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bot-bottle/bot_bottle/backend/gateway_attach.py
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didericis-claude ffffe66c95 refactor(backend): base owns the gateway-attach flow, fail hard (0081 review)
Addresses review on #519 (@didericis 6143 + the fail-hard direction over the
codex skip).

Base owns the flow (6143 / ADR 0006). `attach_bottled_agents_to_gateway()` is
now a concrete method on `BottleBackend` that delegates to
`gateway_attach.reconcile_running_bottles`; backends override only three
primitives — `_gateway_attach_resources()`, `_running_bottles()`,
`_attach_bottle_to_gateway()`. The shared control flow + error policy live in
one place so a backend can't drift onto a bespoke loop or a silent skip. Keeps
the reconcile flow + `GatewayAttachResources` out of `backend/base.py` (the
size guardrail) in a dedicated `backend/gateway_attach.py`. New ADR 0006 records
the "shared behaviour in the base backend, subclasses override primitives"
theme.

Fail hard, never skip (the maintainer's direction over the codex review's
skip). Any attach failure now aborts bring-up instead of being logged and
skipped: a bottle that silently can't reach the fresh gateway (its egress just
starts failing TLS) is worse than a loud failure. Every bottle is attempted and
the failures are raised together (aggregate `InfraLaunchError`) so one bring-up
surfaces the full blast radius. Resource gathering (the CA fetch) also fails
hard. PRD 0081 goal + design updated to match (reversed from the earlier
"tolerate per-bottle failures" draft).

Bumps the base.py guardrail cap 580->600 for the new contract surface (the
delegator + 3 abstract primitives); the flow itself lives in gateway_attach.py.

Refs #516, #519.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-27 11:33:35 -04:00

55 lines
2.1 KiB
Python

"""The shared gateway-attach reconcile flow (PRD 0081).
`BottleBackend.attach_bottled_agents_to_gateway()` delegates here so every
backend reconciles running bottles against a freshly-booted gateway *the same
way* — the control flow + fail-hard policy live in one place and backends
override only the primitives (see ADR 0006). Kept out of `backend/base.py` so
the backend contract module stays lean (the base.py size guardrail).
"""
from __future__ import annotations
from dataclasses import dataclass
from typing import TYPE_CHECKING, Any
from .base import InfraLaunchError
if TYPE_CHECKING:
from .base import BottleBackend
@dataclass(frozen=True)
class GatewayAttachResources:
"""Everything a running bottle needs to (re)attach to the current gateway on
a cold boot (PRD 0081). Gathered once per reconcile and handed to every
bottle. The CA now; egress secrets and git-gate state join as the reconcile
grows (#516)."""
ca_pem: str
def reconcile_running_bottles(backend: "BottleBackend[Any, Any, Any]") -> None:
"""Reconcile every already-running bottle against the freshly-(re)booted
gateway: gather the attach resources once, then attach every live bottle.
Fail hard, never skip: a bottle that silently can't reach the fresh gateway
(its egress just starts failing TLS) is worse than a loud bring-up failure,
so any attach failure aborts bring-up. Every bottle is attempted first and
the failures are raised together, so one bring-up surfaces the full blast
radius rather than one bottle at a time."""
resources = backend._gateway_attach_resources()
failures: list[str] = []
for bottle in backend._running_bottles():
try:
backend._attach_bottle_to_gateway(bottle, resources)
except InfraLaunchError as exc:
failures.append(str(exc))
if failures:
raise InfraLaunchError(
f"could not attach {len(failures)} running bottle(s) to the "
f"freshly-booted gateway:\n " + "\n ".join(failures)
)
__all__ = ["GatewayAttachResources", "reconcile_running_bottles"]