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Changelog

All notable changes to Reqon are documented here.

This project follows Semantic Versioning.

Unreleased​

No changes yet.

0.4.0​

Released 2026-06-30

Added​

  • Append-only execution event log — the durable foundation for execution state. The executor emits a structured event log, and resuming from it skips already-applied store effects.
  • Durable execution-log backends — transactional SqliteExecutionLog and multi-node PostgresExecutionLog, alongside the file store.
  • Pause, incremental sync, and trace as views over the execution log — unified on the single source of truth, including logged checkpoint.advanced and pause lifecycle events.
  • Crash-injection proof suite with self-healing of a torn execution-log tail, plus DURABILITY.md documenting the tested guarantees.
  • Resumable backfill pagination on the event log.
  • Stable Idempotency-Key for mutating fetches in durable mode.

Fixed​

  • Security hardening — redact secrets in logs, errors, and durable trace files; lock down token/pause files; confine store paths to the base directory (path traversal); validate and escape PostgREST filters and guard full-table clears; sandbox the MCP server (dryRun default, path confinement, arg validation).
  • Resilience and correctness — per-request HTTP timeout; gate retries on idempotency; treat 4xx as errors and cap empty/non-JSON responses; single-flight OAuth2 refresh; bound pagination memory and stop dropping/looping pages; require a real key for store dedup with deep-merge; fix setTimeout overflow on long timers; POSIX cron OR-fields evaluated in timezone with missed-tick catch-up; resume paused executions exactly once; isolate per-action state in parallel stages; atomic, crash-consistent file and trace writes.

Changed​

  • CI drops EOL Node 18; dependabot updates grouped monthly with minor/patch auto-merge.

0.3.0​

Released 2025-01-08

Added​

  • Durability features
    • Checkpoint/resume for fault-tolerant execution - missions can resume after crashes
    • Time-travel debugging with trace snapshots and replay
    • Resource-free pause step with webhook/timeout resume triggers
  • Control server for pause/resume and live status queries
  • Heartbeat support for monitoring long-running missions
  • Debug mode for step-through execution
  • VS Code extension for Reqon syntax highlighting
  • File store adapter for persistent JSON storage
  • bulkUpsert method on store adapters for efficient batch operations
  • Mock server demo for testing without real APIs

Changed​

  • Improved docs site with brand colors, logos, and better readability
  • Pre-commit hooks for lint and format
  • Better parallel action context isolation

Fixed​

  • Mobile hamburger menu visibility
  • Various test fixes and CI improvements
  • Share link URLs on docs site

0.2.0​

Released 2024-12-21

Added​

  • Object literal support in expressions
  • Guard clauses for conditional execution
  • Xero API example enabled

Changed​

  • Package renamed from reqon to reqon-dsl

0.1.0​

Released 2024-12-01

Initial release.

Added​

  • DSL syntax - Mission/action/step structure for declarative pipelines
  • HTTP fetching
    • GET, POST, PUT, PATCH, DELETE methods
    • Pagination strategies: offset, page number, cursor-based
    • Retry with exponential/linear/constant backoff
    • Incremental sync with since: lastSync
  • Store adapters
    • Memory (testing/temporary)
    • File (JSON persistence)
    • PostgREST/Supabase (SQL)
  • Authentication
    • OAuth2 with token refresh
    • Bearer token
    • Basic auth
    • API key (header or query)
  • Resilience
    • Rate limiting with pause strategy
    • Circuit breaker for cascading failure prevention
  • Scheduling
    • Cron expressions
    • Fixed intervals (seconds, minutes, hours, days)
    • Daemon mode for continuous execution
  • OpenAPI integration
    • Load specs from URL or file
    • Type-safe call syntax using operationId
    • Response validation against schema
  • Webhook support with wait step for async callbacks
  • CLI for running missions from terminal
  • MCP server for Model Context Protocol integration