proffesor-for-testing__agentic-qe/docs/releases/v3.9.0.md

v3.9.0 Release Notes

Release Date: 2026-04-02

Highlights

Major production-hardening release with 11 CC-internals improvements, a 4-tier context compaction pipeline, extensible plugin architecture, and a background QE Quality Daemon — backed by 466+ new tests.

Added

• CC-internals improvements (IMP-00 through IMP-10) — 11 improvements across 4 priority tiers, all integrated into production code paths with comprehensive test coverage.
• 4-tier context compaction pipeline — Progressive memory compaction: microcompact (tier 1), session summary (tier 2), LLM compact (tier 3), reactive eviction (tier 4). Context budget tracking prevents overflows.
• Plugin architecture — Extensible plugin system with lifecycle management, manifest validation, dependency resolution, security sandboxing, and caching. Supports local, GitHub, and npm sources.
• QE Quality Daemon — Background quality monitoring with priority queue, git watcher, coverage delta analyzer, CI monitor, test suggester, nightly consolidation, notification service (SSRF-guarded), and persistent SQLite memory.
• Retry engine — Configurable retries with exponential backoff, jitter, circuit breaker, and per-error-class strategies.
• Prompt cache latch — Field-level caching controls to reduce redundant LLM calls.
• Session durability middleware — MCP session persistence and resume across connection drops.
• Startup fast paths — Parallel module prefetch and fast-path boot for unused subsystems.
• Hook security hardening — SSRF guard, config snapshot verification, standardized exit codes.
• 8 env var kill switches — Granular feature control: AQE_MICROCOMPACT, AQE_RETRY_DISABLED, AQE_SESSION_DURABILITY, AQE_PROMPT_CACHE_LATCH, AQE_FAST_PATHS, AQE_HOOKS_SSRF_DISABLED, AQE_COMPACTION_DISABLED, AQE_PLUGINS_DISABLED.
• aqe daemon and aqe plugin CLI commands — Manage the QE daemon and plugins from the command line.

Changed

• Lazy-load CLI handlers — Heavy imports deferred until command execution, reducing startup cost.
• esbuild code splitting — Chunk output with splitting for smaller initial bundles.
• CLI index refactored — Workflow command extracted, lazy-registry for on-demand loading.

Fixed

• Internal log leak to stdout — Internal prefixed logs redirected to stderr.

Stats

• 107 files changed, 20,304 insertions, 2,781 deletions
• 466+ new tests across 37 test files
• 3 commits since v3.8.14