diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 6a5917285f..7f0cf698e7 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -961,6 +961,31 @@ repos:
         always_run: true
         stages: [pre-commit]
         files: ^(\.pre-commit-config\.yaml|\.github/workflows/(canonical-inference-gate|url-authority-gate)\.yml)$
+  # Governed impacted-test selector at PRE-PUSH (OMN-13973 / WS7 OMN-14655 fan-out;
+  # canary = omnibase_core#1451). Runs the fast local IMPACTED SUBSET of the unit
+  # suite once per `git push`, via the SAME selector CI uses
+  # (scripts/ci/detect_test_paths.py + test_selection_adjacency.yaml,
+  # ENABLE_SMART_TESTS) -- never a hand-typed -k. PER-REPO SEAM-MATCH, not a paste:
+  # infra's selector hardcodes SRC_PREFIX=src/omnibase_infra/ + its own adjacency
+  # map and, unlike core, does NOT accept `--base-ref`, so the wrapper omits it.
+  # Fail-closed: escalates to the full UNIT suite when it cannot prove narrowing is
+  # safe (shared module / pyproject deps / tests infra / >=6 modules / main).
+  # NET-NEGATIVE-SURFACE: retires the "run the whole unit suite by hand before every
+  # push" default (root CLAUDE.md Rule #4). This is a fast local impacted subset
+  # ADVISORY of the full CI suite -- NOT byte-parity with an enforced CI context (on
+  # CI the selector is behind ENABLE_SMART_TESTS off-by-default; the enforced gate
+  # is the full suite). FAIL-LOUD: hard-errors (exit 1) if base/selector/adjacency
+  # cannot resolve; never a green skip.
+  - repo: local
+    hooks:
+      - id: prepush-smart-tests
+        name: Governed impacted-test selector (pre-push, OMN-13973)
+        entry: bash scripts/hooks/prepush_smart_tests.sh
+        language: system
+        pass_filenames: false
+        always_run: true
+        verbose: true
+        stages: [pre-push]
 # Configuration
 # OMN-14667 (DRIFT-2a fix): every stage a hook uses MUST be installed by
 # `pre-commit install`. Previously [pre-commit, pre-push] only, so the
diff --git a/scripts/hooks/prepush_smart_tests.sh b/scripts/hooks/prepush_smart_tests.sh
new file mode 100755
index 0000000000..8dc905a632
--- /dev/null
+++ b/scripts/hooks/prepush_smart_tests.sh
@@ -0,0 +1,189 @@
+#!/usr/bin/env bash
+# SPDX-FileCopyrightText: 2025 OmniNode.ai Inc.
+# SPDX-License-Identifier: MIT
+#
+# Pre-push governed impacted-test selector (OMN-13973 / WS7 OMN-14655 fan-out).
+#
+# Runs the FAST LOCAL IMPACTED SUBSET of the unit suite once per `git push`,
+# using the SAME governed selector CI uses -- scripts/ci/detect_test_paths.py +
+# scripts/ci/test_selection_adjacency.yaml -- NOT a hand-typed `-k`. The selector
+# is fail-closed: it escalates to the full unit suite whenever it cannot prove
+# narrowing is safe (a shared module -- models/enums/runtime/errors/nodes/topics --
+# a test-infrastructure change (pyproject.toml, tests/conftest.py, tests/fixtures/,
+# tests/helpers/, pytest.ini), a >=6-module change, or the main branch). See root
+# CLAUDE.md Rule #4.
+#
+# This hook is deliberately NOT byte-parity with an enforced CI context. On CI the
+# selector is gated behind ENABLE_SMART_TESTS (off by default during rollout) and
+# the enforced merge gate is the FULL suite. This hook is *net-new, fast local
+# impacted-subset enforcement* -- a fast local mirror that is ADVISORY of the full
+# CI suite, run before the push leaves the machine. It retires the "run the whole
+# unit suite by hand before every push" default (CLAUDE.md Rule #4: "until
+# OMN-13973 lands, the full local suite remains the fail-closed default").
+#
+# PER-REPO SEAM-MATCH (this is an adaptation of the omnibase_core#1451 canary,
+# NOT a paste):
+#   * omnibase_infra's scripts/ci/detect_test_paths.py hardcodes
+#     SRC_PREFIX = "src/omnibase_infra/" and its own adjacency map; the selector
+#     is invoked with the SAME flags CI uses (.github/workflows/ci.yml).
+#   * infra's detect_test_paths.py main() does NOT accept a `--base-ref` argument
+#     (core's does), and infra CI does not pass one either. So this wrapper
+#     computes the merge-base locally for `git diff` but MUST NOT forward
+#     `--base-ref` to the selector -- doing so would make the selector argparse
+#     hard-error on every push. DRY parity is with infra's OWN CI invocation.
+#   * The full-suite escalation runs the full UNIT suite (tests/unit/), not all of
+#     tests/. Infra's tests/integration, tests/chaos, tests/replay and
+#     tests/performance need a live runtime (Docker/Postgres/Kafka) and stay a
+#     CI-only concern; the pre-push subset is unit-scoped by design.
+#
+# FAIL-LOUD (CLAUDE.md Rule #8): if the diff base, the selector, or its adjacency
+# config cannot resolve, this hook HARD-ERRORS with a remediation message and a
+# non-zero exit. It never degrades to a green skip -- a gate that cannot run must
+# be indistinguishable from a failing gate. (Verified by the landed
+# precommit-fail-loud-meta-gate, which scans this script.)
+#
+# Env overrides (all optional):
+#   PREPUSH_BASE_REF     git ref to diff against            (default: origin/dev)
+#   PREPUSH_ADJACENCY    adjacency yaml path            (default: selector built-in)
+#   PREPUSH_PYTEST_ARGS  extra args appended to the pytest invocation
+#   ENABLE_SMART_TESTS   set false/0/off to force the FULL suite (parity with the
+#                        CI var name); default here is smart selection ON, because
+#                        the whole point of the local hook is the impacted subset.
+#   PREPUSH_FULL_SUITE   set non-empty to force the FULL suite.
+
+set -euo pipefail
+
+log() { printf '[prepush-smart-tests] %s\n' "$1" >&2; }
+die() {
+  log "ERROR: $1"
+  log "REMEDIATION: $2"
+  exit 1
+}
+
+REPO_ROOT="$(git rev-parse --show-toplevel 2>/dev/null)" \
+  || die "not inside a git worktree" \
+         "run 'git push' from within the omnibase_infra repository"
+cd "$REPO_ROOT"
+
+BASE_REF="${PREPUSH_BASE_REF:-origin/dev}"
+
+# Deterministic diff base: fetch the base ref best-effort so an online push gets
+# an up-to-date merge-base, then REQUIRE it to resolve. Offline is tolerated ONLY
+# when the ref already exists locally; an entirely unresolvable base HARD-ERRORS
+# rather than silently diffing against nothing.
+git fetch --quiet origin "${BASE_REF#origin/}" 2>/dev/null || true
+if ! git rev-parse --verify --quiet "${BASE_REF}^{commit}" >/dev/null; then
+  die "base ref '${BASE_REF}' could not be resolved" \
+      "fetch it ('git fetch origin ${BASE_REF#origin/}') or set PREPUSH_BASE_REF to a resolvable ref"
+fi
+
+BASE_SHA="$(git merge-base "${BASE_REF}" HEAD 2>/dev/null)" \
+  || die "no common ancestor between '${BASE_REF}' and HEAD" \
+         "rebase your branch onto ${BASE_REF} so a merge-base exists"
+
+BRANCH="$(git rev-parse --abbrev-ref HEAD 2>/dev/null || echo HEAD)"
+
+CHANGED_FILE="$(mktemp)"
+SELECTION_FILE="$(mktemp)"
+SELECTION_ERR="$(mktemp)"
+trap 'rm -f "$CHANGED_FILE" "$SELECTION_FILE" "$SELECTION_ERR"' EXIT
+
+git diff --name-only "${BASE_SHA}" HEAD > "$CHANGED_FILE"
+
+# Feature-flag: default ON (impacted subset). Honor the CI var name and an
+# explicit full-suite override. Neither knob is a silent bypass -- forcing OFF
+# runs MORE tests (the whole suite), never fewer.
+FLAG="on"
+case "${ENABLE_SMART_TESTS:-}" in
+  false | False | FALSE | 0 | off | OFF) FLAG="off" ;;
+esac
+if [ -n "${PREPUSH_FULL_SUITE:-}" ]; then
+  FLAG="off"
+fi
+
+# DRY: invoke the EXACT module CI runs (scripts.ci.detect_test_paths) with the
+# SAME flags .github/workflows/ci.yml passes -- crucially WITHOUT `--base-ref`,
+# which infra's selector does not accept. Split on the optional adjacency
+# override to avoid empty-array expansion under `set -u` on bash 3.2 (macOS
+# system bash).
+run_selector() {
+  if [ -n "${PREPUSH_ADJACENCY:-}" ]; then
+    uv run python -m scripts.ci.detect_test_paths \
+      --changed-files-from "$CHANGED_FILE" \
+      --ref-name "$BRANCH" \
+      --event-name pull_request \
+      --feature-flag "$FLAG" \
+      --adjacency "$PREPUSH_ADJACENCY"
+  else
+    uv run python -m scripts.ci.detect_test_paths \
+      --changed-files-from "$CHANGED_FILE" \
+      --ref-name "$BRANCH" \
+      --event-name pull_request \
+      --feature-flag "$FLAG"
+  fi
+}
+
+if ! run_selector > "$SELECTION_FILE" 2> "$SELECTION_ERR"; then
+  log "selector stderr follows:"
+  cat "$SELECTION_ERR" >&2 || true
+  die "governed test selector failed to resolve a selection" \
+      "verify scripts/ci/detect_test_paths.py + scripts/ci/test_selection_adjacency.yaml resolve under 'uv run' in this worktree"
+fi
+
+# Parse the selection with stdlib json -- fail loud on any parse error.
+read_sel() {
+  python3 - "$SELECTION_FILE" "$1" << 'PY'
+import json
+import sys
+
+with open(sys.argv[1]) as fh:
+    data = json.load(fh)
+val = data[sys.argv[2]]
+if isinstance(val, list):
+    print("\n".join(val))
+else:
+    print(val)
+PY
+}
+
+IS_FULL="$(read_sel is_full_suite)" \
+  || die "could not parse selector output (is_full_suite)" \
+         "the selector emitted non-JSON; inspect $SELECTION_FILE"
+REASON="$(read_sel full_suite_reason 2> /dev/null || true)"
+
+PATHS=()
+PATHS_STR=""
+while IFS= read -r p; do
+  if [ -n "$p" ]; then
+    PATHS+=("$p")
+    PATHS_STR="${PATHS_STR}${p} "
+  fi
+done < <(read_sel selected_paths)
+
+log "selection: is_full_suite=${IS_FULL} reason=${REASON:-none} paths=[ ${PATHS_STR}] (feature-flag=${FLAG})"
+
+# Assemble the pytest target set. tests/integration is always ignored -- it needs
+# real services and stays a CI-only concern. On a fail-closed escalation we run
+# the full UNIT suite (tests/unit/), NOT all of tests/, so the pre-push hook stays
+# unit-scoped and service-free (infra seam-match).
+RC=0
+if [ "$IS_FULL" = "True" ] || [ "$IS_FULL" = "true" ]; then
+  log "running FULL unit suite (fail-closed escalation): uv run pytest tests/unit/ --ignore=tests/integration ${PREPUSH_PYTEST_ARGS:-}"
+  # shellcheck disable=SC2086
+  uv run pytest tests/unit/ --ignore=tests/integration --tb=short ${PREPUSH_PYTEST_ARGS:-} || RC=$?
+elif [ "${#PATHS[@]}" -gt 0 ]; then
+  log "running impacted subset: uv run pytest ${PATHS_STR}--ignore=tests/integration ${PREPUSH_PYTEST_ARGS:-}"
+  # shellcheck disable=SC2086
+  uv run pytest "${PATHS[@]}" --ignore=tests/integration --tb=short ${PREPUSH_PYTEST_ARGS:-} || RC=$?
+else
+  log "no impacted unit tests mapped for this push (no source/test change contributed a target); nothing to run."
+fi
+
+if [ "$RC" -ne 0 ]; then
+  log "ERROR: impacted tests failed (pytest exit ${RC})"
+  log "REMEDIATION: fix the failing tests, then re-push. Reproduce with: uv run pytest ${PATHS_STR:-tests/unit/} --ignore=tests/integration"
+  exit "$RC"
+fi
+
+log "impacted tests passed; allowing push."
+exit "$RC"