Frontend Track — Progress

Track: Frontend Principal Engineering (frontend-principal-engineering.md). The PROGRESS.md at the repo root tracks the other track (browser-framework-internals.md). They run independently; this file never claims progress on that one. Cross-track hooks are listed in curriculum-map.md §2.

Current phase: 1 — Platform Substrate Current module: fe-07 — Networking (next). fe-01–fe-06 built and measured. Status: in progress — concept + mechanics verified empirically; lab strategies measured (see measured-results.md). Outstanding: learner-run failure lab (F1–F3) + Principal Review questions.

See curriculum-map.md for the full map, dependency graph and phase plan. See learning-log.md for struggles, open questions, source readings and the revisit queue. See decisions/ for ADRs written during the program.

Status values: todo · in progress · lab done · complete · revisit

Phase 1 — Platform Substrate (Foundation → Senior)

Gate 1→2: predict execution order + rendering timing of unfamiliar async code unaided · find a leak from a heap-snapshot diff · read a waterfall and name the bottleneck class.

Phase 2 — Framework Mechanics (Senior)

Phase 3 — Architecture & Data (Senior → Staff)

Phase 4 — Quality Attributes (Staff)

Phase 5 — Quality Engineering (Staff)

Phase 6 — Platform & Delivery (Staff → Principal)

Phase 7 — Principal Judgment (Principal → Distinguished)

Failure case studies