825b57aff9
Introduce HarnessError in dsh-llm (the leaf package): a stable machine-routable
code distinct from the message, cause chaining, name from the subclass, plus
isHarnessError. LlmError, ToolArgsError, and InvariantError now extend it.
Tool failures carry the structure end-to-end: ToolExecutionResult gains
error: { name, code } (populated from a thrown HarnessError), and the loop
forwards it onto the tool/result session event (which gained the same optional
field) for retry/sandbox plugins and replay. The loop's toError wraps non-Error
throws in a HarnessError(code: UNKNOWN, cause) instead of a bare Error.
Landed last and in isolation so it's a pure upgrade over the plain Error+code
the earlier PRs used — independently revertible. Graduates RFC 005 pt 2 ->
ADR 0015; RFC 005 now fully implemented.
34 lines
1.3 KiB
TypeScript
34 lines
1.3 KiB
TypeScript
/**
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* The harness error taxonomy: one base class so failures carry a stable,
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* machine-routable `code` and chain their `cause`, instead of flattening to a
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* bare message string. Per-package errors extend {@link HarnessError}; the
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* tool layer surfaces `{ name, code }` on results and the session `tool/result`
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* event so retry/sandbox plugins and replay can distinguish failure classes.
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*
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* Lives in dsh-llm (the leaf package every other imports) so a single base is
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* shared without a new dependency edge. See ADR 0015.
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*
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* @module @deepseek-ai/dsh-llm/error
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*/
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/**
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* Base class for all harness errors. Carries a `code` (stable, programmatic —
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* e.g. `NO_ADAPTER`, `INVALID_ARGS`, `INVARIANT`) distinct from the
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* human-readable `message`, and supports `cause` chaining via the standard
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* `ErrorOptions`. `name` defaults to the subclass constructor name.
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*/
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export class HarnessError extends Error {
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readonly code: string
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constructor(message: string, code: string, options?: ErrorOptions) {
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super(message, options)
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this.code = code
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this.name = new.target.name
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}
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}
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/** Narrow an arbitrary thrown value to a HarnessError (for `instanceof` at seams). */
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export function isHarnessError(value: unknown): value is HarnessError {
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return value instanceof HarnessError
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}
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