## Problem

Users frequently ask after building:
- "Where is the claw binary?"
- "Did the build actually work?"
- "Why can't I run \`claw\` from anywhere?"

This happens because \`cargo build\` puts the binary in \`rust/target/debug/claw\`
(or \`rust/target/release/claw\`), and new users don't know:
1. Where to find it
2. How to test it
3. How to add it to PATH (optional but common follow-up)

## Fix

Added new section "Post-build: locate the binary and verify" to README covering:

1. **Binary location table:** debug vs. release, macOS/Linux vs. Windows paths
2. **Verification commands:** Test the binary with \`--help\` and \`doctor\`
3. **Three ways to add to PATH:**
   - Symlink (macOS/Linux): \`ln -s ... /usr/local/bin/claw\`
   - cargo install: \`cargo install --path . --force\`
   - Shell profile update: add rust/target/debug to \$PATH
4. **Troubleshooting:** Common errors ("command not found", "permission denied",
   debug vs. release build speed)

## Impact

New users can now:
- Find the binary immediately after build
- Run it and verify with \`claw doctor\`
- Know their options for system-wide access

Also filed ROADMAP #153 documenting the gap.

Closes ROADMAP #153.