diff --git a/scripts/update_dynamic_goldens.sh b/scripts/update_dynamic_goldens.sh
new file mode 100755
index 00000000..eb5b3b41
--- /dev/null
+++ b/scripts/update_dynamic_goldens.sh
@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+# Regenerate dynamic-fixture golden verdicts.
+#
+# Usage:
+#   ./scripts/update_dynamic_goldens.sh [--test <name>]
+#
+# Re-runs the dynamic fixture suites under `NYX_UPDATE_GOLDENS=1` so each
+# fixture's harness overwrites its `.golden.json` file with the current
+# verdict. After this script completes, rerun without the env var to
+# confirm the goldens match.
+#
+# Default: refreshes both python_fixtures and rust_fixtures. Pass --test
+# to refresh only one suite (e.g. `--test python_fixtures`).
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+
+SUITES=(python_fixtures rust_fixtures)
+if [[ $# -gt 0 ]]; then
+  case "$1" in
+    --test) SUITES=("$2"); shift 2 ;;
+    -h|--help)
+      sed -n '2,12p' "$0"
+      exit 0
+      ;;
+    *)
+      echo "unknown arg: $1" >&2
+      exit 1
+      ;;
+  esac
+fi
+
+cd "$REPO_ROOT"
+
+for suite in "${SUITES[@]}"; do
+  echo "[update-goldens] refreshing $suite ..."
+  NYX_UPDATE_GOLDENS=1 \
+    cargo nextest run --features dynamic --test "$suite" --no-fail-fast
+done
+
+echo "[update-goldens] re-running suites without NYX_UPDATE_GOLDENS=1 to verify ..."
+for suite in "${SUITES[@]}"; do
+  cargo nextest run --features dynamic --test "$suite"
+done
+
+echo "[update-goldens] done. Inspect git diff under tests/dynamic_fixtures/ before committing."
diff --git a/src/dynamic/oob.rs b/src/dynamic/oob.rs
index b8ce1a4d..d93a5d7d 100644
--- a/src/dynamic/oob.rs
+++ b/src/dynamic/oob.rs
@@ -5,6 +5,17 @@
 //! URL path.  The lifetime of the listener is per-scan: create one
 //! [`OobListener`] at scan start, drop it when the scan finishes.
 //!
+//! # Wiring
+//!
+//! As of Phase 05 the listener is load-bearing: [`crate::dynamic::verify::VerifyOptions::from_config`]
+//! constructs one per scan via [`OobListener::bind`] and threads it into
+//! [`crate::dynamic::sandbox::SandboxOptions::oob_listener`]. The runner
+//! polls [`OobListener::was_nonce_hit`] after each sandbox run (see
+//! `src/dynamic/runner.rs`) and toggles
+//! [`crate::dynamic::sandbox::SandboxOutcome::oob_callback_seen`] when a
+//! probe arrives — that is the only signal that turns an OOB-only sink
+//! (e.g. blind SSRF) into a `Confirmed` verdict.
+//!
 //! # Nonce URL
 //!
 //! The caller generates a per-finding nonce (UUID4 hex) and embeds it in
diff --git a/src/dynamic/verify.rs b/src/dynamic/verify.rs
index fea31336..954577aa 100644
--- a/src/dynamic/verify.rs
+++ b/src/dynamic/verify.rs
@@ -6,6 +6,7 @@
 use crate::callgraph::CallGraph;
 use crate::commands::scan::Diag;
 use crate::dynamic::corpus::{payloads_for, CORPUS_VERSION};
+use crate::dynamic::oob::OobListener;
 use crate::dynamic::report::{AttemptSummary, VerifyResult, VerifyStatus};
 use crate::dynamic::runner::{run_spec, RunError};
 use crate::dynamic::sandbox::{toolchain_id_with_digest, SandboxOptions};
@@ -54,6 +55,17 @@ pub struct VerifyOptions {
 
 impl VerifyOptions {
     /// Build `VerifyOptions` from scanner config.
+    ///
+    /// Binds a per-scan [`OobListener`] on a free loopback port and attaches
+    /// it to `sandbox.oob_listener`. The listener is held by `Arc` so every
+    /// per-finding clone of `VerifyOptions` shares the same accept thread;
+    /// it is torn down via the `OobListener::Drop` impl once the last
+    /// `Arc` is released at end of scan.
+    ///
+    /// If `OobListener::bind` fails (e.g. all loopback ports are in use),
+    /// the field stays `None`; the runner skips OOB-callback payloads
+    /// (`src/dynamic/runner.rs` `oob_nonce_slot` branch) while non-OOB
+    /// payloads continue to run against their existing oracle.
     pub fn from_config(config: &Config) -> Self {
         use crate::dynamic::sandbox::SandboxBackend;
         let backend = match config.scanner.verify_backend.as_str() {
@@ -61,9 +73,11 @@ impl VerifyOptions {
             "process" => SandboxBackend::Process,
             _ => SandboxBackend::Auto,
         };
+        let oob_listener = OobListener::bind().ok().map(Arc::new);
         Self {
             sandbox: SandboxOptions {
                 backend,
+                oob_listener,
                 ..SandboxOptions::default()
             },
             project_root: None,
diff --git a/tests/common/fixture_harness.rs b/tests/common/fixture_harness.rs
new file mode 100644
index 00000000..97370914
--- /dev/null
+++ b/tests/common/fixture_harness.rs
@@ -0,0 +1,249 @@
+//! Golden-verdict regression harness for dynamic-verification fixtures.
+//!
+//! Replaces the original hand-rolled `assert_eq!(status, Confirmed)` style
+//! with a "current verdict is the golden" model: each fixture's first run
+//! (under `NYX_UPDATE_GOLDENS=1`) records its current verdict shape into a
+//! `.golden.json` file checked in beside the fixture; subsequent runs diff
+//! against that golden and fail on regression.
+//!
+//! The contract is intentionally agnostic to the verdict's polarity. A
+//! fixture stuck at `Inconclusive(BuildFailed)` because of a missing
+//! toolchain is locked at that shape until someone consciously refreshes the
+//! golden via `scripts/update_dynamic_goldens.sh`. A flip to `Confirmed` is
+//! also a "regression" in the harness's sense and surfaces as a test
+//! failure, prompting an explicit golden update.
+
+use nyx_scanner::commands::scan::Diag;
+use nyx_scanner::dynamic::verify::{verify_finding, VerifyOptions};
+use nyx_scanner::evidence::{
+    Confidence, Evidence, FlowStep, FlowStepKind, InconclusiveReason, UnsupportedReason,
+    VerifyResult, VerifyStatus,
+};
+use nyx_scanner::labels::Cap;
+use nyx_scanner::patterns::{FindingCategory, Severity};
+use serde::{Deserialize, Serialize};
+use std::path::{Path, PathBuf};
+use std::sync::Mutex;
+use tempfile::TempDir;
+
+/// Serialise-once lock guarding the process-global env vars
+/// (`NYX_REPRO_BASE`, `NYX_TELEMETRY_PATH`) and the shared build cache dir.
+/// Shared across `python_fixtures` / `rust_fixtures` to prevent cross-suite
+/// races when nextest runs them in parallel within the same test binary.
+pub static FIXTURE_LOCK: Mutex<()> = Mutex::new(());
+
+/// How the fixture source should land relative to the harness's tempdir
+/// before [`verify_finding`] is invoked. Mirrors the original per-language
+/// behaviour: Python copies the file beside its sibling-import siblings;
+/// Rust lays it out as `src/entry.rs` so the Cargo project emitter finds it.
+#[derive(Debug, Clone, Copy)]
+#[allow(dead_code)] // Each test binary uses only one variant; the other is dead per-crate.
+pub enum CopyStrategy {
+    /// Copy the fixture to `tempdir/{fixture_basename}`. The synthesised Diag
+    /// points at the copy so the Python harness can import it directly.
+    PreserveName,
+    /// Copy the fixture to `tempdir/src/entry.rs`. The synthesised Diag
+    /// points at the original fixture path (the Rust emitter reads source via
+    /// the absolute Diag path, not via the temp-dir layout).
+    RustEntry,
+}
+
+/// Per-fixture specification.
+pub struct FixtureSpec<'a> {
+    /// Subdirectory under `tests/dynamic_fixtures/` (e.g. `"python"`, `"rust"`).
+    pub lang_dir: &'a str,
+    /// Fixture filename within `lang_dir`.
+    pub fixture: &'a str,
+    /// Entry-point function name passed in the synthesised flow-step.
+    pub func: &'a str,
+    /// Sink capability bits to set on `Evidence.sink_caps`.
+    pub cap: Cap,
+    /// Sink line for the synthesised flow-step. Adversarial fixtures pass a
+    /// line that does not exist in the source (e.g. 999) so the probe cannot
+    /// fire while the oracle marker still prints.
+    pub sink_line: u32,
+    /// Confidence stamp on the Diag. `Confidence::Low` short-circuits to
+    /// `Unsupported(ConfidenceTooLow)` before the harness executes.
+    pub confidence: Confidence,
+    /// File-layout strategy for the temp-dir copy.
+    pub copy: CopyStrategy,
+}
+
+/// Trimmed verdict shape persisted in the `.golden.json` file.
+///
+/// Captures the fields a regression test must pin: status + typed reasons
+/// + whether a payload triggered. Excludes machine-dependent fields
+/// (`finding_id`, `detail`, `attempts`, `toolchain_match`).
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct GoldenVerdict {
+    pub status: VerifyStatus,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub reason: Option<UnsupportedReason>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub inconclusive_reason: Option<InconclusiveReason>,
+    #[serde(default)]
+    pub triggered: bool,
+}
+
+impl From<&VerifyResult> for GoldenVerdict {
+    fn from(v: &VerifyResult) -> Self {
+        Self {
+            status: v.status,
+            reason: v.reason.clone(),
+            inconclusive_reason: v.inconclusive_reason.clone(),
+            triggered: v.triggered_payload.is_some(),
+        }
+    }
+}
+
+/// Run the fixture through `verify_finding` and either compare against the
+/// stored golden or — when `NYX_UPDATE_GOLDENS=1` — overwrite the golden
+/// with the current verdict.
+pub fn run_fixture_and_compare_to_golden(spec: &FixtureSpec<'_>) {
+    let _guard = FIXTURE_LOCK.lock().unwrap_or_else(|e| e.into_inner());
+
+    let fixture_root = fixture_dir(spec.lang_dir);
+    let fixture_src = fixture_root.join(spec.fixture);
+    let golden_path = fixture_root.join(format!("{}.golden.json", spec.fixture));
+
+    let tmp = TempDir::new().expect("create tempdir");
+    let diag_path = stage_fixture(&fixture_src, &tmp, spec.copy);
+
+    // SAFETY: env mutation is serialised by FIXTURE_LOCK and the vars are
+    // cleared before the lock guard drops at end of function.
+    unsafe {
+        std::env::set_var("NYX_REPRO_BASE", tmp.path().join("repro").to_str().unwrap());
+        std::env::set_var(
+            "NYX_TELEMETRY_PATH",
+            tmp.path().join("events.jsonl").to_str().unwrap(),
+        );
+    }
+
+    let mut diag = make_diag(&diag_path, spec.func, spec.cap, spec.sink_line);
+    diag.confidence = Some(spec.confidence);
+
+    let opts = VerifyOptions::default();
+    let result = verify_finding(&diag, &opts);
+
+    unsafe {
+        std::env::remove_var("NYX_REPRO_BASE");
+        std::env::remove_var("NYX_TELEMETRY_PATH");
+    }
+
+    let current = GoldenVerdict::from(&result);
+    let mut current_json =
+        serde_json::to_string_pretty(&current).expect("serialise golden verdict");
+    current_json.push('\n');
+
+    if std::env::var("NYX_UPDATE_GOLDENS").is_ok_and(|v| v == "1") {
+        std::fs::write(&golden_path, &current_json).unwrap_or_else(|e| {
+            panic!("write golden {}: {e}", golden_path.display())
+        });
+        return;
+    }
+
+    let expected_json = std::fs::read_to_string(&golden_path).unwrap_or_else(|e| {
+        panic!(
+            "missing golden {}: {e}\n\
+             current verdict:\n{current_json}\n\
+             rerun with NYX_UPDATE_GOLDENS=1 ./scripts/update_dynamic_goldens.sh to seed it.",
+            golden_path.display()
+        )
+    });
+    let expected: GoldenVerdict = serde_json::from_str(&expected_json)
+        .unwrap_or_else(|e| panic!("parse golden {}: {e}", golden_path.display()));
+
+    if current != expected {
+        panic!(
+            "golden regression for {}:\n\
+             expected: {expected_json}\n\
+             actual:   {current_json}\n\
+             detail: {:?}\n\
+             rerun with NYX_UPDATE_GOLDENS=1 ./scripts/update_dynamic_goldens.sh if intended.",
+            spec.fixture, result.detail
+        );
+    }
+}
+
+fn fixture_dir(lang_dir: &str) -> PathBuf {
+    PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .join("tests/dynamic_fixtures")
+        .join(lang_dir)
+}
+
+fn stage_fixture(src: &Path, tmp: &TempDir, copy: CopyStrategy) -> PathBuf {
+    match copy {
+        CopyStrategy::PreserveName => {
+            let dst = tmp.path().join(src.file_name().expect("fixture has filename"));
+            std::fs::copy(src, &dst).expect("copy fixture into tempdir");
+            dst
+        }
+        CopyStrategy::RustEntry => {
+            let dst_dir = tmp.path().join("src");
+            std::fs::create_dir_all(&dst_dir).expect("create src/ in tempdir");
+            let dst = dst_dir.join("entry.rs");
+            std::fs::copy(src, &dst).expect("copy fixture into tempdir/src/entry.rs");
+            // The Rust harness emitter reads source via the Diag's absolute path,
+            // not via the temp-dir layout, so the Diag must point at the original
+            // fixture file. The temp-dir copy is only consulted by the harness
+            // builder for the workdir-relative `src/entry.rs` view.
+            src.to_path_buf()
+        }
+    }
+}
+
+fn make_diag(path: &Path, func: &str, cap: Cap, sink_line: u32) -> Diag {
+    let path_str = path.to_string_lossy().into_owned();
+    let evidence = Evidence {
+        flow_steps: vec![
+            FlowStep {
+                step: 1,
+                kind: FlowStepKind::Source,
+                file: path_str.clone(),
+                line: 1,
+                col: 0,
+                snippet: None,
+                variable: Some("payload".into()),
+                callee: None,
+                function: Some(func.to_owned()),
+                is_cross_file: false,
+            },
+            FlowStep {
+                step: 2,
+                kind: FlowStepKind::Sink,
+                file: path_str.clone(),
+                line: sink_line,
+                col: 4,
+                snippet: None,
+                variable: None,
+                callee: None,
+                function: None,
+                is_cross_file: false,
+            },
+        ],
+        sink_caps: cap.bits(),
+        ..Default::default()
+    };
+    Diag {
+        path: path_str,
+        line: sink_line as usize,
+        col: 0,
+        severity: Severity::High,
+        id: "taint-unsanitised-flow".into(),
+        category: FindingCategory::Security,
+        path_validated: false,
+        guard_kind: None,
+        message: None,
+        labels: vec![],
+        confidence: Some(Confidence::High),
+        evidence: Some(evidence),
+        rank_score: None,
+        rank_reason: None,
+        suppressed: false,
+        suppression: None,
+        rollup: None,
+        finding_id: String::new(),
+        alternative_finding_ids: vec![],
+        stable_hash: 0,
+    }
+}
diff --git a/tests/common/mod.rs b/tests/common/mod.rs
index 48b9bd52..26e9ac35 100644
--- a/tests/common/mod.rs
+++ b/tests/common/mod.rs
@@ -2,6 +2,13 @@
 
 pub mod recall;
 
+// Only `python_fixtures` and `rust_fixtures` reference these symbols; every
+// other test binary pulls `mod common` in and would otherwise emit
+// per-binary `dead_code` warnings for the whole submodule.
+#[cfg(feature = "dynamic")]
+#[allow(dead_code)]
+pub mod fixture_harness;
+
 use nyx_scanner::commands::scan::Diag;
 use nyx_scanner::utils::config::{AnalysisMode, Config};
 use serde::Deserialize;
diff --git a/tests/dynamic_fixtures/python/cmdi_adversarial.py.golden.json b/tests/dynamic_fixtures/python/cmdi_adversarial.py.golden.json
new file mode 100644
index 00000000..2314b8a1
--- /dev/null
+++ b/tests/dynamic_fixtures/python/cmdi_adversarial.py.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Inconclusive",
+  "inconclusive_reason": "OracleCollisionSuspected",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/cmdi_negative.py.golden.json b/tests/dynamic_fixtures/python/cmdi_negative.py.golden.json
new file mode 100644
index 00000000..4a8496c5
--- /dev/null
+++ b/tests/dynamic_fixtures/python/cmdi_negative.py.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "NotConfirmed",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/cmdi_positive.py.golden.json b/tests/dynamic_fixtures/python/cmdi_positive.py.golden.json
new file mode 100644
index 00000000..8c52c98c
--- /dev/null
+++ b/tests/dynamic_fixtures/python/cmdi_positive.py.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "Confirmed",
+  "triggered": true
+}
diff --git a/tests/dynamic_fixtures/python/cmdi_unsupported.py.golden.json b/tests/dynamic_fixtures/python/cmdi_unsupported.py.golden.json
new file mode 100644
index 00000000..eedc028a
--- /dev/null
+++ b/tests/dynamic_fixtures/python/cmdi_unsupported.py.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Unsupported",
+  "reason": "ConfidenceTooLow",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/fileio_adversarial.py.golden.json b/tests/dynamic_fixtures/python/fileio_adversarial.py.golden.json
new file mode 100644
index 00000000..2314b8a1
--- /dev/null
+++ b/tests/dynamic_fixtures/python/fileio_adversarial.py.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Inconclusive",
+  "inconclusive_reason": "OracleCollisionSuspected",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/fileio_negative.py.golden.json b/tests/dynamic_fixtures/python/fileio_negative.py.golden.json
new file mode 100644
index 00000000..4a8496c5
--- /dev/null
+++ b/tests/dynamic_fixtures/python/fileio_negative.py.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "NotConfirmed",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/fileio_positive.py.golden.json b/tests/dynamic_fixtures/python/fileio_positive.py.golden.json
new file mode 100644
index 00000000..8c52c98c
--- /dev/null
+++ b/tests/dynamic_fixtures/python/fileio_positive.py.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "Confirmed",
+  "triggered": true
+}
diff --git a/tests/dynamic_fixtures/python/fileio_unsupported.py.golden.json b/tests/dynamic_fixtures/python/fileio_unsupported.py.golden.json
new file mode 100644
index 00000000..eedc028a
--- /dev/null
+++ b/tests/dynamic_fixtures/python/fileio_unsupported.py.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Unsupported",
+  "reason": "ConfidenceTooLow",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/sqli_adversarial.py.golden.json b/tests/dynamic_fixtures/python/sqli_adversarial.py.golden.json
new file mode 100644
index 00000000..2314b8a1
--- /dev/null
+++ b/tests/dynamic_fixtures/python/sqli_adversarial.py.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Inconclusive",
+  "inconclusive_reason": "OracleCollisionSuspected",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/sqli_negative.py.golden.json b/tests/dynamic_fixtures/python/sqli_negative.py.golden.json
new file mode 100644
index 00000000..4a8496c5
--- /dev/null
+++ b/tests/dynamic_fixtures/python/sqli_negative.py.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "NotConfirmed",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/sqli_positive.py.golden.json b/tests/dynamic_fixtures/python/sqli_positive.py.golden.json
new file mode 100644
index 00000000..8c52c98c
--- /dev/null
+++ b/tests/dynamic_fixtures/python/sqli_positive.py.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "Confirmed",
+  "triggered": true
+}
diff --git a/tests/dynamic_fixtures/python/sqli_unsupported.py.golden.json b/tests/dynamic_fixtures/python/sqli_unsupported.py.golden.json
new file mode 100644
index 00000000..eedc028a
--- /dev/null
+++ b/tests/dynamic_fixtures/python/sqli_unsupported.py.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Unsupported",
+  "reason": "ConfidenceTooLow",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/ssrf_adversarial.py.golden.json b/tests/dynamic_fixtures/python/ssrf_adversarial.py.golden.json
new file mode 100644
index 00000000..2314b8a1
--- /dev/null
+++ b/tests/dynamic_fixtures/python/ssrf_adversarial.py.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Inconclusive",
+  "inconclusive_reason": "OracleCollisionSuspected",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/ssrf_negative.py.golden.json b/tests/dynamic_fixtures/python/ssrf_negative.py.golden.json
new file mode 100644
index 00000000..4a8496c5
--- /dev/null
+++ b/tests/dynamic_fixtures/python/ssrf_negative.py.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "NotConfirmed",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/ssrf_positive.py.golden.json b/tests/dynamic_fixtures/python/ssrf_positive.py.golden.json
new file mode 100644
index 00000000..8c52c98c
--- /dev/null
+++ b/tests/dynamic_fixtures/python/ssrf_positive.py.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "Confirmed",
+  "triggered": true
+}
diff --git a/tests/dynamic_fixtures/python/ssrf_unsupported.py.golden.json b/tests/dynamic_fixtures/python/ssrf_unsupported.py.golden.json
new file mode 100644
index 00000000..eedc028a
--- /dev/null
+++ b/tests/dynamic_fixtures/python/ssrf_unsupported.py.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Unsupported",
+  "reason": "ConfidenceTooLow",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/xss_adversarial.py.golden.json b/tests/dynamic_fixtures/python/xss_adversarial.py.golden.json
new file mode 100644
index 00000000..2314b8a1
--- /dev/null
+++ b/tests/dynamic_fixtures/python/xss_adversarial.py.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Inconclusive",
+  "inconclusive_reason": "OracleCollisionSuspected",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/xss_negative.py.golden.json b/tests/dynamic_fixtures/python/xss_negative.py.golden.json
new file mode 100644
index 00000000..4a8496c5
--- /dev/null
+++ b/tests/dynamic_fixtures/python/xss_negative.py.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "NotConfirmed",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/python/xss_positive.py.golden.json b/tests/dynamic_fixtures/python/xss_positive.py.golden.json
new file mode 100644
index 00000000..8c52c98c
--- /dev/null
+++ b/tests/dynamic_fixtures/python/xss_positive.py.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "Confirmed",
+  "triggered": true
+}
diff --git a/tests/dynamic_fixtures/python/xss_unsupported.py.golden.json b/tests/dynamic_fixtures/python/xss_unsupported.py.golden.json
new file mode 100644
index 00000000..eedc028a
--- /dev/null
+++ b/tests/dynamic_fixtures/python/xss_unsupported.py.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Unsupported",
+  "reason": "ConfidenceTooLow",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/cmdi_adversarial.rs.golden.json b/tests/dynamic_fixtures/rust/cmdi_adversarial.rs.golden.json
new file mode 100644
index 00000000..2314b8a1
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/cmdi_adversarial.rs.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Inconclusive",
+  "inconclusive_reason": "OracleCollisionSuspected",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/cmdi_negative.rs.golden.json b/tests/dynamic_fixtures/rust/cmdi_negative.rs.golden.json
new file mode 100644
index 00000000..4a8496c5
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/cmdi_negative.rs.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "NotConfirmed",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/cmdi_positive.rs.golden.json b/tests/dynamic_fixtures/rust/cmdi_positive.rs.golden.json
new file mode 100644
index 00000000..8c52c98c
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/cmdi_positive.rs.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "Confirmed",
+  "triggered": true
+}
diff --git a/tests/dynamic_fixtures/rust/cmdi_positive2.rs.golden.json b/tests/dynamic_fixtures/rust/cmdi_positive2.rs.golden.json
new file mode 100644
index 00000000..8c52c98c
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/cmdi_positive2.rs.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "Confirmed",
+  "triggered": true
+}
diff --git a/tests/dynamic_fixtures/rust/cmdi_unsupported.rs.golden.json b/tests/dynamic_fixtures/rust/cmdi_unsupported.rs.golden.json
new file mode 100644
index 00000000..eedc028a
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/cmdi_unsupported.rs.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Unsupported",
+  "reason": "ConfidenceTooLow",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/fileio_adversarial.rs.golden.json b/tests/dynamic_fixtures/rust/fileio_adversarial.rs.golden.json
new file mode 100644
index 00000000..2314b8a1
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/fileio_adversarial.rs.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Inconclusive",
+  "inconclusive_reason": "OracleCollisionSuspected",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/fileio_negative.rs.golden.json b/tests/dynamic_fixtures/rust/fileio_negative.rs.golden.json
new file mode 100644
index 00000000..4a8496c5
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/fileio_negative.rs.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "NotConfirmed",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/fileio_positive.rs.golden.json b/tests/dynamic_fixtures/rust/fileio_positive.rs.golden.json
new file mode 100644
index 00000000..8c52c98c
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/fileio_positive.rs.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "Confirmed",
+  "triggered": true
+}
diff --git a/tests/dynamic_fixtures/rust/fileio_positive2.rs.golden.json b/tests/dynamic_fixtures/rust/fileio_positive2.rs.golden.json
new file mode 100644
index 00000000..8c52c98c
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/fileio_positive2.rs.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "Confirmed",
+  "triggered": true
+}
diff --git a/tests/dynamic_fixtures/rust/fileio_unsupported.rs.golden.json b/tests/dynamic_fixtures/rust/fileio_unsupported.rs.golden.json
new file mode 100644
index 00000000..eedc028a
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/fileio_unsupported.rs.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Unsupported",
+  "reason": "ConfidenceTooLow",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/sqli_adversarial.rs.golden.json b/tests/dynamic_fixtures/rust/sqli_adversarial.rs.golden.json
new file mode 100644
index 00000000..2314b8a1
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/sqli_adversarial.rs.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Inconclusive",
+  "inconclusive_reason": "OracleCollisionSuspected",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/sqli_negative.rs.golden.json b/tests/dynamic_fixtures/rust/sqli_negative.rs.golden.json
new file mode 100644
index 00000000..4a8496c5
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/sqli_negative.rs.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "NotConfirmed",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/sqli_positive.rs.golden.json b/tests/dynamic_fixtures/rust/sqli_positive.rs.golden.json
new file mode 100644
index 00000000..8c52c98c
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/sqli_positive.rs.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "Confirmed",
+  "triggered": true
+}
diff --git a/tests/dynamic_fixtures/rust/sqli_unsupported.rs.golden.json b/tests/dynamic_fixtures/rust/sqli_unsupported.rs.golden.json
new file mode 100644
index 00000000..eedc028a
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/sqli_unsupported.rs.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Unsupported",
+  "reason": "ConfidenceTooLow",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/ssrf_adversarial.rs.golden.json b/tests/dynamic_fixtures/rust/ssrf_adversarial.rs.golden.json
new file mode 100644
index 00000000..2314b8a1
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/ssrf_adversarial.rs.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Inconclusive",
+  "inconclusive_reason": "OracleCollisionSuspected",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/ssrf_negative.rs.golden.json b/tests/dynamic_fixtures/rust/ssrf_negative.rs.golden.json
new file mode 100644
index 00000000..4a8496c5
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/ssrf_negative.rs.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "NotConfirmed",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/ssrf_positive.rs.golden.json b/tests/dynamic_fixtures/rust/ssrf_positive.rs.golden.json
new file mode 100644
index 00000000..8c52c98c
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/ssrf_positive.rs.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "Confirmed",
+  "triggered": true
+}
diff --git a/tests/dynamic_fixtures/rust/ssrf_positive2.rs.golden.json b/tests/dynamic_fixtures/rust/ssrf_positive2.rs.golden.json
new file mode 100644
index 00000000..8c52c98c
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/ssrf_positive2.rs.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "Confirmed",
+  "triggered": true
+}
diff --git a/tests/dynamic_fixtures/rust/ssrf_unsupported.rs.golden.json b/tests/dynamic_fixtures/rust/ssrf_unsupported.rs.golden.json
new file mode 100644
index 00000000..eedc028a
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/ssrf_unsupported.rs.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Unsupported",
+  "reason": "ConfidenceTooLow",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/xss_adversarial.rs.golden.json b/tests/dynamic_fixtures/rust/xss_adversarial.rs.golden.json
new file mode 100644
index 00000000..2314b8a1
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/xss_adversarial.rs.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Inconclusive",
+  "inconclusive_reason": "OracleCollisionSuspected",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/xss_negative.rs.golden.json b/tests/dynamic_fixtures/rust/xss_negative.rs.golden.json
new file mode 100644
index 00000000..4a8496c5
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/xss_negative.rs.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "NotConfirmed",
+  "triggered": false
+}
diff --git a/tests/dynamic_fixtures/rust/xss_positive.rs.golden.json b/tests/dynamic_fixtures/rust/xss_positive.rs.golden.json
new file mode 100644
index 00000000..8c52c98c
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/xss_positive.rs.golden.json
@@ -0,0 +1,4 @@
+{
+  "status": "Confirmed",
+  "triggered": true
+}
diff --git a/tests/dynamic_fixtures/rust/xss_unsupported.rs.golden.json b/tests/dynamic_fixtures/rust/xss_unsupported.rs.golden.json
new file mode 100644
index 00000000..eedc028a
--- /dev/null
+++ b/tests/dynamic_fixtures/rust/xss_unsupported.rs.golden.json
@@ -0,0 +1,5 @@
+{
+  "status": "Unsupported",
+  "reason": "ConfidenceTooLow",
+  "triggered": false
+}
diff --git a/tests/python_fixtures.rs b/tests/python_fixtures.rs
index e4768b54..7b8dff21 100644
--- a/tests/python_fixtures.rs
+++ b/tests/python_fixtures.rs
@@ -1,36 +1,33 @@
 //! Python fixture integration tests (§15 Pillar B acceptance gate).
 //!
-//! Runs the dynamic verification pipeline against each Python fixture and
-//! asserts the expected verdict. Requires `--features dynamic` and Python3
-//! to be available on PATH.
+//! Each fixture is run through the dynamic verification pipeline; its
+//! verdict is then compared against the per-fixture golden under
+//! `tests/dynamic_fixtures/python/{name}.golden.json`. Refresh the goldens
+//! via `NYX_UPDATE_GOLDENS=1 ./scripts/update_dynamic_goldens.sh`.
 //!
-//! Verdicts under test:
-//! - positive  → Confirmed
-//! - negative  → NotConfirmed
-//! - unsupported → Unsupported(ConfidenceTooLow) [spec-level rejection]
-//! - adversarial → Inconclusive(OracleCollisionSuspected)
-//!
-//! Tests are skipped when Python3 is not available.
+//! Tests that need python3 on PATH skip with an `eprintln!` when it is
+//! missing; `Confidence::Low` rows do not need python3 because the verifier
+//! short-circuits before harness execution.
+
+mod common;
 
 #[cfg(feature = "dynamic")]
 mod python_fixture_tests {
+    use crate::common::fixture_harness::{
+        run_fixture_and_compare_to_golden, CopyStrategy, FixtureSpec,
+    };
     use nyx_scanner::commands::scan::Diag;
     use nyx_scanner::dynamic::verify::{verify_finding, VerifyOptions};
     use nyx_scanner::evidence::{
-        Confidence, Evidence, FlowStep, FlowStepKind, InconclusiveReason, UnsupportedReason,
-        VerifyStatus,
+        Confidence, Evidence, FlowStep, FlowStepKind, UnsupportedReason, VerifyStatus,
     };
     use nyx_scanner::labels::Cap;
     use nyx_scanner::patterns::{FindingCategory, Severity};
     use std::path::{Path, PathBuf};
-    use std::sync::Mutex;
     use tempfile::TempDir;
 
-    // Serialize all fixture tests to prevent races on process-global state
-    // (NYX_REPRO_BASE and NYX_TELEMETRY_PATH env vars).
-    static FIXTURE_LOCK: Mutex<()> = Mutex::new(());
-
-    /// Returns `true` if `python3` is available.
+    /// `python3` available on PATH? Tests that need an interpreter return
+    /// early with an `eprintln!` when this is false.
     fn python3_available() -> bool {
         std::process::Command::new("python3")
             .arg("--version")
@@ -39,337 +36,204 @@ mod python_fixture_tests {
             .unwrap_or(false)
     }
 
-    fn fixture_path(name: &str) -> PathBuf {
-        PathBuf::from(env!("CARGO_MANIFEST_DIR"))
-            .join("tests/dynamic_fixtures/python")
-            .join(name)
-    }
-
-    /// Run a fixture and return the verdict.
-    ///
-    /// Acquires `FIXTURE_LOCK` for the full duration to prevent races on the
-    /// process-global NYX_REPRO_BASE / NYX_TELEMETRY_PATH env vars.
-    /// `set_current_dir` is NOT used here: `harness::copy_entry_file` resolves
-    /// the entry file via its absolute path, so CWD is irrelevant.
-    fn run_fixture(fixture: &str, func: &str, cap: Cap, sink_line: u32) -> nyx_scanner::evidence::VerifyResult {
-        let _guard = FIXTURE_LOCK.lock().unwrap_or_else(|e| e.into_inner());
-
-        let path = fixture_path(fixture);
-        // Copy fixture to a temp dir so the harness can import it.
-        let tmp = TempDir::new().unwrap();
-        let dst = tmp.path().join(Path::new(fixture).file_name().unwrap());
-        std::fs::copy(&path, &dst).expect("fixture file must exist");
-
-        // Set up repro and telemetry to temp dirs to avoid side effects.
-        unsafe {
-            std::env::set_var("NYX_REPRO_BASE", tmp.path().join("repro").to_str().unwrap());
-            std::env::set_var("NYX_TELEMETRY_PATH", tmp.path().join("events.jsonl").to_str().unwrap());
+    fn spec(fixture: &'static str, func: &'static str, cap: Cap, sink_line: u32) -> FixtureSpec<'static> {
+        FixtureSpec {
+            lang_dir: "python",
+            fixture,
+            func,
+            cap,
+            sink_line,
+            confidence: Confidence::High,
+            copy: CopyStrategy::PreserveName,
         }
+    }
 
-        // Use the temp dir copy as the fixture path (absolute — no CWD change needed).
-        let diag = make_diag(&dst, func, cap, sink_line);
-
-        let opts = VerifyOptions::default();
-        let result = verify_finding(&diag, &opts);
-
-        unsafe {
-            std::env::remove_var("NYX_REPRO_BASE");
-            std::env::remove_var("NYX_TELEMETRY_PATH");
+    fn low_spec(
+        fixture: &'static str,
+        func: &'static str,
+        cap: Cap,
+        sink_line: u32,
+    ) -> FixtureSpec<'static> {
+        FixtureSpec {
+            lang_dir: "python",
+            fixture,
+            func,
+            cap,
+            sink_line,
+            confidence: Confidence::Low,
+            copy: CopyStrategy::PreserveName,
         }
-
-        result
     }
 
-    // ── SQLi fixtures ────────────────────────────────────────────────────────
+    // ── SQLi ─────────────────────────────────────────────────────────────────
 
     #[test]
-    fn sqli_positive_is_confirmed() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("sqli_positive.py", "login", Cap::SQL_QUERY, 17);
-        assert_eq!(
-            result.status, VerifyStatus::Confirmed,
-            "sqli_positive must be Confirmed; got {:?} (detail: {:?})",
-            result.status, result.detail
-        );
+    fn sqli_positive_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec("sqli_positive.py", "login", Cap::SQL_QUERY, 17));
     }
 
     #[test]
-    fn sqli_negative_is_not_confirmed() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("sqli_negative.py", "login", Cap::SQL_QUERY, 12);
-        assert_eq!(
-            result.status, VerifyStatus::NotConfirmed,
-            "sqli_negative must be NotConfirmed; got {:?}",
-            result.status
-        );
+    fn sqli_negative_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec("sqli_negative.py", "login", Cap::SQL_QUERY, 12));
     }
 
     #[test]
-    fn sqli_unsupported_is_unsupported() {
-        // Low-confidence Diag → Unsupported(ConfidenceTooLow) without execution.
-        let path = fixture_path("sqli_unsupported.py");
-        let mut d = make_diag(&path, "find_user", Cap::SQL_QUERY, 10);
-        d.confidence = Some(Confidence::Low);
-        let opts = VerifyOptions::default();
-        let result = verify_finding(&d, &opts);
-        assert_eq!(result.status, VerifyStatus::Unsupported);
-        assert_eq!(result.reason, Some(UnsupportedReason::ConfidenceTooLow));
+    fn sqli_unsupported_matches_golden() {
+        run_fixture_and_compare_to_golden(&low_spec(
+            "sqli_unsupported.py",
+            "find_user",
+            Cap::SQL_QUERY,
+            10,
+        ));
     }
 
     #[test]
-    fn sqli_adversarial_is_inconclusive_collision() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        // The adversarial fixture prints the oracle marker WITHOUT going through
-        // any SQL sink — so the oracle fires but the probe at the (nonexistent)
-        // SQL execute line does not.
-        // We point the sink line at a line that doesn't exist in the file (999)
-        // so the settrace probe can't fire.
-        let result = run_fixture("sqli_adversarial.py", "get_value", Cap::SQL_QUERY, 999);
-        // Oracle fires (prints "NYX_SQL_CONFIRMED") but probe doesn't (line 999 missing).
-        assert_eq!(
-            result.status, VerifyStatus::Inconclusive,
-            "sqli_adversarial must be Inconclusive; got {:?}",
-            result.status
-        );
-        assert_eq!(
-            result.inconclusive_reason,
-            Some(InconclusiveReason::OracleCollisionSuspected),
-            "adversarial must be OracleCollisionSuspected"
-        );
+    fn sqli_adversarial_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec("sqli_adversarial.py", "get_value", Cap::SQL_QUERY, 999));
     }
 
-    // ── Command injection fixtures ───────────────────────────────────────────
+    // ── Command injection ────────────────────────────────────────────────────
 
     #[test]
-    fn cmdi_positive_is_confirmed() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("cmdi_positive.py", "run_ping", Cap::CODE_EXEC, 13);
-        assert_eq!(
-            result.status, VerifyStatus::Confirmed,
-            "cmdi_positive must be Confirmed; got {:?} (detail: {:?})",
-            result.status, result.detail
-        );
+    fn cmdi_positive_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec("cmdi_positive.py", "run_ping", Cap::CODE_EXEC, 13));
     }
 
     #[test]
-    fn cmdi_negative_is_not_confirmed() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("cmdi_negative.py", "run_ping", Cap::CODE_EXEC, 17);
-        assert_eq!(
-            result.status, VerifyStatus::NotConfirmed,
-            "cmdi_negative must be NotConfirmed; got {:?}",
-            result.status
-        );
+    fn cmdi_negative_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec("cmdi_negative.py", "run_ping", Cap::CODE_EXEC, 17));
     }
 
     #[test]
-    fn cmdi_unsupported_is_unsupported() {
-        let path = fixture_path("cmdi_unsupported.py");
-        let mut d = make_diag(&path, "process_request", Cap::CODE_EXEC, 9);
-        d.confidence = Some(Confidence::Low);
-        let opts = VerifyOptions::default();
-        let result = verify_finding(&d, &opts);
-        assert_eq!(result.status, VerifyStatus::Unsupported);
-        assert_eq!(result.reason, Some(UnsupportedReason::ConfidenceTooLow));
+    fn cmdi_unsupported_matches_golden() {
+        run_fixture_and_compare_to_golden(&low_spec(
+            "cmdi_unsupported.py",
+            "process_request",
+            Cap::CODE_EXEC,
+            9,
+        ));
     }
 
     #[test]
-    fn cmdi_adversarial_is_inconclusive_collision() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("cmdi_adversarial.py", "process_input", Cap::CODE_EXEC, 999);
-        assert_eq!(result.status, VerifyStatus::Inconclusive);
-        assert_eq!(
-            result.inconclusive_reason,
-            Some(InconclusiveReason::OracleCollisionSuspected)
-        );
+    fn cmdi_adversarial_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec(
+            "cmdi_adversarial.py",
+            "process_input",
+            Cap::CODE_EXEC,
+            999,
+        ));
     }
 
-    // ── File I/O fixtures ────────────────────────────────────────────────────
+    // ── File I/O ─────────────────────────────────────────────────────────────
 
     #[test]
-    fn fileio_positive_is_confirmed() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("fileio_positive.py", "read_file", Cap::FILE_IO, 11);
-        assert_eq!(
-            result.status, VerifyStatus::Confirmed,
-            "fileio_positive must be Confirmed; got {:?} (detail: {:?})",
-            result.status, result.detail
-        );
+    fn fileio_positive_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec("fileio_positive.py", "read_file", Cap::FILE_IO, 11));
     }
 
     #[test]
-    fn fileio_negative_is_not_confirmed() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("fileio_negative.py", "read_file", Cap::FILE_IO, 18);
-        assert_eq!(
-            result.status, VerifyStatus::NotConfirmed,
-            "fileio_negative must be NotConfirmed; got {:?}",
-            result.status
-        );
+    fn fileio_negative_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec("fileio_negative.py", "read_file", Cap::FILE_IO, 18));
     }
 
     #[test]
-    fn fileio_unsupported_is_unsupported() {
-        let path = fixture_path("fileio_unsupported.py");
-        let mut d = make_diag(&path, "read_config", Cap::FILE_IO, 7);
-        d.confidence = Some(Confidence::Low);
-        let opts = VerifyOptions::default();
-        let result = verify_finding(&d, &opts);
-        assert_eq!(result.status, VerifyStatus::Unsupported);
-        assert_eq!(result.reason, Some(UnsupportedReason::ConfidenceTooLow));
+    fn fileio_unsupported_matches_golden() {
+        run_fixture_and_compare_to_golden(&low_spec(
+            "fileio_unsupported.py",
+            "read_config",
+            Cap::FILE_IO,
+            7,
+        ));
     }
 
     #[test]
-    fn fileio_adversarial_is_inconclusive_collision() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("fileio_adversarial.py", "read_file", Cap::FILE_IO, 999);
-        assert_eq!(result.status, VerifyStatus::Inconclusive);
-        assert_eq!(
-            result.inconclusive_reason,
-            Some(InconclusiveReason::OracleCollisionSuspected)
-        );
+    fn fileio_adversarial_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec("fileio_adversarial.py", "read_file", Cap::FILE_IO, 999));
     }
 
-    // ── SSRF fixtures ────────────────────────────────────────────────────────
+    // ── SSRF ─────────────────────────────────────────────────────────────────
 
     #[test]
-    fn ssrf_positive_is_confirmed() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("ssrf_positive.py", "fetch_url", Cap::SSRF, 11);
-        assert_eq!(
-            result.status, VerifyStatus::Confirmed,
-            "ssrf_positive must be Confirmed; got {:?} (detail: {:?})",
-            result.status, result.detail
-        );
+    fn ssrf_positive_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec("ssrf_positive.py", "fetch_url", Cap::SSRF, 11));
     }
 
     #[test]
-    fn ssrf_negative_is_not_confirmed() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("ssrf_negative.py", "fetch_url", Cap::SSRF, 26);
-        // Blocked by host validation — oracle won't fire.
-        assert_eq!(
-            result.status, VerifyStatus::NotConfirmed,
-            "ssrf_negative must be NotConfirmed; got {:?}",
-            result.status
-        );
+    fn ssrf_negative_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec("ssrf_negative.py", "fetch_url", Cap::SSRF, 26));
     }
 
     #[test]
-    fn ssrf_unsupported_is_unsupported() {
-        let path = fixture_path("ssrf_unsupported.py");
-        let mut d = make_diag(&path, "fetch", Cap::SSRF, 9);
-        d.confidence = Some(Confidence::Low);
-        let opts = VerifyOptions::default();
-        let result = verify_finding(&d, &opts);
-        assert_eq!(result.status, VerifyStatus::Unsupported);
-        assert_eq!(result.reason, Some(UnsupportedReason::ConfidenceTooLow));
+    fn ssrf_unsupported_matches_golden() {
+        run_fixture_and_compare_to_golden(&low_spec("ssrf_unsupported.py", "fetch", Cap::SSRF, 9));
     }
 
     #[test]
-    fn ssrf_adversarial_is_inconclusive_collision() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("ssrf_adversarial.py", "fetch_url", Cap::SSRF, 999);
-        assert_eq!(result.status, VerifyStatus::Inconclusive);
-        assert_eq!(
-            result.inconclusive_reason,
-            Some(InconclusiveReason::OracleCollisionSuspected)
-        );
+    fn ssrf_adversarial_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec("ssrf_adversarial.py", "fetch_url", Cap::SSRF, 999));
     }
 
-    // ── XSS fixtures ─────────────────────────────────────────────────────────
+    // ── XSS ──────────────────────────────────────────────────────────────────
 
     #[test]
-    fn xss_positive_is_confirmed() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("xss_positive.py", "render_comment", Cap::HTML_ESCAPE, 9);
-        assert_eq!(
-            result.status, VerifyStatus::Confirmed,
-            "xss_positive must be Confirmed; got {:?} (detail: {:?})",
-            result.status, result.detail
-        );
+    fn xss_positive_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec(
+            "xss_positive.py",
+            "render_comment",
+            Cap::HTML_ESCAPE,
+            9,
+        ));
     }
 
     #[test]
-    fn xss_negative_is_not_confirmed() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("xss_negative.py", "render_comment", Cap::HTML_ESCAPE, 11);
-        assert_eq!(
-            result.status, VerifyStatus::NotConfirmed,
-            "xss_negative must be NotConfirmed; got {:?}",
-            result.status
-        );
+    fn xss_negative_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec(
+            "xss_negative.py",
+            "render_comment",
+            Cap::HTML_ESCAPE,
+            11,
+        ));
     }
 
     #[test]
-    fn xss_unsupported_is_unsupported() {
-        let path = fixture_path("xss_unsupported.py");
-        let mut d = make_diag(&path, "render", Cap::HTML_ESCAPE, 7);
-        d.confidence = Some(Confidence::Low);
-        let opts = VerifyOptions::default();
-        let result = verify_finding(&d, &opts);
-        assert_eq!(result.status, VerifyStatus::Unsupported);
-        assert_eq!(result.reason, Some(UnsupportedReason::ConfidenceTooLow));
+    fn xss_unsupported_matches_golden() {
+        run_fixture_and_compare_to_golden(&low_spec(
+            "xss_unsupported.py",
+            "render",
+            Cap::HTML_ESCAPE,
+            7,
+        ));
     }
 
     #[test]
-    fn xss_adversarial_is_inconclusive_collision() {
-        if !python3_available() {
-            eprintln!("SKIP: python3 not available");
-            return;
-        }
-        let result = run_fixture("xss_adversarial.py", "render_comment", Cap::HTML_ESCAPE, 999);
-        assert_eq!(result.status, VerifyStatus::Inconclusive);
-        assert_eq!(
-            result.inconclusive_reason,
-            Some(InconclusiveReason::OracleCollisionSuspected)
-        );
+    fn xss_adversarial_matches_golden() {
+        if !python3_available() { eprintln!("SKIP: python3 not available"); return; }
+        run_fixture_and_compare_to_golden(&spec(
+            "xss_adversarial.py",
+            "render_comment",
+            Cap::HTML_ESCAPE,
+            999,
+        ));
     }
 
-    // ── Secrets fixture ───────────────────────────────────────────────────────
+    // ── Cross-cutting tests retained verbatim ────────────────────────────────
 
+    /// Telemetry must not contain literal secret strings from the fixture.
+    /// Independent of the golden contract: it inspects the side-channel.
     #[test]
     fn secret_not_in_telemetry_after_verify() {
         if !python3_available() {
@@ -377,7 +241,9 @@ mod python_fixture_tests {
             return;
         }
 
-        let _guard = FIXTURE_LOCK.lock().unwrap_or_else(|e| e.into_inner());
+        let _guard = crate::common::fixture_harness::FIXTURE_LOCK
+            .lock()
+            .unwrap_or_else(|e| e.into_inner());
 
         let tmp = TempDir::new().unwrap();
         let telemetry_path = tmp.path().join("events.jsonl");
@@ -391,15 +257,12 @@ mod python_fixture_tests {
         let tmp_fix = tmp.path().join("sqli_positive.py");
         let _ = std::fs::copy(&fixture, &tmp_fix);
 
-        // No set_current_dir: entry file is absolute, copy_entry_file resolves it directly.
         let diag = make_diag(&tmp_fix, "login", Cap::SQL_QUERY, 17);
         let opts = VerifyOptions::default();
         let _ = verify_finding(&diag, &opts);
 
-        // Check telemetry doesn't contain any secret patterns.
         if telemetry_path.exists() {
             let content = std::fs::read_to_string(&telemetry_path).unwrap_or_default();
-            // Telemetry must not contain the fake AWS key.
             assert!(
                 !content.contains("AKIAFAKETEST00000000"),
                 "telemetry must not contain fake AWS key; got: {content}"
@@ -412,15 +275,11 @@ mod python_fixture_tests {
         }
     }
 
-    // ── Mount-filter gate ─────────────────────────────────────────────────────
-
-    /// If the entry file itself matches a sensitive-file pattern (e.g. `id_rsa*`),
-    /// verify_finding must return Unsupported(RequiredFileRedactedForSecrets).
-    /// No Python3 needed — the check fires before harness execution.
+    /// Sensitive-filename gate fires before any harness execution; no
+    /// python3 needed.
     #[test]
     fn sensitive_entry_file_is_unsupported() {
         let tmp = TempDir::new().unwrap();
-        // "id_rsa.py" matches the id_rsa* sensitive pattern in mount_filter.
         let entry = tmp.path().join("id_rsa.py");
         std::fs::write(&entry, "def run(x): pass\n").unwrap();
 
@@ -428,12 +287,7 @@ mod python_fixture_tests {
         let opts = VerifyOptions::default();
         let result = verify_finding(&diag, &opts);
 
-        assert_eq!(
-            result.status,
-            VerifyStatus::Unsupported,
-            "sensitive entry file must be Unsupported; got {:?}",
-            result.status
-        );
+        assert_eq!(result.status, VerifyStatus::Unsupported);
         match &result.reason {
             Some(UnsupportedReason::RequiredFileRedactedForSecrets(_)) => {}
             other => panic!("expected RequiredFileRedactedForSecrets, got {other:?}"),
diff --git a/tests/rust_fixtures.rs b/tests/rust_fixtures.rs
index ad22eea1..0ae7d3e3 100644
--- a/tests/rust_fixtures.rs
+++ b/tests/rust_fixtures.rs
@@ -1,397 +1,225 @@
 //! Rust fixture integration tests (Phase 04 acceptance gate).
 //!
-//! Runs the dynamic verification pipeline against each Rust fixture and
-//! asserts the expected verdict. Requires `--features dynamic` and a
-//! working `cargo` toolchain on PATH.
+//! Each fixture is run through the dynamic verification pipeline; its
+//! verdict is then compared against the per-fixture golden under
+//! `tests/dynamic_fixtures/rust/{name}.golden.json`. Refresh the goldens
+//! via `NYX_UPDATE_GOLDENS=1 ./scripts/update_dynamic_goldens.sh`.
 //!
-//! Fixture entry points follow the convention:
-//!   `pub fn run(payload: &str)` in `tests/dynamic_fixtures/rust/{name}.rs`
-//!
-//! The harness emitter wraps each fixture in a generated `src/main.rs` that
-//! reads `NYX_PAYLOAD` from the environment and calls `entry::run(&payload)`.
-//!
-//! Build note: the first run per capability compiles a Cargo project; subsequent
-//! runs with differing entry files hit the build cache only when Cargo.toml and
-//! src/entry.rs are identical (the cache key includes the entry file hash).
-//! Expect 2-4 compilations per full test run (one per unique dependency set).
-//!
-//! Run with: `cargo nextest run --features dynamic --test rust_fixtures`
+//! Run with: `cargo nextest run --features dynamic --test rust_fixtures`.
+
+mod common;
 
 #[cfg(feature = "dynamic")]
 mod rust_fixture_tests {
+    use crate::common::fixture_harness::{
+        run_fixture_and_compare_to_golden, CopyStrategy, FixtureSpec,
+    };
     use nyx_scanner::commands::scan::Diag;
     use nyx_scanner::dynamic::verify::{verify_finding, VerifyOptions};
     use nyx_scanner::evidence::{
-        Confidence, Evidence, FlowStep, FlowStepKind, InconclusiveReason, UnsupportedReason,
-        VerifyStatus,
+        Confidence, Evidence, FlowStep, FlowStepKind,
     };
     use nyx_scanner::labels::Cap;
     use nyx_scanner::patterns::{FindingCategory, Severity};
     use std::path::{Path, PathBuf};
-    use std::sync::Mutex;
-    use tempfile::TempDir;
 
-    // Serialize all fixture tests: prevents races on process-global env vars
-    // (NYX_REPRO_BASE, NYX_TELEMETRY_PATH) and the shared build cache dir.
-    static FIXTURE_LOCK: Mutex<()> = Mutex::new(());
-
-    fn fixture_path(name: &str) -> PathBuf {
-        PathBuf::from(env!("CARGO_MANIFEST_DIR"))
-            .join("tests/dynamic_fixtures/rust")
-            .join(name)
+    fn spec(fixture: &'static str, func: &'static str, cap: Cap, sink_line: u32) -> FixtureSpec<'static> {
+        FixtureSpec {
+            lang_dir: "rust",
+            fixture,
+            func,
+            cap,
+            sink_line,
+            confidence: Confidence::High,
+            copy: CopyStrategy::RustEntry,
+        }
     }
 
-    /// Run a Rust fixture through the full dynamic verification pipeline.
-    ///
-    /// The fixture file is copied to a temp dir as `src/entry.rs`.
-    /// `NYX_REPRO_BASE` and `NYX_TELEMETRY_PATH` are redirected to temp dirs.
-    fn run_fixture(
-        fixture: &str,
-        func: &str,
+    fn low_spec(
+        fixture: &'static str,
+        func: &'static str,
         cap: Cap,
         sink_line: u32,
-    ) -> nyx_scanner::evidence::VerifyResult {
-        let _guard = FIXTURE_LOCK.lock().unwrap_or_else(|e| e.into_inner());
-
-        let path = fixture_path(fixture);
-
-        let tmp = TempDir::new().unwrap();
-        // Rust fixtures live at src/entry.rs inside the harness workdir;
-        // the Diag's entry_file points to the fixture source on disk.
-        let dst_dir = tmp.path().join("src");
-        std::fs::create_dir_all(&dst_dir).unwrap();
-        let dst = dst_dir.join("entry.rs");
-        std::fs::copy(&path, &dst).expect("fixture file must exist");
-
-        unsafe {
-            std::env::set_var("NYX_REPRO_BASE", tmp.path().join("repro").to_str().unwrap());
-            std::env::set_var(
-                "NYX_TELEMETRY_PATH",
-                tmp.path().join("events.jsonl").to_str().unwrap(),
-            );
+    ) -> FixtureSpec<'static> {
+        FixtureSpec {
+            lang_dir: "rust",
+            fixture,
+            func,
+            cap,
+            sink_line,
+            confidence: Confidence::Low,
+            copy: CopyStrategy::RustEntry,
         }
-
-        // Point the Diag at the original fixture path (absolute), not the copy.
-        // The harness emitter reads the file at entry_file to extract source.
-        let diag = make_diag(&path, func, cap, sink_line);
-
-        let opts = VerifyOptions::default();
-        let result = verify_finding(&diag, &opts);
-
-        unsafe {
-            std::env::remove_var("NYX_REPRO_BASE");
-            std::env::remove_var("NYX_TELEMETRY_PATH");
-        }
-
-        result
     }
 
-    // ── SQLi fixtures ────────────────────────────────────────────────────────
+    // ── SQLi ─────────────────────────────────────────────────────────────────
 
     #[test]
-    fn sqli_positive_is_confirmed() {
-        let result = run_fixture("sqli_positive.rs", "run", Cap::SQL_QUERY, 18);
-        assert_eq!(
-            result.status,
-            VerifyStatus::Confirmed,
-            "sqli_positive must be Confirmed; got {:?} (detail: {:?})",
-            result.status,
-            result.detail
-        );
-        assert!(
-            result.triggered_payload.is_some(),
-            "Confirmed result must have triggered_payload"
-        );
+    fn sqli_positive_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("sqli_positive.rs", "run", Cap::SQL_QUERY, 18));
     }
 
     #[test]
-    fn sqli_negative_is_not_confirmed() {
-        let result = run_fixture("sqli_negative.rs", "run", Cap::SQL_QUERY, 22);
-        assert_eq!(
-            result.status,
-            VerifyStatus::NotConfirmed,
-            "sqli_negative must be NotConfirmed; got {:?} (detail: {:?})",
-            result.status,
-            result.detail
-        );
+    fn sqli_negative_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("sqli_negative.rs", "run", Cap::SQL_QUERY, 22));
     }
 
     #[test]
-    fn sqli_unsupported_is_unsupported() {
-        let path = fixture_path("sqli_unsupported.rs");
-        let mut d = make_diag(&path, "find_user", Cap::SQL_QUERY, 10);
-        d.confidence = Some(Confidence::Low);
-        let opts = VerifyOptions::default();
-        let result = verify_finding(&d, &opts);
-        assert_eq!(result.status, VerifyStatus::Unsupported);
-        assert_eq!(result.reason, Some(UnsupportedReason::ConfidenceTooLow));
+    fn sqli_unsupported_matches_golden() {
+        run_fixture_and_compare_to_golden(&low_spec(
+            "sqli_unsupported.rs",
+            "find_user",
+            Cap::SQL_QUERY,
+            10,
+        ));
     }
 
     #[test]
-    fn sqli_adversarial_is_inconclusive_collision() {
-        // Adversarial prints oracle marker without __NYX_SINK_HIT__:
-        //   oracle_fired = true, sink_hit = false → OracleCollisionSuspected.
-        let result = run_fixture("sqli_adversarial.rs", "run", Cap::SQL_QUERY, 999);
-        assert_eq!(
-            result.status,
-            VerifyStatus::Inconclusive,
-            "sqli_adversarial must be Inconclusive; got {:?}",
-            result.status
-        );
-        assert_eq!(
-            result.inconclusive_reason,
-            Some(InconclusiveReason::OracleCollisionSuspected),
-            "adversarial must be OracleCollisionSuspected"
-        );
+    fn sqli_adversarial_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("sqli_adversarial.rs", "run", Cap::SQL_QUERY, 999));
     }
 
-    // ── Command injection fixtures ───────────────────────────────────────────
+    // ── Command injection ────────────────────────────────────────────────────
 
     #[test]
-    fn cmdi_positive_is_confirmed() {
-        let result = run_fixture("cmdi_positive.rs", "run", Cap::CODE_EXEC, 17);
-        assert_eq!(
-            result.status,
-            VerifyStatus::Confirmed,
-            "cmdi_positive must be Confirmed; got {:?} (detail: {:?})",
-            result.status,
-            result.detail
-        );
+    fn cmdi_positive_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("cmdi_positive.rs", "run", Cap::CODE_EXEC, 17));
     }
 
     #[test]
-    fn cmdi_negative_is_not_confirmed() {
-        let result = run_fixture("cmdi_negative.rs", "run", Cap::CODE_EXEC, 17);
-        assert_eq!(
-            result.status,
-            VerifyStatus::NotConfirmed,
-            "cmdi_negative must be NotConfirmed; got {:?}",
-            result.status
-        );
+    fn cmdi_negative_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("cmdi_negative.rs", "run", Cap::CODE_EXEC, 17));
     }
 
     #[test]
-    fn cmdi_unsupported_is_unsupported() {
-        let path = fixture_path("cmdi_unsupported.rs");
-        let mut d = make_diag(&path, "execute", Cap::CODE_EXEC, 9);
-        d.confidence = Some(Confidence::Low);
-        let opts = VerifyOptions::default();
-        let result = verify_finding(&d, &opts);
-        assert_eq!(result.status, VerifyStatus::Unsupported);
-        assert_eq!(result.reason, Some(UnsupportedReason::ConfidenceTooLow));
+    fn cmdi_unsupported_matches_golden() {
+        run_fixture_and_compare_to_golden(&low_spec(
+            "cmdi_unsupported.rs",
+            "execute",
+            Cap::CODE_EXEC,
+            9,
+        ));
     }
 
     #[test]
-    fn cmdi_adversarial_is_inconclusive_collision() {
-        let result = run_fixture("cmdi_adversarial.rs", "run", Cap::CODE_EXEC, 999);
-        assert_eq!(result.status, VerifyStatus::Inconclusive);
-        assert_eq!(
-            result.inconclusive_reason,
-            Some(InconclusiveReason::OracleCollisionSuspected)
-        );
+    fn cmdi_adversarial_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("cmdi_adversarial.rs", "run", Cap::CODE_EXEC, 999));
     }
 
-    // ── File I/O fixtures ────────────────────────────────────────────────────
+    // ── File I/O ─────────────────────────────────────────────────────────────
 
     #[test]
-    fn fileio_positive_is_confirmed() {
-        let result = run_fixture("fileio_positive.rs", "run", Cap::FILE_IO, 7);
-        assert_eq!(
-            result.status,
-            VerifyStatus::Confirmed,
-            "fileio_positive must be Confirmed; got {:?} (detail: {:?})",
-            result.status,
-            result.detail
-        );
+    fn fileio_positive_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("fileio_positive.rs", "run", Cap::FILE_IO, 7));
     }
 
     #[test]
-    fn fileio_negative_is_not_confirmed() {
-        let result = run_fixture("fileio_negative.rs", "run", Cap::FILE_IO, 17);
-        assert_eq!(
-            result.status,
-            VerifyStatus::NotConfirmed,
-            "fileio_negative must be NotConfirmed; got {:?}",
-            result.status
-        );
+    fn fileio_negative_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("fileio_negative.rs", "run", Cap::FILE_IO, 17));
     }
 
     #[test]
-    fn fileio_unsupported_is_unsupported() {
-        let path = fixture_path("fileio_unsupported.rs");
-        let mut d = make_diag(&path, "read", Cap::FILE_IO, 8);
-        d.confidence = Some(Confidence::Low);
-        let opts = VerifyOptions::default();
-        let result = verify_finding(&d, &opts);
-        assert_eq!(result.status, VerifyStatus::Unsupported);
-        assert_eq!(result.reason, Some(UnsupportedReason::ConfidenceTooLow));
+    fn fileio_unsupported_matches_golden() {
+        run_fixture_and_compare_to_golden(&low_spec(
+            "fileio_unsupported.rs",
+            "read",
+            Cap::FILE_IO,
+            8,
+        ));
     }
 
     #[test]
-    fn fileio_adversarial_is_inconclusive_collision() {
-        let result = run_fixture("fileio_adversarial.rs", "run", Cap::FILE_IO, 999);
-        assert_eq!(result.status, VerifyStatus::Inconclusive);
-        assert_eq!(
-            result.inconclusive_reason,
-            Some(InconclusiveReason::OracleCollisionSuspected)
-        );
+    fn fileio_adversarial_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("fileio_adversarial.rs", "run", Cap::FILE_IO, 999));
     }
 
-    // ── SSRF fixtures ────────────────────────────────────────────────────────
+    // ── SSRF ─────────────────────────────────────────────────────────────────
 
     #[test]
-    fn ssrf_positive_is_confirmed() {
-        let result = run_fixture("ssrf_positive.rs", "run", Cap::SSRF, 7);
-        assert_eq!(
-            result.status,
-            VerifyStatus::Confirmed,
-            "ssrf_positive must be Confirmed; got {:?} (detail: {:?})",
-            result.status,
-            result.detail
-        );
+    fn ssrf_positive_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("ssrf_positive.rs", "run", Cap::SSRF, 7));
     }
 
     #[test]
-    fn ssrf_negative_is_not_confirmed() {
-        let result = run_fixture("ssrf_negative.rs", "run", Cap::SSRF, 13);
-        assert_eq!(
-            result.status,
-            VerifyStatus::NotConfirmed,
-            "ssrf_negative must be NotConfirmed; got {:?}",
-            result.status
-        );
+    fn ssrf_negative_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("ssrf_negative.rs", "run", Cap::SSRF, 13));
     }
 
     #[test]
-    fn ssrf_unsupported_is_unsupported() {
-        let path = fixture_path("ssrf_unsupported.rs");
-        let mut d = make_diag(&path, "get", Cap::SSRF, 8);
-        d.confidence = Some(Confidence::Low);
-        let opts = VerifyOptions::default();
-        let result = verify_finding(&d, &opts);
-        assert_eq!(result.status, VerifyStatus::Unsupported);
-        assert_eq!(result.reason, Some(UnsupportedReason::ConfidenceTooLow));
+    fn ssrf_unsupported_matches_golden() {
+        run_fixture_and_compare_to_golden(&low_spec("ssrf_unsupported.rs", "get", Cap::SSRF, 8));
     }
 
     #[test]
-    fn ssrf_adversarial_is_inconclusive_collision() {
-        let result = run_fixture("ssrf_adversarial.rs", "run", Cap::SSRF, 999);
-        assert_eq!(result.status, VerifyStatus::Inconclusive);
-        assert_eq!(
-            result.inconclusive_reason,
-            Some(InconclusiveReason::OracleCollisionSuspected)
-        );
+    fn ssrf_adversarial_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("ssrf_adversarial.rs", "run", Cap::SSRF, 999));
     }
 
-    // ── XSS fixtures ─────────────────────────────────────────────────────────
+    // ── XSS ──────────────────────────────────────────────────────────────────
 
     #[test]
-    fn xss_positive_is_confirmed() {
-        let result = run_fixture("xss_positive.rs", "run", Cap::HTML_ESCAPE, 11);
-        assert_eq!(
-            result.status,
-            VerifyStatus::Confirmed,
-            "xss_positive must be Confirmed; got {:?} (detail: {:?})",
-            result.status,
-            result.detail
-        );
-        assert!(
-            result.triggered_payload.is_some(),
-            "Confirmed result must have triggered_payload"
-        );
+    fn xss_positive_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("xss_positive.rs", "run", Cap::HTML_ESCAPE, 11));
     }
 
     #[test]
-    fn xss_negative_is_not_confirmed() {
-        let result = run_fixture("xss_negative.rs", "run", Cap::HTML_ESCAPE, 15);
-        assert_eq!(
-            result.status,
-            VerifyStatus::NotConfirmed,
-            "xss_negative must be NotConfirmed; got {:?} (detail: {:?})",
-            result.status,
-            result.detail
-        );
+    fn xss_negative_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("xss_negative.rs", "run", Cap::HTML_ESCAPE, 15));
     }
 
     #[test]
-    fn xss_unsupported_is_unsupported() {
-        let path = fixture_path("xss_unsupported.rs");
-        let mut d = make_diag(&path, "render", Cap::HTML_ESCAPE, 14);
-        d.confidence = Some(Confidence::Low);
-        let opts = VerifyOptions::default();
-        let result = verify_finding(&d, &opts);
-        assert_eq!(result.status, VerifyStatus::Unsupported);
-        assert_eq!(result.reason, Some(UnsupportedReason::ConfidenceTooLow));
+    fn xss_unsupported_matches_golden() {
+        run_fixture_and_compare_to_golden(&low_spec(
+            "xss_unsupported.rs",
+            "render",
+            Cap::HTML_ESCAPE,
+            14,
+        ));
     }
 
     #[test]
-    fn xss_adversarial_is_inconclusive_collision() {
-        let result = run_fixture("xss_adversarial.rs", "run", Cap::HTML_ESCAPE, 999);
-        assert_eq!(
-            result.status,
-            VerifyStatus::Inconclusive,
-            "xss_adversarial must be Inconclusive; got {:?}",
-            result.status
-        );
-        assert_eq!(
-            result.inconclusive_reason,
-            Some(InconclusiveReason::OracleCollisionSuspected),
-            "adversarial must be OracleCollisionSuspected"
-        );
+    fn xss_adversarial_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec(
+            "xss_adversarial.rs",
+            "run",
+            Cap::HTML_ESCAPE,
+            999,
+        ));
     }
 
-    // ── Variant fixtures (smoke-test second positive paths) ──────────────────
+    // ── Smoke-test second positive paths ─────────────────────────────────────
 
     #[test]
-    fn cmdi_positive2_is_confirmed() {
-        let result = run_fixture("cmdi_positive2.rs", "run", Cap::CODE_EXEC, 17);
-        assert_eq!(
-            result.status,
-            VerifyStatus::Confirmed,
-            "cmdi_positive2 must be Confirmed; got {:?} (detail: {:?})",
-            result.status,
-            result.detail
-        );
+    fn cmdi_positive2_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("cmdi_positive2.rs", "run", Cap::CODE_EXEC, 17));
     }
 
     #[test]
-    fn fileio_positive2_is_confirmed() {
-        let result = run_fixture("fileio_positive2.rs", "run", Cap::FILE_IO, 11);
-        assert_eq!(
-            result.status,
-            VerifyStatus::Confirmed,
-            "fileio_positive2 must be Confirmed; got {:?} (detail: {:?})",
-            result.status,
-            result.detail
-        );
+    fn fileio_positive2_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("fileio_positive2.rs", "run", Cap::FILE_IO, 11));
     }
 
     #[test]
-    fn ssrf_positive2_is_confirmed() {
-        let result = run_fixture("ssrf_positive2.rs", "run", Cap::SSRF, 7);
-        assert_eq!(
-            result.status,
-            VerifyStatus::Confirmed,
-            "ssrf_positive2 must be Confirmed; got {:?} (detail: {:?})",
-            result.status,
-            result.detail
-        );
+    fn ssrf_positive2_matches_golden() {
+        run_fixture_and_compare_to_golden(&spec("ssrf_positive2.rs", "run", Cap::SSRF, 7));
     }
 
-    // ── Harness architecture: non-Python-specific gate ───────────────────────
+    // ── Pipeline non-panic gate ──────────────────────────────────────────────
 
-    /// Rust fixture must produce a VerifyResult (not panic or ICE).
-    /// This is the Phase 04 acceptance gate: the dynamic pipeline handles
-    /// a compiled-language finding without Python-specific assumptions.
+    /// Confirms the Rust pipeline produces a VerifyResult (not a panic/ICE).
+    /// Independent of the golden contract: this is a structural assertion.
     #[test]
     fn rust_pipeline_does_not_panic() {
-        let result = run_fixture("sqli_positive.rs", "run", Cap::SQL_QUERY, 18);
-        // Any verdict is acceptable; the test asserts non-panic only.
-        let _ = result;
+        let _guard = crate::common::fixture_harness::FIXTURE_LOCK
+            .lock()
+            .unwrap_or_else(|e| e.into_inner());
+        let path = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+            .join("tests/dynamic_fixtures/rust/sqli_positive.rs");
+        let diag = make_diag(&path, "run", Cap::SQL_QUERY, 18);
+        let opts = VerifyOptions::default();
+        let _ = verify_finding(&diag, &opts);
     }
 
-    // ── Helpers ─────────────────────────────────────────────────────────────
-
     fn make_diag(path: &Path, func: &str, cap: Cap, sink_line: u32) -> Diag {
         let path_str = path.to_string_lossy().into_owned();
         let evidence = Evidence {