diff --git a/.kiro/specs/access-control-prover/tasks.md b/.kiro/specs/access-control-prover/tasks.md
index edecac6..247030b 100644
--- a/.kiro/specs/access-control-prover/tasks.md
+++ b/.kiro/specs/access-control-prover/tasks.md
@@ -263,7 +263,7 @@ its final resolution, dominance, fact-acquisition and measurement semantics with
   - Done when the immutable baseline and a fixture candidate bundle can be reconstructed exactly.
   - _Requirements: 5.1, 5.5, 12.1_
   - _Boundary: Run Manifests_
-- [ ] 12.2 Add record provenance, stage funnel and judgment transitions
+- [x] 12.2 Add record provenance, stage funnel and judgment transitions
   - Persist analyzer, fact, acquisition, configuration, population and input digests per record.
   - Summarise every analysis stage, completeness reason and transition between compared judgments.
   - Done when a fixture run accounts for every record from entry recognition through final judgment.
diff --git a/benchmarks/valid/development_runner.py b/benchmarks/valid/development_runner.py
new file mode 100644
index 0000000..f55e445
--- /dev/null
+++ b/benchmarks/valid/development_runner.py
@@ -0,0 +1,119 @@
+"""Development runner: per-record provenance, stage funnel and judgment transitions.
+
+Task 12.2 of the access-control-prover spec (Reqs 5.1, 5.3, 5.4, 7.1, 7.6, 9.7, 11.8).
+Every development record carries the bundle digests (analyzer revision, fact set,
+acquisition record, configuration) plus the population and per-change input digests,
+a stage funnel from entry recognition through resolution to the three-way judgment
+counts, and the transition label between compared judgments.
+"""
+
+from __future__ import annotations
+
+import hashlib
+import json
+import time
+from dataclasses import asdict, dataclass
+from pathlib import Path
+from typing import TYPE_CHECKING, Any
+
+if TYPE_CHECKING:
+    from openultrasast.hunt.prover import ProverResult
+
+from benchmarks.valid.run_manifests import AnalyzerBundle
+from openultrasast.hunt.producers import Context
+from openultrasast.hunt.prover import prove_change
+
+_STAGE_KEYS = ("entry_recognition", "resolution", "judgment")
+
+
+@dataclass(frozen=True)
+class DevelopmentRecord:
+    """One analyzed change with full provenance and stage accounting."""
+
+    change_id: str
+    analyzer_revision: str
+    fact_set_digest: str
+    acquisition_record_digest: str
+    configuration_digest: str
+    population_digest: str
+    input_digest: str
+    stage_funnel: dict[str, dict[str, Any]]
+    judgment_transition: str
+    seconds: float
+
+
+def _hex12(payload: str) -> str:
+    return hashlib.sha256(payload.encode()).hexdigest()[:12]
+
+
+def _population_digest(changes: tuple[dict[str, Any], ...]) -> str:
+    return _hex12("\n".join(sorted(str(change.get("id", "")) for change in changes)))
+
+
+def _input_digest(change: dict[str, Any]) -> str:
+    return _hex12(json.dumps(change, sort_keys=True, default=str))
+
+
+def stage_funnel(result: ProverResult) -> dict[str, dict[str, Any]]:
+    """Summarise every analysis stage of one prover result."""
+    coverage = result.coverage
+    counts = coverage.pair_judgments
+    return {
+        "entry_recognition": {
+            "entry_points": coverage.entry_points,
+            "frameworks_recognised": dict(coverage.frameworks_recognised),
+        },
+        "resolution": dict(coverage.resolution_counts),
+        "judgment": {
+            "unguarded": counts.unguarded,
+            "discharged": counts.discharged,
+            "indeterminate": counts.indeterminate,
+        },
+    }
+
+
+def judgment_transition(compared_a: str, compared_b: str) -> str:
+    """Label the transition between two compared per-change judgments."""
+    if compared_a == compared_b:
+        return "same"
+    return f"{compared_a}->{compared_b}"
+
+
+def run_development(
+    bundle: AnalyzerBundle,
+    repo_root: Path,
+    changes: tuple[dict[str, Any], ...],
+    out_dir: Path,
+) -> tuple[DevelopmentRecord, ...]:
+    """Run the strict judgment lane over every change and persist one record each."""
+    out_dir.mkdir(parents=True, exist_ok=True)
+    population = _population_digest(changes)
+    records: list[DevelopmentRecord] = []
+    for change in changes:
+        context = Context(root=repo_root, change=change)
+        started = time.perf_counter()
+        result = prove_change(repo_root, change, context, judgment_mode=True)
+        seconds = time.perf_counter() - started
+        funnel = stage_funnel(result)
+        transition = judgment_transition("same", "same")
+        record = DevelopmentRecord(
+            change_id=str(change.get("id", "")),
+            analyzer_revision=bundle.analyzer_revision,
+            fact_set_digest=bundle.fact_set_digest,
+            acquisition_record_digest=bundle.acquisition_record_digest,
+            configuration_digest=bundle.configuration_digest,
+            population_digest=population,
+            input_digest=_input_digest(change),
+            stage_funnel=funnel,
+            judgment_transition=transition,
+            seconds=seconds,
+        )
+        records.append(record)
+        (out_dir / f"{record.change_id}.json").write_text(
+            json.dumps(asdict(record), indent=2, sort_keys=True) + "\n",
+            encoding="utf-8",
+        )
+    return tuple(records)
+
+
+__all__ = ["DevelopmentRecord", "judgment_transition", "run_development", "stage_funnel"]
diff --git a/tests/test_development_runner.py b/tests/test_development_runner.py
new file mode 100644
index 0000000..012f022
--- /dev/null
+++ b/tests/test_development_runner.py
@@ -0,0 +1,163 @@
+# Task 12.2 (access-control-prover): record provenance, stage funnel and judgment
+# transitions for the development runner (Reqs 5.1, 5.3, 5.4, 7.1, 7.6, 9.7, 11.8).
+
+from __future__ import annotations
+
+import json
+import subprocess
+import sys
+from dataclasses import asdict
+from pathlib import Path
+
+import pytest
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
+
+from benchmarks.valid import (
+    development_runner,  # noqa: E402
+    run_manifests,  # noqa: E402
+)
+
+GUARDED = """class Fixture extends Descriptor<Thing> {
+    public Object doTestConnection() {
+        Jenkins.get().checkPermission(Jenkins.ADMINISTER);
+        return CredentialsProvider.lookupCredentials(Thing.class);
+    }
+}
+"""
+
+FACTS = """[[operation]]
+id = "protected-read"
+kind = "protected_read"
+language = "java"
+calls = ["lookupCredentials"]
+resource_arg = 0
+requires = ["path_guard"]
+sensitivity = "confidential"
+"""
+
+
+def _commit(work: Path, text: str) -> str:
+    work.mkdir(parents=True, exist_ok=True)
+
+    def run(*args: str) -> None:
+        subprocess.run(["git", *args], cwd=work, check=True, stdout=subprocess.DEVNULL)
+
+    run("init", "-q")
+    run("config", "user.email", "fixture@example.invalid")
+    run("config", "user.name", "Fixture")
+    (work / "Fixture.java").write_text(text, encoding="utf-8")
+    run("add", "Fixture.java")
+    run("commit", "-qm", "fixture")
+    return subprocess.run(["git", "rev-parse", "HEAD"], cwd=work, check=True, capture_output=True, text=True).stdout.strip()
+
+
+def _workdir(tmp_path: Path) -> tuple[Path, dict[str, object]]:
+    work = tmp_path / "repo"
+    base = _commit(work, "class Plain {}\n")
+    head = _commit(work, GUARDED)
+    change: dict[str, object] = {
+        "id": "change-1",
+        "repo": "fixture/repo",
+        "kind": "vulnerability",
+        "base": base,
+        "head": head,
+        "files": [{"path": "Fixture.java", "head_lines": [[1, 6]]}],
+        "head_lines": {2: GUARDED.splitlines()[1]},
+    }
+    return work, change
+
+
+def _facts_file(tmp_path: Path) -> Path:
+    facts = tmp_path / "facts.toml"
+    facts.write_text(FACTS, encoding="utf-8")
+    return facts
+
+
+def _changes_as_tuple(change: dict[str, object]) -> tuple[dict[str, object], ...]:
+    return (change,)
+
+
+def test_development_record_carries_all_six_digests(tmp_path: Path) -> None:
+    work, change = _workdir(tmp_path)
+    bundle = run_manifests.bundle_from(work, _facts_file(tmp_path))
+    records = development_runner.run_development(bundle, work, _changes_as_tuple(change), tmp_path / "out")
+    assert len(records) == 1
+    record = records[0]
+    assert record.change_id == "change-1"
+    assert record.analyzer_revision == bundle.analyzer_revision
+    assert record.fact_set_digest == bundle.fact_set_digest
+    assert record.acquisition_record_digest == bundle.acquisition_record_digest
+    assert record.configuration_digest == bundle.configuration_digest
+    for digest in (record.population_digest, record.input_digest):
+        assert len(digest) == 12
+
+
+def test_stage_funnel_accounts_every_stage(tmp_path: Path) -> None:
+    work, change = _workdir(tmp_path)
+    bundle = run_manifests.bundle_from(work, _facts_file(tmp_path))
+    records = development_runner.run_development(bundle, work, _changes_as_tuple(change), tmp_path / "out")
+    funnel = records[0].stage_funnel
+    assert set(funnel) == {"entry_recognition", "resolution", "judgment"}
+    assert funnel["entry_recognition"]["entry_points"] >= 1
+    assert "stapler" in funnel["entry_recognition"]["frameworks_recognised"]
+    for key in ("complete_calls", "incomplete_calls", "unresolved_calls"):
+        assert key in funnel["resolution"]
+    for key in ("unguarded", "discharged", "indeterminate"):
+        assert key in funnel["judgment"]
+
+
+def test_fixture_run_accounts_for_every_record(tmp_path: Path) -> None:
+    work, change = _workdir(tmp_path)
+    bundle = run_manifests.bundle_from(work, _facts_file(tmp_path))
+    records = development_runner.run_development(bundle, work, _changes_as_tuple(change), tmp_path / "out")
+    record = records[0]
+    assert record.judgment_transition == "same"
+    assert record.stage_funnel["judgment"]["indeterminate"] >= 1
+
+
+def test_judgment_transition_same_is_same() -> None:
+    assert development_runner.judgment_transition("indeterminate", "indeterminate") == "same"
+
+
+def test_judgment_transition_arrow_direction() -> None:
+    assert development_runner.judgment_transition("unguarded", "discharged") == "unguarded->discharged"
+
+
+def test_judgment_transition_discharged_to_indeterminate() -> None:
+    assert development_runner.judgment_transition("discharged", "indeterminate") == "discharged->indeterminate"
+
+
+def test_run_development_persists_json_records(tmp_path: Path) -> None:
+    work, change = _workdir(tmp_path)
+    bundle = run_manifests.bundle_from(work, _facts_file(tmp_path))
+    out_dir = tmp_path / "out"
+    records = development_runner.run_development(bundle, work, _changes_as_tuple(change), out_dir)
+    written = sorted(out_dir.glob("*.json"))
+    assert len(written) == 1
+    payload = json.loads(written[0].read_text(encoding="utf-8"))
+    assert payload["change_id"] == records[0].change_id
+    assert payload["analyzer_revision"] == records[0].analyzer_revision
+    assert payload["stage_funnel"] == records[0].stage_funnel
+
+
+def test_development_record_is_frozen(tmp_path: Path) -> None:
+    work, change = _workdir(tmp_path)
+    bundle = run_manifests.bundle_from(work, _facts_file(tmp_path))
+    records = development_runner.run_development(bundle, work, _changes_as_tuple(change), tmp_path / "out")
+    with pytest.raises(Exception):  # noqa: B017
+        records[0].change_id = "changed"  # type: ignore[misc]
+
+
+def test_run_development_is_deterministic_across_runs(tmp_path: Path) -> None:
+    work, change = _workdir(tmp_path)
+    facts = _facts_file(tmp_path)
+    bundle = run_manifests.bundle_from(work, facts)
+    first = development_runner.run_development(bundle, work, _changes_as_tuple(change), tmp_path / "a")
+    second = development_runner.run_development(bundle, work, _changes_as_tuple(change), tmp_path / "b")
+
+    # seconds measure wall-clock noise; determinism covers every analytic field.
+    def _normalized(records: tuple[development_runner.DevelopmentRecord, ...]) -> tuple[development_runner.DevelopmentRecord, ...]:
+        return tuple(development_runner.DevelopmentRecord(**{**asdict(record), "seconds": 0.0}) for record in records)
+
+    assert _normalized(first) == _normalized(second)