fix: pos config ai splits llamacpp into its own section

LLAMACPP_* keys lived under a generic General group. Added a conditional
'@[AI_PROVIDER=llamacpp] llamacpp' caption (mirrors OpenRouter), so the
provider gets its own section; General now only holds AI_SYSTEM_PROMPT
plus the HF keys that arrive from pos-ai-hf. AI_PROVIDER description and
usage text mention llamacpp.

Also: inactive config groups no longer dim the key name — keys stay bold
so an inactive provider block is not one uniform grey wall; only values
and descriptions dim, and the caption still carries the inactive reason.

DOC/AGENT_Context_Project.md

@@ -652,7 +652,7 @@ Use conventional prefixes: `feat:`, `fix:`, `docs:`, `refactor:`, `chore:`
 | `bin/pos-system-health` | 209 | Host health dashboard (disk, RAM, services, backup age, fail2ban, docker); exit 1 if any FAIL |
 | `bin/pos-system-schedule` | 151 | Scheduled jobs: run a command on a timer; notify on threshold/change/error/always or silently |
 | `bin/pos-system-uninstall` | 435 | Remove pos toolkit binaries, services, shell integration, config, and data |
-| `bin/pos-ai` | 696 | AI assistant: ask, chat, sessions, capture, models, providers |
+| `bin/pos-ai` | 702 | AI assistant: ask, chat, sessions, capture, models, providers |
 | `bin/pos-config` | 80 | Interactive editor for the tools' runtime config (reads # POS_CONFIG: registry) |
 | `bin/pos-tree` | 118 | Show the pos CLI command tree: categories, commands, and subcommands |
 | `completions/pos.bash` | 312 | Dynamic bash completion |

bin/pos-ai

@@ -3,7 +3,7 @@ set -euo pipefail
 # POS: ai ask — AI assistant: ask, chat, sessions, capture, models, providers
 # POS_SUBCMDS: ask chat sessions capture models providers
 # POS_FLAGS: --provider --model --session --system --full --last --trust
-# POS_CONFIG: ai | ai.env | AI_PROVIDER=:Provider (gemini or openrouter, default gemini) | @[AI_PROVIDER=gemini|] Gemini | *providers=gemini | @[AI_PROVIDER=openrouter] OpenRouter | *providers=openrouter | @General | AI_SYSTEM_PROMPT=:Custom system prompt (overrides built-in, empty to reset) | LLAMACPP_PORT=:Server port (default 8088) | LLAMACPP_HOST=:Bind address (default 127.0.0.1) | LLAMACPP_MODEL=:Default model path (GGUF) | LLAMACPP_CTX_SIZE=num:Context window size (default 4096) | LLAMACPP_GPU_LAYERS=num:GPU layers (-1=auto, 0=CPU, default -1) | LLAMACPP_THREADS=num:CPU threads (default: nproc) | *providers=llamacpp
+# POS_CONFIG: ai | ai.env | AI_PROVIDER=:Provider (gemini, openrouter or llamacpp, default gemini) | @[AI_PROVIDER=gemini|] Gemini | *providers=gemini | @[AI_PROVIDER=openrouter] OpenRouter | *providers=openrouter | @[AI_PROVIDER=llamacpp] llamacpp | LLAMACPP_PORT=:Server port (default 8088) | LLAMACPP_HOST=:Bind address (default 127.0.0.1) | LLAMACPP_MODEL=:Default model path (GGUF) | LLAMACPP_CTX_SIZE=num:Context window size (default 4096) | LLAMACPP_GPU_LAYERS=num:GPU layers (-1=auto, 0=CPU, default -1) | LLAMACPP_THREADS=num:CPU threads (default: nproc) | *providers=llamacpp | @General | AI_SYSTEM_PROMPT=:Custom system prompt (overrides built-in, empty to reset)
 
 source "$(dirname "$0")/../lib/common.sh" 2>/dev/null || source "$(dirname "$0")/common.sh"
 
@@ -23,7 +23,7 @@ MAX_SESSION_TURNS=40
 LAST_LOG_MAX_BYTES=4096
 LAST_LOG_STALE_SECS=3600   # --last: warn when the attached log is older than this
 # Built-in terse ask prompt. cmd_ask appends a machine-context clause
-# (see machine_context) unless --system replaces it or --full drops everything.
+# (see machine_context) on EVERY ask — even --system/--full.
 DEFAULT_SYSTEM_PROMPT_HARD="You are a Linux CLI assistant. Rules:
 1. Lead with exact command(s) — no explanations unless asked
 2. One line max per command; short bullets for multi-step only
@@ -78,7 +78,7 @@ Options:
   -h|--help         This help.
 
 Config:  $CONFIG_FILE  (edit with 'pos config ai')
-  AI_PROVIDER         Provider to use (gemini|openrouter, default gemini)
+  AI_PROVIDER         Provider to use (gemini|openrouter|llamacpp, default gemini)
   AI_SYSTEM_PROMPT    Custom system prompt (overrides built-in; empty to reset)
   Provider keys:      auto-discovered from lib/ai-providers/*.sh
                       (AI_GEMINI_API_KEY, OPENROUTER_API_KEY, etc.)
@@ -502,7 +502,8 @@ cmd_ask() {
     fi
     require_key
     # Terse by default: user --system replaces the built-in prompt wholesale;
-    # --full skips everything (built-in text AND machine context).
+    # --full skips the built-in text. The machine-context line (hostname,
+    # distro, kernel, arch) is ALWAYS appended so every ask knows the box.
     system="$SYSTEM_PROMPT"
     if [ -z "$system" ] && [ "$FULL_MODE" -eq 0 ]; then
         # Check AI_SYSTEM_PROMPT config first, then fall back to built-in
@@ -510,9 +511,14 @@ cmd_ask() {
         if [ -z "$system" ]; then
             system="$DEFAULT_SYSTEM_PROMPT_HARD"
         fi
-        mc="$(machine_context)"
+    fi
+    mc="$(machine_context)"
+    if [ -n "$system" ]; then
         [ -n "$mc" ] && mc=" $mc"
         system="$system$mc"
+    else
+        # --full (no system text): carry machine context as the sole system turn
+        system="$mc"
     fi
     # Persistent session memory ('default' unless --session).
     messages="$(session_load)"

lib/config-ui.sh

@@ -552,12 +552,15 @@ cfg_ui() {
                 n=$((n + 1))
                 v="$(cfg_value "$file" "$k")"
                 disp="$(cfg_display "$v" "$f")"
-                [ "$disp" = "(not set)" ] && disp="${DIM}(not set)${RESET}"
-                if [ "$dim" -eq 1 ]; then
-                    printf '%s  %2d) %-28s %s%s\n' "$DIM" "$n" "$k" "$disp" "$RESET"
-                else
-                    printf '  %s%2d)%s %s%-28s%s %s\n' "$DIM" "$n" "$RESET" "$BOLD" "$k" "$RESET" "$disp"
+                if [ "$disp" = "(not set)" ]; then
+                    disp="${DIM}(not set)${RESET}"
+                elif [ "$dim" -eq 1 ]; then
+                    # Inactive group: key name stays bold/colored (readable);
+                    # only the value dims — the caption already carries the
+                    # inactive reason, so a fully grey block adds no signal.
+                    disp="${DIM}${disp}${RESET}"
                 fi
+                printf '  %s%2d)%s %s%-28s%s %s\n' "$DIM" "$n" "$RESET" "$BOLD" "$k" "$RESET" "$disp"
                 if [ -n "$d" ]; then
                     [ "$dim" -eq 1 ] && printf '%s' "$DIM"
                     _cfg_wrap "$d" "$wrapW" "      "