chore(release): prepare 0.2.0 (#9)

Author: moonyue-w

CHANGELOG.md

@@ -5,6 +5,8 @@ existing `0.1.0` release; earlier development prereleases are not listed.
 
 ## [Unreleased]
 
+## [0.2.0] - 2026-09-24
+
 ### Added
 
 - Export `RequestTooLargeError` for HTTP 413 and `OverloadedError` for HTTP 529 from `qca` and `qca.common`, matching Anthropic's Python SDK.

CONTRIBUTING.md

@@ -114,7 +114,7 @@ Before the first release, create the GitHub `release` Environment with required
 
    ```bash
    gh workflow run release.yml --ref main \
-     -f version=0.1.1 \
+     -f version=0.2.0 \
      -f commit_sha=<40-character-main-sha> \
      -f batch_id=<safe-audit-token>
    ```

README.md

@@ -406,7 +406,7 @@ A static `pat` takes precedence over a provider, and an explicit `Authorization`
 
 ## Versioning
 
-This project follows [Semantic Versioning](https://semver.org). It is pre-1.0 and currently published as `0.1.0`, so the public surface may still change between releases. Anything prefixed with an underscore is internal and may change at any time.
+This project follows [Semantic Versioning](https://semver.org). It is pre-1.0, so the public surface may still change between releases. Anything prefixed with an underscore is internal and may change at any time.
 
 ```python
 import qca

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "qca-sdk"
-version = "0.1.0"
+version = "0.2.0"
 description = "Typed synchronous and asynchronous clients for Qoder Cloud Agents"
 authors = [{name = "Qoder"}]
 license = "MIT"