Templated-PPT-Master/runtime/ppt-master/scripts/docs/svg-pipeline.md

SVG Pipeline Tools

Maintenance boundary: post-processing modules serve both the on-disk svg_final/ preview and in-memory native PPTX conversion. Check both consumers before changing or removing a step.

These tools cover post-processing, SVG validation, speaker notes, recorded narration, and PPTX export.

The supported delivery contract has one PPTX path: svg_output/ → the project SVG-to-DrawingML converter → native PPTX. The mandatory finalize_svg.py step separately creates self-contained svg_final/ visual previews, which may be opened directly or inserted into PowerPoint as SVG pictures. There is no SVG-image PPTX output, and PowerPoint's manual Convert-to-Shape operation is unsupported.

svg_authoring_view.py

Create a lightweight editable authoring IR bundle from one PPTX-imported SVG or a directory of imported SVGs:

python3 scripts/svg_authoring_view.py <svg-file-or-directory> -o <output-dir> \
  --projection-kind layered

The operation is non-destructive and refuses existing output files unless --force is explicit. It never writes back to the source SVG. The JSON report on stdout records original/projected byte counts and removals by category. The output directory contains the editable SVGs, one model-readable authoring_summary.json, and one tool-only authoring_manifest.json.

The projected copy:

• removes embedded txbody metadata;
• removes hidden native geometry carriers while retaining and unwrapping their visible preview geometry;
• removes source-object identity/style/hash attributes that are only useful to an exact import round trip;
• keeps visible paths, text, images, stable ids, Master/Layout root markers, selected native-shape intent, and a document-local data-pptx-source-ref on each imported logical object;
• rewrites relative local asset references for the projection's new location;
• compacts imported model-facing frames and safe transform page coordinates to at most two decimals.

The summary stores the current SVG roster plus compact per-file canvas, size, text, image, vector, placeholder, icon, and source-ref counts. Models read the summary and editable SVGs; they do not read the machine manifest. The manifest stores relative source/authoring filenames, source and initial authoring hashes, and source element paths. It deliberately does not copy the opaque payload. The authoring bundle is the editable source for template creation; the complete imported SVG remains immutable native-payload backing. Final templates/*.svg files are materialized and validated from that pair. The IR directory itself is not a supported direct input to svg_to_pptx.py.

Regenerate the summary after direct edits that do not pass through one of the in-place normalization tools:

python3 scripts/svg_authoring_view.py <authoring-dir> --refresh-summary

This projection is separate from canonical preset authoring. New project SVGs and project-owned templates use the compact authored form: one atomic <g data-pptx-authoring="preset"> owns the preset intent and base paint, with the registry-generated visible <path> layers as direct children. Quality check and export rerender the locked registry to validate that group, so the compact form has no hidden carrier, preview wrapper, or serialized preview fingerprint. pptx_to_svg.py continues to emit the expanded carrier/preview evidence required for import and round-trip decisions. The normative boundary is owned by shared-standards-core.md §1.5, with authoring guidance in native-shape-authoring.md.

Shape Boolean maintenance smoke

Run this manual smoke from the repository root after changing shape_boolean_svg.py, preset geometry, path conversion, or custom-geometry import/export. It uses only a gitignored projects/_smoke_* workspace and the inline-smoke convention from code-style.md §11; do not turn it into a test file or example deck.

python3 - <<'PY'
import re
import subprocess
import sys
import tempfile
import zipfile
from pathlib import Path
from xml.etree import ElementTree as ET

import pathops

project = Path(tempfile.mkdtemp(prefix="_smoke_shape_boolean_", dir="projects"))
scripts = Path("skills/ppt-master/scripts")
svg_output = project / "svg_output"
svg_output.mkdir()
(project / "spec_lock.md").write_text(
    """<!-- ppt-master-schema: spec-lock/v1 -->
# Execution Lock

## canvas
- viewBox: 0 0 1280 720
- format: ppt169
## communication
- audience:
- objective:
- core_message:
## mode
- mode: briefing
## visual_style
- visual_style: Boolean maintenance smoke
## colors
- bg: #FFFFFF
- primary: #2563EB
- accent: #F97316
- text: #0F172A
## typography
- font_family: Arial, sans-serif
- title_family: Arial, sans-serif
- body_family: Arial, sans-serif
- title: 36
- body: 20
## icons
- library: none
- inventory: none
## page_rhythm
- P01: dense
## pptx_structure
- mode: flat
## forbidden
- Unsupported SVG constructs
""",
    encoding="utf-8",
)


def run_tool(script, *args):
    result = subprocess.run(
        [sys.executable, str(scripts / script), *map(str, args)],
        capture_output=True, text=True,
    )
    assert result.returncode == 0, result.stderr or result.stdout
    return result.stdout.strip()

preset = run_tool(
    "preset_shape_svg.py", "render", "rightArrow",
    "--id", "preset-source", "--frame", "500", "120", "240", "120",
    "--fill", "#2563EB", "--stroke", "none",
)
source = project / "operands.svg"
source.write_text(
    f"""<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1280 720">
  <defs><clipPath id="clip"><rect width="80" height="80"/></clipPath></defs>
  <g transform="translate(100 80) scale(1.2)">
    <rect id="body" x="40" y="40" width="400" height="240" rx="20"
      fill="#2563EB" stroke="#0F172A" stroke-width="5"
      stroke-dasharray="10 4"/>
    <circle id="cutout" cx="240" cy="160" r="70" fill="#F97316"/>
    <text id="text-cutout" x="240" y="235" text-anchor="middle"
      font-family="sans-serif" font-size="180" font-weight="700">01</text>
    <text id="missing-font" x="240" y="235"
      font-family="Definitely Missing Font" font-size="80">X</text>
    <text id="nested-text" x="240" y="235"
      font-family="sans-serif" font-size="80"><tspan>X</tspan></text>
    <path id="open" d="M 40 320 L 260 320 L 260 420" fill="#2563EB"/>
    <rect id="clipped" x="40" y="320" width="160" height="100"
      clip-path="url(#clip)" fill="#2563EB"/>
    <path id="imported" d="M 240 320 H 400 V 420 H 240 Z"
      data-pptx-geometry-kind="custom" fill="#2563EB"/>
    <rect id="dashoffset" x="440" y="320" width="120" height="100"
      fill="#2563EB" stroke="#0F172A" stroke-dashoffset="2"/>
    <rect id="non-scaling" x="500" y="40" width="150" height="120"
      fill="#2563EB" stroke="#0F172A" stroke-width="5"
      stroke-dasharray="10 4" vector-effect="non-scaling-stroke"/>
    <circle id="non-scaling-cut" cx="625" cy="100" r="45" fill="#F97316"/>
    <rect id="far" x="800" y="320" width="100" height="80" fill="#2563EB"/>
  </g>
  {preset}
  <circle id="preset-cut" cx="690" cy="180" r="52" fill="#F97316"/>
</svg>
""",
    encoding="utf-8",
)

operations = [
    ("union", "union", "preset-source", "preset-cut"),
    ("combine", "combine", "body", "cutout"),
    ("fragment", "fragment", "body", "cutout"),
    ("intersect", "intersect", "body", "cutout"),
    ("subtract", "subtract", "body", "cutout"),
    ("text-subtract", "subtract", "body", "text-cutout"),
]
expected_custom_shapes = 0
for index, (name, operation, first, second) in enumerate(operations, start=1):
    fragment = run_tool(
        "shape_boolean_svg.py", "render", source, "--operation", operation,
        "--source", first, "--source", second, "--id", f"result-{name}",
    )
    paths = list(
        ET.fromstring(
            f'<svg xmlns="http://www.w3.org/2000/svg">{fragment}</svg>'
        )
    )
    assert paths and all(path.tag.endswith("}path") for path in paths)
    assert all(
        token not in fragment
        for token in ("clip-path=", "fill-rule=", "mask=", "transform=")
    )
    if operation == "fragment":
        assert len(paths) > 1
        assert [path.get("id") for path in paths] == [
            f"result-{name}-{piece}"
            for piece in range(1, len(paths) + 1)
        ]
    else:
        assert len(paths) == 1
        assert paths[0].get("id") == f"result-{name}"
    if operation == "combine":
        assert all(path.get("stroke-width") == "6" for path in paths)
        assert all(path.get("stroke-dasharray") == "12 4.8" for path in paths)
    if operation == "subtract":
        assert (paths[0].get("d") or "").count("M ") >= 2

    expected_custom_shapes += len(paths)
    (svg_output / f"{index:02d}_{name}.svg").write_text(
        '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1280 720" '
        'data-pptx-page-role="content">'
        '<rect x="0" y="0" width="1280" height="720" fill="#FFFFFF"/>'
        f"{fragment}</svg>\n",
        encoding="utf-8",
    )

non_scaling = ET.fromstring(
    run_tool(
        "shape_boolean_svg.py", "render", source, "--operation", "union",
        "--source", "non-scaling", "--source", "non-scaling-cut",
        "--id", "result-non-scaling",
    )
)
assert non_scaling.get("stroke-width") == "5"
assert non_scaling.get("stroke-dasharray") == "10 4"
assert non_scaling.get("vector-effect") == "non-scaling-stroke"

rejections = [
    ("union", "body", "open", "open subpath"),
    ("union", "body", "clipped", "uses clip-path"),
    ("union", "body", "imported", "PPTX import/round-trip metadata"),
    ("union", "body", "dashoffset", "stroke-dashoffset"),
    ("intersect", "body", "far", "produced no filled area"),
    ("subtract", "body", "missing-font", "cannot resolve an installed font"),
    ("subtract", "body", "nested-text", "child content is unsupported"),
]
for operation, first, second, expected_error in rejections:
    rejected = subprocess.run(
        [
            sys.executable,
            str(scripts / "shape_boolean_svg.py"),
            "render", str(source), "--operation", operation,
            "--source", first, "--source", second,
            "--id", f"reject-{second}",
        ],
        capture_output=True, text=True,
    )
    assert rejected.returncode != 0
    assert expected_error in rejected.stderr, rejected.stderr

run_tool(
    "svg_quality_checker.py", project,
    "--quick-generate", "--format", "ppt169",
    "--stage", "final", "--json",
)
pptx = project / "boolean-smoke.pptx"
run_tool("svg_to_pptx.py", project, "--quick-generate", "-o", pptx)
with zipfile.ZipFile(pptx) as archive:
    slides = [
        name
        for name in archive.namelist()
        if re.fullmatch(r"ppt/slides/slide\d+\.xml", name)
    ]
    custom_shapes = sum(
        archive.read(name).count(b"<a:custGeom>")
        for name in slides
    )
assert len(slides) == len(operations), slides
assert custom_shapes == expected_custom_shapes

readback = project / "readback"
run_tool(
    "pptx_to_svg.py", pptx, "-o", readback,
    "--inheritance-mode", "flat", "--strict",
)
slides = sorted((readback / "svg").glob("slide_*.svg"))
readback_custom_shapes = sum(
    slide.read_text(encoding="utf-8").count('data-pptx-custgeom="')
    for slide in slides
)
assert len(slides) == len(operations), slides
assert readback_custom_shapes == expected_custom_shapes
print(
    f"Shape Boolean smoke: passed "
    f"({expected_custom_shapes} custom shapes; {project})"
)
PY

The seven inline negative cases must return nonzero and match their expected errors; every other command must pass. Open the printed boolean-smoke.pptx path in PowerPoint: both shape-cut and text-cut Subtract results must have real holes, and every Fragment sibling must remain separately selectable.

compact_svg_coordinates.py

Compact safe model-facing page-space coordinates without rewriting unrelated SVG formatting:

python3 scripts/compact_svg_coordinates.py <svg-file-or-directory>
python3 scripts/compact_svg_coordinates.py <template-directory> \
  --inplace --keep-native-frames

The default run is a dry-run JSON report. --inplace atomically replaces only changed SVG files. The shared create-template final pass uses --keep-native-frames: it compacts data-pptx-bounds, translation values, rotation centers, and matrix e/f, while preserving canonical authored-preset or inline native frames. svg_authoring_view.py separately compacts imported model-facing frames because unchanged mirror refs can recover their exact coordinates from immutable lossless backing.

The compactor never rounds path/points geometry, normalized crop or nested viewBox ratios, gradient offsets, opacity, scale arguments, rotation angles, or matrix a/b/c/d coefficients. Type A mirror materialization invokes the same compactor before native-record externalization; standard and fidelity use the shared final pass before template validation.

extract_svg_assets.py

Factor large vector subtrees out of lightweight authoring IR documents and replace them with compact <use data-icon> references:

python3 scripts/extract_svg_assets.py <layered_svg_dir> \
  --icons-dir <icons_dir> --icon-namespace imported \
  --inplace --id-prefix layered
python3 scripts/extract_svg_assets.py <flat_svg_dir> \
  --icons-dir <icons_dir> --icon-namespace imported \
  --reuse-inventory <layered_inventory.json> \
  --inplace --id-prefix flat

The first pass records a source fingerprint before namespacing each extracted asset's internal ids. The second pass reuses a fingerprint-matched asset and writes no duplicate SVG file. Unmatched flat-only subtrees still extract normally. Use --clean-stale on both import-workspace passes to remove stale generated files for their respective prefixes. In create-template workspaces, imported is the fixed namespace: assets live once under icons/imported/, and the working SVGs reference them as data-icon="imported/<name>". Inventory entries retain source refs from each extracted subtree, allowing expansion to reconnect the authoring-manifest mapping. A rerun on an already rewritten namespaced projection inventories those references and does not progressively extract their remaining parent or sibling geometry. An in-place pass over an authoring bundle refreshes authoring_summary.json automatically.

mirror_template_materialize.py

Compile one Type A PPTX import workspace into a deterministic structured mirror template after the layered authoring IR has been reviewed and edited:

python3 scripts/mirror_template_materialize.py \
  <import_workspace> <empty_template_workspace>

The command treats <import_workspace>/authoring-svg/ as the sole editable source. It reads the tool-only layered authoring manifest internally and validates it against immutable lossless SVG hashes, source PPTX hash, complete Master/Layout/Slide graph, inheritance visibility facts, source-ref closure, and extracted-vector inventory before it writes anything. It refuses a non-empty destination and stages the whole result before atomic publication, so a failed preflight cannot leave a partial template.

Materialization preserves source page order and emits one definition-only layout_<layout_key>.svg for every source Layout unused by all source Slides. It mechanically expands fixed Master/Layout group wrappers into direct atoms, rehydrates only unchanged converter-supported Slide-local/slot refs, keeps the current SVG fallback for edited refs, preserves explicit text hard breaks, and removes every IR-only source ref. Imported axis-flipped groups retain their geometry reflection while descendant SVG text receives a matching counter-reflection, preserving PowerPoint's upright glyph appearance in browser previews. Supported opaque p:txBody, relationship-free p:style, and a:custGeom payloads are deduplicated into templates/native_payloads.json.gz. Repeated native restoration attributes are stored there as short data-pptx-native-ref records; page and imported-vector SVGs retain only those record ids and content-hash payload references. The native record referenced by an imported text placeholder carrier owns its authoritative source frame, so the Slide-local frame can differ from reusable Layout bounds without restoring long exact coordinates inline. Structural Master/Layout, placeholder, layer, and editable-object fields remain inline. Source p:sldLayout@showMasterSp and p:sld@showMasterSp facts become canonical root data-pptx-show-master-shapes and data-pptx-show-inherited-shapes booleans.

Checker, template-structure validation, and export hydrate both store layers in memory; legacy inline payload and v1 payload-only stores remain readable.

The published ppt-master.template-execution-manifest.v1 roster points to one compact ppt-master.template-text-slots.v2-min sidecar per prototype. Each text slot contains only selector, role, current_text, text_segments, and tspan_count; a top-level tool hash covers its selectors and immutable text/tspan topology and attributes. These records are deterministic tool diagnostics, not page-authoring inputs. Page-context emits only the complete prototype's path and SHA for that reference, so the model reads the SVG once per execution context and reuses it until the SHA changes. The model chooses semantics and edits only existing visible text values, while checker and structured export validate output attributes, text/tspan topology, and referenced-resource hashes against the prototype.

The output routes reusable vectors once to icons/imported/, bitmaps to images/, and other referenced files to templates/assets/. The JSON report reports payload occurrence, native-record, unique-byte, and compressed-store counts and is written to stdout only. The command intentionally does not create templates/design_spec.md; Template_Designer writes the package-specific rules and page roster after materialization. This compiler is for Type A mirror materialization, not standard / fidelity, loose Type B SVGs, ordinary generation, finalize, or export.

extract_svg_pictures.py

Normalize one deliberately selected complex SVG object into one PowerPoint picture. The command accepts exact <g id> values only, writes each group as a tight standalone SVG asset, embeds its local image/CSS dependencies, and replaces the source group at the same parent index with one <image>. Native export therefore emits one p:pic backed by SVG media.

python3 scripts/extract_svg_pictures.py \
  "<workspace>/authoring-svg/<layered_svg_file>.svg" \
  --select "<group_id>" \
  --resource-root "<workspace>" \
  --images-dir "<workspace>/picture-assets" \
  --inplace

Imported PowerPoint groups normally provide data-pptx-frame, which is used as the picture bounds. For a large standalone SVG without frame metadata, the tool measures the selected group with Playwright; use repeated --bounds ID=x,y,width,height values when browser measurement is unavailable or when effect overflow needs an explicit frame. --padding expands the chosen bounds. The generated *_picture_asset_inventory.json records the bounds source, asset hash, copied definition ids, and embedded local resources. Nested selections are accepted only through metadata-only <g> ancestors. When an ancestor carries a transform, style, clip, opacity, or other visual attribute, select that outer group instead; this prevents applying the ancestor effect once inside the SVG asset and again to the replacement <image>. Scripts, foreignObject, SVG animation, remote resources, and external SVG fragment references fail closed; local image/CSS resources must stay inside the declared --resource-root and are embedded into the asset. An in-place rewrite inside an authoring bundle refreshes authoring_summary.json automatically.

This operation belongs only to an explicit create-template normalization decision in standard or fidelity mode. It does not choose groups, detect repetition, infer a Master/Layout, or run during ordinary import, free generation, mirror materialization, finalize, or export. Placeholder, native single-shape, table/chart, icon-placeholder, and authored-preset groups are rejected because they already own a different semantic route.

Do not confuse this tool with extract_svg_assets.py:

• extract_svg_assets.py is a model-readability optimization. It replaces heuristic vector runs with <use data-icon>, then re-inlines them before export so the PPTX still contains native shapes.
• extract_svg_pictures.py is an explicit representation change. It replaces only named groups with <image>, so each result intentionally remains one editable PowerPoint picture rather than individually editable paths.

Recommended Pipeline

Run these steps one at a time. Wait for each command to exit successfully before starting the next command.

When the effective Speaker Notes outcome in design_spec.md §I is enabled, run:

python3 scripts/total_md_split.py <project_path>

After total_md_split.py exits successfully, run:

python3 scripts/finalize_svg.py <project_path>

After finalize_svg.py exits successfully, run:

python3 scripts/svg_to_pptx.py <project_path>

When Speaker Notes is disabled, skip total_md_split.py and use python3 scripts/svg_to_pptx.py <project_path> --no-notes for the final command. This prevents stale files under notes/ from being embedded.

Do not start another post-processing command while the current command is still running. The canonical gates and success criteria are owned by generate-pptx.md Step 7.

finalize_svg.py

Unified post-processing entry point. This is the preferred way to run SVG cleanup.

It aggregates:

• embed_icons.py
• static same-document <use> expansion from svg_to_pptx/use_expander.py
• align_embed_images.py (crop-images / fix-aspect / embed-images aliases route here)
• flatten_tspan.py

svg_final/ remains a required Step 7.2 artifact even though the native exporter reads svg_output/. It is the self-contained visual reference and may be manually inserted as an SVG picture.

svg_to_pptx.py

Convert project SVGs into PPTX.

python3 scripts/svg_to_pptx.py <project_path>
# Explicit compact image export:
python3 scripts/svg_to_pptx.py <project_path> --image-sizing display --image-scale 2 --image-quality 85
# Force original image bytes:
python3 scripts/svg_to_pptx.py <project_path> --no-image-optimize
python3 scripts/svg_to_pptx.py <project_path> --native-charts-and-tables
python3 scripts/svg_to_pptx.py <project_path> --pptx-structure structured  # deck/layout template override
python3 scripts/svg_to_pptx.py <project_path> --pptx-structure flat  # free-design/brand-only override
# Template-import visual round-trip diagnostic only:
python3 scripts/svg_to_pptx.py <template_import_output> -s svg-flat
# Post-processed-source comparison diagnostic only (never a release export):
python3 scripts/svg_to_pptx.py <project_path> -s final
python3 scripts/svg_to_pptx.py <project_path> --no-notes
python3 scripts/svg_to_pptx.py <project_path> -t none
python3 scripts/svg_to_pptx.py <project_path> --auto-advance 3
python3 scripts/svg_to_pptx.py <project_path> --animation mixed --animation-duration 0.8
python3 scripts/svg_to_pptx.py <project_path> --reflow-text  # opt-in PowerPoint reflow
python3 scripts/svg_to_pptx.py <project_path> --no-merge    # one text frame per visual line
python3 scripts/svg_to_pptx.py <project_path> --recorded-narration audio
python3 scripts/svg_to_pptx.py <project_path> --recorded-narration audio --animation-config animations.json
python3 scripts/svg_to_pptx.py <project_path> --recorded-narration audio --no-animations

Native image export defaults to --image-sizing cap: it preserves source bytes when no resize or EXIF geometry normalization is required, and re-encodes only images that require one of those transformations. The display command above is an explicit compact export; --no-image-optimize disables all native image optimization and forces original bytes.

The normal command reads pptx_structure.mode from spec_lock.md. For legacy projects whose lock exists but predates that field, export emits one compatibility warning and uses flat; no SVG regeneration is required. A missing spec_lock.md, an explicit legacy/unknown mode, or a requested structured export without an explicit current structured contract remains blocking.

Explicit direct generation may use the quick-generate profile after the current agent has converted/read sources, researched identified factual gaps, and prepared the required images, icons, formulas, and resource manifests as needed. That profile skips Strategist, Confirm UI, design_spec.md, and spec_lock.md; it does not skip the resources required by the authored pages. After the complete SVG roster exists, run its lockless final checker, then export:

python3 scripts/svg_quality_checker.py <project_path> \
  --quick-generate --stage final --json
python3 scripts/svg_to_pptx.py <project_path> --quick-generate

This direct-export flag takes svg_output/ as its authored page source, resolves valid project-local resources referenced by those pages, infers one consistent canvas, uses flat converter-default package scaffolding, and does not read or require spec_lock.md. Notes, motion, narration, native objects, conversion trace, and other ordinary exporter capabilities remain available; notes, custom object animation, and narration start off in Quick and may be enabled when needed. The exporter refuses a missing, blocking, non-final, or stale Quick final report before PPTX creation. Default-path output retains the normal postflight report and backup/ snapshot; explicit -o retains the ordinary no-backup behavior. Existing source, analysis, image/icon/formula, and resource-manifest artifacts remain untouched.

For generated-project narration, follow the generate-audio stage. It owns voice selection, audio generation, and the narrated re-export workflow.

Behavior:

• Default output (either Generate profile, no -o):
  • exports/<project_name>_<timestamp>.pptx — native editable pptx (canonical output)
  • validation/<project_name>_<timestamp>.report.json — package postflight, quality-gate linkage, unresolved resource audit, and published part counts
  • backup/<timestamp>/svg_output/ — copy of authored SVG source for re-export without re-running the LLM
• exports/ contains only final PPTX deliverables; machine-readable quality and postflight reports belong in validation/.
• The default Generate flow always runs finalize_svg.py before export. This directory is the self-contained SVG visual preview; it is not packaged as a second PPTX. Quick-generate deliberately skips it.
• In both Generate profiles, explicit -o/--output changes the native PPTX destination and skips backup/; the postflight report still uses the output stem under the project validation/ directory.
• Postflight reruns ZIP integrity and published Slide count. Internal relationships, structured-package validation, transitions, and animations are enforced before the builder publishes the PPTX and are reported as enforced-at-build, not as repeated postflight checks.
• font_portability warns when a complete font stack has no concrete family or when the converter resolves its Latin / East Asian role to a typeface that normally requires a custom installation. A recommended stack such as "Microsoft YaHei", Arial, sans-serif does not warn merely because it ends with a generic fallback.
• Multiline text export modes:
  • Default: one editable frame retains authored breaks and disables PowerPoint wrapping. An ordinary generated frame uses PowerPoint's native resize-shape-to-fit-text behavior, so deleting a retained break expands the frame instead of leaving text outside it; imported exact frames and structured multiline placeholder carriers retain fixed-size behavior.
  • --reflow-text: eligible same-size lines become flowing prose that PowerPoint may rewrap; a font-size change, list marker, or accepted larger gap remains a paragraph boundary. Legacy --merge-paragraphs aliases this mode.
  • --no-merge: each dy-stacked line becomes an independent frame with its own placement.
  • Detection is conservative: mixed-layout <text> falls back to per-line frames. Use --reflow-text only for resizable body copy and --no-merge only for independent line objects or absolute line positions.
• Native release export reads svg_output/. -s final is an explicit diagnostic override for comparing conversion behavior against post-processed SVGs; it does not change artifact ownership or create a supported release path.
• svg_final/ may be opened directly or inserted into PowerPoint as an SVG picture. PowerPoint's manual Convert-to-Shape operation is outside the compatibility contract.
• On every SVG-authoring route, each file in svg_output/ is the complete visible page-design source. Templates and locks may guide authoring, but finalize/export never use them to overlay visible content missing from the SVG. Notes, animation, narration, transitions, and direct native-PPTX workflows keep their separate inputs and package-level processing.
• For PPTX template-import workspaces, use -s svg-flat when you need a visual round-trip check. The layered svg/ tree is the machine-readable template source and intentionally does not inline inherited master / layout decoration into each slide.
• Native mode is strict about unsupported visual SVG elements: if a visual element cannot be represented or safely preserved, export fails with the SVG file, element tag, and position instead of silently dropping content.
• Omitting --pptx-structure reads spec_lock.md. Free-design, brand-only, and template_reuse_scope: style releases declare mode: flat, omit Master/Layout mappings and SVG structure metadata, and materialize one clean project-owned Master plus one Blank Layout from the current lock. Deck/layout templates use mode: structured only for template_reuse_scope: mirror|layout, with complete unique pptx_masters / pptx_layouts rosters and one page_pptx_layouts assignment per page. A template-backed Layout definition may remain unused by pages and still register in the final package.
• On structured template routes, every page root repeats Master/Layout keys and picker names. Master/Layout fixed visuals are direct semantic atoms. Ordinary layer <g> elements are invalid; one validated compact authored-preset <g> emitted by preset_shape_svg.py is the sole group exception because it compiles to one native shape.
• Every visible direct root <g> requires root-coordinate data-pptx-bounds; nested bounds are ignored. Frame/native metadata never replaces it; placeholder bounds also define the slot frame. Checker compares root bounds with viewBox, descendant text with its module using DrawingML wrapping headroom, and every estimable visible text carrier directly with the root viewBox before that headroom. Images, shapes, paths, <use>, effects, and object frames are excluded from module containment. Per side, ≤1px is ignored; module overflow ≤5% warns and >5% fails, while larger page text overflow always fails. Bounds never clip/reflow; unestimable visible text warns. A wholly off-canvas direct-root Morph endpoint may opt out of page containment with data-pptx-morph-staging="true"; it still needs valid module bounds, retained Morph uses an explicit pair, and partial overflow remains blocking.
• Missing root bounds fails on final pages/templates and under --template-mode; references warn until adapted.
• On structured template routes, each normal slot is a direct root <g id> with semantic type, positive design-zone bounds, and exactly one compatible carrier. Composite object slots use explicit proxy binding; zero-slot Layouts are valid. Flat pages keep all SVG objects Slide-local.
• Flat export maps locked typography/colors into a clean project-owned theme/Master, removes stock content placeholders and unused built-in Layouts, retains only the standard date/footer/slide-number capability hooks, and keeps one Blank Layout without promoting Slide content. Structured export additionally creates one reusable Layout per declared key and reopens the package to verify the full Presentation → Master → Layout → Slide graph, fixed-object order, placeholder identities/bounds, carrier bindings, hidden proxies, and zero-slot Layouts.
• Template page_layouts remains input provenance. Strict preserves the prototype contract; adaptive retains its Master and may use a new Layout identity only when Strategist declared it in the plan and lock. Construction cannot allocate or mutate Layout identity downstream.
• Legacy structured/template contracts using baseline, template, preserve, layout_strategy, data-pptx-layout-kind, distilled/utility, direct atomic placeholders, or incomplete Master identity are rejected with a pointer to create-template. Create a new workspace and generate new structured SVG pages; do not upgrade the existing project in place. Explicit flat free-design/brand-only projects intentionally omit Master identity.
• Native output uses content-hash media filenames, so identical images are reused and different images cannot overwrite each other by sharing a basename.
• [Content_Types].xml is generated from the actual media extensions written into the PPTX. Unknown media extensions fail unless Python's mimetypes can identify them.
• Native export writes to a temporary file first and publishes the requested PPTX only after conversion succeeds. A failed conversion does not replace the main output file.
• --conversion-trace without a path writes validation/<output_stem>.trace.json. --conversion-trace <path> respects the explicit destination; relative paths are resolved from the project root, so exports/<name>.trace.json remains available when intentionally requested.
• Formal default and --quick-generate release export compute the exact SVG source fingerprint and refuse a missing, unreadable, unsupported, non-final, blocking, stale, or unverifiable final quality report before PPTX creation. A project without validation/svg_quality_report.json exits nonzero with the not-provided gate status; run the final checker against its current svg_output/ first. An explicit non-output --source remains a diagnostic override and bypasses this release gate; postflight still records any verifiable report linkage.
• After publication, native export writes validation/<output_stem>.report.json. The report distinguishes authored Slides from internal Layout definitions, reruns ZIP integrity and published Slide-count checks, records slide/layout/master/notes part counts, labels relationship/structured/transition/animation validation as enforced at build time, links the final SVG quality report only when its SHA-256 source fingerprint matches the exact export inputs, and surfaces stale/unverified gates, unresolved template tokens, generic-only font stacks, and external image references. A matching final quality report with introduced warnings yields passed-with-warnings and a quality_introduced_warnings=<N> receipt instead of a clean passed claim.
• By default, a successful command also prints a compact receipt instead of requiring a report read: [POSTFLIGHT] status=<...> quality_gate=<...> slides=<N> warning_categories=<N>, followed by one compact line per warning category and the [PPTX] / [REPORT] paths. Resource-warning lines carry counts; a non-passing quality gate carries its status. Routine agents use this receipt and do not load either complete validation JSON into model context. Full reports remain cold audit artifacts; failure investigation and explicit audits extract only the required fields. --quiet keeps suppressing successful-run output.
• Before publishing structured template output, export reopens the temporary PPTX and validates the Slide → Layout → Master graph and registrations, Layout identity, placeholder identity, reusable bounds, and prompt/level-one sizes. A mismatch aborts publication. Flat release instead validates its single referenced Master/Layout shell and exact date/footer/slide-number hook roster before packaging.
• Authored SVG clip-path restrictions remain. Crop wrappers use an overflow-hidden viewport; preview-safe shape clips target the inner image in viewBox coordinates, while legacy imported wrapper clips remain compatible. Both map to native picture crop/geometry when possible.
• The default Generate flow embeds speaker notes automatically unless --no-notes is used; Quick Generate defaults them off and enables them with --with-notes
• Recorded narration is opt-in:
  • notes_to_audio.py uses edge-tts by default, or a configured cloud TTS provider (elevenlabs, minimax, qwen, cosyvoice), and generates one audio file per slide into audio/
  • Narration text is read strictly from the matching notes/*.md file; the script only skips Markdown heading lines (# ...) and does not summarize, rewrite, or filter delivery notes
  • --recorded-narration audio prepares PowerPoint's "recorded timings and narrations": every slide must have matching m4a / mp3 / wav audio, ffprobe must read every duration, and --animation-trigger on-click is rejected
  • --recorded-narration audio keeps speaker notes, embeds each matching audio file, and writes slide auto-advance timings from page-start lead-in + audio duration + page-tail padding. --narration-start-floor and --narration-padding are independent optional seconds; their defaults are 0.8 and 0.5, and the post-transition lead-in is max(0, start floor - transition duration)
  • While motion remains enabled, narrated export without an explicit --animation-config selects <project>/narration_animations.json when either animation sidecar exists; canonical-only cue synchronization therefore blocks until the derived file exists. Narration-independent custom motion explicitly passes --animation-config animations.json, even when a derived sidecar also exists
  • Without animation sidecars, Generate narration may inherit base-report deck motion via --inherit-motion-from; direct low-level omission keeps legacy fade / no object builds. Use --no-animations to remove object/page motion while retaining narration timings
  • Non-narrated export keeps the existing optional <project>/animations.json default
  • Narration timing merges into the existing slide timing DOM. While motion remains enabled, object-animation rows and the resolved page transition are preserved rather than regenerated; inherited -a none suppresses object rows, and --no-animations removes both motion layers
  • --narration-audio-dir audio is the lower-level embedding path: it embeds whatever files match and allows partial audio coverage
  • Either narration flag names the default-flow export <project_name>_<timestamp>_narrated.pptx, telling it apart from silent exports in the same directory
  • This is intended for direct PowerPoint video export with "Use recorded timings and narrations"
  • Long-audio import and automatic long-audio splitting are not supported; keep narration assets page-level
  • Voice choices can be listed with python3 scripts/notes_to_audio.py --list-common-voices, python3 scripts/notes_to_audio.py --list-voices --locale zh-CN, or provider-specific --provider <name> --list-voices
• Page transitions are controlled by -t/--transition; per-element object animations are controlled by -a/--animation
• Per-element animation applies to ordinary top-level SVG <g id="..."> groups; each group is a PowerPoint shape-target anchor, not necessarily one Animation Pane row. Use one group per logical Slide-local content unit rather than targeting a group count. Master/Layout atoms and slot groups are structural and excluded; exact id tokens remain a fallback only when explicit structural roles are absent
• An explicit animations.json group entry may override the marker-free legacy chrome-name heuristic. It cannot override data-pptx-layer or an explicit static role/placeholder marker
• Start mode is set globally by --animation-trigger, mirroring PowerPoint's Start dropdown: after-previous (default, cascade with --animation-stagger spacing on slide entry), on-click (presenter-paced), or with-previous (all together on slide entry). A sidecar row may override it with trigger; the slide value is only the inherited Start mode
• on-click is for live presentations only; recorded narration rejects every row that resolves to it, including a row with trigger_shape, because the tool does not generate object-level click timings
• Flat SVG roots without top-level groups fall back to at most 8 visible primitives; beyond that, animation is skipped on the slide
• Per-element animation defaults to none. auto is opt-in (-a auto) and maps generic entrance effects from the group's SVG id: information-dense elements get a stable entrance (chart→wipe, card-/step-/pillar-→fly, title/takeaway→fade); image-like and unmatched ids rotate through bounded entrance pools.
• mixed (legacy) deterministically rotates through the canonical entrance pool; random selects from the same entrance pool with a stable seed from the effective deck input. auto, mixed, and random never choose emphasis, motion-path, or exit effects; select an explicit canonical entrance_*, emphasis_*, path_*, or exit_* key for those authored duties. --conversion-trace records each resolved effect when enabled
• --animation-duration controls the inherited per-row schedule length (default 0.4); scalable native effects preserve internal timing ratios, while instantaneous presets keep their authored duration. --animation-stagger supplies the default gap between successive non-trigger-shape rows in after-previous mode (default 0.5)
• Optional object-level overrides live in <project>/animations.json or a path passed via --animation-config; build and validate them with animation_config.py scaffold|validate. The scaffold is neutral (defaults.animation.effect: none, untouched groups {}). A populated group uses either the fully compatible legacy single-effect fields or a non-empty effects[], never both; every effects[] row names an explicit effect
• Transition/object sound remains off by default. After SVG and visual motion are complete, discover bundled ids with sound_sync.py list [--query <term>] and copy only selected ids with sound_sync.py <project> <namespace>/<sound_id> [...]. transition.sound references a project-relative .wav; object-animation sound accepts the existing .m4a/.mp3/.wav path contract, while bundled selections use the synced project-relative .wav. With no selected cue, do not create <project>/sounds/. Export never resolves ids or reads templates/sounds/ directly
• One effects[] row becomes one Animation Pane record on the group's shape target. Each row may independently set sequence order, delay, duration, trigger, and trigger_shape; ordinary rows use page-wide order, while trigger_shape rows keep relative order in separate interactive sequences and imply on-click
• Animation configuration is strict: unknown effects/modes/triggers, invalid finite/range/order values, missing slides/groups, and structural-layer targets fail export without fallback or silent omission
• Generated export reads every slide back and verifies animation row order, including repeated rows on one shape target, trigger, shape target, resolved effect tuple and native behavior signature, duration, and offset. Package validation then checks timing placement, p:cTn ids, and p:spTgt references before publication
• The animation writer does not emit paragraph/text-range builds (p:bldP), custom freeform motion paths, native Chart/SmartArt build sequences, or media playback commands for grouped SVG content. Direct-PPTX routes preserve source object animation and perform structural package validation only; they do not author effects
• The full registry, OOXML rules, and compatibility boundary are documented in pptx-animations.md

Dependency:

pip install python-pptx

total_md_split.py

Split total.md into per-slide note files.

python3 scripts/total_md_split.py <project_path>
python3 scripts/total_md_split.py <project_path> -o <output_directory>
python3 scripts/total_md_split.py <project_path> -q

Requirements:

• Each section begins with #
• Heading text matches the SVG filename
• Sections are separated by ---

svg_quality_checker.py

Validate SVG technical compliance.

python3 scripts/svg_quality_checker.py examples/project/svg_output/01_cover.svg
python3 scripts/svg_quality_checker.py examples/project/svg_output
python3 scripts/svg_quality_checker.py examples/project
python3 scripts/svg_quality_checker.py examples/project --stage first-page
python3 scripts/svg_quality_checker.py examples/project --stage final --json
python3 scripts/svg_quality_checker.py examples/project --format ppt169
python3 scripts/svg_quality_checker.py --all examples
python3 scripts/svg_quality_checker.py examples/project --export
python3 scripts/svg_quality_checker.py path/to/template/templates --template-mode

Checks include:

• viewBox
• banned elements
• paint compatibility: unsupported values error; supported non-default spellings such as rgba() receive non-blocking recommendations for #RRGGBB plus explicit alpha
• line-break structure
• explicit Master/Layout/slot structure for reusable templates
• duplicate empty Layout contracts under different keys

Warnings are advisory: they require no modification or acknowledgement and do not affect the command's zero exit status. Only errors block the quality gate.

--stage first-page resolves only the first authored SVG and permits an incomplete future page roster. --stage final checks the complete project. With --json, the final stage writes validation/svg_quality_report.json, while the first-page stage writes validation/svg_quality_first_page_report.json so it cannot overwrite the release gate (or use --json-output). The report separates release failures (blocking), changed/new advisories (introduced), prototype-identical diagnostics (inherited), and source-conversion losses (source-import). It also fingerprints every checked SVG so postflight cannot mistake a stale report for the current export gate. On a successful run, use the checker exit status and terminal summary; do not load the complete JSON unless a failure investigation or explicit audit requires targeted fields.

Template mode accepts the same compact canonical preset groups as generated pages: one atomic <g data-pptx-authoring="preset"> with direct visible paths. It validates those paths dynamically against the locked registry and does not require an import-style carrier, preview wrapper, fingerprint, or a separate source-payload opt-in marker. Exact syntax remains owned by the linked standards rather than this pipeline overview.

svg_position_calculator.py

Analyze and review supported chart coordinates after SVG generation.

Use this after svg_quality_checker.py passes, and only for chart types supported by this script: bar, pie / donut, radar, line / area / scatter, and grid. Area charts do not have a separate calculator mode: use calc line for the upper boundary points, then close the filled region to the plot area's bottom baseline (y_max) in the SVG.

Calculate expected coordinates

python3 scripts/svg_position_calculator.py calc bar --data "A:185,B:142" --area "130,155,1200,480" --bar-width 120
python3 scripts/svg_position_calculator.py calc line --data "0:50,10:80,20:120" --area "120,120,1200,600" --y-range "0,150"
python3 scripts/svg_position_calculator.py calc pie --data "A:35,B:25,C:20" --center "420,400" --radius 200
python3 scripts/svg_position_calculator.py calc grid --rows 2 --cols 3 --area "50,150,1230,670"

For an area chart, use the line output as the top boundary:

M first_x,first_y ... L last_x,last_y L last_x,y_max L first_x,y_max Z

Manually compare the calculator output with the coordinates already present in the generated SVG. If coordinates differ, update the SVG from the calc output, rerun svg_quality_checker.py, then repeat the coordinate review. The tool intentionally does not rewrite SVG files automatically.

Analyze (inspect existing SVG)

python3 scripts/svg_position_calculator.py analyze <svg_file>

Use this after SVG generation to inspect existing SVG geometry when manual comparison needs more context.

Advanced Standalone Tools

flatten_tspan.py

python3 scripts/svg_finalize/flatten_tspan.py examples/<project>/svg_output
python3 scripts/svg_finalize/flatten_tspan.py path/to/input.svg path/to/output.svg

align_embed_images.py

python3 scripts/svg_finalize/align_embed_images.py path/to/slide.svg
python3 scripts/svg_finalize/align_embed_images.py --dry-run path/to/slide.svg

Use for rare single-file diagnostics when image slice / meet alignment and Base64 embedding must be inspected outside finalize_svg.py. In normal project runs, use python3 scripts/finalize_svg.py <project_path>; the old crop-images, fix-aspect, and embed-images names remain accepted only as finalize_svg.py --only aliases for the merged align-images step.

embed_icons.py

python3 scripts/svg_finalize/embed_icons.py output.svg
python3 scripts/svg_finalize/embed_icons.py svg_output/*.svg
python3 scripts/svg_finalize/embed_icons.py --dry-run svg_output/*.svg

Replaces <use data-icon="chunk-filled/name" .../>, <use data-icon="tabler-filled/name" .../> and <use data-icon="tabler-outline/name" .../> placeholders with actual SVG path elements. Use for manual icon embedding checks outside finalize_svg.py.

SVG Compatibility Contract

The always-on SVG authoring contract lives in shared-standards-core.md, with advanced effects, native data objects, and structured PPTX metadata owned by their conditionally loaded modules. This tool guide does not repeat accepted syntax, rejected constructs, or conditional limits.

svg_quality_checker.py validates source SVG before finalization. finalize_svg.py and native export apply the preprocessing required by that contract, while native conversion fails on unsupported visual elements rather than silently dropping them.