fix: reject broken configs and improve accuracy feedback with isolated agent state

README.md

@@ -2,6 +2,30 @@
 
 This repository is packaged for the ModelHub XC agent platform.
 
+## Accuracy release 2026.10.18.1
+
+This release rejects malformed YAML command arrays, including the observed
+`/opt/entrypoint.sh    - /model` executable error, even in restored cached
+official configurations. It preserves terminal compatibility errors when a
+log also contains transient platform resource messages. Framework scoring
+includes unresolved non-platform failures; sparse model-profile evidence is
+blended with eight prior observations instead of discarded below a threshold.
+
+For operation alongside the baseline agent, the new default state branch is
+`agent-state-accuracy-v2`. Do not override it with the baseline's `agent-state`.
+The separate branch starts its own checkpoint on first boot; it does not
+overwrite or migrate the baseline state. New submissions retain agent version,
+instance ID and platform strategy ID. Historical tasks are not assigned an
+invented version.
+
+`MODELHUB_COEXISTENCE_MODE=1` is the default: this agent does not run queue
+cancellation, including deterministic cleanup, because the accounts are shared
+with the baseline. Submission preflight remains enabled. Set this variable to
+`0` only when account-wide cleanup is intended; `--disable-queue-cleanup` still
+disables cleanup explicitly. The baseline agent is unchanged. Both agents share
+account capacity and platform deduplication; separate state does not reserve
+capacity or eliminate simultaneous submission races.
+
 ## Platform Contract
 
 - Root-level `Dockerfile`
@@ -67,7 +91,7 @@ Optional tuning:
 - `MODELHUB_RECENT_MODEL_RESERVE_SLOTS` default `5` per account
 - `MODELHUB_RECENT_MODEL_DAYS` default `7`
 - `MODELHUB_STATE_SYNC_REMOTE` default `https://dev.modelhub.org.cn/CoolBoy/submmit.git`
-- `MODELHUB_STATE_SYNC_BRANCH` default `agent-state`
+- `MODELHUB_STATE_SYNC_BRANCH` default `agent-state-accuracy-v2`
 - `MODELHUB_STATE_SYNC_BATCH_SIZE` default `20`
 
 Git state synchronization reads `modelhub_user_name`, `modelhub_user_email`, and
@@ -140,7 +164,8 @@ unvetted GPU or framework.
 ## Durable State Branch
 
 The hosted worker synchronizes an allowlisted runtime snapshot to the orphan
-`agent-state` branch of this repository. Before each batch of at most 20 API
+`agent-state-accuracy-v2` branch of this repository (overridable via
+`MODELHUB_STATE_SYNC_BRANCH`). Before each batch of at most 20 API
 submissions it pushes write-ahead intents containing model, GPU, task, framework,
 safe parameter vector, and a config fingerprint. It pushes task IDs and results
 after the batch. If either push fails, no further submission begins until the