1

Change-V5.5.0:-Hook-Efficiency-Quick-Wins-(Sprint-8-Implementation)

Leo Miranda edited this page 2026-01-30 18:21:50 +00:00

Table of Contents

• Change V5.5.0: Hook Efficiency Quick Wins
• Scope
• In Scope
• Explicitly Out of Scope
• Implementation Details
• 1. Remove viz-platform SessionStart Hook
• 2. Add Early Git Check to git-flow Hooks
• 3. Add Cooldown to project-hygiene
• Verification
• Results
• Lessons Learned
• References

Change V5.5.0: Hook Efficiency Quick Wins

Sprint: 8
Status: ✅ Implemented
Date: 2026-01-30
Origin: RFC-Hook-Efficiency-Improvements

---

Scope

This sprint implements Phase 1: Quick Wins from the RFC, focusing on low-effort, high-impact optimizations.

In Scope

Change	Plugin	Impact
Remove SessionStart hook	viz-platform	Eliminates pointless echo
Add early git check	git-flow	Skips 90%+ of Bash invocations
Add cooldown	project-hygiene	Reduces find operations

Explicitly Out of Scope

• SessionStart dispatcher consolidation (rejected - fights plugin architecture)
• Shared hook library (rejected - creates coupling)
• clarity-assist opt-in (deferred - requires user discussion)
• Path filtering for PostToolUse hooks (deferred - case-by-case)

---

Implementation Details

1. Remove viz-platform SessionStart Hook

File: plugins/viz-platform/hooks/hooks.json

Before:

{
  "hooks": [
    {
      "event": "SessionStart",
      "type": "command",
      "command": "echo 'viz-platform plugin loaded'",
      "timeout": 5000
    }
  ]
}

After:

{
  "hooks": []
}

2. Add Early Git Check to git-flow Hooks

Problem: commit-msg-check.sh spawns Python to parse JSON even for non-git commands.

Solution: Add early check before JSON parsing:

# Quick check - exit immediately if not a git command
if ! echo "$INPUT" | grep -q '"command".*git'; then
    exit 0
fi

Files:

• plugins/git-flow/hooks/branch-check.sh
• plugins/git-flow/hooks/commit-msg-check.sh

3. Add Cooldown to project-hygiene

Problem: Runs find across entire project on every file edit.

Solution: Add session-based cooldown (skip if ran recently):

LAST_RUN_FILE="/tmp/project-hygiene-${PPID}-last-run"
if [[ -f "$LAST_RUN_FILE" ]]; then
    LAST_RUN=$(cat "$LAST_RUN_FILE")
    NOW=$(date +%s)
    if (( NOW - LAST_RUN < 60 )); then
        exit 0  # Skip if ran in last 60 seconds
    fi
fi
date +%s > "$LAST_RUN_FILE"

---

Verification

✅ All implemented and tested:

1. New session starts without viz-platform echo
2. Non-git bash commands skip hook processing
3. Git branch validation still works
4. Git commit message validation still works
5. Cleanup runs once per minute max, not every edit

---

Results

Issue	Status	PR
#321 - Remove viz-platform hook	✅ Closed	#334
#322 - Early git check (branch)	✅ Closed	#334
#323 - Early git check (commit-msg)	✅ Closed	#334
#324 - Cooldown (cleanup)	✅ Closed	#334

---

Lessons Learned

• Sprint 8 - Parallel Hook Optimization Success

---

References

• RFC: Hook Efficiency Improvements
• Previous analysis identified 16 hooks across 12 plugins