v0.19.0

What's Changed

• fix(mcp): apply timeout to initialize handshake and list_tools by @bug-ops in #2823
• perf(context,llm): budget-first context assembly and turn-local embedding reuse by @bug-ops in #2824
• feat(core): supervised background task management and persist_message hot-path offload by @bug-ops in #2826
• perf(llm): bounded Candle inference worker + turn-level latency metrics by @bug-ops in #2825
• feat(bench): add zeph-bench crate scaffold, CLI subcommand, and deterministic mode by @bug-ops in #2840
• feat(bench): implement result writer and --resume support by @bug-ops in #2841
• feat(bench): implement LOCOMO, FRAMES, and GAIA dataset loaders by @bug-ops in #2842
• docs: complete rustdoc for all public APIs across Zeph project by @bug-ops in #2843
• docs: complete specs vault restructuring and migration to /specs by @bug-ops in #2844
• fix(mcp): add missing meta field and consolidate documentation URLs by @bug-ops in #2845
• feat(profiling): Phase 1 — profiling and tracing foundation by @bug-ops in #2862
• docs(specs): add graph memory sub-spec to 004-memory by @bug-ops in #2863
• docs(specs): add Prometheus metrics specification (036) by @bug-ops in #2864
• feat(profiling): implement Phase 2 deep instrumentation (#2851-#2857) by @bug-ops in #2869
• feat(metrics): Phase 1 — Prometheus metrics export foundation by @bug-ops in #2870
• ci: unify rust-cache shared-key to "ci" across registry-only jobs by @bug-ops in #2871
• feat(metrics): implement Phase 2 Grafana stack and Phase 3 histogram metrics (#2865) by @bug-ops in #2875
• fix(metrics): remove dead ZEPH_METRICS_HOST env var, add 120s histogram bucket, wire recorder tests by @bug-ops in #2876
• feat(profiling): implement Phase 3 and Phase 4 (#2858-#2861) by @bug-ops in #2877
• feat(bench): add isolation, LongMemEval, tau-bench loaders, and baseline comparison by @bug-ops in #2878
• fix(tui): wrap startup embed calls with tokio::time::timeout (#2879) by @bug-ops in #2880
• docs(specs): spec audit — close all gaps, add #37–#41 by @bug-ops in #2882
• fix(tracing): wire OTLP pipeline to Jaeger, remove dead ObservabilityConfig by @bug-ops in #2890
• fix(metrics): replace insert with replace in on_enter to avoid panic on async span re-entry by @bug-ops in #2891
• feat(core): BackgroundSupervisor Phase 2 — supervised spawns, latency histogram, TUI display, turn-boundary abort by @bug-ops in #2892
• fix(skills): normalize :latest suffix in embedding model name comparison by @bug-ops in #2910
• refactor(core): decompose MemoryState and consolidate AgentBuilder (#2897, #2899) by @bug-ops in #2911
• feat(core): introduce Turn domain type and CommandRegistry (#2895, #2896) by @bug-ops in #2912
• refactor(common): introduce ToolName and SessionId newtypes by @bug-ops in #2913
• refactor(core/skills): LoopEvent event handler pattern + zeph-skills dependency decoupling by @bug-ops in #2914
• refactor: type safety cleanup and MemoryFacade trait (#2907, #2903) by @bug-ops in #2915
• refactor(core): extract ContextAssembler as standalone testable struct (#2904) by @bug-ops in #2917
• refactor(core): extract shared provider helpers from bootstrap (#2916) by @bug-ops in #2918
• refactor(core): move bootstrap module from zeph-core to binary crate by @bug-ops in #2919
• refactor(core): extract zeph-context crate from zeph-core monolith (phase 1) by @bug-ops in #2920
• refactor(core,commands,sanitizer): extract zeph-commands scaffold and infrastructure improvements by @bug-ops in #2922
• refactor(commands,core): migrate command handlers to zeph-commands (phase 3) by @bug-ops in #2925
• refactor(commands,core): migrate 8 command handlers to zeph-commands (phase 4) by @bug-ops in #2926
• refactor(commands,core): migrate 3 slash handlers to Send-compatible registry (phase 5, #2928) by @bug-ops in #2934
• fix(bootstrap,channels,core): unused import and CLI image path traversal by @bug-ops in #2938
• fix(core,experiments): path traversal in ImageCommand and rand RUSTSEC-2026-0097 by @bug-ops in #2939
• docs(specs): add BRD, SRS, NFR and fill gaps in spec coverage by @bug-ops in #2940
• refactor(llm,mcp,commands): investigate HRTB blockers for /compact and /mcp migration (#2935, #2936) by @bug-ops in #2941
• fix(commands,mcp): resolve HRTB blockers for /compact and /mcp registry migration by @bug-ops in #2944
• refactor(commands,core): migrate /skill, /skills, /feedback to CommandHandler registry, remove dispatch_slash_command (#2945) by @bug-ops in #2949
• ci: remove sccache from lightweight jobs, expand cargo cache by @bug-ops in #2950
• refactor(commands): remove old channel.send wrappers for /lsp, /scheduler, /experiment, /log (#2946, #2947) by @bug-ops in #2951
• refactor(commands): migrate /plan command family to CommandHandler registry by @bug-ops in #2952
• release: v0.19.0 by @bug-ops in #2953

Full Changelog: v0.18.6...v0.19.0