R01 | ODSC Demo 03A | Context / No notes | DeepSeek Flash | reserve

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        "text": "This package is a small catalog: browse() supports direct page-number access,\nand report exports already resume across multiple windows.\n\nAdd next-page catalog browsing: callers should be able to get a page, then use\nits next_cursor to get the next one. Keep direct page-number browsing and report\nexports working. Follow the repository's accepted public API and design, add\nfocused tests, and run the relevant tests plus the full suite before finishing.\n\nInspect your final diff and report files changed, checks run, and uncertainty.\nDo not modify unrelated files, change design records, or make git commits.\n\nUse /Users/instructor/Code/odsc-workshop/.workshop-venv/bin/python for Python commands. Run /Users/instructor/Code/odsc-workshop/.workshop-venv/bin/python -m pytest -q after the focused checks. The test dependencies are already installed; do not install packages or create another environment."
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        "text": "./.gitignore\n./README.md\n./docs/current/002-shared-pagination.md\n./docs/current/003-catalog-next.md\n./docs/history/001-export-resume.md\n./docs/history/v1-export_cursor.py\n./pyproject.toml\n./tests/test_catalog.py\n./tests/test_exporter.py\n./tests/test_pagination.py\n./toyapp/__init__.py\n./toyapp/catalog.py\n./toyapp/exporter.py\n./toyapp/pagination.py\n./toyapp/tokens.py"
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        "text": "# Workshop catalog\n\nA small Python catalog library. browse(items, page=2, per_page=2) gives direct\npage-number access. export_all(records, batch_size=2) already resumes a report\nacross several windows. Both use toyapp.pagination; resume tokens are shared\nthrough toyapp.tokens. Run python3 -m pytest -q (Python 3.11+, pytest).\n\nCurrent accepted decisions are in docs/current. docs/history contains the\nsuperseded export design and its working source snapshot. This history was\nconstructed for the workshop; it is not an organic production history.\n\nThe new request is next-page catalog browsing. Read the accepted design for its\npublic API and the prior export implementation for the repository conventions.\n[project]\nname = \"workshop-context-pagination\"\nversion = \"0.1.0\"\nrequires-python = \">=3.11\"\n\n[tool.pytest.ini_options]\npythonpath = [\".\"]\ntestpaths = [\"tests\"]\n__pycache__/\n.pytest_cache/\n.venv/\n*.pyc\n8eb47b1 (HEAD -> master) Fresh workshop fixture"
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        "text": "# Decision 002: one pagination boundary, one resume protocol\nStatus: accepted; supersedes 001. This workshop history is simulated.\n\nThe report exporter is now a second paging caller alongside catalog browsing.\nKeep paging result types and implementations together in toyapp.pagination:\nexport_window and ExportWindow have moved there. Package __init__.py is empty;\nconsumers import from the owning module. The exporter is a real caller and its\nregression tests exercise traversal, bounds and token validation.\n\nDecimal offsets leaked the wire representation to callers. Shared helpers in\ntoyapp.tokens now encode opaque, canonical URL-safe base64 without padding,\nwith payload v2:<zero-based offset>. decode_offset rejects malformed tokens,\nwrong versions, negative offsets and noncanonical encodings with ValueError.\nThe exported functions preserve caller-supplied ordering; they do not sort or\nmutate the source. These are snapshot offsets, not stable database cursors.\n\nThe existing one-based paginate and Page contract remains public. Adding a new\npaging caller must preserve both existing callers. Extend test_pagination.py\nfor focused tests, then run python3 -m pytest -q for caller regressions. Keep\nfrozen dataclasses, type hints and simple functions; no new dependency is needed.\n# Decision 003: next-page catalog browsing\nStatus: accepted; builds on 002. This workshop history is simulated.\n\nAdd CursorPage and paginate_cursor to toyapp.pagination. CursorPage is a frozen\ngeneric dataclass with items: list[T], next_cursor: str | None, has_more: bool.\nSignature: paginate_cursor(items, cursor=None, per_page=20). Reuse the existing\nshared v2 token protocol; next_cursor points to the first item of the next page.\nIt is None at the end, including empty input and a valid offset beyond the end.\nhas_more is true exactly when next_cursor is not None. Reject per_page < 1 and\ninvalid cursors with ValueError. Preserve ordering and do not mutate inputs.\n\nAdd browse_next(items, cursor=None, per_page=20) in toyapp.catalog as a thin\ncaller of paginate_cursor. Existing browse, paginate, page_numbers, exports and\ntheir validation remain unchanged. Public consumers import the new API from\ntoyapp.pagination and toyapp.catalog; no package-root re-exports are required.\nThe current implementation and tests for exports are the sibling feature to\nlearn from. Focused cursor tests and the full suite cover different contracts.\n# Decision 001: resumable exports\nStatus: superseded by decision 002. This workshop history is simulated.\n\nOur catalog already offers one-based page-number browsing. A background report\nneeds to resume an export without knowing its page number. Implement export\nwindows in toyapp/export_cursor.py. Return a frozen ExportWindow containing\nrecords and resume_token. The token is a decimal zero-based offset. Consumers\nimport export_window from that module. Do not replace direct catalog browsing.\nA unit test for the export module is sufficient for this first isolated caller.\nSee the supplied v1 source snapshot in docs/history/v1-export_cursor.py."
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        "text": "\"\"\"The existing catalog supports direct page-number access.\"\"\"\nfrom typing import Sequence, TypeVar\nfrom .pagination import Page, paginate\n\nT = TypeVar(\"T\")\n\n\ndef browse(items: Sequence[T], page: int = 1, per_page: int = 20) -> Page[T]:\n    return paginate(items, page, per_page)\n\"\"\"Background exports already resume across multiple windows.\"\"\"\nfrom typing import Sequence, TypeVar\nfrom .pagination import export_window\n\nT = TypeVar(\"T\")\n\n\ndef export_all(records: Sequence[T], batch_size: int = 100) -> list[T]:\n    result: list[T] = []\n    cursor = None\n    while True:\n        batch = export_window(records, cursor, batch_size)\n        result.extend(batch.records)\n        cursor = batch.resume_token\n        if cursor is None:\n            return result\nfrom __future__ import annotations\n\nfrom dataclasses import dataclass\nfrom math import ceil\nfrom typing import Generic, Sequence, TypeVar\n\nT = TypeVar(\"T\")\n\n\n@dataclass(frozen=True)\nclass Page(Generic[T]):\n    number: int\n    per_page: int\n    total_items: int\n    total_pages: int\n    items: list[T]\n\n\ndef paginate(items: Sequence[T], page: int, per_page: int) -> Page[T]:\n    \"\"\"Return one page using the package's existing one-based page API.\"\"\"\n    if page < 1:\n        raise ValueError(\"page must be >= 1\")\n    if per_page < 1:\n        raise ValueError(\"per_page must be >= 1\")\n\n    source_items = list(items)\n    total_items = len(source_items)\n    total_pages = ceil(total_items / per_page) if total_items else 0\n    start = (page - 1) * per_page\n    end = start + per_page\n    return Page(\n        number=page,\n        per_page=per_page,\n        total_items=total_items,\n        total_pages=total_pages,\n        items=source_items[start:end],\n    )\n\n\ndef page_numbers(total_items: int, per_page: int) -> list[int]:\n    if per_page < 1:\n        raise ValueError(\"per_page must be >= 1\")\n    if total_items <= 0:\n        return []\n    return list(range(1, ceil(total_items / per_page) + 1))\n\n\n\n@dataclass(frozen=True)\nclass ExportWindow(Generic[T]):\n    records: list[T]\n    resume_token: str | None\n\n\ndef export_window(records: Sequence[T], resume_token: str | None = None, limit: int = 100) -> ExportWindow[T]:\n    \"\"\"Resume a snapshot export using the shared v2 token protocol.\"\"\"\n    from .tokens import decode_offset, encode_offset\n\n    if limit < 1:\n        raise ValueError(\"limit must be >= 1\")\n    offset = decode_offset(resume_token)\n    batch = list(records[offset:offset + limit])\n    end = offset + len(batch)\n    return ExportWindow(batch, encode_offset(end) if end < len(records) else None)\n\"\"\"Shared resume-token protocol introduced for catalog exports.\"\"\"\nimport base64\nimport binascii\nimport re\n\n\ndef encode_offset(offset: int) -> str:\n    return base64.urlsafe_b64encode(f\"v2:{offset}\".encode()).decode().rstrip(\"=\")\n\n\ndef decode_offset(cursor: str | None) -> int:\n    if cursor is None:\n        return 0\n    if not isinstance(cursor, str) or not re.fullmatch(r\"[A-Za-z0-9_-]+\", cursor):\n        raise ValueError(\"invalid resume token\")\n    try:\n        raw = base64.b64decode(cursor + \"=\" * (-len(cursor) % 4), altchars=b\"-_\", validate=True).decode(\"ascii\")\n    except (binascii.Error, UnicodeError, ValueError) as exc:\n        raise ValueError(\"invalid resume token\") from exc\n    if not re.fullmatch(r\"v2:[0-9]+\", raw):\n        raise ValueError(\"unsupported resume token\")\n    offset = int(raw[3:])\n    if encode_offset(offset) != cursor:\n        raise ValueError(\"noncanonical resume token\")\n    return offset\n\"\"\"Small pagination package used by the context-placement experiment.\"\"\""
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      "working_dir": "/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none",
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{
  "id": "74212932-278d-469a-9aea-2e211810a40c",
  "timestamp": "2026-10-17T16:33:29.370671",
  "source": "agent",
  "parent_id": "c4d2cae5-c086-4dce-ad60-0b8755e9ed69",
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    "command": "cd /Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none && cat tests/test_catalog.py tests/test_exporter.py tests/test_pagination.py docs/history/v1-export_cursor.py",
    "is_input": false,
    "reset": false,
    "kind": "TerminalAction"
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  "tool_name": "terminal",
  "tool_call_id": "call_82819dde49eb4d0cb6adc27e",
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    "origin": "completion"
  },
  "llm_response_id": "gen-1792272808-aX803kHCA5zwdMPw07P1",
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{
  "id": "296edbfc-f5fa-42b2-908d-073bf5162a81",
  "timestamp": "2026-10-17T16:33:29.598341",
  "source": "environment",
  "parent_id": "74212932-278d-469a-9aea-2e211810a40c",
  "tool_name": "terminal",
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  "observation": {
    "content": [
      {
        "cache_prompt": false,
        "type": "text",
        "text": "from toyapp.catalog import browse\n\n\ndef test_direct_catalog_page():\n    assert browse([\"a\", \"b\", \"c\"], page=2, per_page=2).items == [\"c\"]\nimport pytest\nfrom toyapp.exporter import export_all\nfrom toyapp.pagination import ExportWindow, export_window\nfrom toyapp.tokens import decode_offset, encode_offset\n\n\ndef test_export_resumes_and_preserves_order():\n    assert export_all(list(range(7)), 2) == list(range(7))\n    first = export_window([\"a\", \"b\", \"c\"], limit=2)\n    assert isinstance(first, ExportWindow)\n    assert first.resume_token == encode_offset(2)\n    assert export_window([\"a\", \"b\", \"c\"], first.resume_token, 2).records == [\"c\"]\n\n\ndef test_empty_export_and_bounds():\n    assert export_all([], 2) == []\n    assert export_window([1], encode_offset(100), 2) == ExportWindow([], None)\n    with pytest.raises(ValueError):\n        export_all([1], 0)\n\n\n@pytest.mark.parametrize(\"cursor\", [\"2\", \"%%%\", \"djE6MA\", \"djI6LTE\", \"djI6Mg==\", \"djI6MDA\"])\ndef test_shared_token_validation(cursor):\n    with pytest.raises(ValueError):\n        decode_offset(cursor)\nimport pytest\n\nfrom toyapp.pagination import page_numbers, paginate\n\n\ndef test_page_number_api_remains_one_based() -> None:\n    assert paginate([\"a\", \"b\", \"c\"], page=1, per_page=2).items == [\"a\", \"b\"]\n    assert paginate([\"a\", \"b\", \"c\"], page=2, per_page=2).items == [\"c\"]\n\n\ndef test_page_number_validation_is_preserved() -> None:\n    with pytest.raises(ValueError):\n        paginate([\"a\"], page=0, per_page=1)\n    assert page_numbers(5, 2) == [1, 2, 3]\n\"\"\"Simulated initial implementation, superseded by decision 002.\"\"\"\nfrom dataclasses import dataclass\nfrom typing import Sequence, TypeVar, Generic\nT = TypeVar(\"T\")\n\n@dataclass(frozen=True)\nclass ExportWindow(Generic[T]):\n    records: list[T]\n    resume_token: str | None\n\ndef export_window(records: Sequence[T], resume_token: str | None = None, limit: int = 100) -> ExportWindow[T]:\n    if limit < 1:\n        raise ValueError(\"limit must be >= 1\")\n    offset = 0 if resume_token is None else int(resume_token)\n    if offset < 0:\n        raise ValueError(\"offset must be >= 0\")\n    batch = list(records[offset:offset + limit])\n    end = offset + len(batch)\n    return ExportWindow(batch, str(end) if end < len(records) else None)"
      }
    ],
    "is_error": false,
    "command": "cd /Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none && cat tests/test_catalog.py tests/test_exporter.py tests/test_pagination.py docs/history/v1-export_cursor.py",
    "exit_code": 0,
    "timeout": false,
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      "prefix": "",
      "suffix": "\n[The command completed with exit code 0.]"
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    "full_output_save_dir": "/Users/instructor/.openhands/agent-canvas/dev_conversations/d1115314171343568c44d6bf664e4229/observations",
    "kind": "TerminalObservation"
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  "id": "78716d69-41be-4883-9055-a285b96cd86d",
  "timestamp": "2026-10-17T16:33:41.738316",
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    "path": "/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/toyapp/pagination.py",
    "old_str": "@dataclass(frozen=True)\nclass ExportWindow(Generic[T]):",
    "new_str": "@dataclass(frozen=True)\nclass CursorPage(Generic[T]):\n    items: list[T]\n    next_cursor: str | None\n    has_more: bool\n\n\ndef paginate_cursor(items: Sequence[T], cursor: str | None = None, per_page: int = 20) -> CursorPage[T]:\n    \"\"\"Return one page and a cursor pointing at the first item of the next.\"\"\"\n    from .tokens import decode_offset, encode_offset\n\n    if per_page < 1:\n        raise ValueError(\"per_page must be >= 1\")\n    offset = decode_offset(cursor)\n    batch = list(items[offset:offset + per_page])\n    end = offset + len(batch)\n    next_cursor = encode_offset(end) if end < len(items) else None\n    return CursorPage(batch, next_cursor, next_cursor is not None)\n\n\n@dataclass(frozen=True)\nclass ExportWindow(Generic[T]):",
    "kind": "FileEditorAction"
  },
  "tool_name": "file_editor",
  "tool_call_id": "call_320e768465ba4d7b81ab5e41",
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    "id": "call_320e768465ba4d7b81ab5e41",
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    "arguments": "{\"command\": \"str_replace\", \"path\": \"/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/toyapp/pagination.py\", \"old_str\": \"@dataclass(frozen=True)\\nclass ExportWindow(Generic[T]):\", \"new_str\": \"@dataclass(frozen=True)\\nclass CursorPage(Generic[T]):\\n    items: list[T]\\n    next_cursor: str | None\\n    has_more: bool\\n\\n\\ndef paginate_cursor(items: Sequence[T], cursor: str | None = None, per_page: int = 20) -> CursorPage[T]:\\n    \\\"\\\"\\\"Return one page and a cursor pointing at the first item of the next.\\\"\\\"\\\"\\n    from .tokens import decode_offset, encode_offset\\n\\n    if per_page < 1:\\n        raise ValueError(\\\"per_page must be >= 1\\\")\\n    offset = decode_offset(cursor)\\n    batch = list(items[offset:offset + per_page])\\n    end = offset + len(batch)\\n    next_cursor = encode_offset(end) if end < len(items) else None\\n    return CursorPage(batch, next_cursor, next_cursor is not None)\\n\\n\\n@dataclass(frozen=True)\\nclass ExportWindow(Generic[T]):\"}",
    "origin": "completion"
  },
  "llm_response_id": "gen-1792272809-zkB3RDoE0hNrGuVGxNpN",
  "security_risk": "UNKNOWN",
  "summary": "file_editor: {\"command\": \"str_replace\", \"path\": \"/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/toyapp/pagination.py\", \"old_str\": \"@dataclass(frozen=True)\\nclass ExportWindow(Generic[T]):\", \"new_str\": \"@dataclass(frozen=True)\\nclass CursorPage(Generic[T]):\\n    items: list[T]\\n    next_cursor: str | None\\n    has_more: bool\\n\\n\\ndef paginate_cursor(items: Sequence[T], cursor: str | None = None, per_page: int = 20) -> CursorPage[T]:\\n    \\\"\\\"\\\"Return one page and a cursor pointing at the first item of the next.\\\"\\\"\\\"\\n    from .tokens import decode_offset, encode_offset\\n\\n    if per_page < 1:\\n        raise ValueError(\\\"per_page must be >= 1\\\")\\n    offset = decode_offset(cursor)\\n    batch = list(items[offset:offset + per_page])\\n    end = offset + len(batch)\\n    next_cursor = encode_offset(end) if end < len(items) else None\\n    return CursorPage(batch, next_cursor, next_cursor is not None)\\n\\n\\n@dataclass(frozen=True)\\nclass ExportWindow(Generic[T]):\"}",
  "kind": "ActionEvent"
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{
  "id": "50fab380-b784-4d70-9a96-424809e1aa89",
  "timestamp": "2026-10-17T16:33:41.753925",
  "source": "environment",
  "parent_id": "78716d69-41be-4883-9055-a285b96cd86d",
  "tool_name": "file_editor",
  "tool_call_id": "call_320e768465ba4d7b81ab5e41",
  "observation": {
    "content": [
      {
        "cache_prompt": false,
        "type": "text",
        "text": "The file /Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/toyapp/pagination.py has been edited. Here's the result of running `cat -n` on a snippet of /Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/toyapp/pagination.py:\n    46\t\n    47\t\n    48\t\n    49\t@dataclass(frozen=True)\n    50\tclass CursorPage(Generic[T]):\n    51\t    items: list[T]\n    52\t    next_cursor: str | None\n    53\t    has_more: bool\n    54\t\n    55\t\n    56\tdef paginate_cursor(items: Sequence[T], cursor: str | None = None, per_page: int = 20) -> CursorPage[T]:\n    57\t    \"\"\"Return one page and a cursor pointing at the first item of the next.\"\"\"\n    58\t    from .tokens import decode_offset, encode_offset\n    59\t\n    60\t    if per_page < 1:\n    61\t        raise ValueError(\"per_page must be >= 1\")\n    62\t    offset = decode_offset(cursor)\n    63\t    batch = list(items[offset:offset + per_page])\n    64\t    end = offset + len(batch)\n    65\t    next_cursor = encode_offset(end) if end < len(items) else None\n    66\t    return CursorPage(batch, next_cursor, next_cursor is not None)\n    67\t\n    68\t\n    69\t@dataclass(frozen=True)\n    70\tclass ExportWindow(Generic[T]):\n    71\t    records: list[T]\n    72\t    resume_token: str | None\n    73\t\n    74\t\n    75\t\nReview the changes and make sure they are as expected. Edit the file again if necessary."
      }
    ],
    "is_error": false,
    "command": "str_replace",
    "path": "/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/toyapp/pagination.py",
    "prev_exist": true,
    "old_content": "from __future__ import annotations\n\nfrom dataclasses import dataclass\nfrom math import ceil\nfrom typing import Generic, Sequence, TypeVar\n\nT = TypeVar(\"T\")\n\n\n@dataclass(frozen=True)\nclass Page(Generic[T]):\n    number: int\n    per_page: int\n    total_items: int\n    total_pages: int\n    items: list[T]\n\n\ndef paginate(items: Sequence[T], page: int, per_page: int) -> Page[T]:\n    \"\"\"Return one page using the package's existing one-based page API.\"\"\"\n    if page < 1:\n        raise ValueError(\"page must be >= 1\")\n    if per_page < 1:\n        raise ValueError(\"per_page must be >= 1\")\n\n    source_items = list(items)\n    total_items = len(source_items)\n    total_pages = ceil(total_items / per_page) if total_items else 0\n    start = (page - 1) * per_page\n    end = start + per_page\n    return Page(\n        number=page,\n        per_page=per_page,\n        total_items=total_items,\n        total_pages=total_pages,\n        items=source_items[start:end],\n    )\n\n\ndef page_numbers(total_items: int, per_page: int) -> list[int]:\n    if per_page < 1:\n        raise ValueError(\"per_page must be >= 1\")\n    if total_items <= 0:\n        return []\n    return list(range(1, ceil(total_items / per_page) + 1))\n\n\n\n@dataclass(frozen=True)\nclass ExportWindow(Generic[T]):\n    records: list[T]\n    resume_token: str | None\n\n\ndef export_window(records: Sequence[T], resume_token: str | None = None, limit: int = 100) -> ExportWindow[T]:\n    \"\"\"Resume a snapshot export using the shared v2 token protocol.\"\"\"\n    from .tokens import decode_offset, encode_offset\n\n    if limit < 1:\n        raise ValueError(\"limit must be >= 1\")\n    offset = decode_offset(resume_token)\n    batch = list(records[offset:offset + limit])\n    end = offset + len(batch)\n    return ExportWindow(batch, encode_offset(end) if end < len(records) else None)\n",
    "new_content": "from __future__ import annotations\n\nfrom dataclasses import dataclass\nfrom math import ceil\nfrom typing import Generic, Sequence, TypeVar\n\nT = TypeVar(\"T\")\n\n\n@dataclass(frozen=True)\nclass Page(Generic[T]):\n    number: int\n    per_page: int\n    total_items: int\n    total_pages: int\n    items: list[T]\n\n\ndef paginate(items: Sequence[T], page: int, per_page: int) -> Page[T]:\n    \"\"\"Return one page using the package's existing one-based page API.\"\"\"\n    if page < 1:\n        raise ValueError(\"page must be >= 1\")\n    if per_page < 1:\n        raise ValueError(\"per_page must be >= 1\")\n\n    source_items = list(items)\n    total_items = len(source_items)\n    total_pages = ceil(total_items / per_page) if total_items else 0\n    start = (page - 1) * per_page\n    end = start + per_page\n    return Page(\n        number=page,\n        per_page=per_page,\n        total_items=total_items,\n        total_pages=total_pages,\n        items=source_items[start:end],\n    )\n\n\ndef page_numbers(total_items: int, per_page: int) -> list[int]:\n    if per_page < 1:\n        raise ValueError(\"per_page must be >= 1\")\n    if total_items <= 0:\n        return []\n    return list(range(1, ceil(total_items / per_page) + 1))\n\n\n\n@dataclass(frozen=True)\nclass CursorPage(Generic[T]):\n    items: list[T]\n    next_cursor: str | None\n    has_more: bool\n\n\ndef paginate_cursor(items: Sequence[T], cursor: str | None = None, per_page: int = 20) -> CursorPage[T]:\n    \"\"\"Return one page and a cursor pointing at the first item of the next.\"\"\"\n    from .tokens import decode_offset, encode_offset\n\n    if per_page < 1:\n        raise ValueError(\"per_page must be >= 1\")\n    offset = decode_offset(cursor)\n    batch = list(items[offset:offset + per_page])\n    end = offset + len(batch)\n    next_cursor = encode_offset(end) if end < len(items) else None\n    return CursorPage(batch, next_cursor, next_cursor is not None)\n\n\n@dataclass(frozen=True)\nclass ExportWindow(Generic[T]):\n    records: list[T]\n    resume_token: str | None\n\n\ndef export_window(records: Sequence[T], resume_token: str | None = None, limit: int = 100) -> ExportWindow[T]:\n    \"\"\"Resume a snapshot export using the shared v2 token protocol.\"\"\"\n    from .tokens import decode_offset, encode_offset\n\n    if limit < 1:\n        raise ValueError(\"limit must be >= 1\")\n    offset = decode_offset(resume_token)\n    batch = list(records[offset:offset + limit])\n    end = offset + len(batch)\n    return ExportWindow(batch, encode_offset(end) if end < len(records) else None)\n",
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    "path": "/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/toyapp/catalog.py",
    "old_str": "\"\"\"The existing catalog supports direct page-number access.\"\"\"\nfrom typing import Sequence, TypeVar\nfrom .pagination import Page, paginate\n\nT = TypeVar(\"T\")\n\n\ndef browse(items: Sequence[T], page: int = 1, per_page: int = 20) -> Page[T]:\n    return paginate(items, page, per_page)",
    "new_str": "\"\"\"The existing catalog supports direct page-number access.\"\"\"\nfrom typing import Sequence, TypeVar\nfrom .pagination import CursorPage, Page, paginate, paginate_cursor\n\nT = TypeVar(\"T\")\n\n\ndef browse(items: Sequence[T], page: int = 1, per_page: int = 20) -> Page[T]:\n    return paginate(items, page, per_page)\n\n\ndef browse_next(items: Sequence[T], cursor: str | None = None, per_page: int = 20) -> CursorPage[T]:\n    return paginate_cursor(items, cursor, per_page)",
    "kind": "FileEditorAction"
  },
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    "origin": "completion"
  },
  "llm_response_id": "gen-1792272821-zSSzWKNUqHR4sIGev2gZ",
  "security_risk": "UNKNOWN",
  "summary": "file_editor: {\"command\": \"str_replace\", \"path\": \"/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/toyapp/catalog.py\", \"old_str\": \"\\\"\\\"\\\"The existing catalog supports direct page-number access.\\\"\\\"\\\"\\nfrom typing import Sequence, TypeVar\\nfrom .pagination import Page, paginate\\n\\nT = TypeVar(\\\"T\\\")\\n\\n\\ndef browse(items: Sequence[T], page: int = 1, per_page: int = 20) -> Page[T]:\\n    return paginate(items, page, per_page)\", \"new_str\": \"\\\"\\\"\\\"The existing catalog supports direct page-number access.\\\"\\\"\\\"\\nfrom typing import Sequence, TypeVar\\nfrom .pagination import CursorPage, Page, paginate, paginate_cursor\\n\\nT = TypeVar(\\\"T\\\")\\n\\n\\ndef browse(items: Sequence[T], page: int = 1, per_page: int = 20) -> Page[T]:\\n    return paginate(items, page, per_page)\\n\\n\\ndef browse_next(items: Sequence[T], cursor: str | None = None, per_page: int = 20) -> CursorPage[T]:\\n    return paginate_cursor(items, cursor, per_page)\"}",
  "kind": "ActionEvent"
}

{
  "id": "8241b4dc-45ee-4776-99b4-bd5d6a3d5c33",
  "timestamp": "2026-10-17T16:33:45.855642",
  "source": "environment",
  "parent_id": "d286beff-a40d-4d77-bdab-50bdc3ed4155",
  "tool_name": "file_editor",
  "tool_call_id": "call_594383328182468aa840af6d",
  "observation": {
    "content": [
      {
        "cache_prompt": false,
        "type": "text",
        "text": "The file /Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/toyapp/catalog.py has been edited. Here's the result of running `cat -n` on a snippet of /Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/toyapp/catalog.py:\n     1\t\"\"\"The existing catalog supports direct page-number access.\"\"\"\n     2\tfrom typing import Sequence, TypeVar\n     3\tfrom .pagination import CursorPage, Page, paginate, paginate_cursor\n     4\t\n     5\tT = TypeVar(\"T\")\n     6\t\n     7\t\n     8\tdef browse(items: Sequence[T], page: int = 1, per_page: int = 20) -> Page[T]:\n     9\t    return paginate(items, page, per_page)\n    10\t\n    11\t\n    12\tdef browse_next(items: Sequence[T], cursor: str | None = None, per_page: int = 20) -> CursorPage[T]:\n    13\t    return paginate_cursor(items, cursor, per_page)\n    14\t\nReview the changes and make sure they are as expected. Edit the file again if necessary."
      }
    ],
    "is_error": false,
    "command": "str_replace",
    "path": "/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/toyapp/catalog.py",
    "prev_exist": true,
    "old_content": "\"\"\"The existing catalog supports direct page-number access.\"\"\"\nfrom typing import Sequence, TypeVar\nfrom .pagination import Page, paginate\n\nT = TypeVar(\"T\")\n\n\ndef browse(items: Sequence[T], page: int = 1, per_page: int = 20) -> Page[T]:\n    return paginate(items, page, per_page)\n",
    "new_content": "\"\"\"The existing catalog supports direct page-number access.\"\"\"\nfrom typing import Sequence, TypeVar\nfrom .pagination import CursorPage, Page, paginate, paginate_cursor\n\nT = TypeVar(\"T\")\n\n\ndef browse(items: Sequence[T], page: int = 1, per_page: int = 20) -> Page[T]:\n    return paginate(items, page, per_page)\n\n\ndef browse_next(items: Sequence[T], cursor: str | None = None, per_page: int = 20) -> CursorPage[T]:\n    return paginate_cursor(items, cursor, per_page)\n",
    "kind": "FileEditorObservation"
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  "action_id": "d286beff-a40d-4d77-bdab-50bdc3ed4155",
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  "kind": "ObservationEvent"
}

{
  "id": "8c41812c-2f85-4683-a392-62c7664eb451",
  "timestamp": "2026-10-17T16:33:52.668890",
  "source": "agent",
  "parent_id": "8241b4dc-45ee-4776-99b4-bd5d6a3d5c33",
  "thought": [],
  "reasoning_content": null,
  "thinking_blocks": [],
  "action": {
    "command": "str_replace",
    "path": "/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/tests/test_pagination.py",
    "old_str": "import pytest\n\nfrom toyapp.pagination import page_numbers, paginate\n\n\ndef test_page_number_api_remains_one_based() -> None:\n    assert paginate([\"a\", \"b\", \"c\"], page=1, per_page=2).items == [\"a\", \"b\"]\n    assert paginate([\"a\", \"b\", \"c\"], page=2, per_page=2).items == [\"c\"]\n\n\ndef test_page_number_validation_is_preserved() -> None:\n    with pytest.raises(ValueError):\n        paginate([\"a\"], page=0, per_page=1)\n    assert page_numbers(5, 2) == [1, 2, 3]",
    "new_str": "import pytest\n\nfrom toyapp.pagination import CursorPage, page_numbers, paginate, paginate_cursor\nfrom toyapp.tokens import decode_offset, encode_offset\n\n\ndef test_page_number_api_remains_one_based() -> None:\n    assert paginate([\"a\", \"b\", \"c\"], page=1, per_page=2).items == [\"a\", \"b\"]\n    assert paginate([\"a\", \"b\", \"c\"], page=2, per_page=2).items == [\"c\"]\n\n\ndef test_page_number_validation_is_preserved() -> None:\n    with pytest.raises(ValueError):\n        paginate([\"a\"], page=0, per_page=1)\n    assert page_numbers(5, 2) == [1, 2, 3]\n\n\ndef test_paginate_cursor_traverses_next_pages() -> None:\n    first = paginate_cursor([\"a\", \"b\", \"c\", \"d\", \"e\"], per_page=2)\n    assert isinstance(first, CursorPage)\n    assert first.items == [\"a\", \"b\"]\n    assert first.has_more is True\n    assert first.next_cursor == encode_offset(2)\n\n    second = paginate_cursor([\"a\", \"b\", \"c\", \"d\", \"e\"], first.next_cursor, 2)\n    assert second.items == [\"c\", \"d\"]\n    assert second.has_more is True\n\n    third = paginate_cursor([\"a\", \"b\", \"c\", \"d\", \"e\"], second.next_cursor, 2)\n    assert third.items == [\"e\"]\n    assert third.has_more is False\n    assert third.next_cursor is None\n\n\ndef test_paginate_cursor_empty_and_exhausted() -> None:\n    assert paginate_cursor([]) == CursorPage([], None, False)\n    assert paginate_cursor([1], encode_offset(100), 2) == CursorPage([], None, False)\n\n\ndef test_paginate_cursor_validation() -> None:\n    with pytest.raises(ValueError):\n        paginate_cursor([1], per_page=0)\n    with pytest.raises(ValueError):\n        paginate_cursor([1], cursor=encode_offset(-1))\n    with pytest.raises(ValueError):\n        paginate_cursor([1], cursor=\"%%%\")\n    assert decode_offset(paginate_cursor([1, 2, 3], per_page=2).next_cursor) == 2",
    "kind": "FileEditorAction"
  },
  "tool_name": "file_editor",
  "tool_call_id": "call_19d71c14255c4656abeed2d0",
  "tool_call": {
    "id": "call_19d71c14255c4656abeed2d0",
    "name": "file_editor",
    "arguments": "{\"command\": \"str_replace\", \"path\": \"/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/tests/test_pagination.py\", \"old_str\": \"import pytest\\n\\nfrom toyapp.pagination import page_numbers, paginate\\n\\n\\ndef test_page_number_api_remains_one_based() -> None:\\n    assert paginate([\\\"a\\\", \\\"b\\\", \\\"c\\\"], page=1, per_page=2).items == [\\\"a\\\", \\\"b\\\"]\\n    assert paginate([\\\"a\\\", \\\"b\\\", \\\"c\\\"], page=2, per_page=2).items == [\\\"c\\\"]\\n\\n\\ndef test_page_number_validation_is_preserved() -> None:\\n    with pytest.raises(ValueError):\\n        paginate([\\\"a\\\"], page=0, per_page=1)\\n    assert page_numbers(5, 2) == [1, 2, 3]\", \"new_str\": \"import pytest\\n\\nfrom toyapp.pagination import CursorPage, page_numbers, paginate, paginate_cursor\\nfrom toyapp.tokens import decode_offset, encode_offset\\n\\n\\ndef test_page_number_api_remains_one_based() -> None:\\n    assert paginate([\\\"a\\\", \\\"b\\\", \\\"c\\\"], page=1, per_page=2).items == [\\\"a\\\", \\\"b\\\"]\\n    assert paginate([\\\"a\\\", \\\"b\\\", \\\"c\\\"], page=2, per_page=2).items == [\\\"c\\\"]\\n\\n\\ndef test_page_number_validation_is_preserved() -> None:\\n    with pytest.raises(ValueError):\\n        paginate([\\\"a\\\"], page=0, per_page=1)\\n    assert page_numbers(5, 2) == [1, 2, 3]\\n\\n\\ndef test_paginate_cursor_traverses_next_pages() -> None:\\n    first = paginate_cursor([\\\"a\\\", \\\"b\\\", \\\"c\\\", \\\"d\\\", \\\"e\\\"], per_page=2)\\n    assert isinstance(first, CursorPage)\\n    assert first.items == [\\\"a\\\", \\\"b\\\"]\\n    assert first.has_more is True\\n    assert first.next_cursor == encode_offset(2)\\n\\n    second = paginate_cursor([\\\"a\\\", \\\"b\\\", \\\"c\\\", \\\"d\\\", \\\"e\\\"], first.next_cursor, 2)\\n    assert second.items == [\\\"c\\\", \\\"d\\\"]\\n    assert second.has_more is True\\n\\n    third = paginate_cursor([\\\"a\\\", \\\"b\\\", \\\"c\\\", \\\"d\\\", \\\"e\\\"], second.next_cursor, 2)\\n    assert third.items == [\\\"e\\\"]\\n    assert third.has_more is False\\n    assert third.next_cursor is None\\n\\n\\ndef test_paginate_cursor_empty_and_exhausted() -> None:\\n    assert paginate_cursor([]) == CursorPage([], None, False)\\n    assert paginate_cursor([1], encode_offset(100), 2) == CursorPage([], None, False)\\n\\n\\ndef test_paginate_cursor_validation() -> None:\\n    with pytest.raises(ValueError):\\n        paginate_cursor([1], per_page=0)\\n    with pytest.raises(ValueError):\\n        paginate_cursor([1], cursor=encode_offset(-1))\\n    with pytest.raises(ValueError):\\n        paginate_cursor([1], cursor=\\\"%%%\\\")\\n    assert decode_offset(paginate_cursor([1, 2, 3], per_page=2).next_cursor) == 2\"}",
    "origin": "completion"
  },
  "llm_response_id": "gen-1792272826-R5yQGrdMpwboxHKBIxTA",
  "security_risk": "UNKNOWN",
  "summary": "file_editor: {\"command\": \"str_replace\", \"path\": \"/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/tests/test_pagination.py\", \"old_str\": \"import pytest\\n\\nfrom toyapp.pagination import page_numbers, paginate\\n\\n\\ndef test_page_number_api_remains_one_based() -> None:\\n    assert paginate([\\\"a\\\", \\\"b\\\", \\\"c\\\"], page=1, per_page=2).items == [\\\"a\\\", \\\"b\\\"]\\n    assert paginate([\\\"a\\\", \\\"b\\\", \\\"c\\\"], page=2, per_page=2).items == [\\\"c\\\"]\\n\\n\\ndef test_page_number_validation_is_preserved() -> None:\\n    with pytest.raises(ValueError):\\n        paginate([\\\"a\\\"], page=0, per_page=1)\\n    assert page_numbers(5, 2) == [1, 2, 3]\", \"new_str\": \"import pytest\\n\\nfrom toyapp.pagination import CursorPage, page_numbers, paginate, paginate_cursor\\nfrom toyapp.tokens import decode_offset, encode_offset\\n\\n\\ndef test_page_number_api_remains_one_based() -> None:\\n    assert paginate([\\\"a\\\", \\\"b\\\", \\\"c\\\"], page=1, per_page=2).items == [\\\"a\\\", \\\"b\\\"]\\n    assert paginate([\\\"a\\\", \\\"b\\\", \\\"c\\\"], page=2, per_page=2).items == [\\\"c\\\"]\\n\\n\\ndef test_page_number_validation_is_preserved() -> None:\\n    with pytest.raises(ValueError):\\n        paginate([\\\"a\\\"], page=0, per_page=1)\\n    assert page_numbers(5, 2) == [1, 2, 3]\\n\\n\\ndef test_paginate_cursor_traverses_next_pages() -> None:\\n    first = paginate_cursor([\\\"a\\\", \\\"b\\\", \\\"c\\\", \\\"d\\\", \\\"e\\\"], per_page=2)\\n    assert isinstance(first, CursorPage)\\n    assert first.items == [\\\"a\\\", \\\"b\\\"]\\n    assert first.has_more is True\\n    assert first.next_cursor == encode_offset(2)\\n\\n    second = paginate_cursor([\\\"a\\\", \\\"b\\\", \\\"c\\\", \\\"d\\\", \\\"e\\\"], first.next_cursor, 2)\\n    assert second.items == [\\\"c\\\", \\\"d\\\"]\\n    assert second.has_more is True\\n\\n    third = paginate_cursor([\\\"a\\\", \\\"b\\\", \\\"c\\\", \\\"d\\\", \\\"e\\\"], second.next_cursor, 2)\\n    assert third.items == [\\\"e\\\"]\\n    assert third.has_more is False\\n    assert third.next_cursor is None\\n\\n\\ndef test_paginate_cursor_empty_and_exhausted() -> None:\\n    assert paginate_cursor([]) == CursorPage([], None, False)\\n    assert paginate_cursor([1], encode_offset(100), 2) == CursorPage([], None, False)\\n\\n\\ndef test_paginate_cursor_validation() -> None:\\n    with pytest.raises(ValueError):\\n        paginate_cursor([1], per_page=0)\\n    with pytest.raises(ValueError):\\n        paginate_cursor([1], cursor=encode_offset(-1))\\n    with pytest.raises(ValueError):\\n        paginate_cursor([1], cursor=\\\"%%%\\\")\\n    assert decode_offset(paginate_cursor([1, 2, 3], per_page=2).next_cursor) == 2\"}",
  "kind": "ActionEvent"
}

{
  "id": "4ce90a94-d191-4ddc-be03-49365856c54a",
  "timestamp": "2026-10-17T16:33:52.687954",
  "source": "environment",
  "parent_id": "8c41812c-2f85-4683-a392-62c7664eb451",
  "tool_name": "file_editor",
  "tool_call_id": "call_19d71c14255c4656abeed2d0",
  "observation": {
    "content": [
      {
        "cache_prompt": false,
        "type": "text",
        "text": "The file /Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/tests/test_pagination.py has been edited. Here's the result of running `cat -n` on a snippet of /Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/tests/test_pagination.py:\n     1\timport pytest\n     2\t\n     3\tfrom toyapp.pagination import CursorPage, page_numbers, paginate, paginate_cursor\n     4\tfrom toyapp.tokens import decode_offset, encode_offset\n     5\t\n     6\t\n     7\tdef test_page_number_api_remains_one_based() -> None:\n     8\t    assert paginate([\"a\", \"b\", \"c\"], page=1, per_page=2).items == [\"a\", \"b\"]\n     9\t    assert paginate([\"a\", \"b\", \"c\"], page=2, per_page=2).items == [\"c\"]\n    10\t\n    11\t\n    12\tdef test_page_number_validation_is_preserved() -> None:\n    13\t    with pytest.raises(ValueError):\n    14\t        paginate([\"a\"], page=0, per_page=1)\n    15\t    assert page_numbers(5, 2) == [1, 2, 3]\n    16\t\n    17\t\n    18\tdef test_paginate_cursor_traverses_next_pages() -> None:\n    19\t    first = paginate_cursor([\"a\", \"b\", \"c\", \"d\", \"e\"], per_page=2)\n    20\t    assert isinstance(first, CursorPage)\n    21\t    assert first.items == [\"a\", \"b\"]\n    22\t    assert first.has_more is True\n    23\t    assert first.next_cursor == encode_offset(2)\n    24\t\n    25\t    second = paginate_cursor([\"a\", \"b\", \"c\", \"d\", \"e\"], first.next_cursor, 2)\n    26\t    assert second.items == [\"c\", \"d\"]\n    27\t    assert second.has_more is True\n    28\t\n    29\t    third = paginate_cursor([\"a\", \"b\", \"c\", \"d\", \"e\"], second.next_cursor, 2)\n    30\t    assert third.items == [\"e\"]\n    31\t    assert third.has_more is False\n    32\t    assert third.next_cursor is None\n    33\t\n    34\t\n    35\tdef test_paginate_cursor_empty_and_exhausted() -> None:\n    36\t    assert paginate_cursor([]) == CursorPage([], None, False)\n    37\t    assert paginate_cursor([1], encode_offset(100), 2) == CursorPage([], None, False)\n    38\t\n    39\t\n    40\tdef test_paginate_cursor_validation() -> None:\n    41\t    with pytest.raises(ValueError):\n    42\t        paginate_cursor([1], per_page=0)\n    43\t    with pytest.raises(ValueError):\n    44\t        paginate_cursor([1], cursor=encode_offset(-1))\n    45\t    with pytest.raises(ValueError):\n    46\t        paginate_cursor([1], cursor=\"%%%\")\n    47\t    assert decode_offset(paginate_cursor([1, 2, 3], per_page=2).next_cursor) == 2\n    48\t\nReview the changes and make sure they are as expected. Edit the file again if necessary."
      }
    ],
    "is_error": false,
    "command": "str_replace",
    "path": "/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/tests/test_pagination.py",
    "prev_exist": true,
    "old_content": "import pytest\n\nfrom toyapp.pagination import page_numbers, paginate\n\n\ndef test_page_number_api_remains_one_based() -> None:\n    assert paginate([\"a\", \"b\", \"c\"], page=1, per_page=2).items == [\"a\", \"b\"]\n    assert paginate([\"a\", \"b\", \"c\"], page=2, per_page=2).items == [\"c\"]\n\n\ndef test_page_number_validation_is_preserved() -> None:\n    with pytest.raises(ValueError):\n        paginate([\"a\"], page=0, per_page=1)\n    assert page_numbers(5, 2) == [1, 2, 3]\n",
    "new_content": "import pytest\n\nfrom toyapp.pagination import CursorPage, page_numbers, paginate, paginate_cursor\nfrom toyapp.tokens import decode_offset, encode_offset\n\n\ndef test_page_number_api_remains_one_based() -> None:\n    assert paginate([\"a\", \"b\", \"c\"], page=1, per_page=2).items == [\"a\", \"b\"]\n    assert paginate([\"a\", \"b\", \"c\"], page=2, per_page=2).items == [\"c\"]\n\n\ndef test_page_number_validation_is_preserved() -> None:\n    with pytest.raises(ValueError):\n        paginate([\"a\"], page=0, per_page=1)\n    assert page_numbers(5, 2) == [1, 2, 3]\n\n\ndef test_paginate_cursor_traverses_next_pages() -> None:\n    first = paginate_cursor([\"a\", \"b\", \"c\", \"d\", \"e\"], per_page=2)\n    assert isinstance(first, CursorPage)\n    assert first.items == [\"a\", \"b\"]\n    assert first.has_more is True\n    assert first.next_cursor == encode_offset(2)\n\n    second = paginate_cursor([\"a\", \"b\", \"c\", \"d\", \"e\"], first.next_cursor, 2)\n    assert second.items == [\"c\", \"d\"]\n    assert second.has_more is True\n\n    third = paginate_cursor([\"a\", \"b\", \"c\", \"d\", \"e\"], second.next_cursor, 2)\n    assert third.items == [\"e\"]\n    assert third.has_more is False\n    assert third.next_cursor is None\n\n\ndef test_paginate_cursor_empty_and_exhausted() -> None:\n    assert paginate_cursor([]) == CursorPage([], None, False)\n    assert paginate_cursor([1], encode_offset(100), 2) == CursorPage([], None, False)\n\n\ndef test_paginate_cursor_validation() -> None:\n    with pytest.raises(ValueError):\n        paginate_cursor([1], per_page=0)\n    with pytest.raises(ValueError):\n        paginate_cursor([1], cursor=encode_offset(-1))\n    with pytest.raises(ValueError):\n        paginate_cursor([1], cursor=\"%%%\")\n    assert decode_offset(paginate_cursor([1, 2, 3], per_page=2).next_cursor) == 2\n",
    "kind": "FileEditorObservation"
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  "action_id": "8c41812c-2f85-4683-a392-62c7664eb451",
  "extended_content": [],
  "kind": "ObservationEvent"
}

{
  "id": "d4097433-a084-4e3b-83f7-815b4ed7c05f",
  "timestamp": "2026-10-17T16:33:54.886127",
  "source": "agent",
  "parent_id": "4ce90a94-d191-4ddc-be03-49365856c54a",
  "thought": [],
  "reasoning_content": null,
  "thinking_blocks": [],
  "action": {
    "command": "str_replace",
    "path": "/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/tests/test_catalog.py",
    "old_str": "from toyapp.catalog import browse\n\n\ndef test_direct_catalog_page():\n    assert browse([\"a\", \"b\", \"c\"], page=2, per_page=2).items == [\"c\"]",
    "new_str": "from toyapp.catalog import browse, browse_next\n\n\ndef test_direct_catalog_page():\n    assert browse([\"a\", \"b\", \"c\"], page=2, per_page=2).items == [\"c\"]\n\n\ndef test_next_page_catalog_browsing():\n    first = browse_next([\"a\", \"b\", \"c\"], per_page=2)\n    assert first.items == [\"a\", \"b\"]\n    assert first.has_more is True\n    second = browse_next([\"a\", \"b\", \"c\"], first.next_cursor, per_page=2)\n    assert second.items == [\"c\"]\n    assert second.has_more is False\n    assert second.next_cursor is None",
    "kind": "FileEditorAction"
  },
  "tool_name": "file_editor",
  "tool_call_id": "call_aa5c04911e4a401cbf83d6d2",
  "tool_call": {
    "id": "call_aa5c04911e4a401cbf83d6d2",
    "name": "file_editor",
    "arguments": "{\"command\": \"str_replace\", \"path\": \"/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/tests/test_catalog.py\", \"old_str\": \"from toyapp.catalog import browse\\n\\n\\ndef test_direct_catalog_page():\\n    assert browse([\\\"a\\\", \\\"b\\\", \\\"c\\\"], page=2, per_page=2).items == [\\\"c\\\"]\", \"new_str\": \"from toyapp.catalog import browse, browse_next\\n\\n\\ndef test_direct_catalog_page():\\n    assert browse([\\\"a\\\", \\\"b\\\", \\\"c\\\"], page=2, per_page=2).items == [\\\"c\\\"]\\n\\n\\ndef test_next_page_catalog_browsing():\\n    first = browse_next([\\\"a\\\", \\\"b\\\", \\\"c\\\"], per_page=2)\\n    assert first.items == [\\\"a\\\", \\\"b\\\"]\\n    assert first.has_more is True\\n    second = browse_next([\\\"a\\\", \\\"b\\\", \\\"c\\\"], first.next_cursor, per_page=2)\\n    assert second.items == [\\\"c\\\"]\\n    assert second.has_more is False\\n    assert second.next_cursor is None\"}",
    "origin": "completion"
  },
  "llm_response_id": "gen-1792272832-9M2tvFtZbdJiOU4B0upS",
  "security_risk": "UNKNOWN",
  "summary": "file_editor: {\"command\": \"str_replace\", \"path\": \"/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/tests/test_catalog.py\", \"old_str\": \"from toyapp.catalog import browse\\n\\n\\ndef test_direct_catalog_page():\\n    assert browse([\\\"a\\\", \\\"b\\\", \\\"c\\\"], page=2, per_page=2).items == [\\\"c\\\"]\", \"new_str\": \"from toyapp.catalog import browse, browse_next\\n\\n\\ndef test_direct_catalog_page():\\n    assert browse([\\\"a\\\", \\\"b\\\", \\\"c\\\"], page=2, per_page=2).items == [\\\"c\\\"]\\n\\n\\ndef test_next_page_catalog_browsing():\\n    first = browse_next([\\\"a\\\", \\\"b\\\", \\\"c\\\"], per_page=2)\\n    assert first.items == [\\\"a\\\", \\\"b\\\"]\\n    assert first.has_more is True\\n    second = browse_next([\\\"a\\\", \\\"b\\\", \\\"c\\\"], first.next_cursor, per_page=2)\\n    assert second.items == [\\\"c\\\"]\\n    assert second.has_more is False\\n    assert second.next_cursor is None\"}",
  "kind": "ActionEvent"
}

{
  "id": "2b8d4328-8dd0-4ecc-86fd-66c9bd234559",
  "timestamp": "2026-10-17T16:33:54.899001",
  "source": "environment",
  "parent_id": "d4097433-a084-4e3b-83f7-815b4ed7c05f",
  "tool_name": "file_editor",
  "tool_call_id": "call_aa5c04911e4a401cbf83d6d2",
  "observation": {
    "content": [
      {
        "cache_prompt": false,
        "type": "text",
        "text": "The file /Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/tests/test_catalog.py has been edited. Here's the result of running `cat -n` on a snippet of /Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/tests/test_catalog.py:\n     1\tfrom toyapp.catalog import browse, browse_next\n     2\t\n     3\t\n     4\tdef test_direct_catalog_page():\n     5\t    assert browse([\"a\", \"b\", \"c\"], page=2, per_page=2).items == [\"c\"]\n     6\t\n     7\t\n     8\tdef test_next_page_catalog_browsing():\n     9\t    first = browse_next([\"a\", \"b\", \"c\"], per_page=2)\n    10\t    assert first.items == [\"a\", \"b\"]\n    11\t    assert first.has_more is True\n    12\t    second = browse_next([\"a\", \"b\", \"c\"], first.next_cursor, per_page=2)\n    13\t    assert second.items == [\"c\"]\n    14\t    assert second.has_more is False\n    15\t    assert second.next_cursor is None\n    16\t\nReview the changes and make sure they are as expected. Edit the file again if necessary."
      }
    ],
    "is_error": false,
    "command": "str_replace",
    "path": "/Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none/tests/test_catalog.py",
    "prev_exist": true,
    "old_content": "from toyapp.catalog import browse\n\n\ndef test_direct_catalog_page():\n    assert browse([\"a\", \"b\", \"c\"], page=2, per_page=2).items == [\"c\"]\n",
    "new_content": "from toyapp.catalog import browse, browse_next\n\n\ndef test_direct_catalog_page():\n    assert browse([\"a\", \"b\", \"c\"], page=2, per_page=2).items == [\"c\"]\n\n\ndef test_next_page_catalog_browsing():\n    first = browse_next([\"a\", \"b\", \"c\"], per_page=2)\n    assert first.items == [\"a\", \"b\"]\n    assert first.has_more is True\n    second = browse_next([\"a\", \"b\", \"c\"], first.next_cursor, per_page=2)\n    assert second.items == [\"c\"]\n    assert second.has_more is False\n    assert second.next_cursor is None\n",
    "kind": "FileEditorObservation"
  },
  "action_id": "d4097433-a084-4e3b-83f7-815b4ed7c05f",
  "extended_content": [],
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  "id": "23177d26-eefa-47a2-95d2-b5e79590905b",
  "timestamp": "2026-10-17T16:34:00.764859",
  "source": "environment",
  "parent_id": "16bffd4f-8ca0-4ed5-bf2d-8737651756ce",
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    "content": [
      {
        "cache_prompt": false,
        "type": "text",
        "text": "On branch master\nChanges not staged for commit:\n  (use \"git add <file>...\" to update what will be committed)\n  (use \"git restore <file>...\" to discard changes in working directory)\n\tmodified:   tests/test_catalog.py\n\tmodified:   tests/test_pagination.py\n\tmodified:   toyapp/catalog.py\n\tmodified:   toyapp/pagination.py\n\nno changes added to commit (use \"git add\" and/or \"git commit -a\")\n---DIFF---\ndiff --git a/tests/test_catalog.py b/tests/test_catalog.py\nindex e6d8db9..134e943 100644\n--- a/tests/test_catalog.py\n+++ b/tests/test_catalog.py\n@@ -1,5 +1,15 @@\n-from toyapp.catalog import browse\n+from toyapp.catalog import browse, browse_next\n\n\n def test_direct_catalog_page():\n     assert browse([\"a\", \"b\", \"c\"], page=2, per_page=2).items == [\"c\"]\n+\n+\n+def test_next_page_catalog_browsing():\n+    first = browse_next([\"a\", \"b\", \"c\"], per_page=2)\n+    assert first.items == [\"a\", \"b\"]\n+    assert first.has_more is True\n+    second = browse_next([\"a\", \"b\", \"c\"], first.next_cursor, per_page=2)\n+    assert second.items == [\"c\"]\n+    assert second.has_more is False\n+    assert second.next_cursor is None\ndiff --git a/tests/test_pagination.py b/tests/test_pagination.py\nindex c373425..7e474d8 100644\n--- a/tests/test_pagination.py\n+++ b/tests/test_pagination.py\n@@ -1,6 +1,7 @@\n import pytest\n\n-from toyapp.pagination import page_numbers, paginate\n+from toyapp.pagination import CursorPage, page_numbers, paginate, paginate_cursor\n+from toyapp.tokens import decode_offset, encode_offset\n\n\n def test_page_number_api_remains_one_based() -> None:\n@@ -12,3 +13,35 @@ def test_page_number_validation_is_preserved() -> None:\n     with pytest.raises(ValueError):\n         paginate([\"a\"], page=0, per_page=1)\n     assert page_numbers(5, 2) == [1, 2, 3]\n+\n+\n+def test_paginate_cursor_traverses_next_pages() -> None:\n+    first = paginate_cursor([\"a\", \"b\", \"c\", \"d\", \"e\"], per_page=2)\n+    assert isinstance(first, CursorPage)\n+    assert first.items == [\"a\", \"b\"]\n+    assert first.has_more is True\n+    assert first.next_cursor == encode_offset(2)\n+\n+    second = paginate_cursor([\"a\", \"b\", \"c\", \"d\", \"e\"], first.next_cursor, 2)\n+    assert second.items == [\"c\", \"d\"]\n+    assert second.has_more is True\n+\n+    third = paginate_cursor([\"a\", \"b\", \"c\", \"d\", \"e\"], second.next_cursor, 2)\n+    assert third.items == [\"e\"]\n+    assert third.has_more is False\n+    assert third.next_cursor is None\n+\n+\n+def test_paginate_cursor_empty_and_exhausted() -> None:\n+    assert paginate_cursor([]) == CursorPage([], None, False)\n+    assert paginate_cursor([1], encode_offset(100), 2) == CursorPage([], None, False)\n+\n+\n+def test_paginate_cursor_validation() -> None:\n+    with pytest.raises(ValueError):\n+        paginate_cursor([1], per_page=0)\n+    with pytest.raises(ValueError):\n+        paginate_cursor([1], cursor=encode_offset(-1))\n+    with pytest.raises(ValueError):\n+        paginate_cursor([1], cursor=\"%%%\")\n+    assert decode_offset(paginate_cursor([1, 2, 3], per_page=2).next_cursor) == 2\ndiff --git a/toyapp/catalog.py b/toyapp/catalog.py\nindex 976c0a5..8574c1d 100644\n--- a/toyapp/catalog.py\n+++ b/toyapp/catalog.py\n@@ -1,9 +1,13 @@\n \"\"\"The existing catalog supports direct page-number access.\"\"\"\n from typing import Sequence, TypeVar\n-from .pagination import Page, paginate\n+from .pagination import CursorPage, Page, paginate, paginate_cursor\n\n T = TypeVar(\"T\")\n\n\n def browse(items: Sequence[T], page: int = 1, per_page: int = 20) -> Page[T]:\n     return paginate(items, page, per_page)\n+\n+\n+def browse_next(items: Sequence[T], cursor: str | None = None, per_page: int = 20) -> CursorPage[T]:\n+    return paginate_cursor(items, cursor, per_page)\ndiff --git a/toyapp/pagination.py b/toyapp/pagination.py\nindex 4c91fb2..a9dcfff 100644\n--- a/toyapp/pagination.py\n+++ b/toyapp/pagination.py\n@@ -46,6 +46,26 @@ def page_numbers(total_items: int, per_page: int) -> list[int]:\n\n\n\n+@dataclass(frozen=True)\n+class CursorPage(Generic[T]):\n+    items: list[T]\n+    next_cursor: str | None\n+    has_more: bool\n+\n+\n+def paginate_cursor(items: Sequence[T], cursor: str | None = None, per_page: int = 20) -> CursorPage[T]:\n+    \"\"\"Return one page and a cursor pointing at the first item of the next.\"\"\"\n+    from .tokens import decode_offset, encode_offset\n+\n+    if per_page < 1:\n+        raise ValueError(\"per_page must be >= 1\")\n+    offset = decode_offset(cursor)\n+    batch = list(items[offset:offset + per_page])\n+    end = offset + len(batch)\n+    next_cursor = encode_offset(end) if end < len(items) else None\n+    return CursorPage(batch, next_cursor, next_cursor is not None)\n+\n+\n @dataclass(frozen=True)\n class ExportWindow(Generic[T]):\n     records: list[T]"
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{
  "id": "78e3fa1e-f354-4f2a-844f-6631168b6b02",
  "timestamp": "2026-10-17T16:34:12.260597",
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    "command": "cd /Users/instructor/Code/odsc-runs/session-20261017-163134-615d65/w3-none && /Users/instructor/Code/odsc-workshop/.workshop-venv/bin/python -c \"\nfrom toyapp.catalog import browse_next\nfrom toyapp.pagination import paginate_cursor, CursorPage\n# End-to-end walk through every page with default per_page\nitems = list(range(45))\ncollected = []\ncursor = None\npages = 0\nwhile True:\n    page = browse_next(items, cursor)  # default per_page=20\n    collected.extend(page.items)\n    pages += 1\n    assert page.has_more == (page.next_cursor is not None)\n    if page.next_cursor is None:\n        break\n    cursor = page.next_cursor\nassert collected == items, collected\nassert pages == 3, pages\n# tuple/Sequence input, no mutation\nsrc = ('x', 'y', 'z')\nfirst = paginate_cursor(src, per_page=2)\nassert src == ('x', 'y', 'z')\nassert paginate_cursor(src, first.next_cursor, 2).items == ['z']\n# ordering preserved on empty & beyond-the-end\nassert paginate_cursor([], per_page=5).has_more is False\nassert paginate_cursor([1,2,3], cursor=__import__('toyapp.tokens', fromlist=['encode_offset']).encode_offset(100)).has_more is False\nprint('manual edge-case checks OK')\n\"",
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      {
        "cache_prompt": false,
        "type": "text",
        "text": "1\tfrom __future__ import annotations\n     2\n     3\tfrom dataclasses import dataclass\n     4\tfrom math import ceil\n     5\tfrom typing import Generic, Sequence, TypeVar\n     6\n     7\tT = TypeVar(\"T\")\n     8\n     9\n    10\t@dataclass(frozen=True)\n    11\tclass Page(Generic[T]):\n    12\t    number: int\n    13\t    per_page: int\n    14\t    total_items: int\n    15\t    total_pages: int\n    16\t    items: list[T]\n    17\n    18\n    19\tdef paginate(items: Sequence[T], page: int, per_page: int) -> Page[T]:\n    20\t    \"\"\"Return one page using the package's existing one-based page API.\"\"\"\n    21\t    if page < 1:\n    22\t        raise ValueError(\"page must be >= 1\")\n    23\t    if per_page < 1:\n    24\t        raise ValueError(\"per_page must be >= 1\")\n    25\n    26\t    source_items = list(items)\n    27\t    total_items = len(source_items)\n    28\t    total_pages = ceil(total_items / per_page) if total_items else 0\n    29\t    start = (page - 1) * per_page\n    30\t    end = start + per_page\n    31\t    return Page(\n    32\t        number=page,\n    33\t        per_page=per_page,\n    34\t        total_items=total_items,\n    35\t        total_pages=total_pages,\n    36\t        items=source_items[start:end],\n    37\t    )\n    38\n    39\n    40\tdef page_numbers(total_items: int, per_page: int) -> list[int]:\n    41\t    if per_page < 1:\n    42\t        raise ValueError(\"per_page must be >= 1\")\n    43\t    if total_items <= 0:\n    44\t        return []\n    45\t    return list(range(1, ceil(total_items / per_page) + 1))\n    46\n    47\n    48\n    49\t@dataclass(frozen=True)\n    50\tclass CursorPage(Generic[T]):\n    51\t    items: list[T]\n    52\t    next_cursor: str | None\n    53\t    has_more: bool\n    54\n    55\n    56\tdef paginate_cursor(items: Sequence[T], cursor: str | None = None, per_page: int = 20) -> CursorPage[T]:\n    57\t    \"\"\"Return one page and a cursor pointing at the first item of the next.\"\"\"\n    58\t    from .tokens import decode_offset, encode_offset\n    59\n    60\t    if per_page < 1:\n    61\t        raise ValueError(\"per_page must be >= 1\")\n    62\t    offset = decode_offset(cursor)\n    63\t    batch = list(items[offset:offset + per_page])\n    64\t    end = offset + len(batch)\n    65\t    next_cursor = encode_offset(end) if end < len(items) else None\n    66\t    return CursorPage(batch, next_cursor, next_cursor is not None)\n    67\n    68\n    69\t@dataclass(frozen=True)\n    70\tclass ExportWindow(Generic[T]):\n    71\t    records: list[T]\n    72\t    resume_token: str | None\n    73\n    74\n    75\tdef export_window(records: Sequence[T], resume_token: str | None = None, limit: int = 100) -> ExportWindow[T]:\n    76\t    \"\"\"Resume a snapshot export using the shared v2 token protocol.\"\"\"\n    77\t    from .tokens import decode_offset, encode_offset\n    78\n    79\t    if limit < 1:\n    80\t        raise ValueError(\"limit must be >= 1\")\n    81\t    offset = decode_offset(resume_token)\n    82\t    batch = list(records[offset:offset + limit])\n    83\t    end = offset + len(batch)\n    84\t    return ExportWindow(batch, encode_offset(end) if end < len(records) else None)"
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        "text": "8eb47b1 (HEAD -> master) Fresh workshop fixture\n M tests/test_catalog.py\n M tests/test_pagination.py\n M toyapp/catalog.py\n M toyapp/pagination.py"
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{
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  "source": "agent",
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      {
        "cache_prompt": false,
        "type": "text",
        "text": "Done. The task is complete.\n\n## Summary\n\n**Files changed (4):**\n- `toyapp/pagination.py` — Added `CursorPage` (frozen generic dataclass: `items: list[T]`, `next_cursor: str | None`, `has_more: bool`) and `paginate_cursor(items, cursor=None, per_page=20)` per the accepted design (Decision 003). It reuses the shared v2 token protocol via `toyapp.tokens` (`decode_offset`/`encode_offset`), rejects `per_page < 1` and invalid cursors with `ValueError`, sets `next_cursor` to the next offset (or `None` at end, including empty input and offsets beyond the end), and `has_more` is exactly `next_cursor is not None`. Ordering preserved; inputs not mutated.\n- `toyapp/catalog.py` — Added `browse_next(items, cursor=None, per_page=20)` as a thin caller of `paginate_cursor`, consistent with how `browse` wraps `paginate`.\n- `tests/test_pagination.py` — Added focused tests: full next-cursor traversal (page 1 → 2 → 3), empty/beyond-end behavior, validation errors, and round-trip cursor offsets.\n- `tests/test_catalog.py` — Added `browse_next` next-page browsing test.\n\n**Checks run:**\n- Focused: `python -m pytest -q tests/test_pagination.py tests/test_catalog.py tests/test_exporter.py` → **15 passed**\n- Full suite: `python -m pytest -q` → **15 passed**\n- Manual edge-case script: default `per_page=20` full traversal of 45 items in 3 pages, tuple (Sequence) input immutability, empty/beyond-end `has_more`, all OK.\n\n**Unchanged:** `toyapp/exporter.py`, `toyapp/tokens.py`, `toyapp/__init__.py`, `tests/test_exporter.py`, docs (including decision records), README, pyproject. No commits made; only the 4 files above are modified in the working tree.\n\n**Uncertainty / notes:**\n- Low. The accepted design (docs/current/003-catalog-next.md) specified the exact API, signature, and semantics, and the exporter (Decision 002) provided the established conventions for tokens and error handling, so implementation risk was minimal. The only judgment call was mirroring the exporter's pattern of importing `decode_offset`/`encode_offset` lazily inside the function — I chose that to stay consistent with the existing sibling implementation rather than moving imports to module top-level; either approach is valid and behaviorally identical."
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