release: 1.21.0

[stainless-app]

Automated Release PR

1.21.0 (2026-03-23)

Full Changelog: v1.20.0...v1.21.0

Features

• [TPUF-1097] tpuf: return failed IDs for conditional writes (274882a)
• add ContainsAnyToken and RankByKnn types (d099bc4)
• Add float, []float and []bool to the list of valid types in the OpenAPI spec. (bb2e629)
• Add instructions to MCP server config (efe05c6)
• Add ranking-by-attribute to the spec. (72e62a7)
• add support for limit query parameter (b1aa74f)
• Add vector attribute schema to metadata endpoint (c87e6f1)
• add WithParams variant to BM25 and ContainsAllTokens (f3776a5)
• Allow for a CMEK key to be specified in copy_from_namespace (ff2c7e1)
• always install orjson, even without the [fast] extra (#192) (ae08f53)
• api: api update (67dbc25)
• api: introduce dedicated Query model (bc09dc2)
• clean up environment call outs (df0cf2f)
• client: add custom JSON encoder for extended type support (97e07e3)
• client: add support for aiohttp (a0a7b69)
• client: add support for binary request streaming (263636f)
• client: support file upload requests (656ce2a)
• ContainsAnyToken last_as_prefix docs (1b567a9)
• disable compression by default (#190) (64a459c)
• improve future compat with pydantic v3 (e55b78b)
• Make type required on AttributeSchemaConfig (9596ee0)
• Make word_v2 the default FTS tokenizer (36844eb)
• Metadata endpoint updates (e.g. to track indexing progress) (160cf02)
• openapi: Fix stainless warnings (d7f205b)
• openapi: name variants of NamespaceMetadata.index (a1cb762)
• Promote disable_backpressure to first-class Write property (649dd65)
• python: swap stainless to the new client edition to pick up uv (382415b)
• Remove queries from recall endpoint (dfac196)
• remove compatibility shims (#196) (b614dc4)
• required for patch_by_filter 🤦 (5edaf73)
• Response performance object (30bf271)
• sdks: add <patch|delete>_by_filter_allow_partial options (2fbc4a2)
• site: add ascii_folding to docs and SDKs (16535c4)
• spec: add dedicated type for AggregationGroup response (53459e4)
• spec: add support for cross-org CFN to SDKs (8ecd204)
• spec: clean up limit codegen (8046c93)
• spec: disable CopyFromNamespace syntax sugar in Go (08d1660)
• spec: host MCP on stainless (e4ce55d)
• stainless: add patch_by_filter (f277aa1)
• tpuf-engine: add verbose form of branch_from_namespace (ca4b577)
• tpuf: add branching to openapi spec (c21cd2c)
• tpuf: add include_ground_truth option to recall endpoint (6cec9b7)
• types: replace List[str] with SequenceNotStr in params (0283310)

Bug Fixes

• add support for $ref_new expressions (#132) (089686b)
• add support for regex filter (98940c6)
• api: add support for [Not]Contains[Any] operators (#135) (c317be2)
• api: add support for group_by query parameter (d6dcfd3)
• api: api update (4442b97)
• api: api update (4248358)
• api: api update (21ff62c)
• api: api update (eca0afb)
• api: api update (6ec2e1c)
• api: api update (93b4a37)
• api: api update (42fc34d)
• api: api update (b5b879f)
• api: api update (eb80dcd)
• api: api update (59859d0)
• api: api update (c5dd8d1)
• api: api update (bdb172e)
• api: api update (2d71653)
• api: api update (3fd547b)
• api: api update (f83ded0)
• avoid newer type syntax (c048387)
• ci: correct conditional (1226da3)
• ci: release-doctor — report correct token name (7761744)
• client: close streams without requiring full consumption (ec66734)
• client: don't send Content-Type header on GET requests (022b258)
• client: use higher retry delay precision (9ae54bd)
• compat with Python 3.14 (acdd36d)
• compat: compat with pydantic<2.8.0 when using additional fields (09b2a6a)
• compat: update signatures of model_dump and model_dump_json for Pydantic v1 (5d70dcf)
• correct name of stainless bot (#133) (27bf031)
• deps: bump minimum typing-extensions version (8c87152)
• docs: add note about attribute flattening to upgrade guide (#115) (568348d)
• docs: fix mcp installation instructions for remote servers (f9021c6)
• don't require region unless baseUrl contains {region} placeholder (#137) (f27bf12)
• don't run grouped tests in parallel (#125) (9024587)
• don't set region in tests if base URL doesn't support it (b7e8297)
• ensure streams are always closed (d3a57f9)
• explicitly omit TURBOPUFFER_BASE_URL from env when necessary (9075015)
• formatting (5c5fbfa)
• guide: add an upgrade guide (5a9e1b0)
• guide: update UPGRADING.md (c124d29)
• improve custom JSON deserialization (a874f8f)
• more precise types for filters that take arrays (dc6a2d2)
• parsing: correctly handle nested discriminated unions (ab05d54)
• parsing: ignore empty metadata (60f16d4)
• parsing: parse extra field types (ce30a1f)
• pydantic: do not pass by_alias unless set (de9ede8)
• README: add alpha notice (14aac9d)
• README: improve headline example (#131) (7314e3a)
• README: update code examples (12e9cca)
• remove 200 error code for hint_cache_warm API call (always 202 now) (05c43a7)
• sanitize endpoint path params (cde1c36)
• serialize datetime objects when orjson isn't installed (#143) (c3c83eb)
• strict types for new QueryParam type (fae8c4d)
• strict types for write conditions (#130) (0d8f6a1)
• tests: mock delete when testing namespace default params (#116) (db587e8)
• tests: mock delete whne testing namespace default params (072f33a)
• tests: use BM25 query with distinct scores (#179) (8ebe6ff)
• typing of upsert_columns tests (e08eb71)
• update tests for new metadata endpoint (8de7300)
• use async_to_httpx_files in patch method (dd4e2d4)
• use strict types for explain_query (#148) (13b9b70)

Performance Improvements

• skip unneeded transformations for primitive types and tuples (#178) (946ad60)

Chores

• add missing Union import in namespace_write_params.py (f16933a)
• bump httpx-aiohttp version to 0.1.9 (e637dca)
• ci: change upload type (9170d90)
• ci: only run for pushes and fork pull requests (55fd498)
• ci: skip uploading artifacts on stainless-internal branches (ab588f5)
• ci: upgrade actions/github-script (6579e7c)
• codegen updates (c7b662d)
• configure new SDK language (621f6a2)
• Correct python types for patch by filter (and conditional writes) (#172) (caa9cf6)
• deps: mypy 1.18.1 has a regression, pin to 1.17 (093835d)
• do not install brew dependencies in ./scripts/bootstrap by default (642ecd0)
• docs: use environment variables for authentication in code snippets (7d8f0e0)
• fix automatic type regeneration (8fbf95c)
• format all api.md files (b6fdecc)
• internal/tests: avoid race condition with implicit client cleanup (c6e0010)
• internal/tests: avoid race condition with implicit client cleanup (b041c1f)
• internal: add request options to SSE classes (a7a73b1)
• internal: add Sequence related utils (a54d6e3)
• internal: bump dependencies (1e1cfd9)
• internal: bump pinned h11 dep (e3e8ffb)
• internal: change ci workflow machines (80fafa9)
• internal: codegen related update (985c78f)
• internal: codegen related update (539dd89)
• internal: codegen related update (4db3df2)
• internal: codegen related update (11319f2)
• internal: codegen related update (1fcdb49)
• internal: detect missing future annotations with ruff (6a7d4c3)
• internal: fix lint error on Python 3.14 (52c1081)
• internal: fix ruff target version (46f2aae)
• internal: grammar fix (it's -> its) (0231191)
• internal: make test_proxy_environment_variables more resilient (bd36cd0)
• internal: make test_proxy_environment_variables more resilient to env (d870a2d)
• internal: move mypy configurations to pyproject.toml file (05aecc3)
• internal: remove mock server code (557357f)
• internal: tweak CI branches (c9f5d89)
• internal: update actions/checkout version (3b408b0)
• internal: update comment in script (228c590)
• internal: update gitignore (a9d2891)
• internal: update pydantic dependency (13ecfe2)
• internal: update pyright exclude list (c9f9475)
• package: drop Python 3.8 support (a20280f)
• package: mark python 3.13 as supported (2c2d349)
• project: add settings file for vscode (df8c3fa)
• readme: fix version rendering on pypi (8468a19)
• readme: update badges (d03eb1a)
• regenerate custom types (6345281)
• speedup initial import (3686da0)
• tests: skip some failing tests on the latest python versions (18e64f5)
• types: change optional parameter type from NotGiven to Omit (2f0ae47)
• update @stainless-api/prism-cli to v5.15.0 (1389727)
• update github action (d22c67d)
• update lockfile (9fc74d5)
• update mock server docs (d29d55b)

Documentation

• add cross-region copy_from_namespace to write API docs (58433b5)
• client: fix httpx.Timeout documentation reference (320cee5)
• hint_cache_warm also update header and openapi (fda1d58)

Refactors

• types: use extra_items from PEP 728 (9b36d34)

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Note

Low Risk
Low risk: this PR only updates version numbers, release manifest/changelog content, and adds .stdy.log to .gitignore, with no runtime logic changes.

Overview
Release prep for 1.21.0.

Bumps the package/version metadata (pyproject.toml, src/turbopuffer/_version.py, .release-please-manifest.json) from 1.20.0 to 1.21.0 and appends the 1.21.0 section to CHANGELOG.md. Also updates .gitignore to ignore .stdy.log.

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