nav-start

# Navigator Navigator Skill Load the Navigator documentation navigator to start your development session with optimized context. ## When to Invoke Invoke this skill when the user: - Says "start my session", "begin work", "start working" - Says "load the navigator", "show me the docs" - Asks "what should I work on?" - Mentions "resume work", "continue from where I left off" - Asks about project structure or current tasks **DO NOT invoke** if: - User already ran `/nav:start` command this conversation - Navigator already loaded (check conversation history) - User is in middle of implementation (only invoke at session start) ## Execution Steps ### Step 0: Detect SessionStart Hook Injection (Fast Path) [v6.9.0+] **Before doing anything else**, check whether the SessionStart hook has already injected Navigator context into this session. The hook emits a sentinel string on success: ``` <!-- nav-session-start-injected:v1 --> ``` **If the sentinel is present in your system context** (it appears inside a SessionStart system reminder block at the very top of the conversation): → **Fast path activated**. Do NOT execute Steps 1–7. The data those steps would Read is already in your context window. Skip directly to **Step 8 (Display Session Summary)** and render it using the injected data. This eliminates ~6 Read tool invocations per session start and saves ~1.5-2k tokens of tool-call ceremony. The user-visible output must be **byte-identical** to the legacy path — they...