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KDP Interior PDF Checker Preflight
Compare every PDF page's geometry with your chosen paperback trim size and bleed setting. Python 3.11+ required.
$5
KDP Interior PDF Checker Preflight
Example session with this skill installed
Using the installed 0.1.8 Skill and CLI, check my selected private local inputs according to the included README. Return the full JSON receipt; leave inputs unchanged and do not upload. Seller demonstration: synthetic problem and separately prepared correct samples, recorded on Windows/Python 3.12.14.
- Read your context and instructions
- Compiled the kdp interior pdf
Recorded synthetic Windows CLI results
The exact installed 0.1.8 buyer package was run on Windows/Python 3.12.14 with synthetic local files. These are complete JSON results, not a claimed hosted-agent or MCP test. The correct input was prepared separately; this checker did not repair the problem input.
Problem sample
{
"bytes": 3231,
"file": "wrong-width.pdf",
"finding_count": 24,
"findings": [
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 1
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 2
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 3
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 4
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 5
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 6
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 7
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 8
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 9
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 10
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 11
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 12
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 13
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 14
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 15
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 16
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 17
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 18
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 19
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 20
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 21
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 22
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 23
},
{
"actual_height_in": 9,
"actual_width_in": 6.125,
"code": "PAGE_SIZE_MISMATCH",
"page": 24
}
],
"findings_truncated": false,
"kdp_may_round_odd_page_count": false,
"pages": 24,
"scope": "Local page-count and PDF geometry only; not KDP acceptance",
"settings": {
"bleed": false,
"expected_pdf_height_in": 9,
"expected_pdf_width_in": 6,
"trim_height_in": 9,
"trim_width_in": 6
},
"sha256": "a783486f756bbd5a9e003886a1acf8c78d55d78a70a5305c0aea799ac4540b18",
"status": "REVIEW"
}
Separate correct sample
{
"bytes": 3231,
"file": "valid-no-bleed.pdf",
"finding_count": 0,
"findings": [],
"findings_truncated": false,
"kdp_may_round_odd_page_count": false,
"pages": 24,
"scope": "Local page-count and PDF geometry only; not KDP acceptance",
"settings": {
"bleed": false,
"expected_pdf_height_in": 9,
"expected_pdf_width_in": 6,
"trim_height_in": 9,
"trim_width_in": 6
},
"sha256": "b4942e86a7e5de4ffea7028f8a4d6717e88243aa2e01b6288b2f70dd12db4505",
"status": "PASS_LOCAL"
}
Next steps
Inspect every finding, correct only a separate working copy, then repeat the documented local check. Use the platform native review separately; a local pass is not platform acceptance.
Connects securely to your tools. The creator never sees your data.
About this skill
Compare every PDF page's geometry with your chosen paperback trim size and bleed setting.
DOWNLOAD TYPE A local Python CLI with companion Agent Skill instructions and an optional local MCP adapter. Python 3.11+, trusted pip, setuptools>=68 and wheel. pypdf 6.19.0 source and its license are included for local installation. Use your own intended trim and bleed settings on a supported Windows or Linux host.
WHO IT IS FOR Technical self-publishers and production assistants who export paperback PDFs and want a local geometry receipt.
CHECKS INCLUDED
- Measured page dimensions
- Trim and bleed comparison
- Page count and rotation flags
REAL LOCAL DEMO The controlled PDF has 24 pages at 6.125 by 9 inches, but the selected no-bleed setting expects 6 by 9 inches. The report flags all 24 pages. The measured problem sample returned REVIEW; the separate correct sample returned PASS_LOCAL. Synthetic fixtures were run through the exact installed 0.1.8 buyer package on Windows/Python 3.12.14. These are CLI results, not a hosted-agent compatibility test.
WHAT YOU RECEIVE The current 0.1.8 ZIP, local CLI source, Agent Skill instructions, optional MCP adapter, usage guide and packaged examples where supplied. One-time current download; no subscription is needed by the CLI.
LIMITS One local PDF up to 50 MiB and 1,000 pages. User-selected trim dimensions must be 3 to 20 inches. Geometry comparison allows 0.01 inch exporter rounding. These are tool bounds, not the platform's book limits. Not checked: Margins, fonts, image DPI, visual content, cover, print-option eligibility, publishing policy or KDP acceptance.
PRIVACY AND WORKFLOW The checker processes selected local files and prints JSON. It does not edit, merge, upload or import them and does not sign in to your platform. The report contains narrow technical facts and issue codes, not raw feed, manuscript or contact values.
ALTERNATIVES KDP Print Previewer and Kindle Create are free alternatives for other parts of the publishing workflow. This product provides a narrow local page-geometry receipt before that stage.
Use the destination platform's native workflow after correcting or reviewing findings. A local PASS is not platform approval. No affiliation or endorsement is implied.
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- 1
Download the ZIP
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- 2
Unzip into your skills folder
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- 3
Ask your agent to use it
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