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fix(sdk): classify a missing adapter by structured signal only #257

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Merged
adnanrhussain merged 2 commits into from
Aug 31, 2026
Merged

fix(sdk): classify a missing adapter by structured signal only #257

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937d2bf
fix(sdk): classify a missing adapter by structured signal only
adnanrhussain Aug 30, 2026
4c46c3e
docs(sdk): match the comment to the cause-chain walk
adnanrhussain Aug 30, 2026
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10 changes: 6 additions & 4 deletions sdks/typescript/src/providers/ai-sdk-provider.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -14,13 +14,15 @@ const NOT_INSTALLED = new Set(['ERR_MODULE_NOT_FOUND', 'MODULE_NOT_FOUND']);
* not-installed case keeps the original as `cause` either way.
*/
function adapterImportError(error: unknown, vendor: string, pkg: string): unknown {
// Walked, not read off the top: bundlers and test loaders wrap an import failure in their
// own error and keep the real one as `cause`, so the resolution code is often one level down.
// Structured signal only, per SPEC §6.5: wording is not a contract, and matching on it
// would reclassify an adapter that failed to load for some other reason. Walked rather
// than read off the top, because bundlers and test loaders wrap an import failure in their
// own error and keep the real one as `cause` — sometimes through more than one layer, hence
// walking the chain rather than checking a fixed depth.
const missing = (function isMissing(e: unknown, depth = 0): boolean {
if (e === null || typeof e !== 'object' || depth > 4) return false;
const { code, message, cause } = e as { code?: unknown; message?: unknown; cause?: unknown };
const { code, cause } = e as { code?: unknown; cause?: unknown };
if (typeof code === 'string' && NOT_INSTALLED.has(code)) return true;
if (typeof message === 'string' && /cannot find (module|package)/i.test(message)) return true;
return isMissing(cause, depth + 1);
})(error);

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