diff --git a/.circleci/config.yml b/.circleci/config.yml
index 2317533eb..8167c1671 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -227,12 +227,21 @@ jobs:
       - run:
           name: Install Gitleaks
           command: |
+            set -euo pipefail
             GITLEAKS_VERSION="8.21.2"
-            curl -sSfL \
-              "https://github.com/gitleaks/gitleaks/releases/download/v${GITLEAKS_VERSION}/gitleaks_${GITLEAKS_VERSION}_linux_x64.tar.gz" \
-              | tar -xz gitleaks
-            sudo mv gitleaks /usr/local/bin/gitleaks
-            gitleaks version
+            GITLEAKS_ARCHIVE="gitleaks_${GITLEAKS_VERSION}_linux_x64.tar.gz"
+            GITLEAKS_SHA256="5bc41815076e6ed6ef8fbecc9d9b75bcae31f39029ceb55da08086315316e3ba"
+            GITLEAKS_TEMP="$(mktemp -d)"
+            GITLEAKS_PATH="${GITLEAKS_TEMP}/${GITLEAKS_ARCHIVE}"
+            trap 'rm -rf -- "${GITLEAKS_TEMP}"' EXIT
+
+            curl --fail --location --silent --show-error --retry 3 \
+              "https://github.com/gitleaks/gitleaks/releases/download/v${GITLEAKS_VERSION}/${GITLEAKS_ARCHIVE}" \
+              --output "${GITLEAKS_PATH}"
+            printf '%s  %s\n' "${GITLEAKS_SHA256}" "${GITLEAKS_PATH}" | sha256sum --check --strict
+            tar -xzf "${GITLEAKS_PATH}" -C "${GITLEAKS_TEMP}" gitleaks
+            sudo install -m 0755 "${GITLEAKS_TEMP}/gitleaks" /usr/local/bin/gitleaks
+            test "$(gitleaks version)" = "${GITLEAKS_VERSION}"
       - run:
           name: Run Gitleaks — detect committed secrets
           command: |
diff --git a/.github/README.md b/.github/README.md
index 9892f60b0..1a4233b5b 100644
--- a/.github/README.md
+++ b/.github/README.md
@@ -55,19 +55,17 @@ See also: [product surfaces](https://github.com/szl-holdings/platform/tree/main/
 
 | Workflow | Trigger | Required Check | Purpose |
 |----------|---------|----------------|---------|
-| `ci.yml` | PR + push to `main`/`master` | `CI Gate` | Aggregate gate: lint, typecheck, test, build, integration tests, secret scan, readiness smoke, proof-chain, route security |
+| `ci.yml` | PR + push to `main` | Individual checks | Clean-clone validation on Linux and Windows, lint, and TypeScript typecheck |
 | `ci.yml` | PR + push to `main`/`master` | `Readiness Gate (smoke:product-mode)` | Product-mode API smoke test surfaced separately for fast PR visibility |
 | `e2e.yml` | PR + push to `main`/`master` | `E2E Gate` | Full Playwright matrix across all artifact surfaces + axe-core a11y |
 | `dependency-review.yml` | PR only | `dependency-review` | OSS vulnerability scan on changed dependencies |
 | `codeql.yml` | PR + push + weekly schedule | `analyze` | GitHub CodeQL static analysis (JavaScript/TypeScript) |
 
-### Security (advisory / scheduled)
+### Security
 
 | Workflow | Trigger | Purpose |
 |----------|---------|---------|
-| `security.yml` | PR + push | Dependency vulnerability scan + SBOM generation |
-| `secret-scan-scheduled.yml` | Daily 06:17 UTC + `.gitleaks.toml` changes | Full-history Gitleaks scan against `main`; uploads SARIF to Security tab and opens triage issue on findings |
-| `secret-scan.yml` | PR only | PR-diff Gitleaks scan using `.gitleaks.toml` |
+| `security.yml` | PR to `main` + push to `main` + manual + Mondays 03:00 UTC | Dependency/SBOM checks, Gitleaks and project-specific secret scans, lockfile integrity, license report, and the fan-in `Security Gate (blocking)` job |
 
 ### Build & Quality (advisory)
 
@@ -131,10 +129,11 @@ All Dependabot PRs must pass the same required CI checks as any other PR.
 
 ## Secret Scanning
 
-Two complementary layers:
+Three complementary layers:
 
-1. **PR-time gate** (`ci.yml` → `secret-scan` job + `secret-scan.yml`): Gitleaks scans the PR diff using `.gitleaks.toml`. Blocks merge on any finding.
-2. **Scheduled sweep** (`secret-scan-scheduled.yml`): Full-history Gitleaks scan of `main` every day at 06:17 UTC. Uploads SARIF to the Security tab; opens a triage issue on findings.
+1. **GitHub-native scanning and push protection:** provider-known patterns are checked by GitHub, including before accepted pushes when push protection matches.
+2. **PR-time scan** (`security.yml` → `secret-scan`): Gitleaks scans the PR's base-to-head commit range, then the project-specific scanner checks the current tree. A finding fails the `Security Gate (blocking)` fan-in job.
+3. **Default-branch and scheduled scan** (`security.yml` → `secret-scan`): pushes to `main`, manual dispatches, and the Monday 03:00 UTC schedule scan reachable repository history with Gitleaks and check the current tree with the project-specific scanner.
 
 Config lives in `.gitleaks.toml`. If you need to add an allowlist entry, document the reason inline and keep patterns as narrow as possible.
 
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index c527fad15..143b71763 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -72,12 +72,19 @@ jobs:
 
       - name: Install Gitleaks
         run: |
+          set -euo pipefail
           GITLEAKS_VERSION="8.21.2"
-          curl -sSfL \
-            "https://github.com/gitleaks/gitleaks/releases/download/v${GITLEAKS_VERSION}/gitleaks_${GITLEAKS_VERSION}_linux_x64.tar.gz" \
-            | tar -xz gitleaks
-          sudo mv gitleaks /usr/local/bin/gitleaks
-          gitleaks version
+          GITLEAKS_ARCHIVE="gitleaks_${GITLEAKS_VERSION}_linux_x64.tar.gz"
+          GITLEAKS_SHA256="5bc41815076e6ed6ef8fbecc9d9b75bcae31f39029ceb55da08086315316e3ba"
+          GITLEAKS_PATH="${RUNNER_TEMP}/${GITLEAKS_ARCHIVE}"
+
+          curl --fail --location --silent --show-error --retry 3 \
+            "https://github.com/gitleaks/gitleaks/releases/download/v${GITLEAKS_VERSION}/${GITLEAKS_ARCHIVE}" \
+            --output "${GITLEAKS_PATH}"
+          printf '%s  %s\n' "${GITLEAKS_SHA256}" "${GITLEAKS_PATH}" | sha256sum --check --strict
+          tar -xzf "${GITLEAKS_PATH}" -C "${RUNNER_TEMP}" gitleaks
+          sudo install -m 0755 "${RUNNER_TEMP}/gitleaks" /usr/local/bin/gitleaks
+          test "$(gitleaks version)" = "${GITLEAKS_VERSION}"
 
       - name: Run Gitleaks — detect committed secrets
 
@@ -85,8 +92,8 @@ jobs:
           PR_BASE_SHA: ${{ github.event.pull_request.base.sha }}
           PR_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
         run: |
-          # On a pull_request event scan only the commits in the PR; on push/schedule
-          # scan the entire current HEAD tree.
+          # On a pull_request event scan only the commits in the PR. Push, scheduled,
+          # and manual runs scan the repository history reachable from the checkout.
           if [[ "${{ github.event_name }}" == "pull_request" ]]; then
             gitleaks detect \
               --source . \
diff --git a/ops/github/secret-scanning-runbook.md b/ops/github/secret-scanning-runbook.md
index 075f22e22..54e1675d3 100644
--- a/ops/github/secret-scanning-runbook.md
+++ b/ops/github/secret-scanning-runbook.md
@@ -1,13 +1,13 @@
 # Runbook — Secret Scan Hit Triage
 
-Last updated: 2026-04-19
+Last updated: 2026-08-13
 Owner: SZL Holdings (repo owner)
 
 This runbook covers what to do when **any** of the following fires on the
-public `szl-holdings/szl-holdings-platform` repo:
+public `szl-holdings/platform` repo:
 
 - The PR-time Gitleaks gate (`Security Audit & SBOM / Secret Scan (Gitleaks)` in `.github/workflows/security.yml`)
-- The daily scheduled Gitleaks sweep (`Secret Scan (Scheduled — main)` in `.github/workflows/secret-scan-scheduled.yml`)
+- The scheduled or manual Gitleaks sweep (`Security Audit & SBOM` in `.github/workflows/security.yml`)
 - GitHub-native secret scanning alert (Security → Secret scanning)
 - Push protection bounced a `git push` with a "Secret detected" message
 
@@ -17,14 +17,14 @@ public `szl-holdings/szl-holdings-platform` repo:
 |---|---|---|---|
 | GitHub native secret scanning | Repo Settings → Code security → "Secret scanning" | Partner-known token patterns (AWS, GCP, GitHub, Stripe, Slack, …) | On every push to any branch, continuously over history |
 | GitHub push protection | Repo Settings → Code security → "Push protection" | Same partner-known patterns, **before** the push lands | At `git push` time (blocking) |
-| Gitleaks PR gate | `.github/workflows/security.yml` → `secret-scan` job | Full Gitleaks ruleset + repo overrides in `.gitleaks.toml` | Every PR (blocking — required check) |
-| Gitleaks scheduled sweep | `.github/workflows/secret-scan-scheduled.yml` | Full Gitleaks ruleset over full `main` history; SARIF → Security tab | Daily 06:17 UTC + manual dispatch |
-| Project-specific scanner | `scripts/qa/scan-secrets.js` | Internal naming patterns (belt-and-suspenders) | Inside the PR gate |
+| Gitleaks PR gate | `.github/workflows/security.yml` → `secret-scan` job | Full Gitleaks ruleset + repo overrides in `.gitleaks.toml` over the PR base-to-head range | Every PR; a finding fails the fan-in `Security Gate (blocking)` job |
+| Gitleaks history sweep | `.github/workflows/security.yml` → `secret-scan` job | Full Gitleaks ruleset over history reachable from the checked-out `main` ref | Pushes to `main`, Mondays 03:00 UTC, and manual dispatch |
+| Project-specific scanner | `scripts/qa/scan-secrets.js` | Internal naming patterns (belt-and-suspenders) in the current tree | Every `security.yml` PR, push, scheduled, and manual run |
 
 ## One-time GitHub setup (owner-only, click-path)
 
 Both of the following must be **enabled** on
-`szl-holdings/szl-holdings-platform`. They are free on public repos.
+`szl-holdings/platform`. They are free on public repos.
 
 1. **Settings → Code security**
 2. Under **Secret scanning** click **Enable**.
@@ -46,7 +46,7 @@ scanning: Enabled** and **Push protection: Enabled** with a green check.
 
 ### Step 1 — Confirm it's a real secret (not a fixture)
 
-1. Open the alert / SARIF finding / failed run and read the matched line **in the redacted form GitHub shows you**.
+1. Open the native alert or failed workflow run and read the matched line **only in the redacted form GitHub shows you**.
 2. Check the file path against the known-safe list:
    - `tests/**`, `**/__fixtures__/**`, `**/*.test.*`, `**/*.spec.*`
    - `packages/demo-seed/**`, `packages/simulation/**`, `packages/replay-core/**`
@@ -67,7 +67,7 @@ The credential is already public — rotation is the only mitigation.
    - Production runtime: follow `infra/runbooks/RUNBOOK_SECRETS.md`.
 3. **Verify rotation** by triggering a workflow run (or `workflow_dispatch` of `Security Audit & SBOM`) that uses the secret and confirming it succeeds.
 4. **Record the rotation** as a row in the table at the bottom of this file.
-5. **Close the GitHub alert** with the resolution **"Revoked"** (Security → Secret scanning → click the alert → "Close as → Revoked"). For a Gitleaks-triggered triage issue, close it with a comment linking the rotation row.
+5. **Close the GitHub alert** with the resolution **"Revoked"** (Security → Secret scanning → click the alert → "Close as → Revoked").
 6. **Sweep history** with `gitleaks detect --log-opts="--all"` locally to confirm no other instance of the same value exists elsewhere in history; if it does, rotate any other affected credential too.
 
 ### Step 3 — Prevent the recurrence
@@ -75,14 +75,14 @@ The credential is already public — rotation is the only mitigation.
 For every confirmed leak, add a follow-up in the same PR / issue:
 
 - If a developer workflow allowed the leak (e.g., copy-pasting an env value into source), document the safer pattern in `infra/runbooks/RUNBOOK_SECRETS.md`.
-- If Gitleaks did not catch the pattern but should have, add a `[[rules]]` entry to `.gitleaks.toml` and re-run the scheduled workflow via **Actions → Secret Scan (Scheduled — main) → Run workflow**.
+- If Gitleaks did not catch the pattern but should have, add a `[[rules]]` entry to `.gitleaks.toml` and re-run **Actions → Security Audit & SBOM → Run workflow**.
 
 ## Manual on-demand scan
 
-Anyone with `read` on the repo can trigger the scheduled scan ad-hoc:
+An authorized maintainer can trigger the scan ad-hoc:
 
 ```text
-Actions → Secret Scan (Scheduled — main) → Run workflow → main → Run workflow
+Actions → Security Audit & SBOM → Run workflow → main → Run workflow
 ```
 
 Locally:
diff --git a/services/customer-portal/.github/workflows/gitleaks.yml b/services/customer-portal/.github/workflows/gitleaks.yml
index 6cc925329..208983b26 100644
--- a/services/customer-portal/.github/workflows/gitleaks.yml
+++ b/services/customer-portal/.github/workflows/gitleaks.yml
@@ -26,13 +26,21 @@ jobs:
           fetch-depth: 0
       - name: Install gitleaks
         run: |
-          VER="8.21.2"
-          curl -sSL "https://github.com/gitleaks/gitleaks/releases/download/v${VER}/gitleaks_${VER}_linux_x64.tar.gz" -o /tmp/gitleaks.tgz
-          tar -xzf /tmp/gitleaks.tgz -C /tmp gitleaks
-          sudo install /tmp/gitleaks /usr/local/bin/gitleaks
-          gitleaks version
+          set -euo pipefail
+          GITLEAKS_VERSION="8.21.2"
+          GITLEAKS_ARCHIVE="gitleaks_${GITLEAKS_VERSION}_linux_x64.tar.gz"
+          GITLEAKS_SHA256="5bc41815076e6ed6ef8fbecc9d9b75bcae31f39029ceb55da08086315316e3ba"
+          GITLEAKS_PATH="${RUNNER_TEMP}/${GITLEAKS_ARCHIVE}"
+
+          curl --fail --location --silent --show-error --retry 3 \
+            "https://github.com/gitleaks/gitleaks/releases/download/v${GITLEAKS_VERSION}/${GITLEAKS_ARCHIVE}" \
+            --output "${GITLEAKS_PATH}"
+          printf '%s  %s\n' "${GITLEAKS_SHA256}" "${GITLEAKS_PATH}" | sha256sum --check --strict
+          tar -xzf "${GITLEAKS_PATH}" -C "${RUNNER_TEMP}" gitleaks
+          sudo install -m 0755 "${RUNNER_TEMP}/gitleaks" /usr/local/bin/gitleaks
+          test "$(gitleaks version)" = "${GITLEAKS_VERSION}"
       - name: Gitleaks scan
         run: |
-          CFG=""
-          [ -f .gitleaks.toml ] && CFG="-c .gitleaks.toml"
-          gitleaks detect --no-banner --redact ${CFG} --exit-code 1
+          GITLEAKS_CONFIG=()
+          [ -f .gitleaks.toml ] && GITLEAKS_CONFIG=(-c .gitleaks.toml)
+          gitleaks detect --no-banner --redact "${GITLEAKS_CONFIG[@]}" --exit-code 1