---

name: preflight description: Environment validation checklist. Run this FIRST when starting a new Claude session to verify the environment is ready for optimization work. Checks build tools, test runners, benchstat, git, and database access.

Pre-flight Checklist

Run this skill FIRST when starting a new session.

This validates that the environment is properly configured for optimization hunting, reviewing, and rescuing.

---

Execute All Checks

Run each check in order. STOP on any failure and report the issue.

1. Build Tools

Copyecho "=== Check 1: Build Tools ==="
dda --version

Expected: Version string like dda version X.Y.Z If fails: Not in dev container, or dda not in PATH

Copygo version

Expected: go version go1.2X.X linux/amd64 If fails: Go not installed or not in PATH

---

2. Can Build Code

Copyecho "=== Check 2: Build Test ==="
go build ./pkg/metrics/...

Expected: No output (success) If fails: Run go mod download, check modules.yml

---

3. Can Run Tests

Copyecho "=== Check 3: Test Runner ==="
go test -short -count=1 ./pkg/aggregator/ckey/... 2>&1

Expected: ok lines for each package If fails: Check test dependencies

Note: Use pkg/aggregator/ckey for preflight - it has minimal dependencies. Some packages (like pkg/metrics) may fail due to config assertions in test setup.

---

4. Benchstat Available

Copyecho "=== Check 4: Benchstat ==="
which benchstat || (echo "Installing benchstat..." && go install golang.org/x/perf/cmd/benchstat@latest)
benchstat --help 2>&1 | head -1

Expected: Usage information If fails: go install golang.org/x/perf/cmd/benchstat@latest

---

5. Git Configured

Copyecho "=== Check 5: Git ==="
git status | head -3
git config user.name
git config user.email

Expected: Branch info, name, and email If fails: Configure with git config user.name "Name" and git config user.email "email"

---

6. Skills Databases Writable

Copyecho "=== Check 6: Database Access ==="
SKILLS=".claude/skills"
touch "$SKILLS/hunt-optimization/hunts.yaml" && echo "✓ hunts.yaml writable"
touch "$SKILLS/review-optimization/reviews.yaml" && echo "✓ reviews.yaml writable"
touch "$SKILLS/rescue-optimization/rescues.yaml" && echo "✓ rescues.yaml writable"
touch "$SKILLS/validate-correctness/validations.yaml" && echo "✓ validations.yaml writable"

Expected: All 4 databases writable If fails: Check permissions, may need chmod 644 or ownership fix

---

7. Skills Readable

Copyecho "=== Check 7: Skills Present ==="
head -2 .claude/skills/hunt-optimization/SKILL.md | grep -q "^name:" && echo "✓ hunt-optimization"
head -2 .claude/skills/review-optimization/SKILL.md | grep -q "^name:" && echo "✓ review-optimization"
head -2 .claude/skills/rescue-optimization/SKILL.md | grep -q "^name:" && echo "✓ rescue-optimization"
head -2 .claude/skills/validate-correctness/SKILL.md | grep -q "^name:" && echo "✓ validate-correctness"

Expected: All 4 skills present If fails: Skills not mounted/installed correctly

---

Quick All-in-One Check

Copy#!/bin/bash
set -e  # Exit on ANY error

echo "=== PREFLIGHT START ==="

echo "Check 1: dda..."
dda --version > /dev/null

echo "Check 2: go..."
go version > /dev/null

echo "Check 3: build..."
go build ./pkg/aggregator/ckey/...

echo "Check 4: test..."
go test -short -count=1 ./pkg/aggregator/ckey/... > /dev/null

echo "Check 5: benchstat..."
which benchstat > /dev/null

echo "Check 6: git..."
git config user.name > /dev/null
git config user.email > /dev/null

echo "Check 7: databases writable..."
touch .claude/skills/hunt-optimization/hunts.yaml
touch .claude/skills/review-optimization/reviews.yaml
touch .claude/skills/rescue-optimization/rescues.yaml
touch .claude/skills/validate-correctness/validations.yaml

echo "Check 8: skills readable..."
head -1 .claude/skills/hunt-optimization/SKILL.md > /dev/null
head -1 .claude/skills/review-optimization/SKILL.md > /dev/null
head -1 .claude/skills/rescue-optimization/SKILL.md > /dev/null
head -1 .claude/skills/validate-correctness/SKILL.md > /dev/null
head -1 .claude/skills/preflight/SKILL.md > /dev/null

echo "=== PREFLIGHT PASSED ==="

CRITICAL: The set -e ensures the script exits immediately on ANY failure. If you see output stop before "PREFLIGHT PASSED", a check failed.

---

Report Format

After running checks, output:

CopyPREFLIGHT REPORT
================
Timestamp: <current time>
Status: PASS | FAIL

Checks:
  [✓] dda --version
  [✓] go version
  [✓] go build
  [✓] go test
  [✓] benchstat
  [✓] git config
  [✓] databases writable
  [✓] skills readable

Ready for: /hunt-optimization, /review-optimization, /rescue-optimization

Or if failed:

CopyPREFLIGHT REPORT
================
Status: FAIL

Failed checks:
  [✗] benchstat - not found
      Fix: go install golang.org/x/perf/cmd/benchstat@latest

  [✗] databases writable - permission denied
      Fix: Check .claude/skills mount permissions

DO NOT proceed with optimization skills until all checks pass.

---

Usage

Copy/preflight                    # Run full checklist

Run this at the start of every new Claude session before any optimization work.