diff --git a/agentkit/skills/.shared/scripts/agent-run.sh b/agentkit/skills/.shared/scripts/agent-run.sh
index d5324d94..10dc4045 100755
--- a/agentkit/skills/.shared/scripts/agent-run.sh
+++ b/agentkit/skills/.shared/scripts/agent-run.sh
@@ -1576,16 +1576,16 @@ report_failure() {
 }
 
 # ---------------------------------------------------------------- verification cache ---
+verification_command_name() {
+    case ${cmd_name:-} in test|lint|typecheck|coverage|verify|check|*-test|*-lint|*-typecheck|*-check) return 0 ;; *) return 1 ;; esac
+}
 verification_cache_eligible() {
     verification_ineligible_reason=''
     [[ $cmd_declared == yes ]] || { verification_ineligible_reason='not-declared'; return 1; }
     [[ $verification_mode == local ]] || { verification_ineligible_reason='mode-not-local'; return 1; }
     [[ -n $verification_tools ]] || { verification_ineligible_reason='no-toolchain'; return 1; }
     [[ -z $baseline_ref ]] || { verification_ineligible_reason='baseline-run'; return 1; }
-    case ${cmd_name:-} in
-        test|lint|typecheck|coverage|verify|check|*-test|*-lint|*-typecheck|*-check) return 0 ;;
-        *) verification_ineligible_reason='name-not-verification'; return 1 ;;
-    esac
+    verification_command_name || { verification_ineligible_reason='name-not-verification'; return 1; }
 }
 
 hash_untracked_files() {
@@ -1925,7 +1925,12 @@ printf '  if this call returns before "=== agent-run exited", the run is still g
 readonly LOG_HEADER_LINES=2
 log_head=none log_clean=no
 [[ -z $git_top ]] || log_head=$(git -C "$git_top" rev-parse --verify -q HEAD 2> /dev/null) || log_head=none
-[[ -z $git_top || -n $(git -C "$git_top" status --porcelain --untracked-files=no 2> /dev/null || printf x) ]] || log_clean=yes
+git_worktree_status() {
+    git -C "$git_top" status --porcelain --untracked-files=normal 2> /dev/null
+}
+if [[ -n $git_top ]] && log_status=$(git_worktree_status); then
+    [[ -n $log_status ]] || log_clean=yes
+fi
 {
     printf '=== agent-run %s\n' "$cmd_str"
     printf '=== started %s  pid=%s  process-start=%s  epoch=%s  cwd=%s  concurrent-suites=%s  head=%s  tracked-clean=%s\n' \
@@ -1987,6 +1992,15 @@ fi
 if ((rc != 0)) && compose_dependency_start_collision "$log_file"; then
     printf '=== finding environment-retry-eligible: compose dependency-start collision (not a code regression)\n' >> "$log_file"
 fi
+if ((rc == 0)) && [[ $log_clean == yes ]] && verification_command_name; then
+    if ! log_status=$(git_worktree_status); then
+        rc=1 baseline_excluded=no
+        printf '=== finding checkout-dirty: checkout status unavailable after the command\n' >> "$log_file"
+    elif [[ -n $log_status ]]; then
+        rc=1 baseline_excluded=no
+        printf '=== finding checkout-dirty: checkout became dirty after the command\n' >> "$log_file"
+    fi
+fi
 printf '=== agent-run exited rc=%s after %ss\n' "$rc" "$elapsed" >> "$log_file"
 receipt_failure=no
 if ! publish_log_sha256_receipt; then
diff --git a/agentkit/skills/review-remote-pr/scripts/finding-ledger.sh b/agentkit/skills/review-remote-pr/scripts/finding-ledger.sh
index 1856ef16..fc750c08 100755
--- a/agentkit/skills/review-remote-pr/scripts/finding-ledger.sh
+++ b/agentkit/skills/review-remote-pr/scripts/finding-ledger.sh
@@ -443,6 +443,14 @@ resolve_commit() {
     git -C "$1" rev-parse --verify -q "$2^{commit}" 2>/dev/null || die_evidence "not a commit in $1: $2"
 }
 
+require_clean_checkout() {
+    local status
+    status=$(git -C "$1" status --porcelain --untracked-files=normal 2>/dev/null) ||
+        die_evidence 'could not inspect checkout status; evidence unavailable'
+    [[ -z $status ]] ||
+        die_evidence 'checkout has staged, unstaged, or untracked changes; commit or remove them before evidence'
+}
+
 require_tested_head() {
     local log=$1 current=$2 header tested clean
     header=$(sed -n '2p' "$log")
@@ -455,7 +463,7 @@ require_tested_head() {
     [[ $tested == "$current" ]] ||
         die_evidence "verification log tested $tested, not the current head $current"
     [[ $clean == yes ]] ||
-        die_evidence 'verification log ran with uncommitted tracked changes; commit the repair, then run agent-run.sh --cmd test'
+        die_evidence 'verification log began with staged, unstaged, or untracked changes; clean the checkout, then run agent-run.sh --cmd test'
 }
 
 # Emit fixed-verdict evidence for one finding, refusing anything add would
@@ -486,6 +494,7 @@ cmd_evidence() {
         repair_sha=$(resolve_commit "$root" "$repair_sha") || exit 1
     [[ $head == "$actual_head" ]] ||
         die_evidence "evidence head $head is not the current head $actual_head"
+    require_clean_checkout "$root"
     command=$(sed -n '1s/^=== agent-run //p' "$log")
     declared=$("$SCRIPT_DIR/../../.shared/scripts/repo-config.sh" --repo-root "$root" \
         --get-argv AGENT_CMD_TEST | tr '\0' ' ') || die_evidence 'the repository declares no AGENT_CMD_TEST'
diff --git a/tests/lint-helper-size.sh b/tests/lint-helper-size.sh
index 8f07f61e..5d2fbe81 100755
--- a/tests/lint-helper-size.sh
+++ b/tests/lint-helper-size.sh
@@ -29,7 +29,8 @@ declare -A KNOWN_OVERSIZE=(
     # #731/#732/#776/#809/#874/PR #877: yielded-run status and lease lifecycle.
     # #873: bind repair evidence to the clean committed head tested before push.
     # #874 review repair: stable process identity and canonical fallback boundaries.
-    [skills/.shared/scripts/agent-run.sh]="2017:21859:800"
+    # #873 PR repair: fail closed when a clean-start verification dirties its checkout.
+    [skills/.shared/scripts/agent-run.sh]="2031:22008:800"
     # #865: scope the generated regeneration hint to plugin-backed onboarding.
     [skills/.shared/scripts/bootstrap-repo.sh]="818:10363:800"
     # #777: repository-facts recipe moved from injected prose into --help.
@@ -196,7 +197,8 @@ readonly MAX_HELPER_TOKENS=10000
 # #873 PR repair: bind evidence overrides to the checkout's actual HEAD.
 # #873 evidence repair + #874/#875 merge: exact combined helper tree measurement.
 # #873/#874 + #875 + #876 provider-alias repair: exact combined helper tree measurement.
-readonly MAX_TREE_TOKENS=477181
+# #873 PR repair: verification-scoped post-run cleanliness and setup compatibility.
+readonly MAX_TREE_TOKENS=477429
 
 violations=0
 checked=0
diff --git a/tests/test-agent-run-cmd.sh b/tests/test-agent-run-cmd.sh
index 3e979c0b..9074f130 100755
--- a/tests/test-agent-run-cmd.sh
+++ b/tests/test-agent-run-cmd.sh
@@ -401,22 +401,80 @@ assert_contains "$out" 'resume this same call; never relaunch' \
 # tested. The header records HEAD and tracked-tree cleanliness so a stale or
 # dirty log cannot certify the branch tip that was pushed.
 bound_repo=$(make_repo)
-printf 'AGENT_CMD_OK=echo hello\n' >"$bound_repo/.agent/config.env"
+printf 'AGENT_CMD_OK=echo hello\nAGENT_CMD_SETUP=./dirty-setup.sh\nAGENT_CMD_DIRTY_TEST=./dirty-tracked.sh\nAGENT_CMD_DIRTY_CHECK=./dirty-untracked.sh\n' \
+    >"$bound_repo/.agent/config.env"
 printf '.agent/\n' >"$bound_repo/.gitignore"
 printf 'a\n' >"$bound_repo/tracked.txt"
-git -C "$bound_repo" add .gitignore tracked.txt
+printf '#!/bin/sh\nprintf "changed\\n" >tracked.txt\n' >"$bound_repo/dirty-tracked.sh"
+printf '#!/bin/sh\nprintf "generated\\n" >verification-input.txt\n' >"$bound_repo/dirty-untracked.sh"
+printf '#!/bin/sh\nprintf "configured\\n" >setup-output.txt\n' >"$bound_repo/dirty-setup.sh"
+chmod +x "$bound_repo/dirty-tracked.sh" "$bound_repo/dirty-untracked.sh" "$bound_repo/dirty-setup.sh"
+git -C "$bound_repo" add .gitignore tracked.txt dirty-tracked.sh dirty-untracked.sh dirty-setup.sh
 git -C "$bound_repo" -c user.name=Test -c user.email=test@example.invalid commit -qm init
 bound_sha=$(git -C "$bound_repo" rev-parse HEAD)
 (cd "$bound_repo" && "$real_run_sh" --cmd ok >/dev/null 2>&1)
 log=$(cat "$bound_repo"/.agent/logs/*-ok.log)
 assert_contains "$log" "head=$bound_sha  tracked-clean=yes" \
     'the log header binds a clean run to its committed head'
+printf 'input\n' >"$bound_repo/untracked-test.conf"
+rm -f -- "$bound_repo"/.agent/logs/*-ok.log*
+untracked_dev_rc=0
+(cd "$bound_repo" && "$real_run_sh" --cmd ok >/dev/null 2>&1) || untracked_dev_rc=$?
+log=$(cat "$bound_repo"/.agent/logs/*-ok.log)
+assert_eq 0 "$untracked_dev_rc" 'an ordinary command keeps its native status in a dirty development tree'
+assert_contains "$log" "head=$bound_sha  tracked-clean=no" \
+    'a nonignored untracked verification input makes the run non-certifiable'
+rm "$bound_repo/untracked-test.conf"
+status_bin="$tmp/status-bin"
+mkdir "$status_bin"
+cat >"$status_bin/git" <<'EOF'
+#!/bin/sh
+for arg do
+    [ "$arg" != status ] || exit 7
+done
+exec "$AGENTKIT_REAL_GIT" "$@"
+EOF
+chmod +x "$status_bin/git"
+rm -f -- "$bound_repo"/.agent/logs/*-ok.log*
+status_dev_rc=0
+(cd "$bound_repo" && PATH="$status_bin:$PATH" AGENTKIT_REAL_GIT=$(command -v git) \
+    "$real_run_sh" --cmd ok >/dev/null 2>&1) || status_dev_rc=$?
+log=$(cat "$bound_repo"/.agent/logs/*-ok.log)
+assert_eq 0 "$status_dev_rc" 'a status-read error does not block an ordinary development command'
+assert_contains "$log" "head=$bound_sha  tracked-clean=no" \
+    'a status-read error fails closed instead of certifying an empty clean status'
 printf 'b\n' >"$bound_repo/tracked.txt"
 rm -f -- "$bound_repo"/.agent/logs/*-ok.log*
-(cd "$bound_repo" && "$real_run_sh" --cmd ok >/dev/null 2>&1)
+dirty_dev_rc=0
+(cd "$bound_repo" && "$real_run_sh" --cmd ok >/dev/null 2>&1) || dirty_dev_rc=$?
 log=$(cat "$bound_repo"/.agent/logs/*-ok.log)
+assert_eq 0 "$dirty_dev_rc" 'preexisting tracked dirt does not change an ordinary command status'
 assert_contains "$log" "head=$bound_sha  tracked-clean=no" \
     'the log header records uncommitted tracked changes'
+git -C "$bound_repo" checkout -q -- tracked.txt
+rm -f -- "$bound_repo"/.agent/logs/*-setup.log*
+setup_rc=0
+(cd "$bound_repo" && "$real_run_sh" --cmd setup >/dev/null 2>&1) || setup_rc=$?
+assert_eq 0 "$setup_rc" 'a setup command keeps its native success after creating an untracked output'
+rm -f -- "$bound_repo/setup-output.txt"
+rm -f -- "$bound_repo"/.agent/logs/*-dirty-test.log*
+dirty_tracked_rc=0
+(cd "$bound_repo" && "$real_run_sh" --cmd dirty-test >/dev/null 2>&1) || dirty_tracked_rc=$?
+dirty_tracked_log=$(cat "$bound_repo"/.agent/logs/*-dirty-test.log)
+assert_eq 1 "$dirty_tracked_rc" 'a clean-start command cannot pass after dirtying a tracked file'
+assert_contains "$dirty_tracked_log" 'checkout became dirty after the command' \
+    'the tracked post-run refusal names the reproducibility failure'
+assert_contains "$dirty_tracked_log" '=== agent-run exited rc=1' \
+    'a tracked post-run change cannot leave a green terminal marker'
+git -C "$bound_repo" checkout -q -- tracked.txt
+rm -f -- "$bound_repo"/.agent/logs/*-dirty-check.log*
+dirty_untracked_rc=0
+(cd "$bound_repo" && "$real_run_sh" --cmd dirty-check >/dev/null 2>&1) || dirty_untracked_rc=$?
+dirty_untracked_log=$(cat "$bound_repo"/.agent/logs/*-dirty-check.log)
+assert_eq 1 "$dirty_untracked_rc" 'a clean-start command cannot pass after creating nonignored untracked input'
+assert_contains "$dirty_untracked_log" 'checkout became dirty after the command' \
+    'the untracked post-run refusal names the reproducibility failure'
+rm "$bound_repo/verification-input.txt"
 
 # The suppressed-line count must report the command output, not the markers.
 assert_contains "$out" '(1 lines suppressed' 'the line count excludes the log bookkeeping'
@@ -772,7 +830,7 @@ assert_contains "$out" 'declared-test-ran' \
 # runner-resolved link; finding 2 carries --force into build_chain_argv. Both
 # were offset by further comment trims elsewhere, holding the line count at 1627.
 # #612 adds paired formatter resolution and bounded cargo failure summaries.
-assert_eq yes "$([[ $(wc -l < "$root/agentkit/skills/.shared/scripts/agent-run.sh") -le 2017 ]] && printf yes || printf no)" \
-    'agent-run.sh stays at or under 2017 lines (#873 metadata + #874 review repair)'
+assert_eq yes "$([[ $(wc -l < "$root/agentkit/skills/.shared/scripts/agent-run.sh") -le 2031 ]] && printf yes || printf no)" \
+    'agent-run.sh stays at or under 2031 lines (#873 evidence cleanliness)'
 
 finish
diff --git a/tests/test-finding-ledger.sh b/tests/test-finding-ledger.sh
index ee7a6916..0b35d1d0 100755
--- a/tests/test-finding-ledger.sh
+++ b/tests/test-finding-ledger.sh
@@ -7,6 +7,16 @@ here=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
 root=$(dirname -- "$here")
 source "$here/lib/assert.sh"
 
+fixture_digest() {
+    if command -v sha256sum >/dev/null 2>&1; then
+        sha256sum -- "$1"
+    elif command -v shasum >/dev/null 2>&1; then
+        shasum -a 256 -- "$1"
+    else
+        return 1
+    fi
+}
+
 script="$root/agentkit/skills/review-remote-pr/scripts/finding-ledger.sh"
 tmp=$(mktemp -d)
 trap 'rm -rf -- "$tmp"' EXIT
@@ -198,7 +208,7 @@ printf 'repaired\n' >"$repair_repo/affected.sh"
 git -C "$repair_repo" commit -qam repair
 repair_sha=$(git -C "$repair_repo" rev-parse HEAD)
 printf '=== agent-run tests/regression.sh\n=== agent-run exited rc=0 after 1s\n' >"$tmp/verification.log"
-log_hash=$(sha256sum "$tmp/verification.log"); log_hash=${log_hash%% *}
+log_hash=$(fixture_digest "$tmp/verification.log"); log_hash=${log_hash%% *}
 for n in {1..8}; do
     jq -n --arg finding "confirmed-$n" --arg sha "$repair_sha" --arg log "$tmp/verification.log" --arg digest "$log_hash" \
         '{finding:$finding,repairSha:$sha,head:$sha,path:"affected.sh",command:"tests/regression.sh",status:"passed",log:$log,logSha256:$digest}' >"$tmp/repair.json"
@@ -222,6 +232,9 @@ for tool in bash dirname jq git grep tail; do
     ln -s "$(command -v "$tool")" "$portable_bin/$tool"
 done
 ln -s "$(command -v shasum)" "$portable_bin/shasum"
+portable_fixture_digest=$(PATH="$portable_bin" fixture_digest "$tmp/verification.log")
+assert_eq "$log_hash" "${portable_fixture_digest%% *}" \
+    'test fixture hashing supports shasum without GNU sha256sum'
 portable_rc=0
 portable_out=$(PATH="$portable_bin" "$script" status --file "$open_run/findings.ndjson" \
     --repo-root "$repair_repo" --head "$repair_sha" 2>&1) || portable_rc=$?
@@ -358,6 +371,40 @@ assert_eq "$ev_repair" "$(jq -r .repairSha <<<"$ev_out")" 'evidence records the
 assert_eq "$ev_head" "$(jq -r .head <<<"$ev_out")" 'evidence head defaults to the checkout HEAD'
 assert_eq 'tests/regression.sh' "$(jq -r .command <<<"$ev_out")" 'evidence records the logged command'
 assert_eq false "$(jq 'has("reviewedHead")' <<<"$ev_out")" 'evidence carries no reviewedHead'
+printf 'dirty\n' >>"$ev_repo/other.txt"
+dirty_checkout_rc=0
+evidence --log "$tmp/ev-full.log" --repair-sha "$ev_repair" \
+    >/dev/null 2>"$tmp/ev-dirty-checkout.err" || dirty_checkout_rc=$?
+assert_eq 1 "$dirty_checkout_rc" 'evidence refuses current tracked checkout changes'
+assert_contains "$(cat "$tmp/ev-dirty-checkout.err")" 'checkout has staged, unstaged, or untracked changes' \
+    'the current tracked-dirt refusal names every unsupported change class'
+git -C "$ev_repo" checkout -q -- other.txt
+printf 'input\n' >"$ev_repo/untracked-test.conf"
+untracked_checkout_rc=0
+evidence --log "$tmp/ev-full.log" --repair-sha "$ev_repair" \
+    >/dev/null 2>"$tmp/ev-untracked-checkout.err" || untracked_checkout_rc=$?
+assert_eq 1 "$untracked_checkout_rc" 'evidence refuses current nonignored untracked inputs'
+assert_contains "$(cat "$tmp/ev-untracked-checkout.err")" 'checkout has staged, unstaged, or untracked changes' \
+    'the current untracked refusal uses the same fail-closed boundary'
+rm "$ev_repo/untracked-test.conf"
+status_bin="$tmp/evidence-status-bin"
+mkdir "$status_bin"
+cat >"$status_bin/git" <<'EOF'
+#!/bin/sh
+for arg do
+    [ "$arg" != status ] || exit 7
+done
+exec "$AGENTKIT_REAL_GIT" "$@"
+EOF
+chmod +x "$status_bin/git"
+status_error_rc=0
+PATH="$status_bin:$PATH" AGENTKIT_REAL_GIT=$(command -v git) \
+    "$script" evidence --title 'Guard input' --path affected.sh --repo-root "$ev_repo" \
+    --log "$tmp/ev-full.log" --repair-sha "$ev_repair" \
+    >/dev/null 2>"$tmp/ev-status-error.err" || status_error_rc=$?
+assert_eq 1 "$status_error_rc" 'evidence fails closed when checkout status is unavailable'
+assert_contains "$(cat "$tmp/ev-status-error.err")" 'could not inspect checkout status' \
+    'the status error is not mistaken for an empty clean checkout'
 printf '%s\n' "$ev_out" >"$tmp/ev.json"
 ev_run="$tmp/ev-run"
 mkdir -m 700 "$ev_run"
@@ -400,8 +447,8 @@ other_head_err=$(evidence --log "$tmp/ev-other-head.log" --repair-sha "$ev_repai
 assert_contains "$other_head_err" "tested $ev_repair, not the current head $ev_head" \
     'the stale-log refusal names both the tested and current heads'
 dirty_err=$(evidence --log "$tmp/ev-dirty.log" --repair-sha "$ev_repair" 2>&1 >/dev/null || true)
-assert_contains "$dirty_err" 'uncommitted tracked changes' \
-    'the dirty-log refusal tells the worker to commit before full verification'
+assert_contains "$dirty_err" 'staged, unstaged, or untracked changes' \
+    'the dirty-log refusal names every change class that prevents reproducible verification'
 unbound_err=$(evidence --log "$tmp/ev-unbound.log" --repair-sha "$ev_repair" 2>&1 >/dev/null || true)
 assert_contains "$unbound_err" 'no tested-head metadata' \
     'the unbound-log refusal asks for a current agent-run log'
@@ -451,7 +498,7 @@ fi
 
 # Validation remains backward-compatible with records produced before the
 # tested-head header existed. Only evidence creation requires the new binding.
-legacy_digest=$(sha256sum "$tmp/ev-unbound.log"); legacy_digest=${legacy_digest%% *}
+legacy_digest=$(fixture_digest "$tmp/ev-unbound.log"); legacy_digest=${legacy_digest%% *}
 jq -c --arg log "$tmp/ev-unbound.log" --arg digest "$legacy_digest" \
     '.evidence.log=$log | .evidence.logSha256=$digest' "$ev_run/findings.ndjson" >"$tmp/legacy-repair.ndjson"
 assert_eq complete "$("$script" status --file "$tmp/legacy-repair.ndjson" --repo-root "$ev_repo" \