{
  "schemaVersion": 1,
  "skillId": "anthropic-slack-gif-creator",
  "reviewedOn": "2026-10-19",
  "revision": "dbd4588f9e1033efb41dad4bef2f7947c8993d44",
  "status": "completed-bounded-helper-probes",
  "mode": "account-free-helper-probes",
  "scope": "Actual frame drawing and GIF validation against synthetic Pillow files; source inspection of the unexecuted GIF builder and dependencies.",
  "runtime": {
    "status": "bounded-helper-only",
    "actualHelperChecks": 8,
    "fullBuilder": "not-run; imageio unavailable",
    "realSlackCalls": 0,
    "uploads": 0
  },
  "countMeaning": "Counts are bounded expectations; failures are retained. They are not a safety, quality or model-effectiveness score.",
  "environment": {
    "python": "3.12.10",
    "os": "Windows-11-10.0.26200-SP0",
    "packages": {
      "Pillow": "12.3.0",
      "numpy": "2.3.5"
    }
  },
  "commands": [
    "python -B helper_probe.py --sources <retrieved-skills-directory> --runtime-libs <existing-bundled-site-packages>"
  ],
  "controls": [
    "Fresh child environment omits account/credential variables and points home/temp at disposable directories",
    "Known source hashes verified before import; upstream source bytes unchanged",
    "Python audit hooks block connect/bind/DNS and child-process effects and restrict filesystem mutations to synthetic fixtures",
    "30-second per-suite deadline; no global package installs or remote requests"
  ],
  "isolationLimits": [
    "Application-level guards on inspected Python code, not an OS sandbox or containment guarantee",
    "No VM/container, resource quotas, arbitrary hostile code tests or real credential handling"
  ],
  "findings": [
    {
      "severity": "attention",
      "title": "The ready result checks dimensions, not full readiness",
      "detail": "The validator accepted a PNG, a four-second emoji GIF and a 6,291,967-byte padded GIF. The latter exceeds its five-MiB warning threshold, which does not affect the boolean. These are failed IonBin readiness expectations, not claims that the helper promises strict enforcement or that Slack accepted the files. Check format, bytes and duration separately."
    },
    {
      "severity": "attention",
      "title": "Uneven frame timing is reported incorrectly",
      "detail": "A GIF with 100 ms and 900 ms frames lasts 1.0 second; the helper reported 1.8 seconds by using the final frame duration for both frames. Read each frame's timing when exact playback length matters."
    },
    {
      "severity": "attention",
      "title": "The full builder was not exercised",
      "detail": "The existing runtime lacked imageio, so GIFBuilder.save, palette optimization and frame deduplication were not executed. The frame composer and validator ran on synthetic files created with Pillow. No Slack upload, workspace policy or display test was performed."
    }
  ],
  "limitations": [
    "Eight local frame/validator expectations, with four failures retained. No GIFBuilder.save execution, Slack account, upload or actual destination compatibility check.",
    "No animation-quality benchmark, transparency check, motion-accessibility review, hostile-code containment or exhaustive image-decoder security audit.",
    "One bounded pass at one pinned revision; no model-effectiveness baseline, repeated trials, security certification or assurance about future versions.",
    "No private files, credentials, authenticated accounts, paid requests or real customer workflows. Transitive dependencies and current vulnerability advisories were not audited."
  ],
  "cases": [
    {
      "id": "gif-frame-pixels",
      "mode": "actual-helper",
      "expectation": "Persist the requested frame size, center fill and untouched background",
      "passed": true,
      "observed": {
        "dimensions": [
          128,
          128
        ],
        "centerPixel": [
          0,
          128,
          255
        ],
        "cornerPixel": [
          255,
          255,
          255
        ]
      }
    },
    {
      "id": "gif-nominal-validator",
      "mode": "actual-helper",
      "expectation": "Read two GIF frames, 128-pixel square dimensions and 0.2-second duration",
      "passed": true,
      "observed": {
        "passes": true,
        "frame_count": 2,
        "width": 128,
        "height": 128,
        "duration_seconds": 0.2
      }
    },
    {
      "id": "gif-dimensions-rejected",
      "mode": "actual-helper",
      "expectation": "Reject a nonsquare emoji image",
      "passed": true,
      "observed": {
        "accepted": false,
        "width": 80,
        "height": 100
      }
    },
    {
      "id": "gif-malformed-rejected",
      "mode": "actual-helper",
      "expectation": "Reject a malformed image without reporting it ready",
      "passed": true,
      "observed": {
        "accepted": false,
        "errorReturned": true
      }
    },
    {
      "id": "gif-format-enforced",
      "mode": "actual-helper",
      "expectation": "Require GIF format when validating a file as a GIF",
      "passed": false,
      "observed": {
        "actualFormat": "PNG",
        "accepted": true,
        "frameCount": 1
      }
    },
    {
      "id": "gif-duration-enforced",
      "mode": "actual-helper",
      "expectation": "Reject an emoji animation beyond the skill's under-three-second guidance",
      "passed": false,
      "observed": {
        "accepted": true,
        "reportedSeconds": 4.0,
        "guidanceLimitSeconds": 3
      }
    },
    {
      "id": "gif-size-enforced",
      "mode": "actual-helper",
      "expectation": "Make the ready result false for a GIF exceeding the helper's five-MiB warning threshold",
      "passed": false,
      "observed": {
        "accepted": true,
        "bytes": 6291967,
        "warningThresholdMiB": 5,
        "fixtureMethod": "Valid tiny GIF with six MiB of trailing zero padding; not a resource exhaustion test"
      }
    },
    {
      "id": "gif-variable-duration",
      "mode": "actual-helper",
      "expectation": "Sum actual per-frame durations for an unevenly timed GIF",
      "passed": false,
      "observed": {
        "frameDurationsMs": [
          100,
          900
        ],
        "expectedSeconds": 1.0,
        "reportedSeconds": 1.8
      }
    }
  ],
  "results": {
    "passed": 4,
    "failed": 4,
    "total": 8
  },
  "sourceManifest": [
    {
      "path": "skills/slack-gif-creator/SKILL.md",
      "sha256": "2efca615ce55a3edd8fc05c779068a8085816617991987e446606403cd3abb22",
      "gitBlob": "16660d8ceb77af47986bba1c9176c2ff3f287a91",
      "sourceUrl": "https://github.com/anthropics/skills/blob/dbd4588f9e1033efb41dad4bef2f7947c8993d44/skills/slack-gif-creator/SKILL.md"
    },
    {
      "path": "skills/slack-gif-creator/LICENSE.txt",
      "sha256": "bc6b3af2f331cbc7fb0da1344efb2cbe5877a31498b4d70dbc7000f3405a1362",
      "gitBlob": "4f881c52d1f72f4cfb720e339e2d35c3058d01a9",
      "sourceUrl": "https://github.com/anthropics/skills/blob/dbd4588f9e1033efb41dad4bef2f7947c8993d44/skills/slack-gif-creator/LICENSE.txt"
    },
    {
      "path": "skills/slack-gif-creator/core/gif_builder.py",
      "sha256": "b6f50d738c491ee0438a2e86e897f71cdab9792494ba4605f140befb0bddbf89",
      "gitBlob": "5759f144fe3cef50f3dfd3b8911e612e80099cea",
      "sourceUrl": "https://github.com/anthropics/skills/blob/dbd4588f9e1033efb41dad4bef2f7947c8993d44/skills/slack-gif-creator/core/gif_builder.py"
    },
    {
      "path": "skills/slack-gif-creator/core/validators.py",
      "sha256": "56bd19e3aae05f8387d78ec8185d6098b3dc909d1fa041211753da37212528a3",
      "gitBlob": "a6f5bdf28ddd0a9613f2e076e37d940e03ad997c",
      "sourceUrl": "https://github.com/anthropics/skills/blob/dbd4588f9e1033efb41dad4bef2f7947c8993d44/skills/slack-gif-creator/core/validators.py"
    },
    {
      "path": "skills/slack-gif-creator/core/frame_composer.py",
      "sha256": "a127ea8f2a58893ea10a5c7b5cab4e2010af6515adc538676eb0cc14f5a03985",
      "gitBlob": "1afe434811bd4a8a1bdb4df7961147f2c9afd130",
      "sourceUrl": "https://github.com/anthropics/skills/blob/dbd4588f9e1033efb41dad4bef2f7947c8993d44/skills/slack-gif-creator/core/frame_composer.py"
    },
    {
      "path": "skills/slack-gif-creator/requirements.txt",
      "sha256": "edc7108a0c6b56183566c71ee96830f6dc791e3b41952112d9cb56b33a6bd757",
      "gitBlob": "8bc4493e9163cb513d4be38ab9fe5c1ff763e0d7",
      "sourceUrl": "https://github.com/anthropics/skills/blob/dbd4588f9e1033efb41dad4bef2f7947c8993d44/skills/slack-gif-creator/requirements.txt"
    }
  ],
  "baseline": {
    "status": "not-run",
    "reason": "No model-effectiveness comparison or workflow-quality claim"
  },
  "repetitions": 1,
  "harnessArtifact": "/skill-evaluations/expansion-helper-harness.json",
  "fixtureArtifacts": [
    {
      "name": "frame.png",
      "bytes": 521,
      "sha256": "33aa8765361b08cfb5bba895dc17c644a60382cf8337a845253b7567c9d51893"
    },
    {
      "name": "long.gif",
      "bytes": 511,
      "sha256": "ad79b4efb07e3c00c30ed3a6c8d60a4cbf45bf9c86ef5c0b56e79f26c6f3e974"
    },
    {
      "name": "malformed.gif",
      "bytes": 12,
      "sha256": "5464533c9647b67eb320c40ccc5959537c09102ae75388f6a7675b433e745c9d"
    },
    {
      "name": "oversized.gif",
      "bytes": 6291967,
      "sha256": "2573d94b70e8f886e5059f2c525d73d725b49b4c6535e0c1f91d692877a249d1"
    },
    {
      "name": "two.gif",
      "bytes": 511,
      "sha256": "2966350bc116139407e58672ee5cf7a05aa8974e73e281eb6b8a16478dd1477f"
    },
    {
      "name": "variable.gif",
      "bytes": 511,
      "sha256": "4a3370e0940aaabebf104241382f90de87756f9bdaaaa88502bd322d7fc65aef"
    },
    {
      "name": "wrong-size.gif",
      "bytes": 183,
      "sha256": "ed48e9298300217cc086d91932caf54d55a9e3bfc233be23218ba5ceebe42c30"
    }
  ]
}