All lecture examples

Workshop 1 · 1C · OpenCode

Historical runtime/model labels are preserved in the evidence; viewer dependency versions do not establish the producing runtime.

22 complete recorded events. This is a transcript, not a Canvas screenshot. Commands are historical evidence.

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        "text": "Fix the off-by-one bug in `toyapp/pagination.py`. The pagination tests describe the correct behavior.\n\n\nDo not modify tests. Work only inside the current repository. Before finishing, run the relevant tests or behavioral checks and inspect the final git status and diff. Report files changed, checks run, and any remaining uncertainty.\n\n\nThe Python test environment is already installed. Use /home/instructor/lab-tools/bin/python -m pytest tests/test_pagination.py -q. Do not install dependencies or create a lockfile for this task."
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{
  "id": "2d148ba6-381f-4046-9bbf-d3ae3ed37ac7",
  "timestamp": "2026-10-03T17:48:42.947315",
  "source": "agent",
  "parent_id": "7e25067b-9999-408f-b915-0c97d6405dcc",
  "tool_call_id": "chatcmpl-tool-93f299b062c13356",
  "title": "toyapp/pagination.py",
  "status": "completed",
  "tool_kind": "read",
  "raw_input": {
    "filePath": "/home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/toyapp/pagination.py"
  },
  "raw_output": {
    "output": "<path>/home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/toyapp/pagination.py</path>\n<type>file</type>\n<content>\n1: from __future__ import annotations\n2: \n3: from dataclasses import dataclass\n4: from math import ceil\n5: from typing import Sequence, TypeVar\n6: \n7: T = TypeVar(\"T\")\n8: \n9: \n10: @dataclass(frozen=True)\n11: class Page:\n12:     number: int\n13:     per_page: int\n14:     total_items: int\n15:     total_pages: int\n16:     items: list[object]\n17: \n18: \n19: def paginate(items: Sequence[T], page: int, per_page: int) -> Page:\n20:     if page < 1:\n21:         raise ValueError(\"page must be >= 1\")\n22:     if per_page < 1:\n23:         raise ValueError(\"per_page must be >= 1\")\n24: \n25:     raw_items = list(items)\n26:     total_items = len(raw_items)\n27:     total_pages = ceil(total_items / per_page) if total_items else 0\n28:     start = (page - 1) * per_page\n29:     end = start + per_page - 1\n30:     return Page(\n31:         number=page,\n32:         per_page=per_page,\n33:         total_items=total_items,\n34:         total_pages=total_pages,\n35:         items=raw_items[start:end],\n36:     )\n37: \n38: \n39: def page_numbers(total_items: int, per_page: int) -> list[int]:\n40:     if total_items <= 0:\n41:         return []\n42:     total_pages = ceil(total_items / per_page)\n43:     return list(range(1, total_pages + 1))\n\n(End of file - total 43 lines)\n</content>",
    "metadata": {
      "preview": "from __future__ import annotations\n\nfrom dataclasses import dataclass\nfrom math import ceil\nfrom typing import Sequence, TypeVar\n\nT = TypeVar(\"T\")\n\n\n@dataclass(frozen=True)\nclass Page:\n    number: int\n    per_page: int\n    total_items: int\n    total_pages: int\n    items: list[object]\n\n\ndef paginate(items: Sequence[T], page: int, per_page: int) -> Page:\n    if page < 1:",
      "truncated": false,
      "loaded": [],
      "display": {
        "type": "file",
        "path": "/home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/toyapp/pagination.py",
        "text": "from __future__ import annotations\n\nfrom dataclasses import dataclass\nfrom math import ceil\nfrom typing import Sequence, TypeVar\n\nT = TypeVar(\"T\")\n\n\n@dataclass(frozen=True)\nclass Page:\n    number: int\n    per_page: int\n    total_items: int\n    total_pages: int\n    items: list[object]\n\n\ndef paginate(items: Sequence[T], page: int, per_page: int) -> Page:\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    raw_items = list(items)\n    total_items = len(raw_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 - 1\n    return Page(\n        number=page,\n        per_page=per_page,\n        total_items=total_items,\n        total_pages=total_pages,\n        items=raw_items[start:end],\n    )\n\n\ndef page_numbers(total_items: int, per_page: int) -> list[int]:\n    if total_items <= 0:\n        return []\n    total_pages = ceil(total_items / per_page)\n    return list(range(1, total_pages + 1))",
        "lineStart": 1,
        "lineEnd": 43,
        "totalLines": 43,
        "truncated": false
      }
    }
  },
  "content": [
    {
      "content": {
        "annotations": null,
        "text": "from __future__ import annotations\n\nfrom dataclasses import dataclass\nfrom math import ceil\nfrom typing import Sequence, TypeVar\n\nT = TypeVar(\"T\")\n\n\n@dataclass(frozen=True)\nclass Page:\n    number: int\n    per_page: int\n    total_items: int\n    total_pages: int\n    items: list[object]\n\n\ndef paginate(items: Sequence[T], page: int, per_page: int) -> Page:\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    raw_items = list(items)\n    total_items = len(raw_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 - 1\n    return Page(\n        number=page,\n        per_page=per_page,\n        total_items=total_items,\n        total_pages=total_pages,\n        items=raw_items[start:end],\n    )\n\n\ndef page_numbers(total_items: int, per_page: int) -> list[int]:\n    if total_items <= 0:\n        return []\n    total_pages = ceil(total_items / per_page)\n    return list(range(1, total_pages + 1))",
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  "id": "f0822e1d-8106-4798-8a32-c8bec3106669",
  "timestamp": "2026-10-03T17:48:43.206807",
  "source": "agent",
  "parent_id": "2d148ba6-381f-4046-9bbf-d3ae3ed37ac7",
  "tool_call_id": "chatcmpl-tool-a3285088af64c46c",
  "title": "tests/test_pagination.py",
  "status": "completed",
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  "raw_input": {
    "filePath": "/home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/tests/test_pagination.py"
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    "output": "<path>/home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/tests/test_pagination.py</path>\n<type>file</type>\n<content>\n1: from toyapp.pagination import paginate\n2: \n3: \n4: def test_first_page_includes_full_page() -> None:\n5:     page = paginate([\"a\", \"b\", \"c\", \"d\"], page=1, per_page=2)\n6:     assert page.items == [\"a\", \"b\"]\n7: \n8: \n9: def test_second_page_includes_full_page() -> None:\n10:     page = paginate([\"a\", \"b\", \"c\", \"d\"], page=2, per_page=2)\n11:     assert page.items == [\"c\", \"d\"]\n12: \n13: \n14: def test_last_page_can_be_partial() -> None:\n15:     page = paginate([\"a\", \"b\", \"c\", \"d\", \"e\"], page=3, per_page=2)\n16:     assert page.items == [\"e\"]\n\n(End of file - total 16 lines)\n</content>",
    "metadata": {
      "preview": "from toyapp.pagination import paginate\n\n\ndef test_first_page_includes_full_page() -> None:\n    page = paginate([\"a\", \"b\", \"c\", \"d\"], page=1, per_page=2)\n    assert page.items == [\"a\", \"b\"]\n\n\ndef test_second_page_includes_full_page() -> None:\n    page = paginate([\"a\", \"b\", \"c\", \"d\"], page=2, per_page=2)\n    assert page.items == [\"c\", \"d\"]\n\n\ndef test_last_page_can_be_partial() -> None:\n    page = paginate([\"a\", \"b\", \"c\", \"d\", \"e\"], page=3, per_page=2)\n    assert page.items == [\"e\"]",
      "truncated": false,
      "loaded": [],
      "display": {
        "type": "file",
        "path": "/home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/tests/test_pagination.py",
        "text": "from toyapp.pagination import paginate\n\n\ndef test_first_page_includes_full_page() -> None:\n    page = paginate([\"a\", \"b\", \"c\", \"d\"], page=1, per_page=2)\n    assert page.items == [\"a\", \"b\"]\n\n\ndef test_second_page_includes_full_page() -> None:\n    page = paginate([\"a\", \"b\", \"c\", \"d\"], page=2, per_page=2)\n    assert page.items == [\"c\", \"d\"]\n\n\ndef test_last_page_can_be_partial() -> None:\n    page = paginate([\"a\", \"b\", \"c\", \"d\", \"e\"], page=3, per_page=2)\n    assert page.items == [\"e\"]",
        "lineStart": 1,
        "lineEnd": 16,
        "totalLines": 16,
        "truncated": false
      }
    }
  },
  "content": [
    {
      "content": {
        "annotations": null,
        "text": "from toyapp.pagination import paginate\n\n\ndef test_first_page_includes_full_page() -> None:\n    page = paginate([\"a\", \"b\", \"c\", \"d\"], page=1, per_page=2)\n    assert page.items == [\"a\", \"b\"]\n\n\ndef test_second_page_includes_full_page() -> None:\n    page = paginate([\"a\", \"b\", \"c\", \"d\"], page=2, per_page=2)\n    assert page.items == [\"c\", \"d\"]\n\n\ndef test_last_page_can_be_partial() -> None:\n    page = paginate([\"a\", \"b\", \"c\", \"d\", \"e\"], page=3, per_page=2)\n    assert page.items == [\"e\"]",
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  "source": "agent",
  "parent_id": "f0822e1d-8106-4798-8a32-c8bec3106669",
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  "id": "f076ad59-dfe7-44e9-b542-c15c7535a039",
  "timestamp": "2026-10-03T17:48:46.537712",
  "source": "agent",
  "parent_id": "a22f7f55-c56d-4cf3-8260-a9ba06a70037",
  "tool_call_id": "chatcmpl-tool-b8466de76595fd5a",
  "title": "toyapp/pagination.py",
  "status": "completed",
  "tool_kind": "edit",
  "raw_input": {
    "filePath": "/home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/toyapp/pagination.py",
    "oldString": "    end = start + per_page - 1",
    "newString": "    end = start + per_page"
  },
  "raw_output": {
    "output": "Edit applied successfully.",
    "metadata": {
      "diagnostics": {},
      "diff": "Index: /home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/toyapp/pagination.py\n===================================================================\n--- /home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/toyapp/pagination.py\n+++ /home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/toyapp/pagination.py\n@@ -25,9 +25,9 @@\n raw_items = list(items)\n total_items = len(raw_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 - 1\n+end = start + per_page\n return Page(\n     number=page,\n     per_page=per_page,\n     total_items=total_items,\n",
      "filediff": {
        "file": "/home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/toyapp/pagination.py",
        "patch": "Index: /home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/toyapp/pagination.py\n===================================================================\n--- /home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/toyapp/pagination.py\n+++ /home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/toyapp/pagination.py\n@@ -25,9 +25,9 @@\n raw_items = list(items)\n total_items = len(raw_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 - 1\n+end = start + per_page\n return Page(\n     number=page,\n     per_page=per_page,\n     total_items=total_items,\n",
        "additions": 1,
        "deletions": 1
      },
      "truncated": false
    }
  },
  "content": [
    {
      "content": {
        "annotations": null,
        "text": "Edit applied successfully.",
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        "type": "text"
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    },
    {
      "path": "/home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z/toyapp/pagination.py",
      "old_text": "    end = start + per_page - 1",
      "new_text": "    end = start + per_page",
      "field_meta": null,
      "type": "diff"
    }
  ],
  "is_error": false,
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  "timestamp": "2026-10-03T17:48:47.809585",
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  "parent_id": "f076ad59-dfe7-44e9-b542-c15c7535a039",
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    "cwd": "/home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z"
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{
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  "timestamp": "2026-10-03T17:48:48.520076",
  "source": "agent",
  "parent_id": "05bcb594-6c41-488a-a98c-2006b159298b",
  "tool_call_id": "chatcmpl-tool-8204271dfd30fbd1",
  "title": "git status && git diff",
  "status": "completed",
  "tool_kind": "execute",
  "raw_input": {
    "command": "git status && git diff",
    "cwd": "/home/instructor/workshop/classroom/flash-classroom-classroom-pagination-ODSC-OpenCode-GLM52--20261003T174151Z"
  },
  "raw_output": {
    "output": "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:   toyapp/pagination.py\n\nno changes added to commit (use \"git add\" and/or \"git commit -a\")\ndiff --git a/toyapp/pagination.py b/toyapp/pagination.py\nindex d276f4e..e510fa3 100644\n--- a/toyapp/pagination.py\n+++ b/toyapp/pagination.py\n@@ -26,7 +26,7 @@ def paginate(items: Sequence[T], page: int, per_page: int) -> Page:\n     total_items = len(raw_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 - 1\n+    end = start + per_page\n     return Page(\n         number=page,\n         per_page=per_page,\n",
    "metadata": {
      "output": "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:   toyapp/pagination.py\n\nno changes added to commit (use \"git add\" and/or \"git commit -a\")\ndiff --git a/toyapp/pagination.py b/toyapp/pagination.py\nindex d276f4e..e510fa3 100644\n--- a/toyapp/pagination.py\n+++ b/toyapp/pagination.py\n@@ -26,7 +26,7 @@ def paginate(items: Sequence[T], page: int, per_page: int) -> Page:\n     total_items = len(raw_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 - 1\n+    end = start + per_page\n     return Page(\n         number=page,\n         per_page=per_page,\n",
      "exit": 0,
      "truncated": false
    }
  },
  "content": [
    {
      "content": {
        "annotations": null,
        "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:   toyapp/pagination.py\n\nno changes added to commit (use \"git add\" and/or \"git commit -a\")\ndiff --git a/toyapp/pagination.py b/toyapp/pagination.py\nindex d276f4e..e510fa3 100644\n--- a/toyapp/pagination.py\n+++ b/toyapp/pagination.py\n@@ -26,7 +26,7 @@ def paginate(items: Sequence[T], page: int, per_page: int) -> Page:\n     total_items = len(raw_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 - 1\n+    end = start + per_page\n     return Page(\n         number=page,\n         per_page=per_page,\n",
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{
  "id": "3056cfed-1a30-4b4c-89a6-96f91772f900",
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