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docs(specs): add spec 017, one network provider for every sandbox - #1354
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Proposes a refactor of the sandbox networking code. Today the own-IP setup lives in the minimald session layer: it allocates the lease, computes the tap parameters and owns the switch-refcount rollback, because sandbox2's `Network` trait can only describe post-spawn work. The same values then pass through four crates, and only one of the two paths that spawn a sandbox applies the trait at all — which is why an own-IP session's tasks silently fall back to `HostNet`. The spec gives `Network` a plan/attach/abandon shape, moves the launch sequence and the rollback into sandbox2, and reduces minimald to one mode-to-provider factory that the session and task paths share. Written to the new docs/specs/TEMPLATE.md format (the first spec to use it) with EARS requirements, and in ASD-STE100 language. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GjRz6QBru5tUFMXgU8R2J4
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📝 WalkthroughWalkthroughChangesThe pull request adds draft specification 017. It defines a shared Sandbox Network Provider
Priority: ⬇️ Low Estimated code review effort: 1 (Trivial) | ~5 minutes Change: Other Merge Risk: 🟡 Moderate · up to The proposed contract can still permit incorrect network isolation or cleanup behavior when implemented, and its required tests do not protect the task fail-closed path. Resolve these specification gaps before merge. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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Inline comments:
In
`@docs/specs/12-spec-sandbox-network-provider/12-spec-sandbox-network-provider.md`:
- Around line 222-227: Update the network_for specification to define the
normative NetworkMode-to-NetPlan mapping: NoNet must use an isolated plan,
HostNet must use a host plan, and own-IP mode must use an isolated plan with
deployment-specific tap and resolver settings. Ensure this contract makes
requirement 012-006 testable.
- Around line 62-65: Update the Sandbox::launch cancellation path so dropping
the launch future owns an executable cancellation guard that invokes
Network::abandon exactly once, rather than merely creating an unpolled
AbandonFuture. Ensure cleanup works both after plan() completes and while plan()
is pending, and add coverage for both cancellation scenarios.
- Around line 232-238: Update the specification around
sandbox2::Config::with_network, Sandbox::isolate_netns(), and network_for to
explicitly define whether custom Network values are trusted, constrained, or
removed when they conflict with network_mode. Document the migration path and
ensure the selected behavior preserves 012-006 enforcement for NoNet and own-IP
sandboxes.
- Around line 201-203: Expand the provider contract around the attach, abandon,
and teardown symbols to define the AttachFuture result, ownership transitions
from plan through attach or abandon, and the owner of rollback for attach
failures. Specify exactly-once tap and reservation cleanup, including whether
abandon is invalid once attach starts, and document the required state-machine
behavior for each transition.
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The task story read as an exec into a running session's namespaces, which is a different path (`nsenter.rs`, `setns(2)`). The task exec path builds its own sandbox, and a task run mints a session of its own, so a task is a PTask like an interactive session or a build. 012-005 now states the general rule — the mode of a PTask reaches the sandbox of that PTask — and keeps the session-inheritance case as a sub-bullet, which is where the drop to the host network belongs. Adds a non-goal and an open question for the missing mode option on a task run, which hardcodes the host network today. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GjRz6QBru5tUFMXgU8R2J4
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Inline comments:
In
`@docs/specs/12-spec-sandbox-network-provider/12-spec-sandbox-network-provider.md`:
- Around line 260-262: Define the build path’s inputs to network_for, including
how to derive the required PtaskIdentity and SessionPolicy before claiming build
support in 012-005. Document the contract alongside the existing task and
session path description so build calls can select their switch identity and
apply a defined policy.
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This was referenced Sep 10, 2026
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12 and 13 are taken by the GitHub sessions and min client core specs; 14–16 by other open spec PRs. Directory, file and in-document references move together; content is unchanged. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Inline comments:
In
`@docs/specs/17-spec-sandbox-network-provider/17-spec-sandbox-network-provider.md`:
- Line 63: Clarify requirement 017-002 by defining whether count(plan) includes
failed Network::plan() calls; preferably count only successfully completed
reservations, or condition the equality on successful planning and add an
explicit plan-failure case.
- Line 160: Make requirement 017-N01 measurable by defining the single-launch
baseline, identical workload, timing method, number of repetitions, and
permitted variance for comparing four concurrent own-IP sandbox starts against
the baseline. Alternatively remove 017-N01 if these acceptance criteria cannot
be established.
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…built Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Inline comments:
In
`@docs/specs/17-spec-sandbox-network-provider/17-spec-sandbox-network-provider.md`:
- Around line 235-245: The NetPlan API must expose the immutable namespace, tap,
and resolver data consumed by Network::plan and PlannedLaunch::plan. Add a
constructor that can represent Resolver::Nameservers and read-only accessors for
isolate_netns, tap, and resolver, or replace NetPlan with an equivalent public
immutable value while preserving existing host, isolated, and isolated_with_tap
behavior.
- Line 101: Add a minimald verification test covering task mode selection
through the exec.rs path: use an unavailable network provider with OwnIp, assert
the task reports an error, and verify that HostNet is not attached. Replace the
sandbox2-only verification command with the new minimald test so cleanup does
not pass without exercising the relevant task behavior.
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Lint: the same 16 advisory |
…-plan mapping in spec 017 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Proposes a refactor of the sandbox networking code. Today the own-IP setup lives in the minimald session layer: it allocates the lease, computes the tap parameters and owns the switch-refcount rollback, because sandbox2's
Networktrait can only describe post-spawn work. The same values then pass through four crates, and only one of the two paths that spawn a sandbox applies the trait at all — which is why an own-IP session's tasks silently fall back toHostNet.The spec gives
Networka plan/attach/abandon shape, moves the launch sequence and the rollback into sandbox2, and reduces minimald to one mode-to-provider factory that the session and task paths share.Written to the new docs/specs/TEMPLATE.md format (the first spec to use it) with EARS requirements, and in ASD-STE100 language.
Claude-Session: https://claude.ai/code/session_01GjRz6QBru5tUFMXgU8R2J4
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BREAKING CHANGE:footer present if this is a breaking changeSummary by CodeRabbit