{
  "title": "Git operation state matrix",
  "version": "2026-10-26",
  "license": "CC-BY-4.0",
  "code_license": "MIT",
  "git_version": "2.56.0",
  "observed_at": "2026-10-26T16:03:31.803610Z",
  "record_count": 20,
  "canonical": true,
  "units_and_definitions": {
    "HEAD": "Full Git commit object ID.",
    "index_sha256": "SHA256 of exact git ls-files --stage -z bytes; not the filesystem-timestamp-bearing index file.",
    "files_sha256": "SHA256 of compact sorted JSON mapping repository-relative working file paths to SHA256 file bytes.",
    "status": "Exact porcelain v1 status with trailing newline removed; empty means clean.",
    "branch_null": "Detached HEAD, not an unknown branch name.",
    "repeatability": "Two fresh independent executions per case; states and command outputs matched after excluding observation timestamp."
  },
  "scope": "Synthetic local repositories; no external remote, production history or user files. Each case starts independently. Results describe only the declared starting state.",
  "environment": {
    "git_version": "2.56.0",
    "python_version": "3.12.14",
    "os": "Darwin 27.0.0",
    "architecture": "arm64",
    "identity": "Example Author <author@example.invalid>",
    "fixed_commit_date": "2026-10-25T12:00:00Z",
    "timezone": "UTC"
  },
  "columns": [
    "id",
    "task",
    "command",
    "starting_state",
    "git_version",
    "before_HEAD",
    "after_HEAD",
    "before_branch",
    "after_branch",
    "before_index_sha256",
    "after_index_sha256",
    "before_files_sha256",
    "after_files_sha256",
    "before_status",
    "after_status",
    "before_stash_count",
    "after_stash_count",
    "before_commit_count",
    "after_commit_count",
    "exit_code",
    "assertion_pass",
    "HEAD_changed",
    "index_changed",
    "files_changed",
    "case_script",
    "run_record"
  ],
  "records": [
    {
      "id": "R01",
      "cells": {
        "id": {
          "value": "R01",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "task": {
          "value": "Undo a local commit; keep staging",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "command": {
          "value": "git reset --soft HEAD~1",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "starting_state": {
          "value": "Two committed versions; clean index and working file.",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "git_version": {
          "value": "2.56.0",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "before_HEAD": {
          "value": "215874675413c54c28c8f7bc3b08dcd4ee22ba4e",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "after_HEAD": {
          "value": "0411a76bc2f75afb4e02926aa58653147fbc52ff",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "before_branch": {
          "value": "main",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "after_branch": {
          "value": "main",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "before_index_sha256": {
          "value": "85daf324721e487f1b5004eed7a67c3b9297db99a8bc754841bfbe2772940d09",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "after_index_sha256": {
          "value": "85daf324721e487f1b5004eed7a67c3b9297db99a8bc754841bfbe2772940d09",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "before_files_sha256": {
          "value": "ea59ba281fd56fa60aac47d63e3354fa724c03263a0732165597a75eab35a27a",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "after_files_sha256": {
          "value": "ea59ba281fd56fa60aac47d63e3354fa724c03263a0732165597a75eab35a27a",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "before_status": {
          "value": "",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "after_status": {
          "value": "M  note.txt",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "before_stash_count": {
          "value": 0,
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "after_stash_count": {
          "value": 0,
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "before_commit_count": {
          "value": 2,
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "after_commit_count": {
          "value": 1,
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "exit_code": {
          "value": 0,
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "assertion_pass": {
          "value": true,
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "HEAD_changed": {
          "value": true,
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "index_changed": {
          "value": false,
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "files_changed": {
          "value": false,
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "case_script": {
          "value": "/data/examples/matrix/case-01.py",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        },
        "run_record": {
          "value": "/data/examples/matrix/runs/R01.json",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.068437Z"
        }
      },
      "assertions": [
        {
          "assertion": "Branch now has one reachable commit",
          "passed": true
        },
        {
          "assertion": "Working contents unchanged",
          "passed": true
        },
        {
          "assertion": "Expected staged/unstaged status",
          "passed": true
        }
      ],
      "source_urls": [
        "https://gitexplorer.com/data/examples/matrix/runs/R01.json",
        "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc"
      ],
      "repeatability_check": true
    },
    {
      "id": "R02",
      "cells": {
        "id": {
          "value": "R02",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.177332Z"
        },
        "task": {
          "value": "Undo a local commit; keep unstaged edits",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.177332Z"
        },
        "command": {
          "value": "git reset --mixed HEAD~1",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.177332Z"
        },
        "starting_state": {
          "value": "Two committed versions; clean index and working file.",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.177332Z"
        },
        "git_version": {
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          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.177332Z"
        },
        "before_HEAD": {
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          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.177332Z"
        },
        "after_HEAD": {
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          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.177332Z"
        },
        "before_branch": {
          "value": "main",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.177332Z"
        },
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          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
          "observed_at": "2026-10-26T03:19:21.177332Z"
        },
        "before_index_sha256": {
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          "observed_at": "2026-10-26T03:19:21.177332Z"
        },
        "after_index_sha256": {
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        },
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        },
        "after_files_sha256": {
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          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
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        },
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          "observed_at": "2026-10-26T03:19:21.177332Z"
        },
        "after_status": {
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          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
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        },
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        },
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        },
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          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc",
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        },
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        },
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        },
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          "observed_at": "2026-10-26T03:19:21.177332Z"
        },
        "run_record": {
          "value": "/data/examples/matrix/runs/R02.json",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
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          "observed_at": "2026-10-26T03:19:21.177332Z"
        }
      },
      "assertions": [
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        },
        {
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        {
          "assertion": "Expected staged/unstaged status",
          "passed": true
        }
      ],
      "source_urls": [
        "https://gitexplorer.com/data/examples/matrix/runs/R02.json",
        "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-reset.adoc"
      ],
      "repeatability_check": true
    },
    {
      "id": "R03",
      "cells": {
        "id": {
          "value": "R03",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R03.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-restore.adoc",
          "observed_at": "2026-10-26T15:59:10.656501Z"
        },
        "task": {
          "value": "Unstage a tracked file",
          "source_url": "https://gitexplorer.com/data/examples/matrix/runs/R03.json",
          "documentation_url": "https://raw.githubusercontent.com/git/git/v2.56.0/Documentation/git-restore.adoc",
          "observed_at": "2026-10-26T15:59:10.656501Z"
        },
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