diff --git a/.changeset/kind-deer-rest.md b/.changeset/kind-deer-rest.md
new file mode 100644
index 000000000..716c7b71b
--- /dev/null
+++ b/.changeset/kind-deer-rest.md
@@ -0,0 +1,5 @@
+---
+type: Fixed
+pr: 1633
+---
+**`/gsd:secure-phase` now honors the configured ASVS level and block threshold** — the security auditor previously received unsubstituted `{SECURITY_ASVS}` / `{SECURITY_BLOCK_ON}` placeholder text because secure-phase.md never assigned those variables. It now resolves `workflow.security_asvs_level` and `workflow.security_block_on` from config (`--raw`) before the auditor handoff. (#1625)
diff --git a/gsd-core/workflows/secure-phase.md b/gsd-core/workflows/secure-phase.md
index 90a6d20cf..264ecccd5 100644
--- a/gsd-core/workflows/secure-phase.md
+++ b/gsd-core/workflows/secure-phase.md
@@ -27,6 +27,8 @@ Parse: `phase_dir`, `phase_number`, `phase_name`, `phase_slug`, `padded_phase`.
 ```bash
 AUDITOR_MODEL=$(gsd_run query resolve-model gsd-security-auditor --raw)
 VERIFY_POST_HOOKS_JSON=$(gsd_run loop render-hooks verify:post --raw)
+SECURITY_ASVS=$(gsd_run query config-get workflow.security_asvs_level --raw 2>/dev/null || echo "1")
+SECURITY_BLOCK_ON=$(gsd_run query config-get workflow.security_block_on --raw 2>/dev/null || echo "high")
 ```
 
 Resolve active step hooks from `VERIFY_POST_HOOKS_JSON` where `kind == "step"` and `ref.skill == "secure-phase"`.
@@ -95,6 +97,8 @@ Call AskUserQuestion with threat table and options:
 - `register_authored_at_plan_time: true` — **Verify mitigations exist** — do not scan for new threats. The register is complete; verify each threat's mitigation is present in the implementation.
 - `register_authored_at_plan_time: false` (retroactive-STRIDE mode) — **Retroactive-STRIDE: build a STRIDE register from implementation files first, then verify mitigations.** The phase was authored before formal threat modelling; the auditor must construct the register from scratch before verifying.
 
+Substitute `{SECURITY_ASVS}` with the value of `$SECURITY_ASVS` and `{SECURITY_BLOCK_ON}` with the value of `$SECURITY_BLOCK_ON` resolved in Step 0 via `config-get`.
+
 Print: `◆ Spawning security auditor... (runs in a subagent — no output until it returns, ~1–5 min; expected, not a freeze)`
 
 ```
diff --git a/tests/secure-phase.test.cjs b/tests/secure-phase.test.cjs
index 2038f092b..e4f7f84ea 100644
--- a/tests/secure-phase.test.cjs
+++ b/tests/secure-phase.test.cjs
@@ -451,3 +451,80 @@ describe('SECURE: threat-model-anchored behaviour', () => {
     );
   });
 });
+
+// ─── 8. Regression: security config variables resolved before use (#1625) ────
+// allow-test-rule: runtime-contract-is-the-product — secure-phase.md prose is the executed contract (#1625)
+
+describe('SECURE: security config variables resolved before use (#1625)', () => {
+  const wfPath = path.join(WORKFLOWS_DIR, 'secure-phase.md');
+
+  test('SECURITY_ASVS is assigned (not only used as placeholder)', () => {
+    const content = fs.readFileSync(wfPath, 'utf-8');
+    assert.ok(
+      content.includes('SECURITY_ASVS='),
+      'SECURITY_ASVS must be assigned via config-get in the workflow, not only appear as {SECURITY_ASVS} placeholder'
+    );
+  });
+
+  test('SECURITY_BLOCK_ON is assigned (not only used as placeholder)', () => {
+    const content = fs.readFileSync(wfPath, 'utf-8');
+    assert.ok(
+      content.includes('SECURITY_BLOCK_ON='),
+      'SECURITY_BLOCK_ON must be assigned via config-get in the workflow, not only appear as {SECURITY_BLOCK_ON} placeholder'
+    );
+  });
+
+  test('SECURITY_ASVS assignment appears before the auditor <config> injection line', () => {
+    const content = fs.readFileSync(wfPath, 'utf-8');
+    const assignIdx = content.indexOf('SECURITY_ASVS=');
+    const configInjIdx = content.indexOf('block_on: {SECURITY_BLOCK_ON}');
+    assert.ok(assignIdx > -1, 'SECURITY_ASVS= must exist in the file');
+    assert.ok(configInjIdx > -1, 'block_on: {SECURITY_BLOCK_ON} injection line must exist');
+    assert.ok(
+      assignIdx < configInjIdx,
+      'SECURITY_ASVS must be assigned before the auditor <config> injection line that references {SECURITY_BLOCK_ON}'
+    );
+  });
+
+  test('SECURITY_BLOCK_ON assignment appears before the auditor <config> injection line', () => {
+    const content = fs.readFileSync(wfPath, 'utf-8');
+    const assignIdx = content.indexOf('SECURITY_BLOCK_ON=');
+    const configInjIdx = content.indexOf('block_on: {SECURITY_BLOCK_ON}');
+    assert.ok(assignIdx > -1, 'SECURITY_BLOCK_ON= must exist in the file');
+    assert.ok(configInjIdx > -1, 'block_on: {SECURITY_BLOCK_ON} injection line must exist');
+    assert.ok(
+      assignIdx < configInjIdx,
+      'SECURITY_BLOCK_ON must be assigned before the auditor <config> injection line that references it'
+    );
+  });
+
+  test('security config resolved via config-get with correct keys and defaults', () => {
+    const content = fs.readFileSync(wfPath, 'utf-8');
+    assert.ok(
+      content.includes('config-get workflow.security_asvs_level'),
+      'must resolve SECURITY_ASVS via config-get workflow.security_asvs_level'
+    );
+    assert.ok(
+      content.includes('config-get workflow.security_block_on'),
+      'must resolve SECURITY_BLOCK_ON via config-get workflow.security_block_on'
+    );
+    assert.ok(
+      content.includes('echo "1"') && content.includes('echo "high"'),
+      'config-get resolution must include the registry default fallbacks (1, high) so an unset/failed lookup still yields a valid value'
+    );
+  });
+
+  test('security config-get uses --raw so the injected string value is unquoted', () => {
+    const content = fs.readFileSync(wfPath, 'utf-8');
+    // Without --raw, config-get returns JSON ("high" with quotes), which would
+    // corrupt the auditor <config> block to `block_on: "high"`. --raw yields bare `high`.
+    assert.ok(
+      /config-get workflow\.security_block_on --raw/.test(content),
+      'SECURITY_BLOCK_ON must be resolved with --raw (config-get returns a quoted "high" without it)'
+    );
+    assert.ok(
+      /config-get workflow\.security_asvs_level --raw/.test(content),
+      'SECURITY_ASVS must be resolved with --raw for consistency'
+    );
+  });
+});
diff --git a/tests/workflow-size-baseline.json b/tests/workflow-size-baseline.json
index d878bca24..4cf4f368f 100644
--- a/tests/workflow-size-baseline.json
+++ b/tests/workflow-size-baseline.json
@@ -65,7 +65,7 @@
   "resume-project.md": 17226,
   "review.md": 39404,
   "scan.md": 7688,
-  "secure-phase.md": 12282,
+  "secure-phase.md": 12656,
   "session-report.md": 4044,
   "settings-advanced.md": 39666,
   "settings-integrations.md": 15848,