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Timeout timing/classification was re-implemented three ways across the tool-bearing capabilities, with the fusion of timeout+cancel and the timeout-vs-cancel reason recovery being the error-prone parts. Extract that shared half into a zero-dependency @deepseek-ai/dsh-timeout library (clampTimeout/deadline/timeoutOf/TimeoutReason) and leave the non-shareable hard-kill in each capability, per the timeout-library RFC. bash: run() owns the deadline; runBash drops its killTimer and no longer classifies (SpawnSpec/SpawnOutcome lose timeoutMs/timedOut/aborted), so the public timedOut/aborted booleans become mutually-exclusive first-abort classifications. web_fetch: the hand-rolled controller/timer/listener/ signal.reason dance is replaced by provider-owned deadline/timeoutOf, keeping the WEB_FETCH_TIMEOUT / WEB_ABORTED contract. fs stays timeout-free (README states why).
13 lines
1.6 KiB
Markdown
13 lines
1.6 KiB
Markdown
# util/ — low-level shared utilities
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Zero-dependency primitives shared across the other groups. A package lands here when it owns a tiny, foundational type or helper that several capability families need but that belongs to none of them — keeping it out of any one group avoids a capability package depending on an unrelated one just to reach a shared primitive. These are **support** packages: small, stable, and free of harness dependencies.
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| Package | Role |
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|---|---|
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| `brand/` | The type-only `Branded<B>` nominal-typing primitive (no runtime code, no harness deps) |
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| `timeout/` | The timing/classification half of a timeout — `clampTimeout`/`deadline`/`timeoutOf`/`TimeoutReason` (pure functions, no harness deps); termination stays in each capability |
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`dsh-brand` is the canonical case: it owns ONLY the `Branded<B>` helper, so a capability package can brand the ids it owns (`dsh-bash`'s `BashTaskId`/`OwnerToken`, `dsh-session`'s `SessionId`, …) by depending on `dsh-brand` alone, without pulling in an unrelated package just to reach `Branded`.
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`dsh-timeout` follows the same shape for the timeout family: `dsh-bash` and `dsh-web-fetch-local` each fuse a caller's cancellation with a deadline and later classify "timed out" vs "cancelled" by depending on `dsh-timeout` alone. It deliberately owns only the timing/classification half — the *termination* (SIGKILL a process group, tear down a fetch socket) stays in each capability, because no shared layer can own every capability's kill (see [the timeout-library RFC](../../docs/rfc/implemented/architecture/2026-07-06-timeout-deadline-library.md)).
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