release: v1.0.0

First stable release. No behavioral changes from 0.15.0 — bumps the
public API surface to semver-stable.

Pre-release gates (all green):
- ruff: clean
- mypy --strict: 72 files, no issues
- twine check: PASSED on wheel + sdist
- pytest: 1413 unit tests passed

Bumps version in pyproject.toml + kalshi/__init__.py and adds the
1.0.0 CHANGELOG section summarizing the publish-readiness work
(LICENSE #42, README #41, classifier #43, project URLs #44, release
workflow #15) plus the coverage snapshot at ship time.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: TexasCoding

CHANGELOG.md

@@ -2,6 +2,40 @@
 
 All notable changes to kalshi-sdk will be documented in this file.
 
+## 1.0.0 — 2026-05-10
+
+First stable release. No behavioral changes from 0.15.0 — this release marks
+the public API surface as stable for semantic versioning.
+
+### Added
+- `LICENSE` file (MIT) — declared in `pyproject.toml` since 0.1.0 but not
+  shipped as a file; now included at repo root and in both wheel
+  (`dist-info/licenses/LICENSE`) and sdist artifacts (#42).
+- `README.md` — install, sync + async quickstart, env-var auth, demo vs
+  production, public/unauthenticated usage, order placement, WebSocket
+  streaming, error hierarchy, retry policy, pagination (#41).
+- `docs/RELEASING.md` — one-time PyPI trusted-publisher setup runbook plus
+  cut-a-release procedure.
+- `.github/workflows/release.yml` — tag-triggered release pipeline:
+  tag/version drift check, `uv build`, `twine check`, PyPI publish via
+  trusted publishing (OIDC, no token in repo secrets), GitHub Release
+  with CHANGELOG-extracted body and artifacts attached (#15).
+- `[project.urls]` extended from 3 → 6 keys (`Issues`, `Changelog`,
+  `PyPI`); `Documentation` retargeted to README anchor (#44).
+
+### Changed
+- `Development Status` classifier bumped from `3 - Alpha` to
+  `5 - Production/Stable` (#43).
+
+### Coverage at 1.0.0
+- 89/89 REST endpoints implemented (sync + async). 67 with live
+  integration tests; 20 SDK+unit only; 2 auth-gated (demo cannot
+  authenticate); 1 demo-broken (server-side).
+- 12 WebSocket message types dispatched with spec-aligned envelope and
+  payload types. 14 integration tests; 3 frame types live-verified.
+- 899 unit tests, mypy `--strict` clean, ruff clean, contract drift
+  tests on query/path/body/WS-payload schemas.
+
 ## 0.15.0 — 2026-04-19
 
 ### Fixed — WebSocket payload type drift

kalshi/__init__.py

@@ -198,4 +198,4 @@
     "UserDataTimestamp",
 ]
 
-__version__ = "0.15.0"
+__version__ = "1.0.0"

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "kalshi-sdk"
-version = "0.15.0"
+version = "1.0.0"
 description = "A professional Python SDK for the Kalshi prediction markets API"
 readme = "README.md"
 license = { text = "MIT" }