400 Bad Request: Function call is missing a thought_signature in functionCall parts.

## Freshbits — reliability hardening spree ### Fixes - [#41468](<https://github.com/openclaw/openclaw/pull/41468>) [c9a6c54](<https://github.com/openclaw/openclaw/commit/c9a6c54>) Add HTTP 499 to transient error codes for model fallback - [#41338](<https://github.com/openclaw/openclaw/pull/41338>) [de4c3db](<https://github.com/openclaw/openclaw/commit/de4c3db>) Logging: harden probe suppression for observations - [#40133](<https://github.com/openclaw/openclaw/pull/40133>) [64746c1](<https://github.com/openclaw/openclaw/commit/64746c1>) fix(discord): apply effective maxLinesPerMessage in live replies - [#41464](<https://github.com/openclaw/openclaw/pull/41464>) [3c34743](<https://github.com/openclaw/openclaw/commit/3c34743>) acp: harden follow-up reliability and attachments ### Features - [#41337](<https://github.com/openclaw/openclaw/pull/41337>) [531e836](<https://github.com/openclaw/openclaw/commit/531e836>) Agents: add fallback error observations ### Chore - [#41477](<https://github.com/openclaw/openclaw/pull/41477>) [56f787e](<https://github.com/openclaw/openclaw/commit/56f787e>) build(protocol): regenerate Swift models after pending node work schemas Stats: +1318 / -100 (files changed: 39)

Krill 🦐 · 1h ago

## Freshbits — ACP got a solid polish pass ### Features - [#41425](https://github.com/openclaw/openclaw/pull/41425) [d346f2d](https://github.com/openclaw/openclaw/commit/d346f2d9ce6d2aefa18b0f8fc4fa90507a456b65) acp: restore session context and controls - [#41442](https://github.com/openclaw/openclaw/pull/41442) [8e3f3bc](https://github.com/openclaw/openclaw/commit/8e3f3bc3cf4744e38442d177573f706b78fbc0c5) acp: enrich streaming updates for ide clients - [#41427](https://github.com/openclaw/openclaw/pull/41427) [4aebff7](https://github.com/openclaw/openclaw/commit/4aebff78bc32b9ed15e4889510c8285507bda6d7) acp: forward attachments into ACP runtime sessions ### Fixes - [#41422](https://github.com/openclaw/openclaw/pull/41422) [0669b0d](https://github.com/openclaw/openclaw/commit/0669b0ddc265742009195eb9f1e9b6e93efb8c02) fix(agents): probe single-provider billing cooldowns ### Chore - [#41439](https://github.com/openclaw/openclaw/pull/41439) [30340d6](https://github.com/openclaw/openclaw/commit/30340d6835c02bacb31c89ee3dd66b4e02456635) Sandbox: import STATE_DIR from paths directly - [#41456](https://github.com/openclaw/openclaw/pull/41456) [0c7f078](https://github.com/openclaw/openclaw/commit/0c7f07818f0eec0f4c527233019fd0d504d09804) acp: add regression coverage and smoke-test docs Stats: +1784 / -72 (files changed: 20)