fix(core): v3 list actions accepted a filter shape that crashed them

[IgorShevchik]

Two bugs found while measuring the TypeCallParams options for #279. Both non-breaking, both belong in 2.x rather than waiting for the 3.0.0 batch.

1. A documented filter shape crashed the v3 list actions

TypeCallParamsV3.filter accepts the v3 array of triples and the v2 object dialect, kept deliberately for backward compatibility. That union is right for a single call, which forwards the filter untouched.

It is wrong for callList / fetchList. Those emulate keyset pagination by appending [cursorIdKey, '>', cursor] to the filter on every page:

buildParams: cursor => ({ ...requestParams, filter: [...requestParams.filter, [cursorIdKey, '>', cursor]] })

An array is not a preference there — it is the only shape the mechanism can extend. So:

await b24.actions.v3.callList.make({ method: 'tasks.task.list', params: { filter: { '>id': 100 } } })
// TypeError: filter is not iterable  ← one page into the walk

…on a shape the public type allows and the documentation promises. Confirmed by running it, not by reading it:

$ node -e "const f = { '>id': 100 }; try { [...f] } catch (e) { console.log(e.message) }"
objFilter is not iterable

Fix. The two list actions narrow filter to TypeFilterV3 in their own options type, so the mistake becomes a compile error instead of a crash. A runtime guard catches the JavaScript caller's version of the same mistake and throws SdkError with JSSDK_ACTION_V3_LIST_FILTER_NOT_ARRAY and a message naming what to write instead.

Not a behaviour change anyone can be relying on: the path this closes could only ever throw. Five tests, and the guard is mutation-verified — removing it brings back filter is not iterable.

2. The v2 batch request envelope had no name

TypeHttp.call types its params as TypeCallParams, and the batch request rides through it. { halt, cmd } is neither a filter nor a select; it type-checks only because of the permissive index signature. BatchRequestEnvelopeV2 gives the shape a name at the site that builds it.

On the v3 side there is no envelope at all — the commands are the request body — so the cast there stays, now with a comment saying why rather than looking like an oversight.

Same class as the response-envelope mistyping fixed in #395, from the other direction.

Context: this settles #279's blocking item

While measuring, two things about #279 turned out to be stale, both recorded in a comment there:

• Its stated justification — "params['filter'] = 123 compiles" — is no longer true. docs(jsdoc) + types: fill @todo docs (#154) and type request-side filters (#153) #280 made TypeCallParamsV2/V3 an intersection, and in an intersection the declared property beats the inherited index signature. Both element and dotted access are already rejected.
• Removing the index signature would reject the ordinary way the API is called, not an escape hatch. Counting the call params written across docs/content, skills/ and playgrounds/: id 31×, entityTypeId 16×, then fields, taskId, iblockId, PLACEMENT… against 14 filter. crm.item.get is { entityTypeId, id }.

The decision taken: keep the index signature, narrow its value type from any to unknown in 3.0.0 (measured cost: 3 sites, of which one is inside the deprecated callMethod that #277 deletes anyway, and the other two are the bug fixed here). Per-method parameter types are the only option that would catch a fitler typo, and that is a separate project rather than a checklist item.

With that settled, #279 stops blocking the 3.0.0 scope freeze.

Checks

• pnpm run typecheck — all eight passes, 0 errors
• jsSdk:unit + jsSdk:types + skills:unit
• lint (1 pre-existing unrelated warning in docs/server/api/ai.post.ts), lint:md, docs-lint --strict, md-internal-links, check-api-reference-index
• Portal-backed projects not run — no transport behaviour changed, and the one path that did change could previously only throw.

Docs

2.call-list-rest-api-ver3.md and 2.fetch-list-rest-api-ver3.md described params as Omit<TypeCallParams, 'pagination' | 'order'>, which is now stale, and neither mentioned that the object filter cannot work here. Both updated, with the reason rather than just the rule.

Refs #279

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https://claude.ai/code/session_01F22e2ft66y7nuBJjzdThBr

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