Git Commit Aider

Make git commits on behalf of AI to track AI contributions in your codebase.

Make git commits on behalf of AI, so that you can track AI contribution in your codebase.

This is a TypeScript-based MCP server that provides a tool to commit staged changes in a Git repository while appending "(aider)" to the committer's name.

commit_staged- Commit staged changes with a specific message.

- Takesmessage(string, required) as the commit message.
- Takescwd(string, optional) to specify the working directory for the git command.
- Appends "(aider)" to the committer name automatically.
- Reads committer name and email from environment variables (GIT_COMMITTER_NAME,GIT_COMMITTER_EMAIL) if set, otherwise falls back togit config user.nameandgit config user.email.

With this tool installed in your code editor, you can prompt the AI by something like:

This usually happens after the AI has made some changes to your codebase, so often times AI is able to provide a good commit message from the context.

To use this server, add its configuration to your MCP settings file.

{ "mcpServers": { "git-commit-aider": { "command": "npx", "args": ["mcp-git-commit-aider"] } } }

The committer information is retrieved from:
- Environment variablesGIT_COMMITTER_NAMEandGIT_COMMITTER_EMAIL, which followsgit's convention.
- Output ofgit config user.nameandgit config user.emailcommands.

git commit --amend --author="$(git config user.name) (aider) <$(git config user.email)>"

git config --global alias.aimend '!git commit --amend --author="$(git config user.name) (aider) <$(git config user.email)>"'

Commits with "(aider)" can be picked up byaider --statscommand, which will show you the contribution of AI in your codebase.

#!/bin/bash # Script to calculate line changes (added, deleted, total) by AI and human authors # between two commits. # Output is in JSON format. # # This logic is extracted and altered from git-quick-stats.sh, MIT license. # --- Configuration --- # You may change the config to match your repository's convention. # String to identify AI-generated commits in author names AI_MATCHER="(aider)" # Define patterns for files/paths to be excluded from the calculation. # These will be converted to git pathspecs like ":(exclude)package-lock.json" IGNORE_PATTERNS=( "package-lock.json" ".lock" ) # --- Helper Functions --- function print_usage() { echo "Usage: $0 <REVISION_RANGE>" echo " <REVISION_RANGE>: The revision range to analyze (e.g., HEAD~5..HEAD, my-branch, commit_sha)." echo " Refer to 'git help log' or 'git help revisions' for more range options." echo "Example: $0 HEAD~5..HEAD" echo "Example: $0 origin..HEAD" echo "Example: $0 my-feature-branch" echo "Example: $0 abcdef1..fedcba2" } # --- Argument Parsing --- if [ "$#" -ne 1 ]; then echo "Error: Incorrect number of arguments. Please provide a single revision range." print_usage exit 1 fi REVISION_RANGE="$1" # --- Main Logic --- # Construct pathspec arguments for git log pathspec_args=() for pattern in "${IGNORE_PATTERNS[@]}"; do pathspec_args+=(":(exclude)$pattern") done git_log_output=$(git log "$REVISION_RANGE" --numstat --pretty="format:AuthorName:%an" -- "${pathspec_args[@]}") # DEBUG: Uncomment to check the calculation for each commit. # echo "$git_log_output" # Process the log output with awk result_json=$(echo "$git_log_output" | awk -v ai_matcher="$AI_MATCHER" ' BEGIN { ai_added = 0 ai_deleted = 0 human_added = 0 human_deleted = 0 current_author = "" is_ai_author = 0 } /^AuthorName:/ { # Extract author name current_author = substr($0, length("AuthorName:") + 1) if (index(current_author, ai_matcher) > 0) { is_ai_author = 1 } else { is_ai_author = 0 } next } # Skip empty lines between commit blocks or lines that are not numstat NF == 0 || !($1 ~ /^[0-9]+$/ && $2 ~ /^[0-9]+$/) { next } # Process numstat line: <added> <deleted> <file> { added_lines = $1 deleted_lines = $2 # Skip binary files where numstat shows "-" for lines if (added_lines == "-" || deleted_lines == "-") { next } # Aggregate stats per author and file for details array file_name = $3 # Robust key using File Separator character \034 key = current_author "\034" file_name file_author_added[key] += added_lines file_author_deleted[key] += deleted_lines if (is_ai_author) { ai_added += added_lines ai_deleted += deleted_lines } else { human_added += added_lines human_deleted += deleted_lines } } END { ai_total_changed = ai_added + ai_deleted human_total_changed = human_added + human_deleted overall_total_changed = ai_total_changed + human_total_changed ai_percentage = 0.00 if (overall_total_changed > 0) { ai_percentage = (ai_total_changed / overall_total_changed)  100 } printf "{\n" printf " \"ai_percentage\": %.2f,\n", ai_percentage printf " \"ai_changes\": {\"added\": %d, \"deleted\": %d, \"total\": %d},\n", ai_added, ai_deleted, ai_total_changed printf " \"human_changes\": {\"added\": %d, \"deleted\": %d, \"total\": %d},\n", human_added, human_deleted, human_total_changed # Details array printf " \"details\": [\n" first_detail = 1 # Iterate over one of the arrays, keys should be consistent for (key in file_author_added) { if (!first_detail) { printf ",\n" } first_detail = 0 # Split key "author\034fileName" into key_parts array # key_parts[1] will be author, key_parts[2] will be fileName split(key, key_parts, "\034") author = key_parts[1] fileName = key_parts[2] # Escape double quotes for JSON compatibility gsub(/"/, "\\\"", author) gsub(/"/, "\\\"", fileName) detail_added = file_author_added[key] + 0 # Ensure numeric detail_deleted = file_author_deleted[key] + 0 # Ensure numeric detail_total = detail_added + detail_deleted printf " {\n" printf " \"fileName\": \"%s\",\n", fileName printf " \"author\": \"%s\", \"isAI\": %s,\n", author, (index(author, ai_matcher) > 0 ? "true" : "false") printf " \"added\": %d, \"deleted\": %d, \"total\": %d\n", detail_added, detail_deleted, detail_total printf " }" } printf "\n ]\n" printf "}\n" } ') # --- Output --- echo "$result_json"

# Assume the script is saved as calculate_ai_contribution.sh and is executable (chmod +x calculate_ai_contribution.sh) # Example 1: Analyze the last 5 commits ./calculate_ai_contribution.sh HEAD~5..HEAD # Example 2: Analyze commits between a specific commit and HEAD ./calculate_ai_contribution.sh 90a5fcd4..HEAD # Example 3: Analyze all commits on a feature branch not yet in main ./calculate_ai_contribution.sh main..my-feature-branch # Example 4: Analyze commits between two tags ./calculate_ai_contribution.sh v1.0..v1.1 # Example output (will vary based on your repository and range): # { # "ai_percentage": 48.53, # "ai_changes": { "added": 100, "deleted": 32, "total": 132 }, # "human_changes": { "added": 103, "deleted": 37, "total": 140 }, # "details": [ # { # "fileName": "src/featureA.js", # "author": "Developer One (aider)", "isAI": true, # "added": 60, "deleted": 10, "total": 70 # }, # { # "fileName": "src/featureB.js", # "author": "Developer One (aider)", "isAI": true, # "added": 40, "deleted": 22, "total": 62 # }, # { # "fileName": "src/utils.js", # "author": "Developer Two", "isAI": false, # "added": 80, "deleted": 15, "total": 95 # }, # { # "fileName": "README.md", # "author": "Developer Two", "isAI": false, # "added": 23, "deleted": 22, "total": 45 # } # ] # }

The JSON output contains the following fields:

- ai_percentage: (Number) The percentage of total lines changed (sum of added and deleted lines) that were contributed by AI authors (identified byAI_MATCHER).
- ai_changes: (Object) An object detailing the aggregated line changes (linesadded,deleted, and theirtotal) made by AI authors.
- human_changes: (Object) An object detailing the aggregated line changes (linesadded,deleted, and theirtotal) made by human authors.
- details: (Array of Objects) Provides a detailed breakdown of changes. Each object in the array represents the contribution of a specificauthorto a particularfileName, including linesadded,deleted, and thetotalchanges for that file by that author.

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