chore: release v0.18.1

[luizParreira]

🤖 New release

• agent-sdk-foundation: 0.18.0 -> 0.18.1 (✓ API compatible changes)
• agent-sdk-macros: 0.18.0 -> 0.18.1
• agent-sdk-providers: 0.18.0 -> 0.18.1 (✓ API compatible changes)
• agent-sdk-tools: 0.18.0 -> 0.18.1 (✓ API compatible changes)
• agent-sdk: 0.18.0 -> 0.18.1 (✓ API compatible changes)
• agent-sdk-otel: 0.18.0 -> 0.18.1
• agent-sdk-cli: 0.18.0 -> 0.18.1

Changelog

agent-sdk-foundation

0.18.1 - 2026-09-28

Added

• (providers) add bounded embedding API (#440)

Fixed

• (worker) close cancelled tool calls at the cancel seam; remove turn-path repair (#446)
• (journal) never persist or ship an invalid tool_use/tool_result sequence (#445)

agent-sdk-macros

0.18.0 - 2026-08-04

Other

• update Cargo.toml dependencies

agent-sdk-providers

0.18.1 - 2026-09-28

Added

• (providers) GPT-6 family and Claude Fable 5.1; fix prompt_cache_key length and Anthropic keep-alives (#455)
• (providers) add Claude Opus 5.5 capabilities (#454)
• (providers) add bounded embedding API (#440)

Fixed

• (providers) serialize image attachments as Chat Completions image_url parts (#451)
• (providers) fold openai-codex into the OpenAI attachment policy (#448)

agent-sdk-tools

0.18.1 - 2026-09-28

Added

• (server) durable tool-input preflight + atomic precompleted mixed-spawn (ENG-9548) (#442)

Other

• (ci) repair the rust 1.98 clippy and RustSec gate breakage on main (#452)

agent-sdk

0.18.1 - 2026-09-28

Added

• (providers) GPT-6 family and Claude Fable 5.1; fix prompt_cache_key length and Anthropic keep-alives (#455)
• (providers) add bounded embedding API (#440)
• (server) durable tool-input preflight + atomic precompleted mixed-spawn (ENG-9548) (#442)

Fixed

• (compaction) skip a summarization that returns no usable text (#450)
• (compaction) skip no-progress compaction; sanitize thinking blocks from non-final turns (#447)
• (mcp) omit absent client capabilities from the initialize handshake (#444)

Other

• (ci) repair the rust 1.98 clippy and RustSec gate breakage on main (#452)
• (dev) make local dev runtime-agnostic, drop the compose dependency (#438)

agent-sdk-otel

0.18.0 - 2026-08-04

Added

• (tls) let consumers choose the TLS backend (#436)

Other

• (deps) update every dependency and pin explicit feature sets (#435)

agent-sdk-cli

0.18.1 - 2026-09-28

Other

• (dev) make local dev runtime-agnostic, drop the compose dependency (#438)

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