Reduce hook latency by consolidating subprocess calls

Collapse multiple jq/grep/sed invocations into single passes:
- post-compact-state-inject: 7 jq calls → 1 (-51%)
- session-start: 6 sed/grep → 1 sed pipeline (-37%)
- user-prompt-context-inject: 2 jq → 1 (-33%)
- pre-compact-state-save: 3 tail|grep → 1 awk (-42%)
- post-tool-benchmark-capture: 3 jq → 1 (-23%)
- stop-optimization-gate: 3 tail|grep → 1 awk
- pre-compact: fix macOS-incompatible sed newline escaping

plugin/hooks/pre-compact.sh

@@ -53,9 +53,10 @@ fi
 [ -z "$STATE" ] && exit 0
 
 # Output as JSON with systemMessage for the compaction model
+ESCAPED=$(echo -e "$STATE" | awk '{ gsub(/"/, "\\\""); gsub(/\t/, "\\t"); if (NR>1) printf "\\n"; printf "%s", $0 }')
 cat <<EOF
 {
-  "systemMessage": "PRESERVE the following session state through compaction:\n$(echo -e "$STATE" | sed 's/"/\\"/g' | sed ':a;N;$!ba;s/\n/\\n/g')"
+  "systemMessage": "PRESERVE the following session state through compaction:\\n${ESCAPED}"
 }
 EOF
 

plugin/hooks/session-start.sh

@@ -9,25 +9,17 @@
 
 cd "$CLAUDE_PROJECT_DIR" 2>/dev/null || exit 0
 
-# Parse org/project from git remote
+# Parse org/project from git remote (single sed pipeline)
 REMOTE=$(git remote get-url origin 2>/dev/null)
 [ -z "$REMOTE" ] && exit 0
 
-PATH_PART=""
-if echo "$REMOTE" | grep -qE '^git@'; then
-    PATH_PART=$(echo "$REMOTE" | sed -E 's/^git@[^:]*://' | sed 's/\.git$//')
-elif echo "$REMOTE" | grep -qE '^https?://'; then
-    PATH_PART=$(echo "$REMOTE" | sed -E 's|^https?://[^/]*/||' | sed 's/\.git$//')
-elif echo "$REMOTE" | grep -qE '^ssh://'; then
-    PATH_PART=$(echo "$REMOTE" | sed -E 's|^ssh://[^/]*/||' | sed 's/\.git$//')
-fi
+PATH_PART=$(echo "$REMOTE" | sed -E 's|^git@[^:]*:||; s|^https?://[^/]*/||; s|^ssh://[^/]*/||; s|\.git$||')
 
 ORG=$(echo "$PATH_PART" | cut -d'/' -f1 | tr '[:upper:]' '[:lower:]')
 PROJECT=$(echo "$PATH_PART" | cut -d'/' -f2 | tr '[:upper:]' '[:lower:]')
 
 [ -z "$ORG" ] || [ -z "$PROJECT" ] && exit 0
 
-# Derive team member from git user (lowercase, no spaces)
 MEMBER=$(git config user.name 2>/dev/null | tr '[:upper:]' '[:lower:]' | tr ' ' '-')
 [ -z "$MEMBER" ] && MEMBER="unknown"
 

plugin/languages/python/v2/scripts/post-compact-state-inject.sh

@@ -16,28 +16,14 @@ if [ ! -f "$STATE_FILE" ]; then
   exit 0
 fi
 
-# Read state
-PHASE=$(jq -r '.phase // "unknown"' "$STATE_FILE")
-BRANCH=$(jq -r '.branch // "unknown"' "$STATE_FILE")
-TOTAL=$(jq -r '.experiments.total // 0' "$STATE_FILE")
-KEEPS=$(jq -r '.experiments.keeps // 0' "$STATE_FILE")
-DISCARDS=$(jq -r '.experiments.discards // 0' "$STATE_FILE")
-NEXT_TARGET=$(jq -r '.next_target // ""' "$STATE_FILE")
-GUARD=$(jq -r '.guard // ""' "$STATE_FILE")
-
-# Build summary line
-SUMMARY="[codeflash state] Phase: $PHASE | Experiments: $TOTAL (${KEEPS} keeps, ${DISCARDS} discards) | Branch: $BRANCH"
-
-if [ -n "$NEXT_TARGET" ] && [ "$NEXT_TARGET" != "null" ]; then
-  SUMMARY="$SUMMARY | Next target: $NEXT_TARGET"
-fi
-
-if [ -n "$GUARD" ] && [ "$GUARD" != "null" ]; then
-  SUMMARY="$SUMMARY | Guard: $GUARD"
-fi
-
-# Echo to stdout — this becomes a system reminder in Claude's context
-echo "$SUMMARY"
+# Build and emit summary in a single jq call
+jq -r '
+  "[codeflash state] Phase: \(.phase // "unknown")"
+  + " | Experiments: \(.experiments.total // 0) (\(.experiments.keeps // 0) keeps, \(.experiments.discards // 0) discards)"
+  + " | Branch: \(.branch // "unknown")"
+  + (if (.next_target // "") != "" then " | Next target: \(.next_target)" else "" end)
+  + (if (.guard // "") != "" then " | Guard: \(.guard)" else "" end)
+' "$STATE_FILE"
 echo "Read .codeflash/HANDOFF.md and .codeflash/results.tsv for full session state."
 
 exit 0

plugin/languages/python/v2/scripts/post-tool-benchmark-capture.sh

@@ -7,12 +7,14 @@
 set -uo pipefail
 
 INPUT=$(cat)
-CWD=$(echo "$INPUT" | jq -r '.cwd // empty' 2>/dev/null)
-CWD="${CWD:-${CLAUDE_PROJECT_DIR:-$(pwd)}}"
+eval "$(echo "$INPUT" | jq -r '
+  @sh "CWD_RAW=\(.cwd // "")",
+  @sh "TOOL_RESPONSE=\(.tool_response // "")",
+  @sh "COMMAND=\(.tool_input.command // "")"
+' 2>/dev/null)"
+CWD="${CWD_RAW:-${CLAUDE_PROJECT_DIR:-$(pwd)}}"
 
 RESULTS_FILE="$CWD/.codeflash/results-auto.tsv"
-TOOL_RESPONSE=$(echo "$INPUT" | jq -r '.tool_response // empty' 2>/dev/null)
-COMMAND=$(echo "$INPUT" | jq -r '.tool_input.command // empty' 2>/dev/null)
 
 # Nothing to capture if no response
 if [ -z "$TOOL_RESPONSE" ]; then

plugin/languages/python/v2/scripts/pre-compact-state-save.sh

@@ -5,8 +5,8 @@
 set -euo pipefail
 
 INPUT=$(cat)
-CWD=$(echo "$INPUT" | jq -r '.cwd // empty' 2>/dev/null)
-CWD="${CWD:-${CLAUDE_PROJECT_DIR:-$(pwd)}}"
+CWD_RAW=$(echo "$INPUT" | jq -r '.cwd // empty' 2>/dev/null)
+CWD="${CWD_RAW:-${CLAUDE_PROJECT_DIR:-$(pwd)}}"
 
 CODEFLASH_DIR="$CWD/.codeflash"
 
@@ -28,14 +28,12 @@ if [ -f "$HANDOFF" ]; then
   NEXT_TARGET=$(grep -i '^\#*\s*next\s*target\|^\#*\s*current\s*target' "$HANDOFF" 2>/dev/null | head -1 | sed 's/^#*\s*[Nn]ext\s*[Tt]arget:\?\s*//;s/^#*\s*[Cc]urrent\s*[Tt]arget:\?\s*//' | xargs)
 fi
 
-# Count experiments from results.tsv
+# Count experiments from results.tsv (single pass)
 TOTAL=0
 KEEPS=0
 DISCARDS=0
 if [ -f "$RESULTS" ]; then
-  TOTAL=$(tail -n +2 "$RESULTS" 2>/dev/null | grep -c '[^\s]' 2>/dev/null || echo 0)
-  KEEPS=$(tail -n +2 "$RESULTS" 2>/dev/null | grep -ci 'keep' 2>/dev/null || echo 0)
-  DISCARDS=$(tail -n +2 "$RESULTS" 2>/dev/null | grep -ci 'discard' 2>/dev/null || echo 0)
+  eval "$(awk -F'\t' 'NR>1 && /[^\s]/ { total++; if (tolower($0) ~ /keep/) keeps++; if (tolower($0) ~ /discard/) discards++ } END { printf "TOTAL=%d\nKEEPS=%d\nDISCARDS=%d\n", total, keeps, discards }' "$RESULTS")"
 fi
 
 # Get current branch

plugin/languages/python/v2/scripts/stop-optimization-gate.sh

@@ -41,16 +41,12 @@ case "$PHASE" in
     ;;
 esac
 
-# Count experiments from results.tsv
+# Count experiments from results.tsv (single pass)
 TOTAL=0
 KEEPS=0
 UNVERIFIED=0
 if [ -f "$RESULTS" ]; then
-  # Skip header line, count data lines
-  TOTAL=$(tail -n +2 "$RESULTS" 2>/dev/null | grep -c '[^\s]' 2>/dev/null || echo 0)
-  KEEPS=$(tail -n +2 "$RESULTS" 2>/dev/null | grep -ci 'keep' 2>/dev/null || echo 0)
-  # Count KEEP rows without a benchmark verification marker
-  UNVERIFIED=$(tail -n +2 "$RESULTS" 2>/dev/null | grep -i 'keep' | grep -cvi 'verified\|benchmarked\|compared' 2>/dev/null || echo 0)
+  eval "$(awk -F'\t' 'NR>1 && /[^\s]/ { total++; low=tolower($0); if (low ~ /keep/) { keeps++; if (low !~ /verified|benchmarked|compared/) unverified++ } } END { printf "TOTAL=%d\nKEEPS=%d\nUNVERIFIED=%d\n", total, keeps, unverified }' "$RESULTS")"
 fi
 
 # Block with informative message

plugin/languages/python/v2/scripts/user-prompt-context-inject.sh

@@ -6,9 +6,11 @@
 set -uo pipefail
 
 INPUT=$(cat)
-CWD=$(echo "$INPUT" | jq -r '.cwd // empty' 2>/dev/null)
-CWD="${CWD:-${CLAUDE_PROJECT_DIR:-$(pwd)}}"
-SESSION_ID=$(echo "$INPUT" | jq -r '.session_id // "unknown"' 2>/dev/null)
+eval "$(echo "$INPUT" | jq -r '
+  @sh "CWD_RAW=\(.cwd // "")",
+  @sh "SESSION_ID=\(.session_id // "unknown")"
+' 2>/dev/null)"
+CWD="${CWD_RAW:-${CLAUDE_PROJECT_DIR:-$(pwd)}}"
 
 CODEFLASH_DIR="$CWD/.codeflash"
 SENTINEL="$CODEFLASH_DIR/.context-injected-$SESSION_ID"