design: the shared crate is bxcore (decision of 2026-09-26)
Code constraints: `proto` became `bxcore` in M5b task 00 and holds the code roles share as well as the shared types. Recorded in docs/decisions.md with the M5b spec. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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@@ -246,14 +246,14 @@ Files are the source of truth. SQLite is allowed only for rebuildable indexes an
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| Crate | Purpose |
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|---|---|
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| `proto` | Defines the data every role shares and the frame format they exchange it in. |
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| `bxcore` | Defines the data every role shares and the frame format they exchange it in, and holds the code roles share: the secret store and the sanitizer. Called `proto` until M5b. |
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| `toolkit` | Holds the programs that run inside tool containers. |
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| `bxctl` | Is the owner's command line: chat, local approvals, checks and maintenance. |
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- No source file over 500 lines. No crate depends on another role's crate, only on `proto`.
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- No source file over 500 lines. No crate depends on another role's crate, only on `bxcore`.
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- Authority is encoded in types: a tool cannot execute without a `Decision` value that only
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`brokerd`'s policy module can construct. `Decision` is defined in `brokerd`, has a private
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field and does not implement `Deserialize`, so no other crate or wire message can produce one.
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`proto` carries a plain `DecisionRecord` for the audit log and the wire.
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`bxcore` carries a plain `DecisionRecord` for the audit log and the wire.
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- Dependencies are few and justified in `docs/dependencies.md`. `cargo-deny` runs in the gate.
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- `make gate` runs offline. Checks that need straylight run in `make verify-device`.
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- No telemetry, no update checks, no outbound call not listed in `docs/egress.md`.
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