diff --git a/bin/bitbucket-client b/bin/bitbucket-client
index fe30ff5f..551e92be 100755
--- a/bin/bitbucket-client
+++ b/bin/bitbucket-client
@@ -20,6 +20,13 @@ Commands:
     get-readme --ref <ref>
     get-pull-request-template --ref <ref>
     get-file-url <path> <sha> [--start-line <n>] [--end-line <n>]
+    get-commit <sha>
+    get-commit-changes <sha> [--cursor <cursor>] [--per-page <n>]
+    get-commits [--ref <ref>] [--cursor <cursor>] [--per-page <n>]
+    get-commits-by-path <path> [--ref <ref>] [--cursor <cursor>] [--per-page <n>]
+    get-commit-url <sha>
+    get-commits-url <sha> [--file-path <path>] [--since YYYY-MM-DD] [--until YYYY-MM-DD]
+    compare-commits <start_sha> <end_sha> [--include-behind]
 """
 
 import argparse
@@ -28,11 +35,19 @@ import logging
 import os
 import pathlib
 import sys
+from datetime import date
 
 from scm import Secret
 from scm.manager import SourceCodeManager
 from scm.types import (
+    CompareCommitsProtocol,
     GetAppInstallationProtocol,
+    GetCommitChangesProtocol,
+    GetCommitProtocol,
+    GetCommitsByPathProtocol,
+    GetCommitsProtocol,
+    GetCommitsUrlProtocol,
+    GetCommitUrlProtocol,
     GetDirectoryContentsProtocol,
     GetFileContentProtocol,
     GetFileUrlProtocol,
@@ -40,6 +55,7 @@ from scm.types import (
     GetPullRequestTemplateProtocol,
     GetReadmeProtocol,
     GetRepositoryProtocol,
+    PaginationParams,
 )
 
 logger = logging.getLogger(__name__)
@@ -49,6 +65,20 @@ def dump(obj):
     logger.info(json.dumps(obj, indent=2, default=str))
 
 
+def pagination_args(args) -> PaginationParams | None:
+    pagination: PaginationParams = {}
+    if args.cursor is not None:
+        pagination["cursor"] = args.cursor
+    if args.per_page is not None:
+        pagination["per_page"] = args.per_page
+    return pagination or None
+
+
+def add_pagination(p: argparse.ArgumentParser) -> None:
+    p.add_argument("--cursor", default=None)
+    p.add_argument("--per-page", type=int, default=None)
+
+
 def load_credentials() -> dict[str, str]:
     """Load KEY=VALUE pairs from .credentials, skipping blanks and comments."""
     creds: dict[str, str] = {}
@@ -104,6 +134,35 @@ def main():
     p.add_argument("sha")
     p.add_argument("--start-line", type=int, default=None)
     p.add_argument("--end-line", type=int, default=None)
+    p = sub.add_parser("get-commit")
+    p.add_argument("sha")
+
+    p = sub.add_parser("get-commit-changes")
+    p.add_argument("sha")
+    add_pagination(p)
+
+    p = sub.add_parser("get-commits")
+    p.add_argument("--ref", default=None)
+    add_pagination(p)
+
+    p = sub.add_parser("get-commits-by-path")
+    p.add_argument("path")
+    p.add_argument("--ref", default=None)
+    add_pagination(p)
+
+    p = sub.add_parser("get-commit-url")
+    p.add_argument("sha")
+
+    p = sub.add_parser("get-commits-url")
+    p.add_argument("sha")
+    p.add_argument("--file-path", default=None)
+    p.add_argument("--since", type=date.fromisoformat, default=None)
+    p.add_argument("--until", type=date.fromisoformat, default=None)
+
+    p = sub.add_parser("compare-commits")
+    p.add_argument("start_sha")
+    p.add_argument("end_sha")
+    p.add_argument("--include-behind", action="store_true", dest="include_behind")
 
     args = parser.parse_args()
     if not args.command:
@@ -153,6 +212,34 @@ def main():
         assert isinstance(scm, GetFileUrlProtocol)
         dump(scm.get_file_url(args.path, args.sha, start_line=args.start_line, end_line=args.end_line))
 
+    elif args.command == "get-commit":
+        assert isinstance(scm, GetCommitProtocol)
+        dump(scm.get_commit(args.sha))
+
+    elif args.command == "get-commit-changes":
+        assert isinstance(scm, GetCommitChangesProtocol)
+        dump(scm.get_commit_changes(args.sha, pagination=pagination_args(args)))
+
+    elif args.command == "get-commits":
+        assert isinstance(scm, GetCommitsProtocol)
+        dump(scm.get_commits(ref=args.ref, pagination=pagination_args(args)))
+
+    elif args.command == "get-commits-by-path":
+        assert isinstance(scm, GetCommitsByPathProtocol)
+        dump(scm.get_commits_by_path(args.path, ref=args.ref, pagination=pagination_args(args)))
+
+    elif args.command == "get-commit-url":
+        assert isinstance(scm, GetCommitUrlProtocol)
+        dump(scm.get_commit_url(args.sha))
+
+    elif args.command == "get-commits-url":
+        assert isinstance(scm, GetCommitsUrlProtocol)
+        dump(scm.get_commits_url(args.sha, file_path=args.file_path, since=args.since, until=args.until))
+
+    elif args.command == "compare-commits":
+        assert isinstance(scm, CompareCommitsProtocol)
+        dump(scm.compare_commits(args.start_sha, args.end_sha, include_behind=args.include_behind))
+
 
 if __name__ == "__main__":
     logging.basicConfig(level=logging.DEBUG)
diff --git a/src/scm/providers/bitbucket/provider.py b/src/scm/providers/bitbucket/provider.py
index 5f5e8bc1..a12e2809 100644
--- a/src/scm/providers/bitbucket/provider.py
+++ b/src/scm/providers/bitbucket/provider.py
@@ -1,6 +1,8 @@
 import base64
 import hashlib
+import re
 from collections.abc import Callable, Iterator
+from datetime import UTC, date, datetime
 from typing import Any
 from urllib.parse import parse_qs, quote, unquote, urlparse
 
@@ -21,9 +23,15 @@
     ActionResult,
     ApiClient,
     AppInstallation,
+    Commit,
+    CommitAuthor,
+    CommitComparison,
+    CommitFile,
+    CommitWithChanges,
     CredentialsSet,
     FileContent,
     FileContentType,
+    FileStatus,
     GitRemote,
     GitRepository,
     PaginatedActionResult,
@@ -64,6 +72,13 @@
 PULL_REQUEST_TEMPLATE_PARENT_DIRS = (".github", "", "docs")
 PULL_REQUEST_TEMPLATE_FILENAME = "pull_request_template.md"
 PULL_REQUEST_TEMPLATE_DIRNAME = "pull_request_template"
+_FILE_STATUSES: dict[str, FileStatus] = {
+    "added": "added",
+    "removed": "removed",
+    "modified": "modified",
+    "renamed": "renamed",
+}
+_RAW_AUTHOR = re.compile(r"^(?P<name>.*?)\s*<(?P<email>[^>]*)>\s*$")
 
 
 class BitbucketProvider:
@@ -287,6 +302,167 @@ def _resolve_ref(self, ref: str, request_options: RequestOptions | None) -> str:
     def _src_path(self, commit: str, path: str) -> str:
         return f"/2.0/repositories/{self.repository_path}/src/{quote(commit, safe='')}/{quote(path.strip('/'))}"
 
+    def get_commit_url(self, commit_sha: SHA) -> str:
+        return f"{self._web_base_url}/{self.repository_path}/commits/{commit_sha}"
+
+    def get_commits_url(
+        self,
+        commit_sha: SHA,
+        *,
+        file_path: str | None = None,
+        since: date | None = None,
+        until: date | None = None,
+    ) -> str:
+        """Link to a file's history at the commit, or else the repository's commits page.
+
+        Bitbucket's history pages take no dates, and its commits page can't start at a commit.
+        """
+        if file_path is None:
+            return f"{self._web_base_url}/{self.repository_path}/commits"
+        return f"{self._web_base_url}/{self.repository_path}/history-node/{commit_sha}/{quote(file_path)}"
+
+    def get_commit(
+        self,
+        sha: SHA,
+        request_options: RequestOptions | None = None,
+    ) -> ActionResult[CommitWithChanges]:
+        """Return a commit with its first page of changed files."""
+        response = self.get(f"/2.0/repositories/{self.repository_path}/commit/{sha}", request_options=request_options)
+        changes = self.get_commit_changes(sha, {"per_page": MAX_PAGE_SIZE}, request_options)
+        files = changes["data"]
+        complete = changes["meta"]["next_cursor"] is None
+        additions = sum(f["additions"] or 0 for f in files) if complete else None
+        deletions = sum(f["deletions"] or 0 for f in files) if complete else None
+        return map_action(response, lambda raw: CommitWithChanges(**map_commit(raw, additions, deletions), files=files))
+
+    def get_commit_changes(
+        self,
+        sha: SHA,
+        pagination: PaginationParams | None = None,
+        request_options: RequestOptions | None = None,
+    ) -> PaginatedActionResult[list[CommitFile]]:
+        """Read one page of a diffstat, with each file's patch cut from the full diff."""
+        # Filtering the diff by the page's paths fails: Bitbucket rejects query strings over about 4KB.
+        repository_api = f"/2.0/repositories/{self.repository_path}"
+        response = self.get(f"{repository_api}/diffstat/{sha}", pagination=pagination, request_options=request_options)
+        patches = split_patches(self.get(f"{repository_api}/diff/{sha}", request_options=request_options).text)
+        return map_paginated_action(response, lambda raw: map_commit_file(raw, patches))
+
+    def get_commits(
+        self,
+        ref: str | None = None,
+        pagination: PaginationParams | None = None,
+        since: datetime | None = None,
+        until: datetime | None = None,
+        request_options: RequestOptions | None = None,
+    ) -> PaginatedActionResult[list[Commit]]:
+        return self._get_commits(ref, {}, pagination, since, until, request_options)
+
+    def get_commits_by_path(
+        self,
+        path: str,
+        ref: str | None = None,
+        pagination: PaginationParams | None = None,
+        since: datetime | None = None,
+        until: datetime | None = None,
+        request_options: RequestOptions | None = None,
+    ) -> PaginatedActionResult[list[Commit]]:
+        return self._get_commits(ref, {"path": path}, pagination, since, until, request_options)
+
+    def compare_commits(
+        self,
+        start_sha: SHA,
+        end_sha: SHA,
+        pagination: PaginationParams | None = None,
+        request_options: RequestOptions | None = None,
+        *,
+        include_behind: bool = False,
+    ) -> PaginatedActionResult[CommitComparison]:
+        """Compare two commits against their merge base.
+
+        Bitbucket returns no counts, so they're the length of a commit list and cap at one page.
+        `behind_by` takes a second request and is only counted when the commits aren't paged.
+        """
+        if include_behind and pagination is not None:
+            raise ResourceBadRequest(
+                detail="'include_behind' cannot be combined with 'pagination': 'ahead_by' would count one page "
+                "while 'behind_by' counts the whole range.",
+            )
+        commits_path = f"/2.0/repositories/{self.repository_path}/commits"
+        response = self.get(
+            commits_path,
+            params={"include": end_sha, "exclude": start_sha},
+            pagination=pagination or {"per_page": MAX_PAGE_SIZE},
+            request_options=request_options,
+        )
+        raw = response.json()
+        commits = [map_commit(commit) for commit in raw["values"]]
+        # A range spec diffs the first commit against the merge base, so the head goes first.
+        spec = f"{end_sha}..{start_sha}"
+        repository_api = f"/2.0/repositories/{self.repository_path}"
+        patches = split_patches(self.get(f"{repository_api}/diff/{spec}", request_options=request_options).text)
+        diffstats = list(
+            iter_all_pages(
+                lambda page: map_paginated_action(
+                    self.get(f"{repository_api}/diffstat/{spec}", pagination=page, request_options=request_options),
+                    lambda file: map_commit_file(file, patches),
+                ),
+                per_page=MAX_PAGE_SIZE,
+            )
+        )
+        diff = [file for page in diffstats for file in page["data"]]
+        comparison = CommitComparison(ahead_by=len(commits), commits=commits, diff=diff)
+        if pagination is None:
+            behind = self.get(
+                commits_path,
+                params={"include": start_sha, "exclude": end_sha},
+                pagination={"per_page": MAX_PAGE_SIZE},
+                request_options=request_options,
+            )
+            comparison["behind_by"] = len(behind.json()["values"])
+        return {
+            "data": comparison,
+            "type": PROVIDER_TYPE,
+            "raw": {
+                "data": {**raw, "diffstat": [file for page in diffstats for file in page["raw"]["data"]["values"]]},
+                "headers": dict(response.headers),
+            },
+            "meta": {"next_cursor": next_cursor(raw)},
+        }
+
+    def _get_commits(
+        self,
+        ref: str | None,
+        params: dict[str, str],
+        pagination: PaginationParams | None,
+        since: datetime | None,
+        until: datetime | None,
+        request_options: RequestOptions | None,
+    ) -> PaginatedActionResult[list[Commit]]:
+        # Without a revision Bitbucket lists commits on every branch; HEAD is the main branch.
+        revision = quote(ref or "HEAD", safe="/")
+        while True:
+            response = self.get(
+                f"/2.0/repositories/{self.repository_path}/commits/{revision}",
+                params=params,
+                pagination=pagination,
+                request_options=request_options,
+            )
+            result = map_paginated_action(response, map_commit)
+            if since is None and until is None:
+                return result
+            # Commits aren't strictly date-ordered, so only a page that's entirely past `since` ends the walk.
+            # Bitbucket's commit `date` is the committer date; the API has no author date.
+            dates = [datetime.fromisoformat(raw["date"]) for raw in result["raw"]["data"].get("values", [])]
+            start, end = as_utc(since or datetime.min), as_utc(until or datetime.max)
+            result["data"] = [commit for commit, d in zip(result["data"], dates, strict=True) if start <= d <= end]
+            if dates and all(d < start for d in dates):
+                result["meta"]["next_cursor"] = None
+            # Callers stop at an empty page, so skip the ones that only hold commits after `until`.
+            if result["data"] or not (cursor := result["meta"]["next_cursor"]):
+                return result
+            pagination = {**(pagination or {}), "cursor": cursor}
+
 
 def parse_scopes(header: str) -> set[str]:
     return {scope.strip() for scope in header.split(",") if scope.strip()}
@@ -353,6 +529,52 @@ def map_directory_entry(raw: dict[str, Any]) -> FileContent:
     )
 
 
+def map_commit_author(raw: dict[str, Any], raw_date: str) -> CommitAuthor:
+    """Parse the git author, which is a raw `Name <email>` string whether or not it links to a Bitbucket user."""
+    if match := _RAW_AUTHOR.match(raw["raw"]):
+        name, email = match["name"], match["email"]
+    else:
+        name, email = raw["raw"], ""
+    return CommitAuthor(name=name, email=email, date=datetime.fromisoformat(raw_date))
+
+
+def as_utc(value: datetime) -> datetime:
+    return value if value.tzinfo else value.replace(tzinfo=UTC)
+
+
+def map_commit(raw: dict[str, Any], additions: int | None = None, deletions: int | None = None) -> Commit:
+    return Commit(
+        id=raw["hash"],
+        message=raw["message"],
+        author=map_commit_author(raw["author"], raw["date"]),
+        additions=additions,
+        deletions=deletions,
+    )
+
+
+def map_commit_file(raw: dict[str, Any], patches: dict[str, str]) -> CommitFile:
+    old, new = raw["old"], raw["new"]
+    filename = (new or old)["path"]
+    return CommitFile(
+        filename=filename,
+        status=_FILE_STATUSES.get(raw["status"], "unknown"),
+        patch=patches.get(filename),
+        additions=raw["lines_added"],
+        deletions=raw["lines_removed"],
+        previous_filename=old["path"] if raw["status"] == "renamed" else None,
+    )
+
+
+def split_patches(diff: str) -> dict[str, str]:
+    """Split a unified diff into each file's hunks, keyed by the file's new path."""
+    patches = {}
+    for section in re.split(r"^(?=diff --git )", diff, flags=re.MULTILINE):
+        header, _, body = section.partition("\n")
+        if header and (hunks := re.search(r"^@@", body, flags=re.MULTILINE)):
+            patches[header.rpartition(" b/")[2]] = body[hunks.start() :]
+    return patches
+
+
 def next_cursor(raw: dict[str, Any]) -> str | None:
     """Read the `page` value out of the `next` link, which is a page number or an opaque token."""
     if not (next_url := raw.get("next")):
diff --git a/tests/unit/provider/fixtures/bitbucket/commit.json b/tests/unit/provider/fixtures/bitbucket/commit.json
new file mode 100644
index 00000000..eb6ab591
--- /dev/null
+++ b/tests/unit/provider/fixtures/bitbucket/commit.json
@@ -0,0 +1,95 @@
+{
+  "body": {
+    "author": {
+      "raw": "Test User <test@example.com>",
+      "type": "author",
+      "user": {
+        "account_id": "557058:00000000-0000-0000-0000-000000000001",
+        "display_name": "Test User",
+        "links": {
+          "avatar": {
+            "href": "https://avatar.example.com/test-user.png"
+          }
+        },
+        "nickname": "test-user",
+        "type": "user",
+        "uuid": "{00000000-0000-0000-0000-000000000001}"
+      }
+    },
+    "date": "2026-11-05T20:16:34+00:00",
+    "hash": "e723f15089c22737bb51aee8db06e0eab91e4ba1",
+    "links": {
+      "approve": {
+        "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1/approve"
+      },
+      "comments": {
+        "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1/comments"
+      },
+      "diff": {
+        "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/diff/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+      },
+      "html": {
+        "href": "https://bitbucket.org/test-workspace/test-repo/commits/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+      },
+      "patch": {
+        "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/patch/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+      },
+      "self": {
+        "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+      },
+      "statuses": {
+        "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1/statuses"
+      }
+    },
+    "message": "Rename, remove, add and change files\n",
+    "parents": [
+      {
+        "hash": "a682892aa0f4502ef7a242f75d72d0b41eaa27b9",
+        "links": {
+          "html": {
+            "href": "https://bitbucket.org/test-workspace/test-repo/commits/a682892aa0f4502ef7a242f75d72d0b41eaa27b9"
+          },
+          "self": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/a682892aa0f4502ef7a242f75d72d0b41eaa27b9"
+          }
+        },
+        "type": "commit"
+      }
+    ],
+    "participants": [],
+    "rendered": {
+      "message": {
+        "html": "<p>Rename, remove, add and change files</p>",
+        "markup": "markdown",
+        "raw": "Rename, remove, add and change files\n",
+        "type": "rendered"
+      }
+    },
+    "repository": {
+      "full_name": "test-workspace/test-repo",
+      "links": {
+        "avatar": {
+          "href": "https://bytebucket.org/ravatar/%7B06cc78f5-9826-41c4-9bac-b4f44ca67ef4%7D?ts=default"
+        },
+        "html": {
+          "href": "https://bitbucket.org/test-workspace/test-repo"
+        },
+        "self": {
+          "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo"
+        }
+      },
+      "name": "test-repo",
+      "type": "repository",
+      "uuid": "{06cc78f5-9826-41c4-9bac-b4f44ca67ef4}"
+    },
+    "summary": {
+      "html": "<p>Rename, remove, add and change files</p>",
+      "markup": "markdown",
+      "raw": "Rename, remove, add and change files\n",
+      "type": "rendered"
+    },
+    "type": "commit"
+  },
+  "headers": {},
+  "status": 200
+}
diff --git a/tests/unit/provider/fixtures/bitbucket/commit_not_found.json b/tests/unit/provider/fixtures/bitbucket/commit_not_found.json
new file mode 100644
index 00000000..be3a6c39
--- /dev/null
+++ b/tests/unit/provider/fixtures/bitbucket/commit_not_found.json
@@ -0,0 +1,20 @@
+{
+  "body": {
+    "data": {
+      "shas": [
+        "deadbeef"
+      ]
+    },
+    "error": {
+      "data": {
+        "shas": [
+          "deadbeef"
+        ]
+      },
+      "message": "Commit not found"
+    },
+    "type": "error"
+  },
+  "headers": {},
+  "status": 404
+}
diff --git a/tests/unit/provider/fixtures/bitbucket/commits_by_path_page_1.json b/tests/unit/provider/fixtures/bitbucket/commits_by_path_page_1.json
new file mode 100644
index 00000000..63e13a8a
--- /dev/null
+++ b/tests/unit/provider/fixtures/bitbucket/commits_by_path_page_1.json
@@ -0,0 +1,102 @@
+{
+  "body": {
+    "next": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commits/s4-commits?path=src%2Ftest_app%2Fmath.py&pagelen=1&page=2",
+    "page": 1,
+    "pagelen": 1,
+    "size": 2,
+    "values": [
+      {
+        "author": {
+          "raw": "Test User <test@example.com>",
+          "type": "author",
+          "user": {
+            "account_id": "557058:00000000-0000-0000-0000-000000000001",
+            "display_name": "Test User",
+            "links": {
+              "avatar": {
+                "href": "https://avatar.example.com/test-user.png"
+              }
+            },
+            "nickname": "test-user",
+            "type": "user",
+            "uuid": "{00000000-0000-0000-0000-000000000001}"
+          }
+        },
+        "date": "2026-11-05T20:16:34+00:00",
+        "hash": "e723f15089c22737bb51aee8db06e0eab91e4ba1",
+        "links": {
+          "approve": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1/approve"
+          },
+          "comments": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1/comments"
+          },
+          "diff": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/diff/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+          },
+          "html": {
+            "href": "https://bitbucket.org/test-workspace/test-repo/commits/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+          },
+          "patch": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/patch/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+          },
+          "self": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+          },
+          "statuses": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1/statuses"
+          }
+        },
+        "message": "Rename, remove, add and change files\n",
+        "parents": [
+          {
+            "hash": "a682892aa0f4502ef7a242f75d72d0b41eaa27b9",
+            "links": {
+              "html": {
+                "href": "https://bitbucket.org/test-workspace/test-repo/commits/a682892aa0f4502ef7a242f75d72d0b41eaa27b9"
+              },
+              "self": {
+                "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/a682892aa0f4502ef7a242f75d72d0b41eaa27b9"
+              }
+            },
+            "type": "commit"
+          }
+        ],
+        "rendered": {
+          "message": {
+            "html": "<p>Rename, remove, add and change files</p>",
+            "markup": "markdown",
+            "raw": "Rename, remove, add and change files\n",
+            "type": "rendered"
+          }
+        },
+        "repository": {
+          "full_name": "test-workspace/test-repo",
+          "links": {
+            "avatar": {
+              "href": "https://bytebucket.org/ravatar/%7B06cc78f5-9826-41c4-9bac-b4f44ca67ef4%7D?ts=default"
+            },
+            "html": {
+              "href": "https://bitbucket.org/test-workspace/test-repo"
+            },
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo"
+            }
+          },
+          "name": "test-repo",
+          "type": "repository",
+          "uuid": "{06cc78f5-9826-41c4-9bac-b4f44ca67ef4}"
+        },
+        "summary": {
+          "html": "<p>Rename, remove, add and change files</p>",
+          "markup": "markdown",
+          "raw": "Rename, remove, add and change files\n",
+          "type": "rendered"
+        },
+        "type": "commit"
+      }
+    ]
+  },
+  "headers": {},
+  "status": 200
+}
diff --git a/tests/unit/provider/fixtures/bitbucket/commits_page_1.json b/tests/unit/provider/fixtures/bitbucket/commits_page_1.json
new file mode 100644
index 00000000..3ce5bf08
--- /dev/null
+++ b/tests/unit/provider/fixtures/bitbucket/commits_page_1.json
@@ -0,0 +1,190 @@
+{
+  "body": {
+    "next": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commits/s4-commits?pagelen=2&ctx=f57da8e9c551db63dbf2e55108caf6ab&page=2",
+    "pagelen": 2,
+    "values": [
+      {
+        "author": {
+          "raw": "Test User <test@example.com>",
+          "type": "author",
+          "user": {
+            "account_id": "557058:00000000-0000-0000-0000-000000000001",
+            "display_name": "Test User",
+            "links": {
+              "avatar": {
+                "href": "https://avatar.example.com/test-user.png"
+              }
+            },
+            "nickname": "test-user",
+            "type": "user",
+            "uuid": "{00000000-0000-0000-0000-000000000001}"
+          }
+        },
+        "date": "2026-11-05T20:16:34+00:00",
+        "hash": "e3ef83d1a831b7b26c838372f668b1627bbf9a1a",
+        "links": {
+          "approve": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e3ef83d1a831b7b26c838372f668b1627bbf9a1a/approve"
+          },
+          "comments": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e3ef83d1a831b7b26c838372f668b1627bbf9a1a/comments"
+          },
+          "diff": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/diff/e3ef83d1a831b7b26c838372f668b1627bbf9a1a"
+          },
+          "html": {
+            "href": "https://bitbucket.org/test-workspace/test-repo/commits/e3ef83d1a831b7b26c838372f668b1627bbf9a1a"
+          },
+          "patch": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/patch/e3ef83d1a831b7b26c838372f668b1627bbf9a1a"
+          },
+          "self": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e3ef83d1a831b7b26c838372f668b1627bbf9a1a"
+          },
+          "statuses": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e3ef83d1a831b7b26c838372f668b1627bbf9a1a/statuses"
+          }
+        },
+        "message": "Update README\n",
+        "parents": [
+          {
+            "hash": "e723f15089c22737bb51aee8db06e0eab91e4ba1",
+            "links": {
+              "html": {
+                "href": "https://bitbucket.org/test-workspace/test-repo/commits/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+              },
+              "self": {
+                "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+              }
+            },
+            "type": "commit"
+          }
+        ],
+        "rendered": {
+          "message": {
+            "html": "<p>Update README</p>",
+            "markup": "markdown",
+            "raw": "Update README\n",
+            "type": "rendered"
+          }
+        },
+        "repository": {
+          "full_name": "test-workspace/test-repo",
+          "links": {
+            "avatar": {
+              "href": "https://bytebucket.org/ravatar/%7B06cc78f5-9826-41c4-9bac-b4f44ca67ef4%7D?ts=default"
+            },
+            "html": {
+              "href": "https://bitbucket.org/test-workspace/test-repo"
+            },
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo"
+            }
+          },
+          "name": "test-repo",
+          "type": "repository",
+          "uuid": "{06cc78f5-9826-41c4-9bac-b4f44ca67ef4}"
+        },
+        "summary": {
+          "html": "<p>Update README</p>",
+          "markup": "markdown",
+          "raw": "Update README\n",
+          "type": "rendered"
+        },
+        "type": "commit"
+      },
+      {
+        "author": {
+          "raw": "Test User <test@example.com>",
+          "type": "author",
+          "user": {
+            "account_id": "557058:00000000-0000-0000-0000-000000000001",
+            "display_name": "Test User",
+            "links": {
+              "avatar": {
+                "href": "https://avatar.example.com/test-user.png"
+              }
+            },
+            "nickname": "test-user",
+            "type": "user",
+            "uuid": "{00000000-0000-0000-0000-000000000001}"
+          }
+        },
+        "date": "2026-11-05T20:16:34+00:00",
+        "hash": "e723f15089c22737bb51aee8db06e0eab91e4ba1",
+        "links": {
+          "approve": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1/approve"
+          },
+          "comments": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1/comments"
+          },
+          "diff": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/diff/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+          },
+          "html": {
+            "href": "https://bitbucket.org/test-workspace/test-repo/commits/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+          },
+          "patch": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/patch/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+          },
+          "self": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+          },
+          "statuses": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1/statuses"
+          }
+        },
+        "message": "Rename, remove, add and change files\n",
+        "parents": [
+          {
+            "hash": "a682892aa0f4502ef7a242f75d72d0b41eaa27b9",
+            "links": {
+              "html": {
+                "href": "https://bitbucket.org/test-workspace/test-repo/commits/a682892aa0f4502ef7a242f75d72d0b41eaa27b9"
+              },
+              "self": {
+                "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/a682892aa0f4502ef7a242f75d72d0b41eaa27b9"
+              }
+            },
+            "type": "commit"
+          }
+        ],
+        "rendered": {
+          "message": {
+            "html": "<p>Rename, remove, add and change files</p>",
+            "markup": "markdown",
+            "raw": "Rename, remove, add and change files\n",
+            "type": "rendered"
+          }
+        },
+        "repository": {
+          "full_name": "test-workspace/test-repo",
+          "links": {
+            "avatar": {
+              "href": "https://bytebucket.org/ravatar/%7B06cc78f5-9826-41c4-9bac-b4f44ca67ef4%7D?ts=default"
+            },
+            "html": {
+              "href": "https://bitbucket.org/test-workspace/test-repo"
+            },
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo"
+            }
+          },
+          "name": "test-repo",
+          "type": "repository",
+          "uuid": "{06cc78f5-9826-41c4-9bac-b4f44ca67ef4}"
+        },
+        "summary": {
+          "html": "<p>Rename, remove, add and change files</p>",
+          "markup": "markdown",
+          "raw": "Rename, remove, add and change files\n",
+          "type": "rendered"
+        },
+        "type": "commit"
+      }
+    ]
+  },
+  "headers": {},
+  "status": 200
+}
diff --git a/tests/unit/provider/fixtures/bitbucket/compare_behind.json b/tests/unit/provider/fixtures/bitbucket/compare_behind.json
new file mode 100644
index 00000000..1acd8f86
--- /dev/null
+++ b/tests/unit/provider/fixtures/bitbucket/compare_behind.json
@@ -0,0 +1,99 @@
+{
+  "body": {
+    "pagelen": 100,
+    "values": [
+      {
+        "author": {
+          "raw": "Test User <test@example.com>",
+          "type": "author",
+          "user": {
+            "account_id": "557058:00000000-0000-0000-0000-000000000001",
+            "display_name": "Test User",
+            "links": {
+              "avatar": {
+                "href": "https://avatar.example.com/test-user.png"
+              }
+            },
+            "nickname": "test-user",
+            "type": "user",
+            "uuid": "{00000000-0000-0000-0000-000000000001}"
+          }
+        },
+        "date": "2026-11-05T20:00:34+00:00",
+        "hash": "c495d0431cfae535ec9a05e4def54229d0eb2ad2",
+        "links": {
+          "approve": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/c495d0431cfae535ec9a05e4def54229d0eb2ad2/approve"
+          },
+          "comments": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/c495d0431cfae535ec9a05e4def54229d0eb2ad2/comments"
+          },
+          "diff": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/diff/c495d0431cfae535ec9a05e4def54229d0eb2ad2"
+          },
+          "html": {
+            "href": "https://bitbucket.org/test-workspace/test-repo/commits/c495d0431cfae535ec9a05e4def54229d0eb2ad2"
+          },
+          "patch": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/patch/c495d0431cfae535ec9a05e4def54229d0eb2ad2"
+          },
+          "self": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/c495d0431cfae535ec9a05e4def54229d0eb2ad2"
+          },
+          "statuses": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/c495d0431cfae535ec9a05e4def54229d0eb2ad2/statuses"
+          }
+        },
+        "message": "Change math on test-branch-1\n",
+        "parents": [
+          {
+            "hash": "a682892aa0f4502ef7a242f75d72d0b41eaa27b9",
+            "links": {
+              "html": {
+                "href": "https://bitbucket.org/test-workspace/test-repo/commits/a682892aa0f4502ef7a242f75d72d0b41eaa27b9"
+              },
+              "self": {
+                "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/a682892aa0f4502ef7a242f75d72d0b41eaa27b9"
+              }
+            },
+            "type": "commit"
+          }
+        ],
+        "rendered": {
+          "message": {
+            "html": "<p>Change math on test-branch-1</p>",
+            "markup": "markdown",
+            "raw": "Change math on test-branch-1\n",
+            "type": "rendered"
+          }
+        },
+        "repository": {
+          "full_name": "test-workspace/test-repo",
+          "links": {
+            "avatar": {
+              "href": "https://bytebucket.org/ravatar/%7B06cc78f5-9826-41c4-9bac-b4f44ca67ef4%7D?ts=default"
+            },
+            "html": {
+              "href": "https://bitbucket.org/test-workspace/test-repo"
+            },
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo"
+            }
+          },
+          "name": "test-repo",
+          "type": "repository",
+          "uuid": "{06cc78f5-9826-41c4-9bac-b4f44ca67ef4}"
+        },
+        "summary": {
+          "html": "<p>Change math on test-branch-1</p>",
+          "markup": "markdown",
+          "raw": "Change math on test-branch-1\n",
+          "type": "rendered"
+        },
+        "type": "commit"
+      }
+    ]
+  },
+  "headers": {},
+  "status": 200
+}
diff --git a/tests/unit/provider/fixtures/bitbucket/compare_commits.json b/tests/unit/provider/fixtures/bitbucket/compare_commits.json
new file mode 100644
index 00000000..79c7360a
--- /dev/null
+++ b/tests/unit/provider/fixtures/bitbucket/compare_commits.json
@@ -0,0 +1,189 @@
+{
+  "body": {
+    "pagelen": 100,
+    "values": [
+      {
+        "author": {
+          "raw": "Test User <test@example.com>",
+          "type": "author",
+          "user": {
+            "account_id": "557058:00000000-0000-0000-0000-000000000001",
+            "display_name": "Test User",
+            "links": {
+              "avatar": {
+                "href": "https://avatar.example.com/test-user.png"
+              }
+            },
+            "nickname": "test-user",
+            "type": "user",
+            "uuid": "{00000000-0000-0000-0000-000000000001}"
+          }
+        },
+        "date": "2026-11-05T20:16:34+00:00",
+        "hash": "e3ef83d1a831b7b26c838372f668b1627bbf9a1a",
+        "links": {
+          "approve": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e3ef83d1a831b7b26c838372f668b1627bbf9a1a/approve"
+          },
+          "comments": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e3ef83d1a831b7b26c838372f668b1627bbf9a1a/comments"
+          },
+          "diff": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/diff/e3ef83d1a831b7b26c838372f668b1627bbf9a1a"
+          },
+          "html": {
+            "href": "https://bitbucket.org/test-workspace/test-repo/commits/e3ef83d1a831b7b26c838372f668b1627bbf9a1a"
+          },
+          "patch": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/patch/e3ef83d1a831b7b26c838372f668b1627bbf9a1a"
+          },
+          "self": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e3ef83d1a831b7b26c838372f668b1627bbf9a1a"
+          },
+          "statuses": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e3ef83d1a831b7b26c838372f668b1627bbf9a1a/statuses"
+          }
+        },
+        "message": "Update README\n",
+        "parents": [
+          {
+            "hash": "e723f15089c22737bb51aee8db06e0eab91e4ba1",
+            "links": {
+              "html": {
+                "href": "https://bitbucket.org/test-workspace/test-repo/commits/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+              },
+              "self": {
+                "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+              }
+            },
+            "type": "commit"
+          }
+        ],
+        "rendered": {
+          "message": {
+            "html": "<p>Update README</p>",
+            "markup": "markdown",
+            "raw": "Update README\n",
+            "type": "rendered"
+          }
+        },
+        "repository": {
+          "full_name": "test-workspace/test-repo",
+          "links": {
+            "avatar": {
+              "href": "https://bytebucket.org/ravatar/%7B06cc78f5-9826-41c4-9bac-b4f44ca67ef4%7D?ts=default"
+            },
+            "html": {
+              "href": "https://bitbucket.org/test-workspace/test-repo"
+            },
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo"
+            }
+          },
+          "name": "test-repo",
+          "type": "repository",
+          "uuid": "{06cc78f5-9826-41c4-9bac-b4f44ca67ef4}"
+        },
+        "summary": {
+          "html": "<p>Update README</p>",
+          "markup": "markdown",
+          "raw": "Update README\n",
+          "type": "rendered"
+        },
+        "type": "commit"
+      },
+      {
+        "author": {
+          "raw": "Test User <test@example.com>",
+          "type": "author",
+          "user": {
+            "account_id": "557058:00000000-0000-0000-0000-000000000001",
+            "display_name": "Test User",
+            "links": {
+              "avatar": {
+                "href": "https://avatar.example.com/test-user.png"
+              }
+            },
+            "nickname": "test-user",
+            "type": "user",
+            "uuid": "{00000000-0000-0000-0000-000000000001}"
+          }
+        },
+        "date": "2026-11-05T20:16:34+00:00",
+        "hash": "e723f15089c22737bb51aee8db06e0eab91e4ba1",
+        "links": {
+          "approve": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1/approve"
+          },
+          "comments": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1/comments"
+          },
+          "diff": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/diff/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+          },
+          "html": {
+            "href": "https://bitbucket.org/test-workspace/test-repo/commits/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+          },
+          "patch": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/patch/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+          },
+          "self": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1"
+          },
+          "statuses": {
+            "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/e723f15089c22737bb51aee8db06e0eab91e4ba1/statuses"
+          }
+        },
+        "message": "Rename, remove, add and change files\n",
+        "parents": [
+          {
+            "hash": "a682892aa0f4502ef7a242f75d72d0b41eaa27b9",
+            "links": {
+              "html": {
+                "href": "https://bitbucket.org/test-workspace/test-repo/commits/a682892aa0f4502ef7a242f75d72d0b41eaa27b9"
+              },
+              "self": {
+                "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/commit/a682892aa0f4502ef7a242f75d72d0b41eaa27b9"
+              }
+            },
+            "type": "commit"
+          }
+        ],
+        "rendered": {
+          "message": {
+            "html": "<p>Rename, remove, add and change files</p>",
+            "markup": "markdown",
+            "raw": "Rename, remove, add and change files\n",
+            "type": "rendered"
+          }
+        },
+        "repository": {
+          "full_name": "test-workspace/test-repo",
+          "links": {
+            "avatar": {
+              "href": "https://bytebucket.org/ravatar/%7B06cc78f5-9826-41c4-9bac-b4f44ca67ef4%7D?ts=default"
+            },
+            "html": {
+              "href": "https://bitbucket.org/test-workspace/test-repo"
+            },
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo"
+            }
+          },
+          "name": "test-repo",
+          "type": "repository",
+          "uuid": "{06cc78f5-9826-41c4-9bac-b4f44ca67ef4}"
+        },
+        "summary": {
+          "html": "<p>Rename, remove, add and change files</p>",
+          "markup": "markdown",
+          "raw": "Rename, remove, add and change files\n",
+          "type": "rendered"
+        },
+        "type": "commit"
+      }
+    ]
+  },
+  "headers": {},
+  "status": 200
+}
diff --git a/tests/unit/provider/fixtures/bitbucket/compare_diff.json b/tests/unit/provider/fixtures/bitbucket/compare_diff.json
new file mode 100644
index 00000000..7b11312c
--- /dev/null
+++ b/tests/unit/provider/fixtures/bitbucket/compare_diff.json
@@ -0,0 +1,5 @@
+{
+  "body": "diff --git a/README.md b/README.md\nindex 836111e..5d06a84 100644\n--- a/README.md\n+++ b/README.md\n@@ -1,3 +1,3 @@\n-# test-repo\n+# Test repo\n \n-A test repository.\n+Made-up content for tests.\ndiff --git a/PULL_REQUEST_TEMPLATE.md b/docs_PULL_REQUEST_TEMPLATE.md\nsimilarity index 100%\nrename from PULL_REQUEST_TEMPLATE.md\nrename to docs_PULL_REQUEST_TEMPLATE.md\ndiff --git a/src/test_app/math.py b/src/test_app/math.py\nindex 4693ad3..3581473 100644\n--- a/src/test_app/math.py\n+++ b/src/test_app/math.py\n@@ -1,2 +1,6 @@\n def add(a, b):\n     return a + b\n+\n+\n+def multiply(a, b):\n+    return a * b\ndiff --git a/src/test_app/ops.py b/src/test_app/ops.py\nnew file mode 100644\nindex 0000000..6078a09\n--- /dev/null\n+++ b/src/test_app/ops.py\n@@ -0,0 +1,2 @@\n+def subtract(a, b):\n+    return a - b\ndiff --git a/tests/test_math.py b/tests/test_math.py\ndeleted file mode 100644\nindex cfac67c..0000000\n--- a/tests/test_math.py\n+++ /dev/null\n@@ -1,5 +0,0 @@\n-from test_app.math import add\n-\n-\n-def test_add():\n-    assert add(1, 2) == 3\n",
+  "headers": {},
+  "status": 200
+}
diff --git a/tests/unit/provider/fixtures/bitbucket/compare_diffstat.json b/tests/unit/provider/fixtures/bitbucket/compare_diffstat.json
new file mode 100644
index 00000000..430a42e7
--- /dev/null
+++ b/tests/unit/provider/fixtures/bitbucket/compare_diffstat.json
@@ -0,0 +1,123 @@
+{
+  "body": {
+    "page": 1,
+    "pagelen": 100,
+    "size": 5,
+    "values": [
+      {
+        "lines_added": 2,
+        "lines_removed": 2,
+        "new": {
+          "escaped_path": "README.md",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/e3ef83d1a831b7b26c838372f668b1627bbf9a1a/README.md"
+            }
+          },
+          "path": "README.md",
+          "type": "commit_file"
+        },
+        "old": {
+          "escaped_path": "README.md",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/a682892aa0f4502ef7a242f75d72d0b41eaa27b9/README.md"
+            }
+          },
+          "path": "README.md",
+          "type": "commit_file"
+        },
+        "status": "modified",
+        "type": "diffstat"
+      },
+      {
+        "lines_added": 0,
+        "lines_removed": 0,
+        "new": {
+          "escaped_path": "docs_PULL_REQUEST_TEMPLATE.md",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/e3ef83d1a831b7b26c838372f668b1627bbf9a1a/docs_PULL_REQUEST_TEMPLATE.md"
+            }
+          },
+          "path": "docs_PULL_REQUEST_TEMPLATE.md",
+          "type": "commit_file"
+        },
+        "old": {
+          "escaped_path": "PULL_REQUEST_TEMPLATE.md",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/a682892aa0f4502ef7a242f75d72d0b41eaa27b9/PULL_REQUEST_TEMPLATE.md"
+            }
+          },
+          "path": "PULL_REQUEST_TEMPLATE.md",
+          "type": "commit_file"
+        },
+        "status": "renamed",
+        "type": "diffstat"
+      },
+      {
+        "lines_added": 4,
+        "lines_removed": 0,
+        "new": {
+          "escaped_path": "src/test_app/math.py",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/e3ef83d1a831b7b26c838372f668b1627bbf9a1a/src/test_app/math.py"
+            }
+          },
+          "path": "src/test_app/math.py",
+          "type": "commit_file"
+        },
+        "old": {
+          "escaped_path": "src/test_app/math.py",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/a682892aa0f4502ef7a242f75d72d0b41eaa27b9/src/test_app/math.py"
+            }
+          },
+          "path": "src/test_app/math.py",
+          "type": "commit_file"
+        },
+        "status": "modified",
+        "type": "diffstat"
+      },
+      {
+        "lines_added": 2,
+        "lines_removed": 0,
+        "new": {
+          "escaped_path": "src/test_app/ops.py",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/e3ef83d1a831b7b26c838372f668b1627bbf9a1a/src/test_app/ops.py"
+            }
+          },
+          "path": "src/test_app/ops.py",
+          "type": "commit_file"
+        },
+        "old": null,
+        "status": "added",
+        "type": "diffstat"
+      },
+      {
+        "lines_added": 0,
+        "lines_removed": 5,
+        "new": null,
+        "old": {
+          "escaped_path": "tests/test_math.py",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/a682892aa0f4502ef7a242f75d72d0b41eaa27b9/tests/test_math.py"
+            }
+          },
+          "path": "tests/test_math.py",
+          "type": "commit_file"
+        },
+        "status": "removed",
+        "type": "diffstat"
+      }
+    ]
+  },
+  "headers": {},
+  "status": 200
+}
diff --git a/tests/unit/provider/fixtures/bitbucket/diff.json b/tests/unit/provider/fixtures/bitbucket/diff.json
new file mode 100644
index 00000000..9312b8c1
--- /dev/null
+++ b/tests/unit/provider/fixtures/bitbucket/diff.json
@@ -0,0 +1,5 @@
+{
+  "body": "diff --git a/PULL_REQUEST_TEMPLATE.md b/docs_PULL_REQUEST_TEMPLATE.md\nsimilarity index 100%\nrename from PULL_REQUEST_TEMPLATE.md\nrename to docs_PULL_REQUEST_TEMPLATE.md\ndiff --git a/src/test_app/math.py b/src/test_app/math.py\nindex 4693ad3..3581473 100644\n--- a/src/test_app/math.py\n+++ b/src/test_app/math.py\n@@ -1,2 +1,6 @@\n def add(a, b):\n     return a + b\n+\n+\n+def multiply(a, b):\n+    return a * b\ndiff --git a/src/test_app/ops.py b/src/test_app/ops.py\nnew file mode 100644\nindex 0000000..6078a09\n--- /dev/null\n+++ b/src/test_app/ops.py\n@@ -0,0 +1,2 @@\n+def subtract(a, b):\n+    return a - b\ndiff --git a/tests/test_math.py b/tests/test_math.py\ndeleted file mode 100644\nindex cfac67c..0000000\n--- a/tests/test_math.py\n+++ /dev/null\n@@ -1,5 +0,0 @@\n-from test_app.math import add\n-\n-\n-def test_add():\n-    assert add(1, 2) == 3\n",
+  "headers": {},
+  "status": 200
+}
diff --git a/tests/unit/provider/fixtures/bitbucket/diffstat.json b/tests/unit/provider/fixtures/bitbucket/diffstat.json
new file mode 100644
index 00000000..70dcfa64
--- /dev/null
+++ b/tests/unit/provider/fixtures/bitbucket/diffstat.json
@@ -0,0 +1,97 @@
+{
+  "body": {
+    "page": 1,
+    "pagelen": 500,
+    "size": 4,
+    "values": [
+      {
+        "lines_added": 0,
+        "lines_removed": 0,
+        "new": {
+          "escaped_path": "docs_PULL_REQUEST_TEMPLATE.md",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/e723f15089c22737bb51aee8db06e0eab91e4ba1/docs_PULL_REQUEST_TEMPLATE.md"
+            }
+          },
+          "path": "docs_PULL_REQUEST_TEMPLATE.md",
+          "type": "commit_file"
+        },
+        "old": {
+          "escaped_path": "PULL_REQUEST_TEMPLATE.md",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/a682892aa0f4502ef7a242f75d72d0b41eaa27b9/PULL_REQUEST_TEMPLATE.md"
+            }
+          },
+          "path": "PULL_REQUEST_TEMPLATE.md",
+          "type": "commit_file"
+        },
+        "status": "renamed",
+        "type": "diffstat"
+      },
+      {
+        "lines_added": 4,
+        "lines_removed": 0,
+        "new": {
+          "escaped_path": "src/test_app/math.py",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/e723f15089c22737bb51aee8db06e0eab91e4ba1/src/test_app/math.py"
+            }
+          },
+          "path": "src/test_app/math.py",
+          "type": "commit_file"
+        },
+        "old": {
+          "escaped_path": "src/test_app/math.py",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/a682892aa0f4502ef7a242f75d72d0b41eaa27b9/src/test_app/math.py"
+            }
+          },
+          "path": "src/test_app/math.py",
+          "type": "commit_file"
+        },
+        "status": "modified",
+        "type": "diffstat"
+      },
+      {
+        "lines_added": 2,
+        "lines_removed": 0,
+        "new": {
+          "escaped_path": "src/test_app/ops.py",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/e723f15089c22737bb51aee8db06e0eab91e4ba1/src/test_app/ops.py"
+            }
+          },
+          "path": "src/test_app/ops.py",
+          "type": "commit_file"
+        },
+        "old": null,
+        "status": "added",
+        "type": "diffstat"
+      },
+      {
+        "lines_added": 0,
+        "lines_removed": 5,
+        "new": null,
+        "old": {
+          "escaped_path": "tests/test_math.py",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/a682892aa0f4502ef7a242f75d72d0b41eaa27b9/tests/test_math.py"
+            }
+          },
+          "path": "tests/test_math.py",
+          "type": "commit_file"
+        },
+        "status": "removed",
+        "type": "diffstat"
+      }
+    ]
+  },
+  "headers": {},
+  "status": 200
+}
diff --git a/tests/unit/provider/fixtures/bitbucket/diffstat_page_1.json b/tests/unit/provider/fixtures/bitbucket/diffstat_page_1.json
new file mode 100644
index 00000000..33cf478d
--- /dev/null
+++ b/tests/unit/provider/fixtures/bitbucket/diffstat_page_1.json
@@ -0,0 +1,64 @@
+{
+  "body": {
+    "next": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/diffstat/e723f15089c22737bb51aee8db06e0eab91e4ba1?pagelen=2&page=2",
+    "page": 1,
+    "pagelen": 2,
+    "size": 4,
+    "values": [
+      {
+        "lines_added": 0,
+        "lines_removed": 0,
+        "new": {
+          "escaped_path": "docs_PULL_REQUEST_TEMPLATE.md",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/e723f15089c22737bb51aee8db06e0eab91e4ba1/docs_PULL_REQUEST_TEMPLATE.md"
+            }
+          },
+          "path": "docs_PULL_REQUEST_TEMPLATE.md",
+          "type": "commit_file"
+        },
+        "old": {
+          "escaped_path": "PULL_REQUEST_TEMPLATE.md",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/a682892aa0f4502ef7a242f75d72d0b41eaa27b9/PULL_REQUEST_TEMPLATE.md"
+            }
+          },
+          "path": "PULL_REQUEST_TEMPLATE.md",
+          "type": "commit_file"
+        },
+        "status": "renamed",
+        "type": "diffstat"
+      },
+      {
+        "lines_added": 4,
+        "lines_removed": 0,
+        "new": {
+          "escaped_path": "src/test_app/math.py",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/e723f15089c22737bb51aee8db06e0eab91e4ba1/src/test_app/math.py"
+            }
+          },
+          "path": "src/test_app/math.py",
+          "type": "commit_file"
+        },
+        "old": {
+          "escaped_path": "src/test_app/math.py",
+          "links": {
+            "self": {
+              "href": "https://api.bitbucket.org/2.0/repositories/test-workspace/test-repo/src/a682892aa0f4502ef7a242f75d72d0b41eaa27b9/src/test_app/math.py"
+            }
+          },
+          "path": "src/test_app/math.py",
+          "type": "commit_file"
+        },
+        "status": "modified",
+        "type": "diffstat"
+      }
+    ]
+  },
+  "headers": {},
+  "status": 200
+}
diff --git a/tests/unit/provider/test_bitbucket.py b/tests/unit/provider/test_bitbucket.py
index fa0614de..3e21908d 100644
--- a/tests/unit/provider/test_bitbucket.py
+++ b/tests/unit/provider/test_bitbucket.py
@@ -2,6 +2,7 @@
 import json
 import pathlib
 import unittest.mock
+from datetime import UTC, date, datetime
 from typing import Any
 
 import pytest
@@ -11,13 +12,22 @@
 from scm.providers.bitbucket.provider import (
     BitbucketProvider,
     map_app_installation,
+    map_commit_author,
     map_paginated_action,
     map_repository,
     next_cursor,
     parse_scopes,
+    split_patches,
 )
 from scm.types import (
+    CompareCommitsProtocol,
     GetAppInstallationProtocol,
+    GetCommitChangesProtocol,
+    GetCommitProtocol,
+    GetCommitsByPathProtocol,
+    GetCommitsProtocol,
+    GetCommitsUrlProtocol,
+    GetCommitUrlProtocol,
     GetDirectoryContentsProtocol,
     GetFileContentProtocol,
     GetFileUrlProtocol,
@@ -33,6 +43,7 @@
 SRC = f"/2.0/repositories/{REPO}/src"
 
 SUPPORTED_PROTOCOLS = [
+    CompareCommitsProtocol,
     GetAppInstallationProtocol,
     GetGitRemoteProtocol,
     GetDirectoryContentsProtocol,
@@ -40,8 +51,18 @@
     GetFileUrlProtocol,
     GetPullRequestTemplateProtocol,
     GetReadmeProtocol,
+    GetCommitChangesProtocol,
+    GetCommitProtocol,
+    GetCommitsByPathProtocol,
+    GetCommitsProtocol,
+    GetCommitsUrlProtocol,
+    GetCommitUrlProtocol,
     GetRepositoryProtocol,
 ]
+COMMIT_SHA = "e723f15089c22737bb51aee8db06e0eab91e4ba1"
+HEAD_SHA = "e3ef83d1a831b7b26c838372f668b1627bbf9a1a"
+BRANCH_SHA = "c495d0431cfae535ec9a05e4def54229d0eb2ad2"
+TEST_AUTHOR = {"name": "Test User", "email": "test@example.com", "date": datetime(2026, 11, 5, 20, 16, 34, tzinfo=UTC)}
 
 
 def recorded(name: str) -> requests.Response:
@@ -352,3 +373,262 @@ def test_line_anchors(self, provider: BitbucketProvider, start: int | None, end:
 
     def test_quotes_path(self, provider: BitbucketProvider) -> None:
         assert provider.get_file_url("docs/read me.md", "abc123").endswith("/src/abc123/docs/read%20me.md")
+
+
+class TestCommitUrls:
+    def test_commit_url(self, provider: BitbucketProvider) -> None:
+        assert provider.get_commit_url("abc") == f"https://bitbucket.org/{REPO}/commits/abc"
+
+    def test_file_history_url_ignores_dates(self, provider: BitbucketProvider) -> None:
+        url = provider.get_commits_url(
+            "abc", file_path="src/my file.py", since=date(2026, 1, 1), until=date(2026, 2, 1)
+        )
+        assert url == f"https://bitbucket.org/{REPO}/history-node/abc/src/my%20file.py"
+
+    def test_commits_url_without_path(self, provider: BitbucketProvider) -> None:
+        assert provider.get_commits_url("abc", since=date(2026, 1, 1)) == f"https://bitbucket.org/{REPO}/commits"
+
+
+class TestGetCommit:
+    def test_maps_commit_with_files(self, provider: BitbucketProvider, client: unittest.mock.MagicMock) -> None:
+        client.request.side_effect = [recorded("commit"), recorded("diffstat"), recorded("diff")]
+
+        result = provider.get_commit(COMMIT_SHA)
+
+        assert requested_paths(client) == [
+            f"/2.0/repositories/{REPO}/commit/{COMMIT_SHA}",
+            f"/2.0/repositories/{REPO}/diffstat/{COMMIT_SHA}",
+            f"/2.0/repositories/{REPO}/diff/{COMMIT_SHA}",
+        ]
+        commit = result["data"]
+        assert commit["id"] == COMMIT_SHA
+        assert commit["message"] == "Rename, remove, add and change files\n"
+        assert commit["author"] == TEST_AUTHOR
+        assert (commit["additions"], commit["deletions"]) == (6, 5)
+        assert [(f["filename"], f["status"]) for f in commit["files"] or []] == [
+            ("docs_PULL_REQUEST_TEMPLATE.md", "renamed"),
+            ("src/test_app/math.py", "modified"),
+            ("src/test_app/ops.py", "added"),
+            ("tests/test_math.py", "removed"),
+        ]
+
+    def test_partial_files_leave_totals_unset(
+        self, provider: BitbucketProvider, client: unittest.mock.MagicMock
+    ) -> None:
+        client.request.side_effect = [recorded("commit"), recorded("diffstat_page_1"), recorded("diff")]
+
+        commit = provider.get_commit(COMMIT_SHA)["data"]
+
+        assert len(commit["files"] or []) == 2
+        assert (commit["additions"], commit["deletions"]) == (None, None)
+
+    def test_missing_commit(self, provider: BitbucketProvider, client: unittest.mock.MagicMock) -> None:
+        client.request.return_value = recorded("commit_not_found")
+        with pytest.raises(ResourceNotFound):
+            provider.get_commit("deadbeef")
+
+
+class TestGetCommitChanges:
+    def test_maps_files_with_patches(self, provider: BitbucketProvider, client: unittest.mock.MagicMock) -> None:
+        client.request.side_effect = [recorded("diffstat"), recorded("diff")]
+
+        result = provider.get_commit_changes(COMMIT_SHA)
+
+        assert result["meta"]["next_cursor"] is None
+        renamed, modified, added, removed = result["data"]
+        assert renamed == {
+            "filename": "docs_PULL_REQUEST_TEMPLATE.md",
+            "status": "renamed",
+            "patch": None,
+            "additions": 0,
+            "deletions": 0,
+            "previous_filename": "PULL_REQUEST_TEMPLATE.md",
+        }
+        assert modified["patch"] == (
+            "@@ -1,2 +1,6 @@\n def add(a, b):\n     return a + b\n+\n+\n+def multiply(a, b):\n+    return a * b\n"
+        )
+        assert (modified["additions"], modified["deletions"], modified["previous_filename"]) == (4, 0, None)
+        assert added["patch"] == "@@ -0,0 +1,2 @@\n+def subtract(a, b):\n+    return a - b\n"
+        assert (removed["filename"], removed["deletions"]) == ("tests/test_math.py", 5)
+        assert (removed["patch"] or "").startswith("@@ -1,5 +0,0 @@\n-from test_app.math import add")
+
+    def test_pages(self, provider: BitbucketProvider, client: unittest.mock.MagicMock) -> None:
+        client.request.side_effect = [recorded("diffstat_page_1"), recorded("diff")]
+
+        result = provider.get_commit_changes(COMMIT_SHA, pagination={"cursor": "1", "per_page": 2})
+
+        assert len(result["data"]) == 2
+        assert result["meta"]["next_cursor"] == "2"
+        assert client.request.call_args_list[0].kwargs["params"] == {"pagelen": "2"}
+
+    def test_unknown_status(self, provider: BitbucketProvider, client: unittest.mock.MagicMock) -> None:
+        diffstat = recorded("diffstat")
+        body = json.loads(diffstat.content)
+        body["values"][1]["status"] = "merge conflict"
+        diffstat._content = json.dumps(body).encode()
+        client.request.side_effect = [diffstat, recorded("diff")]
+
+        assert provider.get_commit_changes(COMMIT_SHA)["data"][1]["status"] == "unknown"
+
+
+class TestGetCommits:
+    def test_lists_commits_on_ref(self, provider: BitbucketProvider, client: unittest.mock.MagicMock) -> None:
+        client.request.return_value = recorded("commits_page_1")
+
+        result = provider.get_commits("feature/x", pagination={"per_page": 2})
+
+        assert request_kwargs(client)["path"] == f"/2.0/repositories/{REPO}/commits/feature/x"
+        assert request_kwargs(client)["params"] == {"pagelen": "2"}
+        assert [c["id"] for c in result["data"]] == [HEAD_SHA, COMMIT_SHA]
+        assert result["data"][0]["message"] == "Update README\n"
+        assert result["data"][0]["author"] == TEST_AUTHOR
+        assert result["meta"]["next_cursor"] == "2"
+
+    def test_defaults_to_main_branch(self, provider: BitbucketProvider, client: unittest.mock.MagicMock) -> None:
+        client.request.return_value = recorded("commits_page_1")
+        provider.get_commits()
+        assert request_kwargs(client)["path"] == f"/2.0/repositories/{REPO}/commits/HEAD"
+
+    def test_date_filter_skips_pages_after_until(
+        self, provider: BitbucketProvider, client: unittest.mock.MagicMock
+    ) -> None:
+        def page(date: str, next_url: str | None) -> requests.Response:
+            response = requests.Response()
+            response.status_code = 200
+            commit = {"hash": date, "message": "m", "author": {"raw": "Test User <test@example.com>"}, "date": date}
+            body: dict[str, Any] = {"values": [commit]}
+            if next_url:
+                body["next"] = next_url
+            response._content = json.dumps(body).encode()
+            return response
+
+        client.request.side_effect = [
+            page("2026-11-05T00:00:00+00:00", "https://api.bitbucket.org/2.0/commits?page=2"),
+            page("2026-11-01T00:00:00+00:00", None),
+        ]
+
+        result = provider.get_commits(until=datetime(2026, 11, 2, tzinfo=UTC), pagination={"per_page": 1})
+
+        assert [c["id"] for c in result["data"]] == ["2026-11-01T00:00:00+00:00"]
+        assert client.request.call_args_list[1].kwargs["params"] == {"pagelen": "1", "page": "2"}
+
+    def test_lists_commits_by_path(self, provider: BitbucketProvider, client: unittest.mock.MagicMock) -> None:
+        client.request.return_value = recorded("commits_by_path_page_1")
+
+        result = provider.get_commits_by_path("src/test_app/math.py", ref="s4-commits", pagination={"per_page": 1})
+
+        assert request_kwargs(client)["path"] == f"/2.0/repositories/{REPO}/commits/s4-commits"
+        assert request_kwargs(client)["params"] == {"path": "src/test_app/math.py", "pagelen": "1"}
+        assert [c["id"] for c in result["data"]] == [COMMIT_SHA]
+        assert result["meta"]["next_cursor"] == "2"
+
+    @pytest.mark.parametrize(
+        ("kwargs", "ids", "next_cursor"),
+        [
+            ({"since": datetime(2026, 11, 3, tzinfo=UTC)}, [HEAD_SHA], "2"),
+            ({"since": datetime(2026, 11, 1)}, [HEAD_SHA, COMMIT_SHA], "2"),
+            ({"until": datetime(2026, 11, 3, tzinfo=UTC)}, [COMMIT_SHA], "2"),
+            ({"since": datetime(2026, 11, 6, tzinfo=UTC)}, [], None),
+        ],
+    )
+    def test_filters_by_date(
+        self,
+        provider: BitbucketProvider,
+        client: unittest.mock.MagicMock,
+        kwargs: dict[str, Any],
+        ids: list[str],
+        next_cursor: str | None,
+    ) -> None:
+        page = recorded("commits_page_1")
+        body = json.loads(page.content)
+        body["values"][1]["date"] = "2026-11-02T08:00:00+00:00"
+        page._content = json.dumps(body).encode()
+        client.request.return_value = page
+
+        result = provider.get_commits_by_path("README.md", **kwargs)
+
+        assert [c["id"] for c in result["data"]] == ids
+        assert result["meta"]["next_cursor"] == next_cursor
+
+
+class TestCompareCommits:
+    def test_compares_against_merge_base(self, provider: BitbucketProvider, client: unittest.mock.MagicMock) -> None:
+        client.request.side_effect = [
+            recorded("compare_commits"),
+            recorded("compare_diff"),
+            recorded("compare_diffstat"),
+            recorded("compare_behind"),
+        ]
+
+        result = provider.compare_commits(BRANCH_SHA, HEAD_SHA)
+
+        calls = client.request.call_args_list
+        assert calls[0].kwargs["params"] == {"include": HEAD_SHA, "exclude": BRANCH_SHA, "pagelen": "100"}
+        assert requested_paths(client)[1:3] == [
+            f"/2.0/repositories/{REPO}/diff/{HEAD_SHA}..{BRANCH_SHA}",
+            f"/2.0/repositories/{REPO}/diffstat/{HEAD_SHA}..{BRANCH_SHA}",
+        ]
+        assert calls[3].kwargs["params"] == {"include": BRANCH_SHA, "exclude": HEAD_SHA, "pagelen": "100"}
+        comparison = result["data"]
+        assert (comparison["ahead_by"], comparison["behind_by"]) == (2, 1)
+        assert [c["id"] for c in comparison["commits"]] == [HEAD_SHA, COMMIT_SHA]
+        assert [(f["filename"], f["status"]) for f in comparison["diff"]] == [
+            ("README.md", "modified"),
+            ("docs_PULL_REQUEST_TEMPLATE.md", "renamed"),
+            ("src/test_app/math.py", "modified"),
+            ("src/test_app/ops.py", "added"),
+            ("tests/test_math.py", "removed"),
+        ]
+        assert all(f["patch"] for f in comparison["diff"] if f["status"] != "renamed")
+        assert result["meta"]["next_cursor"] is None
+
+    def test_paged_compare_skips_behind(self, provider: BitbucketProvider, client: unittest.mock.MagicMock) -> None:
+        client.request.side_effect = [
+            recorded("compare_commits"),
+            recorded("compare_diff"),
+            recorded("compare_diffstat"),
+        ]
+
+        result = provider.compare_commits(BRANCH_SHA, HEAD_SHA, pagination={"per_page": 2})
+
+        assert client.request.call_count == 3
+        assert "behind_by" not in result["data"]
+
+    def test_reads_every_changed_file(self, provider: BitbucketProvider, client: unittest.mock.MagicMock) -> None:
+        client.request.side_effect = [
+            recorded("compare_commits"),
+            recorded("compare_diff"),
+            recorded("diffstat_page_1"),
+            recorded("diffstat"),
+        ]
+
+        result = provider.compare_commits(BRANCH_SHA, HEAD_SHA, pagination={"per_page": 2})
+
+        files = len(recorded("diffstat_page_1").json()["values"]) + len(recorded("diffstat").json()["values"])
+        assert len(result["data"]["diff"]) == files
+
+    def test_include_behind_with_pagination(self, provider: BitbucketProvider) -> None:
+        with pytest.raises(ResourceBadRequest):
+            provider.compare_commits(BRANCH_SHA, HEAD_SHA, pagination={"per_page": 1}, include_behind=True)
+
+
+class TestCommitMapping:
+    @pytest.mark.parametrize(
+        ("raw", "name", "email"),
+        [
+            ({"raw": "Test User <test@example.com>"}, "Test User", "test@example.com"),
+            ({"raw": "<test@example.com>"}, "", "test@example.com"),
+            ({"raw": "Test User"}, "Test User", ""),
+        ],
+    )
+    def test_author_without_linked_user(self, raw: dict[str, Any], name: str, email: str) -> None:
+        author = map_commit_author(raw, "2026-11-05T20:16:34+00:00")
+        assert (author["name"], author["email"]) == (name, email)
+
+    def test_split_patches_skips_files_without_hunks(self) -> None:
+        diff = (
+            "diff --git a/old.md b/new.md\nsimilarity index 100%\nrename from old.md\nrename to new.md\n"
+            "diff --git a/img.png b/img.png\nBinary files a/img.png and b/img.png differ\n"
+            "diff --git a/a.py b/a.py\n--- a/a.py\n+++ b/a.py\n@@ -1 +1 @@\n-x\n+y\n"
+        )
+        assert split_patches(diff) == {"a.py": "@@ -1 +1 @@\n-x\n+y\n"}