwrapped tuples, mixed str+tuple, unsupported proto (`/udp/`),
empty table, empty actor list
- all 22 multiaddr tests pass rn.
Prompt-IO:
ai/prompt-io/claude/20260413T205048Z_269d939c_prompt_io.md
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Add 9 test variants (6 fns) covering all three
`tpt_bind_addrs` code paths in `open_root_actor()`:
- registrar w/ explicit bind (eq, subset, disjoint)
- non-registrar w/ explicit bind (same/diff
bindspace) using `daemon` fixture
- non-registrar default random bind (baseline)
- maddr string input parsing
- registrar merge produces union
- `open_nursery()` forwards `tpt_bind_addrs`
Fix type-mixing bug at `_root.py:446` where the
registrar merge path did `set(Address + tuple)`,
preventing dedup and causing double-bind `OSError`.
Wrap `uw_reg_addrs` before the set union so both
sides are `Address` objs.
Also,
- add prompt-io output log for this session
- stage original prompt input for tracking
Prompt-IO: ai/prompt-io/claude/20260413T192116Z_f851f28_prompt_io.md
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Allow callers to explicitly declare transport
bind addrs instead of always auto-generating
random ones from ponged registrar addresses.
Deats,
- new `tpt_bind_addrs` kwarg wraps each input
addr via `wrap_address()` at init time.
- non-registrar path only auto-generates random
bind addrs when `tpt_bind_addrs` is empty.
- registrar path merges user-provided bind addrs
with `uw_reg_addrs` via `set()` union.
- drop the deprecated `arbiter_addr` param and
its `DeprecationWarning` shim entirely.
Also,
- expand `registry_addrs` type annotation to
`Address|UnwrappedAddress`.
- replace bare `assert accept_addrs` in
`async_main()` with a descriptive
`RuntimeError` msg.
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Use `cpu_scaling_factor()` headroom in
`test_peer_spawns_and_cancels_service_subactor`'s `fail_after` to avoid
flaky timeouts on throttled CI runners. Rename `arbiter_addr=` ->
`registry_addrs=[..]` throughout `test_spawning` and
`test_task_broadcasting` suites to match the current `open_root_actor()`
/ `open_nursery()` API.
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Drop the `.lstrip('/')` on the unix protocol value
so the lib-prepended `/` restores the absolute-path
semantics that `mk_maddr()` strips when encoding.
Pass `Path` components (not `str`) to `UDSAddress`.
Also, update all UDS test params to use absolute
paths (`/tmp/tractor_test/...`, `/tmp/tractor_rt/...`)
matching real runtime sockpath behavior; tighten
`test_parse_maddr_uds` to assert exact `filedir`.
Review: PR #429 (copilot-pull-request-reviewer[bot])
https://github.com/goodboy/tractor/pull/429#pullrequestreview-4018448152
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Strip leading `/` from `filepath` before building
the `/unix/{path}` multiaddr string; OW absolute
sockpaths like `/run/user/1000/tractor/foo.sock`
produce `/unix//run/..` which `py-multiaddr`
rejects as "empty protocol path".
Woops, missed this in the initial `mk_maddr()` impl
bc the unit tests only used relative `filedir` values
(which was even noted in a comment..). The bug only
surfaces when the `.maddr` property on `UDSTransport`
is hit during logging/repr with real runtime addrs.
Found-via: cross-suite `pytest tests/ipc/ tests/msg/`
where `tpt_proto='uds'` leaks into msg tests
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Cover `parse_maddr()` with unit tests for tcp/ipv4,
tcp/ipv6, uds, and unsupported-protocol error paths,
plus full `addr -> mk_maddr -> str -> parse_maddr`
roundtrip verification.
Adds,
- a `_maddr_to_tpt_proto` inverse-mapping assertion.
- an `wrap_address()` maddr-string acceptance test.
- a `test_reg_then_unreg_maddr` end-to-end suite which audits passing
the registry addr as multiaddr str through the entire runtime.
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Inverse of `mk_maddr()`: parse a multiaddr string like
`/ip4/127.0.0.1/tcp/1234` back into a tractor `Address`.
Deats,
- add `_maddr_to_tpt_proto` reverse mapping dict
- add `parse_maddr()` fn dispatching on protocol
combo: `[ip4|ip6, tcp]` -> `TCPAddress`,
`[unix]` -> `UDSAddress`
- strip leading `/` the multiaddr lib prepends to
unix protocol values for correct round-trip
- add `str` match case in `wrap_address()` for
`/`-prefixed multiaddr strings, broaden type hint
to `UnwrappedAddress|str`
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
All tests are registrar-actor integration scenarios
sharing intertwined helpers + `enable_modules=[__name__]`
task fns, so keep as one mod but rename to reflect
content. Now lives alongside `test_multiaddr.py` in
the new `tests/discovery/` subpkg.
Also,
- update 5 refs in `/run-tests` SKILL.md to match
the new path
- add `discovery/` subdir to the test directory
layout tree
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Cover `_tpt_proto_to_maddr` mapping, TCP (ipv4/ipv6),
UDS, unsupported `proto_key` error, and round-trip
re-parse for both transport types.
Deats,
- new `tests/discovery/` subpkg w/ empty `__init__.py`
- `test_tpt_proto_to_maddr_mapping`: verify `tcp` and
`uds` entries
- `test_mk_maddr_tcp_ipv4`: full assertion on
`/ip4/127.0.0.1/tcp/1234` incl protocol iteration
- `test_mk_maddr_tcp_ipv6`: verify `/ip6/::1/tcp/5678`
- `test_mk_maddr_uds`: relative `filedir` bc the
multiaddr parser rejects double-slash from abs paths
- `test_mk_maddr_unsupported_proto_key`: `ValueError`
on `proto_key='quic'` via `SimpleNamespace` mock
- `test_mk_maddr_roundtrip`: parametrized over tcp +
uds, re-parse `str(maddr)` back through `Multiaddr`
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Address Copilot review: the mapping table was
defined but never referenced. Now `mk_maddr()`
resolves `proto_key` -> maddr protocol name via
the table and rejects unknown keys upfront.
Also add missing `Path` import to the `multiaddr`
usage snippet.
Review: PR #429 (Copilot)
https://github.com/goodboy/tractor/pull/429#pullrequestreview-4010456884
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Drop the NIH (notinventedhere) custom parser (`parse_maddr()`,
`iter_prot_layers()`, `prots`/`prot_params` tables) which was never
called anywhere in the codebase.
Replace with a thin `mk_maddr()` factory that wraps the upstream
`multiaddr.Multiaddr` type, dispatching on `Address.proto_key` to build
spec-compliant paths.
Deats,
- `'tcp'` addrs detect ipv4 vs ipv6 via stdlib
`ipaddress` (resolves existing TODO)
- `'uds'` addrs map to `/unix/{path}` per the
multiformats protocol registry (code 400)
- fix UDS `.maddr` to include full sockpath
(previously only used `filedir`, dropped filename)
- standardize protocol names: `ipv4`->`ip4`,
`uds`->`unix`
- `.maddr` properties now return `Multiaddr` objs
(`__str__()` gives the canonical path form so all
existing f-string/log consumers work unchanged)
- update `MsgTransport` protocol hint accordingly
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Bump lock file to match obvi.
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
- "spawing" → "spawning", close unbalanced
backtick on `` `start_method='trio'` ``
- "uneeded" → "unneeded", "deats" → "details"
- Remove double `d` annotation; filter
`get_preparation_data()` result into only
`ParentMainData` keys before returning
- Use `pop('authkey', None)` for safety
Review: PR #1 (Copilot)
https://github.com/mahmoudhas/tractor/pull/1#pullrequestreview-4091096072
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Gud Boi
Bd
mahmoud