diff --git a/adoption/credential-inventory.json b/adoption/credential-inventory.json
index 88ad7c968..9e28caf23 100644
--- a/adoption/credential-inventory.json
+++ b/adoption/credential-inventory.json
@@ -1,6 +1,6 @@
 {
   "schema_version": 1,
-  "as_of": "2026-09-27",
+  "as_of": "2026-09-29",
   "decision": "docs/decisions/2026-09-24-secret-storage.md",
   "runbook": "docs/secret-storage.md",
   "checker": "scripts/credential_status.py",
@@ -42,6 +42,38 @@
       "rotation": "On any exposure trigger; before any live-scope work; unconditionally once after adopting this layout because broker-prefixed names were observed in a launcher environment on 2026-09-23.",
       "notes": "Paper-only keys. Live keys are out of scope for this repository; live trading is handled outside it. ALPACA_API_KEY/ALPACA_SECRET_KEY are read-only fallback names in pit-availability/measure.py and are never written."
     },
+    {
+      "id": "alpaca-paper-2",
+      "label": "Alpaca paper broker key pair, second paper account",
+      "class": "broker_api_key_pair",
+      "status": "optional",
+      "lane": "us-equities-paper",
+      "store": {
+        "kind": "private_env_file",
+        "path_template": "${XDG_CONFIG_HOME:-$HOME/.config}/native-agent-stack/alpaca-paper-2.env"
+      },
+      "variables": ["APCA_API_KEY_ID", "APCA_API_SECRET_KEY"],
+      "optional_variables": ["APCA_API_BASE_URL"],
+      "pointer_variables": ["PAPER_ENV_FILE_2"],
+      "loaders": [
+        "blueprints/us-equities/adaptive-paper/runner.py#credentials",
+        "blueprints/us-equities/adaptive-paper/market_research.py#credentials",
+        "blueprints/us-equities/broad-universe/collect_daily.py#read_credentials",
+        "blueprints/us-equities/mover-early-entry/collect.py#credentials",
+        "blueprints/us-equities/extreme-gainer-audit/audit.py#credentials",
+        "blueprints/us-equities/incentive-monitor/monitor.py#credentials"
+      ],
+      "environment_only_consumers": [
+        "blueprints/us-equities/alpaca-paper/paper_runner.py",
+        "blueprints/us-equities/alpaca-historical/collect.py",
+        "blueprints/us-equities/security-identity/probe.py",
+        "blueprints/us-equities/security-identity/quality.py",
+        "blueprints/us-equities/delisting-coverage/collect.py",
+        "blueprints/us-equities/alpaca-history-fixture/fixture.py"
+      ],
+      "rotation": "On any exposure trigger; before any live-scope work. Regenerate at Alpaca, then run tools/credentials/open_credential_terminal.sh alpaca-paper-2 and type replace at the hidden prompt.",
+      "notes": "Paper-only keys for a second Alpaca paper account, assigned to the isolated incentive-monitor forward study. The file already exists on a host that runs it; this entry names it and no tool here writes it unless the operator asks. PAPER_ENV_FILE_2 is its pointer, and scripts/hooks/secret_path_guard.py covers it (tests/test_secret_path_guard.py ties every inventory pointer to the guard). Kernel keyring copies, memory only and lost at a restart: alpaca-paper-2-id and alpaca-paper-2-secret. Live keys are out of scope for this repository."
+    },
     {
       "id": "sec-contact",
       "label": "SEC/EDGAR declared contact identity",
diff --git a/adoption/hooks/claude/SHA256SUMS b/adoption/hooks/claude/SHA256SUMS
index 429656956..f8dba92ea 100644
--- a/adoption/hooks/claude/SHA256SUMS
+++ b/adoption/hooks/claude/SHA256SUMS
@@ -1,5 +1,5 @@
 2a5f087f2c10437bab302e19469ae6b2e715828083a8bae07a7b177540b63e0e  effort-default-guard.py
-abf269ba41a126400e084b4f03828eb4f0e6fc2375633c0e788136158a3054b1  ../../../scripts/hooks/secret_path_guard.py
+f9be81b240762dc58da874f135040d182ca9fb5e9056ab9b8a977dd909453244  ../../../scripts/hooks/secret_path_guard.py
 d6c3c19d6e94d3f48d2788963c8c9be45ec57e6bb81cab92b2c30d9fd5c8e8d6  token-lanes-block.md
 c81a91c4ffb2fa906feb403d5a11bd294b6cf2db45795d80f9acd662c5004973  token-lanes-block.builder.md
 47cc80b262468557b8cfe5c243598030757270674bc7bf286fba8c0c573abc28  token-lanes-block.researcher.md
diff --git a/docs/secret-storage.md b/docs/secret-storage.md
index f01ac7cd8..81d5e3a2d 100644
--- a/docs/secret-storage.md
+++ b/docs/secret-storage.md
@@ -14,6 +14,7 @@ against it.
 | Inventory id | What it is | Status | Where it lives | Variable names |
 | --- | --- | --- | --- | --- |
 | `alpaca-paper` | Alpaca paper broker key pair | required now | `<store>/alpaca-paper.env` | `APCA_API_KEY_ID`, `APCA_API_SECRET_KEY` (optional, not secret: `APCA_API_BASE_URL`) |
+| `alpaca-paper-2` | Alpaca paper broker key pair, second paper account (isolated incentive-monitor study) | optional | `<store>/alpaca-paper-2.env`, pointer `PAPER_ENV_FILE_2` | `APCA_API_KEY_ID`, `APCA_API_SECRET_KEY` (optional, not secret: `APCA_API_BASE_URL`) |
 | `sec-contact` | SEC/EDGAR contact string. This is private personal data, not an auth secret | required now | `<store>/sec-contact.env` | `SEC_USER_AGENT` (optional: `EDGAR_IDENTITY`) |
 | `databento` | Databento API key | only when you buy it | `<store>/databento.env` | `DATABENTO_API_KEY` |
 | `typesafe` | Typesafe key, for the live-judge mode of `gap_crosswalk.py` only | only when you pay for it | `<store>/typesafe.env` | `TYPESAFE_API_KEY` |
@@ -84,6 +85,7 @@ Put the file paths, never the values, in your shell startup file once:
 # ~/.bashrc or ~/.zshrc: pointers only; no credential value is exported
 _nas_store="${XDG_CONFIG_HOME:-$HOME/.config}/native-agent-stack"
 export PAPER_ENV_FILE="$_nas_store/alpaca-paper.env"
+export PAPER_ENV_FILE_2="$_nas_store/alpaca-paper-2.env"   # second paper account, where this host holds one
 export SEC_CONTACT_ENV="$_nas_store/sec-contact.env"
 export PIT_ALPACA_ENV_PATH="$PAPER_ENV_FILE" PIT_SEC_ENV_PATH="$SEC_CONTACT_ENV"
 unset _nas_store
diff --git a/manifests/evidence.json b/manifests/evidence.json
index dd6d32c52..f4cbf47f9 100644
--- a/manifests/evidence.json
+++ b/manifests/evidence.json
@@ -3714,8 +3714,8 @@
     },
     {
       "path": "adoption/credential-inventory.json",
-      "sha256": "5e20ce0d08dd203b5b9d86ee2375cd03131a4c1f3c18b096bb48f66371bb6e1a",
-      "bytes": 17862
+      "sha256": "2404df6c8d17b8dea544f162d439ddf8a03a5f12f0c2799a63707c9f88e98e35",
+      "bytes": 20076
     },
     {
       "path": "adoption/hardware-profiles.json",
@@ -3724,7 +3724,7 @@
     },
     {
       "path": "adoption/hooks/claude/SHA256SUMS",
-      "sha256": "b611e824165ab4465bed6729054a1c1eaed75a7c0044506f508e4c6adacd62d4",
+      "sha256": "06385c800b70072e9163096f06e73874cfed63040cd9db87ae221d1cbd2aed62",
       "bytes": 861
     },
     {
@@ -14700,8 +14700,8 @@
     },
     {
       "path": "docs/secret-storage.md",
-      "sha256": "6d7a9d5e33efc186c2876daa5990713be7cc8e3f7491190de2022b4d952624f2",
-      "bytes": 82026
+      "sha256": "b02073ef9f01bd52a51886e2cac24ef555b23d7e7b4279a467199f91bd138ec7",
+      "bytes": 82401
     },
     {
       "path": "docs/stack.md",
@@ -42035,8 +42035,8 @@
     },
     {
       "path": "scripts/hooks/secret_path_guard.py",
-      "sha256": "abf269ba41a126400e084b4f03828eb4f0e6fc2375633c0e788136158a3054b1",
-      "bytes": 43178
+      "sha256": "f9be81b240762dc58da874f135040d182ca9fb5e9056ab9b8a977dd909453244",
+      "bytes": 43564
     },
     {
       "path": "scripts/host_receipts.py",
@@ -42545,8 +42545,8 @@
     },
     {
       "path": "tests/test_credential_status.py",
-      "sha256": "f1f3a7e431ebf092db8ed1ca121b80462aac950ec4280fb71c1b9a7ea0ccfca5",
-      "bytes": 27639
+      "sha256": "a2b96d0c75ffc67950544632562ff83f23d3d248c2800c34efd64f928e51b426",
+      "bytes": 28598
     },
     {
       "path": "tests/test_credential_tools.py",
@@ -42975,8 +42975,8 @@
     },
     {
       "path": "tests/test_secret_path_guard.py",
-      "sha256": "a46943e13beaf956f6c96c4623451f6d398e4d9f416d41be6d50507260b63ff8",
-      "bytes": 62922
+      "sha256": "767d26f16a70a9eb20a907fbe762126b9e2c132c8256e2ba19a6373cdb585e6c",
+      "bytes": 65660
     },
     {
       "path": "tests/test_security_identity.py",
diff --git a/scripts/hooks/secret_path_guard.py b/scripts/hooks/secret_path_guard.py
index 8f69279be..5a2a51fdb 100644
--- a/scripts/hooks/secret_path_guard.py
+++ b/scripts/hooks/secret_path_guard.py
@@ -90,8 +90,11 @@
 SECRET_NAME = re.compile(r"\b(?:" + _NAMES + r")\b")
 SECRET_EXPANSION = re.compile(r"\$\{?!?(?:" + _NAMES + r")\b")
 SECRET_LOOKUP = re.compile(r"(?:environ|getenv|process\.env|ENV\[)[^;\n]{0,40}\b(?:" + _NAMES + r")\b")
+# Every inventory `pointer_variables` name (tests/test_secret_path_guard.py checks each), with an optional numeric suffix: a
+# further paper account's pointer is PAPER_ENV_FILE_2. Without the suffix group the word boundary after PAPER_ENV_FILE failed
+# before `_2`, so a reader, a redirect or a `source` on "$PAPER_ENV_FILE_2" passed while the account-1 forms were blocked.
 POINTER_VARIABLE = re.compile(
-    r"\$\{?(?:PAPER_ENV_FILE|ENV_FILE|SEC_CONTACT_ENV|PIT_ALPACA_ENV_PATH|PIT_SEC_ENV_PATH|HF_TOKEN_PATH)\b")
+    r"\$\{?(?:PAPER_ENV_FILE|ENV_FILE|SEC_CONTACT_ENV|PIT_ALPACA_ENV_PATH|PIT_SEC_ENV_PATH|HF_TOKEN_PATH)(?:_[0-9]+)?\b")
 # The Hugging Face home itself (or everything in it) as a reader's operand: a recursive search or a
 # copy of it includes both token files. Its subdirectories such as hub/ stay readable.
 HF_HOME_ROOT = re.compile(r"(?:(?:\.cache|XDG_CACHE_HOME)\}?/huggingface\}?|^\$\{?HF_HOME\}?)(?:/\**)?$")
diff --git a/tests/test_credential_status.py b/tests/test_credential_status.py
index 075df0a4a..abd50a099 100644
--- a/tests/test_credential_status.py
+++ b/tests/test_credential_status.py
@@ -71,11 +71,23 @@ def run_cli(self, *args):
     def test_real_inventory_is_valid(self):
         self.assertEqual(cs.inventory_errors(self.inventory, ROOT), [])
         ids = {e["id"] for e in self.inventory["entries"]}
-        self.assertTrue({"alpaca-paper", "sec-contact", "claude-native", "codex-native", "gh-native",
+        self.assertTrue({"alpaca-paper", "alpaca-paper-2", "sec-contact", "claude-native", "codex-native", "gh-native",
                          "huggingface-native", "huggingface-native-stored"} <= ids)
         self.assertIn("HUGGING_FACE_HUB_TOKEN", self.inventory["must_not_be_set"])
         self.assertIn("HF_TOKEN", self.inventory["must_not_be_set"])
 
+    def test_second_paper_row_mirrors_the_first(self):
+        # alpaca-paper-2 names the second paper account's existing file: same class, lane, store kind and variables as
+        # account 1, its own file and its own pointer (2026-09-29), and neither row shares a pointer with the other.
+        rows = {e["id"]: e for e in self.inventory["entries"]}
+        first, second = rows["alpaca-paper"], rows["alpaca-paper-2"]
+        for key in ("class", "lane", "variables", "optional_variables"):
+            self.assertEqual(second[key], first[key], key)
+        self.assertEqual(second["store"]["kind"], first["store"]["kind"])
+        self.assertEqual(second["store"]["path_template"], first["store"]["path_template"].replace("alpaca-paper.env", "alpaca-paper-2.env"))
+        self.assertEqual(second["pointer_variables"], ["PAPER_ENV_FILE_2"])
+        self.assertFalse(set(second["pointer_variables"]) & set(first["pointer_variables"]))
+
     def test_inventory_rejects_non_home_template_and_bad_names(self):
         broken = copy.deepcopy(self.inventory)
         broken["entries"][0]["store"]["path_template"] = "/srv/shared/alpaca.env"
diff --git a/tests/test_secret_path_guard.py b/tests/test_secret_path_guard.py
index 5d34df2d4..bc947315e 100644
--- a/tests/test_secret_path_guard.py
+++ b/tests/test_secret_path_guard.py
@@ -94,6 +94,18 @@
     "ls ${XDG_CONFIG_HOME:-$HOME/.config}/native-agent-stack": "credential_store_path",
     "rg KEY \"$XDG_CONFIG_HOME/native-agent-stack/\"": "credential_store_path",
     "while read -r line; do :; done < \"$PAPER_ENV_FILE\"": "credential_file_read",
+    # A numbered pointer (PAPER_ENV_FILE_2 is the second paper account's, 2026-09-29): the word boundary after
+    # PAPER_ENV_FILE used to fail before `_2`, so each of these passed the guard (checked against the previous guard)
+    # while the account-1 form was blocked.
+    "cat \"$PAPER_ENV_FILE_2\"": "credential_file_read",
+    "cat \"${PAPER_ENV_FILE_2}\"": "credential_file_read",
+    "head -n 3 \"$PAPER_ENV_FILE_2\"": "credential_file_read",
+    "while read -r l; do :; done < \"$PAPER_ENV_FILE_2\"": "credential_file_read",
+    "cat \"$SEC_CONTACT_ENV_2\"": "credential_file_read",
+    "set -x; . \"$PAPER_ENV_FILE_2\"": "trace_while_sourcing",
+    "set -o xtrace; source \"${PAPER_ENV_FILE_2}\"": "trace_while_sourcing",
+    ". \"$PAPER_ENV_FILE_2\"; declare -p APCA_API_KEY_ID": "environment_dump_after_source",
+    "( . \"$PAPER_ENV_FILE_2\"; python3 -c 'import os; print(dict(os.environ))' )": "environment_dump_after_source",
     # Shell tracing or verbose mode while sourcing a credential file prints its assignments.
     "set -x; . \"$PAPER_ENV_FILE\"": "trace_while_sourcing",
     "set -euxo pipefail; set -a; . \"$SEC_CONTACT_ENV\"; set +a": "trace_while_sourcing",
@@ -462,6 +474,18 @@
     "wc -c \"$PAPER_ENV_FILE\"",
     "stat -c '%a %U' \"$PAPER_ENV_FILE\"",
     "( set -a; . \"$PAPER_ENV_FILE\"; set +a; exec python3 blueprints/us-equities/alpaca-paper/paper_runner.py --once )",
+    # The second paper account (2026-09-29): its pointer handed to a loader or a size check, as account 1's is.
+    "python3 runner.py preflight --env-file \"$PAPER_ENV_FILE_2\" --output out.json",
+    "python3 -I tools/credentials/alpaca_rate_limit_probe.py --env-file \"$PAPER_ENV_FILE_2\" --out rate-limit.json",
+    "wc -c \"$PAPER_ENV_FILE_2\"",
+    "stat -c '%a %U' \"$PAPER_ENV_FILE_2\"",
+    # The trading lane's loader path (2026-09-29): a unit started with systemd-run --user whose bash -ic hands the pointer to a
+    # loader as --env-file. It must keep passing for both accounts, so closing the numbered-pointer hole never blocks a unit.
+    "systemd-run --user --unit=overnight-volume-watch --collect /bin/bash -ic "
+    "'exec python3 blueprints/us-equities/adaptive-paper/runner.py run --env-file \"$PAPER_ENV_FILE\"'",
+    "systemd-run --user --unit=paper-series-2 --collect /bin/bash -ic "
+    "'exec python3 blueprints/us-equities/adaptive-paper/runner.py run --env-file \"$PAPER_ENV_FILE_2\"'",
+    "systemd-run --user --unit=x --collect /bin/bash -ic \"exec python3 X --env-file \\\"$PAPER_ENV_FILE_2\\\" --output out.json\"",
     # Hugging Face: hf reads its own store, so checking the sign-in, the operator's interactive
     # login, revision-pinned downloads and checksum verification never expose the token.
     "hf auth whoami",
@@ -697,6 +721,13 @@
 
 # Known heuristic gaps, asserted so a change that closes one is noticed.
 EXPECTED_PASS_THROUGH = [
+    # A pointer with a NON-numeric suffix is not recognised (only PAPER_ENV_FILE_<digits> is, 2026-09-29): a new pointer name
+    # goes into the inventory and POINTER_VARIABLE together, and test_inventory_pointer_variables_are_guarded enforces it.
+    "cat \"$PAPER_ENV_FILE_B\"",
+    # systemd-run is not a modelled launcher: a reader it starts is not inspected, for either account (found 2026-09-29 while
+    # adding the loader-path rows above); with --pipe --wait its output returns to the caller.
+    "systemd-run --user --pipe --wait cat \"$PAPER_ENV_FILE\"",
+    "systemd-run --user --pipe --wait /bin/bash -ic 'cat \"$PAPER_ENV_FILE_2\"'",
     "python3 -c \"import runner; print(runner.credentials(__import__('os').path.expandvars('$PAPER_ENV_FILE')))\"",
     "python3 -c 'import os;print(dict(os.environ))'",
     # huggingface_hub's own loader, and an archiver on the whole Hugging Face home.