Agent skill

PPTX Chart Forensics

A skill your agent uses when diagnosing or fixing PPTX renderer chart mismatches, chart oracle failures, ECharts option drift, OOXML chart XML parsing gaps, axis or legend discrepancies, plotArea…

Apache-2.0Auto-check passedDocuments & Office

Install PPTX Chart Forensics

skills CLI

$ npx skills add aiden0z/pptx-renderer --skill pptx-chart-forensics -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install aiden0z/pptx-renderer pptx-chart-forensics --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/aiden0z/pptx-renderer.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/pptx-chart-forensics .claude/skills/pptx-chart-forensics && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "pptx-chart-forensics" agent skill from https://github.com/aiden0z/pptx-renderer/tree/main/.agents/skills/pptx-chart-forensics into .claude/skills/pptx-chart-forensics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pptx-chart-forensics", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/aiden0z/pptx-renderer/tree/main/.agents/skills/pptx-chart-forensics

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add aiden0z/pptx-renderer --skill pptx-chart-forensics -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install aiden0z/pptx-renderer pptx-chart-forensics --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/aiden0z/pptx-renderer.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/pptx-chart-forensics .agents/skills/pptx-chart-forensics && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "pptx-chart-forensics" agent skill from https://github.com/aiden0z/pptx-renderer/tree/main/.agents/skills/pptx-chart-forensics into .agents/skills/pptx-chart-forensics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pptx-chart-forensics", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add aiden0z/pptx-renderer --skill pptx-chart-forensics -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install aiden0z/pptx-renderer pptx-chart-forensics --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/aiden0z/pptx-renderer.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/pptx-chart-forensics .cursor/skills/pptx-chart-forensics && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "pptx-chart-forensics" agent skill from https://github.com/aiden0z/pptx-renderer/tree/main/.agents/skills/pptx-chart-forensics into .cursor/skills/pptx-chart-forensics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pptx-chart-forensics", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/aiden0z/pptx-renderer.git --path .agents/skills/pptx-chart-forensics

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add aiden0z/pptx-renderer --skill pptx-chart-forensics -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install aiden0z/pptx-renderer pptx-chart-forensics --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/aiden0z/pptx-renderer.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/pptx-chart-forensics .gemini/skills/pptx-chart-forensics && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "pptx-chart-forensics" agent skill from https://github.com/aiden0z/pptx-renderer/tree/main/.agents/skills/pptx-chart-forensics into .gemini/skills/pptx-chart-forensics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pptx-chart-forensics", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install aiden0z/pptx-renderer pptx-chart-forensics

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add aiden0z/pptx-renderer --skill pptx-chart-forensics -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/aiden0z/pptx-renderer.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/pptx-chart-forensics .github/skills/pptx-chart-forensics && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "pptx-chart-forensics" agent skill from https://github.com/aiden0z/pptx-renderer/tree/main/.agents/skills/pptx-chart-forensics into .github/skills/pptx-chart-forensics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pptx-chart-forensics", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add aiden0z/pptx-renderer --skill pptx-chart-forensics -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install aiden0z/pptx-renderer pptx-chart-forensics --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/aiden0z/pptx-renderer.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/pptx-chart-forensics .opencode/skills/pptx-chart-forensics && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "pptx-chart-forensics" agent skill from https://github.com/aiden0z/pptx-renderer/tree/main/.agents/skills/pptx-chart-forensics into .opencode/skills/pptx-chart-forensics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pptx-chart-forensics", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: pptx-chart-forensics
GitHub stars: 127
Token cost: ~970 tokens
SKILL.md length: 321 words
Files: 2
Skills in repo: 3
Repo updated: Sep 23, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

A skill your agent uses when diagnosing or fixing PPTX renderer chart mismatches, chart oracle failures, ECharts option drift, OOXML chart XML parsing gaps, axis or legend discrepancies, plotArea…

Works in 5 steps: Run the focused unit test that failed… → Run the nearby chart unit test files. → Re-run target oracle case and compare… → …
Fixing PPTX renderer chart mismatches
SKILL.md covers Overview, First Moves, Inspect Chart XML and Diagnosis Checklist, plus 4 more sections
Calls python3, npx and curl

What it does

PPTX Chart Forensics is an agent skill from aiden0z/pptx-renderer. Use when diagnosing or fixing PPTX renderer chart mismatches, chart oracle failures, ECharts option drift, OOXML chart XML parsing gaps, axis or legend discrepancies, plotArea issues, or python-pptx chart cases in this repository.

Its SKILL.md is about 970 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).

It sits in Documents & Office, covering PowerPoint presentations. It works with Microsoft PowerPoint and python-pptx. The repository describes itself as: High-fidelity, browser-native PPTX renderer in TypeScript. Parses OOXML into HTML/SVG DOM with rich text, shapes, images, tables, 2D charts, SmartArt, equations, effects, and… The licence is Apache-2.0.

When your agent uses it

Fixing PPTX renderer chart mismatches
Chart oracle failures
ECharts option drift
OOXML chart XML parsing gaps

Example prompts

“/pptx-chart-forensics”

Requirements

Python 3
Node.js

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

Run the focused unit test that failed first.
Run the nearby chart unit test files.
Re-run target oracle case and compare metrics.
Check generated pdf, html, and diff PNGs.
Run a small chart-family sweep.

What it can do on your machine

Read from SKILL.md and the folder at commit 0208050. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- python3
- npx
- curl
- pnpm
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use npx, curl and pnpm, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

PPTX Chart Forensics loads about 970 tokens when it runs. Until then it costs about 63 tokens; SKILL.md has 321 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~63
When it runs · the whole SKILL.md, loaded when a task matches: ~970

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from aiden0z/pptx-renderer at commit 0208050, republished under its Apache-2.0 licence (© aiden0z). 321 words, ~970 tokens.

Download SKILL.mdSave it as .claude/skills/pptx-chart-forensics/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: pptx-chart-forensics
description: Use when diagnosing or fixing PPTX renderer chart mismatches, chart oracle failures, ECharts option drift, OOXML chart XML parsing gaps, axis or legend discrepancies, plotArea issues, or python-pptx chart cases in this repository.

PPTX Chart Forensics

Overview

Use this when a chart case fails. Derive fixes from OOXML before changing ECharts options.

First Moves

For a known chart case, run a single-case probe first:

bash

cd test/e2e
curl -sS -X POST http://127.0.0.1:8080/api/evaluate/CASE \
  > reports/oracle-failures/CASE-chart-probe-$(date +%Y%m%d-%H%M%S).json

Use ?source=windows for Windows cases.

Use a broader sweep only for family impact:

bash

cd test/e2e
.venv/bin/python3 scripts/run_all_shapes_eval.py \
  --cases-dir oracle/cases-full \
  --pypptx-cases-dir oracle/cases-pypptx \
  --out reports/oracle-failures/chart-probe-$(date +%Y%m%d-%H%M%S).json

Record metrics and report path.

Inspect Chart XML

Extract chart XML before editing:

bash

python3 - <<'PY'
from zipfile import ZipFile
case = 'CASE'
source = 'cases'  # use 'windows-cases' for --source windows
path = f'testdata/{source}/{case}/source.pptx'
with ZipFile(path) as z:
    for name in z.namelist():
        if name.startswith('ppt/charts/chart') and name.endswith('.xml'):
            print('---', name)
            print(z.read(name).decode('utf-8')[:12000])
PY

Use testdata/windows-cases when the run used --source windows.

Diagnosis Checklist

Check these before parameter tuning:

Area	Questions
Plot area	Multiple types, combo, stock, 3D, doughnut, scatter, radar, or area?
Series	Explicit `spPr`, marker, smooth, varyColors, order/index, labels, per-point colors?
Axes	`crossBetween`, `majorTickMark`, `tickLblPos`, scaling, delete flags, number format, text props?
Legend	Manual layout, overlay, order, icon shape, custom line/fill?
Defaults	Office default omitted from XML handling?
Unsupported	3D/unsupported where bounded fallback is more honest?

Implementation Rules

Write or update a focused unit test first.
If no XML field explains the mismatch, say so before experimenting.
Prefer parser/model assertions for missing XML and renderer option assertions for ECharts.
Keep fixes scoped to chart modules unless evidence crosses boundaries.
Do not improve one chart while regressing another chart family.
Do not treat low fg_iou alone as proof; text, grid bounds, and anti-aliasing can dominate it.

Targeted tests:

bash

npx vitest run test/unit/renderer/ChartRenderer.test.ts
npx vitest run test/unit/renderer/chart/legendOverlay.test.ts
pnpm typecheck

Verification

After a chart fix:

Run the focused unit test that failed first.
Run the nearby chart unit test files.
Re-run target oracle case and compare metrics.
Check generated pdf, html, and diff PNGs.
Run a small chart-family sweep.

Reporting Back

Report case id, XML facts, suspected gap, files, tests, metrics, unsupported behavior.

Common Mistakes

Do not tune ECharts margins/radii/colors before proving OOXML source.
Do not assume the filename names the actual chart type.
Do not ignore later chart nodes in plotArea; combo charts often hide there.
Do not mark 3D chart parity fixed without a real 3D strategy and oracle coverage.
Do not use a broad sweep as a substitute for single-case evidence.

Files

SKILL.md and 1 other file in .agents/skills/pptx-chart-forensics of aiden0z/pptx-renderer.

SKILL.md
agents/openai.yaml

Open the folder on GitHubat commit 0208050

Compare with similar skills

PPTX Chart Forensics next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

PPTX Chart Forensics compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
PPTX Chart Forensics this skillaiden0z/pptx-renderer	127	—	~970	Automated safety check: Pass	Apache-2.0	15 days ago
Slidesfcakyon/claude-codex-settings	1.2k	1 repos	~1.1k	Automated safety check: Pass	MIT	yesterday
Thesis Defense PPTX Builderzouchenzhen/thesis-defense-pptx-skill	266	—	~2.4k	Automated safety check: Pass	Apache-2.0	4 mo ago
Powerpoint SlidesNoi1r/powerpoint-skill	123	—	~12k	Automated safety check: Notes	MIT	6 mo ago
PPTX HTML Fidelity Auditsanqiufong/slides-from-anything	132	1 repos	~3.5k	Automated safety check: Pass	Apache-2.0	yesterday
PPTXguyi-a/pi-ling	106	—	~2.3k	Automated safety check: Pass	Proprietary	22 days ago

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Works with

Questions about PPTX Chart Forensics

What does PPTX Chart Forensics do?

A skill your agent uses when diagnosing or fixing PPTX renderer chart mismatches, chart oracle failures, ECharts option drift, OOXML chart XML parsing gaps, axis or legend discrepancies, plotArea…. PPTX Chart Forensics is an agent skill from aiden0z/pptx-renderer. Use when diagnosing or fixing PPTX renderer chart mismatches, chart oracle failures, ECharts option drift, OOXML chart XML parsing gaps, axis or legend discrepancies, plotArea issues, or python-pptx chart cases in this repository.

When should I use PPTX Chart Forensics?

PPTX Chart Forensics fits situations like: fixing PPTX renderer chart mismatches; chart oracle failures; ECharts option drift; OOXML chart XML parsing gaps.

How do I install PPTX Chart Forensics in Claude Code?

Run `npx skills add aiden0z/pptx-renderer --skill pptx-chart-forensics -a claude-code`. Or copy the skill folder (.agents/skills/pptx-chart-forensics in aiden0z/pptx-renderer) into .claude/skills/pptx-chart-forensics in your project. Claude Code loads it when a task matches its description.

How do I install PPTX Chart Forensics in Codex?

Run `npx skills add aiden0z/pptx-renderer --skill pptx-chart-forensics -a codex`. Or copy the skill folder (.agents/skills/pptx-chart-forensics in aiden0z/pptx-renderer) into .agents/skills/pptx-chart-forensics in your project. Codex loads it when a task matches its description.

Can I use PPTX Chart Forensics in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add aiden0z/pptx-renderer --skill pptx-chart-forensics -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/pptx-chart-forensics, .gemini/skills/pptx-chart-forensics, .github/skills/pptx-chart-forensics and .opencode/skills/pptx-chart-forensics in your project.

What does PPTX Chart Forensics need to run?

Going by SKILL.md and its folder, PPTX Chart Forensics needs the command-line tools its instructions call (python3, npx, curl and pnpm). Our summary lists: Python 3; Node.js.

Does PPTX Chart Forensics access the network?

SKILL.md contains no URLs. Its commands use npx and curl, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is PPTX Chart Forensics safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does PPTX Chart Forensics use?

PPTX Chart Forensics is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does PPTX Chart Forensics use?

About 970 tokens (SKILL.md is roughly 3.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to PPTX Chart Forensics?

Skills that share tags, products or a category with PPTX Chart Forensics: Slides (fcakyon/claude-codex-settings, 1.2k stars), Thesis Defense PPTX Builder (zouchenzhen/thesis-defense-pptx-skill, 266 stars), Powerpoint Slides (Noi1r/powerpoint-skill, 123 stars) and PPTX HTML Fidelity Audit (sanqiufong/slides-from-anything, 132 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains PPTX Chart Forensics?

aiden0z (a GitHub user) maintains it in aiden0z/pptx-renderer, which has 127 GitHub stars. The repository holds 3 skills in this directory. The repository was last updated on September 23, 2026.

Source: aiden0z/pptx-renderer on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install PPTX Chart Forensics

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

PPTX Chart Forensics

Overview

First Moves

Inspect Chart XML

Diagnosis Checklist

Implementation Rules

Verification

Reporting Back

Common Mistakes

Files

Compare with similar skills

Similar skills

More from aiden0z/pptx-renderer

Related

Questions about PPTX Chart Forensics