The closest thing you can get in Github is the Insights → Code frequency chart. It shows lines added and lines deleted aggregated by week. For example:
But you can use command line git to generate a log of changes that you can then process via some scripting language, and generate a result in form of markdown table or even mermaid diagrams.
For example, I used AWK to get git’s output and generate code compatible with mermaid, that then pasted into Obsidian to get this chart (showing only commits since 2025-09-01):
Unfortunately mermaid cannot generate a legend. In this chart the gray bars 
are the number of files renamed per day. Most of the days they are zero, but mermaid puts the base on -1, so a gray bar appears even for zero. Red 
is the number of deleted files, orange 
is the number of edited files and green 
is the number of new files.
The code of the chart is:
```mermaid
---
config:
xyChart:
height: 800
themeVariables:
xyChart:
plotColorPalette: "#84994F, #FCB53B, #B45253, #a7a7a7"
---
xychart-beta horizontal
title "File Activity per Day (Stacked)"
y-axis "Total Files"
x-axis ["2025-09-03", "2025-09-05", "2025-09-08", "2025-09-09", "2025-09-10", "2025-09-11", "2025-09-12", "2025-09-13", "2025-09-14", "2025-09-15", "2025-09-16", "2025-09-17", "2025-09-18", "2025-09-19", "2025-09-20", "2025-09-21", "2025-09-22", "2025-09-23", "2025-09-24", "2025-09-25", "2025-09-26", "2025-09-27", "2025-09-28", "2025-09-29", "2025-09-30", "2025-10-01", "2025-10-02", "2025-10-03", "2025-10-04", "2025-10-06", "2025-10-07", "2025-10-08", "2025-10-09", "2025-10-10", "2025-10-11", "2025-10-12", "2025-10-13", "2025-10-14", "2025-10-16", "2025-10-17", "2025-10-19", "2025-10-20", "2025-10-21"]
bar "Added" [29, 40, 9, 107, 22, 2, 13, 10, 2, 18, 12, 12, 18, 36, 2, 18, 22, 20, 11, 31, 18, 2, 3, 27, 22, 22, 32, 16, 8, 18, 14, 12, 12, 29, 9, 9, 5, 9, 7, 11, 41, 29, 12]
bar "Modified" [25, 25, 6, 102, 19, 2, 11, 9, 2, 16, 9, 10, 15, 31, 2, 15, 18, 16, 9, 25, 15, 2, 3, 22, 12, 18, 23, 13, 7, 14, 11, 11, 12, 15, 6, 9, 4, 7, 5, 11, 30, 27, 11]
bar "Deleted" [5, 6, 2, 72, 5, 1, 3, 3, 1, 9, 4, 2, 5, 9, 1, 6, 5, 2, 2, 7, 8, 1, 2, 9, 3, 4, 7, 3, 3, 4, 2, 3, 5, 5, 1, 1, 1, 1, 1, 4, 7, 13, 1]
bar "Renamed" [1, 3, 0, 63, 1, 0, 2, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 0]
```
and the script that generated that data is the following, It accepts two optional parameters for the start and end dates to show.
#!/bin/bash
# FILE: git_activity.sh
#
# Generates a Mermaid 'xychart-beta' syntax for repository file activity.
# This version simulates STACKED bars by calculating cumulative totals.
#
# USAGE:
# ./git_activity.sh [START_DATE] [END_DATE]
# Get dates from the first two arguments
START_DATE=$1
END_DATE=$2
# --- 1. GIT LOG COMMAND ---
GIT_CMD=("git" "log" "--name-status" "--pretty=format:DATE %ad" "--date=format:%Y-%m-%d")
if [ -n "$START_DATE" ]; then
GIT_CMD+=("--since=$START_DATE")
fi
if [ -n "$END_DATE" ]; then
GIT_CMD+=("--until=$END_DATE")
fi
# Execute the git log command and pipe its output
"${GIT_CMD[@]}" | \
# --- 2. FIRST AWK (Process data into a table) ---
# (This block is unchanged)
awk '
BEGIN {
OFS="\t";
}
/^DATE/ {
current_date=$2;
if (!(current_date in all_dates)) {
all_dates[current_date] = 1;
}
}
/^[AMDRC]/ {
status = substr($1, 1, 1);
if (status == "A" || status == "C") {
added[current_date]++;
} else if (status == "M") {
modified[current_date]++;
} else if (status == "D") {
deleted[current_date]++;
} else if (status == "R") {
renamed[current_date]++;
}
}
END {
# Print table header
# print "Date\tAdded\tMod\tDeleted\tRenamed";
# Print data rows
for (d in all_dates) {
print d, "\t", added[d]+0, "\t", modified[d]+0, "\t", deleted[d]+0, "\t", renamed[d]+0;
}
}' | \
# --- 3. SORT (Order by date) ---
# (This block is unchanged)
sort | \
# --- 4. SECOND AWK (Format for Mermaid with STACKED logic) ---
# (This block is MODIFIED)
awk '
BEGIN {
# Print Mermaid chart header
print "xychart-beta horizontal";
print " title \"File Activity per Day (Stacked)\""; # Updated title
print " y-axis \"Total Files\"";
# Initialize data strings for the stacks
dates = "";
data_total = ""; # Corresponds to "Added" slice
data_mod_del_ren = ""; # Corresponds to "Modified" slice
data_del_ren = ""; # Corresponds to "Deleted" slice
data_ren = ""; # Corresponds to "Renamed" slice
}
# Skip the header row from the previous awk
NR == 1 { next }
# Process each data row
{
# Store values for clarity (and ensure they are numeric)
a = $2+0; # Added
m = $3+0; # Modified
d = $4+0; # Deleted
r = $5+0; # Renamed
# Calculate the cumulative stacks
# These values are what get plotted
val_total = a + m + d + r;
val_mdr = m + d + r;
val_dr = d + r;
val_r = r;
# Build the date string
dates = (dates == "" ? "" : dates ", ") "\"" $1 "\"";
# Build the data strings
data_total = (data_total == "" ? "" : data_total ", ") val_total;
data_mod_del_ren = (data_mod_del_ren == "" ? "" : data_mod_del_ren ", ") val_mdr;
data_del_ren = (data_del_ren == "" ? "" : data_del_ren ", ") val_dr;
data_ren = (data_ren == "" ? "" : data_ren ", ") val_r;
}
END {
# Print all data series for Mermaid
# The order is CRITICAL for stacking: draw the largest first.
# The labels ("Added", "Modified"...) now represent the
# visible "slice" of the stack.
print " x-axis [" dates "]";
print " bar \"Added\" [" data_total "]";
print " bar \"Modified\" [" data_mod_del_ren "]";
print " bar \"Deleted\" [" data_del_ren "]";
print " bar \"Renamed\" [" data_ren "]";
}'
NOTE: as far as I know, mermaid does not stack bars, so I had to “fake” them, by adding up data to generate longer bars “behind” the ones drawn later.
I also have Obsidian Sync running since the around the same time and I expect it to have similar data hidden somewhere
