v0.5.98: change detection improvements, rate limit and code execution fixes, removed retired models, hex integration

[waleedlatif1]

• fix(deploy): reuse subblock merge helper in use change detection hook (fix(deploy): reuse subblock merge helper in use change detection hook  #3287)
• fix(redis): prevent false rate limits and code execution failures during Redis outages (fix(redis): prevent false rate limits and code execution failures during redis outages #3289)
• feat(oauth): add CIMD support for client metadata discovery (feat(oauth): add CIMD support for client metadata discovery #3285)
• feat(tools): added hex (feat(tools): added hex #3293)
• fix(models): remove retired claude-3-7-sonnet and update default models (fix(models): remove retired claude-3-7-sonnet and update default models #3292)
• fix(hex): scope param renames to their respective operations (fix(hex): scope param renames to their respective operations #3295)

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs	Skipped		Feb 22, 2026 1:53am

[greptile-apps]

Greptile Summary

This release combines reliability improvements for Redis handling and code execution with new OAuth CIMD support, Hex integration, and retired model cleanup.

Key Changes:

• Redis Resilience: Added PING-based health monitoring, exponential backoff with jitter for reconnection, and graceful fallback to PostgreSQL when Redis is unavailable
• Rate Limiting: Changed from fail-closed to fail-open during storage errors to prevent service disruption
• Code Execution: Removed hard failures when distributed leases are unavailable, now falls back to local execution
• CIMD Support: Implemented Client ID Metadata Document discovery for OAuth flows with secure validation and caching
• Hex Integration: Added comprehensive Hex integration with 16 operations (run projects, manage collections, groups, users, data connections)
• Model Cleanup: Removed retired claude-3-7-sonnet-latest model definition
• Refactoring: Consolidated duplicate subblock merge logic into shared helper function

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• All changes are well-tested with comprehensive test coverage, improve system resilience through graceful degradation, follow established patterns (API key visibility), and properly handle edge cases (Redis outages, lease unavailability)
• No files require special attention

Important Files Changed

Filename	Overview
apps/sim/lib/core/config/redis.ts	Added health check with PING monitoring, reconnect listener system, and exponential backoff with jitter for better reliability
apps/sim/lib/core/rate-limiter/storage/factory.ts	Added graceful fallback to PostgreSQL when Redis is unavailable and reconnect listener to reset cached adapter
apps/sim/lib/core/rate-limiter/rate-limiter.ts	Changed error handling to fail open (allow requests) instead of fail closed when storage errors occur
apps/sim/lib/execution/isolated-vm.ts	Removed hard failure when distributed lease is unavailable, now falls back to local execution with per-process limits
apps/sim/lib/auth/cimd.ts	New CIMD (Client ID Metadata Document) implementation with caching, validation, and secure metadata fetching
apps/sim/lib/auth/auth.ts	Integrated CIMD support in OAuth flow, added client_id_metadata_document_supported to OAuth metadata
apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/deploy/hooks/use-change-detection.ts	Refactored to use shared mergeSubblockStateWithValues helper, eliminating duplicate logic
apps/sim/providers/models.ts	Removed retired claude-3-7-sonnet-latest model definition
apps/sim/blocks/blocks/hex.ts	New Hex block implementation with 16 operations for project management, runs, collections, groups, and data connections

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Rate Limiter Request] --> B{Storage Method?}
    B -->|Redis| C[Get Redis Client]
    B -->|DB| D[Use PostgreSQL]
    
    C --> E{Redis Available?}
    E -->|Yes| F[Use RedisTokenBucket]
    E -->|No| G[Fallback to PostgreSQL]
    
    F --> H{Storage Error?}
    G --> H
    D --> H
    
    H -->|Error| I[Fail Open - Allow Request]
    H -->|Success| J[Apply Rate Limit]
    
    K[Redis Health Monitor] -->|PING every 30s| L{PING Success?}
    L -->|Success| M[Reset Failure Count]
    L -->|Fail| N[Increment Failure Count]
    
    N --> O{3+ Failures?}
    O -->|Yes| P[Force Reconnect]
    O -->|No| K
    
    P --> Q[Notify Listeners]
    Q --> R[Reset Cached Adapter]
    R --> S[Exponential Backoff + Jitter]
    S --> C

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