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bot-bottle/claude_bottle/backend/smolmachines/bottle.py
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feat(smolmachines): backend skeleton + Smolfile/gvproxy renderers (PRD 0023 chunk 1)
Ships the smolmachines backend's prepare side: subpackage layout,
`_BACKENDS` registration under "smolmachines", preflight check
for `smolvm` + `gvproxy` on PATH, and the two config-file
renderers (Smolfile TOML + gvproxy YAML). Launch raises
NotImplementedError until chunk 2.

New module layout (mirrors backend/docker/):
  claude_bottle/backend/smolmachines/
    __init__.py            re-exports SmolmachinesBottleBackend
    backend.py             SmolmachinesBottleBackend façade
    bottle.py              SmolmachinesBottle stub (NotImpl until ch2)
    bottle_plan.py         SmolmachinesBottlePlan + .print()
    bottle_cleanup_plan.py SmolmachinesBottleCleanupPlan stub
    prepare.py             resolve_plan: writes both config files
    smolfile.py            TOML renderer (stdlib, no tomli_w dep)
    gvproxy_config.py      YAML renderer (same shape as pipelock_yaml)
    util.py                preflight + per-slug subnet + loopback port

The renderers are pure functions. `resolve_plan` runs the
preflight, allocates one host-side loopback port per active
sidecar (pipelock always; git-gate / supervise conditional),
derives a per-slug gvproxy subnet (hash-mod-254, skipping the
docker-default 17), and writes:

  - <stage>/gvproxy.yaml: subnet + DNS rule resolving only
    `proxy.internal` + port_forwards (one per active sidecar).
  - <stage>/smolfile.toml: guest command/env + virtio-net device
    backed by gvproxy's unixgram socket. No TSI flags — see
    PRD 0023 "Why gvproxy, not TSI".

The agent's HTTPS_PROXY etc. point at `proxy.internal:<gateway-
port>` so the guest dials through gvproxy. gvproxy resolves only
`proxy.internal` → the gateway IP, and forwards exactly the
listed ports to the host-side sidecar bundle (PRD 0024); every
other destination — host LAN, host loopback, public internet
directly — is unreachable by construction.

29 new unit tests covering renderer correctness, subnet
derivation stability + collision-avoidance, loopback port
allocation, and preflight error paths. Full unit suite: 532
passing.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-27 02:22:08 -04:00

42 lines
1.2 KiB
Python

"""SmolmachinesBottle — runtime handle stub (PRD 0023 chunk 1).
The chunk-1 backend doesn't launch VMs yet, so this class only
exists to make `SmolmachinesBottleBackend.launch` resolvable at
import time. Every method raises NotImplementedError; chunk 2
gives it real `smolvm machine exec` plumbing."""
from __future__ import annotations
from .. import Bottle, ExecResult
class SmolmachinesBottle(Bottle):
"""Stub. Real impl lands in chunk 2."""
def __init__(self, name: str) -> None:
self.name = name
def exec_claude(self, argv: list[str], *, tty: bool = True) -> int:
del argv, tty
raise NotImplementedError(
"smolmachines backend chunk 1 ships prepare-only; "
"exec_claude lands in chunk 2"
)
def exec(self, script: str) -> ExecResult:
del script
raise NotImplementedError(
"smolmachines backend chunk 1 ships prepare-only; "
"exec lands in chunk 2"
)
def cp_in(self, host_path: str, container_path: str) -> None:
del host_path, container_path
raise NotImplementedError(
"smolmachines backend chunk 1 ships prepare-only; "
"cp_in lands in chunk 2"
)
def close(self) -> None:
pass