docs(changelog): add #3162 fixed entries for resolve_model_ids and workflow._auto_chain_active

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -309,6 +309,17 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
   pre-existing sentinel force-removes the orphan worktree before starting fresh, making
   the agent self-healing across crashes. (#2839)
 
+### Fixed
+
+- **`config-set resolve_model_ids` no longer rejected** — `resolve_model_ids` was
+  documented in CONFIGURATION.md and read by model-resolution paths, but missing from
+  the CJS/SDK `VALID_CONFIG_KEYS` allowlists. Added to both. (#3162)
+- **`config-set workflow._auto_chain_active` no longer emits spurious errors** — this
+  internal runtime-state key is written by `plan-phase`, `execute-phase`,
+  `discuss-phase`, `transition`, and `new-project` workflows via `config-set`, but was
+  excluded from the public allowlist after #2530. A new `RUNTIME_STATE_KEYS` set lets
+  `isValidConfigKey()` accept it without exposing it as a user-settable option. (#3162)
+
 
 ## [1.39.1] - 2026-05-01