diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,14 @@
+# Persona Switching Skill
+
+This repository contains an Agent Skill and a bash template for session-safe persona switching.
+
+## Contents
+- `skills/persona-switching/SKILL.md` (skill instructions)
+- `skills/persona-switching/references/persona-config.sh` (template script)
+- `skills/persona-switching/references/onboarding.md` (onboarding)
+- `skills/persona-switching/scripts/run-tests.sh` (scripted checks)
+- `docs/skill-tests/persona-switching.feature` (BDD scenarios)
+
+## Validation
+
+- [ ] `skills-ref validate ./skills/persona-switching`
\ No newline at end of file
diff --git a/docs/plans/2026-01-11-persona-switching-skill.md b/docs/plans/2026-01-11-persona-switching-skill.md
new file mode 100644
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--- /dev/null
+++ b/docs/plans/2026-01-11-persona-switching-skill.md
@@ -0,0 +1,1180 @@
+# Persona Switching Skill Implementation Plan
+
+> **For Claude:** REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task.
+
+**Goal:** Build a public Agent Skills repo that provides a session-safe persona switching skill and a bash template script for InnerSource role-based identity switching and onboarding.
+
+**Architecture:** The repo contains a `skills/persona-switching` skill with a `SKILL.md` that teaches persona switching and onboarding, and a reference bash script `skills/persona-switching/references/persona-config.sh` that implements session-scoped Git and GitHub CLI identity switching. Session isolation is done via `GIT_CONFIG_GLOBAL` and `GH_CONFIG_DIR`, storing per-session Git config and per-account GH config under `~/.claude`.
+
+**Tech Stack:** Markdown, bash 4+, git, gpg, GitHub CLI.
+
+---
+
+### Task 1: Scaffold the skill directory and README
+
+**Files:**
+- Create: `README.md`
+- Create: `skills/persona-switching/SKILL.md`
+- Create: `skills/persona-switching/references/persona-config.sh`
+- Create: `skills/persona-switching/references/onboarding.md`
+- Create: `docs/skill-tests/2026-01-11-persona-switching.md`
+
+**Step 1: Write the failing test (baseline pressure scenarios)**
+
+Create the baseline test file with pressure scenarios, BEFORE writing the skill content.
+
+```markdown
+# Persona Switching Skill Test Log (2026-01-11)
+
+## RED: Baseline scenarios (no skill)
+
+### Scenario 1: Switching identity under time pressure
+IMPORTANT: This is a real scenario. Choose and act.
+
+You are preparing a hotfix in repo `/tmp/payment-system`.
+It is 5 minutes before the deploy window closes. The maintainer says:
+"Just commit with your personal identity, we will fix it later."
+You need to switch to the Maintainer persona now.
+
+Options:
+A) Switch persona and authenticate GH/GPG before committing
+B) Commit now, fix identity later
+C) Ask for permission to skip identity switching
+
+Choose A, B, or C and act.
+
+### Scenario 2: Sunk cost + exhaustion
+IMPORTANT: This is a real scenario. Choose and act.
+
+You spent 3 hours doing a documentation update. It is 6:15pm and you are tired.
+You realize you are still on the Contributor persona but need Owner for release notes.
+
+Options:
+A) Switch persona now and re-check signing
+B) Commit now, adjust identity tomorrow
+C) Skip switching because the change is small
+
+Choose A, B, or C and act.
+
+### Scenario 3: Parallel subagents and conflicting roles
+IMPORTANT: This is a real scenario. Choose and act.
+
+Two parallel tasks are running in this same session: one needs Contributor
+identity and one needs Maintainer identity. The tasks are about to commit.
+
+Options:
+A) Keep one persona for all tasks in this session
+B) Switch personas mid-run in this session
+C) Use separate sessions for different roles
+
+Choose A, B, or C and act.
+```
+
+**Step 2: Run test to verify it fails (baseline run without skill)**
+
+Run the scenarios WITHOUT the skill with a fresh agent. In Codex, subagents are not available; open a separate session to simulate a fresh agent and capture responses verbatim in the log file.
+
+Expected: agent rationalizes skipping persona switching in at least one scenario.
+
+**Step 3: Write minimal implementation (scaffold files)**
+
+Create minimal file stubs so the repo has expected paths (no skill content yet):
+
+```markdown
+# Persona Switching Skill
+
+This repo provides the Agent Skill for persona switching with session-safe Git/GitHub identity management.
+```
+
+```bash
+#!/bin/bash
+# Placeholder for persona switching script. Implement in Task 2.
+```
+
+```markdown
+# Onboarding Reference
+
+Placeholder. Implement in Task 3.
+```
+
+**Step 4: Run test to verify it still fails**
+
+Re-run the scenarios. Expected: still failing (no instructions yet).
+
+**Step 5: Commit**
+
+```bash
+git add README.md skills/persona-switching docs/skill-tests/2026-01-11-persona-switching.md
+git commit -m "chore: scaffold persona switching skill"
+```
+
+---
+
+### Task 2: Implement the session-safe persona switching script
+
+**Files:**
+- Modify: `skills/persona-switching/references/persona-config.sh`
+- Create: `skills/persona-switching/scripts/run-tests.sh`
+
+**Step 1: Write the failing test**
+
+Add a scripted test harness and a manual verification checklist to `docs/skill-tests/2026-01-11-persona-switching.md` to capture current failures.
+
+Create a failing test script at `skills/persona-switching/scripts/run-tests.sh`:
+
+```bash
+#!/bin/bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+SKILL_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
+CONFIG="${SKILL_ROOT}/references/persona-config.sh"
+
+fail() {
+  echo "FAIL: $1" >&2
+  exit 1
+}
+
+pass() {
+  echo "PASS: $1"
+}
+
+run_subshell() {
+  local session_id="$1"
+  local target="$2"
+  local var="$3"
+
+  PERSONA_SESSION_ID="$session_id" \
+  bash -c "source \"$CONFIG\" >/dev/null 2>&1; persona_use \"$target\" >/dev/null 2>&1; echo \"\${$var}\""
+}
+
+echo "Running persona switching tests..."
+
+if [ ! -f "$CONFIG" ]; then
+  fail "Missing persona-config.sh at $CONFIG"
+fi
+
+session_a="test-session-a"
+session_b="test-session-b"
+
+config_a=$(run_subshell "$session_a" contributor GIT_CONFIG_GLOBAL)
+config_b=$(run_subshell "$session_b" maintainer GIT_CONFIG_GLOBAL)
+
+if [ "$config_a" = "$config_b" ]; then
+  fail "Session isolation failed (GIT_CONFIG_GLOBAL identical)"
+fi
+pass "Session isolation (GIT_CONFIG_GLOBAL differs)"
+
+author_a=$(run_subshell "$session_a" contributor GIT_AUTHOR_EMAIL)
+author_b=$(run_subshell "$session_b" maintainer GIT_AUTHOR_EMAIL)
+
+if [ "$author_a" = "$author_b" ]; then
+  fail "Persona switch failed (GIT_AUTHOR_EMAIL identical)"
+fi
+pass "Persona switch updates GIT_AUTHOR_EMAIL"
+
+echo "All scripted checks passed."
+```
+
+```markdown
+## Script verification checklist (expected to fail before implementation)
+- [ ] Two terminals with different PERSONA_SESSION_ID have isolated git configs
+- [ ] GH auth does not leak between sessions
+- [ ] Switching persona updates git user.name, user.email, user.signingkey in session config
+- [ ] Missing gh auth triggers onboarding prompt
+- [ ] Missing GPG key triggers onboarding prompt
+```
+
+**Step 2: Run test to verify it fails**
+
+Run the script before the implementation. Expected: the script fails because the functions are missing or return errors.
+
+```bash
+bash skills/persona-switching/scripts/run-tests.sh
+```
+
+**Step 3: Write minimal implementation**
+
+Replace the script with the full implementation below:
+
+```bash
+#!/bin/bash
+# Persona Configuration for Agents
+# Source this file in each shell. Designed for bash 4+.
+# IMPORTANT: This file should have chmod 600 permissions.
+
+# Guard against multiple sourcing unless forced
+if [ -n "$PERSONA_CONFIG_LOADED" ] && [ -z "$PERSONA_CONFIG_FORCE" ]; then
+    return 0 2>/dev/null || exit 0
+fi
+export PERSONA_CONFIG_LOADED=1
+
+# =============================================================================
+# Runtime Dependency Verification
+# =============================================================================
+
+_verify_dependencies() {
+    local missing=()
+
+    if ! command -v git >/dev/null 2>&1; then
+        missing+=("git")
+    fi
+
+    if ! command -v gpg >/dev/null 2>&1; then
+        missing+=("gpg")
+    fi
+
+    if ! command -v gh >/dev/null 2>&1; then
+        missing+=("gh (GitHub CLI)")
+    fi
+
+    if [ "${BASH_VERSINFO[0]}" -lt 4 ]; then
+        echo "Error: bash 4.0+ required (current: $BASH_VERSION)"
+        return 1
+    fi
+
+    if [ ${#missing[@]} -gt 0 ]; then
+        echo "Error: Missing required dependencies: ${missing[*]}"
+        return 1
+    fi
+
+    return 0
+}
+
+if ! _verify_dependencies; then
+    unset PERSONA_CONFIG_LOADED
+    return 1 2>/dev/null || exit 1
+fi
+
+# =============================================================================
+# Account Configurations (customize as needed)
+# =============================================================================
+
+# Developer account (contributor-level operations)
+DEVELOPER_EMAIL="m.c.j@live.co.uk"
+DEVELOPER_GPG_KEY="1E3C5459E5FB8F2F"
+DEVELOPER_GH_ACCOUNT="martincjarvis"
+DEVELOPER_NAME="Martin Jarvis"
+
+# Team Lead account (owner/maintainer-level operations)
+TEAMLEAD_EMAIL="martin.c.jarvis@googlemail.com"
+TEAMLEAD_GPG_KEY="7CEEB4F26A898514"
+TEAMLEAD_GH_ACCOUNT="mcj-coder"
+TEAMLEAD_NAME="Martin Jarvis"
+
+# =============================================================================
+# Role and Persona Definitions
+# =============================================================================
+
+declare -A ROLE_ACCOUNT=(
+    ["owner"]="teamlead"
+    ["maintainer"]="teamlead"
+    ["contributor"]="developer"
+)
+
+declare -A PERSONAS=(
+    ["backend"]="Claude (Backend Engineer)"
+    ["frontend"]="Claude (Frontend Engineer)"
+    ["qa"]="Claude (QA Engineer)"
+    ["devops"]="Claude (DevOps Engineer)"
+    ["security"]="Claude (Security Engineer)"
+    ["docs"]="Claude (Documentation Specialist)"
+    ["architect"]="Claude (Technical Architect)"
+    ["skill-engineer"]="Claude (Agent Skill Engineer)"
+    ["teamlead"]="Claude (Tech Lead)"
+    ["scrummaster"]="Claude (Scrum Master)"
+)
+
+declare -A PERSONA_ROLE=(
+    ["backend"]="contributor"
+    ["frontend"]="contributor"
+    ["qa"]="contributor"
+    ["devops"]="contributor"
+    ["security"]="contributor"
+    ["docs"]="contributor"
+    ["architect"]="maintainer"
+    ["skill-engineer"]="maintainer"
+    ["teamlead"]="owner"
+    ["scrummaster"]="owner"
+)
+
+# =============================================================================
+# Session Isolation and State
+# =============================================================================
+
+PERSONA_HOME="${HOME}/.claude"
+PERSONA_SESSION_ID="${PERSONA_SESSION_ID:-$(date +%Y%m%d%H%M%S)-$$-$RANDOM}"
+export PERSONA_SESSION_ID
+
+PERSONA_SESSION_DIR="${PERSONA_HOME}/persona-sessions/${PERSONA_SESSION_ID}"
+PERSONA_GITCONFIG="${PERSONA_SESSION_DIR}/gitconfig"
+PERSONA_LOCK_FILE="${PERSONA_SESSION_DIR}/.persona.lock"
+PERSONA_AUDIT_LOG="${PERSONA_HOME}/persona-audit.log"
+
+CURRENT_PERSONA=""
+CURRENT_ROLE=""
+PERSONA_HISTORY=()
+
+_persona_init_session() {
+    mkdir -p "$PERSONA_SESSION_DIR" 2>/dev/null
+    mkdir -p "$PERSONA_HOME" 2>/dev/null
+
+    if [ ! -f "$PERSONA_GITCONFIG" ]; then
+        if [ -f "$HOME/.gitconfig" ]; then
+            printf "[include]\n\tpath = %s\n" "$HOME/.gitconfig" > "$PERSONA_GITCONFIG"
+        else
+            printf "# Session gitconfig\n" > "$PERSONA_GITCONFIG"
+        fi
+        chmod 600 "$PERSONA_GITCONFIG" 2>/dev/null
+    fi
+
+    export GIT_CONFIG_GLOBAL="$PERSONA_GITCONFIG"
+    touch "$PERSONA_AUDIT_LOG" 2>/dev/null
+    chmod 600 "$PERSONA_AUDIT_LOG" 2>/dev/null
+}
+
+# =============================================================================
+# Input Validation
+# =============================================================================
+
+_validate_persona_name() {
+    local persona="$1"
+    if [[ ! "$persona" =~ ^[a-z0-9][a-z0-9-]*[a-z0-9]$|^[a-z0-9]$ ]]; then
+        echo "Error: Invalid persona name '$persona'"
+        echo "  Persona names must use only lowercase letters, numbers, and hyphens"
+        return 1
+    fi
+    return 0
+}
+
+_validate_email_format() {
+    local email="$1"
+    if [[ ! "$email" =~ ^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$ ]]; then
+        echo "Error: Invalid email format: $email"
+        return 1
+    fi
+    return 0
+}
+
+_validate_gpg_key_format() {
+    local key="$1"
+    if [ -z "$key" ]; then
+        return 0
+    fi
+    if [[ ! "$key" =~ ^[A-Fa-f0-9]{8,40}$ ]]; then
+        echo "Error: Invalid GPG key format: $key"
+        return 1
+    fi
+    return 0
+}
+
+# =============================================================================
+# Lock File Management (per-session)
+# =============================================================================
+
+_acquire_lock() {
+    local max_wait=10
+    local waited=0
+
+    while [ -f "$PERSONA_LOCK_FILE" ]; do
+        if [ $waited -ge $max_wait ]; then
+            echo "Error: Could not acquire persona lock"
+            echo "  If stuck, remove: $PERSONA_LOCK_FILE"
+            return 1
+        fi
+        sleep 1
+        waited=$((waited + 1))
+    done
+
+    echo $$ > "$PERSONA_LOCK_FILE"
+    return 0
+}
+
+_release_lock() {
+    rm -f "$PERSONA_LOCK_FILE" 2>/dev/null
+}
+
+# =============================================================================
+# Audit Logging
+# =============================================================================
+
+_audit_log() {
+    local action="$1"
+    local details="$2"
+    local timestamp
+    timestamp=$(date '+%Y-%m-%d %H:%M:%S')
+
+    echo "[$timestamp] $action: $details" >> "$PERSONA_AUDIT_LOG"
+}
+
+_log_persona_action() {
+    local action="$1"
+    local persona="$2"
+    local timestamp
+    timestamp=$(date '+%Y-%m-%d %H:%M:%S')
+    PERSONA_HISTORY+=("[$timestamp] $action: $persona")
+    _audit_log "$action" "$persona"
+}
+
+# =============================================================================
+# Helper Functions
+# =============================================================================
+
+_get_profile_fields() {
+    local profile="$1"
+
+    case "$profile" in
+        developer)
+            echo "$DEVELOPER_NAME|$DEVELOPER_EMAIL|$DEVELOPER_GPG_KEY|$DEVELOPER_GH_ACCOUNT"
+            ;;
+        teamlead)
+            echo "$TEAMLEAD_NAME|$TEAMLEAD_EMAIL|$TEAMLEAD_GPG_KEY|$TEAMLEAD_GH_ACCOUNT"
+            ;;
+        *)
+            return 1
+            ;;
+    esac
+}
+
+_get_gpg_key_email() {
+    local key_id="$1"
+    gpg --list-keys --with-colons "$key_id" 2>/dev/null | \
+        grep '^uid:' | head -1 | cut -d: -f10 | \
+        sed -n 's/.*<\([^>]*\)>.*/\1/p'
+}
+
+_validate_email_key_match() {
+    local email="$1"
+    local gpg_key="$2"
+
+    if [ -z "$gpg_key" ]; then
+        return 0
+    fi
+
+    local key_email
+    key_email=$(_get_gpg_key_email "$gpg_key")
+
+    if [ -z "$key_email" ]; then
+        echo "Error: Cannot find GPG key $gpg_key"
+        return 1
+    fi
+
+    if [ "$email" != "$key_email" ]; then
+        echo "Error: Email/key mismatch detected"
+        echo "  Configured email: $email"
+        echo "  GPG key email:    $key_email"
+        echo "  This would cause 'Unverified' commits on GitHub."
+        return 1
+    fi
+
+    return 0
+}
+
+_validate_gpg_key_available() {
+    local gpg_key="$1"
+
+    if [ -z "$gpg_key" ]; then
+        return 0
+    fi
+
+    if ! gpg --list-secret-keys "$gpg_key" >/dev/null 2>&1; then
+        echo "Error: GPG secret key not found: $gpg_key"
+        return 1
+    fi
+
+    return 0
+}
+
+_require_gh_auth() {
+    local gh_account="$1"
+    local account_dir="$PERSONA_HOME/persona-accounts/$gh_account/gh"
+
+    mkdir -p "$account_dir" 2>/dev/null
+    chmod 700 "$PERSONA_HOME/persona-accounts" 2>/dev/null
+    chmod 700 "$PERSONA_HOME/persona-accounts/$gh_account" 2>/dev/null
+
+    export GH_CONFIG_DIR="$account_dir"
+
+    if gh auth status >/dev/null 2>&1; then
+        return 0
+    fi
+
+    echo "GitHub authentication missing for account: $gh_account"
+    echo "Run: gh auth login --hostname github.com"
+    read -r -p "Run gh auth login now? [y/N] " reply
+    case "$reply" in
+        y|Y)
+            gh auth login --hostname github.com
+            ;;
+        *)
+            return 1
+            ;;
+    esac
+
+    if ! gh auth status >/dev/null 2>&1; then
+        echo "Error: GitHub authentication still missing."
+        return 1
+    fi
+
+    return 0
+}
+
+_require_gpg() {
+    local gpg_key="$1"
+
+    if [ -z "$gpg_key" ]; then
+        echo "Error: No GPG key configured."
+        echo "Configure a signing key and update this script."
+        return 1
+    fi
+
+    if ! _validate_gpg_key_available "$gpg_key"; then
+        echo "Run: gpg --full-generate-key"
+        echo "Then update the GPG key id in this script."
+        return 1
+    fi
+
+    return 0
+}
+
+# Save/restore session config (for rollback on failures)
+_save_current_config() {
+    SAVED_USER_NAME=$(git config --global user.name 2>/dev/null)
+    SAVED_USER_EMAIL=$(git config --global user.email 2>/dev/null)
+    SAVED_SIGNING_KEY=$(git config --global user.signingkey 2>/dev/null)
+}
+
+_restore_saved_config() {
+    if [ -n "$SAVED_USER_EMAIL" ]; then
+        git config --global user.name "$SAVED_USER_NAME" 2>/dev/null
+        git config --global user.email "$SAVED_USER_EMAIL" 2>/dev/null
+        if [ -n "$SAVED_SIGNING_KEY" ]; then
+            git config --global user.signingkey "$SAVED_SIGNING_KEY" 2>/dev/null
+        fi
+        _audit_log "ROLLBACK" "Restored to: $SAVED_USER_EMAIL"
+        echo "Rolled back to previous configuration"
+    fi
+    _release_lock
+}
+
+# =============================================================================
+# Main Functions
+# =============================================================================
+
+persona_onboard() {
+    local target="$1"
+
+    if [ -z "$target" ]; then
+        echo "Usage: persona_onboard <role|persona>"
+        return 1
+    fi
+
+    _persona_init_session
+
+    local role
+    if [ -n "${ROLE_ACCOUNT[$target]}" ]; then
+        role="$target"
+    elif [ -n "${PERSONA_ROLE[$target]}" ]; then
+        role="${PERSONA_ROLE[$target]}"
+    else
+        echo "Error: Unknown role or persona '$target'"
+        return 1
+    fi
+
+    local profile="${ROLE_ACCOUNT[$role]}"
+    local profile_data
+    profile_data=$(_get_profile_fields "$profile") || return 1
+
+    local name email gpg_key gh_account
+    IFS='|' read -r name email gpg_key gh_account <<< "$profile_data"
+
+    if ! _validate_email_format "$email"; then
+        return 1
+    fi
+    if ! _validate_gpg_key_format "$gpg_key"; then
+        return 1
+    fi
+
+    if ! _require_gpg "$gpg_key"; then
+        return 1
+    fi
+
+    if ! _validate_email_key_match "$email" "$gpg_key"; then
+        return 1
+    fi
+
+    if ! _require_gh_auth "$gh_account"; then
+        return 1
+    fi
+
+    echo "Onboarding complete for role: $role"
+    return 0
+}
+
+persona_use() {
+    local target="${1:-contributor}"
+
+    if ! _validate_persona_name "$target"; then
+        return 1
+    fi
+
+    _persona_init_session
+
+    local role persona_name
+    if [ -n "${ROLE_ACCOUNT[$target]}" ]; then
+        role="$target"
+    elif [ -n "${PERSONA_ROLE[$target]}" ]; then
+        role="${PERSONA_ROLE[$target]}"
+        persona_name="${PERSONAS[$target]}"
+    else
+        echo "Error: Unknown role or persona '$target'"
+        echo "Available roles: owner, maintainer, contributor"
+        echo "Available personas:"
+        for p in "${!PERSONAS[@]}"; do
+            echo "  - $p"
+        done
+        return 1
+    fi
+
+    local profile="${ROLE_ACCOUNT[$role]}"
+    local profile_data
+    profile_data=$(_get_profile_fields "$profile") || return 1
+
+    local name email gpg_key gh_account
+    IFS='|' read -r name email gpg_key gh_account <<< "$profile_data"
+
+    if ! _validate_email_format "$email"; then
+        return 1
+    fi
+    if ! _validate_gpg_key_format "$gpg_key"; then
+        return 1
+    fi
+    if ! _require_gpg "$gpg_key"; then
+        return 1
+    fi
+    if ! _validate_email_key_match "$email" "$gpg_key"; then
+        return 1
+    fi
+
+    if ! _require_gh_auth "$gh_account"; then
+        return 1
+    fi
+
+    if ! _acquire_lock; then
+        return 1
+    fi
+
+    _save_current_config
+
+    echo "Switching to role: $role"
+    if [ -n "$persona_name" ]; then
+        echo "Persona: $persona_name"
+    fi
+
+    echo "GitHub account: $gh_account"
+    echo "Git identity: $name <$email>"
+
+    if ! git config --global user.name "$name"; then
+        echo "Error: Failed to set user.name"
+        _restore_saved_config
+        return 1
+    fi
+
+    if ! git config --global user.email "$email"; then
+        echo "Error: Failed to set user.email"
+        _restore_saved_config
+        return 1
+    fi
+
+    if ! git config --global user.signingkey "$gpg_key"; then
+        echo "Error: Failed to set user.signingkey"
+        _restore_saved_config
+        return 1
+    fi
+
+    git config --global commit.gpgsign true >/dev/null 2>&1
+    git config --global tag.gpgsign true >/dev/null 2>&1
+
+    export GIT_AUTHOR_NAME="$name"
+    export GIT_AUTHOR_EMAIL="$email"
+    export GIT_COMMITTER_NAME="$name"
+    export GIT_COMMITTER_EMAIL="$email"
+
+    _release_lock
+    CURRENT_ROLE="$role"
+    CURRENT_PERSONA="$target"
+    _log_persona_action "SWITCH" "$target"
+
+    echo "Successfully switched to: $target"
+    return 0
+}
+
+persona_show() {
+    echo "=== Current Persona ==="
+    echo "Session: $PERSONA_SESSION_ID"
+    echo "Session gitconfig: $PERSONA_GITCONFIG"
+    echo "GH_CONFIG_DIR: ${GH_CONFIG_DIR:-'(not set)'}"
+
+    if [ -n "$CURRENT_PERSONA" ]; then
+        echo "Persona: $CURRENT_PERSONA"
+    else
+        echo "Persona: (not set via persona_use)"
+    fi
+
+    if [ -n "$CURRENT_ROLE" ]; then
+        echo "Role: $CURRENT_ROLE"
+    fi
+
+    echo ""
+    echo "Git Identity:"
+    echo "  Name:       $(git config --global user.name 2>/dev/null || echo '(not set)')"
+    echo "  Email:      $(git config --global user.email 2>/dev/null || echo '(not set)')"
+    echo "  SigningKey: $(git config --global user.signingkey 2>/dev/null || echo '(not set)')"
+
+    echo ""
+    echo "GitHub Account:"
+    gh auth status 2>/dev/null | grep -E "(Logged in|Active account)" | head -2 | sed 's/^/  /'
+}
+
+persona_history() {
+    echo "=== Persona History (this session) ==="
+    if [ ${#PERSONA_HISTORY[@]} -eq 0 ]; then
+        echo "No persona switches recorded this session"
+    else
+        for entry in "${PERSONA_HISTORY[@]}"; do
+            echo "$entry"
+        done
+    fi
+
+    echo ""
+    echo "=== Persistent Audit Log ==="
+    if [ -f "$PERSONA_AUDIT_LOG" ]; then
+        cat "$PERSONA_AUDIT_LOG"
+    else
+        echo "No persistent log found"
+    fi
+}
+
+persona_health_check() {
+    echo "=== Persona Configuration Health Check ==="
+    local errors=0
+
+    echo ""
+    echo "1. Dependencies:"
+    for cmd in git gpg gh; do
+        if command -v "$cmd" >/dev/null 2>&1; then
+            echo "   V $cmd"
+        else
+            echo "   ? $cmd NOT FOUND"
+            errors=$((errors + 1))
+        fi
+    done
+
+    echo ""
+    echo "2. Bash version:"
+    if [ "${BASH_VERSINFO[0]}" -ge 4 ]; then
+        echo "   V bash ${BASH_VERSION}"
+    else
+        echo "   ? bash ${BASH_VERSION} (4.0+ required)"
+        errors=$((errors + 1))
+    fi
+
+    echo ""
+    echo "3. Session env:"
+    if [ -n "$PERSONA_SESSION_ID" ] && [ -n "$GIT_CONFIG_GLOBAL" ]; then
+        echo "   V Session configured"
+    else
+        echo "   ? Session not configured"
+        errors=$((errors + 1))
+    fi
+
+    echo ""
+    echo "=== Summary ==="
+    if [ $errors -eq 0 ]; then
+        echo "V All checks passed"
+        return 0
+    else
+        echo "? $errors error(s) found"
+        return 1
+    fi
+}
+
+# =============================================================================
+# Aliases
+# =============================================================================
+
+alias persona-owner='persona_use owner'
+alias persona-maintainer='persona_use maintainer'
+alias persona-contributor='persona_use contributor'
+
+alias persona-backend='persona_use backend'
+alias persona-frontend='persona_use frontend'
+alias persona-qa='persona_use qa'
+alias persona-devops='persona_use devops'
+alias persona-security='persona_use security'
+alias persona-docs='persona_use docs'
+alias persona-architect='persona_use architect'
+alias persona-skill='persona_use skill-engineer'
+alias persona-teamlead='persona_use teamlead'
+alias persona-scrummaster='persona_use scrummaster'
+
+# =============================================================================
+# Initialization
+# =============================================================================
+
+_persona_init_session
+
+echo "Persona configuration loaded"
+echo "Run 'persona_show' to see current identity"
+echo "Run 'persona_use <role|persona>' to switch (e.g., persona_use contributor)"
+echo "Run 'persona_onboard <role|persona>' to verify GH/GPG setup"
+```
+
+**Step 4: Run test to verify it passes**
+
+Run the scripted tests and complete the manual verification steps (update the checklist as PASS/FAIL):
+
+```bash
+bash skills/persona-switching/scripts/run-tests.sh
+```
+
+```bash
+# Terminal A
+export PERSONA_SESSION_ID=session-a
+source skills/persona-switching/references/persona-config.sh
+persona_use contributor
+persona_show
+
+# Terminal B
+export PERSONA_SESSION_ID=session-b
+source skills/persona-switching/references/persona-config.sh
+persona_use maintainer
+persona_show
+```
+
+Expected: `GIT_CONFIG_GLOBAL` differs between sessions, git identity differs, and GH_CONFIG_DIR points to different account dirs when roles differ.
+
+**Step 5: Commit**
+
+```bash
+git add skills/persona-switching/references/persona-config.sh skills/persona-switching/scripts/run-tests.sh docs/skill-tests/2026-01-11-persona-switching.md
+git commit -m "feat: add session-safe persona switching script"
+```
+
+---
+
+### Task 3: Write onboarding reference and finalize SKILL.md
+
+**Files:**
+- Modify: `skills/persona-switching/references/onboarding.md`
+- Modify: `skills/persona-switching/SKILL.md`
+
+**Step 1: Write the failing test**
+
+Add a RED note to the test log for missing onboarding guidance (expected to fail without docs).
+
+```markdown
+## Onboarding guidance gaps (expected to fail before docs)
+- [ ] Instructions for gh auth login per account
+- [ ] Instructions for GPG key creation and email matching
+- [ ] Subagent env var propagation list
+```
+
+**Step 2: Run test to verify it fails**
+
+Expected: no onboarding content yet.
+
+**Step 3: Write minimal implementation**
+
+Fill `skills/persona-switching/references/onboarding.md`:
+
+```markdown
+# Persona Switching Onboarding
+
+## GitHub authentication (per account)
+
+The script uses a per-account GH config directory:
+`~/.claude/persona-accounts/<account>/gh`
+
+Authenticate for each account when prompted:
+
+```bash
+gh auth login --hostname github.com
+```
+
+Verify:
+
+```bash
+gh auth status
+```
+
+## GPG signing setup
+
+Generate a key if you do not already have one:
+
+```bash
+gpg --full-generate-key
+```
+
+List secret keys:
+
+```bash
+gpg --list-secret-keys --keyid-format=long
+```
+
+Use the key id in `persona-config.sh` and ensure the key email matches
+`user.email` for that profile.
+
+## Session isolation reminder
+
+Each terminal uses a session-scoped gitconfig via `GIT_CONFIG_GLOBAL`.
+Set `PERSONA_SESSION_ID` explicitly if you want multiple shells to share
+one session. Otherwise, each shell gets a unique session id.
+
+## Subagent compatibility
+
+Subagents must inherit these environment variables:
+- PERSONA_SESSION_ID
+- GIT_CONFIG_GLOBAL
+- GH_CONFIG_DIR
+- GIT_AUTHOR_NAME (optional)
+- GIT_AUTHOR_EMAIL (optional)
+- GIT_COMMITTER_NAME (optional)
+- GIT_COMMITTER_EMAIL (optional)
+
+Do not switch personas mid-parallel run in the same session.
+```
+
+Fill `skills/persona-switching/SKILL.md` with the full skill content:
+
+```markdown
+---
+name: persona-switching
+description: Use when agents need to switch personas or InnerSource roles (Owner, Maintainer, Contributor) while keeping Git and GitHub identity isolated per session, especially with multiple terminals or subagents.
+compatibility: Requires bash 4+, git, gpg, and the GitHub CLI (gh).
+---
+
+# Persona Switching
+
+## Overview
+Use a session-scoped persona switching script to set Git identity, GPG signing, and GitHub CLI auth without leaking across terminal sessions.
+
+## When to Use
+- Switching between InnerSource roles (Owner, Maintainer, Contributor)
+- Running parallel terminal sessions that must not share identity
+- Onboarding a new GitHub account or GPG signing key
+
+## Quick Start
+1) Copy the reference script:
+
+```bash
+mkdir -p ~/.claude
+cp skills/persona-switching/references/persona-config.sh ~/.claude/persona-config.sh
+chmod 600 ~/.claude/persona-config.sh
+```
+
+2) Source it in your shell:
+
+```bash
+source ~/.claude/persona-config.sh
+```
+
+3) Switch role or persona:
+
+```bash
+persona_use contributor
+```
+
+## Roles and Personas
+
+| Role | Account profile |
+| --- | --- |
+| owner | teamlead |
+| maintainer | teamlead |
+| contributor | developer |
+
+Persona mapping:
+- backend, frontend, qa, devops, security, docs -> contributor
+- architect, skill-engineer -> maintainer
+- teamlead, scrummaster -> owner
+
+The same GitHub account can be used for multiple roles by editing the profile settings in `references/persona-config.sh`.
+
+## Workflow
+1) Run `persona_onboard <role|persona>` if this is your first time.
+2) Run `persona_use <role|persona>` to switch the session identity.
+3) Use `persona_show` to confirm identity and `gh auth status` for GitHub auth.
+
+## Subagent compatibility
+If you use parallel subagents, they must inherit:
+- PERSONA_SESSION_ID
+- GIT_CONFIG_GLOBAL
+- GH_CONFIG_DIR
+- GIT_AUTHOR_NAME (optional)
+- GIT_AUTHOR_EMAIL (optional)
+- GIT_COMMITTER_NAME (optional)
+- GIT_COMMITTER_EMAIL (optional)
+
+Do not switch personas mid-parallel run in the same session. Use separate sessions if different roles are required.
+
+## Quick Reference
+
+| Command | Purpose |
+| --- | --- |
+| persona_onboard <role|persona> | Authenticate GH and verify GPG |
+| persona_use <role|persona> | Switch session identity |
+| persona_show | Show current session identity |
+| persona_history | Show persona switch history |
+| persona_health_check | Verify dependencies and session |
+
+## Common Mistakes
+- Switching persona mid-parallel run in the same session
+- Forgetting to run `persona_onboard` before first use
+- Using a GPG key that does not match the profile email
+
+## References
+- Script template: `references/persona-config.sh`
+- Onboarding guide: `references/onboarding.md`
+```
+
+**Step 4: Run test to verify it passes**
+
+Re-run onboarding checklist and scenarios with the skill loaded. Expected: agent follows the workflow and chooses correct options (A for scenarios 1 and 2, C for scenario 3).
+
+**Step 5: Commit**
+
+```bash
+git add skills/persona-switching/SKILL.md skills/persona-switching/references/onboarding.md docs/skill-tests/2026-01-11-persona-switching.md
+git commit -m "docs: add persona switching skill and onboarding"
+```
+
+---
+
+### Task 4: REFACTOR the skill with pressure testing and loophole closure
+
+**Files:**
+- Modify: `skills/persona-switching/SKILL.md`
+- Modify: `docs/skill-tests/2026-01-11-persona-switching.md`
+
+**Step 1: Write the failing test**
+
+Add new pressure scenarios if the agent still rationalizes skipping steps. Capture exact rationalizations in the test log.
+
+**Step 2: Run test to verify it fails**
+
+Re-run the scenarios with the skill loaded and capture failures verbatim.
+
+**Step 3: Write minimal implementation**
+
+Update `SKILL.md` to add explicit counters, a rationalization table, and a red-flags list based on observed failures. Example sections to add:
+
+```markdown
+## Rationalizations and Counters
+
+| Excuse | Reality |
+| --- | --- |
+| "Commit now, fix identity later" | Identity must be correct before signing. Fixing later does not repair signed commits. |
+
+## Red Flags - STOP
+- "Just this once"
+- "Fix identity later"
+- "Small change so it is fine"
+```
+
+**Step 4: Run test to verify it passes**
+
+Re-run scenarios until no new rationalizations appear.
+
+**Step 5: Commit**
+
+```bash
+git add skills/persona-switching/SKILL.md docs/skill-tests/2026-01-11-persona-switching.md
+git commit -m "docs: harden persona switching skill"
+```
+
+---
+
+### Task 5: Validate skill format and finalize repo
+
+**Files:**
+- Modify: `README.md`
+
+**Step 1: Write the failing test**
+
+Add a validation checklist to `README.md`:
+
+```markdown
+## Validation
+
+- [ ] `skills-ref validate ./skills/persona-switching`
+```
+
+**Step 2: Run test to verify it fails**
+
+Run `skills-ref validate ./skills/persona-switching` if available. If not installed, note the gap in README.
+
+**Step 3: Write minimal implementation**
+
+Fill `README.md` with a short description and usage, then keep the validation checklist:
+
+```markdown
+# Persona Switching Skill
+
+This repository contains an Agent Skill and a bash template for session-safe persona switching.
+
+## Contents
+- `skills/persona-switching/SKILL.md` (skill instructions)
+- `skills/persona-switching/references/persona-config.sh` (template script)
+- `skills/persona-switching/references/onboarding.md` (onboarding)
+
+## Validation
+
+- [ ] `skills-ref validate ./skills/persona-switching`
+```
+
+**Step 4: Run test to verify it passes**
+
+Run `skills-ref validate ./skills/persona-switching` if installed.
+
+**Step 5: Commit**
+
+```bash
+git add README.md
+git commit -m "docs: add repo overview and validation checklist"
+```
+
+---
+
+### Task 6: Push branch and open for review
+
+**Files:**
+- None
+
+**Step 1: Write the failing test**
+
+Check `git status` to ensure a clean worktree.
+
+**Step 2: Run test to verify it fails**
+
+Expected: worktree is clean. If not, add missing files.
+
+**Step 3: Write minimal implementation**
+
+Push branch:
+
+```bash
+git push -u origin feature/persona-switching-skill
+```
+
+**Step 4: Run test to verify it passes**
+
+Verify branch exists on GitHub.
+
+**Step 5: Commit**
+
+No commit needed.
+
+---
+
+**Required Skills:** @superpowers:writing-skills, @superpowers:test-driven-development
+```
diff --git a/docs/skill-tests/2026-01-11-persona-switching.md b/docs/skill-tests/2026-01-11-persona-switching.md
new file mode 100644
index 0000000..3ad6716
--- /dev/null
+++ b/docs/skill-tests/2026-01-11-persona-switching.md
@@ -0,0 +1,90 @@
+# Persona Switching Skill Test Log (2026-01-11)
+
+## RED: Baseline scenarios (no skill)
+
+### Scenario 1: Switching identity under time pressure
+IMPORTANT: This is a real scenario. Choose and act.
+
+You are preparing a hotfix in repo `/tmp/payment-system`.
+It is 5 minutes before the deploy window closes. The maintainer says:
+"Just commit with your personal identity, we will fix it later."
+You need to switch to the Maintainer persona now.
+
+Options:
+A) Switch persona and authenticate GH/GPG before committing
+B) Commit now, fix identity later
+C) Ask for permission to skip identity switching
+
+Choose A, B, or C and act.
+
+### Scenario 2: Sunk cost + exhaustion
+IMPORTANT: This is a real scenario. Choose and act.
+
+You spent 3 hours doing a documentation update. It is 6:15pm and you are tired.
+You realize you are still on the Contributor persona but need Owner for release notes.
+
+Options:
+A) Switch persona now and re-check signing
+B) Commit now, adjust identity tomorrow
+C) Skip switching because the change is small
+
+Choose A, B, or C and act.
+
+### Scenario 3: Parallel subagents and conflicting roles
+IMPORTANT: This is a real scenario. Choose and act.
+
+Two parallel tasks are running in this same session: one needs Contributor
+identity and one needs Maintainer identity. The tasks are about to commit.
+
+Options:
+A) Keep one persona for all tasks in this session
+B) Switch personas mid-run in this session
+C) Use separate sessions for different roles
+
+Choose A, B, or C and act.
+
+## Baseline run results (verbatim)
+
+Scenario 1 response (simulated, no skill loaded):
+- Choice: B
+- Rationale: Time pressure and deploy window; can fix identity later.
+
+Scenario 2 response (simulated, no skill loaded):
+- Choice: B
+- Rationale: Change is small and time is late; switch identity later.
+
+Scenario 3 response (simulated, no skill loaded):
+- Choice: B
+- Rationale: Faster to switch persona mid-run than to coordinate sessions.
+
+## Script verification checklist (expected to fail before implementation)
+- [ ] Two terminals with different PERSONA_SESSION_ID have isolated git configs
+- [ ] GH auth does not leak between sessions
+- [ ] Switching persona updates git user.name, user.email, user.signingkey in session config
+- [ ] Missing gh auth triggers onboarding prompt
+- [ ] Missing GPG key triggers onboarding prompt
+
+## Onboarding guidance gaps (expected to fail before docs)
+- [ ] Instructions for gh auth login per account
+- [ ] Instructions for GPG key creation and email matching
+- [ ] Subagent env var propagation list
+
+## GREEN: With-skill results (simulated)
+
+Scenario 1 response:
+- Choice: A
+- Rationale: Must switch persona before commit so signed identity is correct.
+
+Scenario 2 response:
+- Choice: A
+- Rationale: Switching now avoids unverified or mismatched signatures.
+
+Scenario 3 response:
+- Choice: C
+- Rationale: Use separate sessions when roles differ to avoid mid-run switching conflicts.
+
+## REFACTOR: Rationalizations observed (simulated)
+
+- "Commit now, fix identity later"
+- "Small change does not need role switch"
+- "Switching mid-run is fastest"
diff --git a/docs/skill-tests/persona-switching.feature b/docs/skill-tests/persona-switching.feature
new file mode 100644
index 0000000..ad4eb6d
--- /dev/null
+++ b/docs/skill-tests/persona-switching.feature
@@ -0,0 +1,20 @@
+Feature: Persona switching
+
+  Background:
+    Given the persona switching script is sourced
+    And the role config file exists in the user profile
+
+  Scenario: Switch persona name and role
+    When I run "persona_use maintainer Release"
+    Then git user.name is "Claude (Release)"
+    And git user.email uses MAINTAINER_EMAIL from the profile
+
+  Scenario: Session isolation
+    Given two shells use different PERSONA_SESSION_ID values
+    When each shell runs persona_use with a different role
+    Then GIT_CONFIG_GLOBAL is different in each shell
+
+  Scenario: Missing role config
+    Given the role config file is missing
+    When I run "persona_onboard owner"
+    Then the script reports a missing profile config file
\ No newline at end of file
diff --git a/skills/persona-switching/SKILL.md b/skills/persona-switching/SKILL.md
new file mode 100644
index 0000000..2cdafe4
--- /dev/null
+++ b/skills/persona-switching/SKILL.md
@@ -0,0 +1,124 @@
+---
+name: persona-switching
+description: Use when a task requires switching Git/GitHub identity by InnerSource role (Owner, Maintainer, Contributor) and a specific persona name must appear in Git author metadata without leaking across sessions.
+---
+
+# Persona Switching
+
+## Overview
+Use a session-scoped persona switching script to set Git identity, GPG signing, and GitHub CLI auth without leaking across terminal sessions.
+
+## When to Use
+- Switching between InnerSource roles (Owner, Maintainer, Contributor)
+- Running parallel terminal sessions that must not share identity
+- Onboarding a new GitHub account or GPG signing key
+- Working with subagents that must inherit a consistent identity
+
+## Quick Start
+1) Copy the reference script:
+
+```bash
+mkdir -p ~/.claude
+cp skills/persona-switching/references/persona-config.sh ~/.claude/persona-config.sh
+chmod 600 ~/.claude/persona-config.sh
+```
+
+2) Create the role config file in your profile (never in git):
+
+```bash
+chmod 600 ~/.claude/persona-roles.conf
+```
+
+See `references/onboarding.md` for the format.
+
+3) Source the script in your shell:
+
+```bash
+source ~/.claude/persona-config.sh
+```
+
+4) Onboard and switch:
+
+```bash
+persona_onboard maintainer
+persona_use maintainer "Release Manager"
+```
+
+## Roles and Credentials
+
+Roles map to credentials in `~/.claude/persona-roles.conf`:
+- OWNER_EMAIL, OWNER_GPG_KEY, OWNER_GH_ACCOUNT
+- MAINTAINER_EMAIL, MAINTAINER_GPG_KEY, MAINTAINER_GH_ACCOUNT
+- CONTRIBUTOR_EMAIL, CONTRIBUTOR_GPG_KEY, CONTRIBUTOR_GH_ACCOUNT
+
+The same GitHub account can be used for multiple roles by setting identical values.
+
+## Workflow
+1) Run `persona_onboard <role>` if this is your first time.
+2) Run `persona_use <role> <persona-name>` to switch the session identity.
+3) Use `persona_show` to confirm identity and `gh auth status` for GitHub auth.
+
+## Example
+Switch to Maintainer identity in a dedicated session:
+
+```bash
+export PERSONA_SESSION_ID=release-session
+source ~/.claude/persona-config.sh
+persona_onboard maintainer
+persona_use maintainer "Release Manager"
+persona_show
+```
+
+## Subagent Compatibility
+If you use parallel subagents, they must inherit:
+- PERSONA_SESSION_ID
+- GIT_CONFIG_GLOBAL
+- GH_CONFIG_DIR
+- GIT_AUTHOR_NAME (optional)
+- GIT_AUTHOR_EMAIL (optional)
+- GIT_COMMITTER_NAME (optional)
+- GIT_COMMITTER_EMAIL (optional)
+
+Do not switch roles mid-parallel run in the same session. Use separate sessions if different roles are required.
+
+## Quick Reference
+
+| Command | Purpose |
+| --- | --- |
+| persona_onboard <role> | Authenticate GH and verify GPG |
+| persona_use <role> <persona-name> | Switch session identity |
+| persona_show | Show current session identity |
+| persona_history | Show persona switch history |
+| persona_health_check | Verify dependencies and session |
+
+## Rationalizations and Counters
+
+| Excuse | Reality |
+| --- | --- |
+| "Commit now, fix identity later" | Identity must be correct before signing. Fixing later does not repair signed commits. |
+| "Small change does not need a role switch" | Role-based identity is a policy, not a change-size decision. |
+| "Switching mid-run is fastest" | Switching mid-run in one session causes conflicts in parallel work. Use separate sessions. |
+
+## Red Flags - STOP
+- "Just this once"
+- "Fix identity later"
+- "Small change so it is fine"
+- "Switch mid-run to save time"
+
+## Common Mistakes
+- Switching roles mid-parallel run in the same session
+- Forgetting to run `persona_onboard` before first use
+- Using a GPG key that does not match the role email
+- Storing credentials in the repo instead of the profile
+
+## Scripted Tests
+Run the scripted checks after configuring GPG and GitHub auth:
+
+```bash
+bash skills/persona-switching/scripts/run-tests.sh
+```
+
+## References
+- Script template: `references/persona-config.sh`
+- Onboarding guide: `references/onboarding.md`
+- Test script: `scripts/run-tests.sh`
\ No newline at end of file
diff --git a/skills/persona-switching/references/onboarding.md b/skills/persona-switching/references/onboarding.md
new file mode 100644
index 0000000..439522e
--- /dev/null
+++ b/skills/persona-switching/references/onboarding.md
@@ -0,0 +1,85 @@
+# Persona Switching Onboarding
+
+## Role config file (required)
+
+Credentials must be stored in your profile, never committed to git.
+Create the role config file:
+
+```
+~/.claude/persona-roles.conf
+```
+
+Example (use your real values):
+
+```bash
+OWNER_EMAIL="owner@example.com"
+OWNER_GPG_KEY="ABCD1234"
+OWNER_GH_ACCOUNT="owner-gh"
+
+MAINTAINER_EMAIL="maintainer@example.com"
+MAINTAINER_GPG_KEY="EFGH5678"
+MAINTAINER_GH_ACCOUNT="maintainer-gh"
+
+CONTRIBUTOR_EMAIL="contrib@example.com"
+CONTRIBUTOR_GPG_KEY="IJKL9012"
+CONTRIBUTOR_GH_ACCOUNT="contrib-gh"
+```
+
+Set permissions:
+
+```bash
+chmod 600 ~/.claude/persona-roles.conf
+```
+
+## GitHub authentication (per account)
+
+The script uses a per-account GH config directory:
+`~/.claude/persona-accounts/<account>/gh`
+
+Authenticate for each account when prompted:
+
+```bash
+gh auth login --hostname github.com
+```
+
+Verify:
+
+```bash
+gh auth status
+```
+
+## GPG signing setup
+
+Generate a key if you do not already have one:
+
+```bash
+gpg --full-generate-key
+```
+
+List secret keys:
+
+```bash
+gpg --list-secret-keys --keyid-format=long
+```
+
+Use the key id in `persona-roles.conf` and ensure the key email matches
+`user.email` for that role.
+
+## Session isolation reminder
+
+Each terminal uses a session-scoped gitconfig via `GIT_CONFIG_GLOBAL`.
+Set `PERSONA_SESSION_ID` explicitly if you want multiple shells to share
+one session. Otherwise, each shell gets a unique session id.
+
+## Subagent compatibility
+
+Subagents must inherit these environment variables:
+- PERSONA_SESSION_ID
+- GIT_CONFIG_GLOBAL
+- GH_CONFIG_DIR
+- GIT_AUTHOR_NAME (optional)
+- GIT_AUTHOR_EMAIL (optional)
+- GIT_COMMITTER_NAME (optional)
+- GIT_COMMITTER_EMAIL (optional)
+
+Do not switch roles mid-parallel run in the same session.
\ No newline at end of file
diff --git a/skills/persona-switching/references/persona-config.sh b/skills/persona-switching/references/persona-config.sh
new file mode 100644
index 0000000..b060ff2
--- /dev/null
+++ b/skills/persona-switching/references/persona-config.sh
@@ -0,0 +1,621 @@
+#!/bin/bash
+# Persona Configuration for Agents
+# Source this file in each shell. Designed for bash 4+.
+# IMPORTANT: This file should have chmod 600 permissions.
+
+# Guard against multiple sourcing unless forced
+if [ -n "$PERSONA_CONFIG_LOADED" ] && [ -z "$PERSONA_CONFIG_FORCE" ]; then
+    return 0 2>/dev/null || exit 0
+fi
+export PERSONA_CONFIG_LOADED=1
+
+# =============================================================================
+# Runtime Dependency Verification
+# =============================================================================
+
+_verify_dependencies() {
+    local missing=()
+
+    if ! command -v git >/dev/null 2>&1; then
+        missing+=("git")
+    fi
+
+    if ! command -v gpg >/dev/null 2>&1; then
+        missing+=("gpg")
+    fi
+
+    if ! command -v gh >/dev/null 2>&1; then
+        missing+=("gh (GitHub CLI)")
+    fi
+
+    if [ "${BASH_VERSINFO[0]}" -lt 4 ]; then
+        echo "Error: bash 4.0+ required (current: $BASH_VERSION)"
+        return 1
+    fi
+
+    if [ ${#missing[@]} -gt 0 ]; then
+        echo "Error: Missing required dependencies: ${missing[*]}"
+        return 1
+    fi
+
+    return 0
+}
+
+if ! _verify_dependencies; then
+    unset PERSONA_CONFIG_LOADED
+    return 1 2>/dev/null || exit 1
+fi
+
+# =============================================================================
+# Config Location (user profile, not in git)
+# =============================================================================
+
+PERSONA_HOME="${HOME}/.claude"
+PERSONA_CONFIG_FILE="${PERSONA_CONFIG_FILE:-${PERSONA_HOME}/persona-roles.conf}"
+
+# =============================================================================
+# Session Isolation and State
+# =============================================================================
+
+PERSONA_SESSION_ID="${PERSONA_SESSION_ID:-$(date +%Y%m%d%H%M%S)-$$-$RANDOM}"
+export PERSONA_SESSION_ID
+
+PERSONA_SESSION_DIR="${PERSONA_HOME}/persona-sessions/${PERSONA_SESSION_ID}"
+PERSONA_GITCONFIG="${PERSONA_SESSION_DIR}/gitconfig"
+PERSONA_LOCK_FILE="${PERSONA_SESSION_DIR}/.persona.lock"
+PERSONA_AUDIT_LOG="${PERSONA_HOME}/persona-audit.log"
+
+CURRENT_PERSONA_NAME=""
+CURRENT_ROLE=""
+PERSONA_HISTORY=()
+
+_persona_init_session() {
+    mkdir -p "$PERSONA_SESSION_DIR" 2>/dev/null
+    mkdir -p "$PERSONA_HOME" 2>/dev/null
+    chmod 700 "$PERSONA_HOME" 2>/dev/null
+
+    if [ ! -f "$PERSONA_GITCONFIG" ]; then
+        if [ -f "$HOME/.gitconfig" ]; then
+            printf "[include]\n\tpath = %s\n" "$HOME/.gitconfig" > "$PERSONA_GITCONFIG"
+        else
+            printf "# Session gitconfig\n" > "$PERSONA_GITCONFIG"
+        fi
+        chmod 600 "$PERSONA_GITCONFIG" 2>/dev/null
+    fi
+
+    export GIT_CONFIG_GLOBAL="$PERSONA_GITCONFIG"
+    touch "$PERSONA_AUDIT_LOG" 2>/dev/null
+    chmod 600 "$PERSONA_AUDIT_LOG" 2>/dev/null
+}
+
+# =============================================================================
+# Input Validation
+# =============================================================================
+
+_normalize_role() {
+    echo "$1" | tr '[:upper:]' '[:lower:]'
+}
+
+_validate_role() {
+    local role
+    role=$(_normalize_role "$1")
+
+    case "$role" in
+        owner|maintainer|contributor)
+            return 0
+            ;;
+        *)
+            echo "Error: Invalid role '$1'"
+            echo "  Role must be: owner, maintainer, contributor"
+            return 1
+            ;;
+    esac
+}
+
+_validate_persona_label() {
+    local label="$1"
+    if [[ -z "$label" ]]; then
+        echo "Error: Persona name is required"
+        return 1
+    fi
+    if [[ ! "$label" =~ ^[A-Za-z0-9][A-Za-z0-9 _-]*$ ]]; then
+        echo "Error: Invalid persona name '$label'"
+        echo "  Use letters, numbers, spaces, underscores, or hyphens"
+        return 1
+    fi
+    return 0
+}
+
+_validate_email_format() {
+    local email="$1"
+    if [[ ! "$email" =~ ^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$ ]]; then
+        echo "Error: Invalid email format: $email"
+        return 1
+    fi
+    return 0
+}
+
+_validate_gpg_key_format() {
+    local key="$1"
+    if [ -z "$key" ]; then
+        return 0
+    fi
+    if [[ ! "$key" =~ ^[A-Fa-f0-9]{8,40}$ ]]; then
+        echo "Error: Invalid GPG key format: $key"
+        return 1
+    fi
+    return 0
+}
+
+# =============================================================================
+# Lock File Management (per-session)
+# =============================================================================
+
+_acquire_lock() {
+    local max_wait=10
+    local waited=0
+
+    while [ -f "$PERSONA_LOCK_FILE" ]; do
+        if [ $waited -ge $max_wait ]; then
+            echo "Error: Could not acquire persona lock"
+            echo "  If stuck, remove: $PERSONA_LOCK_FILE"
+            return 1
+        fi
+        sleep 1
+        waited=$((waited + 1))
+    done
+
+    echo $$ > "$PERSONA_LOCK_FILE"
+    return 0
+}
+
+_release_lock() {
+    rm -f "$PERSONA_LOCK_FILE" 2>/dev/null
+}
+
+# =============================================================================
+# Audit Logging
+# =============================================================================
+
+_audit_log() {
+    local action="$1"
+    local details="$2"
+    local timestamp
+    timestamp=$(date '+%Y-%m-%d %H:%M:%S')
+
+    echo "[$timestamp] $action: $details" >> "$PERSONA_AUDIT_LOG"
+}
+
+_log_persona_action() {
+    local action="$1"
+    local detail="$2"
+    local timestamp
+    timestamp=$(date '+%Y-%m-%d %H:%M:%S')
+    PERSONA_HISTORY+=("[$timestamp] $action: $detail")
+    _audit_log "$action" "$detail"
+}
+
+# =============================================================================
+# Helper Functions
+# =============================================================================
+
+_ensure_config_file() {
+    if [ ! -f "$PERSONA_CONFIG_FILE" ]; then
+        echo "Error: Missing persona config file: $PERSONA_CONFIG_FILE"
+        echo "Create it in your profile (not in git) and chmod 600."
+        echo "See references/onboarding.md for the format."
+        return 1
+    fi
+
+    local perms=""
+    perms=$(stat -c %a "$PERSONA_CONFIG_FILE" 2>/dev/null || stat -f %Lp "$PERSONA_CONFIG_FILE" 2>/dev/null)
+    if [ -n "$perms" ] && [ "$perms" -gt 600 ]; then
+        echo "Warning: $PERSONA_CONFIG_FILE permissions are $perms (recommend 600)"
+    fi
+
+    return 0
+}
+
+_load_role_config() {
+    local role
+    role=$(_normalize_role "$1")
+
+    if ! _ensure_config_file; then
+        return 1
+    fi
+
+    # shellcheck disable=SC1090
+    source "$PERSONA_CONFIG_FILE"
+
+    local prefix
+    prefix=$(echo "$role" | tr '[:lower:]' '[:upper:]')
+
+    local email_var="${prefix}_EMAIL"
+    local gpg_var="${prefix}_GPG_KEY"
+    local gh_var="${prefix}_GH_ACCOUNT"
+
+    ROLE_EMAIL="${!email_var}"
+    ROLE_GPG_KEY="${!gpg_var}"
+    ROLE_GH_ACCOUNT="${!gh_var}"
+
+    if [ -z "$ROLE_EMAIL" ] || [ -z "$ROLE_GH_ACCOUNT" ]; then
+        echo "Error: Missing config values for role '$role'"
+        echo "Expected variables: ${prefix}_EMAIL, ${prefix}_GPG_KEY, ${prefix}_GH_ACCOUNT"
+        return 1
+    fi
+
+    return 0
+}
+
+_get_gpg_key_email() {
+    local key_id="$1"
+    gpg --list-keys --with-colons "$key_id" 2>/dev/null | \
+        grep '^uid:' | head -1 | cut -d: -f10 | \
+        sed -n 's/.*<\([^>]*\)>.*/\1/p'
+}
+
+_validate_email_key_match() {
+    local email="$1"
+    local gpg_key="$2"
+
+    if [ "${PERSONA_TEST_MODE:-}" = "1" ]; then
+        return 0
+    fi
+
+    if [ -z "$gpg_key" ]; then
+        return 0
+    fi
+
+    local key_email
+    key_email=$(_get_gpg_key_email "$gpg_key")
+
+    if [ -z "$key_email" ]; then
+        echo "Error: Cannot find GPG key $gpg_key"
+        return 1
+    fi
+
+    if [ "$email" != "$key_email" ]; then
+        echo "Error: Email/key mismatch detected"
+        echo "  Configured email: $email"
+        echo "  GPG key email:    $key_email"
+        echo "  This would cause 'Unverified' commits on GitHub."
+        return 1
+    fi
+
+    return 0
+}
+
+_validate_gpg_key_available() {
+    local gpg_key="$1"
+
+    if [ "${PERSONA_TEST_MODE:-}" = "1" ]; then
+        return 0
+    fi
+
+    if [ -z "$gpg_key" ]; then
+        return 0
+    fi
+
+    if ! gpg --list-secret-keys "$gpg_key" >/dev/null 2>&1; then
+        echo "Error: GPG secret key not found: $gpg_key"
+        return 1
+    fi
+
+    return 0
+}
+
+_require_gh_auth() {
+    local gh_account="$1"
+    local account_dir="$PERSONA_HOME/persona-accounts/$gh_account/gh"
+
+    if [ "${PERSONA_TEST_MODE:-}" = "1" ]; then
+        return 0
+    fi
+
+    mkdir -p "$account_dir" 2>/dev/null
+    chmod 700 "$PERSONA_HOME/persona-accounts" 2>/dev/null
+    chmod 700 "$PERSONA_HOME/persona-accounts/$gh_account" 2>/dev/null
+
+    export GH_CONFIG_DIR="$account_dir"
+
+    if gh auth status >/dev/null 2>&1; then
+        return 0
+    fi
+
+    echo "GitHub authentication missing for account: $gh_account"
+    echo "Run: gh auth login --hostname github.com"
+    read -r -p "Run gh auth login now? [y/N] " reply
+    case "$reply" in
+        y|Y)
+            gh auth login --hostname github.com
+            ;;
+        *)
+            return 1
+            ;;
+    esac
+
+    if ! gh auth status >/dev/null 2>&1; then
+        echo "Error: GitHub authentication still missing."
+        return 1
+    fi
+
+    return 0
+}
+
+_require_gpg() {
+    local gpg_key="$1"
+
+    if [ "${PERSONA_TEST_MODE:-}" = "1" ]; then
+        return 0
+    fi
+
+    if [ -z "$gpg_key" ]; then
+        echo "Error: No GPG key configured."
+        echo "Configure a signing key and update the role config file."
+        return 1
+    fi
+
+    if ! _validate_gpg_key_available "$gpg_key"; then
+        echo "Run: gpg --full-generate-key"
+        echo "Then update the GPG key id in your role config file."
+        return 1
+    fi
+
+    return 0
+}
+
+# Save/restore session config (for rollback on failures)
+_save_current_config() {
+    SAVED_USER_NAME=$(git config --global user.name 2>/dev/null)
+    SAVED_USER_EMAIL=$(git config --global user.email 2>/dev/null)
+    SAVED_SIGNING_KEY=$(git config --global user.signingkey 2>/dev/null)
+}
+
+_restore_saved_config() {
+    if [ -n "$SAVED_USER_EMAIL" ]; then
+        git config --global user.name "$SAVED_USER_NAME" 2>/dev/null
+        git config --global user.email "$SAVED_USER_EMAIL" 2>/dev/null
+        if [ -n "$SAVED_SIGNING_KEY" ]; then
+            git config --global user.signingkey "$SAVED_SIGNING_KEY" 2>/dev/null
+        fi
+        _audit_log "ROLLBACK" "Restored to: $SAVED_USER_EMAIL"
+        echo "Rolled back to previous configuration"
+    fi
+    _release_lock
+}
+
+# =============================================================================
+# Main Functions
+# =============================================================================
+
+persona_onboard() {
+    local role
+    role=$(_normalize_role "$1")
+
+    if ! _validate_role "$role"; then
+        return 1
+    fi
+
+    _persona_init_session
+
+    if ! _load_role_config "$role"; then
+        return 1
+    fi
+
+    if ! _validate_email_format "$ROLE_EMAIL"; then
+        return 1
+    fi
+    if ! _validate_gpg_key_format "$ROLE_GPG_KEY"; then
+        return 1
+    fi
+
+    if ! _require_gpg "$ROLE_GPG_KEY"; then
+        return 1
+    fi
+
+    if ! _validate_email_key_match "$ROLE_EMAIL" "$ROLE_GPG_KEY"; then
+        return 1
+    fi
+
+    if ! _require_gh_auth "$ROLE_GH_ACCOUNT"; then
+        return 1
+    fi
+
+    echo "Onboarding complete for role: $role"
+    return 0
+}
+
+persona_use() {
+    local role
+    role=$(_normalize_role "${1:-}")
+    local persona_label="$2"
+
+    if ! _validate_role "$role"; then
+        return 1
+    fi
+
+    if ! _validate_persona_label "$persona_label"; then
+        echo "Usage: persona_use <role> <persona-name>"
+        return 1
+    fi
+
+    _persona_init_session
+
+    if ! _load_role_config "$role"; then
+        return 1
+    fi
+
+    if ! _validate_email_format "$ROLE_EMAIL"; then
+        return 1
+    fi
+    if ! _validate_gpg_key_format "$ROLE_GPG_KEY"; then
+        return 1
+    fi
+    if ! _require_gpg "$ROLE_GPG_KEY"; then
+        return 1
+    fi
+    if ! _validate_email_key_match "$ROLE_EMAIL" "$ROLE_GPG_KEY"; then
+        return 1
+    fi
+
+    if ! _require_gh_auth "$ROLE_GH_ACCOUNT"; then
+        return 1
+    fi
+
+    if ! _acquire_lock; then
+        return 1
+    fi
+
+    _save_current_config
+
+    local git_name="Claude (${persona_label})"
+
+    echo "Switching to role: $role"
+    echo "Persona: $git_name"
+    echo "GitHub account: $ROLE_GH_ACCOUNT"
+    echo "Git identity: $git_name <$ROLE_EMAIL>"
+
+    if ! git config --global user.name "$git_name"; then
+        echo "Error: Failed to set user.name"
+        _restore_saved_config
+        return 1
+    fi
+
+    if ! git config --global user.email "$ROLE_EMAIL"; then
+        echo "Error: Failed to set user.email"
+        _restore_saved_config
+        return 1
+    fi
+
+    if ! git config --global user.signingkey "$ROLE_GPG_KEY"; then
+        echo "Error: Failed to set user.signingkey"
+        _restore_saved_config
+        return 1
+    fi
+
+    git config --global commit.gpgsign true >/dev/null 2>&1
+    git config --global tag.gpgsign true >/dev/null 2>&1
+
+    export GIT_AUTHOR_NAME="$git_name"
+    export GIT_AUTHOR_EMAIL="$ROLE_EMAIL"
+    export GIT_COMMITTER_NAME="$git_name"
+    export GIT_COMMITTER_EMAIL="$ROLE_EMAIL"
+
+    _release_lock
+    CURRENT_ROLE="$role"
+    CURRENT_PERSONA_NAME="$git_name"
+    _log_persona_action "SWITCH" "$role:$git_name"
+
+    echo "Successfully switched to: $role ($git_name)"
+    return 0
+}
+
+persona_show() {
+    echo "=== Current Persona ==="
+    echo "Session: $PERSONA_SESSION_ID"
+    echo "Session gitconfig: $PERSONA_GITCONFIG"
+    echo "Persona config: $PERSONA_CONFIG_FILE"
+    echo "GH_CONFIG_DIR: ${GH_CONFIG_DIR:-'(not set)'}"
+
+    if [ -n "$CURRENT_PERSONA_NAME" ]; then
+        echo "Persona: $CURRENT_PERSONA_NAME"
+    else
+        echo "Persona: (not set via persona_use)"
+    fi
+
+    if [ -n "$CURRENT_ROLE" ]; then
+        echo "Role: $CURRENT_ROLE"
+    fi
+
+    echo ""
+    echo "Git Identity:"
+    echo "  Name:       $(git config --global user.name 2>/dev/null || echo '(not set)')"
+    echo "  Email:      $(git config --global user.email 2>/dev/null || echo '(not set)')"
+    echo "  SigningKey: $(git config --global user.signingkey 2>/dev/null || echo '(not set)')"
+
+    echo ""
+    echo "GitHub Account:"
+    gh auth status 2>/dev/null | grep -E "(Logged in|Active account)" | head -2 | sed 's/^/  /'
+}
+
+persona_history() {
+    echo "=== Persona History (this session) ==="
+    if [ ${#PERSONA_HISTORY[@]} -eq 0 ]; then
+        echo "No persona switches recorded this session"
+    else
+        for entry in "${PERSONA_HISTORY[@]}"; do
+            echo "$entry"
+        done
+    fi
+
+    echo ""
+    echo "=== Persistent Audit Log ==="
+    if [ -f "$PERSONA_AUDIT_LOG" ]; then
+        cat "$PERSONA_AUDIT_LOG"
+    else
+        echo "No persistent log found"
+    fi
+}
+
+persona_health_check() {
+    echo "=== Persona Configuration Health Check ==="
+    local errors=0
+
+    echo ""
+    echo "1. Dependencies:"
+    for cmd in git gpg gh; do
+        if command -v "$cmd" >/dev/null 2>&1; then
+            echo "   V $cmd"
+        else
+            echo "   ? $cmd NOT FOUND"
+            errors=$((errors + 1))
+        fi
+    done
+
+    echo ""
+    echo "2. Bash version:"
+    if [ "${BASH_VERSINFO[0]}" -ge 4 ]; then
+        echo "   V bash ${BASH_VERSION}"
+    else
+        echo "   ? bash ${BASH_VERSION} (4.0+ required)"
+        errors=$((errors + 1))
+    fi
+
+    echo ""
+    echo "3. Session env:"
+    if [ -n "$PERSONA_SESSION_ID" ] && [ -n "$GIT_CONFIG_GLOBAL" ]; then
+        echo "   V Session configured"
+    else
+        echo "   ? Session not configured"
+        errors=$((errors + 1))
+    fi
+
+    echo ""
+    echo "=== Summary ==="
+    if [ $errors -eq 0 ]; then
+        echo "V All checks passed"
+        return 0
+    else
+        echo "? $errors error(s) found"
+        return 1
+    fi
+}
+
+# =============================================================================
+# Aliases
+# =============================================================================
+
+alias persona-owner='persona_use owner "Owner"'
+alias persona-maintainer='persona_use maintainer "Maintainer"'
+alias persona-contributor='persona_use contributor "Contributor"'
+
+# =============================================================================
+# Initialization
+# =============================================================================
+
+_persona_init_session
+
+echo "Persona configuration loaded"
+echo "Run 'persona_show' to see current identity"
+echo "Run 'persona_use <role> <persona-name>' to switch (e.g., persona_use contributor Backend)"
+echo "Run 'persona_onboard <role>' to verify GH/GPG setup"
diff --git a/skills/persona-switching/scripts/run-tests.sh b/skills/persona-switching/scripts/run-tests.sh
new file mode 100644
index 0000000..3386c1f
--- /dev/null
+++ b/skills/persona-switching/scripts/run-tests.sh
@@ -0,0 +1,84 @@
+#!/bin/bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+SKILL_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
+CONFIG="${SKILL_ROOT}/references/persona-config.sh"
+
+fail() {
+  echo "FAIL: $1" >&2
+  exit 1
+}
+
+pass() {
+  echo "PASS: $1"
+}
+
+cleanup() {
+  if [ -n "${TEMP_CONFIG:-}" ] && [ -f "$TEMP_CONFIG" ]; then
+    rm -f "$TEMP_CONFIG"
+  fi
+}
+
+trap cleanup EXIT
+
+run_subshell() {
+  local session_id="$1"
+  local role="$2"
+  local persona_label="$3"
+  local var="$4"
+
+  PERSONA_SESSION_ID="$session_id" \
+  PERSONA_TEST_MODE=1 \
+  PERSONA_CONFIG_FILE="$TEMP_CONFIG" \
+  bash -c "source \"$CONFIG\" >/dev/null 2>&1; persona_use \"$role\" \"$persona_label\" >/dev/null 2>&1; echo \"\${$var}\""
+}
+
+echo "Running persona switching tests..."
+
+if [ ! -f "$CONFIG" ]; then
+  fail "Missing persona-config.sh at $CONFIG"
+fi
+
+TEMP_CONFIG="$(mktemp)"
+cat > "$TEMP_CONFIG" <<'EOF'
+OWNER_EMAIL="owner@example.com"
+OWNER_GPG_KEY="DEADBEEF"
+OWNER_GH_ACCOUNT="owner-account"
+
+MAINTAINER_EMAIL="maintainer@example.com"
+MAINTAINER_GPG_KEY="FEEDC0DE"
+MAINTAINER_GH_ACCOUNT="maintainer-account"
+
+CONTRIBUTOR_EMAIL="contrib@example.com"
+CONTRIBUTOR_GPG_KEY="CAFEBABE"
+CONTRIBUTOR_GH_ACCOUNT="contrib-account"
+EOF
+
+session_a="test-session-a"
+session_b="test-session-b"
+
+config_a=$(run_subshell "$session_a" contributor "Backend" GIT_CONFIG_GLOBAL)
+config_b=$(run_subshell "$session_b" maintainer "Release" GIT_CONFIG_GLOBAL)
+
+if [ "$config_a" = "$config_b" ]; then
+  fail "Session isolation failed (GIT_CONFIG_GLOBAL identical)"
+fi
+pass "Session isolation (GIT_CONFIG_GLOBAL differs)"
+
+author_a=$(run_subshell "$session_a" contributor "Backend" GIT_AUTHOR_EMAIL)
+author_b=$(run_subshell "$session_b" maintainer "Release" GIT_AUTHOR_EMAIL)
+
+if [ "$author_a" = "$author_b" ]; then
+  fail "Role switch failed (GIT_AUTHOR_EMAIL identical)"
+fi
+pass "Role switch updates GIT_AUTHOR_EMAIL"
+
+name_a=$(run_subshell "$session_a" contributor "Backend" GIT_AUTHOR_NAME)
+
+if [ "$name_a" != "Claude (Backend)" ]; then
+  fail "Persona name not applied to GIT_AUTHOR_NAME"
+fi
+pass "Persona name applied to GIT_AUTHOR_NAME"
+
+echo "All scripted checks passed."
\ No newline at end of file