[TexasCoding]

Closes #569

Spec drift (run 41840096378): core spec 3.35.0 → 3.36.0, perps SCM spec params, AsyncAPI description-only.

Changes

• MarketPosition.netting_enabled: bool | None = None. The spec marks it required; it's kept optional, with an EXCLUSIONS entry of kind server_omits_despite_required.
• Klear margin, sync and async, page and *_all:
  • obligation_history: keyword-only settlement_start_ts / settlement_end_ts
  • settlement_balance_history: keyword-only start_ts / end_ts
  • Each accepts datetime | str. A naive datetime is treated as UTC and sent as RFC3339. A parameter is only sent when it isn't None.
• Version 22.8.0, CHANGELOG, docs (docs/perps.md, docs/resources/portfolio.md).
• kalshi/_generated/ regenerated by the scripts (no diff).

Blast radius (hand-written; GitNexus unavailable)

• MarketPosition: new optional field. Existing payloads without it still validate, and extra="allow" is unchanged. Users of portfolio.positions see None until the server sends it.
• Margin methods: only new keyword-only params with default None. Existing calls send exactly the same query as before. The new _rfc3339 helper is local to margin.py. GET requests keep their retry behavior; no POST/PUT/DELETE paths were touched.
• Nothing was removed or renamed, so this is a minor release.

Gates

ruff pass · mypy pass · unit tests 5088 passed, 3 skipped · strict contract tests 930 passed