code-diary.sh

#!/bin/bash
# code-diary.sh — Claude Code PostToolUse hook
# Creates a completed Reminder in the "Code" list for git commits and PRs.
# Uses reminders-cli (EventKit) — no AppleScript, works headless.

# Ensure Homebrew binaries are available (reminders-cli, jq, etc.)
export PATH="/opt/homebrew/bin:$PATH"

# Never let this hook block Claude — any error exits cleanly
trap 'exit 0' ERR

# Read JSON from stdin
INPUT=$(cat)

# Quick bail if not a Bash tool call
TOOL_NAME=$(echo "$INPUT" | jq -r '.tool_name // ""' 2>/dev/null) || exit 0
[ "$TOOL_NAME" = "Bash" ] || exit 0

# Extract command and working directory
COMMAND=$(echo "$INPUT" | jq -r '.tool_input.command // ""' 2>/dev/null) || exit 0
CWD=$(echo "$INPUT" | jq -r '.cwd // ""' 2>/dev/null) || exit 0

# Quick bail if not a git/gh operation we care about
echo "$COMMAND" | grep -qE 'git commit|git push|gh pr create|gh pr merge' || exit 0

# Extract tool response — Bash tool returns {"stdout": "...", "stderr": "..."}
RESPONSE=$(echo "$INPUT" | jq -r '
  if .tool_response | type == "string" then .tool_response
  elif .tool_response | type == "object" then (.tool_response.stdout // (.tool_response | tostring))
  else ""
  end
' 2>/dev/null) || RESPONSE=""

# Determine project name: prefer git remote, fall back to directory name
PROJECT=$(git -C "$CWD" remote get-url origin 2>/dev/null | sed 's|.*/||;s|\.git$||') || PROJECT=""
[ -z "$PROJECT" ] && PROJECT=$(basename "$CWD")

# Get current branch
BRANCH=$(git -C "$CWD" rev-parse --abbrev-ref HEAD 2>/dev/null) || BRANCH="unknown"

# Get GitHub repo URL for linking
REPO_URL=$(git -C "$CWD" remote get-url origin 2>/dev/null | sed 's|git@github\.com:|https://github.com/|;s|\.git$||') || REPO_URL=""

TITLE=""
NOTES=""
TIMESTAMP=$(date "+%Y-%m-%d %H:%M")

# --- Detect: gh pr create ---
if echo "$COMMAND" | grep -qE 'gh pr create'; then
    PR_URL=$(echo "$RESPONSE" | grep -oE 'https://github\.com/[^ ]+' | head -1) || PR_URL=""
    # Extract PR title from --title "..." or --title '...'
    PR_TITLE=$(echo "$COMMAND" | sed -n 's/.*--title[= ]*"\([^"]*\)".*/\1/p' | head -1) || PR_TITLE=""
    [ -z "$PR_TITLE" ] && PR_TITLE=$(echo "$COMMAND" | sed -n "s/.*--title[= ]*'\([^']*\)'.*/\1/p" | head -1) || true

    TITLE="${PROJECT} - PR Created"
    NOTES="Branch: ${BRANCH}"
    [ -n "$PR_TITLE" ] && NOTES="${NOTES}
Title: ${PR_TITLE}"
    [ -n "$PR_URL" ] && NOTES="${NOTES}

${PR_URL}"
    NOTES="${NOTES}

${TIMESTAMP}"

# --- Detect: gh pr merge ---
elif echo "$COMMAND" | grep -qE 'gh pr merge'; then
    PR_NUM=$(echo "$COMMAND" | grep -oE '#?[0-9]+' | grep -oE '[0-9]+' | head -1) || PR_NUM=""
    MERGE_MSG=$(echo "$RESPONSE" | grep -E '(Merged|merged)' | head -1) || MERGE_MSG=""

    TITLE="${PROJECT} - PR Merged"
    NOTES="Branch: ${BRANCH}"
    [ -n "$PR_NUM" ] && NOTES="${NOTES}
PR #${PR_NUM}"
    [ -n "$MERGE_MSG" ] && NOTES="${NOTES}
${MERGE_MSG}"
    [ -n "$REPO_URL" ] && NOTES="${NOTES}

${REPO_URL}"
    NOTES="${NOTES}

${TIMESTAMP}"

# --- Detect: git push ---
elif echo "$COMMAND" | grep -qE 'git push'; then
    PUSH_DEST=$(echo "$RESPONSE" | grep -oE '[a-z]+/[^ ]+\.\.[^ ]+' | head -1) || PUSH_DEST=""
    PUSH_SUMMARY=$(echo "$RESPONSE" | grep -E '(->|To )' | head -1 | sed 's/^ *//') || PUSH_SUMMARY=""

    TITLE="${PROJECT} - Push"
    NOTES="Branch: ${BRANCH}"
    [ -n "$PUSH_SUMMARY" ] && NOTES="${NOTES}
${PUSH_SUMMARY}"
    [ -n "$REPO_URL" ] && NOTES="${NOTES}

${REPO_URL}"
    NOTES="${NOTES}

${TIMESTAMP}"

# --- Detect: git commit ---
elif echo "$COMMAND" | grep -qE 'git commit'; then
    # Extract from response: "[branch hash] commit message"
    COMMIT_LINE=$(echo "$RESPONSE" | grep -E '^\[' | head -1) || COMMIT_LINE=""
    COMMIT_MSG=$(echo "$COMMIT_LINE" | sed 's/^\[[^]]*\] //') || COMMIT_MSG=""
    COMMIT_HASH=$(echo "$COMMIT_LINE" | sed -n 's/^\[[^ ]* \([a-f0-9]*\)\].*/\1/p') || COMMIT_HASH=""
    FILE_STATS=$(echo "$RESPONSE" | grep -E '[0-9]+ files? changed' | head -1 | sed 's/^ *//') || FILE_STATS=""

    TITLE="${PROJECT} - Commit"
    NOTES="Branch: ${BRANCH}"
    [ -n "$COMMIT_HASH" ] && NOTES="${NOTES}
Hash: ${COMMIT_HASH}"
    [ -n "$COMMIT_MSG" ] && NOTES="${NOTES}

${COMMIT_MSG}"
    [ -n "$FILE_STATS" ] && NOTES="${NOTES}
${FILE_STATS}"
    [ -n "$REPO_URL" ] && NOTES="${NOTES}

${REPO_URL}"
    NOTES="${NOTES}

${TIMESTAMP}"
fi

# Create the reminder and mark it completed using its externalId
if [ -n "$TITLE" ]; then
    ADD_JSON=$(reminders add "Code" "$TITLE" --notes "$NOTES" --format json 2>/dev/null) || exit 0
    EXT_ID=$(echo "$ADD_JSON" | jq -r '.externalId // ""' 2>/dev/null) || exit 0
    if [ -n "$EXT_ID" ] && [ "$EXT_ID" != "null" ]; then
        reminders complete "Code" "$EXT_ID" 2>/dev/null || true
    fi
fi

exit 0