feat: TypeScript installation wizard with @clack/prompts TUI (#1)

Co-authored-by: Jason Woltje <jason@diversecanvas.com> Co-committed-by: Jason Woltje <jason@diversecanvas.com>
2026-02-21 18:25:51 +00:00
parent e3ec3e32e5
commit 6a84f7e210
56 changed files with 20647 additions and 31 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules/
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -9,11 +9,13 @@ This file defines the mandatory behavior for all Mosaic agent runtimes.
 Before responding to any user message, you MUST read these files in order:

 1. `~/.config/mosaic/SOUL.md`
-2. `~/.config/mosaic/STANDARDS.md`
-3. `~/.config/mosaic/AGENTS.md`
-4. `~/.config/mosaic/guides/E2E-DELIVERY.md`
-5. Project-local `AGENTS.md` (if present)
-6. Runtime-specific reference:
+2. `~/.config/mosaic/USER.md`
+3. `~/.config/mosaic/STANDARDS.md`
+4. `~/.config/mosaic/AGENTS.md`
+5. `~/.config/mosaic/TOOLS.md`
+6. `~/.config/mosaic/guides/E2E-DELIVERY.md`
+7. Project-local `AGENTS.md` (if present)
+8. Runtime-specific reference:
   - Claude: `~/.config/mosaic/runtime/claude/RUNTIME.md`
   - Codex: `~/.config/mosaic/runtime/codex/RUNTIME.md`
   - OpenCode: `~/.config/mosaic/runtime/opencode/RUNTIME.md`
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@ Universal agent standards layer for Claude Code, Codex, and OpenCode.

 One config, every runtime, same standards.

+> **This repository is a generic framework baseline.** No personal data, credentials, user-specific preferences, or machine-specific paths should be committed. All personalization happens at install time via `mosaic init` or by editing files in `~/.config/mosaic/` after installation.
+
 ## Quick Install

 ### Mac / Linux
@@ -42,7 +44,10 @@ After install, open a new terminal (or `source ~/.bashrc`) and run:
 mosaic init
 ```

-This generates `~/.config/mosaic/SOUL.md` — your agent identity contract. It's loaded into every session regardless of runtime.
+This generates three files loaded into every agent session:
+- `SOUL.md` — agent identity contract (name, style, guardrails)
+- `USER.md` — your user profile (name, timezone, accessibility, preferences)
+- `TOOLS.md` — machine-level tool reference (git providers, credentials, CLI patterns)

 ## Launching Agent Sessions

@@ -65,7 +70,9 @@ You can still launch runtimes directly (`claude`, `codex`, etc.) — thin runtim
 ```
 ~/.config/mosaic/
 ├── AGENTS.md              ← THE source of truth (all standards, all runtimes)
-├── SOUL.md                ← User identity (generated by mosaic init)
+├── SOUL.md                ← Agent identity (generated by mosaic init)
+├── USER.md                ← User profile and accessibility (generated by mosaic init)
+├── TOOLS.md               ← Machine-level tool reference (generated by mosaic init)
 ├── STANDARDS.md           ← Machine-wide standards
 ├── guides/E2E-DELIVERY.md ← Mandatory E2E software delivery procedure
 ├── guides/PRD.md          ← Mandatory PRD requirements gate before coding
@@ -121,7 +128,7 @@ mosaic upgrade project ... # Project file cleanup mode (see below)
 Upgrade the installed framework in place:

 ```bash
-# Default (safe): keep local SOUL.md + memory
+# Default (safe): keep local SOUL.md, USER.md, TOOLS.md + memory
 mosaic upgrade

 # Check current/target release info without changing files
@@ -245,7 +252,7 @@ cd ~/src/mosaic-bootstrap && git pull && bash install.sh
 ```

 If an existing install is detected, the installer prompts for:
- `keep` (recommended): preserve local `SOUL.md` and `memory/`
+- `keep` (recommended): preserve local `SOUL.md`, `USER.md`, `TOOLS.md`, and `memory/`
 - `overwrite`: replace everything in `~/.config/mosaic`

 Or use the one-liner again — it always pulls the latest:
--- a/SOUL.md
+++ b/SOUL.md
@@ -5,14 +5,14 @@ It is loaded globally and applies to all sessions regardless of runtime or proje

 ## Identity

-You are **Jarvis** in this session.
+You are **Assistant** in this session.

 - Runtime (Claude, Codex, OpenCode, etc.) is implementation detail.
 - Role identity: execution partner and visibility engine

 If asked "who are you?", answer:

-`I am Jarvis, running on <runtime>.`
+`I am Assistant, running on <runtime>.`

 ## Behavioral Principles

@@ -20,7 +20,7 @@ If asked "who are you?", answer:
 2. Practical execution over abstract planning.
 3. Truthfulness over confidence: state uncertainty explicitly.
 4. Visible state over hidden assumptions.
-5. PDA-friendly language, communication style, and iconography. Avoid overwhelming info and communication style..
+5. Accessibility-aware — see `~/.config/mosaic/USER.md` for user-specific accommodations.

 ## Communication Style

@@ -42,7 +42,8 @@ If asked "who are you?", answer:
 - Do not perform destructive actions without explicit instruction.
 - Do not silently change intent, scope, or definitions.
 - Do not create fake policy by writing canned responses for every prompt.
-
+- Prefer `trash` over `rm` when available — recoverable beats gone forever.
+- Write decisions and learnings to files — "mental notes" do not survive session restarts.

 ## Why This Exists

--- a/TOOLS.md
+++ b/TOOLS.md
@@ -0,0 +1,60 @@
+# Machine-Level Tool Reference
+
+Centralized reference for tools, credentials, and CLI patterns available across all projects.
+Project-specific tooling belongs in the project's `AGENTS.md`, not here.
+
+## Mosaic Git Wrappers (Use First)
+
+Mosaic wrappers at `~/.config/mosaic/rails/git/*.sh` handle platform detection and edge cases. Always use these before raw CLI commands.
+
+```bash
+# Issues
+~/.config/mosaic/rails/git/issue-create.sh
+~/.config/mosaic/rails/git/issue-close.sh
+
+# PRs
+~/.config/mosaic/rails/git/pr-create.sh
+~/.config/mosaic/rails/git/pr-merge.sh
+
+# Milestones
+~/.config/mosaic/rails/git/milestone-create.sh
+
+# CI queue guard (required before push/merge)
+~/.config/mosaic/rails/git/ci-queue-wait.sh --purpose push|merge
+```
+
+## Code Review (Codex)
+
+```bash
+# Code quality review
+~/.config/mosaic/rails/codex/codex-code-review.sh --uncommitted
+
+# Security review
+~/.config/mosaic/rails/codex/codex-security-review.sh --uncommitted
+```
+
+## Git Providers
+
+| Instance | URL | CLI | Purpose |
+|----------|-----|-----|---------|
+| (add your git providers here) | | | |
+
+## Credentials
+
+**Location:** (configure your credential file path)
+
+**Never expose actual values. Never commit credential files.**
+
+## CLI Gotchas
+
+(Add platform-specific CLI gotchas as you discover them. Examples: TTY requirements, default list limits, API fallback patterns.)
+
+## Custom Tools
+
+(Add any machine-specific tools, scripts, or workflows here.)
+
+## Safety Defaults
+
+- Prefer `trash` over `rm` when available — recoverable beats gone forever
+- Never run destructive commands without explicit instruction
+- Write it down — "mental notes" don't survive session restarts; files do
--- a/USER.md
+++ b/USER.md
@@ -0,0 +1,37 @@
+# User Profile
+
+This file defines user-specific context for all agent sessions.
+It is loaded globally and applies regardless of runtime or project.
+
+> **This file has not been personalized yet.**
+> Run `mosaic init` to set up your user profile, or edit this file directly.
+
+## Identity
+
+- **Name:** (not configured)
+- **Pronouns:** (not configured)
+- **Timezone:** (not configured)
+
+## Background
+
+(Run `mosaic init` or edit this section with your professional background.)
+
+## Accessibility
+
+(Add any neurodivergence accommodations, communication preferences, or accessibility needs here. Agents will adapt their behavior based on this section.)
+
+## Communication Preferences
+
+- Direct and concise
+- No sycophancy
+- Executive summaries and tables for overview
+
+## Personal Boundaries
+
+(Add any personal boundaries or preferences agents should respect.)
+
+## Current Projects
+
+| Project | Stack | Registry |
+|---------|-------|----------|
+| (none configured) | | |
--- a/bin/mosaic
+++ b/bin/mosaic
@@ -148,6 +148,17 @@ For required push/merge/issue-close/release actions, execute without routine con
 EOF

  cat "$MOSAIC_HOME/AGENTS.md"
+
+  if [[ -f "$MOSAIC_HOME/USER.md" ]]; then
+    printf '\n\n# User Profile\n\n'
+    cat "$MOSAIC_HOME/USER.md"
+  fi
+
+  if [[ -f "$MOSAIC_HOME/TOOLS.md" ]]; then
+    printf '\n\n# Machine Tools\n\n'
+    cat "$MOSAIC_HOME/TOOLS.md"
+  fi
+
  printf '\n\n# Runtime-Specific Contract\n\n'
  cat "$runtime_file"
 }
@@ -266,6 +277,12 @@ launch_yolo() {

 # Delegate to existing scripts
 run_init() {
+  # Prefer wizard if Node.js and bundle are available
+  local wizard_bin="$MOSAIC_HOME/dist/mosaic-wizard.mjs"
+  if command -v node >/dev/null 2>&1 && [[ -f "$wizard_bin" ]]; then
+    exec node "$wizard_bin" "$@"
+  fi
+  # Fallback to legacy bash wizard
  check_mosaic_home
  exec "$MOSAIC_HOME/bin/mosaic-init" "$@"
 }
--- a/bin/mosaic-doctor
+++ b/bin/mosaic-doctor
@@ -146,6 +146,8 @@ echo "[mosaic-doctor] Mosaic home: $MOSAIC_HOME"

 # Canonical Mosaic checks
 expect_file "$MOSAIC_HOME/STANDARDS.md"
+expect_file "$MOSAIC_HOME/USER.md"
+expect_file "$MOSAIC_HOME/TOOLS.md"
 expect_dir "$MOSAIC_HOME/guides"
 expect_dir "$MOSAIC_HOME/rails"
 expect_dir "$MOSAIC_HOME/rails/quality"
--- a/bin/mosaic-init
+++ b/bin/mosaic-init
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -euo pipefail

-# mosaic-init — Interactive SOUL.md generator
+# mosaic-init — Interactive agent identity, user profile, and tool config generator
 #
 # Usage:
 #   mosaic-init                                    # Interactive mode
@@ -10,8 +10,12 @@ set -euo pipefail
 #     --accessibility "ADHD-friendly chunking" --guardrails "Never auto-commit"

 MOSAIC_HOME="${MOSAIC_HOME:-$HOME/.config/mosaic}"
-TEMPLATE="$MOSAIC_HOME/templates/SOUL.md.template"
-OUTPUT="$MOSAIC_HOME/SOUL.md"
+SOUL_TEMPLATE="$MOSAIC_HOME/templates/SOUL.md.template"
+USER_TEMPLATE="$MOSAIC_HOME/templates/USER.md.template"
+TOOLS_TEMPLATE="$MOSAIC_HOME/templates/TOOLS.md.template"
+SOUL_OUTPUT="$MOSAIC_HOME/SOUL.md"
+USER_OUTPUT="$MOSAIC_HOME/USER.md"
+TOOLS_OUTPUT="$MOSAIC_HOME/TOOLS.md"

 # Defaults
 AGENT_NAME=""
@@ -20,11 +24,28 @@ STYLE=""
 ACCESSIBILITY=""
 CUSTOM_GUARDRAILS=""

+# USER.md defaults
+USER_NAME=""
+PRONOUNS=""
+TIMEZONE=""
+BACKGROUND=""
+COMMUNICATION_PREFS=""
+PERSONAL_BOUNDARIES=""
+PROJECTS_TABLE=""
+
+# TOOLS.md defaults
+GIT_PROVIDERS_TABLE=""
+CREDENTIALS_LOCATION=""
+CUSTOM_TOOLS_SECTION=""
+
 usage() {
  cat <<USAGE
 Usage: $(basename "$0") [options]

-Generate ~/.config/mosaic/SOUL.md — the universal agent identity contract.
+Generate Mosaic identity and configuration files:
+  - SOUL.md    — Agent identity contract
+  - USER.md    — User profile and accessibility
+  - TOOLS.md   — Machine-level tool reference

 Interactive by default. Use flags to skip prompts.

@@ -34,12 +55,17 @@ Options:
  --style <style>          Communication style: direct, friendly, or formal
  --accessibility <prefs>  Accessibility preferences (e.g., "ADHD-friendly chunking")
  --guardrails <rules>     Custom guardrails (appended to defaults)
+  --user-name <name>       Your name for USER.md
+  --pronouns <pronouns>    Your pronouns (e.g., "He/Him")
+  --timezone <tz>          Your timezone (e.g., "America/Chicago")
  --non-interactive        Fail if any required value is missing (no prompts)
+  --soul-only              Only generate SOUL.md
  -h, --help               Show help
 USAGE
 }

 NON_INTERACTIVE=0
+SOUL_ONLY=0

 while [[ $# -gt 0 ]]; do
  case "$1" in
@@ -48,7 +74,11 @@ while [[ $# -gt 0 ]]; do
    --style) STYLE="$2"; shift 2 ;;
    --accessibility) ACCESSIBILITY="$2"; shift 2 ;;
    --guardrails) CUSTOM_GUARDRAILS="$2"; shift 2 ;;
+    --user-name) USER_NAME="$2"; shift 2 ;;
+    --pronouns) PRONOUNS="$2"; shift 2 ;;
+    --timezone) TIMEZONE="$2"; shift 2 ;;
    --non-interactive) NON_INTERACTIVE=1; shift ;;
+    --soul-only) SOUL_ONLY=1; shift ;;
    -h|--help) usage; exit 0 ;;
    *) echo "Unknown argument: $1" >&2; usage >&2; exit 1 ;;
  esac
@@ -85,7 +115,32 @@ prompt_if_empty() {
  eval "$var_name=\"$value\""
 }

-echo "[mosaic-init] Generating SOUL.md — your universal agent identity contract"
+prompt_multiline() {
+  local var_name="$1"
+  local prompt_text="$2"
+  local default_value="${3:-}"
+  local current_value="${!var_name}"
+
+  if [[ -n "$current_value" ]]; then
+    return
+  fi
+
+  if [[ $NON_INTERACTIVE -eq 1 ]]; then
+    eval "$var_name=\"$default_value\""
+    return
+  fi
+
+  echo "$prompt_text"
+  printf "(Press Enter to skip, or type your response): "
+  read -r value
+  if [[ -z "$value" ]]; then
+    value="$default_value"
+  fi
+  eval "$var_name=\"$value\""
+}
+
+# ── SOUL.md Generation ────────────────────────────────────────
+echo "[mosaic-init] Generating SOUL.md — agent identity contract"
 echo ""

 prompt_if_empty AGENT_NAME "What name should agents use" "Assistant"
@@ -124,25 +179,28 @@ case "$STYLE" in
    BEHAVIORAL_PRINCIPLES="1. Clarity over performance theater.
 2. Practical execution over abstract planning.
 3. Truthfulness over confidence: state uncertainty explicitly.
-4. Visible state over hidden assumptions."
+4. Visible state over hidden assumptions.
+5. Accessibility-aware — see \`~/.config/mosaic/USER.md\` for user-specific accommodations."
    ;;
  friendly)
    BEHAVIORAL_PRINCIPLES="1. Be helpful and approachable while staying efficient.
 2. Provide context and explain reasoning when helpful.
 3. Truthfulness over confidence: state uncertainty explicitly.
-4. Visible state over hidden assumptions."
+4. Visible state over hidden assumptions.
+5. Accessibility-aware — see \`~/.config/mosaic/USER.md\` for user-specific accommodations."
    ;;
  formal)
    BEHAVIORAL_PRINCIPLES="1. Maintain professional, structured communication.
 2. Provide thorough analysis with explicit tradeoffs.
 3. Truthfulness over confidence: state uncertainty explicitly.
-4. Document decisions and rationale clearly."
+4. Document decisions and rationale clearly.
+5. Accessibility-aware — see \`~/.config/mosaic/USER.md\` for user-specific accommodations."
    ;;
 esac

 if [[ "$ACCESSIBILITY" != "none" && -n "$ACCESSIBILITY" ]]; then
  BEHAVIORAL_PRINCIPLES="$BEHAVIORAL_PRINCIPLES
-5. $ACCESSIBILITY."
+6. $ACCESSIBILITY."
 fi

 # Build communication style section
@@ -175,8 +233,8 @@ if [[ -n "$CUSTOM_GUARDRAILS" ]]; then
 fi

 # Verify template exists
-if [[ ! -f "$TEMPLATE" ]]; then
-  echo "[mosaic-init] ERROR: Template not found: $TEMPLATE" >&2
+if [[ ! -f "$SOUL_TEMPLATE" ]]; then
+  echo "[mosaic-init] ERROR: Template not found: $SOUL_TEMPLATE" >&2
  echo "[mosaic-init] Run the Mosaic installer first." >&2
  exit 1
 fi
@@ -194,17 +252,173 @@ awk -v name="$AGENT_NAME" \
      gsub(/\{\{COMMUNICATION_STYLE\}\}/, comms)
      gsub(/\{\{CUSTOM_GUARDRAILS\}\}/, guardrails)
      print
-    }' "$TEMPLATE" > "$OUTPUT"
+    }' "$SOUL_TEMPLATE" > "$SOUL_OUTPUT"

 echo ""
-echo "[mosaic-init] Generated: $OUTPUT"
+echo "[mosaic-init] Generated: $SOUL_OUTPUT"
 echo "[mosaic-init] Agent name: $AGENT_NAME"
 echo "[mosaic-init] Style: $STYLE"

-# Push to runtime adapters
+if [[ $SOUL_ONLY -eq 1 ]]; then
+  # Push to runtime adapters and exit
  if [[ -x "$MOSAIC_HOME/bin/mosaic-link-runtime-assets" ]]; then
    echo "[mosaic-init] Updating runtime adapters..."
    "$MOSAIC_HOME/bin/mosaic-link-runtime-assets"
  fi
-
  echo "[mosaic-init] Done. Launch with: mosaic claude"
+  exit 0
+fi
+
+# ── USER.md Generation ────────────────────────────────────────
+echo ""
+echo "[mosaic-init] Generating USER.md — user profile"
+echo ""
+
+prompt_if_empty USER_NAME "Your name" ""
+prompt_if_empty PRONOUNS "Your pronouns" "They/Them"
+prompt_if_empty TIMEZONE "Your timezone" "UTC"
+
+prompt_multiline BACKGROUND "Your professional background (brief summary)" "(not configured)"
+
+# Build accessibility section
+ACCESSIBILITY_SECTION=""
+if [[ "$ACCESSIBILITY" != "none" && -n "$ACCESSIBILITY" ]]; then
+  ACCESSIBILITY_SECTION="$ACCESSIBILITY"
+else
+  if [[ $NON_INTERACTIVE -eq 0 ]]; then
+    echo ""
+    prompt_multiline ACCESSIBILITY_SECTION \
+      "Accessibility or neurodivergence accommodations (or press Enter to skip)" \
+      "(No specific accommodations configured. Edit this section to add any.)"
+  else
+    ACCESSIBILITY_SECTION="(No specific accommodations configured. Edit this section to add any.)"
+  fi
+fi
+
+# Build communication preferences
+if [[ -z "$COMMUNICATION_PREFS" ]]; then
+  case "$STYLE" in
+    direct)
+      COMMUNICATION_PREFS="- Direct and concise
+- No sycophancy
+- Executive summaries and tables for overview"
+      ;;
+    friendly)
+      COMMUNICATION_PREFS="- Warm and conversational
+- Explain reasoning when helpful
+- Balance thoroughness with brevity"
+      ;;
+    formal)
+      COMMUNICATION_PREFS="- Professional and structured
+- Thorough explanations with supporting detail
+- Formal tone with explicit recommendations"
+      ;;
+  esac
+fi
+
+prompt_multiline PERSONAL_BOUNDARIES \
+  "Personal boundaries or preferences agents should respect" \
+  "(Edit this section to add any personal boundaries.)"
+
+if [[ -z "$PROJECTS_TABLE" ]]; then
+  PROJECTS_TABLE="| Project | Stack | Registry |
+|---------|-------|----------|
+| (none configured) | | |"
+fi
+
+if [[ ! -f "$USER_TEMPLATE" ]]; then
+  echo "[mosaic-init] WARN: USER.md template not found: $USER_TEMPLATE" >&2
+  echo "[mosaic-init] Skipping USER.md generation." >&2
+else
+  awk -v user_name="$USER_NAME" \
+      -v pronouns="$PRONOUNS" \
+      -v timezone="$TIMEZONE" \
+      -v background="$BACKGROUND" \
+      -v accessibility="$ACCESSIBILITY_SECTION" \
+      -v comms="$COMMUNICATION_PREFS" \
+      -v boundaries="$PERSONAL_BOUNDARIES" \
+      -v projects="$PROJECTS_TABLE" \
+      '{
+        gsub(/\{\{USER_NAME\}\}/, user_name)
+        gsub(/\{\{PRONOUNS\}\}/, pronouns)
+        gsub(/\{\{TIMEZONE\}\}/, timezone)
+        gsub(/\{\{BACKGROUND\}\}/, background)
+        gsub(/\{\{ACCESSIBILITY_SECTION\}\}/, accessibility)
+        gsub(/\{\{COMMUNICATION_PREFS\}\}/, comms)
+        gsub(/\{\{PERSONAL_BOUNDARIES\}\}/, boundaries)
+        gsub(/\{\{PROJECTS_TABLE\}\}/, projects)
+        print
+      }' "$USER_TEMPLATE" > "$USER_OUTPUT"
+
+  echo "[mosaic-init] Generated: $USER_OUTPUT"
+fi
+
+# ── TOOLS.md Generation ───────────────────────────────────────
+echo ""
+echo "[mosaic-init] Generating TOOLS.md — machine-level tool reference"
+echo ""
+
+if [[ -z "$GIT_PROVIDERS_TABLE" ]]; then
+  if [[ $NON_INTERACTIVE -eq 0 ]]; then
+    echo "Git providers (add rows for your Gitea/GitHub/GitLab instances):"
+    printf "Primary git provider URL (or press Enter to skip): "
+    read -r git_url
+    if [[ -n "$git_url" ]]; then
+      printf "Provider name: "
+      read -r git_name
+      printf "CLI tool (tea/gh/glab): "
+      read -r git_cli
+      printf "Purpose: "
+      read -r git_purpose
+      GIT_PROVIDERS_TABLE="| Instance | URL | CLI | Purpose |
+|----------|-----|-----|---------|
+| $git_name | $git_url | \`$git_cli\` | $git_purpose |"
+    else
+      GIT_PROVIDERS_TABLE="| Instance | URL | CLI | Purpose |
+|----------|-----|-----|---------|
+| (add your git providers here) | | | |"
+    fi
+  else
+    GIT_PROVIDERS_TABLE="| Instance | URL | CLI | Purpose |
+|----------|-----|-----|---------|
+| (add your git providers here) | | | |"
+  fi
+fi
+
+prompt_if_empty CREDENTIALS_LOCATION "Credential file path (or 'none')" "none"
+
+if [[ -z "$CUSTOM_TOOLS_SECTION" ]]; then
+  CUSTOM_TOOLS_SECTION="## Custom Tools
+
+(Add any machine-specific tools, scripts, or workflows here.)"
+fi
+
+if [[ ! -f "$TOOLS_TEMPLATE" ]]; then
+  echo "[mosaic-init] WARN: TOOLS.md template not found: $TOOLS_TEMPLATE" >&2
+  echo "[mosaic-init] Skipping TOOLS.md generation." >&2
+else
+  awk -v providers="$GIT_PROVIDERS_TABLE" \
+      -v creds="$CREDENTIALS_LOCATION" \
+      -v custom="$CUSTOM_TOOLS_SECTION" \
+      '{
+        gsub(/\{\{GIT_PROVIDERS_TABLE\}\}/, providers)
+        gsub(/\{\{CREDENTIALS_LOCATION\}\}/, creds)
+        gsub(/\{\{CUSTOM_TOOLS_SECTION\}\}/, custom)
+        print
+      }' "$TOOLS_TEMPLATE" > "$TOOLS_OUTPUT"
+
+  echo "[mosaic-init] Generated: $TOOLS_OUTPUT"
+fi
+
+# ── Finalize ──────────────────────────────────────────────────
+
+# Push to runtime adapters
+if [[ -x "$MOSAIC_HOME/bin/mosaic-link-runtime-assets" ]]; then
+  echo ""
+  echo "[mosaic-init] Updating runtime adapters..."
+  "$MOSAIC_HOME/bin/mosaic-link-runtime-assets"
+fi
+
+echo ""
+echo "[mosaic-init] Done. Launch with: mosaic claude"
+echo "[mosaic-init] Edit USER.md and TOOLS.md directly for further customization."
--- a/bin/mosaic-wizard
+++ b/bin/mosaic-wizard
@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# mosaic-wizard — Thin shell wrapper for the bundled TypeScript wizard
+MOSAIC_HOME="${MOSAIC_HOME:-$HOME/.config/mosaic}"
+
+# Look for the bundle in the installed location first, then the source repo
+WIZARD_BIN="$MOSAIC_HOME/dist/mosaic-wizard.mjs"
+if [[ ! -f "$WIZARD_BIN" ]]; then
+  WIZARD_BIN="$(cd "$(dirname "$0")/.." && pwd)/dist/mosaic-wizard.mjs"
+fi
+
+if [[ ! -f "$WIZARD_BIN" ]]; then
+  echo "[mosaic-wizard] ERROR: Wizard bundle not found." >&2
+  echo "[mosaic-wizard] Run 'pnpm build' in the mosaic-bootstrap repo, or re-install Mosaic." >&2
+  exit 1
+fi
+
+if ! command -v node >/dev/null 2>&1; then
+  echo "[mosaic-wizard] ERROR: Node.js is required but not found." >&2
+  echo "[mosaic-wizard] Install Node.js 18+ from https://nodejs.org" >&2
+  exit 1
+fi
+
+exec node "$WIZARD_BIN" "$@"
--- a/dist/mosaic-wizard.mjs
+++ b/dist/mosaic-wizard.mjs
--- a/install.sh
+++ b/install.sh
@@ -4,7 +4,7 @@ set -euo pipefail
 SOURCE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 TARGET_DIR="${MOSAIC_HOME:-$HOME/.config/mosaic}"
 INSTALL_MODE="${MOSAIC_INSTALL_MODE:-prompt}" # prompt|keep|overwrite
-PRESERVE_PATHS=("SOUL.md" "memory")
+PRESERVE_PATHS=("SOUL.md" "USER.md" "TOOLS.md" "memory")

 # Colors (disabled if not a terminal)
 if [[ -t 1 ]]; then
@@ -46,7 +46,7 @@ select_install_mode() {
        echo ""
        echo "Existing Mosaic install detected at: $TARGET_DIR"
        echo "Choose reinstall mode:"
-        echo "  1) keep      Keep local files (SOUL.md, memory/) while updating framework"
+        echo "  1) keep      Keep local files (SOUL.md, USER.md, TOOLS.md, memory/) while updating framework"
        echo "  2) overwrite Replace everything in $TARGET_DIR"
        echo "  3) cancel    Abort install"
        printf "Selection [1/2/3] (default: 1): "
@@ -131,7 +131,7 @@ mkdir -p "$TARGET_DIR"
 select_install_mode

 if [[ "$INSTALL_MODE" == "keep" ]]; then
-  ok "Install mode: keep local SOUL.md/memory while updating framework"
+  ok "Install mode: keep local SOUL.md/USER.md/TOOLS.md/memory while updating framework"
 else
  ok "Install mode: overwrite existing files"
 fi
@@ -226,7 +226,9 @@ if [[ "$PATH_CHANGED" == "true" ]]; then
 fi

 if [[ ! -f "$TARGET_DIR/SOUL.md" ]]; then
-  NEXT_STEPS+=("Run ${CYAN}mosaic init${RESET} to set up your agent identity (SOUL.md).")
+  NEXT_STEPS+=("Run ${CYAN}mosaic init${RESET} to set up your agent identity (SOUL.md), user profile (USER.md), and tool config (TOOLS.md).")
+elif grep -q "not configured" "$TARGET_DIR/USER.md" 2>/dev/null; then
+  NEXT_STEPS+=("Run ${CYAN}mosaic init${RESET} to personalize your user profile (USER.md) and tool config (TOOLS.md).")
 fi

 if [[ ${#NEXT_STEPS[@]} -gt 0 ]]; then
--- a/package.json
+++ b/package.json
@@ -0,0 +1,30 @@
+{
+  "name": "mosaic-wizard",
+  "version": "0.2.0",
+  "type": "module",
+  "private": true,
+  "bin": {
+    "mosaic-wizard": "./dist/mosaic-wizard.mjs"
+  },
+  "scripts": {
+    "build": "tsdown",
+    "dev": "tsx src/index.ts",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@clack/prompts": "^0.9",
+    "commander": "^13",
+    "picocolors": "^1.1",
+    "yaml": "^2.7",
+    "zod": "^3.24"
+  },
+  "devDependencies": {
+    "@types/node": "^22",
+    "tsdown": "^0.20.3",
+    "tsx": "^4.19",
+    "typescript": "^5.7",
+    "vitest": "^3.0"
+  }
+}
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
--- a/remote-install.sh
+++ b/remote-install.sh
@@ -37,8 +37,21 @@ if [ ! -f "$WORK_DIR/bootstrap/install.sh" ]; then
  exit 1
 fi

-echo "[mosaic] Running install..."
 cd "$WORK_DIR/bootstrap"
+
+# Prefer TypeScript wizard if Node.js 18+ and bundle are available
+WIZARD_BIN="$WORK_DIR/bootstrap/dist/mosaic-wizard.mjs"
+if command -v node >/dev/null 2>&1 && [ -f "$WIZARD_BIN" ]; then
+  NODE_MAJOR="$(node -e 'console.log(process.versions.node.split(".")[0])')"
+  if [ "$NODE_MAJOR" -ge 18 ] 2>/dev/null; then
+    echo "[mosaic] Running wizard installer (Node.js $NODE_MAJOR detected)..."
+    node "$WIZARD_BIN" --source-dir "$WORK_DIR/bootstrap"
+    echo "[mosaic] Cleaning up temporary files..."
+    exit 0
+  fi
+fi
+
+echo "[mosaic] Running legacy install..."
 bash install.sh

 echo "[mosaic] Cleaning up temporary files..."
--- a/src/config/config-service.ts
+++ b/src/config/config-service.ts
@@ -0,0 +1,26 @@
+import type { SoulConfig, UserConfig, ToolsConfig, InstallAction } from '../types.js';
+import { FileConfigAdapter } from './file-adapter.js';
+
+/**
+ * ConfigService interface — abstracts config read/write operations.
+ * Currently backed by FileConfigAdapter (writes .md files from templates).
+ * Designed for future swap to SqliteConfigAdapter or PostgresConfigAdapter.
+ */
+export interface ConfigService {
+  readSoul(): Promise<SoulConfig>;
+  readUser(): Promise<UserConfig>;
+  readTools(): Promise<ToolsConfig>;
+
+  writeSoul(config: SoulConfig): Promise<void>;
+  writeUser(config: UserConfig): Promise<void>;
+  writeTools(config: ToolsConfig): Promise<void>;
+
+  syncFramework(action: InstallAction): Promise<void>;
+}
+
+export function createConfigService(
+  mosaicHome: string,
+  sourceDir: string,
+): ConfigService {
+  return new FileConfigAdapter(mosaicHome, sourceDir);
+}
--- a/src/config/file-adapter.ts
+++ b/src/config/file-adapter.ts
@@ -0,0 +1,163 @@
+import { readFileSync, existsSync } from 'node:fs';
+import { join } from 'node:path';
+import type { ConfigService } from './config-service.js';
+import type {
+  SoulConfig,
+  UserConfig,
+  ToolsConfig,
+  InstallAction,
+} from '../types.js';
+import { soulSchema, userSchema, toolsSchema } from './schemas.js';
+import { renderTemplate } from '../template/engine.js';
+import {
+  buildSoulTemplateVars,
+  buildUserTemplateVars,
+  buildToolsTemplateVars,
+} from '../template/builders.js';
+import { atomicWrite, backupFile, syncDirectory } from '../platform/file-ops.js';
+
+/**
+ * Parse a SoulConfig from an existing SOUL.md file.
+ */
+function parseSoulFromMarkdown(content: string): SoulConfig {
+  const config: SoulConfig = {};
+
+  const nameMatch = content.match(/You are \*\*(.+?)\*\*/);
+  if (nameMatch) config.agentName = nameMatch[1];
+
+  const roleMatch = content.match(/Role identity: (.+)/);
+  if (roleMatch) config.roleDescription = roleMatch[1];
+
+  if (content.includes('Be direct, concise')) {
+    config.communicationStyle = 'direct';
+  } else if (content.includes('Be warm and conversational')) {
+    config.communicationStyle = 'friendly';
+  } else if (content.includes('Use professional, structured')) {
+    config.communicationStyle = 'formal';
+  }
+
+  return config;
+}
+
+/**
+ * Parse a UserConfig from an existing USER.md file.
+ */
+function parseUserFromMarkdown(content: string): UserConfig {
+  const config: UserConfig = {};
+
+  const nameMatch = content.match(/\*\*Name:\*\* (.+)/);
+  if (nameMatch) config.userName = nameMatch[1];
+
+  const pronounsMatch = content.match(/\*\*Pronouns:\*\* (.+)/);
+  if (pronounsMatch) config.pronouns = pronounsMatch[1];
+
+  const tzMatch = content.match(/\*\*Timezone:\*\* (.+)/);
+  if (tzMatch) config.timezone = tzMatch[1];
+
+  return config;
+}
+
+/**
+ * Parse a ToolsConfig from an existing TOOLS.md file.
+ */
+function parseToolsFromMarkdown(content: string): ToolsConfig {
+  const config: ToolsConfig = {};
+
+  const credsMatch = content.match(/\*\*Location:\*\* (.+)/);
+  if (credsMatch) config.credentialsLocation = credsMatch[1];
+
+  return config;
+}
+
+export class FileConfigAdapter implements ConfigService {
+  constructor(
+    private mosaicHome: string,
+    private sourceDir: string,
+  ) {}
+
+  async readSoul(): Promise<SoulConfig> {
+    const path = join(this.mosaicHome, 'SOUL.md');
+    if (!existsSync(path)) return {};
+    return parseSoulFromMarkdown(readFileSync(path, 'utf-8'));
+  }
+
+  async readUser(): Promise<UserConfig> {
+    const path = join(this.mosaicHome, 'USER.md');
+    if (!existsSync(path)) return {};
+    return parseUserFromMarkdown(readFileSync(path, 'utf-8'));
+  }
+
+  async readTools(): Promise<ToolsConfig> {
+    const path = join(this.mosaicHome, 'TOOLS.md');
+    if (!existsSync(path)) return {};
+    return parseToolsFromMarkdown(readFileSync(path, 'utf-8'));
+  }
+
+  async writeSoul(config: SoulConfig): Promise<void> {
+    const validated = soulSchema.parse(config);
+    const templatePath = this.findTemplate('SOUL.md.template');
+    if (!templatePath) return;
+
+    const template = readFileSync(templatePath, 'utf-8');
+    const vars = buildSoulTemplateVars(validated);
+    const output = renderTemplate(template, vars);
+
+    const outPath = join(this.mosaicHome, 'SOUL.md');
+    backupFile(outPath);
+    atomicWrite(outPath, output);
+  }
+
+  async writeUser(config: UserConfig): Promise<void> {
+    const validated = userSchema.parse(config);
+    const templatePath = this.findTemplate('USER.md.template');
+    if (!templatePath) return;
+
+    const template = readFileSync(templatePath, 'utf-8');
+    const vars = buildUserTemplateVars(validated);
+    const output = renderTemplate(template, vars);
+
+    const outPath = join(this.mosaicHome, 'USER.md');
+    backupFile(outPath);
+    atomicWrite(outPath, output);
+  }
+
+  async writeTools(config: ToolsConfig): Promise<void> {
+    const validated = toolsSchema.parse(config);
+    const templatePath = this.findTemplate('TOOLS.md.template');
+    if (!templatePath) return;
+
+    const template = readFileSync(templatePath, 'utf-8');
+    const vars = buildToolsTemplateVars(validated);
+    const output = renderTemplate(template, vars);
+
+    const outPath = join(this.mosaicHome, 'TOOLS.md');
+    backupFile(outPath);
+    atomicWrite(outPath, output);
+  }
+
+  async syncFramework(action: InstallAction): Promise<void> {
+    const preservePaths =
+      action === 'keep' || action === 'reconfigure'
+        ? ['SOUL.md', 'USER.md', 'TOOLS.md', 'memory']
+        : [];
+
+    syncDirectory(this.sourceDir, this.mosaicHome, {
+      preserve: preservePaths,
+      excludeGit: true,
+    });
+  }
+
+  /**
+   * Look for template in source dir first, then mosaic home.
+   */
+  private findTemplate(name: string): string | null {
+    const candidates = [
+      join(this.sourceDir, 'templates', name),
+      join(this.mosaicHome, 'templates', name),
+    ];
+    for (const path of candidates) {
+      if (existsSync(path)) return path;
+    }
+    return null;
+  }
+}
--- a/src/config/schemas.ts
+++ b/src/config/schemas.ts
@@ -0,0 +1,51 @@
+import { z } from 'zod';
+
+export const communicationStyleSchema = z
+  .enum(['direct', 'friendly', 'formal'])
+  .default('direct');
+
+export const soulSchema = z
+  .object({
+    agentName: z.string().min(1).max(50).default('Assistant'),
+    roleDescription: z
+      .string()
+      .default('execution partner and visibility engine'),
+    communicationStyle: communicationStyleSchema,
+    accessibility: z.string().default('none'),
+    customGuardrails: z.string().default(''),
+  })
+  .partial();
+
+export const gitProviderSchema = z.object({
+  name: z.string().min(1),
+  url: z.string().min(1),
+  cli: z.string().min(1),
+  purpose: z.string().min(1),
+});
+
+export const userSchema = z
+  .object({
+    userName: z.string().default(''),
+    pronouns: z.string().default('They/Them'),
+    timezone: z.string().default('UTC'),
+    background: z.string().default('(not configured)'),
+    accessibilitySection: z
+      .string()
+      .default(
+        '(No specific accommodations configured. Edit this section to add any.)',
+      ),
+    communicationPrefs: z.string().default(''),
+    personalBoundaries: z
+      .string()
+      .default('(Edit this section to add any personal boundaries.)'),
+    projectsTable: z.string().default(''),
+  })
+  .partial();
+
+export const toolsSchema = z
+  .object({
+    gitProviders: z.array(gitProviderSchema).default([]),
+    credentialsLocation: z.string().default('none'),
+    customToolsSection: z.string().default(''),
+  })
+  .partial();
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -0,0 +1,38 @@
+import { homedir } from 'node:os';
+import { join } from 'node:path';
+
+export const VERSION = '0.2.0';
+
+export const DEFAULT_MOSAIC_HOME = join(homedir(), '.config', 'mosaic');
+
+export const DEFAULTS = {
+  agentName: 'Assistant',
+  roleDescription: 'execution partner and visibility engine',
+  communicationStyle: 'direct' as const,
+  pronouns: 'They/Them',
+  timezone: 'UTC',
+  background: '(not configured)',
+  accessibilitySection: '(No specific accommodations configured. Edit this section to add any.)',
+  personalBoundaries: '(Edit this section to add any personal boundaries.)',
+  projectsTable: `| Project | Stack | Registry |
+|---------|-------|----------|
+| (none configured) | | |`,
+  credentialsLocation: 'none',
+  customToolsSection: `## Custom Tools
+
+(Add any machine-specific tools, scripts, or workflows here.)`,
+  gitProvidersTable: `| Instance | URL | CLI | Purpose |
+|----------|-----|-----|---------|
+| (add your git providers here) | | | |`,
+};
+
+export const RECOMMENDED_SKILLS = new Set([
+  'brainstorming',
+  'code-review-excellence',
+  'lint',
+  'systematic-debugging',
+  'verification-before-completion',
+  'writing-plans',
+  'executing-plans',
+  'architecture-patterns',
+]);
--- a/src/errors.ts
+++ b/src/errors.ts
@@ -0,0 +1,20 @@
+export class WizardCancelledError extends Error {
+  override name = 'WizardCancelledError';
+  constructor() {
+    super('Wizard cancelled by user');
+  }
+}
+
+export class ValidationError extends Error {
+  override name = 'ValidationError';
+  constructor(message: string) {
+    super(message);
+  }
+}
+
+export class TemplateError extends Error {
+  override name = 'TemplateError';
+  constructor(templatePath: string, message: string) {
+    super(`Template error in ${templatePath}: ${message}`);
+  }
+}
--- a/src/index.ts
+++ b/src/index.ts
@@ -0,0 +1,81 @@
+import { Command } from 'commander';
+import { homedir } from 'node:os';
+import { join } from 'node:path';
+import { ClackPrompter } from './prompter/clack-prompter.js';
+import { HeadlessPrompter } from './prompter/headless-prompter.js';
+import { createConfigService } from './config/config-service.js';
+import { runWizard } from './wizard.js';
+import { WizardCancelledError } from './errors.js';
+import { VERSION, DEFAULT_MOSAIC_HOME } from './constants.js';
+import type { CommunicationStyle } from './types.js';
+
+const program = new Command()
+  .name('mosaic-wizard')
+  .description('Mosaic Installation Wizard')
+  .version(VERSION);
+
+program
+  .option('--non-interactive', 'Run without prompts (uses defaults + flags)')
+  .option(
+    '--source-dir <path>',
+    'Source directory for framework files',
+  )
+  .option(
+    '--mosaic-home <path>',
+    'Target config directory',
+    DEFAULT_MOSAIC_HOME,
+  )
+  // SOUL.md overrides
+  .option('--name <name>', 'Agent name')
+  .option('--role <description>', 'Agent role description')
+  .option('--style <style>', 'Communication style: direct|friendly|formal')
+  .option('--accessibility <prefs>', 'Accessibility preferences')
+  .option('--guardrails <rules>', 'Custom guardrails')
+  // USER.md overrides
+  .option('--user-name <name>', 'Your name')
+  .option('--pronouns <pronouns>', 'Your pronouns')
+  .option('--timezone <tz>', 'Your timezone')
+  .action(async (opts) => {
+    try {
+      const mosaicHome: string = opts.mosaicHome;
+      const sourceDir: string = opts.sourceDir ?? mosaicHome;
+
+      const prompter = opts.nonInteractive
+        ? new HeadlessPrompter()
+        : new ClackPrompter();
+
+      const configService = createConfigService(mosaicHome, sourceDir);
+
+      const style = opts.style as CommunicationStyle | undefined;
+
+      await runWizard({
+        mosaicHome,
+        sourceDir,
+        prompter,
+        configService,
+        cliOverrides: {
+          soul: {
+            agentName: opts.name,
+            roleDescription: opts.role,
+            communicationStyle: style,
+            accessibility: opts.accessibility,
+            customGuardrails: opts.guardrails,
+          },
+          user: {
+            userName: opts.userName,
+            pronouns: opts.pronouns,
+            timezone: opts.timezone,
+          },
+        },
+      });
+    } catch (err) {
+      if (err instanceof WizardCancelledError) {
+        console.log('\nWizard cancelled.');
+        process.exit(0);
+      }
+      console.error('Wizard failed:', err);
+      process.exit(1);
+    }
+  });
+
+program.parse();
--- a/src/platform/detect.ts
+++ b/src/platform/detect.ts
@@ -0,0 +1,44 @@
+import { existsSync } from 'node:fs';
+import { join } from 'node:path';
+import { homedir, platform } from 'node:os';
+
+export type ShellType = 'zsh' | 'bash' | 'fish' | 'powershell' | 'unknown';
+
+export function detectShell(): ShellType {
+  const shell = process.env.SHELL ?? '';
+  if (shell.includes('zsh')) return 'zsh';
+  if (shell.includes('bash')) return 'bash';
+  if (shell.includes('fish')) return 'fish';
+  if (platform() === 'win32') return 'powershell';
+  return 'unknown';
+}
+
+export function getShellProfilePath(): string | null {
+  const home = homedir();
+
+  if (platform() === 'win32') {
+    return join(
+      home,
+      'Documents',
+      'PowerShell',
+      'Microsoft.PowerShell_profile.ps1',
+    );
+  }
+
+  const shell = detectShell();
+  switch (shell) {
+    case 'zsh': {
+      const zdotdir = process.env.ZDOTDIR ?? home;
+      return join(zdotdir, '.zshrc');
+    }
+    case 'bash': {
+      const bashrc = join(home, '.bashrc');
+      if (existsSync(bashrc)) return bashrc;
+      return join(home, '.profile');
+    }
+    case 'fish':
+      return join(home, '.config', 'fish', 'config.fish');
+    default:
+      return join(home, '.profile');
+  }
+}
--- a/src/platform/file-ops.ts
+++ b/src/platform/file-ops.ts
@@ -0,0 +1,116 @@
+import {
+  readFileSync,
+  writeFileSync,
+  existsSync,
+  mkdirSync,
+  copyFileSync,
+  renameSync,
+  readdirSync,
+  unlinkSync,
+  cpSync,
+  statSync,
+} from 'node:fs';
+import { dirname, join, relative } from 'node:path';
+
+const MAX_BACKUPS = 3;
+
+/**
+ * Atomic write: write to temp file, then rename.
+ * Creates parent directories as needed.
+ */
+export function atomicWrite(filePath: string, content: string): void {
+  mkdirSync(dirname(filePath), { recursive: true });
+  const tmpPath = `${filePath}.tmp-${process.pid}`;
+  writeFileSync(tmpPath, content, 'utf-8');
+  renameSync(tmpPath, filePath);
+}
+
+/**
+ * Create a backup of a file before overwriting.
+ * Rotates backups to keep at most MAX_BACKUPS.
+ */
+export function backupFile(filePath: string): string | null {
+  if (!existsSync(filePath)) return null;
+  const timestamp = new Date()
+    .toISOString()
+    .replace(/[:.]/g, '')
+    .replace('T', '-')
+    .slice(0, 19);
+  const backupPath = `${filePath}.bak-${timestamp}`;
+  copyFileSync(filePath, backupPath);
+  rotateBackups(filePath);
+  return backupPath;
+}
+
+function rotateBackups(filePath: string): void {
+  const dir = dirname(filePath);
+  const baseName = filePath.split('/').pop()!;
+  const prefix = `${baseName}.bak-`;
+
+  try {
+    const backups = readdirSync(dir)
+      .filter((f) => f.startsWith(prefix))
+      .sort()
+      .reverse();
+
+    for (let i = MAX_BACKUPS; i < backups.length; i++) {
+      unlinkSync(join(dir, backups[i]));
+    }
+  } catch {
+    // Non-fatal: backup rotation failure doesn't block writes
+  }
+}
+
+/**
+ * Sync a source directory to a target, with optional preserve paths.
+ * Replaces the rsync/cp logic from install.sh.
+ */
+export function syncDirectory(
+  source: string,
+  target: string,
+  options: { preserve?: string[]; excludeGit?: boolean } = {},
+): void {
+  const preserveSet = new Set(options.preserve ?? []);
+
+  // Collect files from source
+  function copyRecursive(src: string, dest: string, relBase: string): void {
+    if (!existsSync(src)) return;
+
+    const stat = statSync(src);
+    if (stat.isDirectory()) {
+      const relPath = relative(relBase, src);
+
+      // Skip .git
+      if (options.excludeGit && relPath === '.git') return;
+
+      // Skip preserved paths at top level
+      if (preserveSet.has(relPath) && existsSync(dest)) return;
+
+      mkdirSync(dest, { recursive: true });
+      for (const entry of readdirSync(src)) {
+        copyRecursive(join(src, entry), join(dest, entry), relBase);
+      }
+    } else {
+      const relPath = relative(relBase, src);
+
+      // Skip preserved files at top level
+      if (preserveSet.has(relPath) && existsSync(dest)) return;
+
+      mkdirSync(dirname(dest), { recursive: true });
+      copyFileSync(src, dest);
+    }
+  }
+
+  copyRecursive(source, target, source);
+}
+
+/**
+ * Safely read a file, returning null if it doesn't exist.
+ */
+export function safeReadFile(filePath: string): string | null {
+  try {
+    return readFileSync(filePath, 'utf-8');
+  } catch {
+    return null;
+  }
+}
--- a/src/prompter/clack-prompter.ts
+++ b/src/prompter/clack-prompter.ts
@@ -0,0 +1,157 @@
+import * as p from '@clack/prompts';
+import { WizardCancelledError } from '../errors.js';
+import type {
+  WizardPrompter,
+  SelectOption,
+  MultiSelectOption,
+  ProgressHandle,
+} from './interface.js';
+
+function guardCancel<T>(value: T | symbol): T {
+  if (p.isCancel(value)) {
+    throw new WizardCancelledError();
+  }
+  return value as T;
+}
+
+export class ClackPrompter implements WizardPrompter {
+  intro(message: string): void {
+    p.intro(message);
+  }
+
+  outro(message: string): void {
+    p.outro(message);
+  }
+
+  note(message: string, title?: string): void {
+    p.note(message, title);
+  }
+
+  log(message: string): void {
+    p.log.info(message);
+  }
+
+  warn(message: string): void {
+    p.log.warn(message);
+  }
+
+  async text(opts: {
+    message: string;
+    placeholder?: string;
+    defaultValue?: string;
+    validate?: (value: string) => string | void;
+  }): Promise<string> {
+    const validate = opts.validate
+      ? (v: string) => {
+          const r = opts.validate!(v);
+          return r === undefined ? undefined : r;
+        }
+      : undefined;
+    const result = await p.text({
+      message: opts.message,
+      placeholder: opts.placeholder,
+      defaultValue: opts.defaultValue,
+      validate,
+    });
+    return guardCancel(result);
+  }
+
+  async confirm(opts: {
+    message: string;
+    initialValue?: boolean;
+  }): Promise<boolean> {
+    const result = await p.confirm({
+      message: opts.message,
+      initialValue: opts.initialValue,
+    });
+    return guardCancel(result);
+  }
+
+  async select<T>(opts: {
+    message: string;
+    options: SelectOption<T>[];
+    initialValue?: T;
+  }): Promise<T> {
+    const clackOptions = opts.options.map((o) => ({
+      value: o.value as T,
+      label: o.label,
+      hint: o.hint,
+    }));
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any -- clack Option conditional type needs concrete Primitive
+    const result = await p.select({
+      message: opts.message,
+      options: clackOptions as any,
+      initialValue: opts.initialValue,
+    });
+    return guardCancel(result) as T;
+  }
+
+  async multiselect<T>(opts: {
+    message: string;
+    options: MultiSelectOption<T>[];
+    required?: boolean;
+  }): Promise<T[]> {
+    const clackOptions = opts.options.map((o) => ({
+      value: o.value as T,
+      label: o.label,
+      hint: o.hint,
+    }));
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    const result = await p.multiselect({
+      message: opts.message,
+      options: clackOptions as any,
+      required: opts.required,
+      initialValues: opts.options
+        .filter((o) => o.selected)
+        .map((o) => o.value),
+    });
+    return guardCancel(result) as T[];
+  }
+
+  async groupMultiselect<T>(opts: {
+    message: string;
+    options: Record<string, MultiSelectOption<T>[]>;
+    required?: boolean;
+  }): Promise<T[]> {
+    const grouped: Record<string, { value: T; label: string; hint?: string }[]> = {};
+    for (const [group, items] of Object.entries(opts.options)) {
+      grouped[group] = items.map((o) => ({
+        value: o.value as T,
+        label: o.label,
+        hint: o.hint,
+      }));
+    }
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    const result = await p.groupMultiselect({
+      message: opts.message,
+      options: grouped as any,
+      required: opts.required,
+    });
+    return guardCancel(result) as T[];
+  }
+
+  spinner(): ProgressHandle {
+    const s = p.spinner();
+    let started = false;
+    return {
+      update(message: string) {
+        if (!started) {
+          s.start(message);
+          started = true;
+        } else {
+          s.message(message);
+        }
+      },
+      stop(message?: string) {
+        if (started) {
+          s.stop(message);
+          started = false;
+        }
+      },
+    };
+  }
+
+  separator(): void {
+    p.log.info('');
+  }
+}
--- a/src/prompter/headless-prompter.ts
+++ b/src/prompter/headless-prompter.ts
@@ -0,0 +1,133 @@
+import type {
+  WizardPrompter,
+  SelectOption,
+  MultiSelectOption,
+  ProgressHandle,
+} from './interface.js';
+
+export type AnswerValue = string | boolean | string[];
+
+export class HeadlessPrompter implements WizardPrompter {
+  private answers: Map<string, AnswerValue>;
+  private logs: string[] = [];
+
+  constructor(answers: Record<string, AnswerValue> = {}) {
+    this.answers = new Map(Object.entries(answers));
+  }
+
+  intro(message: string): void {
+    this.logs.push(`[intro] ${message}`);
+  }
+  outro(message: string): void {
+    this.logs.push(`[outro] ${message}`);
+  }
+  note(message: string, title?: string): void {
+    this.logs.push(`[note] ${title ?? ''}: ${message}`);
+  }
+  log(message: string): void {
+    this.logs.push(`[log] ${message}`);
+  }
+  warn(message: string): void {
+    this.logs.push(`[warn] ${message}`);
+  }
+
+  async text(opts: {
+    message: string;
+    placeholder?: string;
+    defaultValue?: string;
+    validate?: (value: string) => string | void;
+  }): Promise<string> {
+    const answer = this.answers.get(opts.message);
+    const value =
+      typeof answer === 'string'
+        ? answer
+        : opts.defaultValue !== undefined
+          ? opts.defaultValue
+          : undefined;
+
+    if (value === undefined) {
+      throw new Error(`HeadlessPrompter: no answer for "${opts.message}"`);
+    }
+
+    if (opts.validate) {
+      const error = opts.validate(value);
+      if (error) throw new Error(`HeadlessPrompter validation failed for "${opts.message}": ${error}`);
+    }
+
+    return value;
+  }
+
+  async confirm(opts: {
+    message: string;
+    initialValue?: boolean;
+  }): Promise<boolean> {
+    const answer = this.answers.get(opts.message);
+    if (typeof answer === 'boolean') return answer;
+    return opts.initialValue ?? true;
+  }
+
+  async select<T>(opts: {
+    message: string;
+    options: SelectOption<T>[];
+    initialValue?: T;
+  }): Promise<T> {
+    const answer = this.answers.get(opts.message);
+    if (answer !== undefined) {
+      // Find matching option by value string comparison
+      const match = opts.options.find(
+        (o) => String(o.value) === String(answer),
+      );
+      if (match) return match.value;
+    }
+    if (opts.initialValue !== undefined) return opts.initialValue;
+    if (opts.options.length === 0) {
+      throw new Error(`HeadlessPrompter: no options for "${opts.message}"`);
+    }
+    return opts.options[0].value;
+  }
+
+  async multiselect<T>(opts: {
+    message: string;
+    options: MultiSelectOption<T>[];
+    required?: boolean;
+  }): Promise<T[]> {
+    const answer = this.answers.get(opts.message);
+    if (Array.isArray(answer)) {
+      return opts.options
+        .filter((o) => answer.includes(String(o.value)))
+        .map((o) => o.value);
+    }
+    return opts.options.filter((o) => o.selected).map((o) => o.value);
+  }
+
+  async groupMultiselect<T>(opts: {
+    message: string;
+    options: Record<string, MultiSelectOption<T>[]>;
+    required?: boolean;
+  }): Promise<T[]> {
+    const answer = this.answers.get(opts.message);
+    if (Array.isArray(answer)) {
+      const all = Object.values(opts.options).flat();
+      return all
+        .filter((o) => answer.includes(String(o.value)))
+        .map((o) => o.value);
+    }
+    return Object.values(opts.options)
+      .flat()
+      .filter((o) => o.selected)
+      .map((o) => o.value);
+  }
+
+  spinner(): ProgressHandle {
+    return {
+      update(_message: string) {},
+      stop(_message?: string) {},
+    };
+  }
+
+  separator(): void {}
+
+  getLogs(): string[] {
+    return [...this.logs];
+  }
+}
--- a/src/prompter/interface.ts
+++ b/src/prompter/interface.ts
@@ -0,0 +1,56 @@
+export interface SelectOption<T = string> {
+  value: T;
+  label: string;
+  hint?: string;
+}
+
+export interface MultiSelectOption<T = string> extends SelectOption<T> {
+  selected?: boolean;
+}
+
+export interface ProgressHandle {
+  update(message: string): void;
+  stop(message?: string): void;
+}
+
+export interface WizardPrompter {
+  intro(message: string): void;
+  outro(message: string): void;
+  note(message: string, title?: string): void;
+  log(message: string): void;
+  warn(message: string): void;
+
+  text(opts: {
+    message: string;
+    placeholder?: string;
+    defaultValue?: string;
+    validate?: (value: string) => string | void;
+  }): Promise<string>;
+
+  confirm(opts: {
+    message: string;
+    initialValue?: boolean;
+  }): Promise<boolean>;
+
+  select<T>(opts: {
+    message: string;
+    options: SelectOption<T>[];
+    initialValue?: T;
+  }): Promise<T>;
+
+  multiselect<T>(opts: {
+    message: string;
+    options: MultiSelectOption<T>[];
+    required?: boolean;
+  }): Promise<T[]>;
+
+  groupMultiselect<T>(opts: {
+    message: string;
+    options: Record<string, MultiSelectOption<T>[]>;
+    required?: boolean;
+  }): Promise<T[]>;
+
+  spinner(): ProgressHandle;
+
+  separator(): void;
+}
--- a/src/runtime/detector.ts
+++ b/src/runtime/detector.ts
@@ -0,0 +1,83 @@
+import { execSync } from 'node:child_process';
+import { platform } from 'node:os';
+import type { RuntimeName } from '../types.js';
+
+export interface RuntimeInfo {
+  name: RuntimeName;
+  label: string;
+  installed: boolean;
+  path?: string;
+  version?: string;
+  installHint: string;
+}
+
+const RUNTIME_DEFS: Record<
+  RuntimeName,
+  { label: string; command: string; versionFlag: string; installHint: string }
+> = {
+  claude: {
+    label: 'Claude Code',
+    command: 'claude',
+    versionFlag: '--version',
+    installHint: 'npm install -g @anthropic-ai/claude-code',
+  },
+  codex: {
+    label: 'Codex',
+    command: 'codex',
+    versionFlag: '--version',
+    installHint: 'npm install -g @openai/codex',
+  },
+  opencode: {
+    label: 'OpenCode',
+    command: 'opencode',
+    versionFlag: 'version',
+    installHint: 'See https://opencode.ai for install instructions',
+  },
+};
+
+export function detectRuntime(name: RuntimeName): RuntimeInfo {
+  const def = RUNTIME_DEFS[name];
+  const isWindows = platform() === 'win32';
+  const whichCmd = isWindows
+    ? `where ${def.command} 2>nul`
+    : `which ${def.command} 2>/dev/null`;
+
+  try {
+    const path = execSync(whichCmd, {
+      encoding: 'utf-8',
+      timeout: 5000,
+    })
+      .trim()
+      .split('\n')[0];
+
+    let version: string | undefined;
+    try {
+      version = execSync(`${def.command} ${def.versionFlag} 2>/dev/null`, {
+        encoding: 'utf-8',
+        timeout: 5000,
+      }).trim();
+    } catch {
+      // Version detection is optional
+    }
+
+    return {
+      name,
+      label: def.label,
+      installed: true,
+      path,
+      version,
+      installHint: def.installHint,
+    };
+  } catch {
+    return {
+      name,
+      label: def.label,
+      installed: false,
+      installHint: def.installHint,
+    };
+  }
+}
+
+export function getInstallInstructions(name: RuntimeName): string {
+  return RUNTIME_DEFS[name].installHint;
+}
--- a/src/runtime/installer.ts
+++ b/src/runtime/installer.ts
@@ -0,0 +1,12 @@
+import type { RuntimeName } from '../types.js';
+import { getInstallInstructions } from './detector.js';
+
+export function formatInstallInstructions(name: RuntimeName): string {
+  const hint = getInstallInstructions(name);
+  const labels: Record<RuntimeName, string> = {
+    claude: 'Claude Code',
+    codex: 'Codex',
+    opencode: 'OpenCode',
+  };
+  return `To install ${labels[name]}:\n  ${hint}`;
+}
--- a/src/runtime/mcp-config.ts
+++ b/src/runtime/mcp-config.ts
@@ -0,0 +1,112 @@
+import { readFileSync, writeFileSync, existsSync, mkdirSync } from 'node:fs';
+import { join, dirname } from 'node:path';
+import { homedir } from 'node:os';
+import type { RuntimeName } from '../types.js';
+
+const MCP_ENTRY = {
+  command: 'npx',
+  args: ['-y', '@modelcontextprotocol/server-sequential-thinking'],
+};
+
+export function configureMcpForRuntime(runtime: RuntimeName): void {
+  switch (runtime) {
+    case 'claude':
+      return configureClaudeMcp();
+    case 'codex':
+      return configureCodexMcp();
+    case 'opencode':
+      return configureOpenCodeMcp();
+  }
+}
+
+function ensureDir(filePath: string): void {
+  mkdirSync(dirname(filePath), { recursive: true });
+}
+
+function configureClaudeMcp(): void {
+  const settingsPath = join(homedir(), '.claude', 'settings.json');
+  ensureDir(settingsPath);
+
+  let data: Record<string, unknown> = {};
+  if (existsSync(settingsPath)) {
+    try {
+      data = JSON.parse(readFileSync(settingsPath, 'utf-8'));
+    } catch {
+      // Start fresh if corrupt
+    }
+  }
+
+  if (
+    !data.mcpServers ||
+    typeof data.mcpServers !== 'object' ||
+    Array.isArray(data.mcpServers)
+  ) {
+    data.mcpServers = {};
+  }
+  (data.mcpServers as Record<string, unknown>)['sequential-thinking'] =
+    MCP_ENTRY;
+
+  writeFileSync(
+    settingsPath,
+    JSON.stringify(data, null, 2) + '\n',
+    'utf-8',
+  );
+}
+
+function configureCodexMcp(): void {
+  const configPath = join(homedir(), '.codex', 'config.toml');
+  ensureDir(configPath);
+
+  let content = '';
+  if (existsSync(configPath)) {
+    content = readFileSync(configPath, 'utf-8');
+    // Remove existing sequential-thinking section
+    content = content
+      .replace(
+        /\[mcp_servers\.(sequential-thinking|sequential_thinking)\][\s\S]*?(?=\n\[|$)/g,
+        '',
+      )
+      .trim();
+  }
+
+  content +=
+    '\n\n[mcp_servers.sequential-thinking]\n' +
+    'command = "npx"\n' +
+    'args = ["-y", "@modelcontextprotocol/server-sequential-thinking"]\n';
+
+  writeFileSync(configPath, content, 'utf-8');
+}
+
+function configureOpenCodeMcp(): void {
+  const configPath = join(
+    homedir(),
+    '.config',
+    'opencode',
+    'config.json',
+  );
+  ensureDir(configPath);
+
+  let data: Record<string, unknown> = {};
+  if (existsSync(configPath)) {
+    try {
+      data = JSON.parse(readFileSync(configPath, 'utf-8'));
+    } catch {
+      // Start fresh
+    }
+  }
+
+  if (!data.mcp || typeof data.mcp !== 'object' || Array.isArray(data.mcp)) {
+    data.mcp = {};
+  }
+  (data.mcp as Record<string, unknown>)['sequential-thinking'] = {
+    type: 'local',
+    command: ['npx', '-y', '@modelcontextprotocol/server-sequential-thinking'],
+    enabled: true,
+  };
+
+  writeFileSync(
+    configPath,
+    JSON.stringify(data, null, 2) + '\n',
+    'utf-8',
+  );
+}
--- a/src/skills/catalog.ts
+++ b/src/skills/catalog.ts
@@ -0,0 +1,99 @@
+import { readdirSync, readFileSync, existsSync } from 'node:fs';
+import { join } from 'node:path';
+import { parse as parseYaml } from 'yaml';
+import { RECOMMENDED_SKILLS } from '../constants.js';
+
+export interface SkillEntry {
+  name: string;
+  description: string;
+  version?: string;
+  recommended: boolean;
+  source: 'canonical' | 'local';
+}
+
+export function loadSkillsCatalog(mosaicHome: string): SkillEntry[] {
+  const skills: SkillEntry[] = [];
+
+  // Load canonical skills
+  const canonicalDir = join(mosaicHome, 'skills');
+  if (existsSync(canonicalDir)) {
+    skills.push(...loadSkillsFromDir(canonicalDir, 'canonical'));
+  }
+
+  // Fallback to source repo
+  const sourceDir = join(mosaicHome, 'sources', 'agent-skills', 'skills');
+  if (skills.length === 0 && existsSync(sourceDir)) {
+    skills.push(...loadSkillsFromDir(sourceDir, 'canonical'));
+  }
+
+  // Load local skills
+  const localDir = join(mosaicHome, 'skills-local');
+  if (existsSync(localDir)) {
+    skills.push(...loadSkillsFromDir(localDir, 'local'));
+  }
+
+  return skills.sort((a, b) => a.name.localeCompare(b.name));
+}
+
+function loadSkillsFromDir(
+  dir: string,
+  source: 'canonical' | 'local',
+): SkillEntry[] {
+  const entries: SkillEntry[] = [];
+
+  let dirEntries;
+  try {
+    dirEntries = readdirSync(dir, { withFileTypes: true });
+  } catch {
+    return entries;
+  }
+
+  for (const entry of dirEntries) {
+    if (!entry.isDirectory() || entry.name.startsWith('.')) continue;
+
+    const skillMdPath = join(dir, entry.name, 'SKILL.md');
+    if (!existsSync(skillMdPath)) continue;
+
+    try {
+      const content = readFileSync(skillMdPath, 'utf-8');
+      const frontmatter = parseFrontmatter(content);
+
+      entries.push({
+        name: (frontmatter.name as string) ?? entry.name,
+        description: (frontmatter.description as string) ?? '',
+        version: frontmatter.version as string | undefined,
+        recommended: RECOMMENDED_SKILLS.has(entry.name),
+        source,
+      });
+    } catch {
+      // Skip malformed skills
+      entries.push({
+        name: entry.name,
+        description: '',
+        recommended: RECOMMENDED_SKILLS.has(entry.name),
+        source,
+      });
+    }
+  }
+
+  return entries;
+}
+
+function parseFrontmatter(content: string): Record<string, unknown> {
+  const match = content.match(/^---\n([\s\S]*?)\n---/);
+  if (!match) return {};
+
+  try {
+    return (parseYaml(match[1]) as Record<string, unknown>) ?? {};
+  } catch {
+    // Fallback: simple key-value parsing
+    const result: Record<string, string> = {};
+    for (const line of match[1].split('\n')) {
+      const kv = line.match(/^(\w[\w-]*)\s*:\s*(.+)/);
+      if (kv) {
+        result[kv[1]] = kv[2].replace(/^['"]|['"]$/g, '');
+      }
+    }
+    return result;
+  }
+}
--- a/src/skills/categories.ts
+++ b/src/skills/categories.ts
@@ -0,0 +1,86 @@
+/**
+ * Skill category definitions and mapping.
+ * Skills are assigned to categories by name, with keyword fallback.
+ */
+
+export const SKILL_CATEGORIES: Record<string, string[]> = {
+  'Frontend & UI': [
+    'ai-sdk', 'algorithmic-art', 'antfu', 'canvas-design', 'frontend-design',
+    'next-best-practices', 'nuxt', 'pinia', 'shadcn-ui', 'slidev',
+    'tailwind-design-system', 'theme-factory', 'ui-animation', 'unocss',
+    'vercel-composition-patterns', 'vercel-react-best-practices',
+    'vercel-react-native-skills', 'vue', 'vue-best-practices',
+    'vue-router-best-practices', 'vueuse-functions', 'web-artifacts-builder',
+    'web-design-guidelines', 'vite', 'vitepress',
+  ],
+  'Backend & Infrastructure': [
+    'architecture-patterns', 'fastapi', 'mcp-builder', 'nestjs-best-practices',
+    'python-performance-optimization', 'tsdown', 'turborepo', 'pnpm',
+    'dispatching-parallel-agents', 'subagent-driven-development', 'create-agent',
+    'proactive-agent', 'using-superpowers', 'kickstart', 'executing-plans',
+  ],
+  'Testing & Quality': [
+    'code-review-excellence', 'lint', 'pr-reviewer', 'receiving-code-review',
+    'requesting-code-review', 'systematic-debugging', 'test-driven-development',
+    'verification-before-completion', 'vitest', 'vue-testing-best-practices',
+    'webapp-testing',
+  ],
+  'Marketing & Growth': [
+    'ab-test-setup', 'analytics-tracking', 'competitor-alternatives',
+    'copy-editing', 'copywriting', 'email-sequence', 'form-cro',
+    'free-tool-strategy', 'launch-strategy', 'marketing-ideas',
+    'marketing-psychology', 'onboarding-cro', 'page-cro', 'paid-ads',
+    'paywall-upgrade-cro', 'popup-cro', 'pricing-strategy',
+    'product-marketing-context', 'programmatic-seo', 'referral-program',
+    'schema-markup', 'seo-audit', 'signup-flow-cro', 'social-content',
+  ],
+  'Product & Strategy': [
+    'brainstorming', 'brand-guidelines', 'content-strategy',
+    'writing-plans', 'skill-creator', 'writing-skills', 'prd',
+  ],
+  'Developer Practices': [
+    'finishing-a-development-branch', 'using-git-worktrees',
+  ],
+  'Auth & Security': [
+    'better-auth-best-practices', 'create-auth-skill',
+    'email-and-password-best-practices', 'organization-best-practices',
+    'two-factor-authentication-best-practices',
+  ],
+  'Content & Documentation': [
+    'doc-coauthoring', 'docx', 'internal-comms', 'pdf', 'pptx',
+    'slack-gif-creator', 'xlsx',
+  ],
+};
+
+// Reverse lookup: skill name -> category
+const SKILL_TO_CATEGORY = new Map<string, string>();
+for (const [category, skills] of Object.entries(SKILL_CATEGORIES)) {
+  for (const skill of skills) {
+    SKILL_TO_CATEGORY.set(skill, category);
+  }
+}
+
+export function categorizeSkill(name: string, description: string): string {
+  const mapped = SKILL_TO_CATEGORY.get(name);
+  if (mapped) return mapped;
+  return inferCategoryFromDescription(description);
+}
+
+function inferCategoryFromDescription(desc: string): string {
+  const lower = desc.toLowerCase();
+  if (/\b(react|vue|css|frontend|ui|component|tailwind|design)\b/.test(lower))
+    return 'Frontend & UI';
+  if (/\b(api|backend|server|docker|infra|deploy)\b/.test(lower))
+    return 'Backend & Infrastructure';
+  if (/\b(test|lint|review|debug|quality)\b/.test(lower))
+    return 'Testing & Quality';
+  if (/\b(marketing|seo|copy|ads|cro|conversion|email)\b/.test(lower))
+    return 'Marketing & Growth';
+  if (/\b(auth|security|2fa|password|credential)\b/.test(lower))
+    return 'Auth & Security';
+  if (/\b(doc|pdf|word|sheet|writing|comms)\b/.test(lower))
+    return 'Content & Documentation';
+  if (/\b(product|strategy|brainstorm|plan|prd)\b/.test(lower))
+    return 'Product & Strategy';
+  return 'Developer Practices';
+}
--- a/src/stages/detect-install.ts
+++ b/src/stages/detect-install.ts
@@ -0,0 +1,95 @@
+import { existsSync, readFileSync } from 'node:fs';
+import { join } from 'node:path';
+import type { WizardPrompter } from '../prompter/interface.js';
+import type { ConfigService } from '../config/config-service.js';
+import type { WizardState, InstallAction } from '../types.js';
+
+function detectExistingInstall(mosaicHome: string): boolean {
+  if (!existsSync(mosaicHome)) return false;
+  return (
+    existsSync(join(mosaicHome, 'bin/mosaic')) ||
+    existsSync(join(mosaicHome, 'AGENTS.md')) ||
+    existsSync(join(mosaicHome, 'SOUL.md'))
+  );
+}
+
+function detectExistingIdentity(mosaicHome: string): {
+  hasSoul: boolean;
+  hasUser: boolean;
+  hasTools: boolean;
+  agentName?: string;
+} {
+  const soulPath = join(mosaicHome, 'SOUL.md');
+  const hasSoul = existsSync(soulPath);
+  let agentName: string | undefined;
+
+  if (hasSoul) {
+    try {
+      const content = readFileSync(soulPath, 'utf-8');
+      const match = content.match(/You are \*\*(.+?)\*\*/);
+      agentName = match?.[1];
+    } catch {
+      // Non-fatal
+    }
+  }
+
+  return {
+    hasSoul,
+    hasUser: existsSync(join(mosaicHome, 'USER.md')),
+    hasTools: existsSync(join(mosaicHome, 'TOOLS.md')),
+    agentName,
+  };
+}
+
+export async function detectInstallStage(
+  p: WizardPrompter,
+  state: WizardState,
+  config: ConfigService,
+): Promise<void> {
+  const existing = detectExistingInstall(state.mosaicHome);
+  if (!existing) {
+    state.installAction = 'fresh';
+    return;
+  }
+
+  const identity = detectExistingIdentity(state.mosaicHome);
+  const identitySummary = identity.agentName
+    ? `Agent: ${identity.agentName}`
+    : 'No identity configured';
+
+  p.note(
+    `Found existing Mosaic installation at:\n${state.mosaicHome}\n\n` +
+      `${identitySummary}\n` +
+      `SOUL.md: ${identity.hasSoul ? 'yes' : 'no'}\n` +
+      `USER.md: ${identity.hasUser ? 'yes' : 'no'}\n` +
+      `TOOLS.md: ${identity.hasTools ? 'yes' : 'no'}`,
+    'Existing Installation Detected',
+  );
+
+  state.installAction = await p.select<InstallAction>({
+    message: 'What would you like to do?',
+    options: [
+      {
+        value: 'keep',
+        label: 'Keep identity, update framework',
+        hint: 'Preserves SOUL.md, USER.md, TOOLS.md, memory/',
+      },
+      {
+        value: 'reconfigure',
+        label: 'Reconfigure identity',
+        hint: 'Re-run identity setup, update framework',
+      },
+      {
+        value: 'reset',
+        label: 'Fresh install',
+        hint: 'Replace everything',
+      },
+    ],
+  });
+
+  if (state.installAction === 'keep') {
+    state.soul = await config.readSoul();
+    state.user = await config.readUser();
+    state.tools = await config.readTools();
+  }
+}
--- a/src/stages/finalize.ts
+++ b/src/stages/finalize.ts
@@ -0,0 +1,177 @@
+import { spawnSync } from 'node:child_process';
+import { existsSync, readFileSync, appendFileSync } from 'node:fs';
+import { join } from 'node:path';
+import { platform } from 'node:os';
+import type { WizardPrompter } from '../prompter/interface.js';
+import type { ConfigService } from '../config/config-service.js';
+import type { WizardState } from '../types.js';
+import { getShellProfilePath } from '../platform/detect.js';
+
+function linkRuntimeAssets(mosaicHome: string): void {
+  const script = join(mosaicHome, 'bin', 'mosaic-link-runtime-assets');
+  if (existsSync(script)) {
+    try {
+      spawnSync('bash', [script], { timeout: 30000, stdio: 'pipe' });
+    } catch {
+      // Non-fatal: wizard continues
+    }
+  }
+}
+
+function syncSkills(mosaicHome: string): void {
+  const script = join(mosaicHome, 'bin', 'mosaic-sync-skills');
+  if (existsSync(script)) {
+    try {
+      spawnSync('bash', [script], { timeout: 60000, stdio: 'pipe' });
+    } catch {
+      // Non-fatal
+    }
+  }
+}
+
+interface DoctorResult {
+  warnings: number;
+  output: string;
+}
+
+function runDoctor(mosaicHome: string): DoctorResult {
+  const script = join(mosaicHome, 'bin', 'mosaic-doctor');
+  if (!existsSync(script)) {
+    return { warnings: 0, output: 'mosaic-doctor not found' };
+  }
+
+  try {
+    const result = spawnSync('bash', [script], {
+      timeout: 30000,
+      encoding: 'utf-8',
+      stdio: 'pipe',
+    });
+    const output = result.stdout ?? '';
+    const warnings = (output.match(/WARN/g) ?? []).length;
+    return { warnings, output };
+  } catch {
+    return { warnings: 1, output: 'Doctor check failed' };
+  }
+}
+
+type PathAction = 'already' | 'added' | 'skipped';
+
+function setupPath(
+  mosaicHome: string,
+  p: WizardPrompter,
+): PathAction {
+  const binDir = join(mosaicHome, 'bin');
+  const currentPath = process.env.PATH ?? '';
+
+  if (currentPath.includes(binDir)) {
+    return 'already';
+  }
+
+  const profilePath = getShellProfilePath();
+  if (!profilePath) return 'skipped';
+
+  const isWindows = platform() === 'win32';
+  const exportLine = isWindows
+    ? `\n# Mosaic\n$env:Path = "${binDir};$env:Path"\n`
+    : `\n# Mosaic\nexport PATH="${binDir}:$PATH"\n`;
+
+  // Check if already in profile
+  if (existsSync(profilePath)) {
+    const content = readFileSync(profilePath, 'utf-8');
+    if (content.includes(binDir)) {
+      return 'already';
+    }
+  }
+
+  try {
+    appendFileSync(profilePath, exportLine, 'utf-8');
+    return 'added';
+  } catch {
+    return 'skipped';
+  }
+}
+
+export async function finalizeStage(
+  p: WizardPrompter,
+  state: WizardState,
+  config: ConfigService,
+): Promise<void> {
+  p.separator();
+
+  const spin = p.spinner();
+
+  // 1. Sync framework files (before config writes so identity files aren't overwritten)
+  spin.update('Syncing framework files...');
+  await config.syncFramework(state.installAction);
+
+  // 2. Write config files (after sync so they aren't overwritten by source templates)
+  if (state.installAction !== 'keep') {
+    spin.update('Writing configuration files...');
+    await config.writeSoul(state.soul);
+    await config.writeUser(state.user);
+    await config.writeTools(state.tools);
+  }
+
+  // 3. Link runtime assets
+  spin.update('Linking runtime assets...');
+  linkRuntimeAssets(state.mosaicHome);
+
+  // 4. Sync skills
+  if (state.selectedSkills.length > 0) {
+    spin.update('Syncing skills...');
+    syncSkills(state.mosaicHome);
+  }
+
+  // 5. Run doctor
+  spin.update('Running health audit...');
+  const doctorResult = runDoctor(state.mosaicHome);
+
+  spin.stop('Installation complete');
+
+  // 6. PATH setup
+  const pathAction = setupPath(state.mosaicHome, p);
+
+  // 7. Summary
+  const summary: string[] = [
+    `Agent: ${state.soul.agentName ?? 'Assistant'}`,
+    `Style: ${state.soul.communicationStyle ?? 'direct'}`,
+    `Runtimes: ${state.runtimes.detected.join(', ') || 'none detected'}`,
+    `Skills: ${state.selectedSkills.length} selected`,
+    `Config: ${state.mosaicHome}`,
+  ];
+
+  if (doctorResult.warnings > 0) {
+    summary.push(
+      `Health: ${doctorResult.warnings} warning(s) — run 'mosaic doctor' for details`,
+    );
+  } else {
+    summary.push('Health: all checks passed');
+  }
+
+  p.note(summary.join('\n'), 'Installation Summary');
+
+  // 8. Next steps
+  const nextSteps: string[] = [];
+  if (pathAction === 'added') {
+    const profilePath = getShellProfilePath();
+    nextSteps.push(
+      `Reload shell: source ${profilePath ?? '~/.profile'}`,
+    );
+  }
+  if (state.runtimes.detected.length === 0) {
+    nextSteps.push(
+      'Install at least one runtime (claude, codex, or opencode)',
+    );
+  }
+  nextSteps.push("Launch with 'mosaic claude' (or codex/opencode)");
+  nextSteps.push(
+    'Edit identity files directly in ~/.config/mosaic/ for fine-tuning',
+  );
+
+  p.note(
+    nextSteps.map((s, i) => `${i + 1}. ${s}`).join('\n'),
+    'Next Steps',
+  );
+
+  p.outro('Mosaic is ready.');
+}
--- a/src/stages/mode-select.ts
+++ b/src/stages/mode-select.ts
@@ -0,0 +1,23 @@
+import type { WizardPrompter } from '../prompter/interface.js';
+import type { WizardState, WizardMode } from '../types.js';
+
+export async function modeSelectStage(
+  p: WizardPrompter,
+  state: WizardState,
+): Promise<void> {
+  state.mode = await p.select<WizardMode>({
+    message: 'Installation mode',
+    options: [
+      {
+        value: 'quick',
+        label: 'Quick Start',
+        hint: 'Sensible defaults, minimal questions (~2 min)',
+      },
+      {
+        value: 'advanced',
+        label: 'Advanced',
+        hint: 'Full customization of identity, runtimes, and skills',
+      },
+    ],
+  });
+}
--- a/src/stages/runtime-setup.ts
+++ b/src/stages/runtime-setup.ts
@@ -0,0 +1,70 @@
+import type { WizardPrompter } from '../prompter/interface.js';
+import type { WizardState, RuntimeName } from '../types.js';
+import { detectRuntime, type RuntimeInfo } from '../runtime/detector.js';
+import { formatInstallInstructions } from '../runtime/installer.js';
+import { configureMcpForRuntime } from '../runtime/mcp-config.js';
+
+const RUNTIME_NAMES: RuntimeName[] = ['claude', 'codex', 'opencode'];
+
+export async function runtimeSetupStage(
+  p: WizardPrompter,
+  state: WizardState,
+): Promise<void> {
+  p.separator();
+
+  const spin = p.spinner();
+  spin.update('Detecting installed runtimes...');
+
+  const runtimes: RuntimeInfo[] = RUNTIME_NAMES.map(detectRuntime);
+
+  spin.stop('Runtime detection complete');
+
+  const detected = runtimes.filter((r) => r.installed);
+  const notDetected = runtimes.filter((r) => !r.installed);
+
+  if (detected.length > 0) {
+    const summary = detected
+      .map(
+        (r) =>
+          `  ${r.label}: ${r.version ?? 'installed'} (${r.path})`,
+      )
+      .join('\n');
+    p.note(summary, 'Detected Runtimes');
+  } else {
+    p.warn('No runtimes detected. Install at least one to use Mosaic.');
+  }
+
+  state.runtimes.detected = detected.map((r) => r.name);
+
+  // Offer installation info for missing runtimes in advanced mode
+  if (state.mode === 'advanced' && notDetected.length > 0) {
+    const showInstall = await p.confirm({
+      message: `${notDetected.length} runtime(s) not found. Show install instructions?`,
+      initialValue: false,
+    });
+
+    if (showInstall) {
+      for (const rt of notDetected) {
+        p.note(formatInstallInstructions(rt.name), `Install ${rt.label}`);
+      }
+    }
+  }
+
+  // Configure MCP sequential-thinking for detected runtimes
+  if (detected.length > 0) {
+    const spin2 = p.spinner();
+    spin2.update('Configuring sequential-thinking MCP...');
+    try {
+      for (const rt of detected) {
+        configureMcpForRuntime(rt.name);
+      }
+      spin2.stop('MCP sequential-thinking configured');
+      state.runtimes.mcpConfigured = true;
+    } catch (err) {
+      spin2.stop('MCP configuration failed (non-fatal)');
+      p.warn(
+        `MCP setup failed: ${err instanceof Error ? err.message : String(err)}. Run 'mosaic seq fix' later.`,
+      );
+    }
+  }
+}
--- a/src/stages/skills-select.ts
+++ b/src/stages/skills-select.ts
@@ -0,0 +1,84 @@
+import type { WizardPrompter } from '../prompter/interface.js';
+import type { WizardState } from '../types.js';
+import { loadSkillsCatalog } from '../skills/catalog.js';
+import { SKILL_CATEGORIES, categorizeSkill } from '../skills/categories.js';
+
+function truncate(str: string, max: number): string {
+  if (str.length <= max) return str;
+  return str.slice(0, max - 1) + '\u2026';
+}
+
+export async function skillsSelectStage(
+  p: WizardPrompter,
+  state: WizardState,
+): Promise<void> {
+  p.separator();
+
+  const spin = p.spinner();
+  spin.update('Loading skills catalog...');
+
+  const catalog = loadSkillsCatalog(state.mosaicHome);
+  spin.stop(`Found ${catalog.length} available skills`);
+
+  if (catalog.length === 0) {
+    p.warn(
+      "No skills found. Run 'mosaic sync' after installation to fetch skills.",
+    );
+    state.selectedSkills = [];
+    return;
+  }
+
+  if (state.mode === 'quick') {
+    const defaults = catalog
+      .filter((s) => s.recommended)
+      .map((s) => s.name);
+    state.selectedSkills = defaults;
+    p.note(
+      `Selected ${defaults.length} recommended skills.\n` +
+        `Run 'mosaic sync' later to browse the full catalog.`,
+      'Skills',
+    );
+    return;
+  }
+
+  // Advanced mode: categorized browsing
+  p.note(
+    'Skills give agents domain expertise for specific tasks.\n' +
+      'Browse by category and select the ones you want.\n' +
+      "You can always change this later with 'mosaic sync'.",
+    'Skills Selection',
+  );
+
+  // Build grouped options
+  const grouped: Record<
+    string,
+    { value: string; label: string; hint?: string; selected?: boolean }[]
+  > = {};
+
+  // Initialize all categories
+  for (const categoryName of Object.keys(SKILL_CATEGORIES)) {
+    grouped[categoryName] = [];
+  }
+
+  for (const skill of catalog) {
+    const category = categorizeSkill(skill.name, skill.description);
+    if (!grouped[category]) grouped[category] = [];
+    grouped[category].push({
+      value: skill.name,
+      label: skill.name,
+      hint: truncate(skill.description, 60),
+      selected: skill.recommended,
+    });
+  }
+
+  // Remove empty categories
+  for (const key of Object.keys(grouped)) {
+    if (grouped[key].length === 0) delete grouped[key];
+  }
+
+  state.selectedSkills = await p.groupMultiselect({
+    message: 'Select skills (space to toggle)',
+    options: grouped,
+    required: false,
+  });
+}
--- a/src/stages/soul-setup.ts
+++ b/src/stages/soul-setup.ts
@@ -0,0 +1,73 @@
+import type { WizardPrompter } from '../prompter/interface.js';
+import type { WizardState, CommunicationStyle } from '../types.js';
+import { DEFAULTS } from '../constants.js';
+
+export async function soulSetupStage(
+  p: WizardPrompter,
+  state: WizardState,
+): Promise<void> {
+  if (state.installAction === 'keep') return;
+
+  p.separator();
+  p.note(
+    'Your agent identity defines how AI assistants behave,\n' +
+      'their principles, and communication style.\n' +
+      'This creates SOUL.md.',
+    'Agent Identity',
+  );
+
+  if (!state.soul.agentName) {
+    state.soul.agentName = await p.text({
+      message: 'What name should agents use?',
+      placeholder: 'e.g., Jarvis, Assistant, Mosaic',
+      defaultValue: DEFAULTS.agentName,
+      validate: (v) => {
+        if (v.length === 0) return 'Name cannot be empty';
+        if (v.length > 50) return 'Name must be under 50 characters';
+      },
+    });
+  }
+
+  if (state.mode === 'advanced') {
+    if (!state.soul.roleDescription) {
+      state.soul.roleDescription = await p.text({
+        message: 'Agent role description',
+        placeholder: 'e.g., execution partner and visibility engine',
+        defaultValue: DEFAULTS.roleDescription,
+      });
+    }
+  } else {
+    state.soul.roleDescription ??= DEFAULTS.roleDescription;
+  }
+
+  if (!state.soul.communicationStyle) {
+    state.soul.communicationStyle = await p.select<CommunicationStyle>({
+      message: 'Communication style',
+      options: [
+        { value: 'direct', label: 'Direct', hint: 'Concise, no fluff, actionable' },
+        { value: 'friendly', label: 'Friendly', hint: 'Warm but efficient, conversational' },
+        { value: 'formal', label: 'Formal', hint: 'Professional, structured, thorough' },
+      ],
+      initialValue: 'direct',
+    });
+  }
+
+  if (state.mode === 'advanced') {
+    if (!state.soul.accessibility) {
+      state.soul.accessibility = await p.text({
+        message: 'Accessibility preferences',
+        placeholder:
+          "e.g., ADHD-friendly chunking, dyslexia-aware formatting, or 'none'",
+        defaultValue: 'none',
+      });
+    }
+
+    if (!state.soul.customGuardrails) {
+      state.soul.customGuardrails = await p.text({
+        message: 'Custom guardrails (optional)',
+        placeholder: 'e.g., Never auto-commit to main',
+        defaultValue: '',
+      });
+    }
+  }
+}
--- a/src/stages/tools-setup.ts
+++ b/src/stages/tools-setup.ts
@@ -0,0 +1,76 @@
+import type { WizardPrompter } from '../prompter/interface.js';
+import type { WizardState, GitProvider } from '../types.js';
+import { DEFAULTS } from '../constants.js';
+
+export async function toolsSetupStage(
+  p: WizardPrompter,
+  state: WizardState,
+): Promise<void> {
+  if (state.installAction === 'keep') return;
+
+  if (state.mode === 'quick') {
+    state.tools.gitProviders = [];
+    state.tools.credentialsLocation = DEFAULTS.credentialsLocation;
+    state.tools.customToolsSection = DEFAULTS.customToolsSection;
+    return;
+  }
+
+  p.separator();
+  p.note(
+    'Tool configuration tells agents about your git providers,\n' +
+      'credential locations, and custom tools.\n' +
+      'This creates TOOLS.md.',
+    'Tool Reference',
+  );
+
+  const addProviders = await p.confirm({
+    message: 'Configure git providers?',
+    initialValue: false,
+  });
+
+  state.tools.gitProviders = [];
+  if (addProviders) {
+    let addMore = true;
+    while (addMore) {
+      const name = await p.text({
+        message: 'Provider name',
+        placeholder: 'e.g., Gitea, GitHub',
+      });
+      const url = await p.text({
+        message: 'Provider URL',
+        placeholder: 'e.g., https://github.com',
+      });
+      const cli = await p.select<string>({
+        message: 'CLI tool',
+        options: [
+          { value: 'gh', label: 'gh (GitHub CLI)' },
+          { value: 'tea', label: 'tea (Gitea CLI)' },
+          { value: 'glab', label: 'glab (GitLab CLI)' },
+        ],
+      });
+      const purpose = await p.text({
+        message: 'Purpose',
+        placeholder: 'e.g., Primary code hosting',
+        defaultValue: 'Code hosting',
+      });
+
+      state.tools.gitProviders.push({
+        name,
+        url,
+        cli,
+        purpose,
+      } satisfies GitProvider);
+
+      addMore = await p.confirm({
+        message: 'Add another provider?',
+        initialValue: false,
+      });
+    }
+  }
+
+  state.tools.credentialsLocation = await p.text({
+    message: 'Credential file path',
+    placeholder: "e.g., ~/.secrets/credentials.env, or 'none'",
+    defaultValue: DEFAULTS.credentialsLocation,
+  });
+}
--- a/src/stages/user-setup.ts
+++ b/src/stages/user-setup.ts
@@ -0,0 +1,80 @@
+import type { WizardPrompter } from '../prompter/interface.js';
+import type { WizardState } from '../types.js';
+import { DEFAULTS } from '../constants.js';
+import { buildCommunicationPrefs } from '../template/builders.js';
+
+export async function userSetupStage(
+  p: WizardPrompter,
+  state: WizardState,
+): Promise<void> {
+  if (state.installAction === 'keep') return;
+
+  p.separator();
+  p.note(
+    'Your user profile helps agents understand your context,\n' +
+      'accessibility needs, and communication preferences.\n' +
+      'This creates USER.md.',
+    'User Profile',
+  );
+
+  if (!state.user.userName) {
+    state.user.userName = await p.text({
+      message: 'Your name',
+      placeholder: 'How agents should address you',
+      defaultValue: '',
+    });
+  }
+
+  if (!state.user.pronouns) {
+    state.user.pronouns = await p.text({
+      message: 'Your pronouns',
+      placeholder: 'e.g., He/Him, She/Her, They/Them',
+      defaultValue: DEFAULTS.pronouns,
+    });
+  }
+
+  // Auto-detect timezone
+  let detectedTz: string;
+  try {
+    detectedTz = Intl.DateTimeFormat().resolvedOptions().timeZone;
+  } catch {
+    detectedTz = DEFAULTS.timezone;
+  }
+
+  if (!state.user.timezone) {
+    state.user.timezone = await p.text({
+      message: 'Your timezone',
+      placeholder: `e.g., ${detectedTz}`,
+      defaultValue: detectedTz,
+    });
+  }
+
+  if (state.mode === 'advanced') {
+    state.user.background = await p.text({
+      message: 'Professional background (brief)',
+      placeholder: 'e.g., Full-stack developer, 10 years TypeScript/React',
+      defaultValue: DEFAULTS.background,
+    });
+
+    state.user.accessibilitySection = await p.text({
+      message: 'Neurodivergence / accessibility accommodations',
+      placeholder: 'e.g., ADHD-friendly chunking, or press Enter to skip',
+      defaultValue: DEFAULTS.accessibilitySection,
+    });
+
+    state.user.personalBoundaries = await p.text({
+      message: 'Personal boundaries for agents',
+      placeholder: 'e.g., No unsolicited career advice, or press Enter to skip',
+      defaultValue: DEFAULTS.personalBoundaries,
+    });
+  } else {
+    state.user.background = DEFAULTS.background;
+    state.user.accessibilitySection = DEFAULTS.accessibilitySection;
+    state.user.personalBoundaries = DEFAULTS.personalBoundaries;
+  }
+
+  // Derive communication preferences from SOUL style
+  state.user.communicationPrefs = buildCommunicationPrefs(
+    state.soul.communicationStyle ?? 'direct',
+  );
+}
--- a/src/stages/welcome.ts
+++ b/src/stages/welcome.ts
@@ -0,0 +1,18 @@
+import type { WizardPrompter } from '../prompter/interface.js';
+import type { WizardState } from '../types.js';
+import { VERSION } from '../constants.js';
+
+export async function welcomeStage(
+  p: WizardPrompter,
+  _state: WizardState,
+): Promise<void> {
+  p.intro(`Mosaic Installation Wizard v${VERSION}`);
+  p.note(
+    `Mosaic is an agent framework that gives AI coding assistants\n` +
+      `a persistent identity, shared skills, and structured workflows.\n\n` +
+      `It works with Claude Code, Codex, and OpenCode.\n\n` +
+      `All config is stored locally in ~/.config/mosaic/.\n` +
+      `No data is sent anywhere. No accounts required.`,
+    'What is Mosaic?',
+  );
+}
--- a/src/template/builders.ts
+++ b/src/template/builders.ts
@@ -0,0 +1,145 @@
+import type { CommunicationStyle, SoulConfig, UserConfig, ToolsConfig, GitProvider } from '../types.js';
+import { DEFAULTS } from '../constants.js';
+import type { TemplateVars } from './engine.js';
+
+/**
+ * Build behavioral principles text based on communication style.
+ * Replicates mosaic-init lines 177-204 exactly.
+ */
+function buildBehavioralPrinciples(
+  style: CommunicationStyle,
+  accessibility?: string,
+): string {
+  let principles: string;
+
+  switch (style) {
+    case 'direct':
+      principles = `1. Clarity over performance theater.
+2. Practical execution over abstract planning.
+3. Truthfulness over confidence: state uncertainty explicitly.
+4. Visible state over hidden assumptions.
+5. Accessibility-aware — see \`~/.config/mosaic/USER.md\` for user-specific accommodations.`;
+      break;
+    case 'friendly':
+      principles = `1. Be helpful and approachable while staying efficient.
+2. Provide context and explain reasoning when helpful.
+3. Truthfulness over confidence: state uncertainty explicitly.
+4. Visible state over hidden assumptions.
+5. Accessibility-aware — see \`~/.config/mosaic/USER.md\` for user-specific accommodations.`;
+      break;
+    case 'formal':
+      principles = `1. Maintain professional, structured communication.
+2. Provide thorough analysis with explicit tradeoffs.
+3. Truthfulness over confidence: state uncertainty explicitly.
+4. Document decisions and rationale clearly.
+5. Accessibility-aware — see \`~/.config/mosaic/USER.md\` for user-specific accommodations.`;
+      break;
+  }
+
+  if (accessibility && accessibility !== 'none' && accessibility.length > 0) {
+    principles += `\n6. ${accessibility}.`;
+  }
+
+  return principles;
+}
+
+/**
+ * Build communication style text based on style choice.
+ * Replicates mosaic-init lines 208-227 exactly.
+ */
+function buildCommunicationStyleText(style: CommunicationStyle): string {
+  switch (style) {
+    case 'direct':
+      return `- Be direct, concise, and concrete.
+- Avoid fluff, hype, and anthropomorphic roleplay.
+- Do not simulate certainty when facts are missing.
+- Prefer actionable next steps and explicit tradeoffs.`;
+    case 'friendly':
+      return `- Be warm and conversational while staying focused.
+- Explain your reasoning when it helps the user.
+- Do not simulate certainty when facts are missing.
+- Prefer actionable next steps with clear context.`;
+    case 'formal':
+      return `- Use professional, structured language.
+- Provide thorough explanations with supporting detail.
+- Do not simulate certainty when facts are missing.
+- Present options with explicit tradeoffs and recommendations.`;
+  }
+}
+
+/**
+ * Build communication preferences for USER.md based on style.
+ * Replicates mosaic-init lines 299-316 exactly.
+ */
+function buildCommunicationPrefs(style: CommunicationStyle): string {
+  switch (style) {
+    case 'direct':
+      return `- Direct and concise
+- No sycophancy
+- Executive summaries and tables for overview`;
+    case 'friendly':
+      return `- Warm and conversational
+- Explain reasoning when helpful
+- Balance thoroughness with brevity`;
+    case 'formal':
+      return `- Professional and structured
+- Thorough explanations with supporting detail
+- Formal tone with explicit recommendations`;
+  }
+}
+
+/**
+ * Build git providers markdown table from provider list.
+ * Replicates mosaic-init lines 362-384.
+ */
+function buildGitProvidersTable(providers?: GitProvider[]): string {
+  if (!providers || providers.length === 0) {
+    return DEFAULTS.gitProvidersTable;
+  }
+
+  const rows = providers
+    .map((p) => `| ${p.name} | ${p.url} | \`${p.cli}\` | ${p.purpose} |`)
+    .join('\n');
+
+  return `| Instance | URL | CLI | Purpose |
+|----------|-----|-----|---------|
+${rows}`;
+}
+
+export function buildSoulTemplateVars(config: SoulConfig): TemplateVars {
+  const style = config.communicationStyle ?? 'direct';
+  const guardrails = config.customGuardrails
+    ? `- ${config.customGuardrails}`
+    : '';
+
+  return {
+    AGENT_NAME: config.agentName ?? DEFAULTS.agentName,
+    ROLE_DESCRIPTION: config.roleDescription ?? DEFAULTS.roleDescription,
+    BEHAVIORAL_PRINCIPLES: buildBehavioralPrinciples(style, config.accessibility),
+    COMMUNICATION_STYLE: buildCommunicationStyleText(style),
+    CUSTOM_GUARDRAILS: guardrails,
+  };
+}
+
+export function buildUserTemplateVars(config: UserConfig): TemplateVars {
+  return {
+    USER_NAME: config.userName ?? '',
+    PRONOUNS: config.pronouns ?? DEFAULTS.pronouns,
+    TIMEZONE: config.timezone ?? DEFAULTS.timezone,
+    BACKGROUND: config.background ?? DEFAULTS.background,
+    ACCESSIBILITY_SECTION: config.accessibilitySection ?? DEFAULTS.accessibilitySection,
+    COMMUNICATION_PREFS: config.communicationPrefs ?? buildCommunicationPrefs('direct'),
+    PERSONAL_BOUNDARIES: config.personalBoundaries ?? DEFAULTS.personalBoundaries,
+    PROJECTS_TABLE: config.projectsTable ?? DEFAULTS.projectsTable,
+  };
+}
+
+export function buildToolsTemplateVars(config: ToolsConfig): TemplateVars {
+  return {
+    GIT_PROVIDERS_TABLE: buildGitProvidersTable(config.gitProviders),
+    CREDENTIALS_LOCATION: config.credentialsLocation ?? DEFAULTS.credentialsLocation,
+    CUSTOM_TOOLS_SECTION: config.customToolsSection ?? DEFAULTS.customToolsSection,
+  };
+}
+
+export { buildCommunicationPrefs };
--- a/src/template/engine.ts
+++ b/src/template/engine.ts
@@ -0,0 +1,26 @@
+export interface TemplateVars {
+  [key: string]: string;
+}
+
+/**
+ * Replaces {{PLACEHOLDER}} tokens with provided values.
+ * Does NOT expand ${ENV_VAR} syntax — those pass through for shell resolution.
+ */
+export function renderTemplate(
+  template: string,
+  vars: TemplateVars,
+  options: { strict?: boolean } = {},
+): string {
+  return template.replace(
+    /\{\{([A-Z_][A-Z0-9_]*)\}\}/g,
+    (match, varName: string) => {
+      if (varName in vars) {
+        return vars[varName];
+      }
+      if (options.strict) {
+        throw new Error(`Template variable not provided: {{${varName}}}`);
+      }
+      return '';
+    },
+  );
+}
--- a/src/types.ts
+++ b/src/types.ts
@@ -0,0 +1,53 @@
+export type WizardMode = 'quick' | 'advanced';
+export type InstallAction = 'fresh' | 'keep' | 'reconfigure' | 'reset';
+export type CommunicationStyle = 'direct' | 'friendly' | 'formal';
+export type RuntimeName = 'claude' | 'codex' | 'opencode';
+
+export interface SoulConfig {
+  agentName?: string;
+  roleDescription?: string;
+  communicationStyle?: CommunicationStyle;
+  accessibility?: string;
+  customGuardrails?: string;
+}
+
+export interface UserConfig {
+  userName?: string;
+  pronouns?: string;
+  timezone?: string;
+  background?: string;
+  accessibilitySection?: string;
+  communicationPrefs?: string;
+  personalBoundaries?: string;
+  projectsTable?: string;
+}
+
+export interface GitProvider {
+  name: string;
+  url: string;
+  cli: string;
+  purpose: string;
+}
+
+export interface ToolsConfig {
+  gitProviders?: GitProvider[];
+  credentialsLocation?: string;
+  customToolsSection?: string;
+}
+
+export interface RuntimeState {
+  detected: RuntimeName[];
+  mcpConfigured: boolean;
+}
+
+export interface WizardState {
+  mosaicHome: string;
+  sourceDir: string;
+  mode: WizardMode;
+  installAction: InstallAction;
+  soul: SoulConfig;
+  user: UserConfig;
+  tools: ToolsConfig;
+  runtimes: RuntimeState;
+  selectedSkills: string[];
+}
--- a/src/wizard.ts
+++ b/src/wizard.ts
@@ -0,0 +1,96 @@
+import type { WizardPrompter } from './prompter/interface.js';
+import type { ConfigService } from './config/config-service.js';
+import type { WizardState } from './types.js';
+import { welcomeStage } from './stages/welcome.js';
+import { detectInstallStage } from './stages/detect-install.js';
+import { modeSelectStage } from './stages/mode-select.js';
+import { soulSetupStage } from './stages/soul-setup.js';
+import { userSetupStage } from './stages/user-setup.js';
+import { toolsSetupStage } from './stages/tools-setup.js';
+import { runtimeSetupStage } from './stages/runtime-setup.js';
+import { skillsSelectStage } from './stages/skills-select.js';
+import { finalizeStage } from './stages/finalize.js';
+
+export interface WizardOptions {
+  mosaicHome: string;
+  sourceDir: string;
+  prompter: WizardPrompter;
+  configService: ConfigService;
+  cliOverrides?: Partial<WizardState>;
+}
+
+export async function runWizard(options: WizardOptions): Promise<void> {
+  const { prompter, configService, mosaicHome, sourceDir } = options;
+
+  const state: WizardState = {
+    mosaicHome,
+    sourceDir,
+    mode: 'quick',
+    installAction: 'fresh',
+    soul: {},
+    user: {},
+    tools: {},
+    runtimes: { detected: [], mcpConfigured: false },
+    selectedSkills: [],
+  };
+
+  // Apply CLI overrides (strip undefined values)
+  if (options.cliOverrides) {
+    if (options.cliOverrides.soul) {
+      for (const [k, v] of Object.entries(options.cliOverrides.soul)) {
+        if (v !== undefined) {
+          (state.soul as Record<string, unknown>)[k] = v;
+        }
+      }
+    }
+    if (options.cliOverrides.user) {
+      for (const [k, v] of Object.entries(options.cliOverrides.user)) {
+        if (v !== undefined) {
+          (state.user as Record<string, unknown>)[k] = v;
+        }
+      }
+    }
+    if (options.cliOverrides.tools) {
+      for (const [k, v] of Object.entries(options.cliOverrides.tools)) {
+        if (v !== undefined) {
+          (state.tools as Record<string, unknown>)[k] = v;
+        }
+      }
+    }
+    if (options.cliOverrides.mode) {
+      state.mode = options.cliOverrides.mode;
+    }
+  }
+
+  // Stage 1: Welcome
+  await welcomeStage(prompter, state);
+
+  // Stage 2: Existing Install Detection
+  await detectInstallStage(prompter, state, configService);
+
+  // Stage 3: Quick Start vs Advanced (skip if keeping existing)
+  if (state.installAction === 'fresh' || state.installAction === 'reset') {
+    await modeSelectStage(prompter, state);
+  } else if (state.installAction === 'reconfigure') {
+    state.mode = 'advanced';
+  }
+
+  // Stage 4: SOUL.md
+  await soulSetupStage(prompter, state);
+
+  // Stage 5: USER.md
+  await userSetupStage(prompter, state);
+
+  // Stage 6: TOOLS.md
+  await toolsSetupStage(prompter, state);
+
+  // Stage 7: Runtime Detection & Installation
+  await runtimeSetupStage(prompter, state);
+
+  // Stage 8: Skills Selection
+  await skillsSelectStage(prompter, state);
+
+  // Stage 9: Finalize
+  await finalizeStage(prompter, state, configService);
+}
+
--- a/templates/SOUL.md.template
+++ b/templates/SOUL.md.template
@@ -35,6 +35,8 @@ If asked "who are you?", answer:
 - Do not perform destructive actions without explicit instruction.
 - Do not silently change intent, scope, or definitions.
 - Do not create fake policy by writing canned responses for every prompt.
+- Prefer `trash` over `rm` when available — recoverable beats gone forever.
+- Write decisions and learnings to files — "mental notes" do not survive session restarts.
 {{CUSTOM_GUARDRAILS}}

 ## Why This Exists
--- a/templates/TOOLS.md.template
+++ b/templates/TOOLS.md.template
@@ -0,0 +1,56 @@
+# Machine-Level Tool Reference
+
+Centralized reference for tools, credentials, and CLI patterns available across all projects.
+Project-specific tooling belongs in the project's `AGENTS.md`, not here.
+
+## Mosaic Git Wrappers (Use First)
+
+Mosaic wrappers at `~/.config/mosaic/rails/git/*.sh` handle platform detection and edge cases. Always use these before raw CLI commands.
+
+```bash
+# Issues
+~/.config/mosaic/rails/git/issue-create.sh
+~/.config/mosaic/rails/git/issue-close.sh
+
+# PRs
+~/.config/mosaic/rails/git/pr-create.sh
+~/.config/mosaic/rails/git/pr-merge.sh
+
+# Milestones
+~/.config/mosaic/rails/git/milestone-create.sh
+
+# CI queue guard (required before push/merge)
+~/.config/mosaic/rails/git/ci-queue-wait.sh --purpose push|merge
+```
+
+## Code Review (Codex)
+
+```bash
+# Code quality review
+~/.config/mosaic/rails/codex/codex-code-review.sh --uncommitted
+
+# Security review
+~/.config/mosaic/rails/codex/codex-security-review.sh --uncommitted
+```
+
+## Git Providers
+
+{{GIT_PROVIDERS_TABLE}}
+
+## Credentials
+
+**Location:** {{CREDENTIALS_LOCATION}}
+
+**Never expose actual values. Never commit credential files.**
+
+## CLI Gotchas
+
+(Add platform-specific CLI gotchas as you discover them.)
+
+{{CUSTOM_TOOLS_SECTION}}
+
+## Safety Defaults
+
+- Prefer `trash` over `rm` when available — recoverable beats gone forever
+- Never run destructive commands without explicit instruction
+- Write it down — "mental notes" don't survive session restarts; files do
--- a/templates/USER.md.template
+++ b/templates/USER.md.template
@@ -0,0 +1,30 @@
+# User Profile
+
+This file defines user-specific context for all agent sessions.
+It is loaded globally and applies regardless of runtime or project.
+
+## Identity
+
+- **Name:** {{USER_NAME}}
+- **Pronouns:** {{PRONOUNS}}
+- **Timezone:** {{TIMEZONE}}
+
+## Background
+
+{{BACKGROUND}}
+
+## Accessibility
+
+{{ACCESSIBILITY_SECTION}}
+
+## Communication Preferences
+
+{{COMMUNICATION_PREFS}}
+
+## Personal Boundaries
+
+{{PERSONAL_BOUNDARIES}}
+
+## Current Projects
+
+{{PROJECTS_TABLE}}
--- a/tests/integration/full-wizard.test.ts
+++ b/tests/integration/full-wizard.test.ts
@@ -0,0 +1,109 @@
+import { describe, it, expect, beforeEach, afterEach } from 'vitest';
+import {
+  mkdtempSync,
+  mkdirSync,
+  writeFileSync,
+  readFileSync,
+  existsSync,
+  rmSync,
+  cpSync,
+} from 'node:fs';
+import { join } from 'node:path';
+import { tmpdir } from 'node:os';
+import { HeadlessPrompter } from '../../src/prompter/headless-prompter.js';
+import { createConfigService } from '../../src/config/config-service.js';
+import { runWizard } from '../../src/wizard.js';
+
+describe('Full Wizard (headless)', () => {
+  let tmpDir: string;
+  const repoRoot = join(import.meta.dirname, '..', '..');
+
+  beforeEach(() => {
+    tmpDir = mkdtempSync(join(tmpdir(), 'mosaic-wizard-test-'));
+    // Copy templates to tmp dir
+    const templatesDir = join(repoRoot, 'templates');
+    if (existsSync(templatesDir)) {
+      cpSync(templatesDir, join(tmpDir, 'templates'), { recursive: true });
+    }
+  });
+
+  afterEach(() => {
+    rmSync(tmpDir, { recursive: true, force: true });
+  });
+
+  it('quick start produces valid SOUL.md', async () => {
+    const prompter = new HeadlessPrompter({
+      'Installation mode': 'quick',
+      'What name should agents use?': 'TestBot',
+      'Communication style': 'direct',
+      'Your name': 'Tester',
+      'Your pronouns': 'They/Them',
+      'Your timezone': 'UTC',
+    });
+
+    await runWizard({
+      mosaicHome: tmpDir,
+      sourceDir: tmpDir,
+      prompter,
+      configService: createConfigService(tmpDir, tmpDir),
+    });
+
+    const soulPath = join(tmpDir, 'SOUL.md');
+    expect(existsSync(soulPath)).toBe(true);
+
+    const soul = readFileSync(soulPath, 'utf-8');
+    expect(soul).toContain('You are **TestBot**');
+    expect(soul).toContain('Be direct, concise, and concrete');
+    expect(soul).toContain('execution partner and visibility engine');
+  });
+
+  it('quick start produces valid USER.md', async () => {
+    const prompter = new HeadlessPrompter({
+      'Installation mode': 'quick',
+      'What name should agents use?': 'TestBot',
+      'Communication style': 'direct',
+      'Your name': 'Tester',
+      'Your pronouns': 'He/Him',
+      'Your timezone': 'America/Chicago',
+    });
+
+    await runWizard({
+      mosaicHome: tmpDir,
+      sourceDir: tmpDir,
+      prompter,
+      configService: createConfigService(tmpDir, tmpDir),
+    });
+
+    const userPath = join(tmpDir, 'USER.md');
+    expect(existsSync(userPath)).toBe(true);
+
+    const user = readFileSync(userPath, 'utf-8');
+    expect(user).toContain('**Name:** Tester');
+    expect(user).toContain('**Pronouns:** He/Him');
+    expect(user).toContain('**Timezone:** America/Chicago');
+  });
+
+  it('applies CLI overrides', async () => {
+    const prompter = new HeadlessPrompter({
+      'Installation mode': 'quick',
+      'Your name': 'FromPrompt',
+    });
+
+    await runWizard({
+      mosaicHome: tmpDir,
+      sourceDir: tmpDir,
+      prompter,
+      configService: createConfigService(tmpDir, tmpDir),
+      cliOverrides: {
+        soul: {
+          agentName: 'FromCLI',
+          communicationStyle: 'formal',
+        },
+      },
+    });
+
+    const soul = readFileSync(join(tmpDir, 'SOUL.md'), 'utf-8');
+    expect(soul).toContain('You are **FromCLI**');
+    expect(soul).toContain('Use professional, structured language');
+  });
+});
--- a/tests/stages/detect-install.test.ts
+++ b/tests/stages/detect-install.test.ts
@@ -0,0 +1,71 @@
+import { describe, it, expect, beforeEach, afterEach } from 'vitest';
+import { mkdtempSync, mkdirSync, writeFileSync, rmSync } from 'node:fs';
+import { join } from 'node:path';
+import { tmpdir } from 'node:os';
+import { HeadlessPrompter } from '../../src/prompter/headless-prompter.js';
+import { detectInstallStage } from '../../src/stages/detect-install.js';
+import type { WizardState } from '../../src/types.js';
+import type { ConfigService } from '../../src/config/config-service.js';
+
+function createState(mosaicHome: string): WizardState {
+  return {
+    mosaicHome,
+    sourceDir: mosaicHome,
+    mode: 'quick',
+    installAction: 'fresh',
+    soul: {},
+    user: {},
+    tools: {},
+    runtimes: { detected: [], mcpConfigured: false },
+    selectedSkills: [],
+  };
+}
+
+const mockConfig: ConfigService = {
+  readSoul: async () => ({ agentName: 'TestAgent' }),
+  readUser: async () => ({ userName: 'TestUser' }),
+  readTools: async () => ({}),
+  writeSoul: async () => {},
+  writeUser: async () => {},
+  writeTools: async () => {},
+  syncFramework: async () => {},
+};
+
+describe('detectInstallStage', () => {
+  let tmpDir: string;
+
+  beforeEach(() => {
+    tmpDir = mkdtempSync(join(tmpdir(), 'mosaic-test-'));
+  });
+
+  afterEach(() => {
+    rmSync(tmpDir, { recursive: true, force: true });
+  });
+
+  it('sets fresh for empty directory', async () => {
+    const p = new HeadlessPrompter({});
+    const state = createState(join(tmpDir, 'nonexistent'));
+    await detectInstallStage(p, state, mockConfig);
+
+    expect(state.installAction).toBe('fresh');
+  });
+
+  it('detects existing install and offers choices', async () => {
+    // Create a mock existing install
+    mkdirSync(join(tmpDir, 'bin'), { recursive: true });
+    writeFileSync(join(tmpDir, 'AGENTS.md'), '# Test');
+    writeFileSync(
+      join(tmpDir, 'SOUL.md'),
+      'You are **Jarvis** in this session.',
+    );
+
+    const p = new HeadlessPrompter({
+      'What would you like to do?': 'keep',
+    });
+    const state = createState(tmpDir);
+    await detectInstallStage(p, state, mockConfig);
+
+    expect(state.installAction).toBe('keep');
+    expect(state.soul.agentName).toBe('TestAgent');
+  });
+});
--- a/tests/stages/soul-setup.test.ts
+++ b/tests/stages/soul-setup.test.ts
@@ -0,0 +1,74 @@
+import { describe, it, expect } from 'vitest';
+import { HeadlessPrompter } from '../../src/prompter/headless-prompter.js';
+import { soulSetupStage } from '../../src/stages/soul-setup.js';
+import type { WizardState } from '../../src/types.js';
+
+function createState(overrides: Partial<WizardState> = {}): WizardState {
+  return {
+    mosaicHome: '/tmp/test-mosaic',
+    sourceDir: '/tmp/test-mosaic',
+    mode: 'quick',
+    installAction: 'fresh',
+    soul: {},
+    user: {},
+    tools: {},
+    runtimes: { detected: [], mcpConfigured: false },
+    selectedSkills: [],
+    ...overrides,
+  };
+}
+
+describe('soulSetupStage', () => {
+  it('sets agent name and style in quick mode', async () => {
+    const p = new HeadlessPrompter({
+      'What name should agents use?': 'Jarvis',
+      'Communication style': 'friendly',
+    });
+
+    const state = createState({ mode: 'quick' });
+    await soulSetupStage(p, state);
+
+    expect(state.soul.agentName).toBe('Jarvis');
+    expect(state.soul.communicationStyle).toBe('friendly');
+    expect(state.soul.roleDescription).toBe(
+      'execution partner and visibility engine',
+    );
+  });
+
+  it('uses defaults in quick mode with no answers', async () => {
+    const p = new HeadlessPrompter({});
+    const state = createState({ mode: 'quick' });
+    await soulSetupStage(p, state);
+
+    expect(state.soul.agentName).toBe('Assistant');
+    expect(state.soul.communicationStyle).toBe('direct');
+  });
+
+  it('skips when install action is keep', async () => {
+    const p = new HeadlessPrompter({});
+    const state = createState({ installAction: 'keep' });
+    state.soul.agentName = 'Existing';
+    await soulSetupStage(p, state);
+
+    expect(state.soul.agentName).toBe('Existing');
+  });
+
+  it('asks for all fields in advanced mode', async () => {
+    const p = new HeadlessPrompter({
+      'What name should agents use?': 'Atlas',
+      'Agent role description': 'memory keeper',
+      'Communication style': 'formal',
+      'Accessibility preferences': 'ADHD-friendly',
+      'Custom guardrails (optional)': 'Never push to main',
+    });
+
+    const state = createState({ mode: 'advanced' });
+    await soulSetupStage(p, state);
+
+    expect(state.soul.agentName).toBe('Atlas');
+    expect(state.soul.roleDescription).toBe('memory keeper');
+    expect(state.soul.communicationStyle).toBe('formal');
+    expect(state.soul.accessibility).toBe('ADHD-friendly');
+    expect(state.soul.customGuardrails).toBe('Never push to main');
+  });
+});
--- a/tests/stages/user-setup.test.ts
+++ b/tests/stages/user-setup.test.ts
@@ -0,0 +1,60 @@
+import { describe, it, expect } from 'vitest';
+import { HeadlessPrompter } from '../../src/prompter/headless-prompter.js';
+import { userSetupStage } from '../../src/stages/user-setup.js';
+import type { WizardState } from '../../src/types.js';
+
+function createState(overrides: Partial<WizardState> = {}): WizardState {
+  return {
+    mosaicHome: '/tmp/test-mosaic',
+    sourceDir: '/tmp/test-mosaic',
+    mode: 'quick',
+    installAction: 'fresh',
+    soul: { communicationStyle: 'direct' },
+    user: {},
+    tools: {},
+    runtimes: { detected: [], mcpConfigured: false },
+    selectedSkills: [],
+    ...overrides,
+  };
+}
+
+describe('userSetupStage', () => {
+  it('collects basic info in quick mode', async () => {
+    const p = new HeadlessPrompter({
+      'Your name': 'Jason',
+      'Your pronouns': 'He/Him',
+      'Your timezone': 'America/Chicago',
+    });
+
+    const state = createState({ mode: 'quick' });
+    await userSetupStage(p, state);
+
+    expect(state.user.userName).toBe('Jason');
+    expect(state.user.pronouns).toBe('He/Him');
+    expect(state.user.timezone).toBe('America/Chicago');
+    expect(state.user.communicationPrefs).toContain('Direct and concise');
+  });
+
+  it('skips when install action is keep', async () => {
+    const p = new HeadlessPrompter({});
+    const state = createState({ installAction: 'keep' });
+    state.user.userName = 'Existing';
+    await userSetupStage(p, state);
+
+    expect(state.user.userName).toBe('Existing');
+  });
+
+  it('derives communication prefs from soul style', async () => {
+    const p = new HeadlessPrompter({
+      'Your name': 'Test',
+    });
+
+    const state = createState({
+      mode: 'quick',
+      soul: { communicationStyle: 'friendly' },
+    });
+    await userSetupStage(p, state);
+
+    expect(state.user.communicationPrefs).toContain('Warm and conversational');
+  });
+});
--- a/tests/template/builders.test.ts
+++ b/tests/template/builders.test.ts
@@ -0,0 +1,99 @@
+import { describe, it, expect } from 'vitest';
+import {
+  buildSoulTemplateVars,
+  buildUserTemplateVars,
+  buildToolsTemplateVars,
+} from '../../src/template/builders.js';
+
+describe('buildSoulTemplateVars', () => {
+  it('builds direct style correctly', () => {
+    const vars = buildSoulTemplateVars({
+      agentName: 'Jarvis',
+      communicationStyle: 'direct',
+    });
+    expect(vars.AGENT_NAME).toBe('Jarvis');
+    expect(vars.BEHAVIORAL_PRINCIPLES).toContain('Clarity over performance theater');
+    expect(vars.COMMUNICATION_STYLE).toContain('Be direct, concise, and concrete');
+  });
+
+  it('builds friendly style correctly', () => {
+    const vars = buildSoulTemplateVars({
+      communicationStyle: 'friendly',
+    });
+    expect(vars.BEHAVIORAL_PRINCIPLES).toContain('Be helpful and approachable');
+    expect(vars.COMMUNICATION_STYLE).toContain('Be warm and conversational');
+  });
+
+  it('builds formal style correctly', () => {
+    const vars = buildSoulTemplateVars({
+      communicationStyle: 'formal',
+    });
+    expect(vars.BEHAVIORAL_PRINCIPLES).toContain('Maintain professional, structured');
+    expect(vars.COMMUNICATION_STYLE).toContain('Use professional, structured language');
+  });
+
+  it('appends accessibility to principles', () => {
+    const vars = buildSoulTemplateVars({
+      communicationStyle: 'direct',
+      accessibility: 'ADHD-friendly chunking',
+    });
+    expect(vars.BEHAVIORAL_PRINCIPLES).toContain('6. ADHD-friendly chunking.');
+  });
+
+  it('does not append accessibility when "none"', () => {
+    const vars = buildSoulTemplateVars({
+      communicationStyle: 'direct',
+      accessibility: 'none',
+    });
+    expect(vars.BEHAVIORAL_PRINCIPLES).not.toContain('6.');
+  });
+
+  it('formats custom guardrails', () => {
+    const vars = buildSoulTemplateVars({
+      customGuardrails: 'Never auto-commit',
+    });
+    expect(vars.CUSTOM_GUARDRAILS).toBe('- Never auto-commit');
+  });
+
+  it('uses defaults when config is empty', () => {
+    const vars = buildSoulTemplateVars({});
+    expect(vars.AGENT_NAME).toBe('Assistant');
+    expect(vars.ROLE_DESCRIPTION).toBe('execution partner and visibility engine');
+  });
+});
+
+describe('buildUserTemplateVars', () => {
+  it('maps all fields', () => {
+    const vars = buildUserTemplateVars({
+      userName: 'Jason',
+      pronouns: 'He/Him',
+      timezone: 'America/Chicago',
+    });
+    expect(vars.USER_NAME).toBe('Jason');
+    expect(vars.PRONOUNS).toBe('He/Him');
+    expect(vars.TIMEZONE).toBe('America/Chicago');
+  });
+
+  it('uses defaults for missing fields', () => {
+    const vars = buildUserTemplateVars({});
+    expect(vars.PRONOUNS).toBe('They/Them');
+    expect(vars.TIMEZONE).toBe('UTC');
+  });
+});
+
+describe('buildToolsTemplateVars', () => {
+  it('builds git providers table', () => {
+    const vars = buildToolsTemplateVars({
+      gitProviders: [
+        { name: 'GitHub', url: 'https://github.com', cli: 'gh', purpose: 'OSS' },
+      ],
+    });
+    expect(vars.GIT_PROVIDERS_TABLE).toContain('| GitHub |');
+    expect(vars.GIT_PROVIDERS_TABLE).toContain('`gh`');
+  });
+
+  it('uses default table when no providers', () => {
+    const vars = buildToolsTemplateVars({});
+    expect(vars.GIT_PROVIDERS_TABLE).toContain('add your git providers here');
+  });
+});
--- a/tests/template/engine.test.ts
+++ b/tests/template/engine.test.ts
@@ -0,0 +1,52 @@
+import { describe, it, expect } from 'vitest';
+import { renderTemplate } from '../../src/template/engine.js';
+
+describe('renderTemplate', () => {
+  it('replaces all placeholders', () => {
+    const template = 'You are **{{AGENT_NAME}}**, role: {{ROLE_DESCRIPTION}}';
+    const result = renderTemplate(template, {
+      AGENT_NAME: 'Jarvis',
+      ROLE_DESCRIPTION: 'steward',
+    });
+    expect(result).toBe('You are **Jarvis**, role: steward');
+  });
+
+  it('preserves ${ENV_VAR} references', () => {
+    const template = 'Path: ${HOME}/.config, Agent: {{AGENT_NAME}}';
+    const result = renderTemplate(template, { AGENT_NAME: 'Test' });
+    expect(result).toBe('Path: ${HOME}/.config, Agent: Test');
+  });
+
+  it('handles multi-line values', () => {
+    const template = '{{PRINCIPLES}}';
+    const result = renderTemplate(template, {
+      PRINCIPLES: '1. First\n2. Second\n3. Third',
+    });
+    expect(result).toBe('1. First\n2. Second\n3. Third');
+  });
+
+  it('replaces unset vars with empty string by default', () => {
+    const template = 'Before {{MISSING}} After';
+    const result = renderTemplate(template, {});
+    expect(result).toBe('Before  After');
+  });
+
+  it('throws in strict mode for missing vars', () => {
+    const template = '{{MISSING}}';
+    expect(() => renderTemplate(template, {}, { strict: true })).toThrow(
+      'Template variable not provided: {{MISSING}}',
+    );
+  });
+
+  it('handles multiple occurrences of same placeholder', () => {
+    const template = '{{NAME}} says hello, {{NAME}}!';
+    const result = renderTemplate(template, { NAME: 'Jarvis' });
+    expect(result).toBe('Jarvis says hello, Jarvis!');
+  });
+
+  it('preserves non-placeholder curly braces', () => {
+    const template = 'const x = { foo: {{VALUE}} }';
+    const result = renderTemplate(template, { VALUE: '"bar"' });
+    expect(result).toBe('const x = { foo: "bar" }');
+  });
+});
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "esModuleInterop": true,
+    "strict": true,
+    "outDir": "dist",
+    "rootDir": "src",
+    "declaration": false,
+    "sourceMap": false,
+    "skipLibCheck": true,
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "forceConsistentCasingInFileNames": true
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": ["node_modules", "dist", "tests"]
+}
--- a/tsdown.config.ts
+++ b/tsdown.config.ts
@@ -0,0 +1,13 @@
+import { defineConfig } from 'tsdown';
+
+export default defineConfig({
+  entry: { 'mosaic-wizard': 'src/index.ts' },
+  format: 'esm',
+  outDir: 'dist',
+  clean: true,
+  noExternal: [/.*/],
+  inlineOnly: false,
+  banner: { js: '#!/usr/bin/env node' },
+  target: 'node18',
+  minify: false,
+});
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -0,0 +1,9 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    include: ['tests/**/*.test.ts'],
+    environment: 'node',
+    globals: true,
+  },
+});