diff --git a/DECISIONS.md b/DECISIONS.md
index e7b0b3f..57b3f82 100644
--- a/DECISIONS.md
+++ b/DECISIONS.md
@@ -6,6 +6,45 @@
 
 ---
 
+## 2026-05-25 — Opt-in hook packs + stack profiles (public-prep posture)
+
+### Context
+
+The kit force-activated every hook via `settings-snippet.json`, including the
+author's personal research discipline (numeric-claims evidence markers,
+no-downgrade, citation-verify, rust-first / no-python). For a public,
+general-audience kit that is presumptuous — users bring their own stack and do
+not need a Rust-only policy or evidence-marker enforcement by default.
+
+### Decision
+
+- Posture: **safety hooks on by default; all discipline packs opt-in.** Packs:
+  `safety` (always), `evidence`, `observability`, `epistemic`, `orchestration`,
+  `git-guard`, `stack-rust`. SSoT = `_primitives/hook-packs.toml`.
+- **Stack profiles** (minimal / web / ml / systems / mobile) pull a set of
+  discipline packs AND an agent set. `rust-first` / `no-python` live only in
+  `stack-rust`, which only the `systems` stack enables. `git-guard`
+  (no-github-push) is opt-in only and pulled by NO stack — a general kit must
+  not block a user's normal `git push` to github.
+- Mechanism: install-time **filter** of the snippet by selected packs
+  (`filter_snippet_by_packs`) + **prune** of kit-owned hooks on reconfigure
+  (`prune_kit_hooks`, foreign hooks preserved). Selection persists to
+  `~/.claude/config/onboarding.toml`; re-runnable via `kei configure`.
+- Non-interactive / `--yes` / CI default = minimal (safety + cosmetic only),
+  all agents (back-compat for power users).
+
+### Consequences
+
+- Gate wiring (`_lib/gate.sh`) added to the 8 highest-friction discipline hooks
+  for runtime toggling via the `hooks-control` skill; remaining cosmetic/event
+  hooks deferred (install-time filtering already gives "off by default", so the
+  runtime gate is a convenience, not a correctness requirement).
+- Agent-set changes via `kei configure` apply on the next `./install.sh`
+  (reconfigure re-applies hooks fully but does not remove already-installed
+  agent manifests — they are harmless extra `.md` files).
+- `_toml_array` extracted from `lib-profile.sh:profile_members` as the shared
+  one-line-array TOML reader (no new dependency).
+
 ## 2026-04-28 — Three scheduling abstractions in workspace
 
 ### Context
diff --git a/_primitives/hook-packs.toml b/_primitives/hook-packs.toml
new file mode 100644
index 0000000..c87f2f8
--- /dev/null
+++ b/_primitives/hook-packs.toml
@@ -0,0 +1,55 @@
+# KeiSeiKit hook-pack + stack-profile map — single source of truth for the
+# opt-in install posture. Parsed by install/lib-packs.sh, which reuses the
+# generic TOML array reader `_toml_array` extracted from lib-profile.sh
+# (python-tomllib preferred, awk fallback). No new dependency.
+#
+# Values are HOOK BASENAMES WITHOUT `.sh`, matched against the command
+# basenames in settings-snippet.json. Every hook wired in the snippet MUST
+# appear in exactly one [pack] entry or in [pack-always]; anything missing
+# would be silently filtered out of a fresh install.
+#
+# Posture: only `safety` + `pack-always` are active on a fresh/non-interactive
+# install. All other packs are opt-in (via onboarding or `kei configure`).
+# `git-guard` (no-github-push) is opt-in ONLY and is pulled by NO stack — a
+# general kit must never block a user's normal `git push` to github by default.
+
+[pack]
+safety        = ["block-dangerous", "safety-guard", "destructive-guard", "disk-headroom-check", "secrets-pre-guard", "no-hand-edit-agents", "assemble-validate", "assemble-agents"]
+evidence      = ["numeric-claims-guard", "citation-verify", "chat-numeric-prewarn", "chat-numeric-postflag"]
+observability = ["task-timer", "session-end-dump", "extract-task-durations", "error-spike-detector", "agent-event-spawn", "agent-event-done", "agent-heartbeat-tick", "stop-verify"]
+epistemic     = ["alignment-check", "no-downgrade", "recurrence-suggest"]
+orchestration = ["agent-fork-logger", "agent-fork-done", "orchestrator-dirty-check", "orchestrator-branch-check", "agent-capability-check", "agent-stub-scan", "milestone-commit-hook", "post-commit-audit", "post-write-check"]
+git-guard     = ["no-github-push"]
+stack-rust    = ["rust-first", "no-python-without-approval"]
+
+# Always wired, never filtered (cosmetic / infra). The keisei-pet*.sh status
+# updater + the inline pet hook are kept by the filter directly (name match),
+# so they are NOT listed here.
+[pack-always]
+base = ["first-run-onboard", "mailbox-inject", "tomd-preread", "site-wysiwyd-check"]
+
+# Stack profile -> discipline packs auto-enabled (safety is always implicit).
+# git-guard intentionally absent from every stack (opt-in only).
+[stack-packs]
+minimal = []
+web     = ["evidence", "observability"]
+ml      = ["evidence", "observability", "epistemic"]
+systems = ["evidence", "observability", "stack-rust"]
+mobile  = ["evidence", "observability"]
+
+# Stack profile -> agent groups installed (the `base` group is always added).
+[stack-agents]
+minimal = ["base"]
+web     = ["base", "web"]
+ml      = ["base", "ml"]
+systems = ["base", "systems"]
+mobile  = ["base", "mobile"]
+
+# Agent group -> manifest basenames (without `.toml`). When no stack is chosen
+# (power user / --profile=full / non-interactive), ALL manifests install.
+[agent-set]
+base    = ["architect", "critic", "validator", "researcher", "code-implementer", "security-auditor"]
+web     = ["code-implementer-typescript", "frontend-validator", "validator-api", "validator-doc", "researcher-web", "researcher-code"]
+ml      = ["ml-implementer", "ml-researcher", "modal-runner", "cost-guardian", "fal-ai-runner", "code-implementer-python", "validator-benchmark"]
+systems = ["code-implementer-rust", "code-implementer-go", "infra-implementer", "infra-implementer-cicd", "infra-implementer-container", "infra-implementer-iac", "infra-implementer-secrets", "validator-version"]
+mobile  = ["code-implementer-swift", "code-implementer-flutter", "frontend-validator"]
diff --git a/bin/kei b/bin/kei
index b151d19..c7fc534 100755
--- a/bin/kei
+++ b/bin/kei
@@ -19,12 +19,17 @@
 set -e
 
 # --- subcommand dispatch (before splash) ---------------------------------
-# `kei message ...` → the mailbox CLI; everything else falls through to launch.
+# `kei message ...` → mailbox CLI; `kei configure` → hook/stack re-picker;
+# everything else falls through to launch.
 case "${1:-}" in
   message|msg|m)
     shift
     exec "$HOME/.claude/scripts/kei-message.sh" "$@"
     ;;
+  configure|config|reconfigure)
+    shift
+    exec "$HOME/.claude/scripts/kei-configure.sh" "$@"
+    ;;
 esac
 
 # --- args ----------------------------------------------------------------
diff --git a/docs/encyclopedia/hooks-and-blocks.md b/docs/encyclopedia/hooks-and-blocks.md
index 1535ac3..e879acc 100644
--- a/docs/encyclopedia/hooks-and-blocks.md
+++ b/docs/encyclopedia/hooks-and-blocks.md
@@ -28,6 +28,17 @@ All hooks live under `hooks/` directory. Format: `| Hook Name | Event | Severity
 - **remind (exit 0 + stderr on trigger)** — passive reminder
 - **advisory** — informational, never blocks
 
+### Hook packs (opt-in posture)
+
+A fresh install activates **only the `safety` pack** (plus cosmetic/infra hooks).
+Discipline packs are opt-in, chosen during onboarding (step 6) or later via
+`kei configure`. SSoT for pack membership + stack profiles is
+`_primitives/hook-packs.toml`. Packs: `safety` (always on), `evidence`,
+`observability`, `epistemic`, `orchestration`, `git-guard` (opt-in only),
+`stack-rust` (only under the `systems` stack profile). Discipline hooks also
+respect runtime toggling via `KEI_DISABLED_HOOKS` / `KEI_HOOK_PROFILE` (see the
+`hooks-control` skill).
+
 ### Core Safety Hooks
 
 | Hook | Event | Severity | Purpose | Bypass Env |
diff --git a/hooks/alignment-check.sh b/hooks/alignment-check.sh
index 9d08782..e197d96 100755
--- a/hooks/alignment-check.sh
+++ b/hooks/alignment-check.sh
@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+
+# Runtime gate (hooks-control skill / KEI_DISABLED_HOOKS / KEI_HOOK_PROFILE).
+_KEI_LIB="$(dirname "$0")/_lib/gate.sh"; if [ -r "$_KEI_LIB" ]; then . "$_KEI_LIB"; kei_hook_gate "alignment-check" || exit 0; fi
 # ALIGNMENT CHECK HOOK
 # Fires on UserPromptSubmit when comparison/experiment keywords detected.
 # THREE-TIME REPEAT BUG: exp6, exp24-28, basecaller — all forgot alignment.
diff --git a/hooks/chat-numeric-postflag.sh b/hooks/chat-numeric-postflag.sh
index fc18969..4769996 100755
--- a/hooks/chat-numeric-postflag.sh
+++ b/hooks/chat-numeric-postflag.sh
@@ -1,4 +1,7 @@
 #!/bin/sh
+
+# Runtime gate (hooks-control skill / KEI_DISABLED_HOOKS / KEI_HOOK_PROFILE).
+_KEI_LIB="$(dirname "$0")/_lib/gate.sh"; if [ -r "$_KEI_LIB" ]; then . "$_KEI_LIB"; kei_hook_gate "chat-numeric-postflag" || exit 0; fi
 # chat-numeric-postflag.sh — Stop warn (RULE 0.18 chat-output)
 #
 # Reads the session transcript, extracts the last assistant message,
diff --git a/hooks/chat-numeric-prewarn.sh b/hooks/chat-numeric-prewarn.sh
index 8d8411b..6655118 100755
--- a/hooks/chat-numeric-prewarn.sh
+++ b/hooks/chat-numeric-prewarn.sh
@@ -1,4 +1,7 @@
 #!/bin/sh
+
+# Runtime gate (hooks-control skill / KEI_DISABLED_HOOKS / KEI_HOOK_PROFILE).
+_KEI_LIB="$(dirname "$0")/_lib/gate.sh"; if [ -r "$_KEI_LIB" ]; then . "$_KEI_LIB"; kei_hook_gate "chat-numeric-prewarn" || exit 0; fi
 # chat-numeric-prewarn.sh — UserPromptSubmit remind (RULE 0.18 chat-output)
 #
 # Detects time/cost/effort keywords in the user's prompt and injects an
diff --git a/hooks/citation-verify.sh b/hooks/citation-verify.sh
index 7f473e9..57bc142 100755
--- a/hooks/citation-verify.sh
+++ b/hooks/citation-verify.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
+
+# Runtime gate (hooks-control skill / KEI_DISABLED_HOOKS / KEI_HOOK_PROFILE).
+_KEI_LIB="$(dirname "$0")/_lib/gate.sh"; if [ -r "$_KEI_LIB" ]; then . "$_KEI_LIB"; kei_hook_gate "citation-verify" || exit 0; fi
 # PreToolUse(Edit|Write) — block unverified academic citations
 #
 # Rule 0.5 NO HALLUCINATION enforcer.
diff --git a/hooks/no-downgrade.sh b/hooks/no-downgrade.sh
index 8bcf491..f12e612 100755
--- a/hooks/no-downgrade.sh
+++ b/hooks/no-downgrade.sh
@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+
+# Runtime gate (hooks-control skill / KEI_DISABLED_HOOKS / KEI_HOOK_PROFILE).
+_KEI_LIB="$(dirname "$0")/_lib/gate.sh"; if [ -r "$_KEI_LIB" ]; then . "$_KEI_LIB"; kei_hook_gate "no-downgrade" || exit 0; fi
 # RULE -1 NO DOWNGRADE / CONSTRUCTIVE ONLY (2026-04-15 LOCK) enforcement.
 #
 # Detects downgrade-style phrases in Write/Edit content without accompanying
diff --git a/hooks/no-python-without-approval.sh b/hooks/no-python-without-approval.sh
index 9bd28ba..103280c 100755
--- a/hooks/no-python-without-approval.sh
+++ b/hooks/no-python-without-approval.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
+
+# Runtime gate (hooks-control skill / KEI_DISABLED_HOOKS / KEI_HOOK_PROFILE).
+_KEI_LIB="$(dirname "$0")/_lib/gate.sh"; if [ -r "$_KEI_LIB" ]; then . "$_KEI_LIB"; kei_hook_gate "no-python-without-approval" || exit 0; fi
 # Hard block on python/python3/python2 invocations in Bash tool.
 # RULE 0.2 (Rust First) — Python requires explicit architectural reason.
 # Claude кroнически нарушает RULE 0.2 inline-вызовами python3 для мелких расчётов.
diff --git a/hooks/numeric-claims-guard.sh b/hooks/numeric-claims-guard.sh
index 28570de..7d373e1 100755
--- a/hooks/numeric-claims-guard.sh
+++ b/hooks/numeric-claims-guard.sh
@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+
+# Runtime gate (hooks-control skill / KEI_DISABLED_HOOKS / KEI_HOOK_PROFILE).
+_KEI_LIB="$(dirname "$0")/_lib/gate.sh"; if [ -r "$_KEI_LIB" ]; then . "$_KEI_LIB"; kei_hook_gate "numeric-claims-guard" || exit 0; fi
 # RULE 0.18 — Numeric claim enforcement — block Edit/Write of numeric claims
 # without evidence marker. Bypass: RULE_017_BYPASS=1 prefix (kept for compat).
 #
@@ -26,7 +29,7 @@ fi
 # - "N MB/GB/LOC/tests/crates/atomars"
 # - "~$N", "$N/mo"
 # - "Nm Ns", "займёт N", "should take N"
-NUMERIC_PATTERN='(~\s*[0-9]+(\.[0-9]+)?\s*(min|minute|hour|hr|day|week|month|sec|second|MB|GB|KB|LOC|line|test|crate|atomar|%|µs|ms|ns|TPS|req/s)|[0-9]+m\s*[0-9]+s|\$[0-9]+(\.[0-9]+)?(/(mo|hr|day|run))?|~\s*\$[0-9]+|should take|will take|takes about|займёт|за ~|estimated at|ETA[: ]|approximately\s+[0-9])'
+NUMERIC_PATTERN='(~\s*[0-9]+(\.[0-9]+)?\s*(min|minute|hour|hr|day|week|month|sec|second|MB|GB|KB|LOC|line|test|crate|atomar|%|µs|ms|ns|TPS|req/s)|[0-9]+m\s*[0-9]+s|\$[0-9]+\.[0-9]+|\$[0-9]+/(mo|hr|day|run)|\$[0-9]{2,}|~\s*\$[0-9]+|should take|will take|takes about|займёт|за ~|estimated at|ETA[: ]|approximately\s+[0-9])'
 
 # Markers that satisfy the rule
 EVIDENCE_PATTERN='\[(REAL|FROM-JOURNAL|ESTIMATE-HTC)[: ]'
diff --git a/hooks/rust-first.sh b/hooks/rust-first.sh
index 15a3c70..2c665e1 100755
--- a/hooks/rust-first.sh
+++ b/hooks/rust-first.sh
@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+
+# Runtime gate (hooks-control skill / KEI_DISABLED_HOOKS / KEI_HOOK_PROFILE).
+_KEI_LIB="$(dirname "$0")/_lib/gate.sh"; if [ -r "$_KEI_LIB" ]; then . "$_KEI_LIB"; kei_hook_gate "rust-first" || exit 0; fi
 # RULE 0.2 — RUST FIRST reminder hook.
 #
 # Fires on UserPromptSubmit. Detects keywords indicating language choice
diff --git a/install.sh b/install.sh
index b849207..3c9ded1 100755
--- a/install.sh
+++ b/install.sh
@@ -37,6 +37,8 @@ source "$LIB_DIR/lib-log.sh"
 source "$LIB_DIR/lib-backup.sh"
 # shellcheck source=install/lib-profile.sh
 source "$LIB_DIR/lib-profile.sh"
+# shellcheck source=install/lib-packs.sh
+source "$LIB_DIR/lib-packs.sh"
 # shellcheck source=install/lib-args.sh
 source "$LIB_DIR/lib-args.sh"
 # shellcheck source=install/lib-menu.sh
@@ -150,6 +152,8 @@ say "profile: $PROFILE"
 # Stamp the chosen profile so `kei` splash + tools can show it (bin/kei reads this).
 mkdir -p "$HOME_DIR/.claude" 2>/dev/null || true
 printf '%s\n' "$PROFILE" > "$HOME_DIR/.claude/.kei-profile" 2>/dev/null || true
+# Stamp the kit checkout dir so `kei configure` can re-source the libs later.
+printf '%s\n' "$KIT_DIR" > "$HOME_DIR/.claude/.kei-kit-dir" 2>/dev/null || true
 
 # --- resolve profile -> primitive list (UNCONDITIONAL, SSoT) -------------
 # Must run BEFORE any reader of PROFILE_PRIMS: the --no-execute plan block
diff --git a/install/i18n/en.sh b/install/i18n/en.sh
index 3c975fa..5184157 100644
--- a/install/i18n/en.sh
+++ b/install/i18n/en.sh
@@ -6,7 +6,7 @@ STR_WELCOME_TITLE="KeiSeiKit · Exobrain installer"
 STR_WELCOME_TAGLINE="Portable Rust agent substrate for AI coding tools"
 
 # Onboarding wizard steps
-STR_ONBOARDING_INTRO="Onboarding wizard (5 steps)"
+STR_ONBOARDING_INTRO="Onboarding wizard (6 steps)"
 STR_PICK_LANGUAGE="Choose interface language:"
 STR_PICK_TRANSPORT="Choose connection transport:"
 STR_PICK_PROVIDER="Choose provider within"
@@ -46,3 +46,19 @@ STR_PICK_INVALID="please type one of the numbers shown"
 STR_EXPLAIN_TRANSPORT="How the agents reach the AI. subscription = log in with your plan, no API key (Claude Code is option 1); direct-api = your own API key. Press Enter for the default."
 STR_EXPLAIN_PROVIDER="Which AI service. Option 1 is the recommended default — press Enter."
 STR_EXPLAIN_MODEL="Default model the agents use. Option 1 is the recommended default — press Enter."
+
+# Stack profile + hook-pack picker (step 6)
+STR_PICK_STACK="Pick your stack profile (selects which hooks + agents install):"
+STR_PICK_STACK_PROMPT="[1-5, default 1=minimal]: "
+STR_STACK_MINIMAL="safety hooks + core agents only"
+STR_STACK_WEB="TS/frontend agents + evidence, observability"
+STR_STACK_ML="ML/data agents + evidence, observability, epistemic"
+STR_STACK_SYSTEMS="Rust/Go agents + Rust-first + evidence, observability"
+STR_STACK_MOBILE="Swift/Flutter agents + evidence, observability"
+STR_PACK_INTRO="Optional discipline packs (safety is always on):"
+STR_PACK_EVIDENCE="force evidence markers on numeric/cost claims"
+STR_PACK_OBS="task timing, session dumps, agent telemetry"
+STR_PACK_EPI="no-downgrade + alignment + recurrence reminders"
+STR_PACK_ORCH="multi-agent fork logging + orchestrator git checks"
+STR_PACK_GIT="block git push to github (for private-remote teams)"
+STR_PACK_ENABLE="enable? [y/N]: "
diff --git a/install/lib-agents.sh b/install/lib-agents.sh
index b595aea..1e813d6 100644
--- a/install/lib-agents.sh
+++ b/install/lib-agents.sh
@@ -14,9 +14,18 @@
 # when present.
 install_manifests() {
   say "copying generic manifests -> $AGENTS_DIR/_manifests/ (skip if exists)"
-  local copied=0 skipped=0 f name t has_templates=0
+  # Stack filter: when a stack profile is chosen, install only its agent set.
+  # Empty allowlist (no stack / non-interactive) => install ALL (back-compat).
+  local allow=""
+  if command -v resolve_selected_agent_manifests >/dev/null 2>&1; then
+    allow="$(resolve_selected_agent_manifests)"
+  fi
+  local copied=0 skipped=0 filtered=0 f name t has_templates=0
   for f in "$KIT_DIR/_manifests/"*.toml; do
     name="$(basename "$f")"
+    if [ -n "$allow" ] && ! printf '%s\n' "$allow" | grep -qx "${name%.toml}"; then
+      filtered=$((filtered+1)); continue
+    fi
     if [[ -f "$AGENTS_DIR/_manifests/$name" ]]; then
       skipped=$((skipped+1))
     else
@@ -24,7 +33,11 @@ install_manifests() {
       copied=$((copied+1))
     fi
   done
-  say "  copied $copied, skipped $skipped (already present)"
+  if [ -n "$allow" ]; then
+    say "  copied $copied, skipped $skipped, stack-filtered $filtered"
+  else
+    say "  copied $copied, skipped $skipped (already present)"
+  fi
 
   for t in "$KIT_DIR/_templates/"*.template; do
     [ -f "$t" ] && { has_templates=1; break; }
diff --git a/install/lib-hooks.sh b/install/lib-hooks.sh
index ce09f8d..8f6bcb2 100644
--- a/install/lib-hooks.sh
+++ b/install/lib-hooks.sh
@@ -102,20 +102,64 @@ _jq_merge_hooks() {
   fi
 }
 
+# Write a filtered copy of the snippet keeping only hook entries whose command
+# basename is in the newline allowlist (plus the cosmetic pet hooks, always
+# kept). Drops emptied matcher groups. Echoes the temp path. Arg: $1 = allowlist.
+filter_snippet_by_packs() {
+  local allow="$1" snippet="$KIT_DIR/settings-snippet.json" tmp
+  tmp="$(mktemp -t kei-snippet.XXXXXX)"
+  jq --arg allow "$allow" '
+    def b: sub("^.*/"; "") | sub("\\.sh$"; "");
+    def keep($ok; $c): (($c | b) as $x | ($ok | index($x)) != null)
+                       or ($c | test("keisei-pet")) or ($c | test("^CMD="));
+    ($allow | split("\n") | map(select(length > 0))) as $ok
+    | .hooks |= with_entries(
+        .value |= ( map(.hooks |= map(select(keep($ok; .command))))
+                    | map(select((.hooks | length) > 0)) )
+      )
+  ' "$snippet" > "$tmp" || { err "snippet filter failed"; rm -f "$tmp"; return 1; }
+  printf '%s' "$tmp"
+}
+
+# Remove every kit-owned hook entry from an existing settings.json (ownership =
+# basename in the full pack universe, plus pet hooks). Foreign hooks survive.
+# Lets reconfigure REMOVE deselected hooks (the merge alone is additive-only).
+# Args: $1 = target settings.json, $2 = newline list of all kit hook basenames.
+prune_kit_hooks() {
+  local target="$1" universe="$2" tmp
+  tmp="$(mktemp "$target.XXXXXX")"
+  jq --arg universe "$universe" '
+    def b: sub("^.*/"; "") | sub("\\.sh$"; "");
+    def owned($kit; $c): (($c | b) as $x | ($kit | index($x)) != null)
+                         or ($c | test("keisei-pet")) or ($c | test("^CMD="));
+    ($universe | split("\n") | map(select(length > 0))) as $kit
+    | .hooks |= with_entries(
+        .value |= ( map(.hooks |= map(select(owned($kit; .command) | not)))
+                    | map(select((.hooks | length) > 0)) )
+      )
+  ' "$target" > "$tmp" && mv "$tmp" "$target" || { err "prune failed"; rm -f "$tmp"; return 1; }
+}
+
 activate_hooks() {
   local snippet="$KIT_DIR/settings-snippet.json"
   local target="$HOME_DIR/.claude/settings.json"
   [ -f "$snippet" ] || { warn "no snippet at $snippet"; return 0; }
+  local allow filtered
+  allow="$(resolve_selected_hook_basenames)"
+  filtered="$(filter_snippet_by_packs "$allow")" || return 1
   if [ ! -f "$target" ]; then
     local tmp
     tmp="$(mktemp "$target.XXXXXX")"
-    jq 'del(._comment)' "$snippet" > "$tmp"
+    jq 'del(._comment)' "$filtered" > "$tmp"
     mv "$tmp" "$target"
-    say "created $target from snippet (no prior settings.json)"
+    rm -f "$filtered"
+    say "created $target from filtered snippet"
     return 0
   fi
   backup_file "$target"
-  _jq_merge_hooks "$snippet" "$target"
+  prune_kit_hooks "$target" "$(all_pack_basenames)"
+  _jq_merge_hooks "$filtered" "$target"
+  rm -f "$filtered"
 }
 
 # Flag-or-prompt dispatcher, mirroring the v0.15 behavior:
diff --git a/install/lib-onboarding-state.sh b/install/lib-onboarding-state.sh
index e89f0ee..0395898 100644
--- a/install/lib-onboarding-state.sh
+++ b/install/lib-onboarding-state.sh
@@ -39,6 +39,8 @@ language = "$ONBOARDING_LANG"
 transport = "$ONBOARDING_TRANSPORT"
 provider = "$ONBOARDING_PROVIDER"
 default_model = "$ONBOARDING_MODEL"
+stack_profile = "$ONBOARDING_STACK"
+enabled_packs = "$ONBOARDING_PACKS"
 EOF
 
   # Override для kei-model-router (HIGH аудит-1).
diff --git a/install/lib-onboarding-ui.sh b/install/lib-onboarding-ui.sh
index 0b80413..58076ed 100644
--- a/install/lib-onboarding-ui.sh
+++ b/install/lib-onboarding-ui.sh
@@ -29,6 +29,53 @@ _onb_read_choice() {
   done
 }
 
+# Step 6 — pick a stack profile (selects which discipline hooks + agents
+# install) then optionally toggle discipline packs the stack does not pull.
+# Sets ONBOARDING_STACK + ONBOARDING_PACKS. Reuses _onb_read_choice + stack_packs
+# (lib-packs.sh). Default = minimal (safety hooks + core agents only).
+onboarding_pick_stack() {
+  echo "" >&2
+  printf '%s\n' "${STR_PICK_STACK:-Pick your stack profile (selects hooks + agents):}" >&2
+  local opts="minimal web ml systems mobile" i=1 o d ans
+  for o in $opts; do
+    case "$o" in
+      minimal) d="${STR_STACK_MINIMAL:-safety hooks + core agents only}" ;;
+      web)     d="${STR_STACK_WEB:-TS/frontend agents + evidence, observability}" ;;
+      ml)      d="${STR_STACK_ML:-ML/data agents + evidence, observability, epistemic}" ;;
+      systems) d="${STR_STACK_SYSTEMS:-Rust/Go agents + Rust-first + evidence, observability}" ;;
+      mobile)  d="${STR_STACK_MOBILE:-Swift/Flutter agents + evidence, observability}" ;;
+    esac
+    printf '  %d) %-8s — %s\n' "$i" "$o" "$d" >&2
+    i=$((i+1))
+  done
+  ans="$(_onb_read_choice 5 "${STR_PICK_STACK_PROMPT:-[1-5, default 1=minimal]: }")"
+  ONBOARDING_STACK="$(echo "$opts" | cut -d' ' -f"$ans")"
+  [ -n "$ONBOARDING_STACK" ] || ONBOARDING_STACK="minimal"
+
+  # Offer discipline packs the chosen stack does not already enable.
+  local stackpacks p pd reply
+  stackpacks=" $(command -v stack_packs >/dev/null 2>&1 && stack_packs "$ONBOARDING_STACK") "
+  ONBOARDING_PACKS=""
+  printf '%s\n' "${STR_PACK_INTRO:-Optional discipline packs (safety is always on):}" >&2
+  for p in evidence observability epistemic orchestration git-guard; do
+    case "$stackpacks" in *" $p "*) continue ;; esac
+    case "$p" in
+      evidence)      pd="${STR_PACK_EVIDENCE:-force evidence markers on numeric/cost claims}" ;;
+      observability) pd="${STR_PACK_OBS:-task timing, session dumps, agent telemetry}" ;;
+      epistemic)     pd="${STR_PACK_EPI:-no-downgrade + alignment + recurrence reminders}" ;;
+      orchestration) pd="${STR_PACK_ORCH:-multi-agent fork logging + orchestrator git checks}" ;;
+      git-guard)     pd="${STR_PACK_GIT:-block git push to github (for private-remote teams)}" ;;
+    esac
+    printf '  + %-13s — %s\n' "$p" "$pd" >&2
+    read -r -p "    ${STR_PACK_ENABLE:-enable? [y/N]: }" reply
+    case "$reply" in y|Y|yes|YES) ONBOARDING_PACKS="$ONBOARDING_PACKS $p" ;; esac
+  done
+  ONBOARDING_PACKS="$(echo "$ONBOARDING_PACKS" | sed 's/^ *//;s/ *$//')"
+  if command -v say >/dev/null 2>&1; then
+    say "stack: $ONBOARDING_STACK  packs: ${ONBOARDING_PACKS:-(stack defaults only)}"
+  fi
+}
+
 onboarding_pick_language() {
   local langs
   langs="$(i18n_available_languages 2>/dev/null)"
diff --git a/install/lib-onboarding.sh b/install/lib-onboarding.sh
index 444bc5a..91ead5e 100644
--- a/install/lib-onboarding.sh
+++ b/install/lib-onboarding.sh
@@ -20,6 +20,8 @@ ONBOARDING_LANG=""
 ONBOARDING_TRANSPORT=""
 ONBOARDING_PROVIDER=""
 ONBOARDING_MODEL=""
+ONBOARDING_STACK=""
+ONBOARDING_PACKS=""
 declare -a ONBOARDING_AUTH_ENV_KEYS=()
 declare -a ONBOARDING_AUTH_ENV_VALUES=()
 
@@ -49,20 +51,21 @@ onboarding_should_run() {
   return 0
 }
 
-# Оркестратор: 5 шагов + preflight + запись.
+# Оркестратор: 6 шагов + preflight + запись.
 onboarding_run() {
   onboarding_should_run || return 0
 
   if command -v say >/dev/null 2>&1; then
-    say "${STR_ONBOARDING_INTRO:-Onboarding wizard (5 steps)}"
+    say "${STR_ONBOARDING_INTRO:-Onboarding wizard (6 steps)}"
   else
-    echo "── KeiSei: ${STR_ONBOARDING_INTRO:-onboarding (5 steps)} ──" >&2
+    echo "── KeiSei: ${STR_ONBOARDING_INTRO:-onboarding (6 steps)} ──" >&2
   fi
 
   onboarding_pick_language
   onboarding_pick_transport
   onboarding_pick_provider
   onboarding_pick_model
+  onboarding_pick_stack
 
   # Preflight — провайдер-специфичная проверка CLI/daemon до сбора ключей.
   if command -v preflight_run >/dev/null 2>&1; then
diff --git a/install/lib-packs.sh b/install/lib-packs.sh
new file mode 100644
index 0000000..e6f00cd
--- /dev/null
+++ b/install/lib-packs.sh
@@ -0,0 +1,74 @@
+# shellcheck shell=bash
+# lib-packs.sh — hook-pack + stack-profile resolver. Reads _primitives/hook-packs.toml
+# via the generic _toml_array reader (from lib-profile.sh). Decides which hooks get
+# wired into settings.json and which agent manifests install, based on the user's
+# onboarding selection (or the safe minimal default when none was made).
+#
+# Requires: _toml_array from lib-profile.sh.
+# Reads globals: $KIT_DIR (kit checkout), optional $ONBOARDING_STACK / $ONBOARDING_PACKS
+#                (live onboarding), optional $ONBOARDING_CONFIG (persisted selection).
+
+PACKS_TOML="${PACKS_TOML:-$KIT_DIR/_primitives/hook-packs.toml}"
+
+# --- thin table readers ---------------------------------------------------
+pack_hooks()         { _toml_array "$PACKS_TOML" "pack"         "$1"; }
+stack_packs()        { _toml_array "$PACKS_TOML" "stack-packs"  "$1"; }
+stack_agent_groups() { _toml_array "$PACKS_TOML" "stack-agents" "$1"; }
+agent_set_members()  { _toml_array "$PACKS_TOML" "agent-set"    "$1"; }
+_packs_always()      { _toml_array "$PACKS_TOML" "pack-always"  "base"; }
+
+# --- selection (live onboarding globals > persisted toml > none) ----------
+# Echo the chosen stack, or empty if the user never chose one.
+_packs_chosen_stack() {
+  if [ -n "${ONBOARDING_STACK:-}" ]; then printf '%s' "$ONBOARDING_STACK"; return; fi
+  local cfg="${ONBOARDING_CONFIG:-$HOME/.claude/config/onboarding.toml}"
+  [ -f "$cfg" ] && grep -E '^stack_profile[[:space:]]*=' "$cfg" \
+    | sed -E 's/.*=[[:space:]]*"?([^"]*)"?[[:space:]]*$/\1/' | head -1
+}
+# Echo the explicitly enabled packs (space-separated), or empty.
+_packs_chosen_packs() {
+  if [ -n "${ONBOARDING_PACKS:-}" ]; then printf '%s' "$ONBOARDING_PACKS"; return; fi
+  local cfg="${ONBOARDING_CONFIG:-$HOME/.claude/config/onboarding.toml}"
+  [ -f "$cfg" ] && grep -E '^enabled_packs[[:space:]]*=' "$cfg" \
+    | sed -E 's/.*=[[:space:]]*"?([^"]*)"?[[:space:]]*$/\1/' | head -1
+}
+
+# --- resolution -----------------------------------------------------------
+# Newline list of hook basenames to wire on install: safety + always + every
+# pack pulled by the chosen stack + every explicitly enabled pack. Default
+# (no choice) = safety + always only.
+resolve_selected_hook_basenames() {
+  local stack packs p out
+  stack="$(_packs_chosen_stack)"; stack="${stack:-minimal}"
+  packs="$(_packs_chosen_packs)"
+  out="$(pack_hooks safety) $(_packs_always)"
+  for p in $(stack_packs "$stack") $packs; do
+    out="$out $(pack_hooks "$p")"
+  done
+  echo "$out" | tr ' ' '\n' | grep -v '^$' | sort -u
+}
+
+# Newline list of agent manifest basenames to install for the chosen stack
+# (base group always included). EMPTY when no stack was chosen → caller
+# installs ALL manifests (power-user / non-interactive default).
+resolve_selected_agent_manifests() {
+  local stack g out
+  stack="$(_packs_chosen_stack)"
+  [ -n "$stack" ] || return 0
+  out=""
+  for g in $(stack_agent_groups "$stack"); do
+    out="$out $(agent_set_members "$g")"
+  done
+  echo "$out" | tr ' ' '\n' | grep -v '^$' | sort -u
+}
+
+# Newline list of EVERY kit-owned hook basename (all packs + always). Used by
+# prune_kit_hooks to identify which settings.json entries the kit owns.
+all_pack_basenames() {
+  local p out=""
+  for p in safety evidence observability epistemic orchestration git-guard stack-rust; do
+    out="$out $(pack_hooks "$p")"
+  done
+  out="$out $(_packs_always)"
+  echo "$out" | tr ' ' '\n' | grep -v '^$' | sort -u
+}
diff --git a/install/lib-profile.sh b/install/lib-profile.sh
index d286f3e..6ca442c 100644
--- a/install/lib-profile.sh
+++ b/install/lib-profile.sh
@@ -19,13 +19,16 @@ have_python_toml() {
   return 1
 }
 
-# Echo space-separated primitive names for a given profile.
-# Usage: profile_members <profile-name>
-profile_members() {
-  local profile="$1"
-  [ -f "$MANIFEST" ] || { err "MANIFEST.toml not found at $MANIFEST"; return 1; }
+# Generic one-line-array TOML reader. Echoes space-separated values of
+#   [<table>]
+#   <key> = ["a", "b", ...]
+# python-tomllib preferred; awk fallback handles one-line arrays only.
+# Usage: _toml_array <file> <table> <key>
+_toml_array() {
+  local file="$1" table="$2" key="$3"
+  [ -f "$file" ] || return 1
   if have_python_toml; then
-    python3 - "$MANIFEST" "$profile" <<'PY' 2>/dev/null || return 1
+    python3 - "$file" "$table" "$key" <<'PY' 2>/dev/null || return 1
 import sys
 try:
     import tomllib
@@ -33,20 +36,19 @@ try:
 except ImportError:
     import toml as tomllib
     mode = "r"
-path, prof = sys.argv[1], sys.argv[2]
+path, table, key = sys.argv[1], sys.argv[2], sys.argv[3]
 with open(path, mode) as f:
-    data = tomllib.load(f) if mode == "rb" else tomllib.load(f)
-members = data.get("profile", {}).get(prof)
-if members is None:
+    data = tomllib.load(f)
+vals = data.get(table, {}).get(key)
+if vals is None:
     sys.exit(2)
-print(" ".join(members))
+print(" ".join(vals))
 PY
   else
-    # awk fallback — only handles `profile.<name> = [...]` on one line
-    awk -v prof="$profile" '
-      /^\[profile\]/ { in_profile=1; next }
-      /^\[/ && !/^\[profile\]/ { in_profile=0 }
-      in_profile && $0 ~ "^[[:space:]]*" prof "[[:space:]]*=" {
+    awk -v table="$table" -v key="$key" '
+      $0 ~ "^\\[" table "\\]" { in_t=1; next }
+      /^\[/ { in_t=0 }
+      in_t && $0 ~ "^[[:space:]]*" key "[[:space:]]*=" {
         line = $0
         sub(/^[^\[]*\[/, "", line)
         sub(/\].*$/, "", line)
@@ -55,10 +57,18 @@ PY
         print line
         exit
       }
-    ' "$MANIFEST"
+    ' "$file"
   fi
 }
 
+# Echo space-separated primitive names for a given profile.
+# Usage: profile_members <profile-name>
+profile_members() {
+  local profile="$1"
+  [ -f "$MANIFEST" ] || { err "MANIFEST.toml not found at $MANIFEST"; return 1; }
+  _toml_array "$MANIFEST" "profile" "$profile"
+}
+
 # Echo a field of a primitive. Usage: primitive_field <name> <field>
 #   field ∈ { kind, file, crate, desc, deps }
 primitive_field() {
diff --git a/scripts/kei-configure.sh b/scripts/kei-configure.sh
new file mode 100644
index 0000000..0188e06
--- /dev/null
+++ b/scripts/kei-configure.sh
@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+# kei-configure — re-pick hook packs + stack profile after install, without a
+# full reinstall. Updates ~/.claude/config/onboarding.toml and re-applies the
+# hook selection to settings.json (adds newly selected hooks, removes deselected
+# kit hooks, leaves your own hooks untouched). Agent-set changes apply on the
+# next `./install.sh`.
+#
+# Invoked via `kei configure`. Interactive (needs a terminal).
+set -u
+set -o pipefail 2>/dev/null || true
+
+HOME_DIR="${HOME:?HOME not set}"
+KIT_DIR="$(cat "$HOME_DIR/.claude/.kei-kit-dir" 2>/dev/null || true)"
+if [ -z "$KIT_DIR" ] || [ ! -d "$KIT_DIR/install" ]; then
+  echo "kei configure: KeiSeiKit checkout not found." >&2
+  echo "  (expected its path in ~/.claude/.kei-kit-dir; re-run ./install.sh from your checkout)" >&2
+  exit 1
+fi
+if [ ! -t 0 ]; then
+  echo "kei configure: interactive only — run it from a terminal." >&2
+  exit 1
+fi
+
+LIB_DIR="$KIT_DIR/install"
+MANIFEST="$KIT_DIR/_primitives/MANIFEST.toml"
+PACKS_TOML="$KIT_DIR/_primitives/hook-packs.toml"
+ONBOARDING_CONFIG="$HOME_DIR/.claude/config/onboarding.toml"
+export HOME_DIR KIT_DIR LIB_DIR MANIFEST PACKS_TOML ONBOARDING_CONFIG
+
+# shellcheck source=/dev/null
+source "$LIB_DIR/lib-log.sh"
+# shellcheck source=/dev/null
+source "$LIB_DIR/lib-backup.sh"
+# shellcheck source=/dev/null
+source "$LIB_DIR/lib-profile.sh"
+# shellcheck source=/dev/null
+source "$LIB_DIR/lib-packs.sh"
+# shellcheck source=/dev/null
+source "$LIB_DIR/lib-hooks.sh"
+# shellcheck source=/dev/null
+source "$LIB_DIR/lib-onboarding-ui.sh"
+
+ONBOARDING_STACK=""
+ONBOARDING_PACKS=""
+onboarding_pick_stack
+
+# Update only stack_profile/enabled_packs in onboarding.toml; preserve the rest.
+mkdir -p "$(dirname "$ONBOARDING_CONFIG")"
+touch "$ONBOARDING_CONFIG"
+_tmp="$(mktemp)"
+grep -vE '^(stack_profile|enabled_packs)[[:space:]]*=' "$ONBOARDING_CONFIG" > "$_tmp" 2>/dev/null || true
+{
+  printf 'stack_profile = "%s"\n' "$ONBOARDING_STACK"
+  printf 'enabled_packs = "%s"\n' "$ONBOARDING_PACKS"
+} >> "$_tmp"
+mv "$_tmp" "$ONBOARDING_CONFIG"
+
+# Re-apply hooks: prune kit-owned entries, merge the newly selected set.
+activate_hooks
+
+say "reconfigured: stack=$ONBOARDING_STACK packs=${ONBOARDING_PACKS:-none}"
+say "  settings.json hooks updated. Agent-set changes apply on the next ./install.sh."