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+# 🏗️ Document d'architecture — agent-manager (`am`)
+
+> Ce document décrit la conception, le fonctionnement et les fonctionnalités de **agent-manager** (binaire `am`), un CLI Rust multiplateforme pour gérer des agents IA de coding locaux.
+>
+> 📦 Version : `0.4.2` · 🦀 Rust 2021 · ✅ Windows · ✅ Linux · ✅ macOS
+
+---
+
+## 🎯 Vue d'ensemble
+
+`am` est un gestionnaire d'agents IA de coding qui permet de :
+
+- 📋 Découvrir et lister plus de **72 agents** via un catalogue YAML embarqué
+- 📦 Les installer avec **9 méthodes** différentes (npm, pip, uv, cargo, go, bun, curl, binaire, git)
+- 🚀 Les démarrer, arrêter, redémarrer en avant-plan ou en arrière-plan
+- 🔍 Observer leur état, leurs logs, leurs statistiques d'utilisation
+- 🛠️ Gérer dépendances, alias, groupes, profils, secrets, favoris et annotations
+
+Le tout sans toucher au système : chaque agent est installé dans un répertoire utilisateur isolé.
+
+---
+
+## 🧩 Architecture globale
+
+```mermaid
+flowchart TB
+    subgraph UI["🖥️ Interfaces utilisateur"]
+        CLI["Ligne de commande<br/>clap v4"]
+        REPL["Shell interactif<br/>rustyline"]
+        TUI["Dashboard TUI<br/>ratatui + crossterm"]
+    end
+
+    subgraph CORE["⚙️ Noyau applicatif"]
+        APP["App<br/>contexte partagé"]
+        CLI_DEF["cli.rs<br/>définition des commandes"]
+        CMD["commands/<br/>dispatch"]
+    end
+
+    subgraph DATA["💾 Données persistantes"]
+        CONFIG["Configuration YAML<br/>embarquée + utilisateur"]
+        CATALOG["Catalog<br/>index agents/alias/groupes"]
+        STATE["StateStore<br/>state.json"]
+        EVENTS["Journal JSONL<br/>events-YYYYMM.jsonl"]
+        CACHE["Probe cache<br/>probe-cache.json"]
+    end
+
+    subgraph EXEC["🔧 Exécution"]
+        RUNNER["Runner trait<br/>système / mock"]
+        INSTALLERS["installers/<br/>9 méthodes"]
+        DEPS["deps.rs<br/>vérification dépendances"]
+        PROCESS["process.rs<br/>PID / signaux"]
+    end
+
+    subgraph OBS["👁️ Observation"]
+        PROBE["probe.rs<br/>détection agents externes"]
+        DASH["dashboard.rs<br/>agrégation"]
+        STATS["stats.rs<br/>statistiques"]
+        SESSIONS["sessions.rs<br/>registre sessions"]
+    end
+
+    CLI --> APP
+    REPL --> APP
+    TUI --> APP
+    APP --> CLI_DEF
+    APP --> CONFIG
+    APP --> CATALOG
+    APP --> STATE
+    APP --> EVENTS
+    APP --> CACHE
+    CMD --> RUNNER
+    CMD --> INSTALLERS
+    CMD --> DEPS
+    CMD --> PROCESS
+    CMD --> PROBE
+    CMD --> DASH
+    CMD --> STATS
+    CMD --> SESSIONS
+```
+
+---
+
+## 🚀 Flux d'exécution d'une commande
+
+```mermaid
+sequenceDiagram
+    autonumber
+    participant User
+    participant main as main.rs
+    participant lib as lib.rs
+    participant help as help.rs
+    participant cli as cli.rs
+    participant app as app.rs
+    participant cfg as config.rs
+    participant state as state.rs
+    participant cmd as commands/mod.rs
+    participant impl as commands/xxx_cmd.rs
+
+    User->>main: am install jcode
+    main->>lib: main_entry()
+    lib->>lib: spawn thread 8 Mo
+    lib->>help: intercept(-h/--help) ?
+    help-->>lib: None
+    lib->>cli: Cli::parse()
+    cli-->>lib: Cli { command: Install {...} }
+    lib->>app: App::from_cli(cli)
+    app->>cfg: load() config embarquée + user
+    cfg-->>app: Config
+    app->>state: StateStore::new()
+    state-->>app: state.json chargé
+    app-->>lib: App
+    lib->>cmd: commands::execute(&app)
+    cmd->>impl: install_cmd::run(...)
+    impl->>impl: vérifier dépendances, installer
+    impl->>state: persister
+    impl->>app: emit(event install)
+    impl-->>cmd: Ok(0)
+    cmd-->>lib: 0
+    lib-->>main: code sortie
+```
+
+---
+
+## 📁 Structure du code source
+
+```
+src/
+├── main.rs              🚪 Point d'entrée
+├── lib.rs               🧭 main_entry(), doc du crate
+├── cli.rs               📋 Définition clap de toutes les commandes
+├── app.rs               🧰 Contexte App (config, state, paths, logger, theme)
+├── config.rs            ⚙️ Schéma YAML, chargement, fusion, validation
+├── catalog.rs           🔍 Index agents + recherche fuzzy + suggestions
+├── state.rs             💾 Base JSON des installations et annotations
+├── events.rs            📝 Journal d'événements JSONL
+├── runner.rs            🏃 Trait d'exécution système / mock
+├── process.rs           ⚙️ Lancement, arrêt, signaux des processus
+├── deps.rs              ✅ Vérification et auto-installation des dépendances
+├── toolchain.rs         🖥️ Détection OS / gestionnaire de paquets
+├── download.rs          ⬇️ Téléchargement, checksums, extraction
+├── probe.rs             🔎 Détection des agents externes sur le PATH
+├── dashboard.rs         📊 Données agrégées du dashboard
+├── ps.rs                🧮 Table des processus
+├── context.rs           📂 Contexte du projet courant
+├── repl.rs              💬 Shell interactif
+├── shell.rs             🐚 Gestion des shells supportés
+├── help.rs              ❓ Aide Nushell-style
+├── output.rs            🖨️ Logger et rendu
+├── tables.rs            📋 Rendu tabulaire
+├── theme.rs             🎨 Thèmes de couleur
+├── history.rs           ⏪ Historique des commandes
+├── sessions.rs          📅 Registre des sessions
+├── projects.rs          🗂️️ Agrégation par projet
+├── hooks.rs             🪝 Hooks de cycle de vie
+├── secrets.rs           🔒 Gestion des secrets (keyring OS)
+├── version.rs           🏷️ Informations de version
+├── commands/            📦 35 modules, un par commande
+└── installers/          📦 9 installateurs spécialisés
+```
+
+---
+
+## ⚙️ Configuration : catalogue YAML extensible
+
+### Hiérarchie de chargement
+
+```mermaid
+flowchart LR
+    EMB["📦 config.yaml<br/>embarqué dans le binaire"] --> MERGE["🔀 Fusion"]
+    USER["👤 ~/.config/agent-manager/config.yaml"] --> MERGE
+    LOCAL["📂 ./agent-manager.yaml"] --> MERGE
+    FLAG["⚡ --config <file>"] --> MERGE
+    MERGE --> EFFECTIVE["✅ Configuration effective"]
+```
+
+Priorité (la plus prioritaire en dernier) :
+
+1. `config.yaml` embarqué (catalogue par défaut, ~72 agents)
+2. `~/.config/agent-manager/config.yaml`
+3. `./agent-manager.yaml` (configuration locale par projet)
+4. `--config <fichier>`
+
+### Schéma de configuration
+
+```yaml
+version: "1.0"
+
+settings:
+  install_dir: null            # ~/.local/share/agent-manager/agents
+  log_dir: null                # ~/.local/state/agent-manager/logs
+  default_shell: null          # shell utilisateur par défaut
+  auto_install_deps: true      # proposer d'installer les dépendances manquantes
+  confirm_before_run: true     # confirmer avant les scripts d'installation
+  stop_timeout_secs: 5         # délai SIGTERM → SIGKILL
+  self_update_repo: Projets/agent-manager
+  self_update_base_url: https://git.dracodev.net/api/v1
+  theme: null
+  hooks:
+    on_install: []
+    on_start: []
+    on_stop: []
+    on_update: []
+
+aliases:
+  cc: claude-code
+  gemini: gemini-cli
+
+groups:
+  dev: [claude-code, aider, codex]
+
+include:
+  - ./extra-agents.yaml
+
+agents:
+  - name: claude-code
+    display_name: "Claude Code"
+    description: "..."
+    category: coding-agent
+    website: https://github.com/anthropics/claude-code
+    install:
+      type: npm
+      package: "@anthropic-ai/claude-code"
+    dependencies:
+      - { name: node, min_version: "18.0.0" }
+    run: claude
+    tags: [anthropic, assistant]
+
+profiles:
+  dev:
+    agent: claude-code
+    env: { API_ENV: dev }
+    args: [--verbose]
+
+projects:
+  mon-projet:
+    root: ~/projets/mon-projet
+    default_agent: claude-code
+    env: { KEY: value }
+```
+
+### Définition d'un agent (`AgentDef`)
+
+| Champ | Description |
+|-------|-------------|
+| `name` | Identifiant unique (slug) |
+| `display_name` | Nom lisible |
+| `description` | Description longue |
+| `category` | Catégorie (coding-agent, assistant, local-first...) |
+| `website` | URL du projet |
+| `install` | Spécification d'installation |
+| `dependencies` | Outils requis (node, python, go...) avec version min |
+| `run` | Commande de lancement |
+| `args` | Arguments par défaut |
+| `env` | Variables d'environnement par défaut |
+| `tags` | Tags pour recherche/filtrage |
+| `installable` | `false` pour les agents SaaS/Desktop |
+| `platforms` | Restriction `linux`/`macos`/`windows` |
+
+### Méthodes d'installation supportées
+
+| Type | Fichier | Principe |
+|------|---------|----------|
+| `npm` | `installers/npm.rs` | `npm install -g --prefix <root>` |
+| `bun` | `installers/npm.rs` | `bun install -g` |
+| `pip` / `uv` | `installers/pipuv.rs` | virtualenv privé dans `install_dir` |
+| `cargo` | `installers/cargo.rs` | `cargo install --root` |
+| `go` | `installers/golang.rs` | `go install` avec `GOBIN` local |
+| `curl` | `installers/script.rs` | Télécharge et exécute un script |
+| `binary` | `installers/binary.rs` | Release GitHub/Gitea → extraction archive |
+| `git` | `installers/git.rs` | Clone + build + `binary_path` |
+
+---
+
+## 💾 Gestion des états
+
+### `state.json` — base d'installation locale
+
+Format JSON version 3, atomique (écriture `.tmp` + `rename`).
+
+```json
+{
+  "version": 3,
+  "installed": {
+    "jcode": {
+      "name": "jcode",
+      "version": "0.76.0",
+      "method": "binary",
+      "directory": ".../agents/jcode",
+      "binaries": ["jcode"],
+      "pid": null,
+      "installed_at": "...",
+      "updated_at": "..."
+    }
+  },
+  "annotations": {
+    "jcode": {
+      "favorite": true,
+      "note": "mon agent préféré",
+      "tags": ["perso"]
+    }
+  }
+}
+```
+
+### Journal d'événements JSONL
+
+- Un fichier par mois : `events-YYYYMM.jsonl`
+- Append-only, horodaté
+- Types d'événements : `start`, `stop`, `run`, `install`, `update`, `uninstall`, `doctor`, `config`, `repl`, `shell`, `annotate`
+- Les secrets ne sont jamais journalisés
+- Source de vérité pour les statistiques, sessions, projets et timeline
+
+### Cache de sondes
+
+`probe-cache.json` évite de re-scanner le PATH à chaque commande pour détecter les agents externes et leurs versions.
+
+---
+
+## 🛡️ Gestion des dépendances
+
+```mermaid
+flowchart LR
+    INSTALL["am install jcode"] --> CHECK["deps::check_dep"]
+    CHECK --> MISSING{Manquant ?}
+    MISSING -->|Oui| DETECT["toolchain::detect OS"]
+    DETECT --> COMMANDS["toolchain::install_commands"]
+    COMMANDS --> PROMPT["Proposer la commande"]
+    PROMPT --> AUTO["Exécuter si --yes"]
+    AUTO --> INSTALL2["installers::run_install"]
+    MISSING -->|Non| INSTALL2
+```
+
+- `deps.rs` vérifie chaque dépendance via `<outil> --version`
+- `toolchain.rs` détecte l'OS et le gestionnaire de paquets :
+  - Windows : `scoop` → `winget`
+  - Linux : `apt` / `dnf` / `pacman` / `apk`
+  - macOS : `brew`
+- Si `auto_install_deps: true`, `am` propose et peut exécuter la commande d'installation
+- Les dépendances de l'agent (modules npm/pip) restent isolées dans le répertoire `install_dir`
+
+---
+
+## ⚡ Gestion des processus
+
+```mermaid
+flowchart TB
+    START["am start <agent>"] --> MODE{Mode ?}
+    MODE -->|Foreground| FG["Attache au terminal<br/>Ctrl-C pour quitter"]
+    MODE -->|Background| BG["spawn_background()"]
+    BG --> LOG["Redirection stdout/stderr<br/>vers log agent"]
+    LOG --> PID["Enregistrement PID<br/>dans state.json"]
+    PID --> EVENT["Émission événement start"]
+
+    STOP["am stop <agent>"] --> SIGTERM["SIGTERM"]
+    SIGTERM --> WAIT{"Processus terminé ?"}
+    WAIT -->|Non| SIGKILL["SIGKILL après timeout"]
+    WAIT -->|Oui| CLEAN["PID effacé"]
+```
+
+- Démarrage avant-plan (`-f`) ou arrière-plan (`-b`, `--background`)
+- Variables d'environnement injectées via `--env KEY=VALUE`
+- Secrets via `--env KEY=@secret` (résolu depuis le trousseau OS)
+- Arrêt gracieux avec timeout configurable (défaut 5 s)
+- Notifications desktop optionnelles (`--notify`)
+
+---
+
+## 📋 Commandes détaillées
+
+### 🔍 Découvrir
+
+| Commande | Description |
+|----------|-------------|
+| `am list` | Agents installés + détectés sur le PATH |
+| `am list --all` | Tout le catalogue avec état |
+| `am search <mot>` | Recherche fuzzy avec suggestions |
+| `am info <agent>` | Fiche détaillée |
+| `am status [agent]` | État, version, PID, logs |
+
+### 📦 Cycle de vie
+
+| Commande | Description |
+|----------|-------------|
+| `am install <agent>` | Installe un agent et ses dépendances |
+| `am install <agent> --method pip` | Choisit la méthode |
+| `am uninstall <agent> [--purge]` | Désinstalle et nettoie |
+| `am update <agent>` / `--all` | Met à jour |
+| `am start [agent]` | Lance en avant-plan |
+| `am start <agent> -b` | Lance en arrière-plan |
+| `am stop <agent>` | Arrêt gracieux |
+| `am restart <agent>` | Redémarrage |
+| `am run <agent> [args...]` | Exécution directe sans gestion de PID |
+
+### 👁️ Observer
+
+| Commande | Description |
+|----------|-------------|
+| `am logs <agent>` | Tail du log agent |
+| `am log [agent]` | Journal des événements `am` |
+| `am timeline` | Vue chronologique unifiée |
+| `am sessions [agent]` | Registre des sessions |
+| `am stats [agent] --period 7d` | Statistiques d'utilisation |
+| `am top --period 30d` | Top 10 agents |
+| `am report --last-week` | Rapport markdown |
+| `am projects [nom]` | Agents par projet |
+| `am dashboard` | Dashboard TUI temps réel |
+| `am watch <agent> --restart` | Supervision et relance automatique |
+
+### 🎯 Personnaliser
+
+| Commande | Description |
+|----------|-------------|
+| `am favorite <agent>` | Marquer comme favori |
+| `am note <agent> <texte>` | Ajouter une note |
+| `am tag <agent> <tag>` | Taguer |
+| `am tags [agent]` | Lister les tags |
+| `am profile list/show <name>` | Profils d'environnement |
+| `am alias add <nom> <cible>` | Créer un alias |
+| `am secret set <nom> --agent <a> --value <v>` | Secret dans le trousseau |
+
+### 🛠️ Système
+
+| Commande | Description |
+|----------|-------------|
+| `am doctor [--fix]` | Diagnostic environnement |
+| `am config show/path/edit/validate/set` | Gestion config |
+| `am completion <shell>` | Script de complétion |
+| `am man [commande]` | Page de manuel |
+| `am open <agent>` | Ouvrir le répertoire d'installation |
+| `am export/import` | Sauvegarde/restauration |
+| `am self-update [--check]` | Mise à jour de `am` |
+| `am self-uninstall` | Désinstallation complète |
+| `am version` | Version et build |
+| `am` (sans commande) | REPL interactif |
+
+---
+
+## 🌐 Options globales
+
+Disponibles avant ou après la sous-commande.
+
+| Option | Effet |
+|--------|-------|
+| `-c, --config <FILE>` | Fichier de configuration alternatif |
+| `-v, --verbose` | Affiche chaque commande exécutée |
+| `-q, --quiet` | Seules les erreurs sont affichées |
+| `-y, --yes` | Oui à toutes les confirmations |
+| `--dry-run` | Simulation sans modification |
+| `--json` | Sortie JSON structurée |
+| `--no-color` | Désactive les couleurs |
+| `--theme <THEME>` | Thème de couleur |
+
+---
+
+## 🎨 Fonctionnalités avancées
+
+### Alias
+
+```yaml
+aliases:
+  cc: claude-code
+  gemini: gemini-cli
+```
+
+`am start cc` démarre `claude-code`.
+
+### Groupes
+
+```yaml
+groups:
+  dev: [claude-code, aider, codex]
+```
+
+`am start group:dev` démarre tous les agents du groupe en arrière-plan.
+
+### Profils d'environnement
+
+```yaml
+profiles:
+  dev:
+    agent: claude-code
+    env: { API_ENV: dev }
+    args: [--verbose]
+```
+
+`am start --profile dev` lance `claude-code` avec les variables et arguments du profil.
+
+### Projets
+
+```yaml
+projects:
+  mon-projet:
+    root: ~/projets/mon-projet
+    default_agent: claude-code
+```
+
+Dans le répertoire du projet, `am start` sans argument lance l'agent par défaut du projet.
+
+### Secrets
+
+Les secrets sont stockés dans le trousseau du système d'exploitation (via `keyring`), jamais en clair dans la config.
+
+```bash
+am secret set OPENAI_API_KEY --agent claude-code --value sk-...
+am start claude-code --env OPENAI_API_KEY=@secret
+```
+
+### Hooks
+
+Commandes exécutées automatiquement aux étapes clés du cycle de vie :
+
+- `on_install`
+- `on_start`
+- `on_stop`
+- `on_update`
+
+Définissables globalement dans `settings.hooks` ou par projet.
+
+### Shell interactif (REPL)
+
+Lancé par `am` sans sous-commande :
+
+- Complétion Tab personnalisée (commandes, agents, alias, groupes, flags, shells, thèmes)
+- Historique des commandes
+- Passerelle système : commandes inconnues exécutées dans le shell actif
+- Commandes internes : `ls`, `dir`, `cd`, `ps`, `where`, `get`, `shell`, `theme`, `exit`, `/help`
+- Bannière ASCII art
+
+---
+
+## 📊 Dashboard TUI
+
+```mermaid
+flowchart LR
+    DASH["am dashboard"] --> OVER["Overview"]
+    DASH --> ACT["Activité"]
+    DASH --> STATS["Statistiques"]
+    DASH --> SESS["Sessions"]
+    DASH --> PROJ["Projets"]
+```
+
+- Navigation : `Tab` / `←` / `→` pour les onglets
+- Défilement : `j` / `k` ou flèches
+- Quitter : `q`
+- Données agrégées depuis `state.json`, le journal d'événements, les sessions et les projets
+
+---
+
+## 🧪 Tests
+
+### Organisation
+
+- **Tests unitaires** : dans chaque module `src/*.rs` sous `#[cfg(test)]`
+- **Tests d'intégration** : dans `tests/`
+
+### Fichiers de tests notables
+
+| Fichier | Couverture |
+|---------|------------|
+| `annotations_test.rs` | Favoris, notes, tags |
+| `config_test.rs` | Chargement/validation/fusion |
+| `dashboard_test.rs` | Dashboard |
+| `doctor_test.rs` | `am doctor` |
+| `dry_run_test.rs` | Mode `--dry-run` |
+| `events_test.rs` | Journal d'événements |
+| `history_test.rs` | Historique |
+| `process_test.rs` | Processus |
+| `profiles_test.rs` | Profils |
+| `projects_test.rs` | Projets |
+| `sessions_test.rs` | Sessions |
+| `stats_test.rs` | Statistiques |
+
+Lancer les tests :
+
+```bash
+cargo test
+```
+
+---
+
+## 📦 Packaging et distribution
+
+```
+dist/                    Binaires précompilés
+├── am-linux-x86_64
+├── am-linux-aarch64
+├── am-windows-x86_64.zip
+├── am_0.4.2_amd64.deb
+└── ...
+
+packaging/              Scripts de packaging
+├── deb/
+├── rpm/
+├── homebrew/
+├── scoop/
+└── winget/
+
+completions/            Scripts de complétion
+├── _am                 zsh
+├── _am.ps1             PowerShell
+├── am.bash             bash
+├── am.elv              elvish
+└── am.fish             fish
+
+man/                    Pages de manuel générées
+```
+
+- `build.rs` enregistre le commit et la branche git pour `am version`
+- `scripts/build-release.ps1` construit les releases multiplateformes
+- `scripts/render-manifests.ps1` génère les manifests de packaging
+
+---
+
+## 🗂️️ Arborescence des données utilisateur
+
+### Windows
+
+```
+%LOCALAPPDATA%\agent-manager\
+├── agents\              installations
+├── logs\                logs agents
+└── state\               state.json, events-*.jsonl, probe-cache.json
+```
+
+### Linux
+
+```
+~/.local/share/agent-manager/   données
+~/.local/state/agent-manager/   logs, state, events, cache
+~/.config/agent-manager/        config.yaml
+```
+
+### macOS
+
+```
+~/Library/Application Support/agent-manager/   données
+~/.local/state/agent-manager/                  logs, state, events, cache
+~/.config/agent-manager/                       config.yaml
+```
+
+Variables d'environnement de débogage/test :
+
+- `AGENT_MANAGER_DATA` : remplace le répertoire de données
+- `AGENT_MANAGER_STATE` : remplace le répertoire d'état
+
+---
+
+## 🔐 Sécurité
+
+- Mode `--dry-run` universel pour simuler sans modifier
+- Checksums `sha256` pour les binaires téléchargés
+- Confirmation avant exécution des scripts d'installation
+- Secrets dans le trousseau OS, jamais dans les logs ni le journal
+- Installation isolée : aucune modification système
+
+---
+
+## 🔁 Résumé du flux de données
+
+```mermaid
+flowchart LR
+    CONFIG["📄 YAML config"] --> CATALOG["📚 Catalog"]
+    CATALOG --> INSTALL["📦 Installateurs"]
+    INSTALL --> STATE["💾 state.json"]
+    STATE --> PROCESS["⚙️ Processus"]
+    PROCESS --> EVENTS["📝 Journal JSONL"]
+    EVENTS --> STATS["📊 Stats / Dashboard"]
+    EVENTS --> SESSIONS["📅 Sessions"]
+    EVENTS --> PROJECTS["🗂️️ Projets"]
+```
+
+---
+
+## 📚 Références
+
+- `src/lib.rs:4` : documentation d'architecture du crate
+- `src/cli.rs:24` : options globales
+- `src/cli.rs:61` : énumération des commandes
+- `src/app.rs:16` : struct `App`
+- `src/config.rs:25` : struct `Config`
+- `src/config.rs:148` : struct `AgentDef`
+- `src/config.rs:241` : enum `InstallType`
+- `src/state.rs:12` : struct `StateFile`
+- `src/events.rs:57` : struct `Event`
+- `README.md` : documentation utilisateur complète
+
+---
+
+*Document généré pour agent-manager v0.4.2* 🚀
diff --git a/Cargo.lock b/Cargo.lock
index c7b967d..9ccfe6b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -21,7 +21,7 @@ dependencies = [
 
 [[package]]
 name = "agent-manager"
-version = "0.4.1"
+version = "0.4.2"
 dependencies = [
  "anyhow",
  "chrono",
@@ -32,8 +32,9 @@ dependencies = [
  "crossterm",
  "flate2",
  "keyring",
+ "nu-ansi-term",
  "ratatui",
- "rustyline",
+ "reedline",
  "semver",
  "serde",
  "serde_json",
@@ -191,6 +192,9 @@ name = "bitflags"
 version = "2.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b588b76d00fde79687d7646a9b5bdf3cc0f655e0bbd080335a95d7e96f3587da"
+dependencies = [
+ "serde_core",
+]
 
 [[package]]
 name = "block-buffer"
@@ -272,12 +276,6 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
-[[package]]
-name = "cfg_aliases"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd16c4719339c4530435d38e511904438d07cce7950afa3718a84ac36c10e89e"
-
 [[package]]
 name = "cfg_aliases"
 version = "0.2.2"
@@ -368,15 +366,6 @@ dependencies = [
  "roff",
 ]
 
-[[package]]
-name = "clipboard-win"
-version = "5.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bde03770d3df201d4fb868f2c9c59e66a3e4e2bd06692a0fe701e7103c7e84d4"
-dependencies = [
- "error-code",
-]
-
 [[package]]
 name = "colorchoice"
 version = "1.0.5"
@@ -471,6 +460,7 @@ dependencies = [
  "mio",
  "parking_lot",
  "rustix",
+ "serde",
  "signal-hook",
  "signal-hook-mio",
  "winapi",
@@ -632,12 +622,6 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
-[[package]]
-name = "error-code"
-version = "3.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b5343afd4a8365a643ac588dab4cf234a190c7f6c88c9f6dd6ffe00837661b7"
-
 [[package]]
 name = "euclid"
 version = "0.22.14"
@@ -1036,6 +1020,15 @@ version = "1.70.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a6cb138bb79a146c1bd460005623e142ef0181e3d0219cb493e02f7d08a35695"
 
+[[package]]
+name = "itertools"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "413ee7dfc52ee1a4949ceeb7dbc8a33f2d6c088194d9f922fb8318faf1f01186"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itertools"
 version = "0.14.0"
@@ -1174,7 +1167,7 @@ version = "1.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c0aeb26bf5e836cc1c341c8106051b573f1766dfa05aa87f0b98be5e51b02303"
 dependencies = [
- "nix 0.29.0",
+ "nix",
  "winapi",
 ]
 
@@ -1227,18 +1220,6 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
-[[package]]
-name = "nix"
-version = "0.28.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab2156c4fce2f8df6c499cc1c763e4394b7482525bf2a9701c9d79d215f519e4"
-dependencies = [
- "bitflags 2.13.1",
- "cfg-if",
- "cfg_aliases 0.1.1",
- "libc",
-]
-
 [[package]]
 name = "nix"
 version = "0.29.0"
@@ -1247,7 +1228,7 @@ checksum = "71e2746dc3a24dd78b3cfcb7be93368c6de9963d30f43a6a73998a9cf4b17b46"
 dependencies = [
  "bitflags 2.13.1",
  "cfg-if",
- "cfg_aliases 0.2.2",
+ "cfg_aliases",
  "libc",
  "memoffset",
 ]
@@ -1262,6 +1243,15 @@ dependencies = [
  "minimal-lexical",
 ]
 
+[[package]]
+name = "nu-ansi-term"
+version = "0.50.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5"
+dependencies = [
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "num-conv"
 version = "0.2.2"
@@ -1601,16 +1591,16 @@ dependencies = [
  "compact_str",
  "critical-section",
  "hashbrown 0.17.1",
- "itertools",
+ "itertools 0.14.0",
  "kasuari",
  "lru",
  "palette",
  "serde",
- "strum",
+ "strum 0.28.0",
  "thiserror 2.0.20",
  "unicode-segmentation",
  "unicode-truncate",
- "unicode-width 0.2.2",
+ "unicode-width",
 ]
 
 [[package]]
@@ -1666,14 +1656,14 @@ dependencies = [
  "hashbrown 0.17.1",
  "indoc",
  "instability",
- "itertools",
+ "itertools 0.14.0",
  "line-clipping",
  "ratatui-core",
  "serde",
- "strum",
+ "strum 0.28.0",
  "time",
  "unicode-segmentation",
- "unicode-width 0.2.2",
+ "unicode-width",
 ]
 
 [[package]]
@@ -1685,6 +1675,26 @@ dependencies = [
  "bitflags 2.13.1",
 ]
 
+[[package]]
+name = "reedline"
+version = "0.49.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "826c1fc22a2b1f14c3f6a80fc3d56adfbfb913d07f170bce4246700de7adfd50"
+dependencies = [
+ "chrono",
+ "crossterm",
+ "fd-lock",
+ "itertools 0.13.0",
+ "nu-ansi-term",
+ "serde",
+ "strip-ansi-escapes",
+ "strum 0.27.2",
+ "thiserror 2.0.20",
+ "unicase",
+ "unicode-segmentation",
+ "unicode-width",
+]
+
 [[package]]
 name = "regex"
 version = "1.13.1"
@@ -1797,26 +1807,6 @@ version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf54715a573b99ac80df0bc206da022bcd442c974952c7b9720069370852e21f"
 
-[[package]]
-name = "rustyline"
-version = "14.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7803e8936da37efd9b6d4478277f4b2b9bb5cdb37a113e8d63222e58da647e63"
-dependencies = [
- "bitflags 2.13.1",
- "cfg-if",
- "clipboard-win",
- "fd-lock",
- "libc",
- "log",
- "memchr",
- "nix 0.28.0",
- "unicode-segmentation",
- "unicode-width 0.1.14",
- "utf8parse",
- "windows-sys 0.52.0",
-]
-
 [[package]]
 name = "ryu"
 version = "1.0.23"
@@ -1992,19 +1982,49 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
+[[package]]
+name = "strip-ansi-escapes"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a8f8038e7e7969abb3f1b7c2a811225e9296da208539e0f79c5251d6cac0025"
+dependencies = [
+ "vte",
+]
+
 [[package]]
 name = "strsim"
 version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
+[[package]]
+name = "strum"
+version = "0.27.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "af23d6f6c1a224baef9d3f61e287d2761385a5b88fdab4eb4c6f11aeb54c4bcf"
+dependencies = [
+ "strum_macros 0.27.2",
+]
+
 [[package]]
 name = "strum"
 version = "0.28.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9628de9b8791db39ceda2b119bbe13134770b56c138ec1d3af810d045c04f9bd"
 dependencies = [
- "strum_macros",
+ "strum_macros 0.28.0",
+]
+
+[[package]]
+name = "strum_macros"
+version = "0.27.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7695ce3845ea4b33927c055a39dc438a45b059f7c1b3d91d38d10355fb8cbca7"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -2155,7 +2175,7 @@ dependencies = [
  "libc",
  "log",
  "memmem",
- "nix 0.29.0",
+ "nix",
  "num-derive",
  "num-traits",
  "ordered-float",
@@ -2262,6 +2282,12 @@ version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2896d95c02a80c6d6a5d6e953d479f5ddf2dfdb6a244441010e373ac0fb88971"
 
+[[package]]
+name = "unicase"
+version = "2.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dbc4bc3a9f746d862c45cb89d705aa10f187bb96c76001afab07a0d35ce60142"
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.24"
@@ -2280,17 +2306,11 @@ version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "16b380a1238663e5f8a691f9039c73e1cdae598a30e9855f541d29b08b53e9a5"
 dependencies = [
- "itertools",
+ "itertools 0.14.0",
  "unicode-segmentation",
- "unicode-width 0.2.2",
+ "unicode-width",
 ]
 
-[[package]]
-name = "unicode-width"
-version = "0.1.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"
-
 [[package]]
 name = "unicode-width"
 version = "0.2.2"
@@ -2366,6 +2386,15 @@ version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
+[[package]]
+name = "vte"
+version = "0.14.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "231fdcd7ef3037e8330d8e17e61011a2c244126acc0a982f4040ac3f9f0bc077"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "vtparse"
 version = "0.6.2"
diff --git a/Cargo.toml b/Cargo.toml
index 91f5b58..b58dfc4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "agent-manager"
-version = "0.4.1"
+version = "0.4.2"
 edition = "2021"
 description = "Manage local AI coding agents: list, install, start, stop, update — with automatic dependency handling and a YAML-driven catalog."
 license = "MIT"
@@ -25,7 +25,8 @@ semver = "1"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 serde_yaml = "0.9"
-rustyline = { version = "14", default-features = false, features = ["with-file-history"] }
+reedline = "0.49"
+nu-ansi-term = "0.50"
 sha2 = "0.10"
 shell-words = "1"
 tar = "0.4"
diff --git a/README.md b/README.md
index 8faf063..99e4830 100644
--- a/README.md
+++ b/README.md
@@ -227,16 +227,21 @@ PATH — pwsh, powershell, cmd, bash, zsh, fish, sh, nu, elvish).
     ❯ ls | where size > 1mb   # filtre la dernière table  (>, <, >=, <=, ==, !=, =~)
     ❯ ps | where name =~ am   # =~ cherche dans le texte
     ❯ ls | get name           # sélectionne une colonne
-    ❯ cd <Tab>                # complétion des dossiers uniquement, un niveau par Tab
+    ❯ cd <Tab>                # complétion des dossiers — menu interactif façon Nushell
     ❯ shell                   # affiche le shell courant + les shells disponibles
     ❯ shell bash              # change le shell de la session
     ❯ !ls · !list             # force l'exécution système (même nom qu'une commande am)
     ❯ cd ~/projets            # change le répertoire de la session (persistant)
     ❯ /help                   # commandes slash : /help · /version · /exit · /shell <nom>
 
-Le menu Tab affiche une **description** à côté de chaque candidat
-(commandes et agents), comme Nushell, et **cycle** entre les propositions à
-chaque Tab.
+La complétion Tab est un **menu interactif façon Nushell** : une
+correspondance unique est insérée directement ; plusieurs correspondances
+ouvrent un menu sous la ligne avec le **premier choix en surbrillance**, et
+chaque Tab déplace la surbrillance vers le choix suivant (Shift+Tab vers
+l'arrière). **Entrée** valide le choix, **Échap** ferme le menu, les flèches
+↑/↓ naviguent et continuer à taper filtre la liste en direct. Le menu
+affiche une **description** à côté de chaque candidat (commandes et agents)
+et suit la palette du thème actif.
 
 Pour rendre le choix permanent : `settings.default_shell: pwsh` dans
 `config.yaml` (voir `am config path`).
diff --git a/RELEASING.md b/RELEASING.md
index 7e142f9..b9666e4 100644
--- a/RELEASING.md
+++ b/RELEASING.md
@@ -56,7 +56,7 @@ doit signaler aucune dépendance manquante.
 
 Une fois toutes les archives dans `dist/` :
 
-    scripts/render-manifests.ps1 -Version 0.4.1
+    scripts/render-manifests.ps1 -Version 0.4.2
 
 Ce script rend, avec la version et les sha256 réels :
 
@@ -67,16 +67,16 @@ Ce script rend, avec la version et les sha256 réels :
 - `dist/homebrew/am.rb`         → à servir via un tap, ou à soumettre
 - `dist/rpm/am.spec`            → rpmbuild -bb (avec am-linux-x86_64.tar.gz
   dans ~/rpmbuild/SOURCES)
-- Paquet deb : `packaging/deb/make-deb.sh 0.4.1` → dist/am_0.4.1_amd64.deb
+- Paquet deb : `packaging/deb/make-deb.sh 0.4.2` → dist/am_0.4.2_amd64.deb
 
 ## 4. Créer la release sur Gitea
 
-Via l'interface web : Releases > New Release, tag v0.4.1, attacher les
+Via l'interface web : Releases > New Release, tag v0.4.2, attacher les
 archives. Ou via l'API (jeton Gitea requis) :
 
     curl -X POST -H "Authorization: token <JETON>" \
       -H "Content-Type: application/json" \
-      -d '{"tag_name":"v0.4.1","name":"v0.4.1","body":"notes de version"}' \
+      -d '{"tag_name":"v0.4.2","name":"v0.4.2","body":"notes de version"}' \
       https://git.dracodev.net/api/v1/repos/Projets/agent-manager/releases
 
     curl -X POST -H "Authorization: token <JETON>" \
@@ -89,7 +89,7 @@ archives. Ou via l'API (jeton Gitea requis) :
 
 ## 5. Tag git (déclenche aussi le pipeline CI)
 
-    git tag v0.4.1 && git push origin v0.4.1
+    git tag v0.4.2 && git push origin v0.4.2
 
 ## Conventions de nommage (attendues par les installateurs et self-update)
 
diff --git a/man/am-self-update.1 b/man/am-self-update.1
index 249e983..2967658 100644
--- a/man/am-self-update.1
+++ b/man/am-self-update.1
@@ -2,11 +2,11 @@
 .el .ds Aq '
 .TH am-self-update 1  "self-update " 
 .SH NAME
-self\-update \- Update agent\-manager itself from GitHub Releases
+self\-update \- Update agent\-manager itself from the latest release
 .SH SYNOPSIS
 \fBself\-update\fR [\fB\-\-check\fR] [\fB\-\-to\fR] [\fB\-h\fR|\fB\-\-help\fR] 
 .SH DESCRIPTION
-Update agent\-manager itself from GitHub Releases
+Update agent\-manager itself from the latest release
 .SH OPTIONS
 .TP
 \fB\-\-check\fR
diff --git a/man/am.1 b/man/am.1
index 77a3a03..6c9c665 100644
--- a/man/am.1
+++ b/man/am.1
@@ -1,6 +1,6 @@
 .ie \n(.g .ds Aq \(aq
 .el .ds Aq '
-.TH am 1  "am 0.4.1" 
+.TH am 1  "am 0.4.2" 
 .SH NAME
 am \- agent\-manager (am) — manage local AI coding agents
 .SH SYNOPSIS
@@ -163,7 +163,7 @@ am\-completion(1)
 Generate a shell completion script
 .TP
 am\-self\-update(1)
-Update agent\-manager itself from GitHub Releases
+Update agent\-manager itself from the latest release
 .TP
 am\-self\-uninstall(1)
 Remove agent\-manager and everything it created from this machine
@@ -174,4 +174,4 @@ Export the configuration and installation state (backup)
 am\-import(1)
 Import a previously exported configuration and state
 .SH VERSION
-v0.4.1
+v0.4.2
diff --git a/scripts/render-manifests.ps1 b/scripts/render-manifests.ps1
index 1ad9334..6c3bc9f 100644
--- a/scripts/render-manifests.ps1
+++ b/scripts/render-manifests.ps1
@@ -1,6 +1,6 @@
 # Renders the packaging templates (scoop, winget, homebrew, rpm) with the
 # version and the sha256 of every release archive.
-# Usage: scripts/render-manifests.ps1 -Version 0.4.1 [-DistDir dist]
+# Usage: scripts/render-manifests.ps1 -Version 0.4.2 [-DistDir dist]
 param(
     [Parameter(Mandatory = $true)][string]$Version,
     [string]$DistDir = "dist"
diff --git a/src/dashboard.rs b/src/dashboard.rs
index 961162c..9cafb1b 100644
--- a/src/dashboard.rs
+++ b/src/dashboard.rs
@@ -223,6 +223,9 @@ mod tests {
         p.probe_cache_file = dir.join("probe-cache.json");
         p.config_dir = Some(dir.join("config"));
         app.paths = p;
+        // The state store keeps the path it was created with: repoint it at
+        // the sandbox too, or the test reads the developer's real state.
+        app.state = crate::state::StateStore::new(dir.join("state.json"));
         app
     }
 
diff --git a/src/output.rs b/src/output.rs
index 5f514ff..6bcd695 100644
--- a/src/output.rs
+++ b/src/output.rs
@@ -235,61 +235,6 @@ pub fn kv_table(
     out
 }
 
-/// Build the lines of the boxed Tab-completion menu from (candidate,
-/// description) rows. Single column when no descriptions exist.
-pub fn completion_box(rows: &[(String, String)]) -> Vec<String> {
-    let has_desc = rows.iter().any(|(_, d)| !d.is_empty());
-    let name_w = rows
-        .iter()
-        .map(|(n, _)| n.chars().count())
-        .max()
-        .unwrap_or(0)
-        .max("name".chars().count());
-    let desc_w = if has_desc {
-        rows.iter()
-            .map(|(_, d)| truncate(d, 40).chars().count())
-            .max()
-            .unwrap_or(0)
-            .max("description".chars().count())
-    } else {
-        0
-    };
-    let border = |left: char, mid: char, right: char| -> String {
-        let mut line = String::new();
-        line.push(left);
-        line.push_str(&"─".repeat(name_w + 2));
-        if has_desc {
-            line.push(mid);
-            line.push_str(&"─".repeat(desc_w + 2));
-        }
-        line.push(right);
-        line
-    };
-    let mut out = Vec::new();
-    out.push(border('╭', '┬', '╮'));
-    if has_desc {
-        out.push(format!(
-            "│ {} │ {} │",
-            pad("name", name_w),
-            pad("description", desc_w)
-        ));
-        out.push(border('├', '┼', '┤'));
-    }
-    for (name, desc) in rows {
-        if has_desc {
-            out.push(format!(
-                "│ {} │ {} │",
-                pad(name, name_w),
-                pad(&truncate(desc, 40), desc_w)
-            ));
-        } else {
-            out.push(format!("│ {} │", pad(name, name_w)));
-        }
-    }
-    out.push(border('╰', '┴', '╯'));
-    out
-}
-
 // ---------------------------------------------------------------------------
 // Tables
 // ---------------------------------------------------------------------------
@@ -457,40 +402,6 @@ fn pad(s: &str, width: usize) -> String {
 mod tests {
     use super::*;
 
-    #[test]
-    fn completion_box_with_descriptions_is_aligned() {
-        let rows = vec![
-            ("list".to_string(), "list installed agents".to_string()),
-            ("status".to_string(), "show agent state".to_string()),
-        ];
-        let lines = completion_box(&rows);
-        assert_eq!(lines.len(), 6); // top, header, sep, 2 rows, bottom
-        assert!(lines[0].starts_with('╭') && lines[0].contains('┬'));
-        assert!(lines[0].ends_with('╮'));
-        assert!(lines[1].contains("name") && lines[1].contains("description"));
-        assert!(lines[2].starts_with('├'));
-        assert!(lines[5].starts_with('╰'));
-        let widths: Vec<usize> = lines.iter().map(|l| l.chars().count()).collect();
-        assert!(
-            widths.iter().all(|w| *w == widths[0]),
-            "unaligned: {lines:?}"
-        );
-        assert!(lines[3].contains("list") && lines[3].contains("list installed agents"));
-    }
-
-    #[test]
-    fn completion_box_without_descriptions_is_single_column() {
-        let rows = vec![
-            ("src".to_string(), "".to_string()),
-            ("am.exe".to_string(), "".to_string()),
-        ];
-        let lines = completion_box(&rows);
-        assert_eq!(lines.len(), 4); // top, 2 rows, bottom
-        assert!(!lines.iter().any(|l| l.contains("description")));
-        let widths: Vec<usize> = lines.iter().map(|l| l.chars().count()).collect();
-        assert!(widths.iter().all(|w| *w == widths[0]));
-    }
-
     #[test]
     fn kv_table_is_aligned_with_and_without_colors() {
         let rows = vec![
diff --git a/src/repl.rs b/src/repl.rs
index 2db525a..5b8e73e 100644
--- a/src/repl.rs
+++ b/src/repl.rs
@@ -7,10 +7,13 @@
 //! pass-through to pwsh, cmd, bash, zsh, ... The user's default shell is
 //! detected at startup and highlighted in the banner and the status line.
 //!
-//! Uses rustyline for line editing: Tab completion (commands, agents, aliases,
-//! groups, flags, shell names), command history persisted in the state
-//! directory, and graceful fallback to plain line input when no terminal is
-//! available.
+//! Uses reedline (Nushell's line editor) for editing: Nushell-style Tab
+//! completion — a single match is inserted immediately, several matches open
+//! an interactive menu under the prompt with the first choice highlighted;
+//! further Tabs move the highlight to the next choice (Enter validates, Esc
+//! closes, arrows navigate, typing filters live). Command history is persisted
+//! in the state directory, and there is a graceful fallback to plain line
+//! input when no terminal is available.
 
 use crate::app::App;
 use crate::cli::{Command, StartArgs};
@@ -23,12 +26,13 @@ use crate::shell::ShellSession;
 use crate::theme::Theme;
 use anyhow::{anyhow, Result};
 use colored::Colorize;
-use rustyline::completion::{Completer, Pair};
-use rustyline::error::ReadlineError;
-use rustyline::highlight::Highlighter;
-use rustyline::hint::Hinter;
-use rustyline::validate::Validator;
-use rustyline::{Context, Helper};
+use nu_ansi_term::{Color, Style};
+use reedline::{
+    default_emacs_keybindings, ColumnarMenu, Completer, Emacs, FileBackedHistory, KeyCode,
+    KeyModifiers, MenuBuilder, MenuTextStyle, Prompt, PromptEditMode, PromptHistorySearch,
+    Reedline, ReedlineEvent, ReedlineMenu, Signal, Span, Suggestion,
+};
+use std::borrow::Cow;
 use std::collections::BTreeMap;
 use std::io::{IsTerminal, Write};
 use std::path::PathBuf;
@@ -55,9 +59,6 @@ pub struct AmCompleter {
     /// Short descriptions shown next to candidates in the Tab menu
     /// (Nushell-style).
     descriptions: BTreeMap<String, String>,
-    /// Active color theme (used by the boxed menu highlight; follows the
-    /// app theme when it is switched with the REPL 'theme <name>' command).
-    theme: std::cell::Cell<&'static crate::theme::Theme>,
 }
 
 /// One-line descriptions for the Tab completion menu.
@@ -142,15 +143,9 @@ impl AmCompleter {
         }
         completer.agents.sort();
         completer.agents.dedup();
-        completer.theme.set(app.theme());
         completer
     }
 
-    /// Point the menu at a new theme (after 'theme <name>' in the REPL).
-    pub fn set_theme(&self, theme: &'static crate::theme::Theme) {
-        self.theme.set(theme);
-    }
-
     pub fn from_catalog(
         catalog: &crate::catalog::Catalog,
         aliases: &BTreeMap<String, String>,
@@ -192,7 +187,6 @@ impl AmCompleter {
             descriptions.insert(a.name.clone(), truncate_desc(&desc));
         }
         Self {
-            theme: std::cell::Cell::new(crate::theme::default_theme()),
             commands: vec![
                 "list", "status", "sessions", "stats", "top", "report", "projects", "timeline", "log", "logs", "history", "init", "alias", "secret", "open", "watch", "search", "info", "install", "uninstall", "update",
                 "start", "stop", "restart", "run", "doctor", "config", "completion",
@@ -329,147 +323,186 @@ impl AmCompleter {
 }
 
 impl Completer for AmCompleter {
-    type Candidate = Pair;
-
-    fn complete(
-        &self,
-        line: &str,
-        pos: usize,
-        _ctx: &Context<'_>,
-    ) -> rustyline::Result<(usize, Vec<Pair>)> {
+    fn complete(&mut self, line: &str, pos: usize) -> Vec<Suggestion> {
         let (start, cands) = self.candidates_for(line, pos);
-        let pairs = if cands.len() < 2 {
-            // A single match is inserted immediately (no menu).
-            cands
-                .into_iter()
-                .map(|c| Pair {
-                    display: c.clone(),
-                    replacement: c,
-                })
-                .collect()
-        } else {
-            self.boxed_pairs(&cands)
-        };
-        Ok((start, pairs))
-    }
-}
-
-impl AmCompleter {
-    /// Build the boxed Tab menu: one candidate per box line, so rustyline's
-    /// single-column layout renders the whole menu as one white-framed
-    /// table. Decorative lines (borders, header) replace the typed word
-    /// with the common prefix, so completion behaves exactly as before.
-    fn boxed_pairs(&self, cands: &[String]) -> Vec<Pair> {
-        let rows: Vec<(String, String)> = cands
-            .iter()
-            .map(|c| (c.clone(), self.descriptions.get(c).cloned().unwrap_or_default()))
-            .collect();
-        let has_desc = rows.iter().any(|(_, d)| !d.is_empty());
-        let lines = crate::output::completion_box(&rows);
-        let lcp = common_prefix(cands);
-        let n = cands.len();
-        let data_start = if has_desc { 3 } else { 1 };
-        // Pad every line to the terminal width: rustyline then lays the
-        // menu out in one column, one box line per row.
-        let width = crate::output::terminal_width()
-            .unwrap_or(120)
-            .max(lines.iter().map(|l| l.chars().count()).max().unwrap_or(0));
-        lines
+        cands
             .into_iter()
-            .enumerate()
-            .map(|(i, line)| {
-                let replacement = if i >= data_start && i < data_start + n {
-                    cands[i - data_start].clone()
-                } else {
-                    lcp.clone()
-                };
-                let display = format!(
-                    "{line}{}",
-                    " ".repeat(width.saturating_sub(line.chars().count()))
-                );
-                Pair {
-                    display,
-                    replacement,
-                }
+            .map(|c| Suggestion {
+                value: c.clone(),
+                description: self.descriptions.get(&c).cloned(),
+                span: Span::new(start, pos),
+                ..Default::default()
             })
             .collect()
     }
 }
 
-/// Longest common prefix of the candidates (chars, not bytes).
-fn common_prefix(items: &[String]) -> String {
-    let mut iter = items.iter();
-    let Some(first) = iter.next() else {
-        return String::new();
-    };
-    let mut prefix = first.clone();
-    for s in iter {
-        while !s.starts_with(&prefix) && !prefix.is_empty() {
-            prefix.pop();
-        }
-        if prefix.is_empty() {
-            break;
-        }
+// ---------------------------------------------------------------------------
+// Line editor (reedline) and Nushell-style completion menu
+// ---------------------------------------------------------------------------
+
+/// The REPL prompt, unchanged from the rustyline era. While a completion
+/// menu is open, reedline replaces the (empty) indicator with the menu
+/// marker "| ", like Nushell.
+struct AmPrompt;
+
+impl Prompt for AmPrompt {
+    fn render_prompt_left(&self) -> Cow<'_, str> {
+        Cow::Borrowed("❯ ")
     }
-    prefix
-}
 
-impl Hinter for AmCompleter {
-    type Hint = String;
-
-    fn hint(&self, _line: &str, _pos: usize, _ctx: &Context<'_>) -> Option<String> {
-        None
+    fn render_prompt_right(&self) -> Cow<'_, str> {
+        Cow::Borrowed("")
     }
-}
 
-impl Highlighter for AmCompleter {
-    /// Style the boxed completion menu: borders dim, the header row in the
-    /// theme header style, candidate names in the accent color.
-    fn highlight_candidate<'c>(
+    fn render_prompt_indicator(&self, _mode: PromptEditMode) -> Cow<'_, str> {
+        Cow::Borrowed("")
+    }
+
+    fn render_prompt_multiline_indicator(&self) -> Cow<'_, str> {
+        Cow::Borrowed("  ")
+    }
+
+    fn render_prompt_history_search_indicator(
         &self,
-        candidate: &'c str,
-        completion: rustyline::CompletionType,
-    ) -> std::borrow::Cow<'c, str> {
-        use std::borrow::Cow;
-        let _ = completion;
-        match candidate.chars().next() {
-            Some('╭') | Some('╰') | Some('├') => Cow::Owned(self.theme.get().frame(candidate)),
-            Some('│') => {
-                let cells: Vec<&str> = candidate.split('│').collect();
-                if cells.len() >= 4 {
-                    if cells[1].trim() == "name" && cells[2].trim() == "description" {
-                        Cow::Owned(self.theme.get().hdr(candidate))
-                    } else {
-                        let bar = self.theme.get().frame("│");
-                        Cow::Owned(format!(
-                            "{}{}{}{}{}",
-                            bar,
-                            self.theme.get().acc(cells[1]),
-                            bar,
-                            cells[2],
-                            bar
-                        ))
-                    }
-                } else if cells.len() == 3 {
-                    // Single-column menu (no descriptions, e.g. the theme
-                    // names): paint the bars and the name.
-                    let bar = self.theme.get().frame("│");
-                    Cow::Owned(format!(
-                        "{}{}{}",
-                        bar,
-                        self.theme.get().acc(cells[1]),
-                        bar
-                    ))
-                } else {
-                    Cow::Borrowed(candidate)
+        _search: PromptHistorySearch,
+    ) -> Cow<'_, str> {
+        Cow::Borrowed("(reverse-i-search)'")
+    }
+}
+
+/// Map an ANSI basic color code (30-37, 90-97) onto the nu-ansi-term
+/// named palette.
+fn basic_color(n: u8) -> Option<Color> {
+    match n {
+        30 => Some(Color::Black),
+        31 => Some(Color::Red),
+        32 => Some(Color::Green),
+        33 => Some(Color::Yellow),
+        34 => Some(Color::Blue),
+        35 => Some(Color::Purple),
+        36 => Some(Color::Cyan),
+        37 => Some(Color::White),
+        90 => Some(Color::DarkGray),
+        91 => Some(Color::LightRed),
+        92 => Some(Color::LightGreen),
+        93 => Some(Color::LightYellow),
+        94 => Some(Color::LightBlue),
+        95 => Some(Color::LightPurple),
+        96 => Some(Color::LightCyan),
+        97 => Some(Color::LightGray),
+        _ => None,
+    }
+}
+
+/// Map one theme SGR string ("1;38;5;81") onto a nu-ansi-term Style so the
+/// completion menu can follow the active theme. Unknown parameters are
+/// ignored; the empty string (mono theme) yields the default style.
+fn sgr_to_style(sgr: &str) -> Style {
+    let toks: Vec<&str> = sgr.split(';').collect();
+    let mut style = Style::default();
+    let mut i = 0;
+    while i < toks.len() {
+        match toks[i] {
+            "1" => style = style.bold(),
+            "2" => style = style.dimmed(),
+            "3" => style = style.italic(),
+            "4" => style = style.underline(),
+            "7" => style = style.reverse(),
+            "38" if toks.get(i + 1) == Some(&"5") => {
+                if let Some(n) = toks.get(i + 2).and_then(|t| t.parse::<u8>().ok()) {
+                    style = style.fg(Color::Fixed(n));
+                }
+                i += 2;
+            }
+            "39" => style = style.fg(Color::Default),
+            other => {
+                if let Some(c) = other.parse::<u8>().ok().and_then(basic_color) {
+                    style = style.fg(c);
                 }
             }
-            _ => Cow::Borrowed(candidate),
         }
+        i += 1;
+    }
+    style
+}
+
+/// Completion menu colors derived from the active theme: the highlighted
+/// choice is the theme accent in reverse video (like Nushell's default),
+/// the other choices are dimmed and the descriptions use the info color.
+/// With the mono theme the accent is plain, so only the reverse-video
+/// highlight remains.
+fn menu_text_style(theme: &crate::theme::Theme, color: bool) -> MenuTextStyle {
+    let accent = if color {
+        sgr_to_style(theme.accent)
+    } else {
+        Style::default()
+    };
+    MenuTextStyle {
+        selected_text_style: accent.reverse(),
+        text_style: if color {
+            sgr_to_style(theme.dim)
+        } else {
+            Style::default()
+        },
+        description_style: if color {
+            sgr_to_style(theme.info)
+        } else {
+            Style::default()
+        },
+        selected_match_style: accent.reverse().underline(),
+        match_style: Style::default().underline(),
     }
 }
-impl Validator for AmCompleter {}
-impl Helper for AmCompleter {}
+
+/// Build the reedline line editor:
+///
+/// * Nushell-style Tab: the first press opens the completion menu with the
+///   first choice highlighted; every further press moves the highlight to
+///   the next choice (Enter validates, Esc closes, the arrow keys navigate
+///   and typing filters the list live). Shift+Tab moves backwards.
+/// * Quick completions: a single match is inserted immediately, without
+///   opening the menu.
+/// * Command history persisted in the state directory (history.txt).
+/// * The completion menu styled with the active theme (the REPL 'theme
+///   <name>' command rebuilds the editor so the menu follows).
+fn build_line_editor(app: &App, history_path: &std::path::Path) -> Result<Reedline> {
+    let mut keybindings = default_emacs_keybindings();
+    keybindings.add_binding(
+        KeyModifiers::NONE,
+        KeyCode::Tab,
+        ReedlineEvent::UntilFound(vec![
+            ReedlineEvent::Menu("completion_menu".to_string()),
+            ReedlineEvent::MenuNext,
+        ]),
+    );
+    keybindings.add_binding(
+        KeyModifiers::SHIFT,
+        KeyCode::BackTab,
+        ReedlineEvent::UntilFound(vec![
+            ReedlineEvent::Menu("completion_menu".to_string()),
+            ReedlineEvent::MenuPrevious,
+        ]),
+    );
+    let history = FileBackedHistory::with_file(1000, history_path.to_path_buf())
+        .map_err(|e| anyhow!("cannot open the command history: {e}"))?;
+    let color = app.color();
+    let ts = menu_text_style(app.theme(), color);
+    let menu = ColumnarMenu::default()
+        .with_name("completion_menu")
+        .with_text_style(ts.text_style)
+        .with_selected_text_style(ts.selected_text_style)
+        .with_description_text_style(ts.description_style)
+        .with_selected_match_text_style(ts.selected_match_style)
+        .with_match_text_style(ts.match_style);
+    Ok(Reedline::create()
+        .with_completer(Box::new(AmCompleter::new(app)))
+        .with_quick_completions(true)
+        .with_history(Box::new(history))
+        .with_menu(ReedlineMenu::EngineCompleter(Box::new(menu)))
+        .with_edit_mode(Box::new(Emacs::new(keybindings)))
+        .with_ansi_colors(color))
+}
 
 // ---------------------------------------------------------------------------
 // Banner (Hermes-style)
@@ -998,54 +1031,71 @@ pub fn run(app: &App) -> Result<i32> {
 }
 
 fn run_with_editor(app: &App, session: &mut ShellSession, sid: &str) -> Result<i32> {
-    let mut rl: rustyline::Editor<AmCompleter, rustyline::history::FileHistory> =
-        rustyline::Editor::new()?;
-    rl.set_helper(Some(AmCompleter::new(app)));
-    // Nushell-style completion: a single match is inserted immediately;
-    // otherwise Tab inserts the longest common prefix and the menu lists the
-    // candidates with their descriptions.
-    use rustyline::config::{CompletionType, Configurer};
-    let _ = rl.set_completion_type(CompletionType::List);
-    let history_path = app.paths.state_file.with_file_name("history.txt");
-    if rl.load_history(&history_path).is_err() {
-        // First run: no history yet.
+    // With piped stdin (tests, scripts, CI) the line editor cannot read
+    // console keys — reedline would block on the console instead of the
+    // pipe. Fall back to plain line input (run() handles the fallback).
+    if !std::io::stdin().is_terminal() {
+        return Err(anyhow!("stdin is not a terminal"));
     }
+    let history_path = app.paths.state_file.with_file_name("history.txt");
+    let mut rl = build_line_editor(app, &history_path)?;
+    let prompt = AmPrompt;
     let started = Instant::now();
     let mut last: Option<DataTable> = None;
     let mut last_duration: Option<Duration> = None;
+    let mut first_read = true;
+    let mut theme: &'static crate::theme::Theme = app.theme();
     loop {
         print_status(app, started, last_duration);
-        match rl.readline("❯ ") {
-            Ok(line) => {
-                let trimmed = line.trim().to_string();
-                if trimmed.is_empty() {
-                    continue;
-                }
-                let _ = rl.add_history_entry(trimmed.as_str());
-                let t = Instant::now();
-                let result = handle_input(app, session, &mut last, &trimmed);
-                last_duration = Some(t.elapsed());
-                record_history(app, sid, &trimmed, &result, t.elapsed());
-                // 'theme <name>' may have switched the app theme: repoint the
-                // completion menu at the new palette.
-                if let Some(h) = rl.helper_mut() {
-                    h.set_theme(app.theme());
-                }
-                match result {
-                    Ok(true) => break,
-                    Ok(false) => {}
-                    Err(e) => app.log.error(&format!("{e:#}")),
-                }
-            }
-            Err(ReadlineError::Interrupted) => continue,
-            Err(ReadlineError::Eof) => break,
+        let signal = match rl.read_line(&prompt) {
+            Ok(signal) => signal,
             Err(e) => {
+                // No usable terminal (e.g. AM_FORCE_REPL with piped stdin):
+                // fall back to plain line input like before.
+                if first_read {
+                    return Err(anyhow!("line editor unavailable: {e}"));
+                }
                 app.log.warn(&format!("input error: {e}"));
                 break;
             }
+        };
+        first_read = false;
+        let line = match signal {
+            Signal::Success(line) => line,
+            // Like rustyline: Ctrl-C aborts the current line, Ctrl-D (EOF on
+            // an empty line) ends the session.
+            Signal::CtrlC => continue,
+            Signal::CtrlD => break,
+            Signal::HostCommand(_) | Signal::ExternalBreak(_) => continue,
+            // Signal is non-exhaustive: stay in the REPL for future signals.
+            _ => continue,
+        };
+        let trimmed = line.trim().to_string();
+        if trimmed.is_empty() {
+            continue;
+        }
+        let t = Instant::now();
+        let result = handle_input(app, session, &mut last, &trimmed);
+        last_duration = Some(t.elapsed());
+        record_history(app, sid, &trimmed, &result, t.elapsed());
+        // 'theme <name>' may have switched the app theme: rebuild the editor
+        // so the completion menu follows the new palette (the history is
+        // file-backed and re-read from disk).
+        if !std::ptr::eq(theme, app.theme()) {
+            theme = app.theme();
+            let _ = rl.sync_history();
+            match build_line_editor(app, &history_path) {
+                Ok(new_rl) => rl = new_rl,
+                Err(e) => app.log.warn(&format!("cannot rebuild the editor: {e:#}")),
+            }
+        }
+        match result {
+            Ok(true) => break,
+            Ok(false) => {}
+            Err(e) => app.log.error(&format!("{e:#}")),
         }
     }
-    let _ = rl.save_history(&history_path);
+    let _ = rl.sync_history();
     Ok(0)
 }
 
@@ -1181,7 +1231,10 @@ fn handle_line(
         }
         return Ok(false);
     }
-    let tokens = shell_words::split(line).map_err(|e| anyhow!("cannot parse command: {e}"))?;
+    // Windows: split with backslashes as literal path separators (the Unix
+    // shell_words splitter would strip them from 'cd dev\git\...'). Unix
+    // keeps the classic backslash-escaping semantics.
+    let tokens = split_command(line)?;
     if tokens.is_empty() {
         return Ok(false);
     }
@@ -1620,8 +1673,7 @@ fn eval_pipeline(app: &App, last: &mut Option<DataTable>, line: &str) -> Result<
         .collect();
     let mut table: Option<DataTable> = None;
     for part in &parts {
-        let tokens =
-            shell_words::split(part).map_err(|e| anyhow!("cannot parse command: {e}"))?;
+        let tokens = split_command(part)?;
         if tokens.is_empty() {
             continue;
         }
@@ -1681,6 +1733,52 @@ fn eval_pipeline(app: &App, last: &mut Option<DataTable>, line: &str) -> Result<
     Ok(false)
 }
 
+/// Split a command line into tokens.
+///
+/// On Windows, backslashes are literal path separators: 'cd dev\git\...'
+/// must reach change_dir intact, and double quotes group tokens ("" escapes
+/// a quote), like cmd/PowerShell. The Unix shell_words splitter would eat
+/// every backslash as an escape character, breaking Windows paths.
+/// On Unix, the classic backslash-escaping rules are kept.
+fn split_command(line: &str) -> Result<Vec<String>> {
+    #[cfg(windows)]
+    {
+        let mut tokens: Vec<String> = Vec::new();
+        let mut cur = String::new();
+        let mut chars = line.chars().peekable();
+        let mut in_quotes = false;
+        while let Some(c) = chars.next() {
+            match c {
+                '"' => {
+                    if in_quotes && chars.peek() == Some(&'"') {
+                        chars.next();
+                        cur.push('"');
+                    } else {
+                        in_quotes = !in_quotes;
+                    }
+                }
+                c if c.is_whitespace() && !in_quotes => {
+                    if !cur.is_empty() {
+                        tokens.push(std::mem::take(&mut cur));
+                    }
+                }
+                c => cur.push(c),
+            }
+        }
+        if in_quotes {
+            anyhow::bail!("unterminated quote");
+        }
+        if !cur.is_empty() {
+            tokens.push(cur);
+        }
+        Ok(tokens)
+    }
+    #[cfg(not(windows))]
+    {
+        shell_words::split(line).map_err(|e| anyhow!("cannot parse command: {e}"))
+    }
+}
+
 /// Run one system command through the active shell (inherited stdio).
 fn run_system(app: &App, session: &ShellSession, line: &str) -> Result<()> {
     app.log.cmd(&format!("{}: {line}", session.current.name));
@@ -1977,18 +2075,79 @@ mod tests {
     }
 
     #[test]
-    fn completion_menu_paints_single_column_bars() {
-        let c = completer();
-        c.set_theme(crate::theme::find("ocean").unwrap());
-        let row = "│ ocean     │";
-        let out = c.highlight_candidate(row, rustyline::CompletionType::List);
+    fn completer_produces_suggestions_with_spans() {
+        // The reedline completer maps (start, candidates) onto suggestions
+        // whose span covers exactly the typed word.
+        let mut c = completer();
+        let suggs = c.complete("inst", 5);
+        assert!(!suggs.is_empty());
+        for s in &suggs {
+            assert_eq!(s.span.start, 0, "completes from the line start");
+            assert_eq!(s.span.end, 5);
+            assert!(s.value.starts_with("inst"), "value: {}", s.value);
+        }
+        let suggs = c.complete("install cl", 11);
+        assert_eq!(suggs[0].span.start, 8);
+        assert_eq!(suggs[0].span.end, 11);
+        assert!(suggs.iter().all(|s| s.value.starts_with("cl")));
+    }
+
+    #[test]
+    fn completer_suggestions_carry_descriptions() {
+        let mut c = completer();
+        let suggs = c.complete("star", 5);
+        assert!(suggs.iter().any(|s| {
+            s.value == "start" && s.description.as_deref() == Some("start an agent")
+        }));
+        // Path candidates (cd) have no description: the menu shows them in
+        // columnar layout instead of the single description column. The
+        // absolute path keeps the test independent from the process cwd.
+        let dir = tempfile::tempdir().unwrap();
+        std::fs::create_dir_all(dir.path().join("src")).unwrap();
+        let line = format!("cd {}", dir.path().display());
+        let suggs = c.complete(&line, line.len());
+        let sep = std::path::MAIN_SEPARATOR;
+        let expected = format!("{}{sep}", dir.path().display());
         assert!(
-            out.contains("\x1b[38;5;75m"),
-            "bars not painted with the frame color: {out}"
+            suggs.iter().any(|s| s.value == expected),
+            "expected {expected}: {suggs:?}"
         );
+        assert!(suggs.iter().all(|s| s.description.is_none()));
+    }
+
+    #[test]
+    fn sgr_theme_strings_map_to_ansi_term_styles() {
+        // "1;38;5;81" = bold + 256-color 81 (ocean accent).
+        let s = sgr_to_style("1;38;5;81");
+        assert!(s.is_bold, "accent should be bold");
+        let fg = s.foreground.expect("accent should set a color");
+        assert_eq!(fg, Color::Fixed(81));
+        // Basic ANSI colors ("36" = cyan) map onto the named palette.
+        let s = sgr_to_style("36");
+        assert_eq!(s.foreground, Some(Color::Cyan));
+        // The mono theme uses empty SGR strings: default style, no color.
+        let s = sgr_to_style("");
+        assert!(!s.is_bold);
+        assert_eq!(s.foreground, None);
+    }
+
+    #[test]
+    fn menu_styles_follow_the_theme() {
+        let ocean = crate::theme::find("ocean").unwrap();
+        let ts = menu_text_style(ocean, true);
         assert!(
-            out.contains("\x1b[1;38;5;81m"),
-            "name not painted with the accent color: {out}"
+            ts.selected_text_style.is_reverse,
+            "the highlighted choice must be in reverse video"
+        );
+        assert_eq!(
+            ts.selected_text_style.foreground,
+            Some(Color::Fixed(81)),
+            "the highlighted choice uses the accent color"
+        );
+        assert_eq!(
+            ts.description_style.foreground,
+            Some(Color::Fixed(117)),
+            "descriptions use the theme info color"
         );
     }
 
@@ -2051,4 +2210,35 @@ mod tests {
         assert!(s.ends_with("here"));
         assert!(s.chars().count() <= 9);
     }
+
+    #[cfg(windows)]
+    #[test]
+    fn split_command_keeps_windows_backslashes() {
+        // The core regression: 'cd dev\git\...' must not lose its
+        // backslashes (they are path separators on Windows, not escapes).
+        let tokens = split_command("cd dev\\git\\Rust\\agent-manager\\").unwrap();
+        assert_eq!(tokens, vec!["cd", "dev\\git\\Rust\\agent-manager\\"]);
+        let tokens = split_command("ls dev\\AI\\").unwrap();
+        assert_eq!(tokens, vec!["ls", "dev\\AI\\"]);
+    }
+
+    #[cfg(windows)]
+    #[test]
+    fn split_command_handles_quotes_and_whitespace() {
+        let tokens = split_command("cd \"my dir\"\\src").unwrap();
+        assert_eq!(tokens, vec!["cd", "my dir\\src"]);
+        let tokens = split_command("echo \"a\"\"b\"").unwrap();
+        assert_eq!(tokens, vec!["echo", "a\"b"]);
+        assert!(split_command("echo \"unterminated").is_err());
+        assert!(split_command("   ").unwrap().is_empty());
+    }
+
+    #[cfg(not(windows))]
+    #[test]
+    fn split_command_keeps_unix_escaping() {
+        let tokens = split_command("ls foo\\ bar").unwrap();
+        assert_eq!(tokens, vec!["ls", "foo bar"]);
+        let tokens = split_command("cd dev/git").unwrap();
+        assert_eq!(tokens, vec!["cd", "dev/git"]);
+    }
 }