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Microsoft

FluidFramework — Engineering Performance

32 engineers all time · Jan 2025 – Aug 2026 · built 2026-08-23 · GitHub

Performance snapshot

Today's rolling 90-day reading for FluidFramework, compared with the start of the series. Pick a window to move that comparison point.

Eff. capacity added

+2.9engineers

27 devs deliver like 30 (1.1x pre-AI)

Avg. perf / dev / mo (ETV)

+20.1%

0.79 → 0.95

Active engineers

−10.0%

30.0 → 27.0

Features

+10.3pp

16.1% → 26.4%

FluidFramework vs. Microsoft

Per-engineer ETV for FluidFramework against Microsoft as a whole. Both lines are 90-day rolling averages scaled to a 30-day month, so they share one axis and can be read against each other at any point. Pick a window to zoom the chart to it.

FluidFramework
0.95ETV / dev / mo
+0.16 (+20.3%) past 90d
Microsoft
4.52ETV / dev / mo
+1.48 (+48.7%) past 90d

Performance over time

ETV stacked by Features / Maintenance / Tests / Docs / Fixes — 90-day moving average, normalized to ETV / month.

Engineering capacity

Effective engineers behind FluidFramework, in pre-AI terms. Per-engineer ETV divided by the Q1 2025 baseline of 0.86 ETV / dev / mo gives a capacity multiple, and that multiple applied to the engineers active in the trailing 90 days turns it into engineer-equivalents. The line is the real headcount, so the gap between line and area is what the leverage is worth.

Effective engineers
30engineer-equivalents
+3 engineers above real headcount
Real engineers
27engineers
active in the trailing 90 days
Capacity vs pre-AI
1.1x
per engineer, vs 0.86 ETV / dev / mo

Knowledge concentration

How dependent is this repo on a small number of engineers? Higher top-1 share = higher key-person risk.

Top 1
19.0 %
Top 3
37.4 %
Top 5
49.0 %

Craig Macomber (Microsoft) owns 19.0 % of commits.

Reports

Written summary of the work completed each month.

No monthly reports available yet.

Most impactful commits

Top 10 by ETV in the all-time window.