# Changelog

## v0.3.0

### Research / simulator

- added prefill/decode disaggregation with independent accelerator profiles and worker counts
- added a genuine event-driven P/D pipeline with overlapping prefill, transfer, and decode activity
- added explicit serialized KV-transfer modeling with bandwidth/base-latency controls
- added P/D telemetry: role utilization, transfer volume, mean/p95 transfer latency, and transfer utilization
- added P/D-specific bottleneck diagnoses for prefill-pool, decode-pool, and KV-transfer pressure
- added deterministic shared-prefix reuse with independent cache RNG so enabling cache preserves the workload trace
- added shared-prefix KV accounting and saved-prefill-token telemetry
- added four-way colocated/P-D x cache-off/on comparison
- added bounded design-space exploration and goodput/p95-TTFT Pareto-frontier marking

### UI / usability

- removed the product-style footer
- simplified top branding toward a research-prototype presentation
- added explicit Worst repetition and Target columns to Capacity Planner tables/exports
- removed area fill from the capacity line chart
- changed line-chart legends to line swatches rather than rectangle blocks
- added PNG download controls to every chart
- added meaningful experiment-aware PNG filenames instead of generic chart names
- retained full-screen chart expansion and Escape-to-close behavior
- added Modern Serving and Design Explorer sections
- added live topology, shared-prefix, P/D worker, and interconnect controls to Serving Lab

### Validation

- expanded tests to 17 deterministic cases
- release check now validates P/D transfer telemetry, design-space output, PNG controls, planner evidence columns, UI ASCII safety, and absence of the old footer

## v0.2.0

- auto-hide runtime header after Pyodide becomes ready; hover/focus at the top edge reveals it
- redesigned the interface around a flatter engineering-dashboard visual system
- replaced decorative/non-ASCII ranking glyphs with explicit text labels
- added chart expansion with Escape-to-close support
- added copy-to-clipboard and CSV export for Scheduler Arena and Capacity Planner tables
- added JSON copy alongside download for individual simulations
- exposed burst multiplier and burst-period controls
- added component TTFT/E2E SLO-attainment accounting and failure breakdowns
- added heuristic simulator-side bottleneck diagnosis with evidence and next-step guidance
- made capacity feasibility conservative across repetitions: every repetition must meet the target and fully drain
- added minimum/mean/maximum repetition evidence to capacity traces
- changed the capacity plot to a true linear request-rate x-axis and added worst-repetition evidence

## v0.1.0

Initial browser-native Python release with workload generation, static/continuous scheduling, chunked prefill, KV-cache accounting, analytical latency profiles, Scheduler Arena, and SLO capacity search.