chore: release

[acp-release-bot]

🤖 New release

• agent-client-protocol-schema: 1.11.0 -> 1.12.0 (✓ API compatible changes)
• agent-client-protocol-json-schema-v1: 1.25.0 -> 1.26.0
• agent-client-protocol-json-schema-v2: 2.0.0-alpha.8 -> 2.0.0-alpha.9

Changelog

agent-client-protocol-schema

1.12.0 - 2026-10-16

Added

• (unstable-v2) patch upsert _meta by top-level key (#2372)
• (unstable) add client system prompt schema (#2361)
• (rust) implement Eq for content blocks (#2352)

Fixed

• (unstable) remove next edit suggestions (#2266)
• (schema) align v2 experimental feature compatibility (#2397)

Other

• (unstable-v2) define foreground state transitions (#2411)
• (v2) clarify replay IDs and unsupported cursors (#2398)
• (v2) align normative cancellation requirements (#2390)
• (unstable-v2) clarify prompt insertion contract (#2392)
• (unstable-v2) clarify foreground work lifecycle (#2387)
• (v2) clarify prompt cancellation when closing sessions (#2385)
• (schema) specify how git_patch writes paths (#2362)
• (unstable) clarify that a forked session is active (#2359)
• (schema) list full v2 session baseline on AgentCapabilities.session (#2358)
• (schema) clarify v2 foreground work can start without a prompt (#2357)

agent-client-protocol-json-schema-v1

1.26.0 - 2026-10-16

Added

• (unstable) add client system prompt schema (#2361)

Fixed

• (unstable) remove next edit suggestions (#2266)

Other

• (unstable) clarify that a forked session is active (#2359)

agent-client-protocol-json-schema-v2

2.0.0-alpha.9 - 2026-10-16

Added

• (unstable-v2) patch upsert _meta by top-level key (#2372)
• (unstable) add client system prompt schema (#2361)

Fixed

• (unstable) remove next edit suggestions (#2266)
• (schema) align v2 experimental feature compatibility (#2397)

Other

• (unstable-v2) define foreground state transitions (#2411)
• (v2) clarify replay IDs and unsupported cursors (#2398)
• (v2) align normative cancellation requirements (#2390)
• (unstable-v2) clarify prompt insertion contract (#2392)
• (unstable-v2) clarify foreground work lifecycle (#2387)
• (v2) clarify prompt cancellation when closing sessions (#2385)
• (schema) specify how git_patch writes paths (#2362)
• (unstable) clarify that a forked session is active (#2359)
• (schema) list full v2 session baseline on AgentCapabilities.session (#2358)
• (schema) clarify v2 foreground work can start without a prompt (#2357)

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