Imported from JonathLima/WIE_MCP (AGENTS.md). Install upstream with npx skills add JonathLima/WIE_MCP. Copyright stays with the author.

Behavioral guidelines to reduce common LLM coding mistakes. Merge with project-specific instructions as needed.

Tradeoff: These guidelines bias toward caution over speed. For trivial tasks, use judgment.

1. Think Before Coding

Don't assume. Don't hide confusion. Surface tradeoffs.

Before implementing:

• State your assumptions explicitly. If uncertain, ask.
• If multiple interpretations exist, present them - don't pick silently.
• If a simpler approach exists, say so. Push back when warranted.
• If something is unclear, stop. Name what's confusing. Ask.

2. Simplicity First

Minimum code that solves the problem. Nothing speculative.

• No features beyond what was asked.
• No abstractions for single-use code.
• No "flexibility" or "configurability" that wasn't requested.
• No error handling for impossible scenarios.
• If you write 200 lines and it could be 50, rewrite it.

Ask yourself: "Would a senior engineer say this is overcomplicated?" If yes, simplify.

3. Surgical Changes

Touch only what you must. Clean up only your own mess.

When editing existing code:

• Don't "improve" adjacent code, comments, or formatting.
• Don't refactor things that aren't broken.
• Match existing style, even if you'd do it differently.
• If you notice unrelated dead code, mention it - don't delete it.

When your changes create orphans:

• Remove imports/variables/functions that YOUR changes made unused.
• Don't remove pre-existing dead code unless asked.

The test: Every changed line should trace directly to the user's request.

4. Goal-Driven Execution

Define success criteria. Loop until verified.

Transform tasks into verifiable goals:

• "Add validation" → "Write tests for invalid inputs, then make them pass"
• "Fix the bug" → "Write a test that reproduces it, then make it pass"
• "Refactor X" → "Ensure tests pass before and after"

For multi-step tasks, state a brief plan:

1. [Step] → verify: [check]
2. [Step] → verify: [check]
3. [Step] → verify: [check]

Strong success criteria let you loop independently. Weak criteria ("make it work") require constant clarification.

These guidelines are working if: fewer unnecessary changes in diffs, fewer rewrites due to overcomplication, and clarifying questions come before implementation rather than after mistakes.

RTK (Rust Token Killer) - Token-Optimized Commands

Golden Rule

Always prefix commands with rtk. If RTK has a dedicated filter, it uses it. If not, it passes through unchanged. This means RTK is always safe to use.

Important: Even in command chains with &&, use rtk:

# ❌ Wrong
git add . && git commit -m "msg" && git push

# ✅ Correct
rtk git add . && rtk git commit -m "msg" && rtk git push

RTK Commands by Workflow

Build & Compile (80-90% savings)

rtk cargo build         # Cargo build output
rtk cargo check         # Cargo check output
rtk cargo clippy        # Clippy warnings grouped by file (80%)
rtk tsc                 # TypeScript errors grouped by file/code (83%)
rtk lint                # ESLint/Biome violations grouped (84%)
rtk prettier --check    # Files needing format only (70%)
rtk next build          # Next.js build with route metrics (87%)

Test (60-99% savings)

rtk cargo test          # Cargo test failures only (90%)
rtk go test             # Go test failures only (90%)
rtk jest                # Jest failures only (99.5%)
rtk vitest              # Vitest failures only (99.5%)
rtk playwright test     # Playwright failures only (94%)
rtk pytest              # Python test failures only (90%)
rtk rake test           # Ruby test failures only (90%)
rtk rspec               # RSpec test failures only (60%)
rtk test <cmd>          # Generic test wrapper - failures only

Git (59-80% savings)

rtk git status          # Compact status
rtk git log             # Compact log (works with all git flags)
rtk git diff            # Compact diff (80%)
rtk git show            # Compact show (80%)
rtk git add             # Ultra-compact confirmations (59%)
rtk git commit          # Ultra-compact confirmations (59%)
rtk git push            # Ultra-compact confirmations
rtk git pull            # Ultra-compact confirmations
rtk git branch          # Compact branch list
rtk git fetch           # Compact fetch
rtk git stash           # Compact stash
rtk git worktree        # Compact worktree

Note: Git passthrough works for ALL subcommands, even those not explicitly listed.

GitHub (26-87% savings)

rtk gh pr view <num>    # Compact PR view (87%)
rtk gh pr checks        # Compact PR checks (79%)
rtk gh run list         # Compact workflow runs (82%)
rtk gh issue list       # Compact issue list (80%)
rtk gh api              # Compact API responses (26%)

JavaScript/TypeScript Tooling (70-90% savings)

rtk pnpm list           # Compact dependency tree (70%)
rtk pnpm outdated       # Compact outdated packages (80%)
rtk pnpm install        # Compact install output (90%)
rtk npm run <script>    # Compact npm script output
rtk npx <cmd>           # Compact npx command output
rtk prisma              # Prisma without ASCII art (88%)

Files & Search (60-75% savings)

rtk ls <path>           # Tree format, compact (65%)
rtk read <file>         # Code reading with filtering (60%)
rtk grep <pattern>      # Search grouped by file (75%). Format flags (-c, -l, -L, -o, -Z) run raw.
rtk find <pattern>      # Find grouped by directory (70%)

Analysis & Debug (70-90% savings)

rtk err <cmd>           # Filter errors only from any command
rtk log <file>          # Deduplicated logs with counts
rtk json <file>         # JSON structure without values
rtk deps                # Dependency overview
rtk env                 # Environment variables compact
rtk summary <cmd>       # Smart summary of command output
rtk diff                # Ultra-compact diffs

Infrastructure (85% savings)

rtk docker ps           # Compact container list
rtk docker images       # Compact image list
rtk docker logs <c>     # Deduplicated logs
rtk kubectl get         # Compact resource list
rtk kubectl logs        # Deduplicated pod logs

Network (65-70% savings)

rtk curl <url>          # Compact HTTP responses (70%)
rtk wget <url>          # Compact download output (65%)

Meta Commands

rtk gain                # View token savings statistics
rtk gain --history      # View command history with savings
rtk discover            # Analyze Claude Code sessions for missed RTK usage
rtk proxy <cmd>         # Run command without filtering (for debugging)
rtk init                # Add RTK instructions to CLAUDE.md
rtk init --global       # Add RTK to ~/.claude/CLAUDE.md

Token Savings Overview

Overall average: 60-90% token reduction on common development operations.