diff --git a/.github/scripts/extract_spec_diff.py b/.github/scripts/extract_spec_diff.py
new file mode 100644
index 0000000..9e1dcde
--- /dev/null
+++ b/.github/scripts/extract_spec_diff.py
@@ -0,0 +1,236 @@
+#!/usr/bin/env python3
+"""Diff two OpenAPI specs; classify each change as breaking or non-breaking.
+
+Emits a JSON list of changes. Operations are keyed by operationId (falling back
+to "<METHOD> <path>"); schemas by name (properties as "Schema.prop"). Used by the
+spec-drift-detector workflow in both PR mode (git refs) and scheduled mode (files).
+
+Zero runtime dependencies beyond pyyaml.
+"""
+import argparse
+import json
+import subprocess
+from pathlib import Path
+
+import yaml
+
+METHODS = {"get", "post", "put", "patch", "delete", "head", "options"}
+
+
+def load(text: str) -> dict:
+    return yaml.safe_load(text) or {}
+
+
+def git_show(ref: str, path: str) -> str:
+    """File contents at a git ref, or '' if absent on that side (new/deleted file)."""
+    try:
+        return subprocess.run(
+            ["git", "show", f"{ref}:{path}"], capture_output=True, text=True, check=True
+        ).stdout
+    except subprocess.CalledProcessError:
+        return ""
+
+
+def operations(spec: dict) -> dict:
+    """{op_key: {method, path, op}} for every paths.<path>.<method>."""
+    out = {}
+    for path, methods in (spec.get("paths") or {}).items():
+        if not isinstance(methods, dict):
+            continue
+        for m, op in methods.items():
+            if m.lower() not in METHODS or not isinstance(op, dict):
+                continue
+            key = op.get("operationId") or f"{m.upper()} {path}"
+            out[key] = {"method": m.upper(), "path": path, "op": op}
+    return out
+
+
+def params(op: dict) -> dict:
+    out = {}
+    for p in op.get("parameters") or []:
+        if isinstance(p, dict) and "name" in p:
+            out[(p["name"], p.get("in", ""))] = p
+    return out
+
+
+def schemas(spec: dict) -> dict:
+    return ((spec.get("components") or {}).get("schemas")) or {}
+
+
+def _type(d):
+    if not isinstance(d, dict):
+        return None
+    s = d.get("schema", d)
+    if not isinstance(s, dict):
+        return None
+    return s.get("type") or s.get("$ref")
+
+
+def _fmt(d):
+    """The `format` qualifier (e.g. int32, uuid) of a parameter/property schema."""
+    if not isinstance(d, dict):
+        return None
+    s = d.get("schema", d)
+    if not isinstance(s, dict):
+        return None
+    return s.get("format")
+
+
+def diff_operations(base: dict, head: dict) -> list[dict]:
+    changes = []
+    bo, ho = operations(base), operations(head)
+    for k in bo.keys() - ho.keys():
+        changes.append({"kind": "operation", "id": k, "change": "removed", "breaking": True,
+                        "before": f"{bo[k]['method']} {bo[k]['path']}", "after": "",
+                        "detail": "operation removed"})
+    for k in ho.keys() - bo.keys():
+        changes.append({"kind": "operation", "id": k, "change": "added", "breaking": False,
+                        "before": "", "after": f"{ho[k]['method']} {ho[k]['path']}",
+                        "detail": "operation added"})
+    for k in bo.keys() & ho.keys():
+        changes += diff_one_op(k, bo[k]["op"], ho[k]["op"])
+    return changes
+
+
+def diff_one_op(key: str, b: dict, h: dict) -> list[dict]:
+    changes = []
+    bp, hp = params(b), params(h)
+
+    # Parameter location changes (e.g. query -> path): a pure relocation otherwise
+    # shows up as a misleading remove + add. Detect by name and report once, breaking.
+    b_loc, h_loc = {}, {}
+    for nm, loc in bp:
+        b_loc.setdefault(nm, set()).add(loc)
+    for nm, loc in hp:
+        h_loc.setdefault(nm, set()).add(loc)
+    relocated = set()
+    for nm in b_loc.keys() & h_loc.keys():
+        if b_loc[nm] != h_loc[nm] and len(b_loc[nm]) == 1 and len(h_loc[nm]) == 1:
+            relocated.add(nm)
+            bl, hl = next(iter(b_loc[nm])), next(iter(h_loc[nm]))
+            changes.append({"kind": "operation", "id": key, "change": "modified", "breaking": True,
+                            "before": f"{nm} in {bl}", "after": f"{nm} in {hl}",
+                            "detail": f"parameter '{nm}' moved from {bl} to {hl}"})
+
+    for name in bp.keys() - hp.keys():
+        if name[0] in relocated:
+            continue
+        req = bool(bp[name].get("required"))
+        changes.append({"kind": "operation", "id": key, "change": "modified", "breaking": req,
+                        "before": f"param {name[0]}", "after": "",
+                        "detail": f"{'required ' if req else ''}parameter '{name[0]}' removed"})
+    for name in hp.keys() - bp.keys():
+        if name[0] in relocated:
+            continue
+        req = bool(hp[name].get("required"))
+        changes.append({"kind": "operation", "id": key, "change": "modified", "breaking": req,
+                        "before": "", "after": f"param {name[0]}",
+                        "detail": f"{'required ' if req else ''}parameter '{name[0]}' added"})
+    for name in bp.keys() & hp.keys():
+        pb, ph = bp[name], hp[name]
+        if not pb.get("required") and ph.get("required"):
+            changes.append({"kind": "operation", "id": key, "change": "modified", "breaking": True,
+                            "before": f"{name[0]} optional", "after": f"{name[0]} required",
+                            "detail": f"parameter '{name[0]}' now required"})
+        if _type(pb) != _type(ph):
+            changes.append({"kind": "operation", "id": key, "change": "modified", "breaking": True,
+                            "before": str(_type(pb)), "after": str(_type(ph)),
+                            "detail": f"parameter '{name[0]}' type changed"})
+        if _fmt(pb) != _fmt(ph):
+            changes.append({"kind": "operation", "id": key, "change": "modified", "breaking": True,
+                            "before": str(_fmt(pb)), "after": str(_fmt(ph)),
+                            "detail": f"parameter '{name[0]}' format changed"})
+
+    # Removed response codes: consumers may branch on them, so removal is breaking.
+    br = {str(c) for c in (b.get("responses") or {})}
+    hr = {str(c) for c in (h.get("responses") or {})}
+    for code in br - hr:
+        changes.append({"kind": "operation", "id": key, "change": "modified", "breaking": True,
+                        "before": f"response {code}", "after": "",
+                        "detail": f"response '{code}' removed"})
+    return changes
+
+
+def diff_schemas(base: dict, head: dict) -> list[dict]:
+    changes = []
+    bs, hs = schemas(base), schemas(head)
+    for name in bs.keys() - hs.keys():
+        changes.append({"kind": "schema", "id": name, "change": "removed", "breaking": True,
+                        "before": name, "after": "", "detail": "schema removed"})
+    for name in hs.keys() - bs.keys():
+        changes.append({"kind": "schema", "id": name, "change": "added", "breaking": False,
+                        "before": "", "after": name, "detail": "schema added"})
+    for name in bs.keys() & hs.keys():
+        changes += diff_one_schema(name, bs[name], hs[name])
+    return changes
+
+
+def diff_one_schema(name: str, b: dict, h: dict) -> list[dict]:
+    changes = []
+    bp = b.get("properties") or {}
+    hp = h.get("properties") or {}
+    breq, hreq = set(b.get("required") or []), set(h.get("required") or [])
+    for prop in bp.keys() - hp.keys():
+        changes.append({"kind": "schema", "id": f"{name}.{prop}", "change": "removed", "breaking": True,
+                        "before": prop, "after": "", "detail": f"property '{prop}' removed"})
+    for prop in hp.keys() - bp.keys():
+        newreq = prop in hreq
+        changes.append({"kind": "schema", "id": f"{name}.{prop}", "change": "added", "breaking": newreq,
+                        "before": "", "after": prop,
+                        "detail": f"{'required ' if newreq else ''}property '{prop}' added"})
+    for prop in bp.keys() & hp.keys():
+        if prop not in breq and prop in hreq:
+            changes.append({"kind": "schema", "id": f"{name}.{prop}", "change": "modified", "breaking": True,
+                            "before": "optional", "after": "required",
+                            "detail": f"property '{prop}' now required"})
+        if _type(bp[prop]) != _type(hp[prop]):
+            changes.append({"kind": "schema", "id": f"{name}.{prop}", "change": "modified", "breaking": True,
+                            "before": str(_type(bp[prop])), "after": str(_type(hp[prop])),
+                            "detail": f"property '{prop}' type changed"})
+        if _fmt(bp[prop]) != _fmt(hp[prop]):
+            changes.append({"kind": "schema", "id": f"{name}.{prop}", "change": "modified", "breaking": True,
+                            "before": str(_fmt(bp[prop])), "after": str(_fmt(hp[prop])),
+                            "detail": f"property '{prop}' format changed"})
+        be = set(bp[prop].get("enum") or []) if isinstance(bp[prop], dict) else set()
+        he = set(hp[prop].get("enum") or []) if isinstance(hp[prop], dict) else set()
+        for removed in be - he:
+            changes.append({"kind": "schema", "id": f"{name}.{prop}", "change": "modified", "breaking": True,
+                            "before": str(removed), "after": "",
+                            "detail": f"enum value '{removed}' removed from '{prop}'"})
+    return changes
+
+
+def diff(base: dict, head: dict) -> list[dict]:
+    return diff_operations(base, head) + diff_schemas(base, head)
+
+
+def main():
+    ap = argparse.ArgumentParser(description="Diff two OpenAPI specs.")
+    ap.add_argument("--base", help="Base spec file path")
+    ap.add_argument("--head", help="Head spec file path")
+    ap.add_argument("--base-ref", help="Base git ref (use with --path)")
+    ap.add_argument("--head-ref", help="Head git ref (use with --path)")
+    ap.add_argument("--path", help="Repo-relative spec path for git-ref mode")
+    ap.add_argument("--service", default="")
+    ap.add_argument("--version", default="")
+    ap.add_argument("--output", default="spec-diff.json")
+    a = ap.parse_args()
+
+    if a.base_ref is not None and a.path:
+        base = load(git_show(a.base_ref, a.path))
+        head = load(git_show(a.head_ref, a.path))
+    else:
+        base = load(Path(a.base).read_text()) if a.base and Path(a.base).exists() else {}
+        head = load(Path(a.head).read_text()) if a.head and Path(a.head).exists() else {}
+
+    changes = diff(base, head)
+    for c in changes:
+        c["service"] = a.service
+        c["version"] = a.version
+    Path(a.output).write_text(json.dumps(changes, indent=2))
+    nb = sum(1 for c in changes if c["breaking"])
+    print(f"{len(changes)} changes ({nb} breaking) -> {a.output}")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/.github/scripts/tests/test_extract_spec_diff.py b/.github/scripts/tests/test_extract_spec_diff.py
new file mode 100644
index 0000000..de40025
--- /dev/null
+++ b/.github/scripts/tests/test_extract_spec_diff.py
@@ -0,0 +1,107 @@
+"""Unit tests for extract_spec_diff. Run: pytest .github/scripts/tests -v
+(add .github/scripts to sys.path or run from there)."""
+import os
+import subprocess
+import sys
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
+from extract_spec_diff import diff_operations, diff_one_op, diff_schemas  # noqa: E402
+
+
+def test_operation_added_and_removed():
+    base = {"paths": {"/indexes": {"get": {"operationId": "list_indexes"},
+                                    "post": {"operationId": "create_index"}}}}
+    head = {"paths": {"/indexes": {"get": {"operationId": "list_indexes"}},
+                      "/indexes/{name}": {"delete": {"operationId": "delete_index"}}}}
+    by = {(c["id"], c["change"]): c for c in diff_operations(base, head)}
+    assert by[("create_index", "removed")]["breaking"] is True
+    assert by[("delete_index", "added")]["breaking"] is False
+
+
+def test_parameter_breaking_rules():
+    b = {"parameters": [{"name": "limit", "in": "query", "schema": {"type": "integer"}}]}
+    h = {"parameters": [
+        {"name": "limit", "in": "query", "schema": {"type": "string"}},
+        {"name": "namespace", "in": "query", "required": True, "schema": {"type": "string"}},
+    ]}
+    details = {c["detail"]: c["breaking"] for c in diff_one_op("op", b, h)}
+    assert details["parameter 'limit' type changed"] is True
+    assert details["required parameter 'namespace' added"] is True
+
+
+def test_optional_param_added_is_not_breaking():
+    b = {"parameters": []}
+    h = {"parameters": [{"name": "filter", "in": "query", "schema": {"type": "string"}}]}
+    c = diff_one_op("op", b, h)[0]
+    assert c["detail"] == "parameter 'filter' added"
+    assert c["breaking"] is False
+
+
+def test_param_format_change_is_breaking():
+    b = {"parameters": [{"name": "id", "in": "query", "schema": {"type": "integer", "format": "int32"}}]}
+    h = {"parameters": [{"name": "id", "in": "query", "schema": {"type": "integer", "format": "int64"}}]}
+    details = {c["detail"]: c["breaking"] for c in diff_one_op("op", b, h)}
+    assert details["parameter 'id' format changed"] is True
+    assert "parameter 'id' type changed" not in details  # type unchanged, only format
+
+
+def test_param_location_change_reported_once_as_breaking():
+    b = {"parameters": [{"name": "name", "in": "query", "required": True, "schema": {"type": "string"}}]}
+    h = {"parameters": [{"name": "name", "in": "path", "required": True, "schema": {"type": "string"}}]}
+    out = diff_one_op("op", b, h)
+    details = {c["detail"]: c["breaking"] for c in out}
+    assert details["parameter 'name' moved from query to path"] is True
+    # the relocation must NOT also surface as a remove + add
+    assert not any("removed" in d or "added" in d for d in details)
+
+
+def test_removed_response_code_is_breaking():
+    b = {"responses": {"200": {}, "404": {}}}
+    h = {"responses": {"200": {}}}
+    details = {c["detail"]: c["breaking"] for c in diff_one_op("op", b, h)}
+    assert details["response '404' removed"] is True
+
+
+def test_added_response_code_is_not_flagged():
+    b = {"responses": {"200": {}}}
+    h = {"responses": {"200": {}, "429": {}}}
+    assert all("response" not in c["detail"] for c in diff_one_op("op", b, h))
+
+
+def test_schema_property_format_change_is_breaking():
+    base = {"components": {"schemas": {"M": {"properties": {"ts": {"type": "string", "format": "date"}}}}}}
+    head = {"components": {"schemas": {"M": {"properties": {"ts": {"type": "string", "format": "date-time"}}}}}}
+    d = {c["detail"]: c["breaking"] for c in diff_schemas(base, head)}
+    assert d["property 'ts' format changed"] is True
+
+
+def test_schema_breaking_rules():
+    base = {"components": {"schemas": {"Index": {
+        "properties": {"name": {"type": "string"},
+                       "metric": {"type": "string", "enum": ["cosine", "dotproduct"]}},
+        "required": ["name"]}}}}
+    head = {"components": {"schemas": {"Index": {
+        "properties": {"metric": {"type": "integer", "enum": ["cosine"]},
+                       "host": {"type": "string"}},
+        "required": ["host"]}}}}
+    d = {c["detail"]: c["breaking"] for c in diff_schemas(base, head)}
+    assert d["property 'name' removed"] is True
+    assert d["required property 'host' added"] is True
+    assert d["property 'metric' type changed"] is True
+    assert d["enum value 'dotproduct' removed from 'metric'"] is True
+
+
+def test_cli_on_files(tmp_path):
+    import json
+    base = tmp_path / "base.yaml"
+    head = tmp_path / "head.yaml"
+    out = tmp_path / "diff.json"
+    base.write_text("paths:\n  /x:\n    get:\n      operationId: getx\n")
+    head.write_text("paths: {}\n")
+    script = os.path.join(os.path.dirname(__file__), "..", "extract_spec_diff.py")
+    r = subprocess.run([sys.executable, script, "--base", str(base), "--head", str(head),
+                        "--service", "db_data", "--version", "2025-10", "--output", str(out)],
+                       capture_output=True, text=True)
+    assert r.returncode == 0, r.stderr
+    changes = json.loads(out.read_text())
+    assert any(c["id"] == "getx" and c["change"] == "removed" and c["service"] == "db_data" for c in changes)
diff --git a/.github/spec-manifest.json b/.github/spec-manifest.json
new file mode 100644
index 0000000..615e4b1
--- /dev/null
+++ b/.github/spec-manifest.json
@@ -0,0 +1,39 @@
+{
+  "_comment": "Maps pinecone-api operationIds (and schema names) to the docs.pinecone.io guide pages and SDKs they surface. Edit when operations/schemas are added or pages renamed. Changed surface absent here is written to spec-gaps-unmapped.json on each run — tend that file to keep this current.",
+  "docs_base_url": "https://docs.pinecone.io",
+  "operations": {
+    "create_index": {"docs": ["guides/index-data/create-an-index"], "sdks": ["python", "ts", "go", "java"]},
+    "create_index_for_model": {"docs": ["guides/index-data/create-an-index", "guides/get-started/quickstart"], "sdks": ["python", "ts", "go", "java"]},
+    "list_indexes": {"docs": ["guides/manage-data/manage-indexes"], "sdks": ["python", "ts", "go", "java"]},
+    "describe_index": {"docs": ["guides/manage-data/manage-indexes"], "sdks": ["python", "ts", "go", "java"]},
+    "configure_index": {"docs": ["guides/manage-data/manage-indexes"], "sdks": ["python", "ts", "go", "java"]},
+    "delete_index": {"docs": ["guides/manage-data/manage-indexes"], "sdks": ["python", "ts", "go", "java"]},
+    "upsertVectors": {"docs": ["guides/index-data/upsert-data"], "sdks": ["python", "ts", "go", "java"]},
+    "upsertRecordsNamespace": {"docs": ["guides/index-data/upsert-data", "guides/get-started/quickstart"], "sdks": ["python", "ts"]},
+    "searchRecordsNamespace": {"docs": ["guides/search/search-overview", "guides/get-started/quickstart"], "sdks": ["python", "ts"]},
+    "queryVectors": {"docs": ["guides/search/search-overview"], "sdks": ["python", "ts", "go", "java"]},
+    "fetchVectors": {"docs": ["guides/manage-data/fetch-data"], "sdks": ["python", "ts", "go", "java"]},
+    "updateVector": {"docs": ["guides/manage-data/update-data"], "sdks": ["python", "ts", "go", "java"]},
+    "deleteVectors": {"docs": ["guides/manage-data/delete-data"], "sdks": ["python", "ts", "go", "java"]},
+    "listVectors": {"docs": ["guides/manage-data/list-record-ids"], "sdks": ["python", "ts", "go", "java"]},
+    "describeIndexStats": {"docs": ["guides/manage-data/manage-indexes"], "sdks": ["python", "ts", "go", "java"]},
+    "startBulkImport": {"docs": ["guides/index-data/import-data"], "sdks": ["python", "ts"]},
+    "describeBulkImport": {"docs": ["guides/index-data/import-data"], "sdks": ["python", "ts"]},
+    "listBulkImports": {"docs": ["guides/index-data/import-data"], "sdks": ["python", "ts"]},
+    "cancelBulkImport": {"docs": ["guides/index-data/import-data"], "sdks": ["python", "ts"]},
+    "create_backup": {"docs": ["guides/manage-data/back-up-an-index"], "sdks": ["python", "ts", "go", "java"]},
+    "create_index_from_backup_operation": {"docs": ["guides/manage-data/restore-an-index"], "sdks": ["python", "ts", "go", "java"]},
+    "create_collection": {"docs": ["guides/manage-data/manage-collections"], "sdks": ["python", "ts", "go", "java"]},
+    "createNamespace": {"docs": ["guides/manage-data/manage-namespaces"], "sdks": ["python", "ts", "go", "java"]},
+    "deleteNamespace": {"docs": ["guides/manage-data/manage-namespaces"], "sdks": ["python", "ts", "go", "java"]},
+    "embed": {"docs": ["guides/inference/generate-embeddings"], "sdks": ["python", "ts", "go", "java"]},
+    "rerank": {"docs": ["guides/search/rerank-results"], "sdks": ["python", "ts", "go", "java"]},
+    "list_models": {"docs": ["guides/inference/understanding-inference"], "sdks": ["python", "ts"]},
+    "get_model": {"docs": ["guides/inference/understanding-inference"], "sdks": ["python", "ts"]}
+  },
+  "schemas": {
+    "IndexModel": {"docs": ["guides/index-data/create-an-index"], "sdks": ["python", "ts", "go", "java"]},
+    "CreateIndexForModelRequest": {"docs": ["guides/index-data/create-an-index"], "sdks": ["python", "ts"]},
+    "SearchRecordsRequest": {"docs": ["guides/search/search-overview"], "sdks": ["python", "ts"]}
+  }
+}